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Achill Island (; ) is the largest of the Irish isles and lies off the west coast of Ireland in County Mayo. It has a population of 2,345. Its area is . Achill is attached to the mainland by Michael Davitt Bridge, between the villages of Achill Sound and Polranny. A bridge was first completed here in 1887. Other centres of population include the villages of Keel, Dooagh, Dooega, Dooniver, and Dugort. The parish's main Gaelic football pitch and secondary school are on the mainland at Polranny. Early human settlements are believed to have been established on Achill around 3000 BC. The island is 87% peat bog. The parish of Achill consists of Achill Island, Achillbeg, Inishbiggle and the Corraun Peninsula. Roughly half of the island, including the villages of Achill Sound and Bunacurry are in the Gaeltacht (traditional Irish-speaking region) of Ireland, although the vast majority of the island's population speaks English as their daily language. History It is believed that at the end of the Neolithic Period (around 4000 BC), Achill had a population of 500–1,000 people. The island would have been mostly forest until the Neolithic people began crop cultivation. Settlement increased during the Iron Age, and the dispersal of small promontory forts around the coast indicate the warlike nature of the times. Megalithic tombs and forts can be seen at Slievemore, along the Atlantic Drive and on Achillbeg. Overlords Achill Island lies in the Barony of Burrishoole, in the territory of ancient Umhall (Umhall Uactarach and Umhall Ioctarach), that originally encompassed an area extending from the County Galway/Mayo border to Achill Head. The hereditary chieftains of Umhall were the O'Malleys, recorded in the area in 814 AD when they successfully repelled an onslaught by the Vikings in Clew Bay. The Anglo-Norman invasion of Connacht in 1235 AD saw the territory of Umhall taken over by the Butlers and later by the de Burgos. The Butler Lordship of Burrishoole continued into the late 14th century when Thomas le Botiller was recorded as being in possession of Akkyll and Owyll. Immigration In the 17th and 18th centuries, there was much migration to Achill from other parts of Ireland, particularly Ulster, due to the political and religious turmoil of the time. For a while, there were two different dialects of Irish being spoken on Achill. This led to many townlands being recorded as having two names during the 1824 Ordnance Survey, and some maps today give different names for the same place. Achill Irish still has many traces of Ulster Irish. In the nineteenth and early twentieth centuries, seasonal migration of farm workers to Scotland to pick potatoes took place; these squads of 'tattie howkers' were known as Achill workers, although not all were from Achill, and were organised for potato merchants by gaffers or gangers. Squads travelled from farm to farm to harvest the crop and were allocated basic accommodation. On 15 September 1937 ten young migrant potato pickers from Achill died in a fire at Kirkintilloch. Specific historical sites and events Grace O'Malley's Castle Carrickkildavnet Castle is a 15th-century tower house associated with the O'Malley Clan, who were once a ruling family of Achill. Grace O' Malley, or Granuaile, the most famous of the O'Malleys, was born on Clare Island around 1530. Her father was the chieftain of the barony of Murrisk. The O'Malleys were a powerful seafaring family, who traded widely. Grace became a fearless leader and gained fame as a sea captain and pirate. She is reputed to have met with Queen Elizabeth I in 1593. She died around 1603 and is buried in the O'Malley family tomb on Clare Island. Achill Mission One of Achill's most famous historical sites is that of the Achill Mission or 'the Colony' at Dugort. In 1831, the Anglican (Church of Ireland) Rev Edward Nangle founded a mission at Dugort. The Mission included schools, cottages, an orphanage, an infirmary and a guesthouse. The Colony gave rise to mixed assessments, particularly during the Great Famine when charges of "souperism" were leveled against Nangle. The provision of food across the Achill Mission schools - which also provided 'scriptural' religious instruction - was particularly controversial. For almost forty years, Nangle edited a newspaper called the Achill Missionary Herald and Western Witness, which was printed in Achill. He expanded his mission into Mweelin, Kilgeever, West Achill where a school, church, rectory, cottages and a training school were built. Edward's wife, Eliza, suffered poor health in Achill and died in 1852; she is buried with six of the Nangle children on the slopes of Slievemore in North Achill. In 1848, at the height of the Great Famine, the Achill Mission published a prospectus seeking to raise funds for the acquisition of significant additional lands from Sir Richard O'Donnell. The document gives an overview, from the Mission's perspective, of its activities in Achill over the previous decade and a half including considerable sectarian unrest. In 1851, Edward Nangle confirmed the purchase of the land which made the Achill Mission the largest landowner on the island. The Achill Mission began to decline slowly after Nangle was moved from Achill and closed in the 1880s. When Edward Nangle died in 1883 there were opposing views on his legacy. Railway In 1894, the Westport – Newport railway line was extended to Achill Sound. The railway station is now a hostel. The train provided a great service to Achill, but it also is said to have fulfilled an ancient prophecy. Brian Rua O' Cearbhain had prophesied that 'carts on iron wheels' would carry bodies into Achill on their first and last journey. In 1894, the first train on the Achill railway carried the bodies of victims of the Clew Bay Drowning. This tragedy occurred when a boat overturned in Clew Bay, drowning thirty-two young people. They had been going to meet the steamer which would take them to Scotland for potato picking. The Kirkintilloch Fire in 1937 almost fulfilled the second part of the prophecy when the bodies of ten victims were carried by rail to Achill. While it was not literally the last train, the railway closed just two weeks later. These people had died in a fire in a bothy in Kirkintilloch. This term referred to the temporary accommodation provided for those who went to Scotland to pick potatoes, a migratory pattern that had been established in the early nineteenth century. Kildamhnait Kildamhnait on the south-east coast of Achill is named after St. Damhnait, or Dymphna, who founded a church there in the 7th century. There is also a holy well just outside the graveyard. The present church was built in the 1700s and the graveyard contains memorials to the victims of two of Achill's greatest tragedies, the Kirchintilloch Fire (1937) and the Clew Bay Drowning (1894). The Monastery In 1852, Dr John MacHale, Roman Catholic Archbishop of Tuam, purchased land in Bunnacurry, on which a Franciscan Monastery was established, which, for many years, provided an education for local children. The building of the monastery was marked by a conflict between the Protestants of the mission colony and the workers building the monastery. The dispute is known in the island folklore as the Battle of the Stones. A notable monk who lived at the monastery for almost thirty years was Brother Paul Carney. He wrote a biography of James Lynchehaun who rose to either fame or infamy (depending on whom you spoke to) following his conviction for the 1894 attack on an Englishwoman named Agnes MacDonnell, which left her face disfigured, and the burning of her home, Valley House, Tonatanvally, North Achill. (The home was rebuilt and Mrs MacDonnell died there in 1923, while Lynchehaun escaped to the USA after serving 7 years and successfully resisted extradition but spent his last years in Scotland, where he died.) Brother Carney's-great grandniece, Patricia Byrne, write her own account of Mrs MacDonnell and Lynchehaun, entitled The Veiled Woman of Achill. Brother Carney also wrote accounts of his lengthy fundraising trips across the U.S. at the start of the 20th century. The ruins of this monastery are still to be seen in Bunnacurry today. Valley House The historic Valley House is located in Tonatanvally, "The Valley", near Dugort, in the northeast of Achill Island. The present building sits on the site of a hunting lodge built by the Earl of Cavan in the 19th century. Its notoriety arises from an incident in 1894 in which the then owner, an Englishwoman, Mrs Agnes McDonnell, was savagely beaten and the house set alight by a local man, James Lynchehaun. Lynchehaun had been employed by McDonnell as her land agent, but the two fell out and he was sacked and told to quit his accommodation on her estate. A lengthy legal battle ensued, with Lynchehaun refusing to leave. At the time, in the 1890s, the issue of land ownership in Ireland was politically charged. After the events at the Valley House in 1895, Lynchehaun would falsely claim his actions were carried out on behalf of the Irish Republican Brotherhood and motivated by politics. He escaped custody after serving seven years and fled to the United States seeking political asylum (although Michael Davitt refused to shake his hand, calling Lynchehaun a "murderer"), where he successfully defeated legal attempts by the British authorities to have him extradited to face charges arising from the attack and the burning of the Valley House. Agnes McDonnell suffered terrible injuries from the attack but survived and lived for another 23 years, dying in 1923. Lynchehaun is said to have returned to Achill on two occasions, once in disguise as an American tourist, and eventually died in Girvan, Scotland, in 1937. The Valley House is now a hostel and bar. The Deserted Village Close by Dugort, at the base of Slievemore mountain lies the Deserted Village. There are approximately 80 ruined houses in the village. The houses were built of unmortared stone, which means that no cement or mortar was used to hold the stones together. Each house consisted of just one room and this room was used as a kitchen, living room, bedroom and even a stable. If one looks at the fields around the Deserted Village and right up the mountain, one can see the tracks in the fields of 'lazy beds', which is the way crops like potatoes were grown. In Achill, as in many areas of Ireland, a system called 'Rundale' was used for farming. This meant that the land around a village was rented from a landlord. This land was then shared by all the villagers to graze their cattle and sheep. Each family would then have two or three small pieces of land scattered about the village, which they used to grow crops. For many years people lived in the village and then in 1845 Famine struck in Achill as it did in the rest of Ireland. Most of the families moved to the nearby village of Dooagh, which is beside the sea, while some others emigrated. Living beside the sea meant that fish and shellfish could be used for food. The village was completely abandoned which is where the name 'Deserted Village' came from. No one has lived in these houses since the time of the Famine, however, the families that moved to Dooagh and their descendants, continued to use the village as a 'booley village'. This means that during the summer season, the younger members of the family, teenage boys and girls, would take the cattle to graze on the hillside and they would stay in the houses of the Deserted Village. This custom continued until the 1940s. Boolying was also carried out in other areas of Achill, including Annagh on Croaghaun mountain and in Curraun. At Ailt, Kildownet, the remains of a similar deserted village can be found. This village was deserted in 1855 when the tenants were evicted by the local landlord so the land could be used for cattle grazing; the tenants were forced to rent holdings in Currane, Dooega and Slievemore. Others emigrated to America. Archaeology Recent archaeological research suggests the village was occupied year-round at least as early as the 19th century, though it is known to have served as a seasonally occupied 'booley village' by the first half of the 20th century. A booley village (a number of which exist in a ruined state on the island) is a village occupied only during part of the year, such as a resort community, a lake community, or (as the case on Achill) a place to live while tending flocks or herds of ruminants during winter or summer pasturing. Specifically, some of the people of Dooagh and Pollagh would migrate in the summer to Slievemore and then go back to Dooagh in the autumn. The summer 2009 field school excavated Round House 2 on Slievemore Mountain under the direction of archaeologist Stuart Rathbone. Only the outside north wall, entrance way and inside of the Round House were completely excavated. From 2004 to 2006, the Achill Island Maritime Archaeology Project directed by Chuck Meide was sponsored by the College of William and Mary, the Institute of Maritime History, the Achill Folklife Centre (now the Achill Archaeology Centre), and the Lighthouse Archaeological Maritime Program (LAMP). This project focused on the documentation of archaeological resources related to Achill's rich maritime heritage. Maritime archaeologists recorded a 19th-century fishing station, an ice house, boat house ruins, a number of anchors which had been salvaged from the sea, 19th-century and more recent currach pens, a number of traditional vernacular watercraft including a possibly 100-year-old Achill yawl, and the remains of four historic shipwrecks. Other places of interest The cliffs of Croaghaun on the western end of the island are the third highest sea cliffs in Europe but are inaccessible by road. Near the westernmost point of Achill, Achill Head, is Keem Bay. Keel Beach is quite popular with tourists and some locals as a surfing location. South of Keem beach is Moytoge Head, which with its rounded appearance drops dramatically down to the ocean. An old British observation post, built during World War I to prevent the Germans from landing arms for the Irish Republican Army, is still standing on Moytoge. During the Second World War this post was rebuilt by the Irish Defence Forces as a lookout post for the Coast Watching Service wing of the Defence Forces. It operated from 1939 to 1945. The mountain of Slievemore, (672 m) rises dramatically in the north of the island and the Atlantic Drive (along the south/west of the island) has some scenic views. On the slopes of Slievemore, there is an abandoned village, the "Deserted Village", traditionally thought to be a remnant village from An Gorta Mór (The Great Hunger of 1845–1849). Just west of the deserted village is an old Martello tower, again built by the British to warn of any possible French invasion during the Napoleonic Wars. The area also boasts an approximately 5000-year-old Neolithic tomb. Achillbeg (, Little Achill) is a small island just off Achill's southern tip. Its inhabitants were resettled on Achill in the 1960s. A plaque to Johnny Kilbane is situated on Achillbeg and was erected to celebrate 100 years since his first championship win. The villages of Dooniver and Askill have picturesque scenery and the cycle route is popular with tourists. Caisleán Ghráinne, also known as Kildownet Castle, is a small tower house built in the early 1400s. It is located in Cloughmore, on the south of Achill Island. It is noted for its associations with Grace O'Malley, along with the larger Rockfleet Castle in Newport. Economy While a number of attempts at setting up small industrial units on the island have been made, its economy is largely dependent on tourism. Subventions from Achill people working abroad allowed many families to remain living in Achill throughout the 19th and 20th centuries. In the past, fishing was a significant activity but this aspect of the economy is small now. At one stage, the island was known for its shark fishing, basking shark in particular was fished for its valuable shark liver oil. There was a big spurt of growth in tourism in the 1960s and 1970s before which life was tough and difficult on the island. Despite healthy visitor numbers each year, the common perception is that tourism in Achill has been slowly declining since its heyday. Currently, the largest employers on Achill are two hotels. Religion Most people on Achill are either Roman Catholic or Anglican (Church of Ireland). Overview of the churches Catholic: Bunnacurry Church (Saint Josephs) The Valley Church; Only open for certain events. Dookinella Church Currane Church Pollagh Church Derreens Church Dooega Church Belfarsed Church Achill Sound Church Church of Ireland: Dugort Church (St. Thomas's church) Innisbiggle Island church Other: House of Prayer, Achill Artists For almost two centuries, a number of artists have had a close relationship with Achill Island, including the landscape painter Paul Henry. Within the emerging Irish Free State, Paul Henry's landscapes from Achill and other areas reinforced a vision of Ireland of communities living in harmony with the land. He lived in Achill for almost a decade with his wife, artist Grace Henry and, while using similar subject-matter, the pair developed very different styles. This relationship of artists with Achill was particularly intense in the early decades of the twentieth century when Eva O'Flaherty (1874-1963) became a focal point for artistic networking on the island. A network of over 200 artists linked to Achill is charted in "Achill Painters - An Island History" and includes painters such as the Belgian Marie Howet, the American Robert Henri, the modernist painter Mainie Jellett and contemporary artist Camille Souter. The 2018 Coming Home Art & The Great Hunger exhibition, in partnership with The Great Hunger Museum of Quinnipiac University, USA, featured Achill's Deserted Village and the island lazy beds prominently in works by Geraldine O'Reilly and Alanna O'Kelly; also included was an 1873 painting, 'Cottage, Achill Island' by Alexander Williams - one of the first artists to open up the island to a wider audience. Education Hedge schools existed in most villages of Achill in various periods of history. A university was started by the missions to Achill in Mweelin. In the modern age, there used to be two secondary schools in Achill, Mc Hale College and Scoil Damhnait. However, in August 2011, the two schools amalgamated to form Coláiste Pobail Acla. For primary education, there are eight national schools including Bullsmouth NS, Valley NS, Bunnacurry NS, Dookinella NS, Dooagh NS, Saula NS, Achill Sound NS and Tonragee NS. National schools closed down include Dooega NS, Crumpaun NS, Ashleam NS and Currane NS. Transport Rail Achill railway station, still on the mainland and not on the island, was opened by the Midland Great Western Railway on 13 May 1895, the terminus of its line from Westport via Newport and Mulranny. The station, and the line, were closed by the Great Southern Railways on 1 October 1937. The Great Western Greenway, created during 2010 and 2011, follows the line's route and has proved to be very successful in attracting visitors to Achill and the surrounding areas. Road The R319 road is the main road onto the island. Bus Bus Éireann's route 450 operates several times daily to Westport and Louisburgh from the island's scattered villages. Bus Éireann also provides transport for the area's secondary school children. Cuisine Achill Island has several bars, cafes and restaurants. The island's Atlantic location means that seafood, including lobster, mussels, salmon, trout and winkles, are common meals. With a large sheep and cow populations, lamb and beef are popular on the island too. Sport Achill has a Gaelic football club which competes in the junior championship and division 1E of the Mayo League. There are also Achill Rovers which play in the Mayo Association Football League. There is a 9-hole links golf course on the island. Outdoor activities can be done through Achill Outdoor Education Centre. Achill Island's rugged landscape and the surrounding ocean offers multiple locations for outdoor adventure activities, like surfing, kite-surfing and sea kayaking. Fishing and watersports are also common. Sailing regattas featuring a local vessel type, the Achill Yawl, have been popular since the 19th century, though most present-day yawls, unlike their traditional working boat ancestors, have been structurally modified to promote greater speed under sail. The island's waters and underwater sites are occasionally visited by scuba divers, though Achill's unpredictable weather generally has precluded a commercially successful recreational diving industry. Population In 2016, the population was 2,594, with 5.2% claiming they spoke Irish on a daily basis outside the education system. The island's population has declined from around 6,000 before the Great Famine of the mid-19th century. Demographics The table below reports data on Achill Island's population taken from Discover the Islands of Ireland (Alex Ritsema, Collins Press, 1999) and the census of Ireland. Architecture Few inhabited houses date from before the 20th century, though there are many examples of abandoned stone structures dating to the 19th century. The best known of these earlier can be seen in the "Deserted Village" ruins near the graveyard at the foot of Slievemore. Even the houses in this village represent a relatively comfortable class of dwelling as, even as recently as a hundred years ago, some people still used "Beehive" style houses (small circular single-roomed dwellings with a hole in the ceiling to let out smoke). Many of the oldest inhabited cottages date from the activities of the Congested Districts Board for Ireland—a body set up around the turn of the 20th century in Ireland to improve the welfare of the inhabitants of small villages and towns. Most of the homes in Achill at the time were very small and tightly packed together in villages. The CDB subsidised the building of new, more spacious (though still small by modern standards) homes outside of the traditional villages. Notable people Heinrich Böll, German writer who spent several summers with his family and later lived several months per year on the island Charles Boycott (1832–1897), unpopular landowner from whom the term boycott arose Nancy Corrigan, pioneer aviator, second female commercial pilot in the US. Dermot Freyer (1883–1970), writer who opened a hotel on the island Paul Henry, artist, stayed on the island for a number of years in the early 1900s James Kilbane, singer, lives on the island Johnny Kilbane, boxer Saoirse McHugh, former Green Party politician Danny McNamara, musician Richard McNamara, musician Eva O’Flaherty, Nationalist, model and milliner Thomas Patten, from Dooega. Died during the Siege of Madrid in December 1936 Honor Tracy, author, lived there until her death in 1989 Literature Heinrich Böll: Irisches Tagebuch, Berlin, 1957 Bob Kingston The Deserted Village at Slievemore, Castlebar, 1990 Theresa McDonald: Achill: 5000 B.C. to 1900 A.D.: Archeology History Folklore, I.A.S. Publications [1992] Rosa Meehan: The Story of Mayo, Castlebar, 2003 James Carney: The Playboy & the Yellow lady, 1986 Poolbeg Hugo Hamilton: The Island of Talking, 2007 Kevin Barry: Beatlebone, 2015 Mealla Nī Ghiobúin: Dugort, Achill Island 1831–1861: The Rise and Fall of a Missionary Community, 2001 Patricia Byrne: The Veiled Woman of Achill – Island Outrage & A Playboy Drama, 2012 Mary J. Murphy: Achill's Eva O'Flaherty – Forgotten Island Heroine, 2011 Patricia Byrne: The Preacher and The Prelate – The Achill Mission Colony and The Battle for Souls in Famine Ireland, 2018 Mary J. Murphy, Achill Painters -An Island History, 2020 Michael Gallagher, Stick on Stone, 2013 In popular culture The island is featured throughout the film The Banshees of Inisherin in various locations on the island including Keem Bay, Cloughmore, and Purteen Pier. The film My Sailor My Love features Achill island. The island is the primary setting of the visual novel If Found.... See also Achillbeg Innisbiggle List of islands of County Mayo References External links Colaiste Pobail Acla students project on the Achill area Achill Island Maritime Archaeology Project VisitAchill multilingual visitor's site Islands of County Mayo Gaeltacht places in County Mayo	5
Irwin Allen Ginsberg (; June 3, 1926 – April 5, 1997) was an American poet and writer. As a student at Columbia University in the 1940s, he began friendships with Lucien Carr, William S. Burroughs and Jack Kerouac, forming the core of the Beat Generation. He vigorously opposed militarism, economic materialism, and sexual repression, and he embodied various aspects of this counterculture with his views on drugs, sex, multiculturalism, hostility to bureaucracy, and openness to Eastern religions. Best known for his poem "Howl", Ginsberg denounced what he saw as the destructive forces of capitalism and conformity in the United States. San Francisco police and US Customs seized copies of "Howl" in 1956, and a subsequent obscenity trial in 1957 attracted widespread publicity due to the poem's language and descriptions of heterosexual and homosexual sex at a time when sodomy laws made (male) homosexual acts a crime in every state. The poem reflected Ginsberg's own sexuality and his relationships with a number of men, including Peter Orlovsky, his lifelong partner. Judge Clayton W. Horn ruled that "Howl" was not obscene, asking: "Would there be any freedom of press or speech if one must reduce his vocabulary to vapid innocuous euphemisms?" Ginsberg was a Buddhist who extensively studied Eastern religious disciplines. He lived modestly, buying his clothing in second-hand stores and residing in apartments in New York City's East Village. One of his most influential teachers was Tibetan Buddhist Chögyam Trungpa, the founder of the Naropa Institute in Boulder, Colorado. At Trungpa's urging, Ginsberg and poet Anne Waldman started The Jack Kerouac School of Disembodied Poetics there in 1974. For decades, Ginsberg was active in political protests across a range of issues from the Vietnam War to the war on drugs. His poem "September on Jessore Road" drew attention to refugees fleeing the 1971 Bangladeshi genocide, exemplifying what literary critic Helen Vendler described as Ginsberg's persistent opposition to "imperial politics" and the "persecution of the powerless". His collection The Fall of America shared the annual National Book Award for Poetry in 1974. In 1979, he received the National Arts Club gold medal and was inducted into the American Academy of Arts and Letters. He was a Pulitzer Prize finalist in 1995 for his book Cosmopolitan Greetings: Poems 1986–1992. Biography Early life and family Ginsberg was born into a Jewish family in Newark, New Jersey, and grew up in nearby Paterson. He was the second son of Louis Ginsberg, also born in Newark, a schoolteacher and published poet, and the former Naomi Levy, born in Nevel (Russia) and a fervent Marxist. As a teenager, Ginsberg began to write letters to The New York Times about political issues, such as World War II and workers' rights. He published his first poems in the Paterson Morning Call. While in high school, Ginsberg became interested in the works of Walt Whitman, inspired by his teacher's passionate reading. In 1943, Ginsberg graduated from Eastside High School and briefly attended Montclair State College before entering Columbia University on a scholarship from the Young Men's Hebrew Association of Paterson. In 1945, he joined the Merchant Marine to earn money to continue his education at Columbia. While at Columbia, Ginsberg contributed to the Columbia Review literary journal, the Jester humor magazine, won the Woodberry Poetry Prize, served as president of the Philolexian Society (literary and debate group), and joined Boar's Head Society (poetry society). He was a resident of Hartley Hall, where other Beat Generation poets such as Jack Kerouac and Herbert Gold also lived. Ginsberg has stated that he considered his required freshman seminar in Great Books, taught by Lionel Trilling, to be his favorite Columbia course. According to The Poetry Foundation, Ginsberg spent several months in a mental institution after he pleaded insanity during a hearing. He was allegedly being prosecuted for harboring stolen goods in his dorm room. It was noted that the stolen property was not his, but belonged to an acquaintance. Ginsberg also took part in public readings at the Episcopal St. Mark's Church in-the-Bowery which would later hold a memorial service for him after his death. Relationship with his parents Ginsberg referred to his parents in a 1985 interview as "old-fashioned delicatessen philosophers". His mother was also an active member of the Communist Party and took Ginsberg and his brother Eugene to party meetings. Ginsberg later said that his mother "made up bedtime stories that all went something like: 'The good king rode forth from his castle, saw the suffering workers and healed them.'" Of his father Ginsberg said: "My father would go around the house either reciting Emily Dickinson and Longfellow under his breath or attacking T. S. Eliot for ruining poetry with his 'obscurantism.' I grew suspicious of both sides." Naomi Ginsberg had schizophrenia which often manifested as paranoid delusions, disordered thinking and multiple suicide attempts. She would claim, for example, that the president had implanted listening devices in their home and that her mother-in-law was trying to kill her. Her suspicion of those around her caused Naomi to draw closer to young Allen, "her little pet," as Bill Morgan says in his biography of Ginsberg, titled I Celebrate Myself: The Somewhat Private Life of Allen Ginsberg. She also tried to kill herself by slitting her wrists and was soon taken to Greystone, a mental hospital; she would spend much of Ginsberg's youth in mental hospitals. His experiences with his mother and her mental illness were a major inspiration for his two major works, "Howl" and his long autobiographical poem "Kaddish for Naomi Ginsberg (1894–1956)". When he was in junior high school, he accompanied his mother by bus to her therapist. The trip deeply disturbed Ginsberg—he mentioned it and other moments from his childhood in "Kaddish". His experiences with his mother's mental illness and her institutionalization are also frequently referred to in "Howl." For example, "Pilgrim State, Rockland, and Grey Stone's foetid halls" is a reference to institutions frequented by his mother and Carl Solomon, ostensibly the subject of the poem: Pilgrim State Hospital and Rockland State Hospital in New York and Greystone Park Psychiatric Hospital in New Jersey. This is followed soon by the line "with mother finally ******." Ginsberg later admitted the deletion was the expletive "fucked." He also says of Solomon in section three, "I'm with you in Rockland where you imitate the shade of my mother," once again showing the association between Solomon and his mother. Ginsberg received a letter from his mother after her death responding to a copy of "Howl" he had sent her. It admonished Ginsberg to be good and stay away from drugs; she says, "The key is in the window, the key is in the sunlight at the window—I have the key—Get married Allen don't take drugs—the key is in the bars, in the sunlight in the window." In a letter she wrote to Ginsberg's brother Eugene, she said, "God's informers come to my bed, and God himself I saw in the sky. The sunshine showed too, a key on the side of the window for me to get out. The yellow of the sunshine, also showed the key on the side of the window." These letters and the absence of a facility to recite kaddish inspired Ginsberg to write "Kaddish", which makes references to many details from Naomi's life, Ginsberg's experiences with her, and the letter, including the lines "the key is in the light" and "the key is in the window." New York Beats In Ginsberg's first year at Columbia he met fellow undergraduate Lucien Carr, who introduced him to a number of future Beat writers, including Jack Kerouac, William S. Burroughs, and John Clellon Holmes. They bonded, because they saw in one another an excitement about the potential of American youth, a potential that existed outside the strict conformist confines of post–World War II, McCarthy-era America. Ginsberg and Carr talked excitedly about a "New Vision" (a phrase adapted from Yeats' "A Vision"), for literature and America. Carr also introduced Ginsberg to Neal Cassady, for whom Ginsberg had a long infatuation. In the first chapter of his 1957 novel On the Road Kerouac described the meeting between Ginsberg and Cassady. Kerouac saw them as the dark (Ginsberg) and light (Cassady) side of their "New Vision", a perception stemming partly from Ginsberg's association with communism, of which Kerouac had become increasingly distrustful. Though Ginsberg was never a member of the Communist Party, Kerouac named him "Carlo Marx" in On the Road. This was a source of strain in their relationship. Also, in New York, Ginsberg met Gregory Corso in the Pony Stable Bar. Corso, recently released from prison, was supported by the Pony Stable patrons and was writing poetry there the night of their meeting. Ginsberg claims he was immediately attracted to Corso, who was straight, but understood homosexuality after three years in prison. Ginsberg was even more struck by reading Corso's poems, realizing Corso was "spiritually gifted." Ginsberg introduced Corso to the rest of his inner circle. In their first meeting at the Pony Stable, Corso showed Ginsberg a poem about a woman who lived across the street from him and sunbathed naked in the window. Amazingly, the woman happened to be Ginsberg's girlfriend that he was living with during one of his forays into heterosexuality. Ginsberg took Corso over to their apartment. There the woman proposed sex with Corso, who was still very young and fled in fear. Ginsberg introduced Corso to Kerouac and Burroughs and they began to travel together. Ginsberg and Corso remained lifelong friends and collaborators. Shortly after this period in Ginsberg's life, he became romantically involved with Elise Nada Cowen after meeting her through Alex Greer, a philosophy professor at Barnard College whom she had dated for a while during the burgeoning Beat generation's period of development. As a Barnard student, Elise Cowen extensively read the poetry of Ezra Pound and T. S. Eliot, when she met Joyce Johnson and Leo Skir, among other Beat players. As Cowen had felt a strong attraction to darker poetry most of the time, Beat poetry seemed to provide an allure to what suggests a shadowy side of her persona. While at Barnard, Cowen earned the nickname "Beat Alice" as she had joined a small group of anti-establishment artists and visionaries known to outsiders as beatniks, and one of her first acquaintances at the college was the beat poet Joyce Johnson who later portrayed Cowen in her books, including "Minor Characters" and Come and Join the Dance, which expressed the two women's experiences in the Barnard and Columbia Beat community. Through his association with Elise Cowen, Ginsberg discovered that they shared a mutual friend, Carl Solomon, to whom he later dedicated his most famous poem "Howl." This poem is considered an autobiography of Ginsberg up to 1955, and a brief history of the Beat Generation through its references to his relationship to other Beat artists of that time. The "Blake vision" In 1948, in an apartment in East Harlem, Ginsberg experienced an auditory hallucination while masturbating and reading the poetry of William Blake, which he later referred to as his "Blake vision". Ginsberg claimed to have heard the voice of God—also described as the "voice of the Ancient of Days"—or of Blake himself reading "Ah! Sun-flower", "The Sick Rose" and "The Little Girl Lost". The experience lasted several days, with him believing that he had witnessed the interconnectedness of the universe; Ginsberg recounted that after looking at latticework on the fire escape of the apartment and then at the sky, he intuited that one had been crafted by human beings, while the other had been crafted by itself. He explained that this hallucination was not inspired by drug use, but said he sought to recapture the feeling of interconnectedness later with various drugs. San Francisco Renaissance Ginsberg moved to San Francisco during the 1950s. Before Howl and Other Poems was published in 1956 by City Lights, he worked as a market researcher. In 1954, in San Francisco, Ginsberg met Peter Orlovsky (1933–2010), with whom he fell in love and who remained his lifelong partner. Selections from their correspondence have been published. Also in San Francisco, Ginsberg met members of the San Francisco Renaissance (James Broughton, Robert Duncan, Madeline Gleason and Kenneth Rexroth) and other poets who would later be associated with the Beat Generation in a broader sense. Ginsberg's mentor William Carlos Williams wrote an introductory letter to San Francisco Renaissance figurehead Kenneth Rexroth, who then introduced Ginsberg into the San Francisco poetry scene. There, Ginsberg also met three budding poets and Zen enthusiasts who had become friends at Reed College: Gary Snyder, Philip Whalen, and Lew Welch. In 1959, along with poets John Kelly, Bob Kaufman, A. D. Winans, and William Margolis, Ginsberg was one of the founders of the Beatitude poetry magazine. Wally Hedrick—a painter and co-founder of the Six Gallery—approached Ginsberg in mid-1955 and asked him to organize a poetry reading at the Six Gallery. At first, Ginsberg refused, but once he had written a rough draft of "Howl," he changed his "fucking mind," as he put it. Ginsberg advertised the event as "Six Poets at the Six Gallery." One of the most important events in Beat mythos, known simply as "The Six Gallery reading" took place on October 7, 1955. The event, in essence, brought together the East and West Coast factions of the Beat Generation. Of more personal significance to Ginsberg, the reading that night included the first public presentation of "Howl," a poem that brought worldwide fame to Ginsberg and to many of the poets associated with him. An account of that night can be found in Kerouac's novel The Dharma Bums, describing how change was collected from audience members to buy jugs of wine, and Ginsberg reading passionately, drunken, with arms outstretched. Ginsberg's principal work, "Howl," is well known for its opening line: "I saw the best minds of my generation destroyed by madness, starving hysterical naked [...]." "Howl" was considered scandalous at the time of its publication, because of the rawness of its language. Shortly after its 1956 publication by San Francisco's City Lights Bookstore, it was banned for obscenity. The ban became a cause célèbre among defenders of the First Amendment, and was later lifted, after Judge Clayton W. Horn declared the poem to possess redeeming artistic value. Ginsberg and Shig Murao, the City Lights manager who was jailed for selling "Howl," became lifelong friends. Biographical references in "Howl" Ginsberg claimed at one point that all of his work was an extended biography (like Kerouac's Duluoz Legend). "Howl" is not only a biography of Ginsberg's experiences before 1955, but also a history of the Beat Generation. Ginsberg also later claimed that at the core of "Howl" were his unresolved emotions about his schizophrenic mother. Though "Kaddish" deals more explicitly with his mother, "Howl" in many ways is driven by the same emotions. "Howl" chronicles the development of many important friendships throughout Ginsberg's life. He begins the poem with "I saw the best minds of my generation destroyed by madness", which sets the stage for Ginsberg to describe Cassady and Solomon, immortalizing them into American literature. This madness was the "angry fix" that society needed to function—madness was its disease. In the poem, Ginsberg focused on "Carl Solomon! I'm with you in Rockland", and, thus, turned Solomon into an archetypal figure searching for freedom from his "straightjacket". Though references in most of his poetry reveal much about his biography, his relationship to other members of the Beat Generation, and his own political views, "Howl," his most famous poem, is still perhaps the best place to start. To Paris and the "Beat Hotel", Tangier and India In 1957, Ginsberg surprised the literary world by abandoning San Francisco. After a spell in Morocco, he and Peter Orlovsky joined Gregory Corso in Paris. Corso introduced them to a shabby lodging house above a bar at 9 rue Gît-le-Cœur that was to become known as the Beat Hotel. They were soon joined by Burroughs and others. It was a productive, creative time for all of them. There, Ginsberg began his epic poem "Kaddish", Corso composed Bomb and Marriage, and Burroughs (with help from Ginsberg and Corso) put together Naked Lunch from previous writings. This period was documented by the photographer Harold Chapman, who moved in at about the same time, and took pictures constantly of the residents of the "hotel" until it closed in 1963. During 1962–1963, Ginsberg and Orlovsky travelled extensively across India, living half a year at a time in Calcutta (now Kolkata) and Benares (Varanasi). On his road to India he stayed two months in Athens ( August 29, 1961 - October 31, 1961) where he visited various cites such as Delphi, Mycines, Crete, and then he continued his journey to Israel, Kenya and finally India. Also during this time, he formed friendships with some of the prominent young Bengali poets of the time including Shakti Chattopadhyay and Sunil Gangopadhyay. Ginsberg had several political connections in India; most notably Pupul Jayakar who helped him extend his stay in India when the authorities were eager to expel him. England and the International Poetry Incarnation In May 1965, Ginsberg arrived in London, and offered to read anywhere for free. Shortly after his arrival, he gave a reading at Better Books, which was described by Jeff Nuttall as "the first healing wind on a very parched collective mind." Tom McGrath wrote: "This could well turn out to have been a very significant moment in the history of England—or at least in the history of English Poetry." Soon after the bookshop reading, plans were hatched for the International Poetry Incarnation, which was held at the Royal Albert Hall in London on June 11, 1965. The event attracted an audience of 7,000, who heard readings and live and tape performances by a wide variety of figures, including Ginsberg, Adrian Mitchell, Alexander Trocchi, Harry Fainlight, Anselm Hollo, Christopher Logue, George MacBeth, Gregory Corso, Lawrence Ferlinghetti, Michael Horovitz, Simon Vinkenoog, Spike Hawkins and Tom McGrath. The event was organized by Ginsberg's friend, the filmmaker Barbara Rubin. Peter Whitehead documented the event on film and released it as Wholly Communion. A book featuring images from the film and some of the poems that were performed was also published under the same title by Lorrimer in the UK and Grove Press in US. Continuing literary activity Though the term "Beat" is most accurately applied to Ginsberg and his closest friends (Corso, Orlovsky, Kerouac, Burroughs, etc.), the term "Beat Generation" has become associated with many of the other poets Ginsberg met and became friends with in the late 1950s and early 1960s. A key feature of this term seems to be a friendship with Ginsberg. Friendship with Kerouac or Burroughs might also apply, but both writers later strove to disassociate themselves from the name "Beat Generation." Part of their dissatisfaction with the term came from the mistaken identification of Ginsberg as the leader. Ginsberg never claimed to be the leader of a movement. He claimed that many of the writers with whom he had become friends in this period shared many of the same intentions and themes. Some of these friends include: David Amram, Bob Kaufman; Diane di Prima; Jim Cohn; poets associated with the Black Mountain College such as Charles Olson, Robert Creeley, and Denise Levertov; poets associated with the New York School such as Frank O'Hara and Kenneth Koch. LeRoi Jones before he became Amiri Baraka, who, after reading "Howl", wrote a letter to Ginsberg on a sheet of toilet paper. Baraka's independent publishing house Totem Press published Ginsberg's early work. Through a party organized by Baraka, Ginsberg was introduced to Langston Hughes while Ornette Coleman played saxophone. Later in his life, Ginsberg formed a bridge between the beat movement of the 1950s and the hippies of the 1960s, befriending, among others, Timothy Leary, Ken Kesey, Hunter S. Thompson, and Bob Dylan. Ginsberg gave his last public reading at Booksmith, a bookstore in the Haight-Ashbury neighborhood of San Francisco, a few months before his death. In 1993, Ginsberg visited the University of Maine at Orono to pay homage to the 90-year-old great Carl Rakosi. Buddhism and Krishna In 1950, Kerouac began studying Buddhism and shared what he learned from Dwight Goddard's Buddhist Bible with Ginsberg. Ginsberg first heard about the Four Noble Truths and such sutras as the Diamond Sutra at this time. Ginsberg's spiritual journey began early on with his spontaneous visions, and continued with an early trip to India with Gary Snyder. Snyder had previously spent time in Kyoto to study at the First Zen Institute at Daitoku-ji Monastery. At one point, Snyder chanted the Prajnaparamita, which in Ginsberg's words "blew my mind." His interest piqued, Ginsberg traveled to meet the Dalai Lama as well as the Karmapa at Rumtek Monastery. Continuing on his journey, Ginsberg met Dudjom Rinpoche in Kalimpong, who taught him: "If you see something horrible, don't cling to it, and if you see something beautiful, don't cling to it." After returning to the United States, a chance encounter on a New York City street with Chögyam Trungpa Rinpoche (they both tried to catch the same cab), a Kagyu and Nyingma Tibetan Buddhist master, led to Trungpa becoming his friend and lifelong teacher. Ginsberg helped Trungpa and New York poet Anne Waldman in founding the Jack Kerouac School of Disembodied Poetics at Naropa University in Boulder, Colorado. Ginsberg was also involved with Krishnaism. He had started incorporating chanting the Hare Krishna mantra into his religious practice in the mid-1960s. After learning that A. C. Bhaktivedanta Swami Prabhupada, the founder of the Hare Krishna movement in the Western world had rented a store front in New York, he befriended him, visiting him often and suggesting publishers for his books, and a fruitful relationship began. This relationship is documented by Satsvarupa dasa Goswami in his biographical account Srila Prabhupada Lilamrta. Ginsberg donated money, materials, and his reputation to help the Swami establish the first temple, and toured with him to promote his cause. Despite disagreeing with many of Bhaktivedanta Swami's required prohibitions, Ginsberg often sang the Hare Krishna mantra publicly as part of his philosophy and declared that it brought a state of ecstasy. He was glad that Bhaktivedanta Swami, an authentic swami from India, was now trying to spread the chanting in America. Along with other counterculture ideologists like Timothy Leary, Gary Snyder, and Alan Watts, Ginsberg hoped to incorporate Bhaktivedanta Swami and his chanting into the hippie movement, and agreed to take part in the Mantra-Rock Dance concert and to introduce the swami to the Haight-Ashbury hippie community. On January 17, 1967, Ginsberg helped plan and organize a reception for Bhaktivedanta Swami at San Francisco International Airport, where fifty to a hundred hippies greeted the Swami, chanting Hare Krishna in the airport lounge with flowers in hands. To further support and promote Bhaktivendata Swami's message and chanting in San Francisco, Allen Ginsberg agreed to attend the Mantra-Rock Dance, a musical event 1967 held at the Avalon Ballroom by the San Francisco Hare Krishna temple. It featured some leading rock bands of the time: Big Brother and the Holding Company with Janis Joplin, the Grateful Dead, and Moby Grape, who performed there along with the Hare Krishna founder Bhaktivedanta Swami and donated proceeds to the Krishna temple. Ginsberg introduced Bhaktivedanta Swami to some three thousand hippies in the audience and led the chanting of the Hare Krishna mantra. Music and chanting were both important parts of Ginsberg's live delivery during poetry readings. He often accompanied himself on a harmonium, and was often accompanied by a guitarist. It is believed that the Hindi and Buddhist poet Nagarjun had introduced Ginsberg to the harmonium in Banaras. According to Malay Roy Choudhury, Ginsberg refined his practice while learning from his relatives, including his cousin Savitri Banerjee. When Ginsberg asked if he could sing a song in praise of Lord Krishna on William F. Buckley, Jr.'s TV show Firing Line on September 3, 1968, Buckley acceded and the poet chanted slowly as he played dolefully on a harmonium. According to Richard Brookhiser, an associate of Buckley's, the host commented that it was "the most unharried Krishna I've ever heard." At the 1967 Human Be-In in San Francisco's Golden Gate Park, the 1968 Democratic National Convention in Chicago, and the 1970 Black Panther rally at Yale campus Allen chanted "Om" repeatedly over a sound system for hours on end. Ginsberg further brought mantras into the world of rock and roll when he recited the Heart Sutra in the song "Ghetto Defendant." The song appears on the 1982 album Combat Rock by British first wave punk band The Clash. Ginsberg came in touch with the Hungryalist poets of Bengal, especially Malay Roy Choudhury, who introduced Ginsberg to the three fish with one head of Indian emperor Jalaluddin Mohammad Akbar. The three fish symbolised coexistence of all thought, philosophy, and religion. In spite of Ginsberg's attraction to Eastern religions, the journalist Jane Kramer argues that he, like Whitman, adhered to an "American brand of mysticism" that was "rooted in humanism and in a romantic and visionary ideal of harmony among men." The Allen Ginsberg Estate and Jewel Heart International partnered to present "Transforming Minds: Kyabje Gelek Rimpoche and Friends", a gallery and online exhibition of images of Gelek Rimpoche by Allen Ginsberg, a student with whom he had an "indissoluble bond," in 2021 at Tibet House US in New York City. Fifty negatives from Ginsberg's Stanford University photo archive celebrated "the unique relationship between Allen and Rimpoche." The selection of never-before presented images, featuring great Tibetan masters including the Dalai Lama, Tibetologists, and students were "guided by Allen's extensive notes on the contact sheets and images he'd circled with the intention to print." Illness and death In 1960, he was treated for a tropical disease, and it is speculated that he contracted hepatitis from an unsterilized needle administered by a doctor, which played a role in his death 37 years later. Ginsberg was a lifelong smoker, and though he tried to quit for health and religious reasons, his busy schedule in later life made it difficult, and he always returned to smoking. In the 1970s, Ginsberg had two minor strokes which were first diagnosed as Bell's palsy, which gave him significant paralysis and stroke-like drooping of the muscles in one side of his face. Later in life, he also had constant minor ailments such as high blood pressure. Many of these symptoms were related to stress, but he never slowed down his schedule. Ginsberg won a 1974 National Book Award for The Fall of America (split with Adrienne Rich, Diving into the Wreck). In 1986, Ginsberg was awarded the Golden Wreath by the Struga Poetry Evenings International Festival in Macedonia, the second American poet to be so awarded since W. H. Auden. At Struga, Ginsberg met with the other Golden Wreath winners, Bulat Okudzhava and Andrei Voznesensky. In 1989, Ginsberg appeared in Rosa von Praunheim's award-winning film Silence = Death about the fight of gay artists in New York City for AIDS-education and the rights of HIV infected people. In 1993, the French Minister of Culture appointed Ginsberg a Chevalier des Arts et des Lettres. Ginsberg continued to help his friends as much as he could: he gave money to Herbert Huncke out of his own pocket, regularly supplied neighbor Arthur Russell with an extension cord to power his home recording setup, and housed a broke, drug-addicted Harry Smith. With the exception of a special guest appearance at the NYU Poetry Slam on February 20, 1997, Ginsberg gave what is thought to be his last reading at The Booksmith in San Francisco on December 16, 1996. After returning home from the hospital for the last time, where he had been unsuccessfully treated for congestive heart failure, Ginsberg continued making phone calls to say goodbye to nearly everyone in his address book. Some of the phone calls were sad and interrupted by crying, and others were joyous and optimistic. Ginsberg continued to write through his final illness, with his last poem, "Things I'll Not Do (Nostalgias)", written on March 30. He died on April 5, 1997, surrounded by family and friends in his East Village loft in Manhattan, succumbing to liver cancer via complications of hepatitis at the age of 70. Gregory Corso, Roy Lichtenstein, Patti Smith and others came by to pay their respects. He was cremated, and his ashes were buried in his family plot in Gomel Chesed Cemetery in Newark. He was survived by Orlovsky. In 1998, various writers, including Catfish McDaris read at a gathering at Ginsberg's farm to honor Allen and the Beats. Good Will Hunting (released in December 1997) was dedicated to Ginsberg, as well as Burroughs, who died four months later. Social and political activism Free speech Ginsberg's willingness to talk about taboo subjects made him a controversial figure during the conservative 1950s, and a significant figure in the 1960s. In the mid-1950s, no reputable publishing company would even consider publishing Howl. At the time, such "sex talk" employed in Howl was considered by some to be vulgar or even a form of pornography, and could be prosecuted under law. Ginsberg used phrases such as "cocksucker", "fucked in the ass", and "cunt" as part of the poem's depiction of different aspects of American culture. Numerous books that discussed sex were banned at the time, including Lady Chatterley's Lover. The sex that Ginsberg described did not portray the sex between heterosexual married couples, or even longtime lovers. Instead, Ginsberg portrayed casual sex. For example, in Howl, Ginsberg praises the man "who sweetened the snatches of a million girls." Ginsberg used gritty descriptions and explicit sexual language, pointing out the man "who lounged hungry and lonesome through Houston seeking jazz or sex or soup." In his poetry, Ginsberg also discussed the then-taboo topic of homosexuality. The explicit sexual language that filled Howl eventually led to an important trial on First Amendment issues. Ginsberg's publisher was brought up on charges for publishing pornography, and the outcome led to a judge going on record dismissing charges, because the poem carried "redeeming social importance," thus setting an important legal precedent. Ginsberg continued to broach controversial subjects throughout the 1970s, 1980s, and 1990s. From 1970 to 1996, Ginsberg had a long-term affiliation with PEN American Center with efforts to defend free expression. When explaining how he approached controversial topics, he often pointed to Herbert Huncke: he said that when he first got to know Huncke in the 1940s, Ginsberg saw that he was sick from his heroin addiction, but at the time heroin was a taboo subject and Huncke was left with nowhere to go for help. Role in Vietnam War protests Ginsberg was a signer of the anti-war manifesto "A Call to Resist Illegitimate Authority", circulated among draft resistors in 1967 by members of the radical intellectual collective RESIST. Other signers and RESIST members included Mitchell Goodman, Henry Braun, Denise Levertov, Noam Chomsky, William Sloane Coffin, Dwight Macdonald, Robert Lowell, and Norman Mailer. In 1968, Ginsberg signed the "Writers and Editors War Tax Protest" pledge, vowing to refuse tax payments in protest against the Vietnam War, and later became a sponsor of the War Tax Resistance project, which practiced and advocated tax resistance as a form of anti-war protest. He was present the night of the Tompkins Square Park riot (1988) and provided an eyewitness account to The New York Times. Relationship to communism Ginsberg talked openly about his connections with communism and his admiration for past communist heroes and the labor movement at a time when the Red Scare and McCarthyism were still raging. He admired Fidel Castro and many other Marxist figures from the 20th century. In "America" (1956), Ginsberg writes: "America, I used to be a communist when I was a kid I'm not sorry". Biographer Jonah Raskin has claimed that, despite his often stark opposition to communist orthodoxy, Ginsberg held "his own idiosyncratic version of communism." On the other hand, when Donald Manes, a New York City politician, publicly accused Ginsberg of being a member of the Communist Party, Ginsberg objected: "I am not, as a matter of fact, a member of the Communist party, nor am I dedicated to the overthrow of the U.S. government or any government by violence ... I must say that I see little difference between the armed and violent governments both Communist and Capitalist that I have observed". Ginsberg travelled to several communist countries to promote free speech. He claimed that communist countries, such as China, welcomed him because they thought he was an enemy of capitalism, but often turned against him when they saw him as a troublemaker. For example, in 1965 Ginsberg was deported from Cuba for publicly protesting the persecution of homosexuals. The Cubans sent him to Czechoslovakia, where one week after being named the Král majálesu ("King of May", a students' festivity, celebrating spring and student life), Ginsberg was arrested for alleged drug use and public drunkenness, and the security agency StB confiscated several of his writings, which they considered to be lewd and morally dangerous. Ginsberg was then deported from Czechoslovakia on May 7, 1965, by order of the StB. Václav Havel points to Ginsberg as an important inspiration. Gay rights One contribution that is often considered his most significant and most controversial was his openness about homosexuality. Ginsberg was an early proponent of freedom for gay people. In 1943, he discovered within himself "mountains of homosexuality." He expressed this desire openly and graphically in his poetry. He also struck a note for gay marriage by listing Peter Orlovsky, his lifelong companion, as his spouse in his Who's Who entry. Subsequent gay writers saw his frank talk about homosexuality as an opening to speak more openly and honestly about something often before only hinted at or spoken of in metaphor. In writing about sexuality in graphic detail and in his frequent use of language seen as indecent, he challenged—and ultimately changed—obscenity laws. He was a staunch supporter of others whose expression challenged obscenity laws (William S. Burroughs and Lenny Bruce, for example). Association with NAMBLA Ginsberg was a supporter and member of the North American Man/Boy Love Association (NAMBLA), a pedophilia and pederasty advocacy organization in the United States that works to abolish age of consent laws and legalize sexual relations between adults and children. Saying that he joined the organization "in defense of free speech", Ginsberg stated: "Attacks on NAMBLA stink of politics, witchhunting for profit, humorlessness, vanity, anger and ignorance ... I'm a member of NAMBLA because I love boys too—everybody does, who has a little humanity". In 1994, Ginsberg appeared in a documentary on NAMBLA called Chicken Hawk: Men Who Love Boys (playing on the gay male slang term "Chickenhawk"), in which he read a "graphic ode to youth". He read his poem "Sweet Boy, Gimme Yr Ass" from the book Mind Breaths. In her 2002 book Heartbreak, Andrea Dworkin claimed Ginsberg had ulterior motives for allying with NAMBLA. In reference to his onetime friend Dworkin, Ginsberg stated: Demystification of drugs Ginsberg talked often about drug use. He organized the New York City chapter of LeMar (Legalize Marijuana). Throughout the 1960s he took an active role in the demystification of LSD, and, with Timothy Leary, worked to promote its common use. He remained for many decades an advocate of marijuana legalization, and, at the same time, warned his audiences against the hazards of tobacco in his Put Down Your Cigarette Rag (Don't Smoke): "Don't Smoke Don't Smoke Nicotine Nicotine No / No don't smoke the official Dope Smoke Dope Dope." CIA drug trafficking Ginsberg worked closely with Alfred W. McCoy on the latter's book The Politics of Heroin in Southeast Asia, which claimed that the CIA was knowingly involved in the production of heroin in the Golden Triangle of Burma, Thailand, and Laos. In addition to working with McCoy, Ginsberg personally confronted Richard Helms, the director of the CIA in the 1970s, about the matter, but Helms denied that the CIA had anything to do with selling illegal drugs. Ginsberg wrote many essays and articles, researching and compiling evidence of the CIA's alleged involvement in drug trafficking, but it took ten years, and the publication of McCoy's book in 1972, before anyone took him seriously. In 1978, Ginsberg received a note from the chief editor of The New York Times, apologizing for not having taken his allegations seriously. The political subject is dealt with in his song/poem "CIA Dope calypso". The United States Department of State responded to McCoy's initial allegations stating that they were "unable to find any evidence to substantiate them, much less proof." Subsequent investigations by the Inspector General of the CIA, United States House Committee on Foreign Affairs, and United States Senate Select Committee to Study Governmental Operations with Respect to Intelligence Activities, a.k.a. the Church Committee, also found the charges to be unsubstantiated. Work Most of Ginsberg's very early poetry was written in formal rhyme and meter like that of his father, and of his idol William Blake. His admiration for the writing of Jack Kerouac inspired him to take poetry more seriously. In 1955, upon the advice of a psychiatrist, Ginsberg dropped out of the working world to devote his entire life to poetry. Soon after, he wrote Howl, the poem that brought him and his Beat Generation contemporaries to national attention and allowed him to live as a professional poet for the rest of his life. Later in life, Ginsberg entered academia, teaching poetry as Distinguished Professor of English at Brooklyn College from 1986 until his death. Inspiration from friends Ginsberg claimed throughout his life that his biggest inspiration was Kerouac's concept of "spontaneous prose." He believed literature should come from the soul without conscious restrictions. Ginsberg was much more prone to revise than Kerouac. For example, when Kerouac saw the first draft of Howl, he disliked the fact that Ginsberg had made editorial changes in pencil (transposing "negro" and "angry" in the first line, for example). Kerouac only wrote out his concepts of spontaneous prose at Ginsberg's insistence because Ginsberg wanted to learn how to apply the technique to his poetry. The inspiration for Howl was Ginsberg's friend, Carl Solomon, and Howl is dedicated to him. Solomon was a Dada and Surrealism enthusiast (he introduced Ginsberg to Artaud) who had bouts of clinical depression. Solomon wanted to commit suicide, but he thought a form of suicide appropriate to dadaism would be to go to a mental institution and demand a lobotomy. The institution refused, giving him many forms of therapy, including electroshock therapy. Much of the final section of the first part of Howl is a description of this. Ginsberg used Solomon as an example of all those ground down by the machine of "Moloch." Moloch, to whom the second section is addressed, is a Levantine god to whom children were sacrificed. Ginsberg may have gotten the name from the Kenneth Rexroth poem "Thou Shalt Not Kill," a poem about the death of one of Ginsberg's heroes, Dylan Thomas. Moloch is mentioned a few times in the Torah and references to Ginsberg's Jewish background are frequent in his work. Ginsberg said the image of Moloch was inspired by peyote visions he had of the Francis Drake Hotel in San Francisco which appeared to him as a skull; he took it as a symbol of the city (not specifically San Francisco, but all cities). Ginsberg later acknowledged in various publications and interviews that behind the visions of the Francis Drake Hotel were memories of the Moloch of Fritz Lang's film Metropolis (1927) and of the woodcut novels of Lynd Ward. Moloch has subsequently been interpreted as any system of control, including the conformist society of post-World War II America, focused on material gain, which Ginsberg frequently blamed for the destruction of all those outside of societal norms. He also made sure to emphasize that Moloch is a part of humanity in multiple aspects, in that the decision to defy socially created systems of control—and therefore go against Moloch—is a form of self-destruction. Many of the characters Ginsberg references in Howl, such as Neal Cassady and Herbert Huncke, destroyed themselves through excessive substance abuse or a generally wild lifestyle. The personal aspects of Howl are perhaps as important as the political aspects. Carl Solomon, the prime example of a "best mind" destroyed by defying society, is associated with Ginsberg's schizophrenic mother: the line "with mother finally fucked" comes after a long section about Carl Solomon, and in Part III, Ginsberg says: "I'm with you in Rockland where you imitate the shade of my mother." Ginsberg later admitted that the drive to write Howl was fueled by sympathy for his ailing mother, an issue which he was not yet ready to deal with directly. He dealt with it directly with 1959's Kaddish, which had its first public reading at a Catholic Worker Friday Night meeting, possibly due to its associations with Thomas Merton. Inspiration from mentors and idols Ginsberg's poetry was strongly influenced by Modernism (most importantly the American style of Modernism pioneered by William Carlos Williams), Romanticism (specifically William Blake and John Keats), the beat and cadence of jazz (specifically that of bop musicians such as Charlie Parker), and his Kagyu Buddhist practice and Jewish background. He considered himself to have inherited the visionary poetic mantle handed down from the English poet and artist William Blake, the American poet Walt Whitman and the Spanish poet Federico García Lorca. The power of Ginsberg's verse, its searching, probing focus, its long and lilting lines, as well as its New World exuberance, all echo the continuity of inspiration that he claimed. He corresponded with William Carlos Williams, who was then in the middle of writing his epic poem Paterson about the industrial city near his home. After attending a reading by Williams, Ginsberg sent the older poet several of his poems and wrote an introductory letter. Most of these early poems were rhymed and metered and included archaic pronouns like "thee." Williams disliked the poems and told Ginsberg, "In this mode perfection is basic, and these poems are not perfect." Though he disliked these early poems, Williams loved the exuberance in Ginsberg's letter. He included the letter in a later part of Paterson. He encouraged Ginsberg not to emulate the old masters, but to speak with his own voice and the voice of the common American. From Williams, Ginsberg learned to focus on strong visual images, in line with Williams' own motto "No ideas but in things." Studying Williams' style led to a tremendous shift from the early formalist work to a loose, colloquial free verse style. Early breakthrough poems include Bricklayer's Lunch Hour and Dream Record. Carl Solomon introduced Ginsberg to the work of Antonin Artaud (To Have Done with the Judgement of God and Van Gogh: The Man Suicided by Society), and Jean Genet (Our Lady of the Flowers). Philip Lamantia introduced him to other Surrealists and Surrealism continued to be an influence (for example, sections of "Kaddish" were inspired by André Breton's Free Union). Ginsberg claimed that the anaphoric repetition of Howl and other poems was inspired by Christopher Smart in such poems as Jubilate Agno. Ginsberg also claimed other more traditional influences, such as: Franz Kafka, Herman Melville, Fyodor Dostoevsky, Edgar Allan Poe, and Emily Dickinson. Ginsberg also made an intense study of haiku and the paintings of Paul Cézanne, from which he adapted a concept important to his work, which he called the Eyeball Kick. He noticed in viewing Cézanne's paintings that when the eye moved from one color to a contrasting color, the eye would spasm, or "kick." Likewise, he discovered that the contrast of two seeming opposites was a common feature in haiku. Ginsberg used this technique in his poetry, putting together two starkly dissimilar images: something weak with something strong, an artifact of high culture with an artifact of low culture, something holy with something unholy. The example Ginsberg most often used was "hydrogen jukebox" (which later became the title of a song cycle composed by Philip Glass with lyrics drawn from Ginsberg's poems). Another example is Ginsberg's observation on Bob Dylan during Dylan's hectic and intense 1966 electric-guitar tour, fueled by a cocktail of amphetamines, opiates, alcohol, and psychedelics, as a Dexedrine Clown. The phrases "eyeball kick" and "hydrogen jukebox" both show up in Howl, as well as a direct quote from Cézanne: "Pater Omnipotens Aeterna Deus". Inspiration from music Allen Ginsberg also found inspiration in music. He frequently included music in his poetry, invariably composing his tunes on an old Indian harmonium, which he often played during his readings. He wrote and recorded music to accompany William Blake's Songs of Innocence and Songs of Experience. He also recorded a handful of other albums. To create music for Howl and Wichita Vortex Sutra, he worked with the minimalist composer, Philip Glass. Ginsberg worked with, drew inspiration from, and inspired artists such as Bob Dylan, The Clash, Patti Smith, Phil Ochs, and The Fugs. He worked with Dylan on various projects and maintained a friendship with him over many years. In 1981, Ginsberg recorded a song called "Birdbrain." He was backed by the Gluons, and the track was released as a single. In 1996, he recorded a song co-written with Paul McCartney and Philip Glass, "The Ballad of the Skeletons", which reached number 8 on the Triple J Hottest 100 for that year. Style and technique From the study of his idols and mentors and the inspiration of his friends—not to mention his own experiments—Ginsberg developed an individualistic style that's easily identified as Ginsbergian. Ginsberg stated that Whitman's long line was a dynamic technique few other poets had ventured to develop further, and Whitman is also often compared to Ginsberg because their poetry sexualized aspects of the male form. Many of Ginsberg's early long line experiments contain some sort of anaphora, repetition of a "fixed base" (for example "who" in Howl, "America" in America) and this has become a recognizable feature of Ginsberg's style. He said later this was a crutch because he lacked confidence; he did not yet trust "free flight." In the 1960s, after employing it in some sections of Kaddish ("caw" for example) he, for the most part, abandoned the anaphoric form. 'Latter-Day Beat' Bob Dylan is known for using anaphora, as in 'Tangled Up in Blue' where the phrase, returned to at the end of every verse, takes the place of a chorus. Several of his earlier experiments with methods for formatting poems as a whole became regular aspects of his style in later poems. In the original draft of Howl, each line is in a "stepped triadic" format reminiscent of William Carlos Williams. He abandoned the "stepped triadic" when he developed his long line although the stepped lines showed up later, most significantly in the travelogues of The Fall of America. Howl and Kaddish, arguably his two most important poems, are both organized as an inverted pyramid, with larger sections leading to smaller sections. In America, he also experimented with a mix of longer and shorter lines. Ginsberg's mature style made use of many specific, highly developed techniques, which he expressed in the "poetic slogans" he used in his Naropa teaching. Prominent among these was the inclusion of his unedited mental associations so as to reveal the mind at work ("First thought, best thought." "Mind is shapely, thought is shapely.") He preferred expression through carefully observed physical details rather than abstract statements ("Show, don't tell." "No ideas but in things.") In these he carried on and developed traditions of modernism in writing that are also found in Kerouac and Whitman. In Howl and in his other poetry, Ginsberg drew inspiration from the epic, free verse style of the 19th-century American poet Walt Whitman. Both wrote passionately about the promise (and betrayal) of American democracy, the central importance of erotic experience, and the spiritual quest for the truth of everyday existence. J. D. McClatchy, editor of the Yale Review, called Ginsberg "the best-known American poet of his generation, as much a social force as a literary phenomenon." McClatchy added that Ginsberg, like Whitman, "was a bard in the old manner—outsized, darkly prophetic, part exuberance, part prayer, part rant. His work is finally a history of our era's psyche, with all its contradictory urges." McClatchy's barbed eulogies define the essential difference between Ginsberg ("a beat poet whose writing was [...] journalism raised by combining the recycling genius with a generous mimic-empathy, to strike audience-accessible chords; always lyrical and sometimes truly poetic") and Kerouac ("a poet of singular brilliance, the brightest luminary of a 'beat generation' he came to symbolise in popular culture [...] [though] in reality he far surpassed his contemporaries [...] Kerouac is an originating genius, exploring then answering—like Rimbaud a century earlier, by necessity more than by choice—the demands of authentic self-expression as applied to the evolving quicksilver mind of America's only literary virtuoso [...]"). Bibliography Howl and Other Poems (1956), Kaddish and Other Poems (1961), Empty Mirror: Early Poems (1961), Reality Sandwiches (1963), The Yage Letters (1963)with William S. Burroughs Planet News (1968), Indian Journals (1970), First Blues: Rags, Ballads & Harmonium Songs 1971 - 1974 (1975), The Gates of Wrath: Rhymed Poems 1948–1951 (1972), The Fall of America: Poems of These States (1973), Iron Horse (1973) Allen Verbatim: Lectures on Poetry, Politics, Consciousness by Allen Ginsberg (1974), edited by Gordon Ball, Sad Dust Glories: poems during work summer in woods (1975) Mind Breaths (1978), Plutonian Ode: Poems 1977–1980 (1981), Collected Poems 1947–1980 (1984), . Republished with later material added as Collected Poems 1947-1997, New York, HarperCollins, 2006 White Shroud Poems: 1980–1985 (1986), Cosmopolitan Greetings Poems: 1986–1993 (1994) Howl Annotated (1995) Illuminated Poems (1996) Selected Poems: 1947–1995 (1996) Death and Fame: Poems 1993–1997 (1999) Deliberate Prose 1952–1995 (2000) Howl & Other Poems 50th Anniversary Edition (2006), The Book of Martyrdom and Artifice: First Journals and Poems 1937-1952 (Da Capo Press, 2006) The Selected Letters of Allen Ginsberg and Gary Snyder (Counterpoint, 2009) I Greet You at the Beginning of a Great Career: The Selected Correspondence of Lawrence Ferlinghetti and Allen Ginsberg, 1955–1997 (City Lights, 2015) The Best Minds of My Generation: A Literary History of the Beats (Grove Press, 2017) Honors His collection The Fall of America shared the annual U.S. National Book Award for Poetry in 1974. In 1979, he received the National Arts Club gold medal and was inducted into the American Academy and Institute of Arts and Letters. Ginsberg was a Pulitzer Prize finalist in 1995 for his book Cosmopolitan Greetings: Poems 1986–1992. In 1993, he received a John Jay Award posthumously from Columbia. In 2014, Ginsberg was one of the inaugural honorees in the Rainbow Honor Walk, a walk of fame in San Francisco's Castro neighborhood noting LGBTQ people who have "made significant contributions in their fields." See also The Life and Times of Allen Ginsberg (film) :Category:Works by Allen Ginsberg Allen Ginsberg Live in London Hungry generation Howl (2010 film) LGBT culture in New York City List of LGBT people from New York City Central Park Be-In Trevor Carolan Counterculture of the 1960s Burroughs: the Movie by Howard Brookner List of peace activists Kill Your Darlings Jewish Buddhist American poetry Notes References Resources The Allen Ginsberg Papers, 1937–1994 (1,330 linear ft.) are housed in the Department of Special Collections and University Archives at Stanford University Libraries Further reading Boer, Charles. Charles Olson in Connecticut. North Carolina Wesleyan College Press, 1991, (1975). . Bullough, Vern L. "Before Stonewall: Activists for Gay and Lesbian Rights in Historical Context." Harrington Park Press, 2002. pp 304–311. Charters, Ann (ed.). The Portable Beat Reader. Penguin Books. New York. 1992. (hc); (pbk) Clark, Thomas. "Allen Ginsberg." Writers at WorkThe Paris Review Interviews. 3.1 (1968) pp. 279–320. Collins, Ronald & Skover, David. Mania: The Story of the Outraged & Outrageous Lives that Launched a Cultural Revolution (Top-Five books, March 2013) Gifford, Barry (ed.). As Ever: The Collected Letters of Allen Ginsberg & Neal Cassady. Berkeley: Creative Arts Books (1977). Ginsberg, Allen. Travels with Ginsberg: A Postcard Book. San Francisco: City Lights (2002). Hrebeniak, Michael. Action Writing: Jack Kerouac's Wild Form, Carbondale, IL: Southern Illinois UP, 2006. Kashner, Sam, When I Was Cool, My Life at the Jack Kerouac School, New York: HarperCollins Perennial, 2005. Podhoretz, Norman. "At War with Allen Ginsberg", in Ex-Friends (Free Press, 1999), 22–56. . McBride, Dick: Cometh With Clouds (Memory: Allen Ginsberg) Cherry Valley Editions, 1982 Morgan, Bill (ed.), I Greet You at the Beginning of a Great Career: The Selected Correspondence of Lawrence Ferlinghetti and Allen Ginsberg, 1955–1997. San Francisco: City Lights Publishers, 2015. Schumacher, Michael (ed.). Family Business: Selected Letters Between a Father and Son. Bloomsbury (2002), paperback, 448 pages, Schumacher, Michael. Dharma Lion: A Biography of Allen Ginsberg. New York: St. Martin's Press, 1994. Trigilio, Tony. Allen Ginsberg's Buddhist Poetics. Carbondale, IL: Southern Illinois University Press, 2007. Trigilio, Tony. "Strange Prophecies Anew": Rereading Apocalypse in Blake, H.D., and Ginsberg. Madison, NJ: Fairleigh Dickinson University Press, 2000. . Tytell, John. Naked Angels: Kerouac, Ginsberg, Burroughs. Chicago: Ivan R. Dee, 1976. Warner, Simon (ed.). Howl for Now: A 50th anniversary celebration of Allen Ginsberg's epic protest poem. West Yorkshire, UK: Route (2005), paperback, 144 pages, Warner, Simon. "Raising the Consciousness? Re-visiting Allen Ginsberg's 1965 trip to Liverpool", chapter in Centre of the Creative Universe: Liverpool and the Avant Garde, edited by Christoph Grunenberg and Robert Knifton. Liverpool & Chicago: Liverpool University Press & Chicago University Press, 2007, (pbk); (hc) Young, Allen Gay Sunshine interview with Allen Ginsberg. Grey Fox Press, 1974. First Thought is Best Thought, an interview with Allen Ginsberg, in Scottish International Volume 6, September 1973, pp. 18–23 External links Archives George Dowden papers on the Allen Ginsberg bibliography, 1966–1971 at Rare Book and Manuscripts Library, Columbia University Libraries Materials related to Allen Ginsberg in the Robert A. Wilson collection at Special Collections, University of Delaware Library Allen Ginsberg papers at Special Collections and University Archives, Stanford Libraries Audio recordings and interviews Audio recordings of Allen Ginsberg, from the Woodberry Poetry Room, Harvard University Audio recordings of Allen Ginsberg, from Maryland Institute College of Art's Decker Library, Internet Archive Modern American Poetry , interview Other links The Allen Ginsberg Trust Case Histories: Allen Ginsberg at PEN.org honoring Ginsberg's work, from PEN American Center Allen Ginsberg on Poets.org With audio clips, poems, and related essays, from the Academy of American Poets "After 50 Years, Ginsberg's Howl Still Resonates" NPR October 27, 2006 Allen Ginsberg photographs with hand-written captions at LensCulture Autobiographical Article in Shambhala Sun Magazine FBI agents were warned against interviewing Allen Ginsberg, fearing it would result in "embarrassment" from MuckRock.com Allen Ginsberg materials in "Beat Visions and the Counterculture" (online exhibition) at Special Collections, University of Delaware Library 1926 births 1997 deaths 20th-century American male writers 20th-century American poets 20th-century Buddhists Activists from New York (state) American anti–nuclear weapons activists American anti–Vietnam War activists American cannabis activists American expatriates in France American gay writers American LGBT poets American LGBT rights activists American male poets American pacifists American people of Russian-Jewish descent American psychedelic drug advocates American sailors American spoken word artists American tax resisters Beat Generation poets Brooklyn College faculty Columbia College (New York) alumni Converts to Buddhism Deaths from cancer in New York (state) Deaths from liver cancer Eastside High School (Paterson, New Jersey) alumni English-language haiku poets Free speech activists Gay academics Gay poets Harmonium players Industrial Workers of the World members Jewish American military personnel Jewish American poets LGBT Buddhists LGBT Jews LGBT people from Colorado LGBT people from New Jersey LGBT people from New York (state) Locust Music artists Military personnel from New Jersey Montclair State University alumni National Book Award winners Obscenity controversies in literature Outlaw poets Pedophile advocacy Pedophilia in the United States Writers from Greenwich Village Writers from the East Village, Manhattan Poets from New Jersey Postmodern writers Struga Poetry Evenings Golden Wreath laureates Tibetan Buddhists from the United States Transatlantic Records artists United States Merchant Mariners of World War II Writers from Boulder, Colorado Writers from Newark, New Jersey Writers from Paterson, New Jersey Yippies National Arts Club Medal of Honor Recipients	8
Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. Auto racing has existed since the invention of the automobile. Races of various sorts were organised, with the first recorded as early as 1867. Many of the earliest events were effectively reliability trials, aimed at proving these new machines were a practical mode of transport, but soon became an important way for automobile makers to demonstrate their machines. By the 1930s, specialist racing cars had developed. There are now numerous different categories, each with different rules and regulations. History The first prearranged match race of two self-powered road vehicles over a prescribed route occurred at 4:30 A.M. on August 30, 1867, between Ashton-under-Lyne and Old Trafford, England, a distance of . It was won by the carriage of Isaac Watt Boulton. Internal combustion auto racing events began soon after the construction of the first successful gasoline-fueled automobiles. The first organized contest was on April 28, 1887, by the chief editor of Paris publication , Monsieur Fossier. It ran from Neuilly Bridge to the Bois de Boulogne. On July 22, 1894, the Parisian magazine organized what is considered to be the world's first motoring competition, from Paris to Rouen. One hundred and two competitors paid a 10-franc entrance fee. The first American automobile race is generally held to be the Thanksgiving Day Chicago Times-Herald race of November 28, 1895. Press coverage of the event first aroused significant American interest in the automobile. The Targa Florio was an open road endurance automobile race held in the mountains of Sicily, Italy near the island's capital of Palermo. Founded in 1906, it was the oldest sports car racing event, part of the World Sportscar Championship between 1955 and 1973. The oldest surviving sports car racing event is the 24 Hours of Le Mans, begun in 1923. It is run by the Automobile Club of the West (ACO). Team Ferrari won the race in 2023. With auto construction and racing dominated by France, the French automobile club ACF staged a number of major international races, usually from or to Paris, connecting with another major city, in France or elsewhere in Europe. Aspendale Racecourse, in Australia, was the world's first purpose-built motor racing circuit, opening in January 1906. The pear-shaped track was close to a mile in length, with slightly banked curves and a gravel surface of crushed cement. Brooklands, in Surrey, England, was the first purpose-built 'banked' motor racing venue, opening in June 1907. It featured a concrete track with high-speed banked corners. One of the oldest existing purpose-built automobile racing circuits in the United States, still in use, is the Indianapolis Motor Speedway in Speedway, Indiana. It is the largest capacity sports venue of any variety worldwide, with a top capacity of some 257,000+ seated spectators. NASCAR was founded by Bill France Sr. on February 21, 1948, with the help of several other drivers of the time. The first NASCAR "Strictly Stock" race ever was held on June 19, 1949, at Daytona Beach, Florida, U.S.. From 1962, sports cars temporarily took a back seat to GT cars, with the (FIA) replacing the World Championship for Sports Cars with the International Championship for GT Manufacturers. From 1962 through 2003, NASCAR's premier series was called the Winston Cup Series, sponsored by R. J. Reynolds Tobacco Company cigarette brand Winston. The changes that resulted from RJR's involvement, as well as the reduction of the schedule from 56 to 34 races a year, established 1972 as the beginning of NASCAR's "modern era". The IMSA GT Series evolved into the American Le Mans Series, which ran its first season in 1998. The European races eventually became the closely related European Le Mans Series, both of which mix prototypes and GTs. (TC) is a popular touring car racing series in Argentina, and one of the oldest car racing series still active in the world. The first TC competition took place in 1931 with 12 races, each in a different province. Future Formula One star Juan Manuel Fangio (Chevrolet) won the 1940 and 1941 editions of the TC. It was during this time that the series' Chevrolet-Ford rivalry began, with Ford acquiring most of its historical victories. Over the last few years, auto racing has seen a transformative shift, echoing past pivots. The industry, much like the cars it champions, has had to navigate through the hairpin turns of a global pandemic and a persistent chip shortage, each threatening to derail production schedules. At the same time, a new course is being charted towards an electric future, a dramatic change in direction that's challenging the old guard of gasoline engines. There is also a growing number of events for electric racing cars, such as the Formula E,the Eco Grand Prix or the Electric GT Championship. Categories Open-wheel racing In single-seater (open-wheel) racing, the wheels are not covered, and the cars often have aerofoil wings front and rear to produce downforce and enhance adhesion to the track. The two most popular varieties of open-wheel road racing are Formula One and the IndyCar Series. In Europe and Asia, open-wheeled racing is commonly referred to as 'Formula', with appropriate hierarchical suffixes. In North America, the 'Formula' terminology is not followed (with the exception of F1). The sport is usually arranged to follow an international format (such as F1), a regional format (such as the Formula 3 Euro Series), and/or a domestic, or country-specific, format (such as the German Formula 3 championship, or the British Formula Ford). F1 is a worldwide series that runs only street circuit and race tracks. These cars are heavily based on technology and their aerodynamics. The speed record was set in 2005 by Juan Pablo Montoya hitting 373 km/h (232 mph). Some of the most prominent races are the Monaco Grand Prix, the Italian Grand Prix, and the British Grand Prix. The season ends with the crowning of the World Championship for drivers and constructors. In the United States, the most popular series is the IndyCar Series. The cars have traditionally been similar to, though less technologically sophisticated than, F1 cars, with more restrictions on technology aimed at controlling costs. While these cars are not as technologically advanced, they are faster, mainly because they compete on oval race tracks, being able to average a lap at 388 km/h (241 mph). The series' biggest race is the Indianapolis 500, which is commonly referred to as "The Greatest Spectacle in Racing" due to being the longest continuously run race and having the largest crowd for a single-day sporting event (350,000+). The other major international single-seater racing series is Formula 2 (formerly known as Formula 3000 and GP2 Series). Regional series include Super Formula and Formula V6 Asia (specifically in Asia), Formula Renault 3.5 (also known as the World Series by Renault, succession series of World Series by Nissan), Formula Three, Formula Palmer Audi and Formula Atlantic. In 2009, the FIA Formula Two Championship brought about the revival of the F2 series. Domestic, or country-specific, series include Formula Three and Formula Renault, with the leading introductory series being Formula Ford. Single-seater racing is not limited merely to professional teams and drivers. There exist many amateur racing clubs. In the UK, the major club series are the Monoposto Racing Club, BRSCC F3 (Formerly ClubF3, formerly ARP F3), Formula Vee and Club Formula Ford. Each series caters to a section of the market, with some primarily providing low-cost racing, while others aim for an authentic experience using the same regulations as the professional series (BRSCC F3). There are other categories of single-seater racing, including kart racing, which employs a small, low-cost machine on small tracks. Many of the current top drivers began their careers in karts. Formula Ford represents the most popular first open-wheel category for up-and-coming drivers stepping up from karts. The series is still the preferred option, as it has introduced an aero package and slicks, allowing the junior drivers to gain experience in a race car with dynamics closer to F1. The Star Mazda Series is another entry-level series. Students at colleges and universities can also take part in single-seater racing through the Formula SAE competition, which involves designing and building a single-seater car in a multidisciplinary team and racing it at the competition. This also develops other soft skills, such as teamwork, while promoting motorsport and engineering. The world's first all-female Formula racing team was created in 2006. The group was an assemblage of drivers from different racing disciplines and formed for an MTV reality pilot, which was shot at Mazda Raceway Laguna Seca. In December 2005, the FIA gave approval to Superleague Formula racing, which debuted in 2008, whereby the racing teams are owned and run by prominent sports clubs such as A.C. Milan and Liverpool F.C. After 25 years away from the sport, former Formula 2 champion Jonathan Palmer reopened the F2 category again; most drivers have graduated from the Formula Palmer Audi series. The category is officially registered as the FIA Formula Two championship. Most rounds have two races and are support races to the FIA World Touring Car Championship. Touring car racing Touring car racing is a style of road racing that is run with production-derived four-seat race cars. The lesser use of aerodynamics means following cars have a much easier time passing than in open-wheel racing. It often features full-contact racing with subtle bumping and nudging due to the small speed differentials and large grids. The major touring car championships conducted worldwide are the Supercars Championship (Australia), British Touring Car Championship, Deutsche Tourenwagen Masters (DTM), World Touring Car Championship and the World Touring Car Cup. The European Touring Car Cup is a one-day event open to Super 2000 specification touring cars from Europe's many national championships. The Sports Car Club of America's SPEED World Challenge Touring Car and GT championships are dominant in North America. America's historic Trans-Am Series is undergoing a period of transition, but is still the longest-running road racing series in the U.S. The National Auto Sport Association also provides a venue for amateurs to compete in home-built factory-derived vehicles on various local circuits. Sports car racing In sports car racing, production-derived versions of two-seat sports cars, also known as grand tourers (GTs), and purpose-built sports prototype cars compete within their respective classes on closed circuits. The premier championship series of sports car racing is the FIA World Endurance Championship. The main series for GT car racing is the GT World Challenge Europe, divided into two separate championships: the GT World Challenge Europe Sprint Cup and the GT World Challenge Europe Endurance Cup. This series has formed after the folding of the various FIA GT championships. Other major GT championships include the GT World Challenge America, GT World Challenge Asia, Super GT, and the International GT Open. There are minor regional and national GT series using mainly GT4 and GT3 cars featuring both amateur and professional drivers. Sports prototypes, unlike GT cars, do not rely on road-legal cars as a base. They are closed-wheel and often closed-cockpit purpose-built race cars intended mainly for endurance racing. They have much lower weight and more downforce compared to GT cars, making them much faster. They are raced in the 24 hours of Le Mans (held annually since 1923) and in the (European) Le Mans series, Asian Le Mans Series and the WeatherTech SportsCar Championship. These cars are referred to as LMP (Le Mans prototype) cars with LMP1 being run mainly by manufacturers and the slightly less powerful LMP2 cars run by privateer teams. All three Le Mans Series run GT cars in addition to Le Mans Prototypes; these cars have different restrictions than the FIA GT cars. Another prototype and GT racing championship exists in the United States; the Grand-Am, which began in 2000, sanctions its own endurance series, the Rolex Sports Car Series, which consists of slower and lower-cost race cars compared to LMP and FIA GT cars. The Rolex Sports Car Series and American Le Mans Series announced a merger between the two series forming the WeatherTech SportsCar Championship starting in 2014. These races are often conducted over long distances, at least , and cars are driven by teams of two or more drivers, switching every few hours. Due to the performance difference between production-based sports cars and purpose-built sports prototypes, one race usually involves several racing classes, each fighting for its own championship. Famous sports car races include the 24 Hours of Le Mans, the Rolex 24 at Daytona, 24 Hours of Spa-Franchorchamps, the 12 Hours of Sebring, the 6 Hours of Watkins Glen, and the Petit Le Mans at Road Atlanta. There is also the 24 Hours of the Nürburgring on the infamous Nordschleife track and the Dubai 24 Hour, which is aimed at GT3 and below cars with a mixture of professional and pro-am drivers. Production-car racing Production-car racing, otherwise known as "showroom stock" in the US, is an economical and rules-restricted version of touring-car racing, mainly used to restrict costs. Numerous production racing categories are based on particular makes of cars. Most series, with a few exceptions, follow the Group N regulation. There are several different series that are run all over the world, most notably, Japan's Super Taikyu and IMSA's Firehawk Series, which ran in the 1980s and 1990s all over the United States. Stock car racing In North America, stock car racing is the most popular form of auto racing. Primarily raced on oval tracks, stock cars vaguely resemble production cars, but are in fact purpose-built racing machines that are built to tight specifications and, together with touring cars, also called Silhouette racing cars. The largest stock car racing governing body is NASCAR (National Association for Stock Car Auto Racing). NASCAR's premier series is the NASCAR Cup Series, its most famous races being the Daytona 500, the Southern 500, the Coca-Cola 600, and the Brickyard 400. NASCAR also runs several feeder series, including the Xfinity Series and Gander RV & Outdoors Truck Series (a pickup truck racing series). The series conduct races across the entire continental United States. The NASCAR Pinty's Series conducts races across Canada and the NASCAR PEAK Mexico Series conducts races across Mexico. NASCAR also governs several smaller regional series, such as the Whelen Modified Tour. Modified cars are best described as open-wheel cars. Modified cars have no parts related to the stock vehicle for which they are named after. A number of modified cars display a "manufacturer's" logo and "vehicle name", yet use components produced by another automobile manufacturer. There are also other stock car governing bodies, most notably the Automobile Racing Club of America (ARCA). In the UK, British Stock car racing is also referred to as "Short Circuit Racing". UK Stock car racing started in the 1950s and grew rapidly through the 1960s and 1970s. Events take place on shale or tarmac tracks – usually around 1/4 mile long. There are around 35 tracks in the UK and upwards of 7000 active drivers. The sport is split into three basic divisions – distinguished by the rules regarding car contact during racing. The most famous championship are the BriSCA F1 Stock Cars. Full-contact formulas include Bangers, Bombers, and Rookie Bangers – and racing features Demolition Derbies, Figure of Eight, and Oval Racing. Semi Contact Formulas include BriSCA F1, F2, and Superstox – where bumpers are used tactically. Non-contact formulas include National Hot Rods, Stock Rods, and Lightning Rods. One-make racing One-make, or single marque, championships often employ production-based cars from a single manufacturer or even a single model from a manufacturer's range. There are numerous notable one-make formulae from various countries and regions, some of which – such as the Porsche Supercup and, previously, IROC – have fostered many distinct national championships. Single marque series are often found at the club level, to which the production-based cars, limited modifications, and close parity in performance are very well suited. Some of the better-known single-make series are the Mini 7 Championship (Europe's longest-running one-make championship), the Radical European Masters, John Cooper Mini Challenge, Clio Cup, Ginettas, Caterhams, BMWs, and MX5s. There are also single-chassis single seater formulae, such as Formula Renault and Formula BMW, usually as "feeder" series for "senior" race formula (in the fashion of farm teams). Drag racing In drag racing, the objective is to complete a given straight-line distance, from a standing start, ahead of a vehicle in a parallel lane. This distance is traditionally , though has become popular since the 1990s. The vehicles may or may not be given the signal to start at the same time, depending on the class of racing. Vehicles range from the everyday car to the purpose-built dragster. Speeds and elapsed time differ from class to class. Average street cars cover the mile in 12 to 16 seconds, whereas a top fuel dragster takes 4.5 seconds or less, reaching speeds of up to . Drag racing was organized as a sport by Wally Parks in the early 1950s through the National Hot Rod Association (NHRA). The NHRA was formed to discourage street racing. When launching, a top fuel dragster will accelerate at 3.4 g (33 m/s2), and when braking parachutes are deployed the deceleration is 4 g (39 m/s2), more than the Space Shuttle experiences. A top fuel car can be heard over away and can generate a reading from 1.5 to 3.9 on the Richter scale. Drag racing is two cars head-to-head, the winner proceeding to the next round. Professional classes are all first to the finish line wins. Sportsman racing is handicapped (slower car getting a head start) using an index (a lowest e.t. allowed), and cars running under (quicker than) their index "break out" and lose. The slowest cars, bracket racers, are also handicapped, but rather than an index, they use a dial-in. Off-road racing In off-road racing, various classes of specially modified vehicles, including cars, compete in races through off-road environments. In North America these races often take place in the desert, such as the famous Baja 1000. Another format for off-road racing happens on closed-course short course tracks such as Crandon International Off-Road Raceway. In the 1980s and 1990s, the short course was extended to racing inside stadiums in the Mickey Thompson Entertainment Group; this format was revived by Robby Gordon in 2013 with his Stadium Super Trucks series. In Europe, "offroad" refers to events such as autocross or rallycross, while desert races and rally-raids such as the Paris-Dakar, Master Rallye or European "bajas" are called "cross-country rallies". Kart racing The modern kart was invented by Art Ingels, a fabricator at the Indianapolis-car manufacturer Kurtis-Kraft, in Southern California in 1956. Ingels took a small chainsaw engine and mounted it to a simple tube-frame chassis weighing less than 100 lb. Ingels, and everyone else who drove the kart, were startled at its performance capabilities. The sport soon blossomed in Southern California, and quickly spread around the world. Although often seen as the entry point for serious racers into the sport, kart racing, or karting, can be an economical way for amateurs to try racing and is also a fully-fledged international sport in its own right. A large proportion of professional racing drivers began in karts, often from a very young age, such as Michael Schumacher and Fernando Alonso. Several former motorcycle champions have also taken up the sport, notably Wayne Rainey, who was paralysed in a racing accident and now races a hand-controlled kart. As one of the cheapest ways to race, karting is seeing its popularity grow worldwide. Despite their diminutive size, karts of the most powerful class, superkart (assuming a weight of 205 kg (452 lb), and a power output of 100 hp (75 kW)), can have a power-to-weight ratio (including the driver) of 490 hp/tonne (0.22 hp/lb). Without the driver, this figure doubles, to almost 980 hp/tonne (0.44 hp/lb). Historical racing Historic motorsport or vintage motorsport uses vehicles limited to a particular era. Only safety precautions are modernized in these hobbyist races. A historical event can be of various types of motorsport disciplines, from road racing to rallying. Because it is based on a particular era it is more hobbyist-oriented, reducing corporate sponsorship. The only modern equipment used is related to safety and timing. A historical event can be of a number of different motorsport disciplines. Some of the most famous events include the Goodwood Festival of Speed and Goodwood Revival in Britain and Monterey Historic in the United States. Championships range from "grass root" Austin Seven racing to the FIA Thoroughbred Grand Prix Championship for classic Formula One chassis. While there are several professional teams and drivers in historical racing, this branch of auto sport tends to be contested by wealthy car owners and is thus more amateur and less competitive in its approach. Other categories Use of flags In many types of auto races, particularly those held on closed courses, flags are displayed to indicate the general status of the track and to communicate instructions to competitors. While individual series have different rules, and the flags have changed from the first years (e.g., red used to start a race), these are generally accepted. Accidents The worst accident in racing history is the 1955 Le Mans disaster, where more than 80 people died, including the French driver Pierre Levegh. Racing-car setup In auto racing, the racing setup or car setup is the set of adjustments made to the vehicle to optimize its behaviour (performance, handling, reliability, etc.). Adjustments can occur in suspensions, brakes, transmissions, engines, tires, and many others. Aerodynamics Aerodynamics and airflow play big roles in the setup of a race car. Aerodynamic downforce improves the race car's handling by lowering the center of gravity and distributing the weight of the car equally on each tire. Once this is achieved, fuel consumption decreases and the forces against the car are significantly lowered. Many aerodynamic experiments are conducted in wind tunnels, to simulate real-life situations while measuring the various drag forces on the car. These "Rolling roads" produce many wind situations and direct air flow at certain speeds and angles. When a diffuser is installed under the car, the amount of drag force is significantly lowered, and the overall aerodynamics of the vehicle is positively adjusted. Wings and canards channel the airflow in the most efficient way to get the least amount of drag from the car. It is experimentally proven that downforce is gained and the vehicle's handling is considerably changed when aerodynamic wings on the front and rear of the vehicle are installed. Suspension Suspension plays a huge part in giving the race car the ability to be driven optimally. Shocks are mounted vertically or horizontally to prevent the body from rolling in the corners. The suspension is important because it makes the car stable and easier to control and keeps the tires on the road when driving on uneven terrain. It works in three different ways including vertically, longitudinally, and laterally to control movement when racing on various tracks. Tyres Tyres called R-Compounds are commonly used in motorsports for high amounts of traction. The soft rubber allows them to expand when they are heated up, making more surface area on the pavement, therefore producing the most traction. These types of tyres do not have grooves on them. Tyre pressure is dependent on the temperature of the tyre and track when racing. Each time a driver pulls into the pits, the tyre pressure and temperature should be tested for optimal performance. When the tyres get too hot they will swell or inflate and need to be deflated to the correct pressure. When the tyres are not warmed up they will not perform as well. Brakes Brakes on a race car are imperative in slowing and stopping the car at precise times and wear quickly depending on the road or track on which the car is being raced, how many laps are being run, track conditions due to weather, and how many caution runs require more braking. There are three variables to consider in racing: brake pedal displacement, brake pedal force, and vehicle deceleration. Various combinations of these variables work together to determine the stiffness, sensitivity, and pedal force of the brakes. When using the brakes effectively, the driver must go through a buildup phase and end with a modulating phase. These phases include attaining maximum deceleration and modulating the brake pressure. Brake performance is measured in bite and consistency. Bite happens when the driver first applies the brakes and they have not warmed up to the correct temperature to operate efficiently. Consistency is measured in how consistent the friction is during the entire time of braking. These two measurements determine the wear of the brakes. Engine The race car's engine needs a considerable amount of air to produce maximum power. The air intake manifold sucks the air from scoops on the hood and front bumper and feeds it into the engine. Many engine modifications to increase horsepower and efficiency are commonly used in many racing-sanctioning bodies. Engines are tuned on a machine called a dynamometer, which is commonly known in the racing world as a DYNO. The car is driven onto the DYNO and many gauges and sensors are hooked up to the car that are controlled by an online program to test force, torque, or power. Through the testing, the car's engine maps can be changed to get the most horsepower and ultimately speed out of the vehicle. Racing drivers Racing drivers, at the highest levels, are usually paid by the team, or by sponsors, and can command very substantial salaries. Contrary to what may be popularly assumed, racing drivers as a group do not have unusually better reflexes or peripheral response time. During repeated physiological (and psychological) evaluations of professional racing drivers, the two characteristics that stand out are racers' near-obsessive need to control their surroundings (the psychological aspect), and an unusual ability to process fast-moving information (physiological). In this, researchers have noted a strong correlation between racers' psychological profiles and those of fighter pilots. In tests comparing racers to members of the general public, the greater the complexity of the information processing matrix, the greater the speed gap between racers and the public. Due partly to the performance capabilities of modern racing cars, racing drivers require a high level of fitness, focus, and the ability to concentrate at high levels for long periods in an inherently difficult environment. Racing drivers mainly complain about pains in the lumbar, shoulder, and neck regions. Racing drivers experience extremely large g-forces because formula cars and sports prototypes generate more downforce and are able to corner at significantly higher speeds. Formula 1 drivers routinely experience g-loadings in excess of 4.5 g. See also Outline of auto racing List of auto racing tracks Motorcycle racing Race track List of auto racing films Racing video game References External links Sanctioning bodies Motorsports UK Association American Le Mans Series (ALMS) Indy Racing League (IRL) Fédération Internationale de l'Automobile (FIA) Grand American Road Racing Association International Conference of Sports Car Clubs (ICSCC) International Hot Rod Association (IHRA) International Motor Sports Association (IMSA) National Auto Sport Association National Association for Stock Car Auto Racing (NASCAR) National Hot Rod Association (NHRA) No Prep Racing SCORE International Off-Road Racing Sports Car Club of America (SCCA) United States Auto Club (USAC) Formula One (F1) Confederation of Australian Motorsport (CAMS) Best In The Desert Off-Road Racing	13
Anarcho-capitalism (colloquially: ancap or '"an-cap"') is an anti-statist, libertarian political philosophy and economic theory that seeks to abolish centralized states in favor of stateless societies with systems of private property enforced by private agencies, the non-aggression principle, free markets and self-ownership, which extends the concept to include control of private property as part of the self. In the absence of statute, anarcho-capitalists hold that society tends to contractually self-regulate and civilize through participation in the free market, which they describe as a voluntary society involving the voluntary exchange of goods and services. In a theoretical anarcho-capitalist society, the system of private property would still exist and be enforced by private defense agencies and/or insurance companies selected by customers, which would operate competitively in a market and fulfill the roles of courts and the police. According to its proponents, various historical theorists have espoused philosophies similar to anarcho-capitalism. While the earliest extant attestation of "anarchocapitalism [sic]" is in Karl Hess's essay "The Death of Politics" published by Playboy in March 1969, the person credited with coining the terms anarcho-capitalism and anarcho-capitalist is Murray Rothbard. Rothbard, a leading figure in the 20th-century American libertarian movement, synthesized elements from the Austrian School, classical liberalism and 19th-century American individualist anarchists and mutualists Lysander Spooner and Benjamin Tucker, while rejecting the labor theory of value. Rothbard's anarcho-capitalist society would operate under a mutually agreed-upon "legal code which would be generally accepted, and which the courts would pledge themselves to follow". This legal code would recognize contracts between individuals, private property, self-ownership and tort law in keeping with the non-aggression principle. Rothbard views the power of the state as unjustified, arguing that it restricts individual rights and prosperity, and creates social and economic problems. Anarcho-capitalists and right-libertarians cite several historical precedents of what they believe to be examples of quasi-anarcho-capitalism, including the Republic of Cospaia, Acadia, Anglo-Saxon England, Medieval Iceland, the American Old West, Gaelic Ireland, and merchant law, admiralty law, and early common law. Anarcho-capitalism is distinguished from minarchism, which advocates a night-watchman state limited to protecting individuals from aggression and enforcing private property. Unlike most anarchists, anarcho-capitalists support private property and private institutions. Classification Anarcho-capitalism developed from radical American anti-state libertarianism and individualist anarchism. A strong current within anarchism does not consider anarcho-capitalism to be part of the anarchist movement because they argue that anarchism has historically been an anti-capitalist movement and for definitional reasons which see anarchism as incompatible with capitalist forms. According to several scholars, Anarcho-capitalism lies outside the tradition of the vast majority of anarchist schools of thought and is more closely affiliated with capitalism, right-libertarianism and neoliberalism. Social anarchists oppose and reject capitalism, and consider "anarcho-capitalism" to be a contradiction in terms, although some, including anarcho-capitalists and right-libertarians, consider anarcho-capitalism to be a form of anarchism. According to the Encyclopædia Britannica:Anarcho-capitalism is occasionally seen as part of the New Right. Philosophy Author J Michael Oliver says that during the 1960s, a philosophical movement arose in the United States that championed "reason, ethical egoism, and free-market capitalism". According to Oliver, anarcho-capitalism is a political theory which logically follows the philosophical conclusions of Objectivism, a philosophical system developed by Russian-American writer Ayn Rand, but Oliver acknowledges that his advocacy of anarcho-capitalism is "quite at odds with Rand's ardent defense of 'limited government. Professor Lisa Duggan also says that Rand's anti-statist, pro–"free market" stances went on to shape the politics of anarcho-capitalism. According to Patrik Schumacher, the political ideology and programme of Anarcho-capitalism envisages the radicalization of the neoliberal "rollback of the state", and calls for the extension of "entrepreneurial freedom" and "competitive market rationality" to the point where the scope for private enterprise is all-encompassing and "leaves no space for state action whatsoever". On the state Anarcho-capitalists oppose the state and seek to privatize any useful service the government presently provides, such as education, infrastructure, or the enforcement of law. They see capitalism and the "free market" as the basis for a free and prosperous society. Murray Rothbard stated that the difference between free-market capitalism and state capitalism is the difference between "peaceful, voluntary exchange" and a "collusive partnership" between business and government that "uses coercion to subvert the free market". Rothbard argued that all government services, including defense, are inefficient because they lack a market-based pricing mechanism regulated by "the voluntary decisions of consumers purchasing services that fulfill their highest-priority needs" and by investors seeking the most profitable enterprises to invest in. Maverick Edwards of the Liberty University describes anarcho-capitalism as a political, social, and economic theory that places markets as the central "governing body" and where government no longer "grants" rights to its citizenry. Non-aggression principle Writer Stanisław Wójtowicz says that although anarcho-capitalists are against centralized states, they hold that all people would naturally share and agree to a specific moral theory based on the non-aggression principle. While the Friedmanian formulation of anarcho-capitalism is robust to the presence of violence and in fact, assumes some degree of violence will occur, anarcho-capitalism as formulated by Rothbard and others holds strongly to the central libertarian nonaggression axiom, sometimes non-aggression principle. Rothbard wrote: Rothbard's defense of the self-ownership principle stems from what he believed to be his falsification of all other alternatives, namely that either a group of people can own another group of people, or that no single person has full ownership over one's self. Rothbard dismisses these two cases on the basis that they cannot result in a universal ethic, i.e. a just natural law that can govern all people, independent of place and time. The only alternative that remains to Rothbard is self-ownership which he believes is both axiomatic and universal. In general, the non-aggression axiom is described by Rothbard as a prohibition against the initiation of force, or the threat of force, against persons (in which he includes direct violence, assault and murder) or property (in which he includes fraud, burglary, theft and taxation). The initiation of force is usually referred to as aggression or coercion. The difference between anarcho-capitalists and other libertarians is largely one of the degree to which they take this axiom. Minarchist libertarians such as libertarian political parties would retain the state in some smaller and less invasive form, retaining at the very least public police, courts, and military. However, others might give further allowance for other government programs. In contrast, Rothbard rejects any level of "state intervention", defining the state as a coercive monopoly and as the only entity in human society, excluding acknowledged criminals, that derives its income entirely from coercion, in the form of taxation, which Rothbard describes as "compulsory seizure of the property of the State's inhabitants, or subjects." Some anarcho-capitalists such as Rothbard accept the non-aggression axiom on an intrinsic moral or natural law basis. It is in terms of the non-aggression principle that Rothbard defined his interpretation of anarchism, "a system which provides no legal sanction for such aggression ['against person and property']"; and wrote that "what anarchism proposes to do, then, is to abolish the State, i.e. to abolish the regularized institution of aggressive coercion". In an interview published in the American libertarian journal The New Banner, Rothbard stated that "capitalism is the fullest expression of anarchism, and anarchism is the fullest expression of capitalism". Property Private property Anarcho-capitalists postulate the privatization of everything, including cities with all their infrastructures, public spaces, streets and urban management systems. Central to Rothbardian anarcho-capitalism are the concepts of self-ownership and original appropriation that combines personal and private property. Hans-Hermann Hoppe wrote: Rothbard however rejected the Lockean proviso, and followed the rule of "first come, first served", without any consideration of how much resources are left for other individuals. Anarcho-capitalists advocate private ownership of the means of production and the allocation of the product of labor created by workers within the context of wage labour and the free market – that is through decisions made by property and capital owners, regardless of what an individual needs or does not need. Original appropriation allows an individual to claim any never-before-used resources, including land and by improving or otherwise using it, own it with the same "absolute right" as their own body, and retaining those rights forever, regardless of whether the resource is still being used by them. According to Rothbard, property can only come about through labor, therefore original appropriation of land is not legitimate by merely claiming it or building a fence around it—it is only by using land and by mixing one's labor with it that original appropriation is legitimized: "Any attempt to claim a new resource that someone does not use would have to be considered invasive of the property right of whoever the first user will turn out to be". Rothbard argued that the resource need not continue to be used in order for it to be the person's property as "for once his labor is mixed with the natural resource, it remains his owned land. His labor has been irretrievably mixed with the land, and the land is therefore his or his assigns' in perpetuity". Rothbard also spoke about a theory of justice in property rights: In Justice and Property Rights, Rothbard wrote that "any identifiable owner (the original victim of theft or his heir) must be accorded his property". In the case of slavery, Rothbard claimed that in many cases "the old plantations and the heirs and descendants of the former slaves can be identified, and the reparations can become highly specific indeed". Rothbard believed slaves rightfully own any land they were forced to work on under the homestead principle. If property is held by the state, Rothbard advocated its confiscation and "return to the private sector", writing that "any property in the hands of the State is in the hands of thieves, and should be liberated as quickly as possible". Rothbard proposed that state universities be seized by the students and faculty under the homestead principle. Rothbard also supported the expropriation of nominally "private property" if it is the result of state-initiated force such as businesses that receive grants and subsidies. Rothbard further proposed that businesses who receive at least 50% of their funding from the state be confiscated by the workers, writing: "What we libertarians object to, then, is not government per se but crime, what we object to is unjust or criminal property titles; what we are for is not 'private' property per se but just, innocent, non-criminal private property". Similarly, Karl Hess wrote that "libertarianism wants to advance principles of property but that it in no way wishes to defend, willy nilly, all property which now is called private ... Much of that property is stolen. Much is of dubious title. All of it is deeply intertwined with an immoral, coercive state system". By accepting an axiomatic definition of private property and property rights, anarcho-capitalists deny the legitimacy of a state on principle. Hans-Hermann Hoppe argues: Anarchists view capitalism as an inherently authoritarian and hierarchical system and seek the abolishment of private property. There is disagreement between anarchists and anarcho-capitalists as the former generally rejects anarcho-capitalism as a form of anarchism and considers anarcho-capitalism a contradiction in terms, while the latter holds that the abolishment of private property would require expropriation which is "counterproductive to order" and would require a state. Common property As opposed to anarchists, most anarcho-capitalists reject the commons. However, some of them propose that non-state public or community property can also exist in an anarcho-capitalist society. For anarcho-capitalists, what is important is that it is "acquired" and transferred without help or hindrance from what they call the "compulsory state". Deontological anarcho-capitalists believe that the only just and most economically beneficial way to acquire property is through voluntary trade, gift, or labor-based original appropriation, rather than through aggression or fraud. Anarcho-capitalists state that there could be cases where common property may develop in a Lockean natural rights framework. Anarcho-capitalists make the example of a number of private businesses which may arise in an area, each owning the land and buildings that they use, but they argue that the paths between them become cleared and trodden incrementally through customer and commercial movement. These thoroughfares may become valuable to the community, but according to them ownership cannot be attributed to any single person and original appropriation does not apply because many contributed the labor necessary to create them. In order to prevent it from falling to the "tragedy of the commons", anarcho-capitalists suggest transitioning from common to private property, wherein an individual would make a homesteading claim based on disuse, acquire title by the assent of the community consensus, form a corporation with other involved parties, or other means. Randall G. Holcombe see challenges stemming from the idea of common property under anarcho-capitalism, such as whether an individual might claim fishing rights in the area of a major shipping lane and thereby forbid passage through it. In contrast, Hoppe's work on anarcho-capitalist theory is based on the assumption that all property is privately held, "including all streets, rivers, airports, and harbors" which forms the foundation of his views on immigration. Intellectual property Some anarcho-capitalists strongly oppose intellectual property (i.e., trademarks, patents, copyrights). Stephan N. Kinsella argues that ownership only relates to tangible assets. Contractual society The society envisioned by anarcho-capitalists has been labelled by them as a "contractual society" which Rothbard described as "a society based purely on voluntary action, entirely unhampered by violence or threats of violence" The system relies on contracts between individuals as the legal framework which would be enforced by private police and security forces as well as private arbitrations. Rothbard argues that limited liability for corporations could also exist through contract, arguing that "[c]orporations are not at all monopolistic privileges; they are free associations of individuals pooling their capital. On the purely free market, those men would simply announce to their creditors that their liability is limited to the capital specifically invested in the corporation". There are limits to the right to contract under some interpretations of anarcho-capitalism. Rothbard believes that the right to contract is based in inalienable rights and because of this any contract that implicitly violates those rights can be voided at will, preventing a person from permanently selling himself or herself into unindentured slavery. That restriction aside, the right to contract under anarcho-capitalist order would be pretty broad. For example, Rothbard went as far as to justify stork markets, arguing that a market in guardianship rights would facilitate the transfer of guardianship from abusive or neglectful parents to those more interested or suited to raising children. Other anarcho-capitalists have also suggested the legalization of organ markets, as in Iran's renal market. Other interpretations conclude that banning such contracts would in itself be an unacceptably invasive interference in the right to contract. Included in the right of contract is "the right to contract oneself out for employment by others". While anarchists criticize wage labour describing it as wage slavery, anarcho-capitalists view it as a consensual contract. Some anarcho-capitalists prefer to see self-employment prevail over wage labor. David D. Friedman has expressed a preference for a society where "almost everyone is self-employed" and "instead of corporations there are large groups of entrepreneurs related by trade, not authority. Each sells not his time, but what his time produces". Law and order and the use of violence Different anarcho-capitalists propose different forms of anarcho-capitalism and one area of disagreement is in the area of law. In The Market for Liberty, Morris and Linda Tannehill object to any statutory law whatsoever. They argue that all one has to do is ask if one is aggressing against another in order to decide if an act is right or wrong. However, while also supporting a on force and fraud, Rothbard supports the establishment of a mutually agreed-upon centralized libertarian legal code which private courts would pledge to follow, as he presumes a high degree of convergence amongst individuals about what constitutes natural justice. Unlike both the Tannehills and Rothbard who see an ideological commonality of ethics and morality as a requirement, David D. Friedman proposes that "the systems of law will be produced for profit on the open market, just as books and bras are produced today. There could be competition among different brands of law, just as there is competition among different brands of cars". Friedman says whether this would lead to a libertarian society "remains to be proven". He says it is a possibility that very un-libertarian laws may result, such as laws against drugs, but he thinks this would be rare. He reasons that "if the value of a law to its supporters is less than its cost to its victims, that law ... will not survive in an anarcho-capitalist society". Anarcho-capitalists only accept the collective defense of individual liberty (i.e. courts, military, or police forces) insofar as such groups are formed and paid for on an explicitly voluntary basis. However, their complaint is not just that the state's defensive services are funded by taxation, but that the state assumes it is the only legitimate practitioner of physical force—that is, they believe it forcibly prevents the private sector from providing comprehensive security, such as a police, judicial and prison systems to protect individuals from aggressors. Anarcho-capitalists believe that there is nothing morally superior about the state which would grant it, but not private individuals, a right to use physical force to restrain aggressors. If competition in security provision were allowed to exist, prices would also be lower and services would be better according to anarcho-capitalists. According to Molinari: "Under a regime of liberty, the natural organization of the security industry would not be different from that of other industries". Proponents believe that private systems of justice and defense already exist, naturally forming where the market is allowed to "compensate for the failure of the state", namely private arbitration, security guards, neighborhood watch groups and so on. These private courts and police are sometimes referred to generically as private defense agencies (PDAs). The defense of those unable to pay for such protection might be financed by charitable organizations relying on voluntary donation rather than by state institutions relying on taxation, or by cooperative self-help by groups of individuals. Edward Stringham argues that private adjudication of disputes could enable the market to internalize externalities and provide services that customers desire. Rothbard stated that the American Revolutionary War and the War of Southern Secession were the only two just wars in American military history. Some anarcho-capitalists such as Rothbard feel that violent revolution is counter-productive and prefer voluntary forms of economic secession to the extent possible. Retributive justice is often a component of the contracts imagined for an anarcho-capitalist society. According to Matthew O'Keefee, some anarcho-capitalists believe prisons or indentured servitude would be justifiable institutions to deal with those who violate anarcho-capitalist property relations while others believe exile or forced restitution are sufficient. Rothbard stressed the importance of restitution as the primary focus of a libertarian legal order and advocated for corporal punishment for petty vandals and the death penalty for murders. Bruce L. Benson argues that legal codes may impose punitive damages for intentional torts in the interest of deterring crime. Benson gives the example of a thief who breaks into a house by picking a lock. Even if caught before taking anything, Benson argues that the thief would still owe the victim for violating the sanctity of his property rights. Benson opines that despite the lack of objectively measurable losses in such cases, "standardized rules that are generally perceived to be fair by members of the community would, in all likelihood, be established through precedent, allowing judgments to specify payments that are reasonably appropriate for most criminal offenses". Morris and Linda Tannehill raise a similar example, saying that a bank robber who had an attack of conscience and returned the money would still owe reparations for endangering the employees' and customers' lives and safety, in addition to the costs of the defense agency answering the teller's call for help. However, they believe that the robber's loss of reputation would be even more damaging. They suggest that specialized companies would list aggressors so that anyone wishing to do business with a man could first check his record, provided they trust the veracity of the companies' records. They further theorise that the bank robber would find insurance companies listing him as a very poor risk and other firms would be reluctant to enter into contracts with him. Influences Murray Rothbard has listed different ideologies of which his interpretations, he said, have influenced anarcho-capitalism. This includes his interpretation of anarchism, and more precisely individualist anarchism; classical liberalism and the Austrian School of economic thought. Scholars additionally associate anarcho-capitalism with neo-classical liberalism, radical neoliberalism and right-libertarianism. Anarchism In both its social and individualist forms, anarchism is usually considered an anti-capitalist and radical left-wing or far-left movement that promotes libertarian socialist economic theories such as collectivism, communism, individualism, mutualism and syndicalism. Because anarchism is usually described alongside libertarian Marxism as the libertarian wing of the socialist movement and as having a historical association with anti-capitalism and socialism, anarchists believe that capitalism is incompatible with social and economic equality and therefore do not recognize anarcho-capitalism as an anarchist school of thought. In particular, anarchists argue that capitalist transactions are not voluntary and that maintaining the class structure of a capitalist society requires coercion which is incompatible with an anarchist society. The usage of libertarian is also in dispute. While both anarchists and anarcho-capitalists have used it, libertarian was synonymous with anarchist until the mid-20th century, when anarcho-capitalist theory developed. Anarcho-capitalists are distinguished from the dominant anarchist tradition by their relation to property and capital. While both anarchism and anarcho-capitalism share general antipathy towards government authority, anarcho-capitalism favors free-market capitalism. Anarchists, including egoists such as Max Stirner, have supported the protection of an individual's freedom from powers of both government and private property owners. In contrast, while condemning governmental encroachment on personal liberties, anarcho-capitalists support freedoms based on private property rights. Anarcho-capitalist theorist Murray Rothbard argued that protesters should rent a street for protest from its owners. The abolition of public amenities is a common theme in some anarcho-capitalist writings. As anarcho-capitalism puts laissez-faire economics before economic equality, it is commonly viewed as incompatible with the anti-capitalist and egalitarian tradition of anarchism. Although anarcho-capitalist theory implies the abolition of the state in favour of a fully laissez-faire economy, it lies outside the tradition of anarchism. While using the language of anarchism, anarcho-capitalism only shares anarchism's antipathy towards the state and not anarchism's antipathy towards hierarchy as theorists expect from anarcho-capitalist economic power relations. It follows a different paradigm from anarchism and has a fundamentally different approach and goals. In spite of the anarcho- in its title, anarcho-capitalism is more closely affiliated with capitalism, right-libertarianism, and liberalism than with anarchism. Some within this laissez-faire tradition reject the designation of anarcho-capitalism, believing that capitalism may either refer to the laissez-faire market they support or the government-regulated system that they oppose. Rothbard argued that anarcho-capitalism is the only true form of anarchism—the only form of anarchism that could possibly exist in reality as he maintained that any other form presupposes authoritarian enforcement of a political ideology such as "redistribution of private property", which he attributed to anarchism. According to this argument, the capitalist free market is "the natural situation" that would result from people being free from state authority and entails the establishment of all voluntary associations in society such as cooperatives, non-profit organizations, businesses and so on. Moreover, anarcho-capitalists, as well as classical liberal minarchists, argue that the application of anarchist ideals as advocated by what they term "left-wing anarchists" would require an authoritarian body of some sort to impose it. Based on their understanding and interpretation of anarchism, in order to forcefully prevent people from accumulating capital, which they believe is a goal of anarchists, there would necessarily be a redistributive organization of some sort which would have the authority to in essence exact a tax and re-allocate the resulting resources to a larger group of people. They conclude that this theoretical body would inherently have political power and would be nothing short of a state. The difference between such an arrangement and an anarcho-capitalist system is what anarcho-capitalists see as the voluntary nature of organization within anarcho-capitalism contrasted with a "centralized ideology" and a "paired enforcement mechanism" which they believe would be necessary under what they describe as a "coercively" egalitarian-anarchist system. Rothbard also argued that the capitalist system of today is not properly anarchistic because it often colludes with the state. According to Rothbard, "what Marx and later writers have done is to lump together two extremely different and even contradictory concepts and actions under the same portmanteau term. These two contradictory concepts are what I would call 'free-market capitalism' on the one hand, and 'state capitalism' on the other". "The difference between free-market capitalism and state capitalism", writes Rothbard, "is precisely the difference between, on the one hand, peaceful, voluntary exchange, and on the other, violent expropriation". He continues: "State capitalism inevitably creates all sorts of problems which become insoluble". Traditional anarchists reject the notion of capitalism, hierarchies and private property. Albert Meltzer argued that anarcho-capitalism simply cannot be anarchism because capitalism and the state are inextricably interlinked and because capitalism exhibits domineering hierarchical structures such as that between an employer and an employee. Anna Morgenstern approaches this topic from the opposite perspective, arguing that anarcho-capitalists are not really capitalists because "mass concentration of capital is impossible" without the state. According to Jeremy Jennings, "[i]t is hard not to conclude that these ideas," referring to anarcho-capitalism, have "roots deep in classical liberalism" and "are described as anarchist only on the basis of a misunderstanding of what anarchism is." For Jennings, "anarchism does not stand for the untrammelled freedom of the individual (as the 'anarcho-capitalists' appear to believe) but, as we have already seen, for the extension of individuality and community." Similarly, Barbara Goodwin, Emeritus Professor of Politics at the University of East Anglia, Norwich, argues that anarcho-capitalism's "true place is in the group of right-wing libertarians", not in anarchism. Some right-libertarian scholars like Michael Huemer, who identify with the ideology, describe anarcho-capitalism as a "variety of anarchism". British author Andrew Heywood also believes that "individualist anarchism overlaps with libertarianism and is usually linked to a strong belief in the market as a self-regulating mechanism, most obviously manifest in the form of anarcho-capitalism". Frank H. Brooks, author of The Individualist Anarchists: An Anthology of Liberty (1881–1908), believes that "anarchism has always included a significant strain of radical individualism, from the hyperrationalism of Godwin, to the egoism of Stirner, to the libertarians and anarcho-capitalists of today". While both anarchism and anarcho-capitalism are in opposition to the state, it is a necessary but not sufficient condition because anarchists and anarcho-capitalists interpret state-rejection differently. Austrian school economist David Prychitko, in the context of anarcho-capitalism says that "while society without a state is necessary for full-fledged anarchy, it is nevertheless insufficient". According to Ruth Kinna, anarcho-capitalists are anti-statists who draw more on right-wing liberal theory and the Austrian School than anarchist traditions. Kinna writes that "[i]n order to highlight the clear distinction between the two positions", anarchists describe anarcho-capitalists as "propertarians". Anarcho-capitalism is usually seen as part of the New Right. Some anarcho-capitalists argue that, according to them, anarchists consider the word "anarchy" as to be the antithesis of hierarchy, and therefore, that "anarcho-capitalism" is sometimes considered to be a term with differences philosophically to what they personally consider to be true anarchism, as an anarcho-capitalist society would inherently contain hierarchy. Additionally, Rothbard discusses the difference between "government" and "governance" thus, proponents of anarcho-capitalism think the philosophy's common name is indeed consistent, as it promotes private governance, but is vehemently anti-government. Classical liberalism Historian and libertarian Ralph Raico argued that what liberal philosophers "had come up with was a form of individualist anarchism, or, as it would be called today, anarcho-capitalism or market anarchism". He also said that Gustave de Molinari was proposing a doctrine of the private production of security, a position which was later taken up by Murray Rothbard. Some anarcho-capitalists consider Molinari to be the first proponent of anarcho-capitalism. In the preface to the 1977 English translation by Murray Rothbard called The Production of Security the "first presentation anywhere in human history of what is now called anarcho-capitalism", although admitting that "Molinari did not use the terminology, and probably would have balked at the name". Hans-Hermann Hoppe said that "the 1849 article 'The Production of Security' is probably the single most important contribution to the modern theory of anarcho-capitalism". According to Hans-Hermann Hoppe, one of the 19th century precursors of anarcho-capitalism were philosopher Herbert Spencer, classical liberal Auberon Herbert and liberal socialist Franz Oppenheimer. Ruth Kinna credits Murray Rothbard with coining the term anarcho-capitalism, which is – Kinna proposes – to describe "a commitment to unregulated private property and laissez-faire economics, prioritizing the liberty-rights of individuals, unfettered by government regulation, to accumulate, consume and determine the patterns of their lives as they see fit". According to Kinna, anarcho-capitalists "will sometimes label themselves market anarchists because they recognize the negative connotations of 'capitalism'. But the literature of anarcho-capitalism draws on classical liberal theory, particularly the Austrian School – Friedrich von Hayek and Ludwig von Mises – rather than recognizable anarchist traditions. Ayn Rand's laissez-faire, anti-government, corporate philosophy – Objectivism – is sometimes associated with anarcho-capitalism". Other scholars similarly associate anarcho-capitalism with anti-state classical liberalism, neo-classical liberalism, radical neoliberalism and right-libertarianism. Paul Dragos Aligica writes that there is a "foundational difference between the classical liberal and the anarcho-capitalist positions". Classical liberalism, while accepting critical arguments against collectivism, acknowledges a certain level of public ownership and collective governance as necessary to provide practical solutions to political problems. In contrast anarcho-capitalism, according to Aligica, denies any requirement for any form of public administration, and allows no meaningful role for the public sphere, which is seen as sub-optimal and illegitimate. Individualist anarchism Murray Rothbard, a student of Ludwig von Mises, stated that he was influenced by the work of the 19th-century American individualist anarchists. In the winter of 1949, Rothbard decided to reject minimal state laissez-faire and embrace his interpretation of individualist anarchism. In 1965, Rothbard wrote that "Lysander Spooner and Benjamin R. Tucker were unsurpassed as political philosophers and nothing is more needed today than a revival and development of the largely forgotten legacy they left to political philosophy". However, Rothbard thought that they had a faulty understanding of economics as the 19th-century individualist anarchists had a labor theory of value as influenced by the classical economists, while Rothbard was a student of Austrian School economics which does not agree with the labor theory of value. Rothbard sought to meld 19th-century American individualist anarchists' advocacy of economic individualism and free markets with the principles of Austrian School economics, arguing that "[t]here is, in the body of thought known as 'Austrian economics', a scientific explanation of the workings of the free market (and of the consequences of government intervention in that market) which individualist anarchists could easily incorporate into their political and social Weltanschauung". Rothbard held that the economic consequences of the political system they advocate would not result in an economy with people being paid in proportion to labor amounts, nor would profit and interest disappear as they expected. Tucker thought that unregulated banking and money issuance would cause increases in the money supply so that interest rates would drop to zero or near to it. Peter Marshall states that "anarcho-capitalism overlooks the egalitarian implications of traditional individualist anarchists like Spooner and Tucker". Stephanie Silberstein states that "While Spooner was no free-market capitalist, nor an anarcho-capitalist, he was not as opposed to capitalism as most socialists were." In "The Spooner-Tucker Doctrine: An Economist's View", Rothbard explained his disagreements. Rothbard disagreed with Tucker that it would cause the money supply to increase because he believed that the money supply in a free market would be self-regulating. If it were not, then Rothbard argued inflation would occur so it is not necessarily desirable to increase the money supply in the first place. Rothbard claimed that Tucker was wrong to think that interest would disappear regardless because he believed people, in general, do not wish to lend their money to others without compensation, so there is no reason why this would change just because banking was unregulated. Tucker held a labor theory of value and thought that in a free market people would be paid in proportion to how much labor they exerted and that exploitation or usury was taking place if they were not. As Tucker explained in State Socialism and Anarchism, his theory was that unregulated banking would cause more money to be available and that this would allow the proliferation of new businesses which would, in turn, raise demand for labor. This led Tucker to believe that the labor theory of value would be vindicated and equal amounts of labor would receive equal pay. As an Austrian School economist, Rothbard did not agree with the labor theory and believed that prices of goods and services are proportional to marginal utility rather than to labor amounts in the free market. As opposed to Tucker he did not think that there was anything exploitative about people receiving an income according to how much "buyers of their services value their labor" or what that labor produces. Without the labor theory of value, some argue that 19th-century individualist anarchists approximate the modern movement of anarcho-capitalism, although this has been contested or rejected. As economic theory changed, the popularity of the labor theory of classical economics was superseded by the subjective theory of value of neoclassical economics and Rothbard combined Mises' Austrian School of economics with the absolutist views of human rights and rejection of the state he had absorbed from studying the individualist American anarchists of the 19th century such as Tucker and Spooner. In the mid-1950s, Rothbard wrote an unpublished article named "Are Libertarians 'Anarchists'?" under the pseudonym "Aubrey Herbert", concerned with differentiating himself from communist and socialistic economic views of anarchists, including the individualist anarchists of the 19th century, concluding that "we are not anarchists and that those who call us anarchists are not on firm etymological ground and are being completely unhistorical. On the other hand, it is clear that we are not archists either: we do not believe in establishing a tyrannical central authority that will coerce the noninvasive as well as the invasive. Perhaps, then, we could call ourselves by a new name: nonarchist." Joe Peacott, an American individualist anarchist in the mutualist tradition, criticizes anarcho-capitalists for trying to hegemonize the individualist anarchism label and make appear as if all individualist anarchists are in favor of capitalism. Peacott states that "individualists, both past and present, agree with the communist anarchists that present-day capitalism is based on economic coercion, not on voluntary contract. Rent and interest are the mainstays of modern capitalism and are protected and enforced by the state. Without these two unjust institutions, capitalism could not exist". Anarchist activists and scholars do not consider anarcho-capitalism as a part of the anarchist movement, arguing that anarchism has historically been an anti-capitalist movement and see it as incompatible with capitalist forms. Although some regard anarcho-capitalism as a form of individualist anarchism, many others disagree or contest the existence of an individualist–socialist divide. In coming to terms that anarchists mostly identified with socialism, Rothbard wrote that individualist anarchism is different from anarcho-capitalism and other capitalist theories due to the individualist anarchists retaining the labor theory of value and socialist doctrines. Similarly, many writers deny that anarcho-capitalism is a form of anarchism or that capitalism is compatible with anarchism. The Palgrave Handbook of Anarchism writes that "[a]s Benjamin Franks rightly points out, individualisms that defend or reinforce hierarchical forms such as the economic-power relations of anarcho-capitalism are incompatible with practices of social anarchism based on developing immanent goods which contest such as inequalities". Laurence Davis cautiously asks "[I]s anarcho-capitalism really a form of anarchism or instead a wholly different ideological paradigm whose adherents have attempted to expropriate the language of anarchism for their own anti-anarchist ends?" Davis cites Iain McKay, "whom Franks cites as an authority to support his contention that 'academic analysis has followed activist currents in rejecting the view that anarcho-capitalism has anything to do with social anarchism, as arguing "quite emphatically on the very pages cited by Franks that anarcho-capitalism is by no means a type of anarchism". McKay writes that "[i]t is important to stress that anarchist opposition to the so-called capitalist 'anarchists' does not reflect some kind of debate within anarchism, as many of these types like to pretend, but a debate between anarchism and its old enemy capitalism. ... Equally, given that anarchists and 'anarcho'-capitalists have fundamentally different analyses and goals it is hardly 'sectarian' to point this out". Davis writes that "Franks asserts without supporting evidence that most major forms of individualist anarchism have been largely anarcho-capitalist in content, and concludes from this premise that most forms of individualism are incompatible with anarchism". Davis argues that "the conclusion is unsustainable because the premise is false, depending as it does for any validity it might have on the further assumption that anarcho-capitalism is indeed a form of anarchism. If we reject this view, then we must also reject the individual anarchist versus the communal anarchist 'chasm' style of argument that follows from it". Davis maintains that "the ideological core of anarchism is the belief that society can and should be organised without hierarchy and domination. Historically, anarchists have struggles against a wide range of regimes of domination, from capitalism, the state system, patriarchy, heterosexism, and the domination of nature to colonialism, the war system, slavery, fascism, white supremacy, and certain forms of organised religion". According to Davis, "[w]hile these visions range from the predominantly individualistic to the predominantly communitarian, features common to virtually all include an emphasis on self-management and self-regulatory methods of organisation, voluntary association, decentralised society, based on the principle of free association, in which people will manage and govern themselves". Finally, Davis includes a footnote stating that "[i]ndividualist anarchism may plausibly be re regarded as a form of both socialism and anarchism. Whether the individualist anarchists were consistent anarchists (and socialists) is another question entirely. ... McKay comments as follows: 'any individualist anarchism which supports wage labour is inconsistent anarchism. It can easily be made consistent anarchism by applying its own principles consistently. In contrast 'anarcho'-capitalism rejects so many of the basic, underlying, principles of anarchism ... that it cannot be made consistent with the ideals of anarchism. Historical precedents Several anarcho-capitalists and right-libertarians have discussed historical precedents of what they believe were examples of anarcho-capitalism. Free cities of medieval Europe Economist and libertarian scholar Bryan Caplan considers the free cities of medieval Europe as examples of "anarchist" or "nearly anarchistic" societies, further arguing: Medieval Iceland According to the libertarian theorist David D. Friedman, "[m]edieval Icelandic institutions have several peculiar and interesting characteristics; they might almost have been invented by a mad economist to test the lengths to which market systems could supplant government in its most fundamental functions". While not directly labeling it anarcho-capitalist, Friedman argues that the legal system of the Icelandic Commonwealth comes close to being a real-world anarcho-capitalist legal system. Although noting that there was a single legal system, Friedman argues that enforcement of the law was entirely private and highly capitalist, providing some evidence of how such a society would function. Friedman further wrote that "[e]ven where the Icelandic legal system recognized an essentially 'public' offense, it dealt with it by giving some individual (in some cases chosen by lot from those affected) the right to pursue the case and collect the resulting fine, thus fitting it into an essentially private system". Friedman and Bruce L. Benson argued that the Icelandic Commonwealth saw significant economic and social progress in the absence of systems of criminal law, an executive, or bureaucracy. This commonwealth was led by chieftains, whose position could be bought and sold like that of private property. Being a member of the chieftainship was also completely voluntary. American Old West According to Terry L. Anderson and P. J. Hill, the Old West in the United States in the period of 1830 to 1900 was similar to anarcho-capitalism in that "private agencies provided the necessary basis for an orderly society in which property was protected and conflicts were resolved" and that the common popular perception that the Old West was chaotic with little respect for property rights is incorrect. Since squatters had no claim to western lands under federal law, extra-legal organizations formed to fill the void. Benson explains: According to Anderson, "[d]efining anarcho-capitalist to mean minimal government with property rights developed from the bottom up, the western frontier was anarcho-capitalistic. People on the frontier invented institutions that fit the resource constraints they faced". Gaelic Ireland In his work For a New Liberty, Murray Rothbard has claimed ancient Gaelic Ireland as an example of nearly anarcho-capitalist society. In his depiction, citing the work of Professor Joseph Peden, the basic political unit of ancient Ireland was the tuath, which is portrayed as "a body of persons voluntarily united for socially beneficial purposes" with its territorial claim being limited to "the sum total of the landed properties of its members". Civil disputes were settled by private arbiters called "brehons" and the compensation to be paid to the wronged party was insured through voluntary surety relationships. Commenting on the "kings" of tuaths, Rothbard stated: Law merchant, admiralty law, and early common law Some libertarians have cited law merchant, admiralty law and early common law as examples of anarcho-capitalism. In his work Power and Market, Rothbard stated: Somalia from 1991 to 2006 Economist Alex Tabarrok argued that Somalia in its stateless period provided a "unique test of the theory of anarchy", in some aspects near of that espoused by anarcho-capitalists David D. Friedman and Murray Rothbard. Nonetheless, both anarchists and some anarcho-capitalists argue that Somalia was not an anarchist society. Analysis and criticism State, justice and defense Anarchists such as Brian Morris argue that anarcho-capitalism does not in fact get rid of the state. He says that anarcho-capitalists "simply replaced the state with private security firms, and can hardly be described as anarchists as the term is normally understood". In "Libertarianism: Bogus Anarchy", anarchist Peter Sabatini notes: Similarly, Bob Black argues that an anarcho-capitalist wants to "abolish the state to his own satisfaction by calling it something else". He states that they do not denounce what the state does, they just "object to who's doing it". Paul Birch argues that legal disputes involving several jurisdictions and different legal systems will be too complex and costly. He therefore argues that anarcho-capitalism is inherently unstable, and would evolve, entirely through the operation of free market forces, into either a single dominant private court with a natural monopoly of justice over the territory (a de facto state), a society of multiple city states, each with a territorial monopoly, or a 'pure anarchy' that would rapidly descend into chaos. Randall G. Holcombe argues that anarcho-capitalism turns justice into a commodity as private defense and court firms would favour those who pay more for their services. He argues that defense agencies could form cartels and oppress people without fear of competition. Philosopher Albert Meltzer argued that since anarcho-capitalism promotes the idea of private armies, it actually supports a "limited State". He contends that it "is only possible to conceive of Anarchism which is free, communistic and offering no economic necessity for repression of countering it". Libertarian Robert Nozick argues that a competitive legal system would evolve toward a monopoly government—even without violating individuals' rights in the process. In Anarchy, State, and Utopia, Nozick defends minarchism and argues that an anarcho-capitalist society would inevitably transform into a minarchist state through the eventual emergence of a monopolistic private defense and judicial agency that no longer faces competition. He argues that anarcho-capitalism results in an unstable system that would not endure in the real world. While anarcho-capitalists such as Roy Childs and Murray Rothbard have rejected Nozick's arguments, with Rothbard arguing that the process described by Nozick, with the dominant protection agency outlawing its competitors, in fact violates its own clients' rights, John Jefferson actually advocates Nozick's argument and states that such events would best operate in laissez-faire. Robert Ellickson presented a Hayekian case against anarcho-capitalism, calling it a "pipe-dream" and stating that anarcho-capitalists "by imagining a stable system of competing private associations, ignore both the inevitability of territorial monopolists in governance, and the importance of institutions to constrain those monopolists' abuses". Some libertarians argue that anarcho-capitalism would result in different standards of justice and law due to relying too much on the market. Friedman responded to this criticism by arguing that it assumes the state is controlled by a majority group that has similar legal ideals. If the populace is diverse, different legal standards would therefore be appropriate. Rights and freedom Negative and positive rights are rights that oblige either action (positive rights) or inaction (negative rights). Anarcho-capitalists believe that negative rights should be recognized as legitimate, but positive rights should be rejected as an intrusion. Some critics reject the distinction between positive and negative rights. Peter Marshall also states that the anarcho-capitalist definition of freedom is entirely negative and that it cannot guarantee the positive freedom of individual autonomy and independence. About anarcho-capitalism, anarcho-syndicalist and anti-capitalist intellectual Noam Chomsky says: Economics and property Social anarchists argue that anarcho-capitalism allows individuals to accumulate significant power through free markets and private property. Friedman responded by arguing that the Icelandic Commonwealth was able to prevent the wealthy from abusing the poor by requiring individuals who engaged in acts of violence to compensate their victims financially. Anarchists argue that certain capitalist transactions are not voluntary and that maintaining the class structure of a capitalist society requires coercion which violates anarchist principles. Anthropologist David Graeber noted his skepticism about anarcho-capitalism along the same lines, arguing: Some critics argue that the anarcho-capitalist concept of voluntary choice ignores constraints due to both human and non-human factors such as the need for food and shelter as well as active restriction of both used and unused resources by those enforcing property claims. If a person requires employment in order to feed and house himself, the employer-employee relationship could be considered involuntary. Another criticism is that employment is involuntary because the economic system that makes it necessary for some individuals to serve others is supported by the enforcement of coercive private property relations. Some philosophies view any ownership claims on land and natural resources as immoral and illegitimate. Objectivist philosopher Harry Binswanger criticizes anarcho-capitalism by arguing that "capitalism requires government", questioning who or what would enforce treaties and contracts. Some right-libertarian critics of anarcho-capitalism who support the full privatization of capital such as geolibertarians argue that land and the raw materials of nature remain a distinct factor of production and cannot be justly converted to private property because they are not products of human labor. Some socialists, including market anarchists and mutualists, adamantly oppose absentee ownership. Anarcho-capitalists have strong abandonment criteria, namely that one maintains ownership until one agrees to trade or gift it. Anti-state critics of this view posit comparatively weak abandonment criteria, arguing that one loses ownership when one stops personally occupying and using it as well as the idea of perpetually binding original appropriation is anathema to traditional schools of anarchism. Literature The following is a partial list of notable nonfiction works discussing anarcho-capitalism. Bruce L. Benson, The Enterprise of Law: Justice Without The State To Serve and Protect: Privatization and Community in Criminal Justice David D. Friedman, The Machinery of Freedom Edward P. Stringham, Anarchy and the Law: The Political Economy of Choice George H. Smith, "Justice Entrepreneurship in a Free Market" Gerard Casey, Libertarian Anarchy: Against the State Hans-Hermann Hoppe, Anarcho-Capitalism: An Annotated Bibliography A Theory of Socialism and Capitalism Democracy: The God That Failed The Economics and Ethics of Private Property Linda and Morris Tannehill, The Market for Liberty Michael Huemer, The Problem of Political Authority Murray Rothbard, founder of anarcho-capitalism: For a New Liberty Man, Economy, and State Power and Market The Ethics of Liberty See also Agorism Anarcho-capitalism and minarchism Consequentialist libertarianism Counter-economics Creative disruption Crypto-anarchism Definition of anarchism and libertarianism Issues in anarchism Left-wing market anarchism Natural-rights libertarianism Privatization in criminal justice Propertarianism Stateless society The Libertarian Forum Voluntaryism Notes References Further reading Brown, Susan Love (1997). "The Free Market as Salvation from Government: The Anarcho-Capitalist View". In Carrier, James G., ed. Meanings of the Market: The Free Market in Western Culture (illustrated ed.). Oxford: Berg Publishers. p. 99. . External links Anarcho-capitalist FAQ LewRockwell.com – website run by Lew Rockwell Mises Institute – research and educational center of classical liberalism, including anarcho-capitalism, Austrian School of economics and American libertarian political theory Property and Freedom Society – international anarcho-capitalist society Strike The Root – an anarcho-capitalist website featuring essays, news, and a forum Austrian School Capitalist systems Economic ideologies Anarcho-capitalism Ideologies of capitalism Classical liberalism Libertarianism by form Political ideologies Right-libertarianism Syncretic political movements Murray Rothbard	9
Aristophanes (; , ; c. 446 – c. 386 BC), son of Philippus, of the deme Kydathenaion (), was a comic playwright or comedy-writer of ancient Athens and a poet of Old Attic Comedy. Eleven of his forty plays survive virtually complete. These provide the most valuable examples of a genre of comic drama known as Old Comedy and are used to define it, along with fragments from dozens of lost plays by Aristophanes and his contemporaries. Also known as "The Father of Comedy" and "the Prince of Ancient Comedy", Aristophanes has been said to recreate the life of ancient Athens more convincingly than any other author. His powers of ridicule were feared and acknowledged by influential contemporaries; Plato singled out Aristophanes' play The Clouds as slander that contributed to the trial and subsequent condemning to death of Socrates, although other satirical playwrights had also caricatured the philosopher. Aristophanes' second play, The Babylonians (now lost), was denounced by Cleon as a slander against the Athenian polis. It is possible that the case was argued in court, but details of the trial are not recorded and Aristophanes caricatured Cleon mercilessly in his subsequent plays, especially The Knights, the first of many plays that he directed himself. "In my opinion," he says through that play's Chorus, "the author-director of comedies has the hardest job of all." Etymology Aristophanes's name means 'one who appears best', from the Greek 'ἄριστος' (Aristos) meaning "best" and 'φαίνομαι', meaning "appear". Biography Less is known about Aristophanes than about his plays. In fact, his plays are the main source of information about him and his life. It was conventional in Old Comedy for the chorus to speak on behalf of the author during an address called the parabasis and thus some biographical facts can be found there. However, these facts relate almost entirely to his career as a dramatist and the plays contain few clear and unambiguous clues about his personal beliefs or his private life. He was a comic poet in an age when it was conventional for a poet to assume the role of teacher (didaskalos), and though this specifically referred to his training of the Chorus in rehearsal, it also covered his relationship with the audience as a commentator on significant issues. Aristophanes claimed to be writing for a clever and discerning audience, yet he also declared that "other times" would judge the audience according to its reception of his plays. He sometimes boasts of his originality as a dramatist yet his plays consistently espouse opposition to radical new influences in Athenian society. He caricatured leading figures in the arts (notably Euripides, whose influence on his own work however he once grudgingly acknowledged), in politics (especially the populist Cleon), and in philosophy/religion (where Socrates was the most obvious target). Such caricatures seem to imply that Aristophanes was an old-fashioned conservative, yet that view of him leads to contradictions. It has been argued that Aristophanes produced plays mainly to entertain the audience and to win prestigious competitions. His plays were written for production at the great dramatic festivals of Athens, the Lenaia and City Dionysia, where they were judged and awarded prizes in competition with the works of other comic dramatists. An elaborate series of lotteries, designed to prevent prejudice and corruption, reduced the voting judges at the City Dionysia to just five. These judges probably reflected the mood of the audiences yet there is much uncertainty about the composition of those audiences. The theatres were certainly huge, with seating for at least 10,000 at the Theatre of Dionysus. The day's program at the City Dionysia for example was crowded, with three tragedies and a satyr play ahead of a comedy, but it is possible that many of the poorer citizens (typically the main supporters of demagogues like Cleon) occupied the festival holiday with other pursuits. The conservative views expressed in the plays might therefore reflect the attitudes of the dominant group in an unrepresentative audience. The production process might also have influenced the views expressed in the plays. Throughout most of Aristophanes' career, the Chorus was essential to a play's success and it was recruited and funded by a choregus, a wealthy citizen appointed to the task by one of the archons. A choregus could regard his personal expenditure on the Chorus as a civic duty and a public honour, but Aristophanes showed in The Knights that wealthy citizens might regard civic responsibilities as punishment imposed on them by demagogues and populists like Cleon. Thus the political conservatism of the plays may reflect the views of the wealthiest section of Athenian society, on whose generosity all dramatists depended for putting on their plays. When Aristophanes' first play The Banqueters was produced, Athens was an ambitious, imperial power and the Peloponnesian War was only in its fourth year. His plays often express pride in the achievement of the older generation (the victors at Marathon) yet they are not jingoistic, and they are staunchly opposed to the war with Sparta. The plays are particularly scathing in criticism of war profiteers, among whom populists such as Cleon figure prominently. By the time his last play was produced (around 386 BC) Athens had been defeated in war, its empire had been dismantled and it had undergone a transformation from being the political to the intellectual centre of Greece. Aristophanes was part of this transformation and he shared in the intellectual fashions of the period—the structure of his plays evolves from Old Comedy until, in his last surviving play, Wealth II, it more closely resembles New Comedy. However it is uncertain whether he led or merely responded to changes in audience expectations. Aristophanes won second prize at the City Dionysia in 427 BC with his first play The Banqueters (now lost). He won first prize there with his next play, The Babylonians (also now lost). It was usual for foreign dignitaries to attend the City Dionysia, and The Babylonians caused some embarrassment for the Athenian authorities since it depicted the cities of the Delian League as slaves grinding at a mill. Some influential citizens, notably Cleon, reviled the play as slander against the polis and possibly took legal action against the author. The details of the trial are unrecorded but, speaking through the hero of his third play The Acharnians (staged at the Lenaia, where there were few or no foreign dignitaries), the poet carefully distinguishes between the polis and the real targets of his acerbic wit: Aristophanes repeatedly savages Cleon in his later plays. But these satirical diatribes appear to have had no effect on Cleon's political career—a few weeks after the performance of The Knights—a play full of anti-Cleon jokes—Cleon was elected to the prestigious board of ten generals. Cleon also seems to have had no real power to limit or control Aristophanes: the caricatures of him continued up to and even beyond his death. In the absence of clear biographical facts about Aristophanes, scholars make educated guesses based on interpretation of the language in the plays. Inscriptions and summaries or comments by Hellenistic and Byzantine scholars can also provide useful clues. We know from a combination of these sources, and especially from comments in The Knights and The Clouds, that Aristophanes' first three plays were not directed by him; they were instead directed by Callistratus and Philoneides, an arrangement that seemed to suit Aristophanes since he appears to have used these same directors in many later plays as well (Philoneides for example later directed The Frogs and he was also credited, perhaps wrongly, with directing The Wasps). Aristophanes's use of directors complicates our reliance on the plays as sources of biographical information, because apparent self-references might have been made with reference to his directors instead. Thus, for example, a statement by the chorus in The Acharnians seems to indicate that the "poet" had a close, personal association with the island of Aegina. Similarly, the hero in The Acharnians complains about Cleon "dragging me into court" over "last year's play." Comments made by the Chorus referring to Aristophanes in The Clouds have been interpreted as evidence that he can hardly have been more than 18 years old when his first play The Banqueters was produced. The second parabasis in Wasps appears to indicate that he reached some kind of temporary accommodation with Cleon following either the controversy over The Babylonians or a subsequent controversy over The Knights. It has been inferred from statements in The Clouds and Peace that Aristophanes was prematurely bald. Aristophanes was probably victorious at least once at the City Dionysia, with Babylonians in 427, and at least three times at the Lenaia, with The Acharnians in 425, Knights in 424, and Frogs in 405. Frogs in fact won the unique distinction of a repeat performance at a subsequent festival. A son of Aristophanes, Araros, was also a comic poet and he could have been heavily involved in the production of his father's play Wealth II in 388. Araros is also thought to have been responsible for the posthumous performances of the now lost plays Aeolosicon II and Cocalus, and it is possible that the last of these won the prize at the City Dionysia in 387. It appears that a second son, Philippus, was twice victorious at the Lenaia and he could have directed some of Eubulus’ comedies. A third son was called either Nicostratus or Philetaerus, and a man by the latter name appears in the catalogue of Lenaia victors with two victories, the first probably in the late 370s. Plato's The Symposium appears to be a useful source of biographical information about Aristophanes, but its reliability is open to doubt. It purports to be a record of conversations at a dinner party at which both Aristophanes and Socrates are guests, held some seven years after the performance of The Clouds, the play in which Socrates was cruelly caricatured. One of the guests, Alcibiades, even quotes from the play when teasing Socrates over his appearance and yet there is no indication of any ill-feeling between Socrates and Aristophanes. Plato's Aristophanes is in fact a genial character and this has been interpreted as evidence of Plato's own friendship with him (their friendship appears to be corroborated by an epitaph for Aristophanes, reputedly written by Plato, in which the playwright's soul is compared to an eternal shrine for the Graces). Plato was only a boy when the events in The Symposium are supposed to have occurred and it is possible that his Aristophanes is in fact based on a reading of the plays. For example, conversation among the guests turns to the subject of Love and Aristophanes explains his notion of it in terms of an amusing allegory, a device he often uses in his plays. He is represented as suffering an attack of hiccups and this might be a humorous reference to the crude physical jokes in his plays. He tells the other guests that he is quite happy to be thought amusing but he is wary of appearing ridiculous. This fear of being ridiculed is consistent with his declaration in The Knights that he embarked on the career of comic playwright warily after witnessing the public contempt and ridicule that other dramatists had incurred. Aristophanes survived The Peloponnesian War, two oligarchic revolutions and two democratic restorations; this has been interpreted as evidence that he was not actively involved in politics, despite his highly political plays. He was probably appointed to the Council of Five Hundred for a year at the beginning of the fourth century, but such appointments were very common in democratic Athens. Use of language The language of Aristophanes' plays, and in Old Comedy generally, was valued by ancient commentators as a model of the Attic dialect. The orator Quintilian believed that the charm and grandeur of the Attic dialect made Old Comedy an example for orators to study and follow, and he considered it inferior in these respects only to the works of Homer. A revival of interest in the Attic dialect may have been responsible for the recovery and circulation of Aristophanes' plays during the fourth and fifth centuries AD, resulting in their survival today. In Aristophanes' plays, the Attic dialect is couched in verse and his plays can be appreciated for their poetic qualities. For Aristophanes' contemporaries the works of Homer and Hesiod formed the cornerstones of Hellenic history and culture. Thus poetry had a moral and social significance that made it an inevitable topic of comic satire. Aristophanes was very conscious of literary fashions and traditions and his plays feature numerous references to other poets. These include not only rival comic dramatists such as Eupolis and Hermippus and predecessors such as Magnes, Crates and Cratinus, but also tragedians, notably Aeschylus, Sophocles and Euripides, all three of whom are mentioned in e.g. The Frogs. Aristophanes was the equal of these great tragedians in his subtle use of lyrics. He appears to have modelled his approach to language on that of Euripides in particular, so much so that the comic dramatist Cratinus labelled him a 'Euripidaristophanist' addicted to hair-splitting niceties. A full appreciation of Aristophanes' plays requires an understanding of the poetic forms he employed with virtuoso skill, and of their different rhythms and associations. There were three broad poetic forms: iambic dialogue, tetrameter verses and lyrics: Iambic dialogue: Aristophanes achieves an effect resembling natural speech through the use of the iambic trimeter (corresponding to the effects achieved by English poets such as Shakespeare using iambic pentameters). His realistic use of the meter makes it ideal for both dialogue and soliloquy, as for instance in the prologue, before the arrival of the Chorus, when the audience is introduced to the main issues in the plot. The Acharnians opens with these three lines by the hero, Dikaiopolis (rendered here in English as iambic pentameters): How many are the things that vex my heart! Pleasures are few, so very few – just four – But stressful things are manysandthousandsandheaps! Here Aristophanes employs a frequent device, arranging the syntax so that the final word in a line comes as a comic climax. The hero's pleasures are so few he can number them (, four) but his causes for complaint are so many they beggar numerical description and he must invent his own word for them (, literally "sandhundredheaps", here paraphrased "manysandthousandsandheaps"). The use of invented compound words is another comic device frequently found in the plays. Tetrameter catalectic verses: These are long lines of anapests, trochees or iambs (where each line is ideally measured in four dipodes or pairs of feet), used in various situations within each play such as: formal debates or agons between characters (typically in anapestic rhythm); excited dialogue or heated argument (typically trochaic rhythm, the same as in early tragedy); long speeches declaimed by the Chorus in parabases (in either anapestic or trochaic rhythms); informal debates barely above the level of ordinary dialogue (typically iambic). Anapestic rhythms are naturally jaunty (as in many limericks) and trochaic meter is suited to rapid delivery (the word "trochee" is in fact derived from trechein, "to run", as demonstrated for example by choruses who enter at speed, often in aggressive mood) However, even though both these rhythms can seem to "bowl along" Aristophanes often varies them through use of complex syntax and substituted meters, adapting the rhythms to the requirements of serious argument. In an anapestic passage in The Frogs, for instance, the character Aeschylus presents a view of poetry that is supposed to be serious but which leads to a comic interruption by the god, Dionysus: AES.:It was Orpheus singing who taught us religion and how wrong people are when they kill, And we learned from Musaeus medicinal cures and the science of divination. If it's farming you want, Hesiod knows it all, when to plant, when to harvest. How godlike Homer got to be famous, I'll tell if you ask: he taught us what all good men should know, Discipline, fortitude, battle-readiness. DIO.: But no-one taught Pantocles – yesterday He was marching his men up and down on parade when the crest of his helmet fell off! The rhythm begins at a typical anapestic gallop, slows down to consider the revered poets Hesiod and Homer, then gallops off again to its comic conclusion at the expense of the unfortunate Pantocles. Such subtle variations in rhythm are common in the plays, allowing for serious points to be made while still whetting the audience's appetite for the next joke. Lyrics: Almost nothing is known about the music that accompanied Greek lyrics, and the meter is often so varied and complex that it is difficult for modern readers or audiences to get a feel for the intended effects, yet Aristophanes still impresses with the charm and simplicity of his lyrics. Some of the most memorable and haunting lyrics are dignified hymns set free of the comic action. In the example below, taken from The Wasps, the lyric is merely a comic interlude and the rhythm is steadily trochaic. The syntax in the original Greek is natural and unforced and it was probably accompanied by brisk and cheerful music, gliding to a concluding pun at the expense of Amynias, who is thought to have lost his fortune gambling. Though to myself I often seem A bright chap and not awkward, None comes close to Amynias, Son of Sellos of the Bigwig Clan, a man I once saw Dine with rich Leogorus. Now as poor as Antiphon, He lives on apples and pomegranates Yet he got himself appointed Ambassador to Pharsalus, Way up there in Thessaly, Home of the poor Penestes: Happy to be where everyone Is as penniless as he is! The pun here in English translation (Penestes–penniless) is a weak version of the Greek pun , Penéstaisi-penéstĕs, "destitute". Many of the puns in the plays are based on words that are similar rather than identical, and it has been observed that there could be more of them than scholars have yet been able to identify. Others are based on double meanings. Sometimes entire scenes are constructed on puns, as in The Acharnians with the Megarian farmer and his pigs: the Megarian farmer defies the Athenian embargo against Megarian trade, and tries to trade his daughters disguised as pigs, except "pig" was ancient slang for "vagina". Since the embargo against Megara was the pretext for the Peloponnesian War, Aristophanes naturally concludes that this whole mess happened because of "three cunts". It can be argued that the most important feature of the language of the plays is imagery, particularly the use of similes, metaphors and pictorial expressions. In The Knights, for example, the ears of a character with selective hearing are represented as parasols that open and close. In The Frogs, Aeschylus is said to compose verses in the manner of a horse rolling in a sandpit. Some plays feature revelations of human perfectibility that are poetic rather than religious in character, such as the marriage of the hero Pisthetairos to Zeus's paramour in The Birds and the "recreation" of old Athens, crowned with roses, at the end of The Knights. Rhetoric It is widely believed that Aristophanes condemned rhetoric on both moral and political grounds. He states, "a speaker trained in the new rhetoric may use his talents to deceive the jury and bewilder his opponents so thoroughly that the trial loses all semblance of fairness" He is speaking to the "art" of flattery, and evidence points towards the fact that many of Aristophanes' plays were actually created with the intent to attack the view of rhetoric. The most noticeable attack can be seen in his play Banqueters, in which two brothers from different educational backgrounds argue over which education is better. One brother comes from a background of "old-fashioned" education while the other brother appears to be a product of the sophistic education The chorus was mainly used by Aristophanes as a defense against rhetoric and would often talk about topics such as the civic duty of those who were educated in classical teachings. In Aristophanes' opinion it was the job of those educated adults to protect the public from deception and to stand as a beacon of light for those who were more gullible than others. One of the main reasons why Aristophanes was so against the sophists came into existence from the requirements listed by the leaders of the organization. Money was essential, which meant that roughly all of the pupils studying with the sophists came from upper-class backgrounds and excluded the rest of the polis. Aristophanes believed that education and knowledge was a public service and that anything that excluded willing minds was nothing but an abomination. He concludes that all politicians that study rhetoric must have "doubtful citizenships, unspeakable morals, and too much arrogance". Aristophanes and Old Comedy The plays of Aristophanes are among the defining examples of Old Comedy. Aristophanes' plays are also the only full length Old Comedy plays that have survived from antiquity. Thus making them literally among the most defining elements, for defining Old Comedy... For this reason, an understanding of Old Comedy and Aristophanes' place in it is useful to comprehend his plays in their historical and cultural context. The themes of Old Comedy included: Inclusive comedy: Old Comedy provided a variety of entertainments for a diverse audience. It accommodated a serious purpose, light entertainment, hauntingly beautiful lyrics, the buffoonery of puns and invented words, obscenities, disciplined verse, wildly absurd plots and a formal, dramatic structure. Fantasy and absurdity: Fantasy in Old Comedy is unrestricted and impossibilities are ignored. Situations are developed logically to absurd conclusions, an approach to humour that is echoed for instance in the works of Lewis Carroll and Eugène Ionesco (the Theatre of the Absurd). The crazy costume worn by Dionysus in The Frogs is typical of an absurd result obtained on logical grounds—he wears a woman's saffron-coloured tunic because effeminacy is an aspect of his divinity, buskin boots because he is interested in reviving the art of tragedy, and a lion skin cape because, like Heracles, his mission leads him into Hades. Absurdities develop logically from initial premises in a plot. In The Knights for instance, Cleon's corrupt service to the people of Athens is originally depicted as a household relationship in which the slave dupes his master. The introduction of a rival, who is not a member of the household, leads to an absurd shift in the metaphor, so that Cleon and his rival become erastai competing for the affections of an eromenos, hawkers of oracles competing for the attention of a credulous public, athletes in a race for approval and orators competing for the popular vote. The resourceful hero: In Aristophanic comedy, the hero is an independent-minded and self-reliant individual. He has something of the ingenuity of Homer's Odysseus and much of the shrewdness of the farmer idealized in Hesiod's Works and Days, subjected to corrupt leaders and unreliable neighbours. Typically he devises a complicated and highly fanciful escape from an intolerable situation. Thus Dikaiopolis in The Acharnians contrives a private peace treaty with the Spartans; Bdelucleon in The Wasps turns his own house into a private law court in order to keep his jury-addicted father safely at home; Trygaeus in Peace flies to Olympus on a giant dung beetle to obtain an end to the Peloponnesian War; Pisthetairus in Birds sets off to establish his own colony and becomes instead the ruler of the bird kingdom and a rival to the gods. The resourceful cast: The numerous surprising developments in an Aristophanic plot, the changes in scene, and the farcical comings and goings of minor characters towards the end of a play, were managed according to theatrical convention with only three principal actors (a fourth actor, often the leader of the chorus, was permitted to deliver short speeches). Songs and addresses to the audience by the Chorus gave the actors hardly enough time off-stage to draw breath and to prepare for changes in scene. Complex structure: The action of an Aristophanic play obeyed a crazy logic of its own and yet it always unfolded within a formal, dramatic structure that was repeated with minor variations from one play to another. The different, structural elements are associated with different poetic meters and rhythms and these are generally lost in English translations. Dramatic structure of Aristophanes' plots The structural elements of a typical Aristophanic plot can be summarized as follows: prologue – an introductory scene with a dialogue and/or soliloquy addressed to the audience, expressed in iambic trimeter and explaining the situation that is to be resolved in the play; parodos – the arrival of the chorus, dancing and singing, sometimes followed by a choreographed skirmish with one or more actors, often expressed in long lines of tetrameters; symmetrical scenes – passages featuring songs and declaimed verses in long lines of tetrameters, arranged symmetrically in two sections such that each half resembles the other in meter and line length; the agon and parabasis can be considered specific instances of symmetrical scenes: parabasis – verses through which the Chorus addresses the audience directly, firstly in the middle of the play and again near the end (see the section below, Parabasis); agon – a formal debate that decides the outcome of the play, typically in anapestic tetrameter, though iambs are sometimes used to delineate inferior arguments; episodes – sections of dialogue in iambic trimeter, often in a succession of scenes featuring minor characters towards the end of a play; songs ('strophes'/'antistrophes' or 'odes'/'antodes') – often in symmetrical pairs where each half has the same meter and number of lines as the other, used as transitions between other structural elements, or between scenes while actors change costume, and often commenting on the action; exodus – the departure of the Chorus and the actors, in song and dance celebrating the hero's victory and sometimes celebrating a symbolic marriage. The rules of competition did not prevent a playwright arranging and adjusting these elements to suit his particular needs. In The Acharnians and Peace, for example, there is no formal agon whereas in The Clouds there are two agons. Parabasis The parabasis is an address to the audience by the chorus or chorus leader while the actors leave or have left the stage. In this role, the chorus is sometimes out of character, as the author's voice, and sometimes in character, although these capacities are often difficult to distinguish. Generally the parabasis occurs somewhere in the middle of a play and often there is a second parabasis towards the end. The elements of a parabasis have been defined and named by scholars but it is probable that Aristophanes' own understanding was less formal. The selection of elements can vary from play to play and it varies considerably within plays between first and second parabasis. The early plays (The Acharnians to The Birds) are fairly uniform in their approach however and the following elements of a parabasis can be found within them. kommation: This is a brief prelude, comprising short lines and often including a valediction to the departing actors, such as (Go rejoicing!). parabasis proper: This is usually a defense of the author's work and it includes criticism of the audience's attitude. It is declaimed in long lines of 'anapestic tetrameters'. Aristophanes himself refers to the parabasis proper only as 'anapests'. pnigos: Sometimes known as 'a choker', it comprises a few short lines appended to the parabasis proper as a kind of rapid patter (it has been suggested that some of the effects achieved in a pnigos can be heard in "The Lord Chancellor's Nightmare Song", in act 2 of Gilbert and Sullivan's Iolanthe). epirrhematic syzygies: These are symmetrical scenes that mirror each other in meter and number of lines. They form part of the first parabasis and they often comprise the entire second parabasis. They are characterized by the following elements: strophe or ode: These are lyrics in a variety of meters, sung by the Chorus in the first parabasis as an invocation to the gods and as a comic interlude in the second parabasis. epirrhema: These are usually long lines of trochaic tetrameters. Broadly political in their significance, they were probably spoken by the leader of the Chorus in character. antistrophe or antode: These are songs that mirror the strophe/ode in meter, length and function. antepirrhema. This is another declaimed passage and it mirrors the epirrhema in meter, length and function. The Wasps is thought to offer the best example of a conventional approach and the elements of a parabasis can be identified and located in that play as follows. {\| class="wikitable" style="margin: 1em auto 1em auto; background-color: #ffffff" ! Elements in The Wasps ! 1st parabasis ! 2nd parabasis \|- \| kommation \| lines 1009–1014 \| --- \|- \| parabasis proper \| lines 1015–1050 \| --- \|- \| pnigos \| lines 1051–1059 \| --- \|- \| strophe \| lines 1060–1070 \| lines 1265–1274 \|- \| epirrhema \| lines 1071–1090 \| lines 1275–1283 \|- \| antistrophe \| lines 1091–1101 \| missing \|- \| antepirrhema \| lines 1102–1121 \| lines 1284–1291 \|} Textual corruption is probably the reason for the absence of the antistrophe in the second parabasis. However, there are several variations from the ideal even within the early plays. For example, the parabasis proper in The Clouds (lines 518–562) is composed in eupolidean meter rather than in anapests and the second parabasis includes a kommation but it lacks strophe, antistrophe and antepirrhema (The Clouds lines 1113–1130). The second parabasis in The Acharnians lines 971–999 can be considered a hybrid parabasis/song (i.e. the declaimed sections are merely continuations of the strophe and antistrophe) and, unlike the typical parabasis, it seems to comment on actions that occur on stage during the address. An understanding of Old Comedy conventions such as the parabasis is necessary for a proper understanding of Aristophanes' plays; on the other hand, a sensitive appreciation of the plays is necessary for a proper understanding of the conventions. Influence and legacy The tragic dramatists, Sophocles and Euripides, died near the end of the Peloponnesian War and the art of tragedy thereafter ceased to develop, yet comedy did continue to evolve after the defeat of Athens and it is possible that it did so because, in Aristophanes, it had a master craftsman who lived long enough to help usher it into a new age. Indeed, according to one ancient source (Platonius, c.9th Century AD), one of Aristophanes's last plays, Aioliskon, had neither a parabasis nor any choral lyrics (making it a type of Middle Comedy), while Kolakos anticipated all the elements of New Comedy, including a rape and a recognition scene. Aristophanes seems to have had some appreciation of his formative role in the development of comedy, as indicated by his comment in Clouds that his audience would be judged by other times according to its reception of his plays. Clouds was awarded third (i.e. last) place after its original performance and the text that has come down to the modern age was a subsequent draft that Aristophanes intended to be read rather than acted. The circulation of his plays in manuscript extended their influence beyond the original audience, over whom in fact they seem to have had little or no practical influence: they did not affect the career of Cleon, they failed to persuade the Athenians to pursue an honourable peace with Sparta and it is not clear that they were instrumental in the trial and execution of Socrates, whose death probably resulted from public animosity towards the philosopher's disgraced associates (such as Alcibiades), exacerbated of course by his own intransigence during the trial. The plays, in manuscript form, have been put to some surprising uses—as indicated earlier, they were used in the study of rhetoric on the recommendation of Quintilian and by students of the Attic dialect in the Fourth and Fifth Centuries AD. It is possible that Plato sent copies of the plays to Dionysius of Syracuse so that he might learn about Athenian life and government. Latin translations of the plays by Andreas Divus (Venice 1528) were circulated widely throughout Europe in the Renaissance and these were soon followed by translations and adaptations in modern languages. Racine, for example, drew Les Plaideurs (1668) from The Wasps. Goethe (who turned to Aristophanes for a warmer and more vivid form of comedy than he could derive from readings of Terence and Plautus) adapted a short play Die Vögel from The Birds for performance in Weimar. Aristophanes has appealed to both conservatives and radicals in the nineteenth and twentieth centuries—Anatoly Lunacharsky, first Commissar of Enlightenment for the USSR in 1917, declared that the ancient dramatist would have a permanent place in proletarian theatre and yet conservative, Prussian intellectuals interpreted Aristophanes as a satirical opponent of social reform. The avant-gardist stage-director Karolos Koun directed a version of The Birds under the Acropolis in 1959 that established a trend in modern Greek history of breaking taboos through the voice of Aristophanes. The plays have a significance that goes beyond their artistic function, as historical documents that open the window on life and politics in classical Athens, in which respect they are perhaps as important as the writings of Thucydides. The artistic influence of the plays is immeasurable. They have contributed to the history of European theatre and that history in turn shapes our understanding of the plays. Thus for example the operettas of Gilbert and Sullivan can give us insights into Aristophanes' plays and similarly the plays can give us insights into the operettas. The plays are a source of famous sayings, such as "By words the mind is winged." Listed below are some of the many works influenced (more or less) by Aristophanes. Drama 1909: Wasps, original Greek, Cambridge University undergraduate production, music by Vaughan Williams; 2004, July–October: The Frogs (musical), adapted by Nathan Lane, music and lyrics by Stephen Sondheim, performed at The Vivian Beaumont Theater Broadway; 1962–2006: various plays by students and staff, King's College London, in the original Greek: Frogs 1962, 1971, 1988; Thesmophoriazusae 1965, 1974, 1985; The Acharnians 1968, 1992, 2004; Clouds 1977, 1990; Birds 1982, 2000; Ecclesiazusae 2006; Peace 1970; Wasps 1981 2002: Lysistrata, adapted by Robert Brustein, music by Galt MacDermot, performed by American Repertory Theatre, Boston US; 2008, May–June: Frogs, adapted by David Greenspan, music by Thomas Cabaniss, performed by Classic Stage Company, New York, US. 2023, May: The Wasps, adapted by the NSW Arts Unit Drama Company, directed by Genevieve de Souza, NIDA Literature The romantic poet, Percy Shelley, wrote a comic, lyrical drama (Swellfoot the Tyrant) in imitation of Aristophanes' play The Frogs after he was reminded of the Chorus in that play by a herd of pigs passing to market under the window of his lodgings in San Giuliano, Italy. Aristophanes (particularly in reference to The Clouds) is mentioned frequently by the character Menedemos in the Hellenic Traders series of novels by H. N. Turteltaub. A liberal version of the comedies have been published in comic book format, initially by "Agrotikes Ekdoseis" during the 1980s and republished over the years by other companies. The plot was written by Tasos Apostolidis and the sketches were of George Akokalidis. The stories feature either Aristophanes narrating them, directing the play, or even as a character inside one of his stories. Radio shows Acropolis Now is a comedy radio show for the BBC set in Ancient Greece. It features Aristophanes, Socrates and many other famous Greeks. (Not to be confused with the Australian sitcom of the same name.) Aristophanes is characterised as a celebrity playwright, and most of his plays have the title formula: One of Our [e.g] Slaves has an Enormous Knob (a reference to the exaggerated appendages worn by Greek comic actors) Aristophanes Against the World was a radio play by Martyn Wade and broadcast on BBC Radio 4. Loosely based on several of his plays, it featured Clive Merrison as Aristophanes. The Wasps, radio play adapted by David Pountney, music by Vaughan Williams, recorded 26–28 July 2005, Albert Halls, Bolten, in association with BBC, under Halle label Music Satiric Dances for a Comedy by Aristophanes is a three-movement piece for concert band composed by Norman Dello Joio. It was commissioned in commemoration of the Bicentennial of 19 April 1775 (the start of the American Revolutionary War) by the Concord (Massachusetts) Band. The commission was funded by the Town of Concord and assistance was given by the Eastern National Park and Monument Association in cooperation with the National Park Service. Ralph Vaughan Williams wrote The Wasps for a 1909 Cambridge University production of the play. Translation of Aristophanes Alan H. Sommerstein believes that although there are good translations of Aristophanes' comedies, none could be flawless, "for there is much truth in the paradox that the only really perfect translation is the original." Nevertheless, there are competent, respectable translations in many languages. Despite the fact that translations of Aristophanes may not be perfect, "the reception of Aristophanes has gained extraordinary momentum as a topic of academic interest in the last few years." Works Surviving plays Most of these are traditionally referred to by abbreviations of their Latin titles; Latin remains a customary language of scholarship in classical studies. The Acharnians ( Akharneis; Attic ; ), 425 BC The Knights ( Hippeis; Attic ; Latin: ), 424 BC The Clouds ( Nephelai; Latin: ), original 423 BC, uncompleted revised version from 419 to 416 BC survives The Wasps ( Sphekes; Latin: ), 422 BC Peace ( Eirene; Latin: ), first version, 421 BC The Birds ( Ornithes; Latin: ), 414 BC Lysistrata ( Lysistrate), 411 BC Thesmophoriazusae or The Women Celebrating the Thesmophoria ( Thesmophoriazousai), first version The Frogs ( Batrakhoi; Latin: ), 405 BC Ecclesiazusae or The Assemblywomen; ( Ekklesiazousai), Wealth ( Ploutos; Latin Plutus) second version, 388 BC Datable non-surviving (lost) plays The standard modern edition of the fragments is Rudolf Kassel and Colin François Lloyd Austin's, Poetae Comici Graeci III.2. Banqueters (Δαιταλεῖς Daitaleis, 427 BC) Babylonians (Βαβυλώνιοι Babylonioi, 426 BC) Farmers (Γεωργοί Georgoi, 424 BC) Merchant Ships (Ὁλκάδες Holkades, 423 BC) Clouds (first version, 423 BC) Proagon (Προάγων, 422 BC) Amphiaraus (Ἀμφιάραος, 414 BC) Plutus (Wealth, first version, 408 BC) Gerytades (Γηρυτάδης, uncertain, probably 407 BC) Cocalus (Κώκαλος, 387 BC) Aiolosicon (Αἰολοσίκων, second version, 386 BC) Undated non-surviving (lost) plays Aiolosicon (first version) Anagyrus (Ἀνάγυρος) Frying-Pan Men (Ταγηνισταί Tagenistai) Daedalus (Δαίδαλος) Danaids (Δαναΐδες Danaides) Centaur (Κένταυρος Kentauros) Heroes (Ἥρωες) Lemnian Women (Λήμνιαι Lemniai) Old Age (Γῆρας Geras) Peace (second version) Phoenician Women (Φοίνισσαι Phoinissai) Polyidus (Πολύιδος) Seasons (Ὧραι Horai) Storks (Πελαργοί Pelargoi) Telmessians (Τελμησσεῖς Telmesseis) Triphales (Τριφάλης) Thesmophoriazusae (Women at the Thesmophoria Festival, second version) Women in Tents (Σκηνὰς Καταλαμβάνουσαι Skenas Katalambanousai) Attributed (doubtful, possibly by Archippus) See also Agathon Ancient Greek comedy Asteroid 2934 Aristophanes, named after the dramatist Greek literature Onomasti komodein, the witty personal attack made with total freedom against the most notable individuals Hubert Parry wrote music for The Birds Theatre of ancient Greece Codex Ravennas 429 Notes References reviewed by W. J. Slater, Phoenix, Vol. 30, No. 3 (Autumn, 1976), pp. 291–293 Lee, Jae Num. "Scatology in Continental Satirical Writings from Aristophanes to Rabelais" and "English Scatological Writings from Skelton to Pope." Swift and Scatological Satire. Albuquerque: U of New Mexico P, 1971. 7–22; 23–53. Aristophanes and the Comic Hero by Cedric H. Whitman Author(s) of Review: H. Lloyd Stow The American Journal of Philology, Vol. 87, No. 1 (Jan., 1966), pp. 111–113 G. M. Sifakis The Structure of Aristophanic Comedy The Journal of Hellenic Studies, Vol. 112, 1992 (1992), pp. 123–142 Van Steen, Gonda. 2000 Venom in Verse: Aristophanes in Modern Greece. Princeton University Press. Jstor.org, The American Journal of Philology, 1996. Life, death and Aristophanes' concept of Eros in Saul Bellow's "Ravelstein". Further reading The Eleven Comedies (in translation) at the University of Adelaide Library External links 440s BC births Year of birth unknown 380s BC deaths Year of death unknown 4th-century BC Athenians 4th-century BC writers 5th-century BC Athenians 5th-century BC writers Ancient Athenians Ancient Athenian dramatists and playwrights Ancient Greek satirists Old Comic poets Writers of lost works	5
An abscess is a collection of pus that has built up within the tissue of the body. Signs and symptoms of abscesses include redness, pain, warmth, and swelling. The swelling may feel fluid-filled when pressed. The area of redness often extends beyond the swelling. Carbuncles and boils are types of abscess that often involve hair follicles, with carbuncles being larger. They are usually caused by a bacterial infection. Often many different types of bacteria are involved in a single infection. In many areas of the world, the most common bacteria present is methicillin-resistant Staphylococcus aureus. Rarely, parasites can cause abscesses; this is more common in the developing world. Diagnosis of a skin abscess is usually made based on what it looks like and is confirmed by cutting it open. Ultrasound imaging may be useful in cases in which the diagnosis is not clear. In abscesses around the anus, computer tomography (CT) may be important to look for deeper infection. Standard treatment for most skin or soft tissue abscesses is cutting it open and drainage. There appears to be some benefit from also using antibiotics. A small amount of evidence supports not packing the cavity that remains with gauze after drainage. Closing this cavity right after draining it rather than leaving it open may speed healing without increasing the risk of the abscess returning. Sucking out the pus with a needle is often not sufficient. Skin abscesses are common and have become more common in recent years. Risk factors include intravenous drug use, with rates reported as high as 65% among users. In 2005, 3.2 million people went to American emergency departments for abscesses. In Australia, around 13,000 people were hospitalized in 2008 with the condition. Signs and symptoms Abscesses may occur in any kind of tissue but most frequently within the skin surface (where they may be superficial pustules known as boils or deep skin abscesses), in the lungs, brain, teeth, kidneys, and tonsils. Major complications may include spreading of the abscess material to adjacent or remote tissues, and extensive regional tissue death (gangrene). The main symptoms and signs of a skin abscess are redness, heat, swelling, pain, and loss of function. There may also be high temperature (fever) and chills. If superficial, abscesses may be fluctuant when palpated; this wave-like motion is caused by movement of the pus inside the abscess. An internal abscess is more difficult to identify, but signs include pain in the affected area, a high temperature, and generally feeling unwell. Internal abscesses rarely heal themselves, so prompt medical attention is indicated if such an abscess is suspected. An abscess can potentially be fatal depending on where it is located. Causes Risk factors for abscess formation include intravenous drug use. Another possible risk factor is a prior history of disc herniation or other spinal abnormality, though this has not been proven. Abscesses are caused by bacterial infection, parasites, or foreign substances. Bacterial infection is the most common cause, particularly Staphylococcus aureus. The more invasive methicillin-resistant Staphylococcus aureus (MRSA) may also be a source of infection, though is much rarer. Among spinal subdural abscesses, methicillin-sensitive Staphylococcus aureus is the most common organism involved. Rarely parasites can cause abscesses and this is more common in the developing world. Specific parasites known to do this include dracunculiasis and myiasis. Perianal abscess Surgery of the anal fistula to drain an abscess treats the fistula and reduces likelihood of its recurrence and the need for repeated surgery. There is no evidence that fecal incontinence is a consequence of this surgery for abscess drainage. Perianal abscesses can be seen in people with, for example, inflammatory bowel disease (such as Crohn's disease) or diabetes. Often the abscess will start as an internal wound caused by ulceration, hard stool, or penetrative objects with insufficient lubrication. This wound typically becomes infected as a result of the normal presence of feces in the rectal area, and then develops into an abscess. This often presents itself as a lump of tissue near the anus which grows larger and more painful with time. Like other abscesses, perianal abscesses may require prompt medical treatment, such as an incision and debridement or lancing. Incisional abscess An incisional abscess is one that develops as a complication secondary to a surgical incision. It presents as redness and warmth at the margins of the incision with purulent drainage from it. If the diagnosis is uncertain, the wound should be aspirated with a needle, with aspiration of pus confirming the diagnosis and availing for Gram stain and bacterial culture. Pathophysiology An abscess is a defensive reaction of the tissue to prevent the spread of infectious materials to other parts of the body. Organisms or foreign materials destroy the local cells, which results in the release of cytokines. The cytokines trigger an inflammatory response, which draws large numbers of white blood cells to the area and increases the regional blood flow. The final structure of the abscess is an abscess wall, or capsule, that is formed by the adjacent healthy cells in an attempt to keep the pus from infecting neighboring structures. However, such encapsulation tends to prevent immune cells from attacking bacteria in the pus, or from reaching the causative organism or foreign object. Diagnosis An abscess is a localized collection of pus (purulent inflammatory tissue) caused by suppuration buried in a tissue, an organ, or a confined space, lined by the pyogenic membrane. Ultrasound imaging can help in a diagnosis. Classification Abscesses may be classified as either skin abscesses or internal abscesses. Skin abscesses are common; internal abscesses tend to be harder to diagnose, and more serious. Skin abscesses are also called cutaneous or subcutaneous abscesses. IV drug use For those with a history of intravenous drug use, an X-ray is recommended before treatment to verify that no needle fragments are present. If there is also a fever present in this population, infectious endocarditis should be considered. Differential Abscesses should be differentiated from empyemas, which are accumulations of pus in a preexisting, rather than a newly formed, anatomical cavity. Other conditions that can cause similar symptoms include: cellulitis, a sebaceous cyst, and necrotising fasciitis. Cellulitis typically also has an erythematous reaction, but does not confer any purulent drainage. Treatment The standard treatment for an uncomplicated skin or soft tissue abscess is the act of opening and draining. There does not appear to be any benefit from also using antibiotics in most cases. A small amount of evidence did not find a benefit from packing the abscess with gauze. Incision and drainage The abscess should be inspected to identify if foreign objects are a cause, which may require their removal. If foreign objects are not the cause, incising and draining the abscess is standard treatment. In critical areas where surgery presents a high risk, it may be delayed or used as a last resort. The drainage of a lung abscess may be performed by positioning the affected individual in a way that enables the contents to be discharged via the respiratory tract. Warm compresses and elevation of the limb may be beneficial for a skin abscess. Antibiotics Most people who have an uncomplicated skin abscess should not use antibiotics. Antibiotics in addition to standard incision and drainage is recommended in persons with severe abscesses, many sites of infection, rapid disease progression, the presence of cellulitis, symptoms indicating bacterial illness throughout the body, or a health condition causing immunosuppression. People who are very young or very old may also need antibiotics. If the abscess does not heal only with incision and drainage, or if the abscess is in a place that is difficult to drain such as the face, hands, or genitals, then antibiotics may be indicated. In those cases of abscess which do require antibiotic treatment, Staphylococcus aureus bacteria is a common cause and an anti-staphylococcus antibiotic such as flucloxacillin or dicloxacillin is used. The Infectious Diseases Society of America advises that the draining of an abscess is not enough to address community-acquired methicillin-resistant Staphylococcus aureus (MRSA), and in those cases, traditional antibiotics may be ineffective. Alternative antibiotics effective against community-acquired MRSA often include clindamycin, doxycycline, minocycline, and trimethoprim-sulfamethoxazole. The American College of Emergency Physicians advises that typical cases of abscess from MRSA get no benefit from having antibiotic treatment in addition to the standard treatment. If the condition is thought to be cellulitis rather than an abscess, consideration should be given to the possibility of the strep species as a cause, that are still sensitive to traditional anti-staphylococcus agents such as dicloxacillin or cephalexin. This would be in the case of people that are able to tolerate penicillin. Antibiotic therapy alone without surgical drainage of the abscess is seldom effective due to antibiotics often being unable to get into the abscess and their ineffectiveness at low pH levels. Culturing the wound is not needed if standard follow-up care can be provided after the incision and drainage. Performing a wound culture is unnecessary because it rarely gives information which can be used to guide treatment. Packing In North America, after drainage, an abscess cavity is usually packed, often with special iodoform-treated cloth. This is done to absorb and neutralize any remaining exudate as well as to promote draining and prevent premature closure. Prolonged draining is thought to promote healing. The hypothesis is that though the heart's pumping action can deliver immune and regenerative cells to the edge of an injury, an abscess is by definition a void in which no blood vessels are present. Packing is thought to provide a wicking action that continuously draws beneficial factors and cells from the body into the void that must be healed. Discharge is then absorbed by cutaneous bandages and further wicking promoted by changing these bandages regularly. However, evidence from emergency medicine literature reports that packing wounds after draining, especially smaller wounds, causes pain to the person and does not decrease the rate of recurrence, nor bring faster healing, or fewer physician visits. Loop drainage More recently, several North American hospitals have opted for less-invasive loop drainage over standard drainage and wound packing. In one study of 143 pediatric outcomes, a failure rate of 1.4% was reported in the loop group versus 10.5% in the packing group (P<.030), while a separate study reported a 5.5% failure rate among the loop group. Primary closure Closing an abscess immediately after draining it appears to speed healing without increasing the risk of recurrence. This may not apply to anorectal abscesses as while they may heal faster, there may be a higher rate of recurrence than those left open. Prognosis Even without treatment, skin abscesses rarely result in death, as they will naturally break through the skin. Other types of abscess are more dangerous. Brain abscesses may be fatal if untreated. When treated, the mortality rate reduces to 5–10%, but is higher if the abscess ruptures. Epidemiology Skin abscesses are common and have become more common in recent years. Risk factors include intravenous drug use, with rates reported as high as 65% among users. In 2005, in the United States 3.2 million people went to the emergency department for an abscess. In Australia around 13,000 people were hospitalized in 2008 for the disease. Society and culture The Latin medical aphorism "ubi pus, ibi evacua" expresses "where there is pus, there evacuate it" and is classical advice in the culture of Western medicine. Needle exchange programmes often administer or provide referrals for abscess treatment to injection drug users as part of a harm reduction public health strategy. Etymology An abscess is so called "abscess" because there is an abscessus (a going away or departure) of portions of the animal tissue from each other to make room for the suppurated matter lodged between them. The word carbuncle is believed to have originated from the Latin: carbunculus, originally a small coal; diminutive of carbon-, carbo: charcoal or ember, but also a carbuncle stone, "precious stones of a red or fiery colour", usually garnets. Other types The following types of abscess are listed in the medical dictionary: References External links General surgery Cutaneous lesion Wikipedia medicine articles ready to translate Wikipedia emergency medicine articles ready to translate	5
Aarhus (, , ; officially spelled Århus from 1948 until 1 January 2011) is the second-largest city in Denmark and the seat of Aarhus Municipality. It is located on the eastern shore of Jutland in the Kattegat sea and approximately northwest of Copenhagen. Dating back to the late 8th century, Aarhus was founded as a harbour settlement at the mouth of the Aarhus River and quickly became a trade hub. The first Christian church was built here around the year 900 and later in the Viking Age the town was fortified with defensive ramparts. The bishopric of Aarhus grew steadily stronger and more prosperous, building several religious institutions in the town during the early Middle Ages. Trade continued to improve, although it was not until 1441 that Aarhus was granted market town privileges, and the population of Aarhus remained relatively stable until the 19th century. The city began to grow significantly as trade prospered in the mid-18th century, but not until the mid-19th century did the Industrial Revolution bring real growth in population. The first railway line in Jutland was built here in 1862. In 1928, the first university in Jutland was founded in Aarhus and today it is a university city and the largest centre for trade, services, industry, and tourism in Jutland. Aarhus Cathedral is the longest cathedral in Denmark with a total length of . The Church of our Lady (Vor Frue Kirke) was originally built in 1060, making it the oldest stone church in Scandinavia. The City Hall, designed by Arne Jacobsen and Erik Møller, was completed in 1941 in a modern Functionalist style. Aarhus Theatre, the largest provincial theatre in Denmark, opposite the cathedral on Bispetorvet, was built by Hack Kampmann in the Art Nouveau style and completed in 1916. Musikhuset Aarhus (concert hall) and Det Jyske Musikkonservatorium (Royal Academy of Music, Aarhus/Aalborg) are also of note, as are its museums including the open-air museum Den Gamle By, the art museum ARoS Aarhus Kunstmuseum, the Moesgård Museum and the women's museum Kvindemuseet. The city's major cultural institutions include Den Gamle By, ARoS Aarhus Kunstmuseum, the Moesgård Museum, Gender Museum Denmark, Musikhuset Aarhus and Aarhus Theatre. Known as (lit. City of Smiles) it is the Danish city with the youngest demographics and home to Scandinavia's largest university, Aarhus University. Commercially, the city is the principal container port in the country, and major Danish companies such as Vestas, Arla Foods, Salling Group, and Jysk have their headquarters there. Etymology The name originates from the city's location at the mouth of (Aarhus River). It is a compound of the two words , genitive of ("river", Modern Danish ), and ("mouth", in Modern Icelandic this word, spelt , is still used for "river delta"). In Valdemar's Census Book (1231) the city was called Arus, and in Icelandic it was known as , later written as Aars. Spelling The spelling "Aarhus" is first found in 1406 and gradually became the norm in the 17th century. With the Danish spelling reform of 1948, "Aa" was changed to "Å". Some Danish cities resisted the change but Aarhus city council opted to change the name. In 2010, the city council voted to change the name back from to again with effect from 1 January 2011. It is still grammatically correct to write geographical names with the letter Å and local councils are allowed to use the Aa spelling as an alternative and most newspapers and public institutions will accept either. Some official authorities such as the Danish Language Committee, publisher of the Danish Orthographic Dictionary, still retain as the main name, providing as a second option, in brackets and some institutions are still using explicitly in their official name, such as the local newspaper and the schools and . "Aa" was used by some major institutions between 1948 and 2011 as well, such as Aarhus University or the largest local sports club, (AGF), which has never used the "Å"-spelling. Certain geographically affiliated names have been updated to reflect the name of the city, such as the Aarhus River, changed from to . History Early history Founded in the early Viking Age, Aarhus is one of the oldest cities in Denmark, along with Ribe and Hedeby. The original Aros settlement was situated on the northern shores of a fjord by the mouth of the Aarhus River, right where the city center is today. It quickly became a hub for sea-going trade due to its position on intersecting trade routes in the Danish straits and the fertile countryside. The trade, however, was not nearly as prominent as that in Ribe and Hedeby during the Viking Age, and it was primarily linked to Norway as evidenced by archaeological finds. A shipbuilding yard from the Viking Age was uncovered upriver in 2002 by archaeologists. It was located at a place formerly known as Snekkeeng, or Snekke Meadow in English ('Snekke' is a type of longship), east of the Brabrand Lake close to Viby, and it was in use for more than 400 years from the late 700s till around the mid-1200s. Archaeological evidence indicates that Aarhus was a town as early as the last quarter of the 8th century. Discoveries after a 2003 archaeological dig included half-buried longhouses, firepits, glass pearls and a road dated to the late 700s. Several excavations in the inner city since the 1960s have revealed wells, streets, homes and workshops, and inside the buildings and adjoining archaeological layers, everyday utensils like combs, jewellery and basic multi-purpose tools from approximately the year 900 have been unearthed. The early town was fortified with defensive earthen ramparts in the first part of the 900s, possibly in the year 934 on order from king Gorm the Old. The fortifications were later improved and expanded by his son Harald Bluetooth, encircling the settlement much like the defence structures found at Viking ring fortresses elsewhere. Together with the town's geographical placement, this suggests that Aros became an important military centre in the Viking Age. There are also strong indications of a former royal residence from the same period in Viby, a few kilometres south of the Aarhus city centre. The centre of Aarhus was originally a pagan burial site until Aarhus's first Christian church, Holy Trinity Church, a timber structure, was built upon it during the reign of Frode, King of Jutland, around 900. The bishopric of Aarhus dates back to at least 948 when Adam of Bremen reported that the missionary bishop Reginbrand of Aros attended the synod of Ingelheim in Germany, but the late Viking Age during the Christianization of Scandinavia was a turbulent and violent time with several naval attacks on the town, such as Harald Hardrada's assault around 1050, when the Holy Trinity Church was burned to the ground. Despite the conflicts, Aarhus continued to prosper from the trade and the finding of six runestones in and around Aarhus indicates the city had some significance around the year 1000, as only wealthy nobles traditionally used them. The bishopric diocese was obliterated for almost a hundred years after Reginbrand in 988, but in 1060 a new bishop Christian was ordained and he founded a new church in Aarhus, Sankt Nicolai Domkirke (St. Nicholas Cathedral), this time in stone. It was erected outside the town fortifications, and stood finished in 1070 at the site where Church of Our Lady stands today, but only an underground crypt remains. Middle Ages The growing influence of the Church during the Middle Ages gradually turned Aarhus, with its bishopric, into a prosperous religious centre. Many public and religious buildings were built in and around the town; notably Aarhus Cathedral was initiated in the late 12th century by the influential bishop Peder Vognsen, and around 1200, Aros had a total of four churches. The 13th century also marks a thorough reorganisation, erasing most of the town's original layout with new streets, relocations, dismantling and new constructions. The Church clearly had the upper hand in the Aarhus region during medieval times, and the large bishopric of Aarhus prospered and expanded territory, reaching as far as Viborg in extent. In 1441, Christopher III issued the oldest known charter granting market town status, although similar privileges may have existed as far back as the 12th century. The charter is the first official recognition of the town as a regional power and is by some considered Aarhus's birth certificate. The commercial and religious status spurred town growth, and in 1477 the defensive earthen ramparts, which had ringed the town since the Viking Age, were abandoned to accommodate expansion. Parts of the ramparts still exist today and can be experienced as steep slopes at the riverside, and they have also survived in some place names of the inner city, including the streets of Volden (The Rampart) and Graven (The Moat). Aarhus grew to become one of the largest cities in the country by the early 16th century. In 1657, octroi was imposed in larger Danish cities which changed the layout and face of Aarhus over the following decades. Wooden city walls were erected to prevent smuggling, with gates and toll booths on the major thoroughfares, Mejlgade and Studsgade. The city gates funnelled most traffic through a few streets where merchant quarters were built. In the 17th century, Aarhus entered a period of recession as it suffered blockades and bombardments during the Swedish wars and trade was dampened by the preferential treatment of the capital by the state. Not until the middle of the 18th century did growth return, in large part due to trade with the large agricultural catchment areas around the city; grain, particularly, proved to be a remunerative export. The first factories were established at this time, as the Industrial Revolution reached the country, and in 1810 the harbour was expanded to accommodate growing trade. Industrialisation Aarhus began to prosper in the 1830s as the industrial revolution reached the city and factories with steam-driven machinery became more productive. In 1838, the electoral laws were reformed leading to elections for the 15 seats on the city council. The rules were initially very strict, allowing only the wealthiest citizens to run. In the 1844 elections, only 174 citizens qualified out of a total population of more than 7,000. The first city council, mainly composed of wealthy merchants and industrialists, quickly looked to improve the harbour, situated along the Aarhus River. Larger ships and growing freight volumes made a river harbour increasingly impractical. In 1840, the harbour was moved to the coast, north of the river, where it became the largest industrial harbour outside Copenhagen over the following 15 years. From the outset, the new harbour was controlled by the city council, as it is to this day. During the First Schleswig War, Aarhus was occupied by German troops from 21 June to 24 July 1849. The city was spared any fighting, but in Vejlby north of the city a cavalry skirmish known as Rytterfægtningen took place which stopped the German advance through Jutland. The war and occupation left a notable impact on the city as many streets, particularly on Frederiksbjerg, are named after Danish officers of the time. Fifteen years later, in 1864, the city was occupied again, this time for seven months, during the Second Schleswig War. In spite of wars and occupation, the city continued to expand and develop. In 1851, the octroi was abolished and the city walls were removed to provide easier access for trade. Regular steamship links with Copenhagen had begun with the Jylland in 1825–26 and the Dania (1827–36), and in 1862 Jutland's first railway was established between Aarhus and Randers. In the second half of the 19th century, industrialisation came into full effect and a number of new industries emerged around production and refinement of agricultural products, especially oil and butter. Many companies from this time would come to leave permanent iconic marks on Aarhus. The Ceres Brewery was established in 1856 and served as Aarhus's local brewery for more than 150 years, gradually expanding into an industrial district known as Ceres-grunden (lit.: the Ceres-ground). In 1896, local farmers and businessmen created Korn- og Foderstof Kompagniet (KFK), focused on grain and feedstuffs. KFK established departments all over the country, while its headquarters remained in Aarhus where its large grain silos still stand today. Otto Mønsted created the Danish Preserved Butter Company in 1874, focusing on butter export to England, China and Africa and later founded the Aarhus Butterine Company in 1883, the first Danish margarine factory. His company became an important local employer, with factory employees increasing from 100 in 1896 to 1,000 in 1931, partaking in the effective transformation of the city from a regional trade hub to an industrial centre. Other new factories of note included the dockyard Aarhus Flydedok and the oil mill Århus Oliefabrik. Aarhus became the largest provincial city in the country by the turn of the century and the city marketed itself as the "Capital of Jutland". The population increased from 15,000 in 1870 to 52,000 in 1901 and, in response, the city annexed large land areas to develop new residential quarters such as Trøjborg, Frederiksbjerg and Marselisborg. Many of its cultural institutions were also established at this time such as Aarhus Theatre (1900), the original State Library (1902), Aarhus University (1928) and several hospitals. Second World War On 9 April 1940, Nazi Germany invaded Denmark, occupying Aarhus the following day; the occuption lasted for five years. This was a destructive period with major disasters, loss of life and economic depression. The Port of Aarhus became a hub for supplies to the Baltics and Norway, while the surrounding rail network supplied the Atlantic Wall in west Jutland and cargo headed for Germany. Combined, these factors resulted in a strong German presence, especially in 1944–45. Small resistance groups first appeared in 1941–42 but the first to co-ordinate with the Freedom Council was the Samsing Group, responsible for most operations from early 1943. The Samsing group, along with others in and around Aarhus, was dismantled in June 1944 when Grethe "Thora" Bartram turned her family and acquaintances over to German authorities. In response, requests for assistance were sent to contacts in England and in October 1944 the Royal Air Force bombed the Gestapo headquarters successfully destroying archives and obstructing the ongoing investigation. In the summer of 1944 the Copenhagen-based resistance group Holger Danske helped establish the 5 Kolonne group and an SOE agent arrived from England to liaison with the L-groups. Subsequently, resistance operations escalated which was countered with Schalburgtage terror operations by the Peter group. The increasingly destructive occupation was compounded when an ammunition barge exploded in July 1944, destroying much of the harbour area. On 5 May 1945 German forces in Denmark surrendered but during the transitional period fighting broke out resulting in 22 dead. On 8 May the British Royal Dragoons entered the city. Post-World War II years In the 1970s and 1980s the city entered a period of rapid economic growth and the service sector overtook trade, industry and crafts as the leading sector of employment for the first time. Workers gradually began commuting to the city from most of east and central Jutland as the region became more interconnected. The student population tripled between 1965 and 1977 turning the city into a Danish centre of research and education. The growing and comparably young population initiated a period of creativity and optimism; Gaffa and the KaosPilot school were founded in 1983 and 1991 respectively, and Aarhus was at the centre of a renaissance in Danish rock and pop music launching bands and musicians such as TV2, Gnags, Thomas Helmig, Bamses Venner, Anne Dorte Michelsen, Mek Pek and Shit & Chanel. The 2000s Since the turn of the millennium, Aarhus has seen an unprecedented building boom with many new institutions, infrastructure projects, city districts and recreational areas. Several of the construction projects are among the largest in Europe, such as the New University Hospital (DNU) and the harbourfront redevelopment. Both the skyline and land use of the inner city is changing, as former industrial sites are being redeveloped into new city districts and neighbourhoods. Starting in 2008, the former docklands known as De Bynære Havnearealer (The Peri-urban Harbour-areas), and closest to the city seaside, are being converted to new mixed-use districts. It is among the largest harbourfront projects in Europe. The northern part dubbed Aarhus Ø (Aarhus Docklands) is almost finished as of 2018, while the southern district dubbed Sydhavnskvarteret (The South-harbour neighbourhood) is only starting to be developed. The adjacent site of Frederiks Plads at the former DSB repair facilities have been under construction since 2014 as a new business and residential quarter. The main bus terminal close by is planned to be moved to the central railway station and the site will be redeveloped to a new residential neighbourhood. Elsewhere in the inner city, the site of the former Ceres breweries was redeveloped in 2012-2019 as a new mixed use neighbourhood known as CeresByen. Construction of Aarhus Letbane, the first light rail system in the country, commenced in 2013, and the first increment was finished in December 2017. Since then, the lightrail service has been expanded with two intercity sections to the towns of Odder and Grenå, respectively, and also includes a northward leg to the suburb of Lisbjerg. The light rail system is planned to tie many other suburbs closer to central Aarhus in the future, with the next phase including local lines to Brabrand in the east and Hinnerup to the north. Accelerating growth since the early 2000s, brought the inner urban area to roughly 260,000 inhabitants by 2014. The rapid growth is expected to continue until at least 2030 when Aarhus municipality has set an ambitious target for 375,000 inhabitants. Geography Aarhus is located at the Bay of Aarhus facing the Kattegat sea in the east with the peninsulas of Mols and Helgenæs across the bay to the northeast. Mols and Helgenæs are both part of the larger regional peninsula of Djursland. A number of larger cities and towns is within easy reach from Aarhus by road and rail, including Randers ( by road north), Grenå (northeast), Horsens ( south) and Silkeborg ( east). Topography At Aarhus's location, the Bay of Aarhus provides a natural harbour with a depth of quite close to the shore. Aarhus was founded at the mouth of a brackish water fjord, but the original fjord no longer exists, as it has gradually narrowed into what is now the Aarhus River and the Brabrand Lake, due to natural sedimentation. The land around Aarhus was once covered by forests, remains of which exist in parts of Marselisborg Forest to the south and Riis Skov to the north. Several lakes extend west from the inner city as the landscape merges with the larger region of Søhøjlandet with heights exceeding at Himmelbjerget between Skanderborg and Silkeborg. The highest natural point in Aarhus Municipality is Jelshøj at 128 metres above sea level, in the southern district of Højbjerg. The hilltop is home to a Bronze Age barrow shrouded in local myths and legends. The hilly area around Aarhus consists of a morainal plateau from the last ice age, broken by a complex system of tunnel valleys. The most prominent valleys of this network are the Aarhus Valley in the south, stretching inland east–west with the Aarhus River, Brabrand Lake, Årslev Lake and Tåstrup Lake, and the Egå Valley to the north, with the stream of Egåen, Egå Engsø, the bog of Geding-Kasted Mose and Geding Lake. Most parts of the two valleys have been drained and subsequently farmed, but in the early 2000s some of the drainage was removed and parts of the wetlands were restored for environmental reasons. The valley system also includes the stream of Lyngbygård Å in the west and valleys to the south of the city, following erosion channels from the pre-quaternary. By contrast, the Aarhus River Valley and the Giber River Valley are late glacial meltwater valleys. The coastal cliffs along the Bay of Aarhus consist of shallow tertiary clay from the Eocene and Oligocene (57 to 24 million years ago). Climate Aarhus has a temperate oceanic climate (Köppen: Cfb) and the weather is constantly influenced by major weather systems from all four ordinal directions, resulting in unstable conditions throughout the year. Temperature varies a great deal across the seasons with a mild spring in April and May, warmer summer months from June to August, frequently rainy and windy autumn months in October and September and cooler winter months, often with frost and occasional snow, from December to March. The city centre experiences the same climatic effects as other larger cities with higher wind speeds, more fog, less precipitation and higher temperatures than the surrounding, open land. Western winds from the Atlantic and North Sea are dominant resulting in more precipitation in western Denmark. In addition, Jutland rises sufficiently in the centre to lift air to higher, colder altitudes contributing to increased precipitation in eastern Jutland. Combined, these factors make east and south Jutland comparatively wetter than other parts of the country. Average temperature over the year is with February being the coldest month () and August the warmest (). Temperatures in the sea can reach in June to August, but it is not uncommon for beaches to register locally. The geography in the area affects the local climate of the city with the Aarhus Bay imposing a temperate effect on the low-lying valley floor where central Aarhus is located. Brabrand Lake to the west further contributes to this effect and as a result, the valley has a comparably mild, temperate climate. The sandy ground on the valley floor dries up quickly after winter and warms faster in the summer than the surrounding hills of moist-retaining boulder clay. These conditions affect crops and plants that often bloom 1–2 weeks earlier in the valley than on the northern and southern hillsides. Because of the northern latitude, the number of daylight hours varies considerably between summer and winter. On the summer solstice, the sun rises at 04:26 and sets at 21:58, providing 17 hours 32 minutes of daylight. On the winter solstice, it rises at 08:37 and sets at 15:39 with 7 hours and 2 minutes of daylight. The difference in length of days and nights between summer and winter solstices is 10 hours and 30 minutes. Politics and administration Aarhus is the seat of Aarhus Municipality, and Aarhus City Council (Aarhus Byråd) is also the municipal government with headquarters in Aarhus City Hall. The Mayor of Aarhus since 2010 is Jacob Bundsgaard of the Social Democrats. Municipal elections are held every fourth year on the third Tuesday of November with the next election in 2021. The city council consists of 31 members elected for four-year terms. When an election has determined the composition of the council, it elects a mayor, two deputy mayors and five aldermen from their ranks. Anyone who is eligible to vote and who resides within the municipality can run for a seat on the city council provided they can secure endorsements and signatures from 50 inhabitants of the municipality. The first publicly elected mayor of Aarhus was appointed in 1919. In the 1970 Danish Municipal Reform the current Aarhus municipality was created by merging 20 municipalities. Aarhus was the seat of Aarhus County until the 2007 Danish municipal reform, which substituted the Danish counties with five regions and replaced Aarhus County with Central Denmark Region (Region Midtjylland), seated in Viborg. Subdivisions Aarhus Municipality has 45 electoral wards and polling stations in four electoral districts for the Folketing (national Parliament). The diocese of Aarhus has four deaneries composed of 60 parishes within Aarhus municipality. Aarhus municipality contains 21 postal districts and some parts of another 9. The urban area of Aarhus and the immediate suburbs are divided into the districts Aarhus C, Aarhus N, Aarhus V, Viby J, Højbjerg and Brabrand. Environmental planning Aarhus has increasingly been investing in environmental planning and, in accordance with national policy, aims to be -neutral and independent of fossil fuels for heating by 2030. The municipal power plants were adapted for this purpose in the 2010s. In 2015, the municipality took over three private straw-fired heating plants and the year after, a new 77 MW combined heat and power biomass plant at Lisbjerg Power Station was completed while Studstrup Power Station finished a refit to move from coal to wood chips. In conjunction with the development of the Docklands district there are plans for a utility-scale seawater heat pump which will take advantage of fluctuating electricity prices to supply the district heating system. Since 2015, the city has been implementing energy-saving LED technology in street lighting; by January 2019, about half of the municipal street lighting had been changed. Apart from reducing the city's CO2 emissions, it saves 30% on the electricity bill, thereby making it a self-financed project over a 20-year period. The municipality aims for a coherent and holistic administration of the water cycle to protect against, or clean up, previous pollution and encourage green growth and self-sufficiency. The main issues are excessive nutrients, adapting to increased (and increasing) levels of precipitation brought on by climate change, and securing the water supply. These goals have manifested in a number of large water treatment projects often in collaboration with private partners. In the 2000s, underground rainwater basins were built across the city while the two lakes Årslev Engsø and Egå Engsø were created in 2003 and 2006 respectively. The number of sewage treatment plants is planned to be reduced from 17 to 2 by 2025, as the treatment plants in Marselisborg and Egå are scheduled for expansion to take over all waste water treatment. They have already been refitted for biogas production to become net producers of electricity and heat. To aid the new treatment plants, and avoid floodings, sewage and stormwater throughout the municipality is planned to be separated into two different drainage systems. Construction began in 2017 in several areas, but it is a long process that is scheduled to be finished by 2085. Afforestation projects have been undertaken to prevent groundwater pollution, secure drinking water, sequester , increase biodiversity, create an attractive countryside, provide easy access to nature and offer outdoor activities to the public. In 2000, the first project, the New Forests of Aarhus, was completed, which aimed to double the forest cover in the municipality and, in 2009, another phase was announced to double forest cover once more before the year 2030. The afforestation plans were realised as a local project in collaboration with private landowners, under a larger national agenda. Other projects to expand natural habitats include a rewilding effort in Geding-Kasted Bog and continuous monitoring of the four Natura 2000 areas in the municipality. Demographics Aarhus has a population of 261,570 on for a density of 2,874/km2 (7,444/sq mi). Aarhus municipality has a population of 330,639 on 468 km2 with a density of 706/km2 (1,829/sq mi). Less than a fifth of the municipal population resides beyond city limits and almost all live in an urban area. The population of Aarhus is both younger and better-educated than the national average which can be attributed to the high concentration of educational institutions. More than 40% of the population have an academic degree while only some 14% have no secondary education or trade. The largest age group is 20- to 29-year-olds and the average age is 37.5, making it the youngest city in the country and one of its youngest municipalities. Women have slightly outnumbered men for many years. The city is home to 75 different religious groups and denominations, most of which are Christian or Muslim with a smaller number of Buddhist, Hindu, and Jewish communities. Since the 1990s there has been a marked growth in diverse new spiritual groups although the total number of followers remains small. The majority of the population are members of the Protestant state church, Church of Denmark, which is by far the largest religious institution both in the city and the country as a whole. Some 20% of the population are not officially affiliated with any religion, a percentage that has been slowly rising for many years. During the 1990s there was significant immigration from Turkey and in the 2000s, there was a fast growth in the overall immigrant community, from 27,783 people in 1999 to 40,431 in 2008. The majority of immigrants have roots outside Europe and the developed world, comprising some 25,000 people from 130 different nationalities, with the largest groups coming from the Middle East and North Africa. Some 15,000 have come from within Europe, with Poland, Germany, Romania and Norway being the largest contributors. Many immigrants have established themselves in the suburbs of Brabrand, Hasle and Viby, where the percentage of inhabitants with foreign origins has risen by 66% since 2000. This has resulted in a few so-called ghettos, defined as residential areas with more than half of inhabitants from non-Western countries and with relatively high levels of poverty and/or crime. Gellerup is the most notable neighbourhood in that respect. The ghetto-labelling has been criticized as unnecessarily stigmatising and counterproductive for social and economical development of the related areas. Economy The economy of Aarhus is predominantly knowledge- and service-based, strongly influenced by the University of Aarhus and the large healthcare industry. The service sector dominates the economy and is growing as the city transitions away from manufacturing. Trade and transportation remain important sectors, benefiting from the large port and central position on the rail network. Manufacturing has been in slow but steady decline since the 1960s while agriculture has long been a marginal sector within the municipality. The municipality is home to 175,000 jobs with some 100,000 in the private sector and the rest split between state, region and municipality. The region is a major agricultural producer, with many large farms in the outlying districts. People commute to Aarhus from as far away as Randers, Silkeborg and Skanderborg and almost a third of those employed within the Aarhus municipality commute from neighbouring communities. Aarhus is a centre for retail in the Nordic and Baltic countries, with expansive shopping centres, the busiest commercial street in the country and a dense urban core with many speciality shops. The job market is knowledge- and service-based, and the largest employment sectors are healthcare and social services, trade, education, consulting, research, industry and telecommunications. The municipality has more high- and middle-income jobs, and fewer low-income jobs, than the national average. Today, te majority of the largest companies in the municipality are in the sectors of trade, transport and media. The wind power industry has strong roots in Aarhus and the larger region of Central Jutland, and nationally, most of the revenue in the industry is generated by companies in the greater Aarhus area. The wind industry employs about a thousand people within the municipality, making it a central component in the local economy. The biotech industry is well-established in the city, with many small- and medium-sized companies mainly focused on research and development. There are multiple Big Tech companies with offices in the city, including Uber and Google. Several major companies are headquartered in Aarhus, including four of the ten largest in the country. These include Arla Foods, one of the largest dairy groups in Europe, Salling Group, Denmark's largest retailer, Jysk, a worldwide retailer of household goods, Vestas, a global wind turbine manufacturer, Terma A/S, a major defence and aerospace manufacturer, Per Aarsleff, a civil engineering company and several large retail companies. Other large employers of note include Krifa, Systematic A/S,), and Bestseller A/S. Since the early 2000s, the city has experienced an influx of larger companies moving from other parts of the Jutland peninsula. Port of Aarhus The Port of Aarhus is one of the largest industrial ports in northern Europe with the largest container terminal in Denmark, processing more than 50% of Denmark's container traffic and accommodating the largest container vessels in the world. It is a municipal self-governing port with independent finances. The facilities handle some 9.5 million tonnes of cargo a year (2012). Grain is the principal export, while feedstuffs, stone, cement and coal are among the chief imports. Since 2012 the port has faced increasing competition from the Port of Hamburg and freight volumes have decreased somewhat from the peak in 2008. The ferry terminal presents the only alternative to the Great Belt Link for passenger transport between Jutland and Zealand. It has served different ferry companies since the first steamship route to Copenhagen opened in 1830. Currently, Mols-Linien operates the route and annually transports some two million passengers and a million vehicles. Additional roll-on/roll-off cargo ferries serve Finland and Kalundborg on a weekly basis and smaller outlying Danish ports at irregular intervals. Since the early 2000s the port has increasingly become a destination for cruise lines operating in the Baltic Sea. Tourism The ARoS Art Museum, the Old Town Museum and Tivoli Friheden are among Denmark's top tourist attractions. With a combined total of almost 1.4 million visitors they represent the driving force behind tourism but other venues such as Moesgård Museum and Kvindemuseet are also popular. The city's extensive shopping facilities are also said to be a major attraction for tourists, as are festivals, especially NorthSide and SPOT. Many visitors arrive on cruise ships: in 2012, 18 vessels visited the port with over 38,000 passengers. In the 2010s, there was a significant expansion of tourist facilities, culminating in the opening of the 240-room Comwell Hotel in July 2014, which increased the number of hotel rooms in the city by 25%. Some estimates put the number of visitors spending at least one night as high as 750,000 a year, most of them Danes from other regions, with the remainder coming mainly from Norway, Sweden, northern Germany and the United Kingdom. Overall, they spend roughly DKK 3 billion (€402 million) in the city each year. The primary motivation for tourists choosing Aarhus as a destination is experiencing the city and culture, family and couples vacation or as a part of a round trip in Denmark. The average stay is little more than three days on average. There are more than 30 tourist information spots across the city. Some of them are staffed, while others are online, publicly accessible touchscreens. The official tourist information service in Aarhus is organised under VisitAarhus, a corporate foundation initiated in 1994 by Aarhus Municipality and local commercial interest organisations. Research parks The largest research park in Aarhus is INCUBA Science Park, focused on IT and biomedical research, It is based on Denmark's first research park, Forskerpark Aarhus (Research Park Aarhus), founded in 1986, which in 2007 merged with another research park to form INCUBA Science Park. The organisation is owned partly by Aarhus University and private investors and aims to foster close relationships between public institutions and startup companies. It is physically divided across 4 locations after a new department was inaugurated in Navitas Park in 2015, which it will share with the Aarhus School of Marine and Technical Engineering and AU Engineering. Another major centre for knowledge is Agro Food Park in Skejby, established to facilitate co-operation between companies and public institutions working within food science and agriculture. In January 2017 Arla Foods will open the global innovation centre Arla Nativa in Agro Food Park and in 2018 Aarhus University is moving the Danish Centre for Food and Agriculture there as well. In 2016, some 1000 people worked at Agro Food Park, spread across 50 companies and institutions and in August 2016 Agro Food Park management published plans to expand facilities from 92,000 m2 to . In addition, Aarhus is home to the Aarhus School of Architecture, one of two Danish Ministry of Education institutions that provide degree programs in architecture, and some of the largest architecture firms in the Nordic countries such as Schmidt Hammer Lassen Architects, Arkitema Architects and C. F. Møller Architects. Taken together these organisations form a unique concentration of expertise and knowledge in architecture outside Copenhagen, which the Danish Ministry of Business and Growth refers to as (the architecture cluster). To promote the "cluster", the School of Architecture will be given new school buildings centrally in the new Freight Station Neighborhood, planned for development in the 2020s. In the interim, the city council supports a culture, business and education centre in the area, which may continue in the future neighbourhood in some form. The future occupants of the neighbourhood will be businesses and organisations selected for their ability to be involved in the local community, and it is hoped that the area will evolve into a hotspot for creativity and design. Cityscape Aarhus has developed in stages, from the Viking Age to modern times, all visible in the city today. Many architectural styles are represented in different parts of the city such as Romanesque, Gothic, Renaissance, Baroque, Rococo, National Romantic, Nordic Classicism, Neoclassical, Empire and Functionalism. The city has developed around the main transport hubs – the river, the harbour, and later the railway station – and as a result, the oldest parts are also the most central and busiest today. The streets of Volden (The Rampart) and Graven (The Moat) testify to the defences of the initial Viking town, and Allégaderingen in Midtbyen roughly follows the boundaries of that settlement. The street network in the inner city formed during the Middle Ages with narrow, curved streets and low, dense housing by the river and the coast. Vesterport (Westward Gate) still bears the name of the medieval city gate and the narrow alleyways Posthussmøgen and Telefonsmøgen are remnants of toll stations from that time. The inner city has the oldest preserved buildings, especially the Latin Quarter, with houses dating back to the early 17th century in Mejlgade and Skolegade. Medieval merchants' mansions with courtyards can be seen in Klostergade, Studsgade and Skolegade. By far, the largest part of the present-day city was built during and after the industrialization of the late 1800s, and the most represented architectural styles today are historicism and modernism, especially the subgenre of Danish functionalism of which there are many fine examples. The building boom of the 2000s has imprinted itself on Aarhus with a redeveloped harbourfront, many new neighbourhoods (also in the inner city), and a revitalized public space. It is also beginning to change the skyline with several dominating high-rises. Developments In recent years, Aarhus has experienced a large demand in housing and offices, spurring a construction boom in some parts of the city. The newly built city district of Aarhus Ø, formerly docklands, includes major housing developments, mostly consisting of privately owned apartments, designed by architects such as CEBRA, and JDS Architects. In the second quarter of 2012, the population of the area stood at only 5; however, that number had risen to 3,940 by October 2019. The main public transportation service is bus line 23, as well as Østbanetorvet train station. Plans to service the area by the light rail line Aarhus Letbane have now been shelved. Landmarks Aarhus Cathedral (Århus Domkirke) in the centre of Aarhus, is the longest and tallest church in Denmark at and in length and height respectively. Originally built as a Romanesque basilica in the 13th century, it was rebuilt and enlarged as a Gothic cathedral in the late 15th and early 16th centuries. Even though the cathedral stood finished around 1300, it took more than a century to build; the associated cathedral school of Aarhus Katedralskole was already founded in 1195 and ranks as the 44th oldest school in the world. Another important and historic landmark in the inner city, is the Church of Our Lady (Vor Frue Kirke) also from the 13th century in Romanesque and Gothic style. It is smaller and less impressive, but it was the first cathedral of Aarhus and founded on an even older church constructed in 1060; the oldest stone church in Scandinavia. Langelandsgade Kaserne in National Romantic Style from 1889 is the oldest former military barracks left in the country; home to the university Department of Aesthetics and Communication since 1989. Marselisborg Palace (Marselisborg Slot), designed by Hack Kampmann in Neoclassical and Art Nouveau styles, was donated by the city to Prince Christian and Princess Alexandrine as a wedding present in 1898. The Aarhus Custom House (Toldkammeret) from 1898, is said to be Hack Kampmann's finest work. Tivoli Friheden (Tivoli Freedom) opened in 1903 and has since been the largest amusement park in the city and a tourist attraction. Aarhus Theatre from 1916 in the Art Nouveau style is the largest provincial theatre in Denmark. The early buildings of Aarhus University, especially the main building completed in 1932, designed by Kay Fisker, Povl Stegmann and by C.F. Møller have gained an international reputation for their contribution to functionalist architecture. The City Hall (Aarhus Rådhus) from 1941 with an iconic tower clad in marble, was designed by Arne Jacobsen and Erik Møller in a modern Functionalist style. Culture Aarhus is home to many annual cultural events and festivals, museums, theatres, and sports events of both national and international importance, and presents some of the largest cultural attractions in Denmark. There is a long tradition of music from all genres, and many Danish bands have emerged from Aarhus. Libraries, cultural centres and educational institutions present free or easy opportunities for the citizens to participate in, engage in, or be creative with cultural events and productions of all kinds. Since 1938, Aarhus has marketed itself as Smilets by (City of smiles) which has become both an informal moniker and official slogan. In 2011, the city council opted to change the slogan to "Aarhus. Danish for Progress" but it was unpopular and abandoned after just a few years. Other slogans that have occasionally been used are Byen ved havet (City by the sea), Mellem bugt og bøgeskov (Between bay and beechwood) and Verdens mindste storby (World's smallest big city). Aarhus is featured in popular songs such as Hjem til Aarhus by På Slaget 12, Lav sol over Aarhus by Gnags, 8000 Aarhus C by Flemming Jørgensen, Pigen ud af Aarhus by Tina Dickow and Slingrer ned ad Vestergade by Gnags. In 1919, the number Sangen til Aarhus (Song to Aarhus) had become a popular hit for a time, but the oldest and perhaps best known "national anthem" for the city is the classical Aarhus Tappenstreg from 1872 by Carl Christian Møller which is occasionally played at official events or at performances by local marching bands and orchestras. Museums Aarhus has a range of museums, including two of the largest in the country, measured by the number of paying guests, Den Gamle By and ARoS Aarhus Kunstmuseum. Den Gamle By (The Old Town), officially Danmarks Købstadmuseum (Denmark's Market Town Museum), presents Danish townscapes from the 16th century to the 1970s with individual areas focused on different time periods. 75 historic buildings collected from different parts of the country have been brought here to create a small town in its own right. ARoS Aarhus Kunstmuseum, the city's main art museum, is one of the largest art museums in Scandinavia with a collection covering Danish art from the 18th century to the present day as well as paintings, installations and sculptures representing international art movements and artists from all over the world. The iconic glass structure on the roof, Your Rainbow Panorama, was designed by Olafur Eliasson and features a promenade offering a colourful panorama of the city. The Moesgård Museum specialises in archaeology and ethnography in collaboration with Aarhus University with exhibits on Denmark's prehistory, including weapon sacrifices from Illerup Ådal and the Grauballe Man. Kvindemuseet, the Women's Museum, from 1984 contains collections of the lives and works of women in Danish cultural history. The Occupation Museum (Besættelsesmuseum) presents exhibits illustrating the German occupation of the city during the Second World War; the University Park on the campus of Aarhus University includes the Natural History Museum with 5,000 species of animals, many in their natural surroundings; and the Steno Museum is a museum of the history of science and medicine with a planetarium. Kunsthal Aarhus (Aarhus Art Hall) hosts exhibitions of contemporary art including painting, sculpture, photography, performance art, film and video. Strictly speaking it is not a museum but an arts centre, one of the oldest in Europe, built and founded in 1917. Libraries and community centres Public libraries in Denmark are also cultural and community centres. They play an active role in cultural life and host many events, exhibitions, discussion groups, workshops, educational courses and facilitate everyday cultural activities for and by the citizens. In June 2015, the large central library and cultural centre of Dokk1 opened at the harbour front. Dokk1 also includes civil administrations and services, commercial office rentals and a large underground robotic car park and aims to be a landmark for the city and a public meeting place. The building of Dokk1 and the associated squares and streetscape is also collectively known as Urban Mediaspace Aarhus and it is the largest construction project Aarhus municipality has yet undertaken. Apart from this large main library, some neighbourhoods in Aarhus have a local library engaged in similar cultural and educational activities, but on a more local scale. The State Library (Statsbiblioteket) at the university campus has status of a national library. The city is a member of the ICORN organisation (International Cities of Refuge Network) in an effort to provide a safe haven to authors and writers persecuted in their countries of origin. There are several cultural and community centres throughout the city. This includes Folkestedet in the central Åparken, facilitating events for and by non-commercial associations, organisations and clubs, and activities for the elderly, the nearby Godsbanen at the railway yard, with workshops, events and exhibitions, and Globus1 in Brabrand facilitating sports and various cultural activities. Performing arts The city enjoys strong musical traditions, both classical and alternative, underground and popular, with educational and performance institutions such as the concert halls of Musikhuset, the opera of Den Jyske Opera, Aarhus Symfoniorkester (Aarhus Symphony Orchestra) and Det Jyske Musikkonservatorium (Royal Academy of Music, Aarhus/Aalborg). Musikhuset is the largest concert hall in Scandinavia, with seating for more than 3,600 people. Other major music venues include VoxHall, rebuilt in 1999, and the associated venue of Atlas, Train nightclub at the harbourfront, and Godsbanen, a former rail freight station. The acting scene in Aarhus is diverse, with many groups and venues engaged in a broad span of genres, from animation theatre and children's theatre to classical theatre and improvisational theatre. Aarhus Teater is the oldest and largest venue with mostly professional classical acting performances. Svalegangen, the second largest theatre, is more experimental with its performances and other notable groups and venues includes EntréScenen, Katapult, Gruppe 38, Helsingør Teater, Det Andet Teater and Teater Refleksion as well as dance venues like Bora Bora. The cultural center of Godsbanen includes several scenes and stages and the Concert Halls of Musikhuset also stage theatrical plays regularly and is home to the children's theatre Filuren and a comedy club. The city hosts a biannual international theatre festival, International Living Theatre (ILT), with the next event being scheduled for 2021. Since 2010 the music production centre of PROMUS (Produktionscentret for Rytmisk Musik) has supported the rock scene in the city along with the publicly funded ROSA (Dansk Rock Samråd), which promotes Danish rock music in general. Aarhus is known for its musical history. Fuelled by a relatively young population jazz clubs sprang up in the 1950s which became a tour stop for many iconic American Jazz musicians. By the 1960s, the music scene diversified into rock and other genres and in the 1970s and 1980s, Aarhus became a centre for rock music, fostering iconic bands such as Kliché, TV-2 and Gnags and artists such as Thomas Helmig and Anne Linnet. Acclaimed bands since the 1970s include Under Byen, Michael Learns to Rock, Nephew, Carpark North, Spleen United, VETO, Hatesphere and Illdisposed in addition to individual performers such as Medina and Tina Dico. Events and festivals Aarhus hosts many annual or recurring festivals, concerts and events, with the festival of Aarhus Festuge as the most popular and wide-ranging, along with large sports events. Aarhus Festuge is the largest multicultural festival in Scandinavia, always based on a special theme and takes place every year for ten days between late August and early September, transforming the inner city with festive activities and decorations of all kinds. There are numerous music festivals; the eight-day Aarhus Jazz Festival features jazz in many venues across the city. It was founded in 1988 and usually takes place in July every year, occasionally August or September. There are several annually recurring music festivals for contemporary popular music in Aarhus. NorthSide Festival presents well-known bands every year in mid-June on large outdoor scenes. It is a relatively new event, founded in 2010, but grew from a one-day event to a three-day festival in its first three years, now with 35,000 paying guests in 2015. Spot festival is aiming to showcase up-and-coming Danish and Scandinavian talents at selected venues of the inner city. The outdoor Grøn Koncert music festival takes place every year in many cities across Denmark, including Aarhus. Danmarks grimmeste festival (lit. Denmark's ugliest Festival) is a small summer music festival held in Skjoldhøjkilen, Brabrand. Aarhus also hosts recurring events dedicated to specific art genres. International Living Theatre (ILT) is a bi-annual festival, established in 2009, with performing arts and stage art on a broad scale. The festival has a vision of showing the best plays and stage art experiences of the world, while at the same time attracting thespians and stage art interested people from both Aarhus and Europe at large. LiteratureXchange is a new annual festival from 2018, focused on literature from around the world as well as regional talents. The city actively promotes its gay and lesbian community and celebrates the annual Aarhus Pride gay pride festival while Aarhus Festuge usually includes exhibits, concerts and events designed for the LGBT communities. Notable events of a local scope include the university boat-race, held in the University Park since 1991, which has become a local spectator event attracting some 20,000 people. The boat race pits costumed teams from the university departments against each other in inflatable boats in a challenge to win the Gyldne Bækken (Golden Chamber Pot) trophy. The annual lighting of the Christmas lights on the Salling department store in Søndergade has also become an attraction in recent times, packing the pedestrianised city centre with thousands of revellers. Significant dates such as Saint Lucy's Day, Sankt Hans (Saint John's Eve) and Fastelavn are traditionally celebrated with numerous events across the city. Parks, nature, and recreation The beech forests of Riis Skov and Marselisborg occupy the hills along the coast to the north and south, and apart from the city centre, sandy beaches form the coastline of the entire municipality. There are two public sea baths, the northern Den Permanente below Riis Skov and close to the harbour area, and the southern Ballehage Beach in the Marselisborg Forests. As in most of Denmark, there are no private beaches in the municipality, but access to Den Permanente requires a membership, except in the summer. The relatively mild, temperate marine climate, allows for outdoor recreation year round, including walking, hiking, cycling, and outdoor team sports. Mountain biking is usually restricted to marked routes. Watersports like sailing, kayaking, motor boating, etc. are also popular, and since the bay rarely freezes up in winter, they can also be practised most of the year. Recreational and transportational pathways for pedestrians and cyclists, radiate from the city centre to the countryside, providing safety from motorised vehicles and a more tranquil experience. This includes the 19 kilometre long pathway of Brabrandstien, encircling the Brabrand Lake. The long-range hiking route Aarhus-Silkeborg, starts off from Brabrandstien. Aarhus has an unusually high number of parks and green spaces, 134 of them, covering a total area of around . The central Botanical Gardens (Botanisk Have) from 1875 are a popular destination, as they include The Old Town open-air museum and host a number of events throughout the year. Originally used to cultivate fruit trees and other useful plants for the local citizens, there are now a significant collection of trees and bushes from different habitats and regions of the world, including a section devoted to native Danish plants. Recently renovated tropical and subtropical greenhouses, exhibit exotic plants from throughout the world. Also in the city centre is the undulating University Park, recognised for its unique landscaped design with large old oak trees. The Memorial Park (Mindeparken) at the coast below Marselisborg Palace, offers a panoramic view across the Bay of Aarhus and is popular with locals for outings, picnics or events. Other notable parks include the small central City Hall Park (Rådhusparken) and Marienlyst Park (Marienlystparken). Marienlyst Park is a relatively new park from 1988, situated in Hasle out of the inner city and is less crowded, but it is the largest park in Aarhus, including woodlands, large open grasslands and soccer fields. Marselisborg Forests and Riis Skov, has a long history of recreational activities of all kinds, including several restaurants, hotels and opportunities for green exercise. There are marked routes here for jogging, running and mountain biking and large events are hosted regularly. This includes running events, cycle racing and orienteering, the annual Classic Race Aarhus with historic racing cars, all attracting thousands of people. Marselisborg Deer Park (Marselisborg Dyrehave) in Marselisborg Forests, comprises of fenced woodland pastures with free-roaming sika and roe deer. Below the Moesgård Museum in the southern parts of the Marselisborg Forests, is a large historical landscape of pastures and woodlands, presenting different eras of Denmark's prehistory. Sections of the forest comprise trees and vegetation representing specific climatic epochs from the last Ice Age to the present. Dotted across the landscape are reconstructed Stone Age and Bronze Age graves, buildings from the Iron Age, Viking Age and medieval times, with grazing goats, sheep and horses in between. Food, drink, and nightlife Aarhus has a large variety of restaurants and eateries offering food from cultures all over the world, especially Mediterranean and Asian, but also international gourmet cuisine, traditional Danish food and New Nordic Cuisine. Among the oldest restaurants are Rådhuscafeen (lit. The City Hall Café), opened in 1924, serving a menu of traditional Danish meals, and Peter Gift from 1906, a tavern with a broad beer selection and a menu of smørrebrød and other Danish dishes. In Aarhus, New Nordic can be experienced at Kähler Villa Dining, Hærværk and Domestic, but local produce can be had at many places, especially at the twice-weekly food markets in Frederiksbjerg. Aarhus and Central Denmark Region was selected as European Region of Gastronomy in 2017. The city (and municipality) is a member of the Délice Network, an international non-profit organization nurturing and facilitating knowledge exchange in gastronomy. Appraised high-end restaurants serving international gourmet cuisine include Frederikshøj, Substans, Gastromé, Det Glade Vanvid, Nordisk Spisehus, Restaurant Varna, Restaurant ET, Gäst, Brasserie Belli, Møf. Restaurants in Aarhus were the first in provincial Denmark to receive Michelin stars since 2015, when Michelin inspectors ventured outside Copenhagen for the first time. Vendors of street food are numerous throughout the centre, often selling from small trailers on permanent locations formally known as Pølsevogne (lit. sausage wagons), traditionally serving a Danish variety of hot dogs, sausages and other fast food. There are increasingly more outlets inspired by other cultural flavours such as sushi, kebab and currywurst. The city centre is packed with cafés, especially along the river and the Latin quarter. Some of them also include an evening restaurant, such as Café Casablanca, Café Carlton, Café Cross and Gyngen. Aarhus Street Food and Aarhus Central Food Market are two indoor food courts from 2016 in the city centre, comprising a variety of street food restaurants, cafés and bars. Aarhus has a robust and diverse nightlife. The action tends to concentrate in the inner city, with the pedestrianised riverside, Frederiksgade, the Latin Quarter, and Jægergårdsgade on Frederiksbjerg as the most active centres at night, but things are stirring elsewhere around the city too. The nightlife scene offers everything from small joints with cheap alcohol and a homely atmosphere to fashionable nightclubs serving champagne and cocktails or small and large music venues with bars, dance floors and lounges. A short selection of well-established places where you can have a drink and socialise, include the fashionable lounge and night club Kupé at the harbourfront, the relaxed Ris Ras Filliongongong offering waterpipes and an award-winning beer selection, Fatter Eskild with a broad selection of Danish bands playing mostly blues and rock, the wine and book café Løve's in Nørregade, Sherlock Holmes, a British-style pub with live music, and the brew pub of Sct. Clemens, with A Hereford Beefstouw restaurant across the cathedral. A few nightlife spots are aimed at gays and lesbians specifically, including Gbar (nightclub) and Café Sappho. The Århus Set (Danish: Århus Sæt) is a set of drinks often ordered together, named for the city and consisting of two beverages, one Ceres Top beer and one shot Arnbitter, both originally from Aarhus. Ordering "a set" suffices in most bars and pubs. Aarhus Bryghus is a local craft brewery with a sizeable production. The brewery is located in the southern district of Viby and a large variety of their craft brews are available there, in most larger well-assorted stores in the city, and in some bars and restaurants as well. They also export. Local dialect The Aarhus dialect, commonly called Aarhusiansk (Aarhusian in English), is a Jutlandic dialect in the Mid-Eastern Jutland dialect area, traditionally spoken in and around Aarhus. Aarhusian, as with most local dialects in Denmark, has diminished in use through the 20th century and most Danes today speak some version of Standard Danish with slight regional features. Aarhusian, however, still has a strong presence in older segments of the population and in areas with high numbers of immigrants. Some examples of common, traditional and unique Aarhusian words are: træls ('tiresome'), noller ('silly' or 'dumb') and dælme (excl. 'damn me!'). The dialect is notable for single-syllable words ending in "d" being pronounced with stød while the same letter in multiple-syllable words is pronounced as "j", i.e., Odder is pronounced "Ojjer". Like other dialects in East Jutland, it has two grammatical genders, similar to Standard Danish, but different from West Jutlandic dialects, which have only one. In 2009, the University of Aarhus compiled a list of contemporary public figures who best exemplify the dialect, including Jacob Haugaard, Thomas Helmig, Steffen Brandt, Stig Tøfting, Flemming Jørgensen, Tina Dickow and Camilla Martin. In popular culture, the dialect features prominently in Niels Malmros's movie Aarhus by Night and in 90s comedy sketches by Jacob Haugaard and Finn Nørbygaard. Sports Aarhus has three major men's professional sports teams: the Superliga team Aarhus Gymnastikforening (AGF), Danish Handball League's Aarhus GF Håndbold, and Danish Basketball League's Bakken Bears. Notable or historic clubs include Aarhus 1900, Aarhus Fremad, Idrætsklubben Skovbakken and Aarhus Sejlklub. Aarhus Idrætspark has hosted matches in the premiere Danish soccer league since it was formed in 1920 and matches for the national men's soccer team in 2006 and 2007. The five sailing clubs routinely win national and international titles in a range of disciplines and the future national watersports stadium will be located on the Aarhus Docklands in the city centre. The Bakken Bears won the Danish basketball championships in 2011, 2012, 2013 and 2014. The municipality actively supports sports organisations in and around the city, providing public organisations that aim to attract major sporting events and strengthen professional sports. The National Olympic Committee and Sports Confederation of Denmark counts some 380 sports organisations within the municipality and about one third of the population are members of one. Soccer is by far the most popular sport followed by Gymnastics, Handball and Badminton. In recent decades, many free and public sports facilities have sprung up across the city, such as street football, basketball, climbing walls, skateboarding and beach volley. Several natural sites also offer green exercise, with exercise equipment installed along the paths and tracks reserved for mountain biking. The newly reconstructed area of Skjoldhøjkilen is a prime example. Aarhus has hosted many sporting events including the 2010 European Women's Handball Championship, the 2014 European Men's Handball Championship, the 2013 Men's European Volleyball Championships, the 2005 European Table Tennis Championships, the Denmark Open in badminton, the UCI Women's Road Cycling World Cup, the 2006 World Orienteering Championships, the 2006 World Artistic Gymnastics Championships and the GF World Cup (women's handball). On average, Aarhus is hosting one or two international sailing competitions every year. In 2008, the city hosted the ISAF Youth Sailing World Championships and in 2018 it was host to the ISAF Sailing World Championships, the world championship for the 12 Olympic sailing disciplines. Aarhus is an important qualifier for the 2020 Olympics. Education Aarhus is the principal centre for education in the Jutland region. It draws students from a large area, especially from the western and southern parts of the peninsula. The relatively large influx of young people and students creates a natural base for cultural activities. Aarhus has the greatest concentration of students in Denmark, fully 12% of citizens attending short, medium or long courses of study. In addition to around 25 institutions of higher education, several research forums have evolved to assist in the transfer of expertise from education to business. The city is home to more than 52,000 students. Since 2012, Aarhus University (AU) has been the largest university in Denmark by number of students enrolled. It is ranked among the top 100 universities in the world by several of the most influential and respected rankings. The university has approximately 41,500 Bachelor and Master students enrolled as well as about 1,500 PhD students. It is possible to engage in higher academic studies in many areas, from the traditional spheres of natural science, humanities and theology to more vocational academic areas like engineering and dentistry. Aarhus Tech is one of the largest technical colleges in Denmark, teaching undergraduate study programmes in English, including vocational education and training (VET), continuing vocational training (CVT), and human resource development. Business Academy Aarhus is among the largest business academies in Denmark and offers undergraduate and some academic degrees, in IT, business and technical fields. The academic level technical aspects are covered in a collaboration with Aarhus Tech, Aarhus School of Marine and Technical Engineering and Aarhus Educational Centre for Agriculture. The Danish School of Media and Journalism (DMJX) is the oldest and largest of the colleges, offering journalism courses since 1946, with approximately 1,700 students as of 2014. DMJX has been an independent institution since 1974, conducting research and teaching at undergraduate level, and in 2004, master's courses in journalism was established in a collaboration with Aarhus University. The latter is offered through the Centre for University studies in journalism, granting degrees through the university. The Royal Academy of Music in Aarhus (Det Jyske Musikkonservatorium) is a conservatoire, established under the auspices of the Danish Ministry of Culture in 1927. In 2010, it merged administratively with the Royal Academy of Music in Aalborg, which was founded in 1930. Under the patronage of His Royal Highness Crown Prince Frederik, it offers graduate level studies in areas such as music teaching, and solo and professional musicianship. VIA University College was established in January 2008 and is one of eight new regional organisations offering bachelor courses of all kinds, throughout the Central Denmark Region. It offers over 50 higher educations, taught in Danish or sometimes in English, with vocational education and it participates in various research and development projects. Aarhus School of Architecture (Arkitektskolen Aarhus) was founded in 1965. Along with the Royal Danish Academy of Fine Arts of Copenhagen, it is responsible for the education of architects in Denmark. With an enrolment of approximately 900 students, it teaches in five main departments: architecture and aesthetics, urban and landscape, architectonic heritage, design and architectural design. Transport Aarhus has two ring roads; Ring 1, roughly encircling the central district of Aarhus C, and the outlying Ring 2. Six major intercity motorways radiate from the city centre, connecting with nearby cities Grenå, Randers, Viborg, Silkeborg, Skanderborg and Odder. In the inner city, motorised traffic is highly regulated, larger parts are pedestrianised and in the 2000s, a system of roads prioritised for cyclists have been implemented, connecting to suburban areas. The main railway station in Aarhus is Aarhus Central Station located in the city centre. DSB has connections to destinations throughout Denmark and also services to Flensburg and Hamburg in Germany. Aarhus Letbane is a local electric light rail or tram system that opened in December 2017, connecting the central station and the inner city with the University Hospital in Skejby and also replaced local railway services to Grenaa and Odder in late 2018. It is the first electric light rail system in Denmark and more routes are planned to open in coming years. Tickets for the light rail are also available in local yellow bus lines. Most city bus lines go through the inner city and pass through either Park Allé or Banegårdspladsen, or both, right at the central station. Regional and Inter-city buses terminate at Aarhus Bus Terminal, just east of the central station. FlixBus provides long-distance buses that travel to other cities in Denmark and Europe. Ferries administered by Danish ferry company Mols-Linien transports passengers and motorvehicles between Aarhus and Sjællands Odde on Zealand. The ferries comprises HSC KatExpress 1 and HSC KatExpress 2, the world's largest diesel-powered catamarans, and HSC Max Mols. Aarhus Airport is located on Djursland, north-east of Aarhus near Tirstrup, and provides links to both Copenhagen and international destinations. The larger Billund Airport is situated south-west of Aarhus. There has been much discussion about constructing a new airport closer to the city for many years, but so far no plans have been realised. In August 2014, the city council officially initiated a process to assert the viability of a new international airport. A small seaplane now operates four flights daily between Aarhus harbour and Copenhagen harbour. Aarhus has a free bike sharing system, Aarhus Bycykler (Aarhus City Bikes). The bicycles are available from 1 April to 30 October at 57 stands throughout the city and can be obtained by placing a DKK 20 coin in a release slot, like caddies in a supermarket. The coin can be retrieved when the bike is returned at a random stand. Bicycles can also be hired from many shops. Healthcare Aarhus is home to Aarhus University Hospital, one of six Danish "Super Hospitals" officially established in 2007 when the regions reformed the Danish healthcare sector. The university hospital is the result of a series of mergers in the 2000s between the local hospitals of Skejby Sygehus, the Municipal Hospital, the County Hospital, Marselisborg Hospital and Risskov Psychiatric Hospital. It is today the largest hospital in Denmark with a combined staff of some 10,000 and 1,150 patient beds, and has been ranked the best hospital in Denmark consecutively since 2008. In 2012, construction of a new large hospital building began, known as Det Nye Universitetshospital (DNU) or 'The New University Hospital' in English, and it is centralising and accommodating all of the former departments, ending in 2019. The new hospital is divided in four clinical centres, a service centre and one administrative unit along with twelve research centres. Private hospitals specialised in different areas from plastic surgery to fertility treatments operate in Aarhus as well. Ciconia Aarhus Private Hospital founded in 1984 is a leading Danish fertility clinic and the first of its kind in Denmark. Ciconia has provided for the birth of 6,000 children by artificial insemination and continually conducts research into the field of fertility. Aagaard Clinic, established in 2004, is another private fertility and gynaecology clinic which since 2004 has undertaken fertility treatments that has resulted in 1550 births. Aarhus Municipality also offers a number of specialised services in the areas of nutrition, exercise, sex, smoking and drinking, activities for the elderly, health courses and lifestyle. Media The first daily newspaper to appear in Aarhus was Århus Stiftstidende, established in 1794 as Aarhuus Stifts Adresse-Contoirs Tidender, with a moderately conservative approach. Once one of Denmark's largest, it was a leading provincial newspaper for a time, but after the Second World War it increasingly faced competition from Demokraten (1884–1974) and , both published in Aarhus. In 1998, it merged with Randers Amtsavis and is now run by Midtjyske Medier, part of Berlingske Media. The daily newspaper of was established in 1871 in Aarhus, and takes a generally right-wing editorial approach. With a reputation as a serious news publication, the paper has always included news from Jutland in particular, but somewhat less so since its promotion as a national newspaper in the 1960s. Today it is one of the three bestselling serious newspapers in Denmark, the others being Berlingske and Politiken. Jyllands-Posten publishes JP Aarhus, a section dedicated to news in and around Aarhus, and hosted a free cityguide website from 2010 to 2016. The Copenhagen-based media company of Politiken, also publishes several free local papers once a week in parts of Denmark and Sweden. In Aarhus, they publish a total of five local newspapers; Aarhus Midt, Aarhus Nord, Aarhus Vest, Aarhus Syd and Aarhus Onsdag. Aarhus Onsdag (Aarhus Wednesday) is financed completely by advertisements and available in both paperform and online. It was bought from Århus Stiftstidende in June 2017, but has been published for many years previous. Danmarks Radio has a large department in Aarhus with over 200 employees. It runs the DR Østjylland radio programme, provides local contributions to DR P4, and produces local regional television programmes. In 1999, TV 2 moved its Jutland headquarters from Randers to Skejby in northern Aarhus. The station broadcasts regional news and current affairs television and radio programmes. Since 2012, it has run its own TV channel, TV 2 Østjylland. Aarhus has its own local TV channel TVAarhus, transmitting since 1984. After an agreement on 1 July 2014, TVAarhus can be watched by 130,000 households in Aarhus, making it the largest cable-transmitted local TV channel in Denmark. With over 1,700 students, the Danish School of Media and Journalism (Danmarks Medie- og Journalisthøjskole) is the country's largest and oldest school of journalism. The school works closely with Aarhus University, where the first journalism course was established in 1946. In 2004, the two institutions established the Centre for University Studies in Journalism, which offers master's courses. International relations Aarhus is home to 32 consulates: Aarhus practices twinning on the municipal level. For the twin towns, see twin towns of Aarhus Municipality. Notable people Citations Notes References Publications Further reading External links Aarhus Kommune Official municipal and city portal Visit Aarhus Official tourist site Cities and towns in the Central Denmark Region Cities and towns in Aarhus Municipality Municipal seats of the Central Denmark Region Municipal seats of Denmark Port cities and towns in Denmark Viking Age populated places	18
Algorithms for calculating variance play a major role in computational statistics. A key difficulty in the design of good algorithms for this problem is that formulas for the variance may involve sums of squares, which can lead to numerical instability as well as to arithmetic overflow when dealing with large values. Naïve algorithm A formula for calculating the variance of an entire population of size N is: Using Bessel's correction to calculate an unbiased estimate of the population variance from a finite sample of n observations, the formula is: Therefore, a naïve algorithm to calculate the estimated variance is given by the following: Let For each datum : This algorithm can easily be adapted to compute the variance of a finite population: simply divide by n instead of n − 1 on the last line. Because and can be very similar numbers, cancellation can lead to the precision of the result to be much less than the inherent precision of the floating-point arithmetic used to perform the computation. Thus this algorithm should not be used in practice, and several alternate, numerically stable, algorithms have been proposed. This is particularly bad if the standard deviation is small relative to the mean. Computing shifted data The variance is invariant with respect to changes in a location parameter, a property which can be used to avoid the catastrophic cancellation in this formula. with any constant, which leads to the new formula the closer is to the mean value the more accurate the result will be, but just choosing a value inside the samples range will guarantee the desired stability. If the values are small then there are no problems with the sum of its squares, on the contrary, if they are large it necessarily means that the variance is large as well. In any case the second term in the formula is always smaller than the first one therefore no cancellation may occur. If just the first sample is taken as the algorithm can be written in Python programming language as def shifted_data_variance(data): if len(data) < 2: return 0.0 K = data[0] n = Ex = Ex2 = 0.0 for x in data: n += 1 Ex += x - K Ex2 += (x - K) 2 variance = (Ex2 - Ex2 / n) / (n - 1) # use n instead of (n-1) if want to compute the exact variance of the given data # use (n-1) if data are samples of a larger population return variance This formula also facilitates the incremental computation that can be expressed as K = Ex = Ex2 = 0.0 n = 0 def add_variable(x): global K, n, Ex, Ex2 if n == 0: K = x n += 1 Ex += x - K Ex2 += (x - K) 2 def remove_variable(x): global K, n, Ex, Ex2 n -= 1 Ex -= x - K Ex2 -= (x - K) 2 def get_mean(): global K, n, Ex return K + Ex / n def get_variance(): global n, Ex, Ex2 return (Ex2 - Ex2 / n) / (n - 1) Two-pass algorithm An alternative approach, using a different formula for the variance, first computes the sample mean, and then computes the sum of the squares of the differences from the mean, where s is the standard deviation. This is given by the following code: def two_pass_variance(data): n = len(data) mean = sum(data) / n variance = sum([(x - mean) 2 for x in data]) / (n - 1) return variance This algorithm is numerically stable if n is small. However, the results of both of these simple algorithms ("naïve" and "two-pass") can depend inordinately on the ordering of the data and can give poor results for very large data sets due to repeated roundoff error in the accumulation of the sums. Techniques such as compensated summation can be used to combat this error to a degree. Welford's online algorithm It is often useful to be able to compute the variance in a single pass, inspecting each value only once; for example, when the data is being collected without enough storage to keep all the values, or when costs of memory access dominate those of computation. For such an online algorithm, a recurrence relation is required between quantities from which the required statistics can be calculated in a numerically stable fashion. The following formulas can be used to update the mean and (estimated) variance of the sequence, for an additional element xn. Here, denotes the sample mean of the first n samples , their biased sample variance, and their unbiased sample variance. These formulas suffer from numerical instability , as they repeatedly subtract a small number from a big number which scales with n. A better quantity for updating is the sum of squares of differences from the current mean, , here denoted : This algorithm was found by Welford, and it has been thoroughly analyzed. It is also common to denote and . An example Python implementation for Welford's algorithm is given below. # For a new value new_value, compute the new count, new mean, the new M2. # mean accumulates the mean of the entire dataset # M2 aggregates the squared distance from the mean # count aggregates the number of samples seen so far def update(existing_aggregate, new_value): (count, mean, M2) = existing_aggregate count += 1 delta = new_value - mean mean += delta / count delta2 = new_value - mean M2 += delta * delta2 return (count, mean, M2) # Retrieve the mean, variance and sample variance from an aggregate def finalize(existing_aggregate): (count, mean, M2) = existing_aggregate if count < 2: return float("nan") else: (mean, variance, sample_variance) = (mean, M2 / count, M2 / (count - 1)) return (mean, variance, sample_variance) This algorithm is much less prone to loss of precision due to catastrophic cancellation, but might not be as efficient because of the division operation inside the loop. For a particularly robust two-pass algorithm for computing the variance, one can first compute and subtract an estimate of the mean, and then use this algorithm on the residuals. The parallel algorithm below illustrates how to merge multiple sets of statistics calculated online. Weighted incremental algorithm The algorithm can be extended to handle unequal sample weights, replacing the simple counter n with the sum of weights seen so far. West (1979) suggests this incremental algorithm: def weighted_incremental_variance(data_weight_pairs): w_sum = w_sum2 = mean = S = 0 for x, w in data_weight_pairs: w_sum = w_sum + w w_sum2 = w_sum2 + w*2 mean_old = mean mean = mean_old + (w / w_sum) (x - mean_old) S = S + w * (x - mean_old) * (x - mean) population_variance = S / w_sum # Bessel's correction for weighted samples # Frequency weights sample_frequency_variance = S / (w_sum - 1) # Reliability weights sample_reliability_variance = S / (w_sum - w_sum2 / w_sum) Parallel algorithm Chan et al. note that Welford's online algorithm detailed above is a special case of an algorithm that works for combining arbitrary sets and : . This may be useful when, for example, multiple processing units may be assigned to discrete parts of the input. Chan's method for estimating the mean is numerically unstable when and both are large, because the numerical error in is not scaled down in the way that it is in the case. In such cases, prefer . def parallel_variance(n_a, avg_a, M2_a, n_b, avg_b, M2_b): n = n_a + n_b delta = avg_b - avg_a M2 = M2_a + M2_b + delta*2 n_a * n_b / n var_ab = M2 / (n - 1) return var_ab This can be generalized to allow parallelization with AVX, with GPUs, and computer clusters, and to covariance. Example Assume that all floating point operations use standard IEEE 754 double-precision arithmetic. Consider the sample (4, 7, 13, 16) from an infinite population. Based on this sample, the estimated population mean is 10, and the unbiased estimate of population variance is 30. Both the naïve algorithm and two-pass algorithm compute these values correctly. Next consider the sample (, , , ), which gives rise to the same estimated variance as the first sample. The two-pass algorithm computes this variance estimate correctly, but the naïve algorithm returns 29.333333333333332 instead of 30. While this loss of precision may be tolerable and viewed as a minor flaw of the naïve algorithm, further increasing the offset makes the error catastrophic. Consider the sample (, , , ). Again the estimated population variance of 30 is computed correctly by the two-pass algorithm, but the naïve algorithm now computes it as −170.66666666666666. This is a serious problem with naïve algorithm and is due to catastrophic cancellation in the subtraction of two similar numbers at the final stage of the algorithm. Higher-order statistics Terriberry extends Chan's formulae to calculating the third and fourth central moments, needed for example when estimating skewness and kurtosis: Here the are again the sums of powers of differences from the mean , giving For the incremental case (i.e., ), this simplifies to: By preserving the value , only one division operation is needed and the higher-order statistics can thus be calculated for little incremental cost. An example of the online algorithm for kurtosis implemented as described is: def online_kurtosis(data): n = mean = M2 = M3 = M4 = 0 for x in data: n1 = n n = n + 1 delta = x - mean delta_n = delta / n delta_n2 = delta_n*2 term1 = delta delta_n * n1 mean = mean + delta_n M4 = M4 + term1 * delta_n2 * (n*2 - 3n + 3) + 6 * delta_n2 * M2 - 4 * delta_n * M3 M3 = M3 + term1 * delta_n * (n - 2) - 3 * delta_n * M2 M2 = M2 + term1 # Note, you may also calculate variance using M2, and skewness using M3 # Caution: If all the inputs are the same, M2 will be 0, resulting in a division by 0. kurtosis = (n * M4) / (M2*2) - 3 return kurtosis Pébaÿ further extends these results to arbitrary-order central moments, for the incremental and the pairwise cases, and subsequently Pébaÿ et al. for weighted and compound moments. One can also find there similar formulas for covariance. Choi and Sweetman offer two alternative methods to compute the skewness and kurtosis, each of which can save substantial computer memory requirements and CPU time in certain applications. The first approach is to compute the statistical moments by separating the data into bins and then computing the moments from the geometry of the resulting histogram, which effectively becomes a one-pass algorithm for higher moments. One benefit is that the statistical moment calculations can be carried out to arbitrary accuracy such that the computations can be tuned to the precision of, e.g., the data storage format or the original measurement hardware. A relative histogram of a random variable can be constructed in the conventional way: the range of potential values is divided into bins and the number of occurrences within each bin are counted and plotted such that the area of each rectangle equals the portion of the sample values within that bin: where and represent the frequency and the relative frequency at bin and is the total area of the histogram. After this normalization, the raw moments and central moments of can be calculated from the relative histogram: where the superscript indicates the moments are calculated from the histogram. For constant bin width these two expressions can be simplified using : The second approach from Choi and Sweetman is an analytical methodology to combine statistical moments from individual segments of a time-history such that the resulting overall moments are those of the complete time-history. This methodology could be used for parallel computation of statistical moments with subsequent combination of those moments, or for combination of statistical moments computed at sequential times. If sets of statistical moments are known: for , then each can be expressed in terms of the equivalent raw moments: where is generally taken to be the duration of the time-history, or the number of points if is constant. The benefit of expressing the statistical moments in terms of is that the sets can be combined by addition, and there is no upper limit on the value of . where the subscript represents the concatenated time-history or combined . These combined values of can then be inversely transformed into raw moments representing the complete concatenated time-history Known relationships between the raw moments () and the central moments () are then used to compute the central moments of the concatenated time-history. Finally, the statistical moments of the concatenated history are computed from the central moments: Covariance Very similar algorithms can be used to compute the covariance. Naïve algorithm The naïve algorithm is For the algorithm above, one could use the following Python code: def naive_covariance(data1, data2): n = len(data1) sum1 = sum(data1) sum2 = sum(data2) sum12 = sum([i1 i2 for i1, i2 in zip(data1, data2)]) covariance = (sum12 - sum1 * sum2 / n) / n return covariance With estimate of the mean As for the variance, the covariance of two random variables is also shift-invariant, so given any two constant values and it can be written: and again choosing a value inside the range of values will stabilize the formula against catastrophic cancellation as well as make it more robust against big sums. Taking the first value of each data set, the algorithm can be written as: def shifted_data_covariance(data_x, data_y): n = len(data_x) if n < 2: return 0 kx = data_x[0] ky = data_y[0] Ex = Ey = Exy = 0 for ix, iy in zip(data_x, data_y): Ex += ix - kx Ey += iy - ky Exy += (ix - kx) * (iy - ky) return (Exy - Ex * Ey / n) / n Two-pass The two-pass algorithm first computes the sample means, and then the covariance: The two-pass algorithm may be written as: def two_pass_covariance(data1, data2): n = len(data1) mean1 = sum(data1) / n mean2 = sum(data2) / n covariance = 0 for i1, i2 in zip(data1, data2): a = i1 - mean1 b = i2 - mean2 covariance += a * b / n return covariance A slightly more accurate compensated version performs the full naive algorithm on the residuals. The final sums and should be zero, but the second pass compensates for any small error. Online A stable one-pass algorithm exists, similar to the online algorithm for computing the variance, that computes co-moment : The apparent asymmetry in that last equation is due to the fact that , so both update terms are equal to . Even greater accuracy can be achieved by first computing the means, then using the stable one-pass algorithm on the residuals. Thus the covariance can be computed as def online_covariance(data1, data2): meanx = meany = C = n = 0 for x, y in zip(data1, data2): n += 1 dx = x - meanx meanx += dx / n meany += (y - meany) / n C += dx * (y - meany) population_covar = C / n # Bessel's correction for sample variance sample_covar = C / (n - 1) A small modification can also be made to compute the weighted covariance: def online_weighted_covariance(data1, data2, data3): meanx = meany = 0 wsum = wsum2 = 0 C = 0 for x, y, w in zip(data1, data2, data3): wsum += w wsum2 += w * w dx = x - meanx meanx += (w / wsum) * dx meany += (w / wsum) * (y - meany) C += w * dx * (y - meany) population_covar = C / wsum # Bessel's correction for sample variance # Frequency weights sample_frequency_covar = C / (wsum - 1) # Reliability weights sample_reliability_covar = C / (wsum - wsum2 / wsum) Likewise, there is a formula for combining the covariances of two sets that can be used to parallelize the computation: Weighted batched version A version of the weighted online algorithm that does batched updated also exists: let denote the weights, and write The covariance can then be computed as See also Kahan summation algorithm Squared deviations from the mean Yamartino method References External links Statistical algorithms Statistical deviation and dispersion Articles with example pseudocode Articles with example Python (programming language) code	9
The almond (Prunus amygdalus, syn. Prunus dulcis) is a species of small tree from the genus Prunus, cultivated worldwide for its seed, a culinary nut. Along with the peach, it is classified in the subgenus Amygdalus, distinguished from the other subgenera by corrugations on the shell (endocarp) surrounding the seed. The fruit of the almond is a drupe, consisting of an outer hull and a hard shell with the seed, which is not a true nut. Shelling almonds refers to removing the shell to reveal the seed. Almonds are sold shelled or unshelled. Blanched almonds are shelled almonds that have been treated with hot water to soften the seedcoat, which is then removed to reveal the white embryo. Once almonds are cleaned and processed, they can be stored over time. Almonds are used in many cuisines, often featuring prominently in desserts, such as marzipan. The almond tree prospers in a moderate Mediterranean climate with cool winter weather. Native to Iran and surrounding countries including the Levant, today it is rarely found wild in its original setting. Almonds were one of the earliest domesticated fruit trees, due to the ability to produce quality offspring entirely from seed, without using suckers and cuttings. Evidence of domesticated almonds in the Early Bronze Age has been found in the archeological sites of the Middle East, and subsequently across the Mediterranean region and similar arid climates with cool winters. California produces over half of the world's almond supply. Due to high acreage and water demand for almond cultivation, and need for pesticides, California almond production may be unsustainable, especially during the persistent drought and heat from climate change in the 21st century. Droughts in California have caused some producers to leave the industry, leading to lower supply and increased prices. Description The almond is a deciduous tree growing to in height, with a trunk of up to in diameter. The young twigs are green at first, becoming purplish where exposed to sunlight, then gray in their second year. The leaves are long, with a serrated margin and a petiole. The flowers are white to pale pink, diameter with five petals, produced singly or in pairs and appearing before the leaves in early spring. Almond grows best in Mediterranean climates with warm, dry summers and mild, wet winters. The optimal temperature for their growth is between and the tree buds have a chilling requirement of 200 to 700 hours below to break dormancy. Almonds begin bearing an economic crop in the third year after planting. Trees reach full bearing five to six years after planting. The fruit matures in the autumn, 7–8 months after flowering. The almond fruit is long. It is not a nut but a drupe. The outer covering, consisting of an outer exocarp, or skin, and mesocarp, or flesh, fleshy in other members of Prunus such as the plum and cherry, is instead a thick, leathery, gray-green coat (with a downy exterior), called the hull. Inside the hull is a woody endocarp which forms a reticulated, hard shell (like the outside of a peach pit) called the pyrena. Inside the shell is the edible seed, commonly called a nut. Generally, one seed is present, but occasionally two occur. After the fruit matures, the hull splits and separates from the shell, and an abscission layer forms between the stem and the fruit so that the fruit can fall from the tree. Taxonomy Sweet and bitter almonds The seeds of Prunus dulcis var. dulcis are predominantly sweet but some individual trees produce seeds that are somewhat more bitter. The genetic basis for bitterness involves a single gene, the bitter flavor furthermore being recessive, both aspects making this trait easier to domesticate. The fruits from Prunus dulcis var. amara are always bitter, as are the kernels from other species of genus Prunus, such as apricot, peach and cherry (although to a lesser extent). The bitter almond is slightly broader and shorter than the sweet almond and contains about 50% of the fixed oil that occurs in sweet almonds. It also contains the enzyme emulsin which, in the presence of water, acts on the two soluble glucosides amygdalin and prunasin yielding glucose, cyanide and the essential oil of bitter almonds, which is nearly pure benzaldehyde, the chemical causing the bitter flavor. Bitter almonds may yield 4–9 milligrams of hydrogen cyanide per almond and contain 42 times higher amounts of cyanide than the trace levels found in sweet almonds. The origin of cyanide content in bitter almonds is via the enzymatic hydrolysis of amygdalin. P450 monooxygenases are involved in the amygdalin biosynthetic pathway. A point mutation in a bHLH transcription factor prevents transcription of the two cytochrome P450 genes, resulting in the sweet kernel trait. Etymology The word almond comes from Old French or , Late Latin , , derived from from the Ancient Greek () (cf. amygdala, an almond-shaped portion of the brain). Late Old English had amygdales, "almonds". The adjective amygdaloid (literally 'like an almond') is used to describe objects which are roughly almond-shaped, particularly a shape which is part way between a triangle and an ellipse. For example, the amygdala of the brain uses a direct borrowing of the Greek term . Distribution and habitat Almond is native to Iran and its surrounding regions, including the Levant area. It was spread by humans in ancient times along the shores of the Mediterranean into northern Africa and southern Europe, and more recently transported to other parts of the world, notably California, United States. The wild form of domesticated almond grows in parts of the Levant. Selection of the sweet type from the many bitter types in the wild marked the beginning of almond domestication. It is unclear as to which wild ancestor of the almond created the domesticated species. The species Prunus fenzliana may be the most likely wild ancestor of the almond, in part because it is native to Armenia and western Azerbaijan, where it was apparently domesticated. Wild almond species were grown by early farmers, "at first unintentionally in the garbage heaps, and later intentionally in their orchards". Cultivation Almonds were one of the earliest domesticated fruit trees, due to "the ability of the grower to raise attractive almonds from seed. Thus, in spite of the fact that this plant does not lend itself to propagation from suckers or from cuttings, it could have been domesticated even before the introduction of grafting". Domesticated almonds appear in the Early Bronze Age (3000–2000 BC), such as the archaeological sites of Numeira (Jordan), or possibly earlier. Another well-known archaeological example of the almond is the fruit found in Tutankhamun's tomb in Egypt (c. 1325 BC), probably imported from the Levant. An article on almond tree cultivation in Spain is brought down in Ibn al-'Awwam's 12th-century agricultural work, Book on Agriculture. Of the European countries that the Royal Botanic Garden Edinburgh reported as cultivating almonds, Germany is the northernmost, though the domesticated form can be found as far north as Iceland. Varieties Almond trees are small to medium sized but commercial cultivars can be grafted onto a different root-stock to produce smaller trees. Varieties include: – originates in the 1800s. A large tree that produces large, smooth, thin-shelled almonds with 60–65% edible kernel per nut. Requires pollination from other almond varieties for good nut production. – originates in Italy. Has thicker, hairier shells with only 32% of edible kernel per nut. The thicker shell gives some protection from pests such as the navel orangeworm. Does not require pollination by other almond varieties. Mariana – used as a rootstock to result in smaller trees Breeding Breeding programmes have found the high shell-seal trait. Pollination The most widely planted varieties of almond are self-incompatible; hence these trees require pollen from a tree with different genetic characters to produce seeds. Almond orchards therefore must grow mixtures of almond varieties. In addition, the pollen is transferred from flower to flower by insects; therefore commercial growers must ensure there are enough insects to perform this task. The large scale of almond production in the U.S. creates a significant problem of providing enough pollinating insects. Additional pollinating insects are therefore brought to the trees. The pollination of California's almonds is the largest annual managed pollination event in the world, with 1.4 million hives (nearly half of all beehives in the US) being brought to the almond orchards each February. Much of the supply of bees is managed by pollination brokers, who contract with migratory beekeepers from at least 49 states for the event. This business was heavily affected by colony collapse disorder at the turn of the 21st century, causing a nationwide shortage of honey bees and increasing the price of insect pollination. To partially protect almond growers from these costs, researchers at the Agricultural Research Service, part of the United States Department of Agriculture (USDA), developed self-pollinating almond trees that combine this character with quality characters such as a flavor and yield. Self-pollinating almond varieties exist, but they lack some commercial characters. However, through natural hybridisation between different almond varieties, a new variety that was self-pollinating with a high yield of commercial quality nuts was produced. Diseases Almond trees can be attacked by an array of damaging microbes, fungal pathogens, plant viruses, and bacteria. Pests Pavement ants (Tetramorium caespitum), southern fire ants (Solenopsis xyloni), and thief ants (Solenopsis molesta) are seed predators. Bryobia rubrioculus mites are most known for their damage to this crop. Sustainability Almond production in California is concentrated mainly in the Central Valley, where the mild climate, rich soil, abundant sunshine and water supply make for ideal growing conditions. Due to the persistent droughts in California in the early 21st century, it became more difficult to raise almonds in a sustainable manner. The issue is complex because of the high amount of water needed to produce almonds: a single almond requires roughly of water to grow properly. Regulations related to water supplies are changing so some growers have destroyed their current almond orchards to replace with either younger trees or a different crop such as pistachio that needs less water. Sustainability strategies implemented by the Almond Board of California and almond farmers include: tree and soil health, and other farming practices minimizing dust production during the harvest bee health irrigation guidelines for farmers food safety use of waste biomass as coproducts with a goal to achieve zero waste use of solar energy during processing job development support of scientific research to investigate potential health benefits of consuming almonds international education about sustainability practices Production In 2020, world production of almonds was 4.1 million tonnes, led by the United States providing 57% of the world total (table). Other leading producers were Spain, Australia, and Iran. United States In the United States, production is concentrated in California where and six different almond varieties were under cultivation in 2017, with a yield of of shelled almonds. California production is marked by a period of intense pollination during late winter by rented commercial bees transported by truck across the U.S. to almond groves, requiring more than half of the total U.S. commercial honeybee population. The value of total U.S. exports of shelled almonds in 2016 was $3.2 billion. All commercially grown almonds sold as food in the U.S. are sweet cultivars. The U.S. Food and Drug Administration reported in 2010 that some fractions of imported sweet almonds were contaminated with bitter almonds, which contain cyanide. Spain Spain has diverse commercial cultivars of almonds grown in Catalonia, Valencia, Murcia, Andalusia, and Aragón regions, and the Balearic Islands. Production in 2016 declined 2% nationally compared to 2015 production data. The 'Marcona' almond cultivar is recognizably different from other almonds and is marketed by name. The kernel is short, round, relatively sweet, and delicate in texture. Its origin is unknown and has been grown in Spain for a long time; the tree is very productive, and the shell of the nut is very hard. Australia Australia is the largest almond production region in the Southern Hemisphere. Most of the almond orchards are located along the Murray River corridor in New South Wales, Victoria, and South Australia. Toxicity Bitter almonds contain 42 times higher amounts of cyanide than the trace levels found in sweet almonds. Extract of bitter almond was once used medicinally but even in small doses, effects are severe or lethal, especially in children; the cyanide must be removed before consumption. The acute oral lethal dose of cyanide for adult humans is reported to be of body weight (approximately 50 bitter almonds), so that for children consuming 5–10 bitter almonds may be fatal. Symptoms of eating such almonds include vertigo and other typical cyanide poisoning effects. Almonds may cause allergy or intolerance. Cross-reactivity is common with peach allergens (lipid transfer proteins) and tree nut allergens. Symptoms range from local signs and symptoms (e.g., oral allergy syndrome, contact urticaria) to systemic signs and symptoms including anaphylaxis (e.g., urticaria, angioedema, gastrointestinal and respiratory symptoms). Almonds are susceptible to aflatoxin-producing molds. Aflatoxins are potent carcinogenic chemicals produced by molds such as Aspergillus flavus and Aspergillus parasiticus. The mold contamination may occur from soil, previously infested almonds, and almond pests such as navel-orange worm. High levels of mold growth typically appear as gray to black filament-like growth. It is unsafe to eat mold-infected tree nuts. Some countries have strict limits on allowable levels of aflatoxin contamination of almonds and require adequate testing before the nuts can be marketed to their citizens. The European Union, for example, introduced a requirement since 2007 that all almond shipments to the EU be tested for aflatoxin. If aflatoxin does not meet the strict safety regulations, the entire consignment may be reprocessed to eliminate the aflatoxin or it must be destroyed. Breeding programs have found the trait. High shell-seal provides resistance against these Aspergillus species and so against the development of their toxins. Mandatory pasteurization in California After tracing cases of salmonellosis to almonds, the USDA approved a proposal by the Almond Board of California to pasteurize almonds sold to the public. After publishing the rule in March 2007, the almond pasteurization program became mandatory for California companies effective 1 September 2007. Raw, untreated California almonds have not been available in the U.S. since then. California almonds labeled "raw" must be steam-pasteurized or chemically treated with propylene oxide (PPO). This does not apply to imported almonds or almonds sold from the grower directly to the consumer in small quantities. The treatment also is not required for raw almonds sold for export outside of North America. The Almond Board of California states: "PPO residue dissipates after treatment". The U.S. Environmental Protection Agency has reported: "Propylene oxide has been detected in fumigated food products; consumption of contaminated food is another possible route of exposure". PPO is classified as Group 2B ("possibly carcinogenic to humans"). The USDA-approved marketing order was challenged in court by organic farmers organized by the Cornucopia Institute, a Wisconsin-based farm policy research group which filed a lawsuit in September 2008. According to the institute, this almond marketing order has imposed significant financial burdens on small-scale and organic growers and damaged domestic almond markets. A federal judge dismissed the lawsuit in early 2009 on procedural grounds. In August 2010, a federal appeals court ruled that the farmers have a right to appeal the USDA regulation. In March 2013, the court vacated the suit on the basis that the objections should have been raised in 2007 when the regulation was first proposed. Uses Nutrition Almonds are 4% water, 22% carbohydrates, 21% protein, and 50% fat (table). In a reference amount, almonds supply of food energy. The almond is a nutritionally dense food (table), providing a rich source (20% or more of the Daily Value, DV) of the B vitamins riboflavin and niacin, vitamin E, and the essential minerals calcium, copper, iron, magnesium, manganese, phosphorus, and zinc. Almonds are a moderate source (10–19% DV) of the B vitamins thiamine, vitamin B6, and folate, choline, and the essential mineral potassium. They also contain substantial dietary fiber, the monounsaturated fat, oleic acid, and the polyunsaturated fat, linoleic acid. Typical of nuts and seeds, almonds are a source of phytosterols such as beta-sitosterol, stigmasterol, campesterol, sitostanol, and campestanol. Health Almonds are included as a good source of protein among recommended healthy foods by the U.S. Department of Agriculture (USDA). A 2016 review of clinical research indicated that regular consumption of almonds may reduce the risk of heart disease by lowering blood levels of LDL cholesterol. Culinary While the almond is often eaten on its own, raw or toasted, it is also a component of various dishes. Almonds are available in many forms, such as whole, slivered, and ground into flour. Almond pieces around in size, called "nibs", are used for special purposes such as decoration. Almonds are a common addition to breakfast muesli or oatmeal. Desserts A wide range of classic sweets feature almonds as a central ingredient. Marzipan was developed in the Middle Ages. Since the 19th century almonds have been used to make bread, almond butter, cakes and puddings, candied confections, almond cream-filled pastries, nougat, cookies (macaroons, biscotti and qurabiya), and cakes (financiers, Esterházy torte), and other sweets and desserts. The young, developing fruit of the almond tree can be eaten whole (green almonds) when they are still green and fleshy on the outside and the inner shell has not yet hardened. The fruit is somewhat sour, but is a popular snack in parts of the Middle East, eaten dipped in salt to balance the sour taste. Also in the Middle East they are often eaten with dates. They are available only from mid-April to mid-June in the Northern Hemisphere; pickling or brining extends the fruit's shelf life. Marzipan Marzipan, a smooth, sweetened almond paste, is used in a number of elegant cakes and desserts. Princess cake is covered by marzipan (similar to fondant), as is Battenberg cake. In Sicily, sponge cake is covered with marzipan to make cassatella di sant'Agata and cassata siciliana, and marzipan is dyed and crafted into realistic fruit shapes to make frutta martorana. The Andalusian Christmas pastry pan de Cádiz is filled with marzipan and candied fruit. World cuisines In French cuisine, alternating layers of almond and hazelnut meringue are used to make the dessert dacquoise. Pithivier is one of many almond cream-filled pastries. In Germany, Easter bread called Deutsches Osterbrot is baked with raisins and almonds. In Greece almond flour is used to make amygdalopita, a glyka tapsiou dessert cake baking in a tray. Almonds are used for kourabiedes, a Greek version of the traditional quarabiya almond biscuits. A soft drink known as soumada is made from almonds in various regions. In Saudi Arabia, almonds are a typical embellishment for the rice dish kabsa. In Iran, green almonds are dipped in sea salt and eaten as snacks on street markets; they are called chaqale bâdam. Candied almonds called noghl are served alongside tea and coffee. Also, sweet almonds are used to prepare special food for babies, named harire badam. Almonds are added to some foods, cookies, and desserts, or are used to decorate foods. People in Iran consume roasted nuts for special events, for example, during New Year (Nowruz) parties. In Italy, colomba di Pasqua is a traditional Easter cake made with almonds. Bitter almonds are the base for amaretti cookies, a common dessert. Almonds are also a common choice as the nuts to include in torrone. In Morocco, almonds in the form of sweet almond paste are the main ingredient in pastry fillings, and several other desserts. Fried blanched whole almonds are also used to decorate sweet tajines such as lamb with prunes. Southwestern Berber regions of Essaouira and Souss are also known for amlou, a spread made of almond paste, argan oil, and honey. Almond paste is also mixed with toasted flour and among others, honey, olive oil or butter, anise, fennel, sesame seeds, and cinnamon to make sellou (also called zamita in Meknes or slilou in Marrakech), a sweet snack known for its long shelf life and high nutritive value. In Indian cuisine, almonds are the base ingredients of pasanda-style and Mughlai curries. Badam halva is a sweet made from almonds with added coloring. Almond flakes are added to many sweets (such as sohan barfi), and are usually visible sticking to the outer surface. Almonds form the base of various drinks which are supposed to have cooling properties. Almond sherbet or sherbet-e-badaam, is a popular summer drink. Almonds are also sold as a snack with added salt. In Israel almonds are used as a topping for tahini cookies or eaten as a snack. In Spain Marcona almonds are usually toasted in oil and lightly salted. They are used by Spanish confectioners to prepare a sweet called turrón. In Arabian cuisine, almonds are commonly used as garnishing for Mansaf. Certain natural food stores sell "bitter almonds" or "apricot kernels" labeled as such, requiring significant caution by consumers for how to prepare and eat these products. Milk Almonds can be processed into a milk substitute called almond milk; the nut's soft texture, mild flavor, and light coloring (when skinned) make for an efficient analog to dairy, and a soy-free choice for lactose intolerant people and vegans. Raw, blanched, and lightly toasted almonds work well for different production techniques, some of which are similar to that of soy milk and some of which use no heat, resulting in raw milk. Almond milk, along with almond butter and almond oil, are versatile products used in both sweet and savoury dishes. In Moroccan cuisine, sharbat billooz, a common beverage, is made by blending blanched almonds with milk, sugar and other flavorings. Flour and skins Almond flour or ground almond meal combined with sugar or honey as marzipan is often used as a gluten-free alternative to wheat flour in cooking and baking. Almonds contain polyphenols in their skins consisting of flavonols, flavan-3-ols, hydroxybenzoic acids and flavanones analogous to those of certain fruits and vegetables. These phenolic compounds and almond skin prebiotic dietary fiber have commercial interest as food additives or dietary supplements. Syrup Historically, almond syrup was an emulsion of sweet and bitter almonds, usually made with barley syrup (orgeat syrup) or in a syrup of orange flower water and sugar, often flavored with a synthetic aroma of almonds. Orgeat syrup is an important ingredient in the Mai Tai and many other Tiki drinks. Due to the cyanide found in bitter almonds, modern syrups generally are produced only from sweet almonds. Such syrup products do not contain significant levels of hydrocyanic acid, so are generally considered safe for human consumption. Oils Almonds are a rich source of oil, with 50% of kernel dry mass as fat (whole almond nutrition table). In relation to total dry mass of the kernel, almond oil contains 32% monounsaturated oleic acid (an omega-9 fatty acid), 13% linoleic acid (a polyunsaturated omega-6 essential fatty acid), and 10% saturated fatty acid (mainly as palmitic acid). Linolenic acid, a polyunsaturated omega-3 fat, is not present (table). Almond oil is a rich source of vitamin E, providing 261% of the Daily Value per 100 millilitres. When almond oil is analyzed separately and expressed per 100 grams as a reference mass, the oil provides of food energy, 8 grams of saturated fat (81% of which is palmitic acid), 70 grams of oleic acid, and 17 grams of linoleic acid (oil table). Oleum amygdalae, the fixed oil, is prepared from either sweet or bitter almonds, and is a glyceryl oleate with a slight odour and a nutty taste. It is almost insoluble in alcohol but readily soluble in chloroform or ether. Almond oil is obtained from the dried kernel of almonds. Sweet almond oil is used as a carrier oil in aromatherapy and cosmetics while bitter almond oil, containing benzaldehyde, is used as a food flavouring and in perfume. In culture The almond is highly revered in some cultures. The tree originated in the Middle East. In the Bible, the almond is mentioned ten times, beginning with Genesis 43:11, where it is described as "among the best of fruits". In Numbers 17, Levi is chosen from the other tribes of Israel by Aaron's rod, which brought forth almond flowers. The almond blossom supplied a model for the menorah which stood in the Holy Temple, "Three cups, shaped like almond blossoms, were on one branch, with a knob and a flower; and three cups, shaped like almond blossoms, were on the other … on the candlestick itself were four cups, shaped like almond blossoms, with its knobs and flowers" (Exodus 25:33–34; 37:19–20). Many Sephardic Jews give five almonds to each guest before special occasions like weddings. Similarly, Christian symbolism often uses almond branches as a symbol of the virgin birth of Jesus; paintings and icons often include almond-shaped haloes encircling the Christ Child and as a symbol of Mary. The word "luz", which appears in Genesis 30:37, sometimes translated as "hazel", may actually be derived from the Aramaic name for almond (Luz), and is translated as such in the New International Version and other versions of the Bible. The Arabic name for almond is لوز "lauz" or "lūz". In some parts of the Levant and North Africa, it is pronounced "loz", which is very close to its Aramaic origin. The Entrance of the flower (La entrada de la flor) is an event celebrated on 1 February in Torrent, Spain, in which the clavarios and members of the Confrerie of the Mother of God deliver a branch of the first-blooming almond-tree to the Virgin. See also Fruit tree forms Fruit tree propagation Fruit tree pruning List of almond dishes List of edible seeds References External links University of California Fruit and Nut Research and Information Center Benefits of Soaked Almonds Almond Edible nuts and seeds Flora of Asia Pollination management Snack foods Almond oil Crops Fruit trees Symbols of California Flora of Lebanon and Syria	6
Antisemitism (also spelled anti-semitism or anti-Semitism) is hostility to, prejudice towards, or discrimination against Jews. This sentiment is a form of racism, and a person who harbours it is called an antisemite. Though antisemitism is overwhelmingly perpetrated by non-Jews, it may occasionally be perpetrated by Jews in a phenomenon known as auto-antisemitism (i.e., self-hating Jews). Primarily, antisemitic tendencies may be motivated by negative sentiment towards Jews as a people or by negative sentiment towards Jews with regard to Judaism. In the former case, usually presented as racial antisemitism, a person's hostility is driven by the belief that Jews constitute a distinct race with inherent traits or characteristics that are repulsive or inferior to the preferred traits or characteristics within that person's society. In the latter case, known as religious antisemitism, a person's hostility is driven by their religion's perception of Jews and Judaism, typically encompassing doctrines of supersession that expect or demand Jews to turn away from Judaism and submit to the religion presenting itself as Judaism's successor faith — this is a common theme within the other Abrahamic religions. The development of racial and religious antisemitism has historically been encouraged by anti-Judaism, though the concept itself is distinct from antisemitism. There are various ways in which antisemitism is manifested, ranging in the level of severity of Jewish persecution. On the more subtle end, it consists of expressions of hatred or discrimination against individual Jews, and may or may not be accompanied by violence. On the most extreme end, it consists of pogroms or genocide, which may or may not be state-sponsored. Although the term "antisemitism" did not come into common usage until the 19th century, it is also applied to previous and later anti-Jewish incidents. Notable instances of antisemitic persecution include the Rhineland massacres in 1096; the Edict of Expulsion in 1290; the European persecution of Jews during the Black Death, between 1348 and 1351; the massacre of Spanish Jews in 1391, the crackdown of the Spanish Inquisition, and the expulsion of Jews from Spain in 1492; the Cossack massacres in Ukraine, between 1648 and 1657; various anti-Jewish pogroms in the Russian Empire, between 1821 and 1906; the Dreyfus affair, between 1894 and 1906; the Holocaust by the Axis powers during World War II; and various Soviet anti-Jewish policies. Historically, most of the world's violent antisemitic events have taken place in Christian Europe. However, since the early 20th century, there has been a sharp rise in antisemitic incidents across the Arab world, largely due to the surge in Arab antisemitic conspiracy theories, which have been cultivated to an extent under the aegis of European antisemitic conspiracy theories. In the contemporary era, a manifestation known as "new antisemitism" was identified. This concept addresses the exploitation of the Arab–Israeli conflict by a large number of concealed antisemites, who may attempt to gain traction or legitimacy for their antisemitic hoaxes by portraying themselves as criticizing the Israeli government's actions; this is distinct from people who view Israeli government policies negatively, which is not inherently antisemitic. Likewise, as the State of Israel has a Jewish-majority population, it is common for antisemitic rhetoric to be manifested in expressions of sentiments against the form or existence of Israel as a state, or sentiments against the need or right to a state for Jewish people (Anti-Zionism), particularly around Jerusalem, though this is not always the case and such expressions may sometimes be part of wider anti–Middle Eastern sentiment without an exclusively antisemitic motive. Due to the root word Semite, the term is prone to being invoked as a misnomer by those who interpret it as referring to racist hatred directed at all "Semitic people" (i.e., those who speak Semitic languages, such as Arabs, Assyrians, and Arameans). This usage is erroneous; the compound word () was first used in print in Germany in 1879 as a "scientific-sounding term" for (), and it has since been used to refer to anti-Jewish sentiment alone. Origin and usage Etymology The origin of "antisemitic" terminologies is found in the responses of Moritz Steinschneider to the views of Ernest Renan. As Alex Bein writes: "The compound anti-Semitism appears to have been used first by Steinschneider, who challenged Renan on account of his 'anti-Semitic prejudices' [i.e., his derogation of the "Semites" as a race]." Avner Falk similarly writes: "The German word was first used in 1860 by the Austrian Jewish scholar Moritz Steinschneider (1816–1907) in the phrase antisemitische Vorurteile (antisemitic prejudices). Steinschneider used this phrase to characterise the French philosopher Ernest Renan's false ideas about how 'Semitic races' were inferior to 'Aryan races. Pseudoscientific theories concerning race, civilization, and "progress" had become quite widespread in Europe in the second half of the 19th century, especially as Prussian nationalistic historian Heinrich von Treitschke did much to promote this form of racism. He coined the phrase "the Jews are our misfortune" which would later be widely used by Nazis. According to Avner Falk, Treitschke uses the term "Semitic" almost synonymously with "Jewish", in contrast to Renan's use of it to refer to a whole range of peoples, based generally on linguistic criteria. According to Jonathan M. Hess, the term was originally used by its authors to "stress the radical difference between their own 'antisemitism' and earlier forms of antagonism toward Jews and Judaism." In 1879, German journalist Wilhelm Marr published a pamphlet, (The Victory of the Jewish Spirit over the Germanic Spirit. Observed from a non-religious perspective) in which he used the word Semitismus interchangeably with the word Judentum to denote both "Jewry" (the Jews as a collective) and "Jewishness" (the quality of being Jewish, or the Jewish spirit). This use of Semitismus was followed by a coining of "Antisemitismus" which was used to indicate opposition to the Jews as a people and opposition to the Jewish spirit, which Marr interpreted as infiltrating German culture. His next pamphlet, (The Way to Victory of the Germanic Spirit over the Jewish Spirit, 1880), presents a development of Marr's ideas further and may present the first published use of the German word , "antisemitism". The pamphlet became very popular, and in the same year Marr founded the Antisemiten-Liga (League of Antisemites), apparently named to follow the "Anti-Kanzler-Liga" (Anti-Chancellor League). The league was the first German organization committed specifically to combating the alleged threat to Germany and German culture posed by the Jews and their influence and advocating their forced removal from the country. So far as can be ascertained, the word was first widely printed in 1881, when Marr published Zwanglose Antisemitische Hefte, and Wilhelm Scherer used the term Antisemiten in the January issue of Neue Freie Presse. The Jewish Encyclopedia reports, "In February 1881, a correspondent of the Allgemeine Zeitung des Judentums speaks of 'Anti-Semitism' as a designation which recently came into use ("Allg. Zeit. d. Jud." 1881, p. 138). On 19 July 1882, the editor says, 'This quite recent Anti-Semitism is hardly three years old. The word "antisemitism" was borrowed into English from German in 1881. Oxford English Dictionary editor James Murray wrote that it was not included in the first edition because "Anti-Semite and its family were then probably very new in English use, and not thought likely to be more than passing nonce-words... Would that anti-Semitism had had no more than a fleeting interest!" The related term "philosemitism" was used by 1881. Usage From the outset the term "anti-Semitism" bore special racial connotations and meant specifically prejudice against Jews. The term is confusing, for in modern usage 'Semitic' designates a language group, not a race. In this sense, the term is a misnomer, since there are many speakers of Semitic languages (e.g., Arabs, Ethiopians, and Arameans) who are not the objects of antisemitic prejudices, while there are many Jews who do not speak Hebrew, a Semitic language. Though 'antisemitism' could be construed as prejudice against people who speak other Semitic languages, this is not how the term is commonly used. The term may be spelled with or without a hyphen (antisemitism or anti-Semitism). Many scholars and institutions favor the unhyphenated form. Shmuel Almog argued, "If you use the hyphenated form, you consider the words 'Semitism', 'Semite', 'Semitic' as meaningful ... [I]n antisemitic parlance, 'Semites' really stands for Jews, just that." Emil Fackenheim supported the unhyphenated spelling, in order to "[dispel] the notion that there is an entity 'Semitism' which 'anti-Semitism' opposes." Others endorsing an unhyphenated term for the same reason include the International Holocaust Remembrance Alliance, historian Deborah Lipstadt, Padraic O'Hare, professor of Religious and Theological Studies and Director of the Center for the Study of Jewish-Christian-Muslim Relations at Merrimack College; and historians Yehuda Bauer and James Carroll. According to Carroll, who first cites O'Hare and Bauer on "the existence of something called 'Semitism, "the hyphenated word thus reflects the bipolarity that is at the heart of the problem of antisemitism". The Associated Press and its accompanying AP Stylebook adopted the unhyphenated spelling in 2021. Style guides for other news organizations such as the New York Times and Wall Street Journal later adopted this spelling as well. It has also been adopted by many Holocaust museums, such as the United States Holocaust Memorial Museum and Yad Vashem. Definition Though the general definition of antisemitism is hostility or prejudice against Jews, and, according to Olaf Blaschke, has become an "umbrella term for negative stereotypes about Jews", a number of authorities have developed more formal definitions. Holocaust scholar and City University of New York professor Helen Fein defines it as "a persisting latent structure of hostile beliefs towards Jews as a collective manifested in individuals as attitudes, and in culture as myth, ideology, folklore and imagery, and in actions—social or legal discrimination, political mobilization against the Jews, and collective or state violence—which results in and/or is designed to distance, displace, or destroy Jews as Jews." Elaborating on Fein's definition, Dietz Bering of the University of Cologne writes that, to antisemites, "Jews are not only partially but totally bad by nature, that is, their bad traits are incorrigible. Because of this bad nature: (1) Jews have to be seen not as individuals but as a collective. (2) Jews remain essentially alien in the surrounding societies. (3) Jews bring disaster on their 'host societies' or on the whole world, they are doing it secretly, therefore the anti-Semites feel obliged to unmask the conspiratorial, bad Jewish character." For Sonja Weinberg, as distinct from economic and religious anti-Judaism, antisemitism in its modern form shows conceptual innovation, a resort to 'science' to defend itself, new functional forms, and organisational differences. It was anti-liberal, racialist and nationalist. It promoted the myth that Jews conspired to 'judaise' the world; it served to consolidate social identity; it channeled dissatisfactions among victims of the capitalist system; and it was used as a conservative cultural code to fight emancipation and liberalism. Bernard Lewis defined antisemitism as a special case of prejudice, hatred, or persecution directed against people who are in some way different from the rest. According to Lewis, antisemitism is marked by two distinct features: Jews are judged according to a standard different from that applied to others, and they are accused of "cosmic evil." Thus, "it is perfectly possible to hate and even to persecute Jews without necessarily being anti-Semitic" unless this hatred or persecution displays one of the two features specific to antisemitism. There have been a number of efforts by international and governmental bodies to define antisemitism formally. The United States Department of State states that "while there is no universally accepted definition, there is a generally clear understanding of what the term encompasses." For the purposes of its 2005 Report on Global Anti-Semitism, the term was considered to mean "hatred toward Jews—individually and as a group—that can be attributed to the Jewish religion and/or ethnicity." In 2005, the European Monitoring Centre on Racism and Xenophobia (now the Fundamental Rights Agency), then an agency of the European Union, developed a more detailed working definition, which states: "Antisemitism is a certain perception of Jews, which may be expressed as hatred toward Jews. Rhetorical and physical manifestations of antisemitism are directed toward Jewish or non-Jewish individuals and/or their property, toward Jewish community institutions and religious facilities." It also adds that "such manifestations could also target the state of Israel, conceived as a Jewish collectivity," but that "criticism of Israel similar to that leveled against any other country cannot be regarded as antisemitic." It provides contemporary examples of ways in which antisemitism may manifest itself, including promoting the harming of Jews in the name of an ideology or religion; promoting negative stereotypes of Jews; holding Jews collectively responsible for the actions of an individual Jewish person or group; denying the Holocaust or accusing Jews or Israel of exaggerating it; and accusing Jews of dual loyalty or a greater allegiance to Israel than their own country. It also lists ways in which attacking Israel could be antisemitic, and states that denying the Jewish people their right to self-determination, e.g. by claiming that the existence of a state of Israel is a racist endeavor, can be a manifestation of antisemitism—as can applying double standards by requiring of Israel a behavior not expected or demanded of any other democratic nation, or holding Jews collectively responsible for the actions of the State of Israel. The definition wrong and negative perception of people with Jewish descent has been adopted by the European Parliament Working Group on Antisemitism, in 2010, a similar definition that avoided using the word wrong was adopted by the United States Department of State, in 2014, that definition was adopted in the Operational Hate Crime Guidance of the UK College of Policing and was also adopted by the Campaign Against Antisemitism. In 2016, the U.S. State Department definition was adopted by the International Holocaust Remembrance Alliance. The Working Definition of Antisemitism is among the most controversial documents related to opposition to antisemitism, and critics argue that it has been used to censor criticism of Israel. Evolution of usage In 1879, Wilhelm Marr founded the Antisemiten-Liga (Anti-Semitic League). Identification with antisemitism and as an antisemite was politically advantageous in Europe during the late 19th century. For example, Karl Lueger, the popular mayor of fin de siècle Vienna, skillfully exploited antisemitism as a way of channeling public discontent to his political advantage. In its 1910 obituary of Lueger, The New York Times notes that Lueger was "Chairman of the Christian Social Union of the Parliament and of the Anti-Semitic Union of the Diet of Lower Austria. In 1895, A. C. Cuza organized the Alliance Anti-semitique Universelle in Bucharest. In the period before World War II, when animosity towards Jews was far more commonplace, it was not uncommon for a person, an organization, or a political party to self-identify as an antisemite or antisemitic. The early Zionist pioneer Leon Pinsker, a professional physician, preferred the clinical-sounding term Judeophobia to antisemitism, which he regarded as a misnomer. The word Judeophobia first appeared in his pamphlet "Auto-Emancipation", published anonymously in German in September 1882, where it was described as an irrational fear or hatred of Jews. According to Pinsker, this irrational fear was an inherited predisposition. In the aftermath of the Kristallnacht pogrom in 1938, German propaganda minister Goebbels announced: "The German people is anti-Semitic. It has no desire to have its rights restricted or to be provoked in the future by parasites of the Jewish race." After 1945 victory of the Allies over Nazi Germany, and particularly after the full extent of the Nazi genocide against the Jews became known, the term antisemitism acquired pejorative connotations. This marked a full circle shift in usage, from an era just decades earlier when "Jew" was used as a pejorative term. Yehuda Bauer wrote in 1984: "There are no anti-Semites in the world ... Nobody says, 'I am anti-Semitic.' You cannot, after Hitler. The word has gone out of fashion." Eternalism–contextualism debate The study of antisemitism has become politically controversial because of differing interpretations of the Holocaust and the Israeli–Palestinian conflict. There are two competing views of antisemitism, eternalism, and contextualism. The eternalist view sees antisemitism as separate from other forms of racism and prejudice and an exceptionalist, transhistorical force teleologically culminating in the Holocaust. Hannah Arendt criticized this approach, writing that it provoked "the uncomfortable question: 'Why the Jews of all people?' ... with the question begging reply: Eternal hostility." Zionist thinkers and antisemites draw different conclusions from what they perceive as the eternal hatred of Jews; according to antisemites, it proves the inferiority of Jews, while for Zionists it means that Jews need their own state as a refuge. Most Zionists do not believe that antisemitism can be combatted with education or other means. The contextual approach treats antisemitism as a type of racism and focuses on the historical context in which hatred of Jews emerges. Some contextualists restrict the use of "antisemitism" to refer exclusively to the era of modern racism, treating anti-Judaism as a separate phenomenon. Historian David Engel has challenged the project to define antisemitism, arguing that it essentializes Jewish history as one of persecution and discrimination. Engel argues that the term "antisemitism" is not useful in historical analysis because it implies that there are links between anti-Jewish prejudices expressed in different contexts, without evidence of such a connection. Manifestations Antisemitism manifests itself in a variety of ways. René König mentions social antisemitism, economic antisemitism, religious antisemitism, and political antisemitism as examples. König points out that these different forms demonstrate that the "origins of anti-Semitic prejudices are rooted in different historical periods." König asserts that differences in the chronology of different antisemitic prejudices and the irregular distribution of such prejudices over different segments of the population create "serious difficulties in the definition of the different kinds of anti-Semitism." These difficulties may contribute to the existence of different taxonomies that have been developed to categorize the forms of antisemitism. The forms identified are substantially the same; it is primarily the number of forms and their definitions that differ. Bernard Lazare identifies three forms of antisemitism: Christian antisemitism, economic antisemitism, and ethnologic antisemitism. William Brustein names four categories: religious, racial, economic, and political. The Roman Catholic historian Edward Flannery distinguished four varieties of antisemitism: Political and economic antisemitism, giving as examples Cicero and Charles Lindbergh; Theological or religious antisemitism, also called "traditional antisemitism" and sometimes known as anti-Judaism; Nationalistic antisemitism, citing Voltaire and other Enlightenment thinkers, who attacked Jews for supposedly having certain characteristics, such as greed and arrogance, and for observing customs such as kashrut and Shabbat; Racial antisemitism, with its extreme form resulting in the Holocaust by the Nazis. Louis Harap separates "economic antisemitism" and merges "political" and "nationalistic" antisemitism into "ideological antisemitism". Harap also adds a category of "social antisemitism". Religious (Jew as Christ-killer), Economic (Jew as banker, usurer, money-obsessed), Social (Jew as social inferior, "pushy", vulgar, therefore excluded from personal contact), Racist (Jews as an inferior "race"), Ideological (Jews regarded as subversive or revolutionary), Cultural (Jews regarded as undermining the moral and structural fiber of civilization). Cultural antisemitism Louis Harap defines cultural antisemitism as "that species of anti-Semitism that charges the Jews with corrupting a given culture and attempting to supplant or succeeding in supplanting the preferred culture with a uniform, crude, "Jewish" culture." Similarly, Eric Kandel characterizes cultural antisemitism as being based on the idea of "Jewishness" as a "religious or cultural tradition that is acquired through learning, through distinctive traditions and education." According to Kandel, this form of antisemitism views Jews as possessing "unattractive psychological and social characteristics that are acquired through acculturation." Niewyk and Nicosia characterize cultural antisemitism as focusing on and condemning "the Jews' aloofness from the societies in which they live." An important feature of cultural antisemitism is that it considers the negative attributes of Judaism to be redeemable by education or by religious conversion. Religious antisemitism Religious antisemitism, also known as anti-Judaism, is antipathy towards Jews because of their perceived religious beliefs. In theory, antisemitism and attacks against individual Jews would stop if Jews stopped practicing Judaism or changed their public faith, especially by conversion to the official or right religion. However, in some cases, discrimination continues after conversion, as in the case of Marranos (Christianized Jews in Spain and Portugal) in the late 15th century and 16th century, who were suspected of secretly practising Judaism or Jewish customs. Although the origins of antisemitism are rooted in the Judeo-Christian conflict, other forms of antisemitism have developed in modern times. Frederick Schweitzer asserts that "most scholars ignore the Christian foundation on which the modern antisemitic edifice rests and invoke political antisemitism, cultural antisemitism, racism or racial antisemitism, economic antisemitism, and the like." William Nichols draws a distinction between religious antisemitism and modern antisemitism based on racial or ethnic grounds: "The dividing line was the possibility of effective conversion [...] a Jew ceased to be a Jew upon baptism." From the perspective of racial antisemitism, however, "the assimilated Jew was still a Jew, even after baptism.[...] From the Enlightenment onward, it is no longer possible to draw clear lines of distinction between religious and racial forms of hostility towards Jews[...] Once Jews have been emancipated and secular thinking makes its appearance, without leaving behind the old Christian hostility towards Jews, the new term antisemitism becomes almost unavoidable, even before explicitly racist doctrines appear." Some Christians such as the Catholic priest Ernest Jouin, who published the first French translation of the Protocols, combined religious and racial antisemitism, as in his statement that "From the triple viewpoint of race, of nationality, and of religion, the Jew has become the enemy of humanity." The virulent antisemitism of Édouard Drumont, one of the most widely read Catholic writers in France during the Dreyfus Affair, likewise combined religious and racial antisemitism. Drumont founded the Antisemitic League of France. Economic antisemitism The underlying premise of economic antisemitism is that Jews perform harmful economic activities or that economic activities become harmful when they are performed by Jews. Linking Jews and money underpins the most damaging and lasting antisemitic canards. Antisemites claim that Jews control the world finances, a theory promoted in the fraudulent Protocols of the Elders of Zion, and later repeated by Henry Ford and his Dearborn Independent. In the modern era, such myths continue to be spread in books such as The Secret Relationship Between Blacks and Jews published by the Nation of Islam, and on the internet. Derek Penslar writes that there are two components to the financial canards: a) Jews are savages that "are temperamentally incapable of performing honest labor" b) Jews are "leaders of a financial cabal seeking world domination" Abraham Foxman describes six facets of the financial canards: All Jews are wealthy Jews are stingy and greedy Powerful Jews control the business world Jewish religion emphasizes profit and materialism It is okay for Jews to cheat non-Jews Jews use their power to benefit "their own kind" Gerald Krefetz summarizes the myth as "[Jews] control the banks, the money supply, the economy, and businesses—of the community, of the country, of the world". Krefetz gives, as illustrations, many slurs and proverbs (in several different languages) which suggest that Jews are stingy, or greedy, or miserly, or aggressive bargainers. During the nineteenth century, Jews were described as "scurrilous, stupid, and tight-fisted", but after the Jewish Emancipation and the rise of Jews to the middle- or upper-class in Europe were portrayed as "clever, devious, and manipulative financiers out to dominate [world finances]". Léon Poliakov asserts that economic antisemitism is not a distinct form of antisemitism, but merely a manifestation of theologic antisemitism (because, without the theological causes of economic antisemitism, there would be no economic antisemitism). In opposition to this view, Derek Penslar contends that in the modern era, economic antisemitism is "distinct and nearly constant" but theological antisemitism is "often subdued". An academic study by Francesco D'Acunto, Marcel Prokopczuk, and Michael Weber showed that people who live in areas of Germany that contain the most brutal history of antisemitic persecution are more likely to be distrustful of finance in general. Therefore, they tended to invest less money in the stock market and make poor financial decisions. The study concluded, "that the persecution of minorities reduces not only the long-term wealth of the persecuted but of the persecutors as well." Racial antisemitism Racial antisemitism is prejudice against Jews as a racial/ethnic group, rather than Judaism as a religion. Racial antisemitism is the idea that the Jews are a distinct and inferior race compared to their host nations. In the late 19th century and early 20th century, it gained mainstream acceptance as part of the eugenics movement, which categorized non-Europeans as inferior. It more specifically claimed that Northern Europeans, or "Aryans", were superior. Racial antisemites saw the Jews as part of a Semitic race and emphasized their non-European origins and culture. They saw Jews as beyond redemption even if they converted to the majority religion. Racial antisemitism replaced the hatred of Judaism with the hatred of Jews as a group. In the context of the Industrial Revolution, following the Jewish Emancipation, Jews rapidly urbanized and experienced a period of greater social mobility. With the decreasing role of religion in public life tempering religious antisemitism, a combination of growing nationalism, the rise of eugenics, and resentment at the socio-economic success of the Jews led to the newer, and more virulent, racist antisemitism. According to William Nichols, religious antisemitism may be distinguished from modern antisemitism based on racial or ethnic grounds. "The dividing line was the possibility of effective conversion... a Jew ceased to be a Jew upon baptism." However, with racial antisemitism, "Now the assimilated Jew was still a Jew, even after baptism... From the Enlightenment onward, it is no longer possible to draw clear lines of distinction between religious and racial forms of hostility towards Jews... Once Jews have been emancipated and secular thinking makes its appearance, without leaving behind the old Christian hostility towards Jews, the new term antisemitism becomes almost unavoidable, even before explicitly racist doctrines appear." In the early 19th century, a number of laws enabling the emancipation of the Jews were enacted in Western European countries. The old laws restricting them to ghettos, as well as the many laws that limited their property rights, rights of worship and occupation, were rescinded. Despite this, traditional discrimination and hostility to Jews on religious grounds persisted and was supplemented by racial antisemitism, encouraged by the work of racial theorists such as Joseph Arthur de Gobineau and particularly his Essay on the Inequality of the Human Race of 1853–1855. Nationalist agendas based on ethnicity, known as ethnonationalism, usually excluded the Jews from the national community as an alien race. Allied to this were theories of Social Darwinism, which stressed a putative conflict between higher and lower races of human beings. Such theories, usually posited by northern Europeans, advocated the superiority of white Aryans to Semitic Jews. Political antisemitism William Brustein defines political antisemitism as hostility toward Jews based on the belief that Jews seek national or world power. Yisrael Gutman characterizes political antisemitism as tending to "lay responsibility on the Jews for defeats and political economic crises" while seeking to "exploit opposition and resistance to Jewish influence as elements in political party platforms." Derek J. Penslar wrote, "Political antisemitism identified the Jews as responsible for all the anxiety-provoking social forces that characterized modernity." According to Viktor Karády, political antisemitism became widespread after the legal emancipation of the Jews and sought to reverse some of the consequences of that emancipation. Conspiracy theories Holocaust denial and Jewish conspiracy theories are also considered forms of antisemitism. Zoological conspiracy theories have been propagated by Arab media and Arabic language websites, alleging a "Zionist plot" behind the use of animals to attack civilians or to conduct espionage. New antisemitism Starting in the 1990s, some scholars have advanced the concept of new antisemitism, coming simultaneously from the left, the right, and radical Islam, which tends to focus on opposition to the creation of a Jewish homeland in the State of Israel, and they argue that the language of anti-Zionism and criticism of Israel are used to attack Jews more broadly. In this view, the proponents of the new concept believe that criticisms of Israel and Zionism are often disproportionate in degree and unique in kind, and they attribute this to antisemitism. Jewish scholar Gustavo Perednik posited in 2004 that anti-Zionism in itself represents a form of discrimination against Jews, in that it singles out Jewish national aspirations as an illegitimate and racist endeavor, and "proposes actions that would result in the death of millions of Jews". It is asserted that the new antisemitism deploys traditional antisemitic motifs, including older motifs such as the blood libel. Critics of the concept view it as trivializing the meaning of antisemitism, and as exploiting antisemitism in order to silence debate and to deflect attention from legitimate criticism of the State of Israel, and, by associating anti-Zionism with antisemitism, misusing it to taint anyone opposed to Israeli actions and policies. History Many authors see the roots of modern antisemitism in both pagan antiquity and early Christianity. Jerome Chanes identifies six stages in the historical development of antisemitism: Pre-Christian anti-Judaism in ancient Greece and Rome which was primarily ethnic in nature Christian antisemitism in antiquity and the Middle Ages which was religious in nature and has extended into modern times Traditional Muslim antisemitism which was—at least, in its classical form—nuanced in that Jews were a protected class Political, social and economic antisemitism of Enlightenment and post-Enlightenment Europe which laid the groundwork for racial antisemitism Racial antisemitism that arose in the 19th century and culminated in Nazism in the 20th century Contemporary antisemitism which has been labeled by some as the New Antisemitism Chanes suggests that these six stages could be merged into three categories: "ancient antisemitism, which was primarily ethnic in nature; Christian antisemitism, which was religious; and the racial antisemitism of the nineteenth and twentieth centuries." Ancient world The first clear examples of anti-Jewish sentiment can be traced to the 3rd century BCE to Alexandria, the home to the largest Jewish diaspora community in the world at the time and where the Septuagint, a Greek translation of the Hebrew Bible, was produced. Manetho, an Egyptian priest and historian of that era, wrote scathingly of the Jews. His themes are repeated in the works of Chaeremon, Lysimachus, Poseidonius, Apollonius Molon, and in Apion and Tacitus. Agatharchides of Cnidus ridiculed the practices of the Jews and the "absurdity of their Law", making a mocking reference to how Ptolemy Lagus was able to invade Jerusalem in 320 BCE because its inhabitants were observing the Shabbat. One of the earliest anti-Jewish edicts, promulgated by Antiochus IV Epiphanes in about 170–167 BCE, sparked a revolt of the Maccabees in Judea. In view of Manetho's anti-Jewish writings, antisemitism may have originated in Egypt and been spread by "the Greek retelling of Ancient Egyptian prejudices". The ancient Jewish philosopher Philo of Alexandria describes an attack on Jews in Alexandria in 38 CE in which thousands of Jews died. The violence in Alexandria may have been caused by the Jews being portrayed as misanthropes. Tcherikover argues that the reason for hatred of Jews in the Hellenistic period was their separateness in the Greek cities, the poleis. Bohak has argued, however, that early animosity against the Jews cannot be regarded as being anti-Judaic or antisemitic unless it arose from attitudes that were held against the Jews alone, and that many Greeks showed animosity toward any group they regarded as barbarians. Statements exhibiting prejudice against Jews and their religion can be found in the works of many pagan Greek and Roman writers. Edward Flannery writes that it was the Jews' refusal to accept Greek religious and social standards that marked them out. Hecataetus of Abdera, a Greek historian of the early third century BCE, wrote that Moses "in remembrance of the exile of his people, instituted for them a misanthropic and inhospitable way of life." Manetho, an Egyptian historian, wrote that the Jews were expelled Egyptian lepers who had been taught by Moses "not to adore the gods." Edward Flannery describes antisemitism in ancient times as essentially "cultural, taking the shape of a national xenophobia played out in political settings." There are examples of Hellenistic rulers desecrating the Temple and banning Jewish religious practices, such as circumcision, Shabbat observance, the study of Jewish religious books, etc. Examples may also be found in anti-Jewish riots in Alexandria in the 3rd century BCE. The Jewish diaspora on the Nile island Elephantine, which was founded by mercenaries, experienced the destruction of its temple in 410 BCE. Relationships between the Jewish people and the occupying Roman Empire were at times antagonistic and resulted in several rebellions. According to Suetonius, the emperor Tiberius expelled from Rome Jews who had gone to live there. The 18th-century English historian Edward Gibbon identified a more tolerant period in Roman-Jewish relations beginning in about 160 CE. However, when Christianity became the state religion of the Roman Empire, the state's attitude towards the Jews gradually worsened. James Carroll asserted: "Jews accounted for 10% of the total population of the Roman Empire. By that ratio, if other factors such as pogroms and conversions had not intervened, there would be 200 million Jews in the world today, instead of something like 13 million." Persecutions during the Middle Ages In the late 6th century CE, the newly Catholicised Visigothic kingdom in Hispania issued a series of anti-Jewish edicts which forbade Jews from marrying Christians, practicing circumcision, and observing Jewish holy days. Continuing throughout the 7th century, both Visigothic kings and the Church were active in creating social aggression and towards Jews with "civic and ecclesiastic punishments", ranging between forced conversion, slavery, exile and death. From the 9th century, the medieval Islamic world classified Jews and Christians as dhimmis and allowed Jews to practice their religion more freely than they could do in medieval Christian Europe. Under Islamic rule, there was a Golden age of Jewish culture in Spain that lasted until at least the 11th century. It ended when several Muslim pogroms against Jews took place on the Iberian Peninsula, including those that occurred in Córdoba in 1011 and in Granada in 1066. Several decrees ordering the destruction of synagogues were also enacted in Egypt, Syria, Iraq and Yemen from the 11th century. In addition, Jews were forced to convert to Islam or face death in some parts of Yemen, Morocco and Baghdad several times between the 12th and 18th centuries. The Almohads, who had taken control of the Almoravids' Maghribi and Andalusian territories by 1147, were far more fundamentalist in outlook compared to their predecessors, and they treated the dhimmis harshly. Faced with the choice of either death or conversion, many Jews and Christians emigrated. Some, such as the family of Maimonides, fled east to more tolerant Muslim lands, while some others went northward to settle in the growing Christian kingdoms. In medieval Europe, Jews were persecuted with blood libels, expulsions, forced conversions and massacres. These persecutions were often justified on religious grounds and reached a first peak during the Crusades. In 1096, hundreds or thousands of Jews were killed during the First Crusade. This was the first major outbreak of anti-Jewish violence in Christian Europe outside Spain and was cited by Zionists in the 19th century as indicating the need for a state of Israel. In 1147, there were several massacres of Jews during the Second Crusade. The Shepherds' Crusades of 1251 and 1320 both involved attacks, as did the Rintfleisch massacres in 1298. Expulsions followed, such as the 1290 banishment of Jews from England, the expulsion of 100,000 Jews from France in 1394, and the 1421 expulsion of thousands of Jews from Austria. Many of the expelled Jews fled to Poland. In medieval and Renaissance Europe, a major contributor to the deepening of antisemitic sentiment and legal action among the Christian populations was the popular preaching of the zealous reform religious orders, the Franciscans (especially Bernardino of Feltre) and Dominicans (especially Vincent Ferrer), who combed Europe and promoted antisemitism through their often fiery, emotional appeals. As the Black Death epidemics devastated Europe in the mid-14th century, causing the death of a large part of the population, Jews were used as scapegoats. Rumors spread that they caused the disease by deliberately poisoning wells. Hundreds of Jewish communities were destroyed in numerous persecutions. Although Pope Clement VI tried to protect them by issuing two papal bulls in 1348, the first on 6 July and an additional one several months later, 900 Jews were burned alive in Strasbourg, where the plague had not yet affected the city. Reformation Martin Luther, an ecclesiastical reformer whose teachings inspired the Reformation, wrote antagonistically about Jews in his pamphlet On the Jews and their Lies, written in 1543. He portrays the Jews in extremely harsh terms, excoriates them and provides detailed recommendations for a pogrom against them, calling for their permanent oppression and expulsion. At one point he writes: "...we are at fault in not slaying them...", a passage that, according to historian Paul Johnson, "may be termed the first work of modern antisemitism, and a giant step forward on the road to the Holocaust." 17th century During the mid-to-late 17th century the Polish–Lithuanian Commonwealth was devastated by several conflicts, in which the Commonwealth lost over a third of its population (over 3 million people), and Jewish losses were counted in the hundreds of thousands. The first of these conflicts was the Khmelnytsky Uprising, when Bohdan Khmelnytsky's supporters massacred tens of thousands of Jews in the eastern and southern areas he controlled (today's Ukraine). The precise number of dead may never be known, but the decrease of the Jewish population during that period is estimated at 100,000 to 200,000, which also includes emigration, deaths from diseases, and captivity in the Ottoman Empire, called jasyr. European immigrants to the United States brought antisemitism to the country as early as the 17th century. Peter Stuyvesant, the Dutch governor of New Amsterdam, implemented plans to prevent Jews from settling in the city. During the Colonial Era, the American government limited the political and economic rights of Jews. It was not until the American Revolutionary War that Jews gained legal rights, including the right to vote. However, even at their peak, the restrictions on Jews in the United States were never as stringent as they had been in Europe. In the Zaydi imamate of Yemen, Jews were also singled out for discrimination in the 17th century, which culminated in the general expulsion of all Jews from places in Yemen to the arid coastal plain of Tihamah and which became known as the Mawza Exile. Enlightenment In 1744, Archduchess of Austria Maria Theresa ordered Jews out of Bohemia but soon reversed her position, on the condition that Jews pay for their readmission every ten years. This extortion was known among the Jews as malke-geld ("queen's money" in Yiddish). In 1752, she introduced the law limiting each Jewish family to one son. In 1782, Joseph II abolished most of these persecution practices in his Toleranzpatent, on the condition that Yiddish and Hebrew were eliminated from public records and that judicial autonomy was annulled. Moses Mendelssohn wrote that "Such a tolerance... is even more dangerous play in tolerance than open persecution." Voltaire According to Arnold Ages, Voltaire's "Lettres philosophiques, Dictionnaire philosophique, and Candide, to name but a few of his better known works, are saturated with comments on Jews and Judaism and the vast majority are negative". Paul H. Meyer adds: "There is no question but that Voltaire, particularly in his latter years, nursed a violent hatred of the Jews and it is equally certain that his animosity...did have a considerable impact on public opinion in France." Thirty of the 118 articles in Voltaire's Dictionnaire Philosophique concerned Jews and described them in consistently negative ways. Louis de Bonald and the Catholic Counter-Revolution The counter-revolutionary Catholic royalist Louis de Bonald stands out among the earliest figures to explicitly call for the reversal of Jewish emancipation in the wake of the French Revolution. Bonald's attacks on the Jews are likely to have influenced Napoleon's decision to limit the civil rights of Alsatian Jews. Bonald's article Sur les juifs (1806) was one of the most venomous screeds of its era and furnished a paradigm which combined anti-liberalism, a defense of a rural society, traditional Christian antisemitism, and the identification of Jews with bankers and finance capital, which would in turn influence many subsequent right-wing reactionaries such as Roger Gougenot des Mousseaux, Charles Maurras, and Édouard Drumont, nationalists such as Maurice Barrès and Paolo Orano, and antisemitic socialists such as Alphonse Toussenel. Bonald furthermore declared that the Jews were an "alien" people, a "state within a state", and should be forced to wear a distinctive mark to more easily identify and discriminate against them. Under the French Second Empire, the popular counter-revolutionary Catholic journalist Louis Veuillot propagated Bonald's arguments against the Jewish "financial aristocracy" along with vicious attacks against the Talmud and the Jews as a "deicidal people" driven by hatred to "enslave" Christians. Between 1882 and 1886 alone, French priests published twenty antisemitic books blaming France's ills on the Jews and urging the government to consign them back to the ghettos, expel them, or hang them from the gallows. Gougenot des Mousseaux's Le Juif, le judaïsme et la judaïsation des peuples chrétiens (1869) has been called a "Bible of modern antisemitism" and was translated into German by Nazi ideologue Alfred Rosenberg. Imperial Russia Thousands of Jews were slaughtered by Cossack Haidamaks in the 1768 massacre of Uman in the Kingdom of Poland. In 1772, the empress of Russia Catherine II forced the Jews into the Pale of Settlement – which was located primarily in present-day Poland, Ukraine, and Belarus – and to stay in their shtetls and forbade them from returning to the towns that they occupied before the partition of Poland. From 1804, Jews were banned from their villages and began to stream into the towns. A decree by emperor Nicholas I of Russia in 1827 conscripted Jews under 18 years of age into the cantonist schools for a 25-year military service in order to promote baptism. Policy towards Jews was liberalised somewhat under Czar Alexander II (). However, his assassination in 1881 served as a pretext for further repression such as the May Laws of 1882. Konstantin Pobedonostsev, nicknamed the "black czar" and tutor to the czarevitch, later crowned Czar Nicholas II, declared that "One-third of the Jews must die, one-third must emigrate, and one third be converted to Christianity". Islamic antisemitism in the 19th century Historian Martin Gilbert writes that it was in the 19th century that the position of Jews worsened in Muslim countries. Benny Morris writes that one symbol of Jewish degradation was the phenomenon of stone-throwing at Jews by Muslim children. Morris quotes a 19th-century traveler: "I have seen a little fellow of six years old, with a troop of fat toddlers of only three and four, teaching [them] to throw stones at a Jew, and one little urchin would, with the greatest coolness, waddle up to the man and literally spit upon his Jewish gaberdine. To all this the Jew is obliged to submit; it would be more than his life was worth to offer to strike a Mahommedan." In the middle of the 19th century, J. J. Benjamin wrote about the life of Persian Jews, describing conditions and beliefs that went back to the 16th century: "…they are obliged to live in a separate part of town… Under the pretext of their being unclean, they are treated with the greatest severity and should they enter a street, inhabited by Mussulmans, they are pelted by the boys and mobs with stones and dirt…." In Jerusalem at least, conditions for some Jews improved. Moses Montefiore, on his seventh visit in 1875, noted that fine new buildings had sprung up and, "surely we're approaching the time to witness God's hallowed promise unto Zion." Muslim and Christian Arabs participated in Purim and Passover; Arabs called the Sephardis 'Jews, sons of Arabs'; the Ulema and the Rabbis offered joint prayers for rain in time of drought. At the time of the Dreyfus trial in France, "Muslim comments usually favoured the persecuted Jew against his Christian persecutors". Secular or racial antisemitism In 1850, the German composer Richard Wagner – who has been called "the inventor of modern antisemitism" – published Das Judenthum in der Musik (roughly "Jewishness in Music") under a pseudonym in the Neue Zeitschrift für Musik. The essay began as an attack on Jewish composers, particularly Wagner's contemporaries, and rivals, Felix Mendelssohn and Giacomo Meyerbeer, but expanded to accuse Jews of being a harmful and alien element in German culture, who corrupted morals and were, in fact, parasites incapable of creating truly "German" art. The crux was the manipulation and control by the Jews of the money economy: Although originally published anonymously, when the essay was republished 19 years later, in 1869, the concept of the corrupting Jew had become so widely held that Wagner's name was affixed to it. Antisemitism can also be found in many of the Grimms' Fairy Tales by Jacob and Wilhelm Grimm, published from 1812 to 1857. It is mainly characterized by Jews being the villain of a story, such as in "The Good Bargain" ("Der gute Handel") and "The Jew Among Thorns" ("Der Jude im Dorn"). The middle 19th century saw continued official harassment of the Jews, especially in Eastern Europe under Czarist influence. For example, in 1846, 80 Jews approached the governor in Warsaw to retain the right to wear their traditional dress but were immediately rebuffed by having their hair and beards forcefully cut, at their own expense. Even such influential figures as Walt Whitman tolerated bigotry toward the Jews in America. During his time as editor of the Brooklyn Eagle (1846–1848), the newspaper published historical sketches casting Jews in a bad light. The Dreyfus Affair was an infamous antisemitic event of the late 19th century and early 20th century. Alfred Dreyfus, a Jewish artillery captain in the French Army, was accused in 1894 of passing secrets to the Germans. As a result of these charges, Dreyfus was convicted and sentenced to life imprisonment on Devil's Island. The actual spy, Marie Charles Esterhazy, was acquitted. The event caused great uproar among the French, with the public choosing sides on the issue of whether Dreyfus was actually guilty or not. Émile Zola accused the army of corrupting the French justice system. However, general consensus held that Dreyfus was guilty: 80% of the press in France condemned him. This attitude among the majority of the French population reveals the underlying antisemitism of the time period. Adolf Stoecker (1835–1909), the Lutheran court chaplain to Kaiser Wilhelm I, founded in 1878 an antisemitic, anti-liberal political party called the Christian Social Party. This party always remained small, and its support dwindled after Stoecker's death, with most of its members eventually joining larger conservative groups such as the German National People's Party. Some scholars view Karl Marx's essay "On The Jewish Question" as antisemitic, and argue that he often used antisemitic epithets in his published and private writings. These scholars argue that Marx equated Judaism with capitalism in his essay, helping to spread that idea. Some further argue that the essay influenced National Socialist, as well as Soviet and Arab antisemites. Marx himself had Jewish ancestry, and Albert Lindemann and Hyam Maccoby have suggested that he was embarrassed by it. Others argue that Marx consistently supported Prussian Jewish communities' struggles to achieve equal political rights. These scholars argue that "On the Jewish Question" is a critique of Bruno Bauer's arguments that Jews must convert to Christianity before being emancipated, and is more generally a critique of liberal rights discourses and capitalism. Iain Hamphsher-Monk wrote that "This work [On The Jewish Question] has been cited as evidence for Marx's supposed anti-semitism, but only the most superficial reading of it could sustain such an interpretation." David McLellan and Francis Wheen argue that readers should interpret On the Jewish Question in the deeper context of Marx's debates with Bruno Bauer, author of The Jewish Question, about Jewish emancipation in Germany. Wheen says that "Those critics, who see this as a foretaste of 'Mein Kampf', overlook one, essential point: in spite of the clumsy phraseology and crude stereotyping, the essay was actually written as a defense of the Jews. It was a retort to Bruno Bauer, who had argued that Jews should not be granted full civic rights and freedoms unless they were baptised as Christians". According to McLellan, Marx used the word Judentum colloquially, as meaning commerce, arguing that Germans must be emancipated from the capitalist mode of production not Judaism or Jews in particular. McLellan concludes that readers should interpret the essay's second half as "an extended pun at Bauer's expense". 20th century Between 1900 and 1924, approximately 1.75 million Jews migrated to America, the bulk from Eastern Europe escaping the pogroms. Before 1900 American Jews had always amounted to less than 1% of America's total population, but by 1930 Jews formed about 3.5%. This increase, combined with the upward social mobility of some Jews, contributed to a resurgence of antisemitism. In the first half of the 20th century, in the US, Jews were discriminated against in employment, access to residential and resort areas, membership in clubs and organizations, and in tightened quotas on Jewish enrolment and teaching positions in colleges and universities. The lynching of Leo Frank by a mob of prominent citizens in Marietta, Georgia, in 1915 turned the spotlight on antisemitism in the United States. The case was also used to build support for the renewal of the Ku Klux Klan which had been inactive since 1870. At the beginning of the 20th century, the Beilis Trial in Russia represented modern incidents of blood-libels in Europe. During the Russian Civil War, close to 50,000 Jews were killed in pogroms. Antisemitism in America reached its peak during the interwar period. The pioneer automobile manufacturer Henry Ford propagated antisemitic ideas in his newspaper The Dearborn Independent (published by Ford from 1919 to 1927). The radio speeches of Father Coughlin in the late 1930s attacked Franklin D. Roosevelt's New Deal and promoted the notion of a Jewish financial conspiracy. Some prominent politicians shared such views: Louis T. McFadden, Chairman of the United States House Committee on Banking and Currency, blamed Jews for Roosevelt's decision to abandon the gold standard, and claimed that "in the United States today, the Gentiles have the slips of paper while the Jews have the lawful money". In Germany, shortly after Adolf Hitler and the Nazi Party came to power in 1933, the government instituted repressive legislation which denied Jews basic civil rights. In September 1935, the Nuremberg Laws prohibited sexual relations and marriages between "Aryans" and Jews as Rassenschande ("race disgrace") and stripped all German Jews, even quarter- and half-Jews, of their citizenship (their official title became "subjects of the state"). It instituted a pogrom on the night of 9–10 November 1938, dubbed Kristallnacht, in which Jews were killed, their property destroyed and their synagogues torched. Antisemitic laws, agitation and propaganda were extended to German-occupied Europe in the wake of conquest, often building on local antisemitic traditions. In 1940, the famous aviator Charles Lindbergh and many prominent Americans led the America First Committee in opposing any involvement in a European war. Lindbergh alleged that Jews were pushing America to go to war against Germany. Lindbergh adamantly denied being antisemitic, and yet he refers numerous times in his private writings – his letters and diary – to Jewish control of the media being used to pressure the U.S. to get involved in the European war. In one diary entry in November 1938, he responded to Kristallnacht by writing "I do not understand these riots on the part of the Germans. ... They have undoubtedly had a difficult Jewish problem, but why is it necessary to handle it so unreasonably?", acknowledgement on Lindbergh's part that he agreed with the Nazis that Germany had a "Jewish problem". An article by Jonathan Marwil in Antisemitism, A Historical Encyclopedia of Prejudice and Persecution claims that "no one who ever knew Lindbergh thought him antisemitic" and that claims of his antisemitism were solely tied to the remarks he made in that one speech. In the east the Third Reich forced Jews into ghettos in Warsaw, in Kraków, in Lvov, in Lublin and in Radom. After the beginning of the war between Nazi Germany and the Soviet Union in 1941, a campaign of mass murder, conducted by the Einsatzgruppen, culminated from 1942 to 1945 in systematic genocide: the Holocaust. Eleven million Jews were targeted for extermination by the Nazis, and some six million were eventually killed. Contemporary antisemitism Post-WWII antisemitism There have continued to be antisemitic incidents since WWII, some of which had been state-sponsored. In the Soviet Union, antisemitism has been used as an instrument for settling personal conflicts starting with the conflict between Joseph Stalin and Leon Trotsky and continuing through numerous conspiracy theories spread by official propaganda. Antisemitism in the USSR reached new heights after 1948 during the campaign against the "rootless cosmopolitan" (euphemism for "Jew") in which numerous Yiddish-language poets, writers, painters, and sculptors were killed or arrested. This culminated in the so-called Doctors' Plot in 1952. Similar antisemitic propaganda in Poland resulted in the flight of Polish Jewish survivors from the country. After the war, the Kielce pogrom and the "March 1968 events" in communist Poland represented further incidents of antisemitism in Europe. The anti-Jewish violence in postwar Poland had a common theme of blood libel rumours. 21st-century European antisemitism Physical assaults against Jews in Europe have included beatings, stabbings, and other violence, which increased markedly, sometimes resulting in serious injury and death. A 2015 report by the US State Department on religious freedom declared that "European anti-Israel sentiment crossed the line into anti-Semitism." This rise in antisemitic attacks is associated with both Muslim antisemitism and the rise of far-right political parties as a result of the economic crisis of 2008. This rise in the support for far-right ideas in western and eastern Europe has resulted in the increase of antisemitic acts, mostly attacks on Jewish memorials, synagogues and cemeteries but also a number of physical attacks against Jews. In Eastern Europe the dissolution of the Soviet Union and the instability of the new states brought the rise of nationalist movements and the accusation against Jews for the economic crisis, taking over the local economy and bribing the government, along with traditional and religious motives for antisemitism such as blood libels. Writing on the rhetoric surrounding the 2022 Russian invasion of Ukraine, Jason Stanley relates these perceptions to broader historical narratives: "the dominant version of antisemitism alive in parts of eastern Europe today is that Jews employ the Holocaust to seize the victimhood narrative from the 'real' victims of the Nazis, who are Russian Christians (or other non-Jewish eastern Europeans)". He calls out the "myths of contemporary eastern European antisemitism – that a global cabal of Jews were (and are) the real agents of violence against Russian Christians and the real victims of the Nazis were not the Jews, but rather this group." Most of the antisemitic incidents in Eastern Europe are against Jewish cemeteries and buildings (community centers and synagogues). Nevertheless, there were several violent attacks against Jews in Moscow in 2006 when a neo-Nazi stabbed 9 people at the Bolshaya Bronnaya Synagogue, the failed bomb attack on the same synagogue in 1999, the threats against Jewish pilgrims in Uman, Ukraine and the attack against a menorah by extremist Christian organization in Moldova in 2009. According to Paul Johnson, antisemitic policies are a sign of a state which is poorly governed. While no European state currently has such policies, the Economist Intelligence Unit notes the rise in political uncertainty, notably populism and nationalism, as something that is particularly alarming for Jews. 21st-century Arab antisemitism Robert Bernstein, founder of Human Rights Watch, says that antisemitism is "deeply ingrained and institutionalized" in "Arab nations in modern times". In a 2011 survey by the Pew Research Center, all of the Muslim-majority Middle Eastern countries polled held significantly negative opinions of Jews. In the questionnaire, only 2% of Egyptians, 3% of Lebanese Muslims, and 2% of Jordanians reported having a positive view of Jews. Muslim-majority countries outside the Middle East similarly held markedly negative views of Jews, with 4% of Turks and 9% of Indonesians viewing Jews favorably. According to a 2011 exhibition at the United States Holocaust Memorial Museum in Washington, United States, some of the dialogue from Middle East media and commentators about Jews bear a striking resemblance to Nazi propaganda. According to Josef Joffe of Newsweek, "anti-Semitism—the real stuff, not just bad-mouthing particular Israeli policies—is as much part of Arab life today as the hijab or the hookah. Whereas this darkest of creeds is no longer tolerated in polite society in the West, in the Arab world, Jew hatred remains culturally endemic." Muslim clerics in the Middle East have frequently referred to Jews as descendants of apes and pigs, which are conventional epithets for Jews and Christians. According to professor Robert Wistrich, director of the Vidal Sassoon International Center for the Study of Antisemitism (SICSA), the calls for the destruction of Israel by Iran or by Hamas, Hezbollah, Islamic Jihad, or the Muslim Brotherhood, represent a contemporary mode of genocidal antisemitism. Black Hebrew Israelite antisemitism In 2022, the American Jewish Committee stated that the Black Hebrew Israelite claim that "we are the real Jews" is a "troubling anti-Semitic trope with dangerous potential". Black Hebrew Israelite followers have sought out and attacked Jewish people in the United States on more than one occasion. Between 2019 and 2022, individuals motivated by Black Hebrew Israelitism committed five religiously motivated murders. Black Hebrew Israelites believe that Jewish people are "imposters", who have "stolen" Black Americans' true racial and religious identity. Black Hebrew Israelites promote the Khazar theory about Ashkenazi Jewish origins. In 2019, 4% of African-Americans self-identified as being Black Hebrew Israelites. Causes Antisemitism has been explained in terms of racism, xenophobia, projected guilt, displaced aggression, and the search for a scapegoat. Some explanations assign partial blame to the perception of Jewish people as unsociable. Such a perception may have arisen by many Jews having strictly kept to their own communities, with their own practices and laws. It has also been suggested that parts of antisemitism arose from a perception of Jewish people as greedy (as often used in stereotypes of Jews), and this perception has probably evolved in Europe during medieval times where a large portion of money lending was operated by Jews. Factors contributing to this situation included that Jews were restricted from other professions, while the Christian Church declared for their followers that money lending constituted immoral "usury". Prevention through education Education plays an important role in addressing and overcoming prejudice and countering social discrimination. However, education is not only about challenging the conditions of intolerance and ignorance in which antisemitism manifests itself; it is also about building a sense of global citizenship and solidarity, respect for, and enjoyment of diversity and the ability to live peacefully together as active, democratic citizens. Education equips learners with the knowledge to identify antisemitism and biased or prejudiced messages and raises awareness about the forms, manifestations, and impact of antisemitism faced by Jews and Jewish communities. Geographical variation A March 2008 report by the U.S. State Department found that there was an increase in antisemitism across the world, and that both old and new expressions of antisemitism persist. A 2012 report by the U.S. Bureau of Democracy, Human Rights and Labor also noted a continued global increase in antisemitism, and found that Holocaust denial and opposition to Israeli policy at times was used to promote or justify blatant antisemitism. In 2014, the Anti-Defamation League conducted a study titled Global 100: An Index of Anti-Semitism, which also reported high antisemitism figures around the world and, among other findings, that as many as "27% of people who have never met a Jew nevertheless harbor strong prejudices against him". See also 1968 Polish political crisis Anti-antisemitism Anti-Jewish violence in Eastern Europe, 1944–1946 Anti-Middle Eastern sentiment Anti-Semite and Jew Antisemitism around the world Antisemitism in the anti-globalization movement Antisemitism in the Arab world Antisemitism in Japan Antisemitism in the United States History of antisemitism in the United States Criticism of Judaism Farhud, 1941 Baghdad pogrom Host desecration Jacob Barnet affair Jewish deicide [Christ killers] Judeo-Masonic conspiracy theory Martyrdom in Judaism Universities and Antisemitism Secondary antisemitism Stab-in-the-back myth Timeline of antisemitism Xenophobia Notes References Citations Sources Deutsch, Gotthard, Anti-Semitism Jewish Encyclopedia vol. 1, pp. 641–9. New York, Funk & Wagnalls, 1901. At Internet Archive Poliakov, Léon. The History of Anti-Semitism, Volume 1: From the Time of Christ to the Court Jews, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 2: From Mohammad to the Marranos, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 3: From Voltaire to Wagner, University of Pennsylvania Press: 2003 Poliakov, Léon. The History of Anti-Semitism, Volume 4: Suicidal Europe 1870–1933, University of Pennsylvania Press: 2003 Poliakov, Léon (1997). "Anti-Semitism". Encyclopaedia Judaica (CD-ROM Edition Version 1.0). Ed. Cecil Roth. Keter Publishing House. Tausch, Arno (2018). The Return of Religious Antisemitism? The Evidence from World Values Survey Data (17 November 2018). Available at SSRN Tausch, Arno (2015). Islamism and Antisemitism. Preliminary Evidence on Their Relationship from Cross-National Opinion Data (14 August 2015). Available at SSRN or Islamism and Antisemitism. Preliminary Evidence on Their Relationship from Cross-National Opinion Data Tausch, Arno (2014). The New Global Antisemitism: Implications from the Recent ADL-100 Data (14 January 2015). Middle East Review of International Affairs, Vol. 18, No. 3 (Fall 2014). Available at SSRN or The New Global Antisemitism: Implications from the Recent ADL-100 Data Attribution Further reading Brustein, William I., and Ryan D. King. "Anti-semitism in Europe before the Holocaust." International Political Science Review 25.1 (2004): 35–53. online Carr, Steven Alan. Hollywood and anti-Semitism: A cultural history up to World War II, Cambridge University Press 2001. Cohn, Norman. Warrant for Genocide, Eyre & Spottiswoode 1967; Serif, 1996. Fischer, Klaus P. The History of an Obsession: German Judeophobia and the Holocaust, The Continuum Publishing Company, 1998. Freudmann, Lillian C. Antisemitism in the New Testament, University Press of America, 1994. Gerber, Jane S. (1986). "Anti-Semitism and the Muslim World". In History and Hate: The Dimensions of Anti-Semitism, ed. David Berger. Jewish Publications Society. Goldberg, Sol; Ury, Scott; Weiser, Kalman (eds.). Key Concepts in the Study of Antisemitism (Palgrave Macmillan, 2021) online review Hanebrink, Paul. A Specter Haunting Europe: The Myth of Judeo-Bolshevism, Harvard University Press, 2018. . Hilberg, Raul. The Destruction of the European Jews. Holmes & Meier, 1985. 3 volumes. Isser, Natalie. Antisemitism during the French Second Empire (1991) McKain, Mark. Anti-Semitism: At Issue, Greenhaven Press, 2005. Marcus, Kenneth L. The Definition of Anti-Semitism, 2015, Oxford University Press Michael, Robert and Philip Rosen. Dictionary of Antisemitism , The Scarecrow Press, Inc., 2007 Michael, Robert. Holy Hatred: Christianity, Antisemitism, and the Holocaust Nirenberg, David. Anti-Judaism: The Western Tradition (New York: W. W. Norton & Company, 2013) 610 pp. Roth, Philip. The Plot Against America, 2004 Selzer, Michael (ed.). "Kike!" : A Documentary History of Anti-Semitism in America, New York 1972. Small, Charles Asher ed. The Yale Papers: Antisemitism In Comparative Perspective (Institute For the Study of Global Antisemitism and Policy, 2015). online , scholarly studies. Stav, Arieh (1999). Peace: The Arabian Caricature – A Study of Anti-semitic Imagery. Gefen Publishing House. . Steinweis, Alan E. Studying the Jew: Scholarly Antisemitism in Nazi Germany. Harvard University Press, 2006. . Stillman, Norman. The Jews of Arab Lands: A History and Source Book. (Philadelphia: Jewish Publication Society of America. 1979). Stillman, N.A. (2006). "Yahud". Encyclopaedia of Islam. Eds.: P.J. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel and W.P. Heinrichs. Brill. Brill Online , United States Department of State, 2008. Retrieved 25 November 2010. See HTML version . Vital, David. People Apart: The Jews in Europe, 1789-1939 (1999); 930pp highly detailed Bibliographies, calendars, etc. Jewish Journal of Greater Los Angeles, "Experts explore effects of Ahmadinejad anti-Semitism", 9 March 2007 Lazare, Bernard, Antisemitism: Its History and Causes Anti-Defamation League Arab Antisemitism Why the Jews? A perspective on causes of anti-Semitism Coordination Forum for Countering Antisemitism (with up to date calendar of antisemitism today) Annotated bibliography of anti-Semitism hosted by the Hebrew University of Jerusalem's Center for the Study of Antisemitism (SICSA) Council of Europe, ECRI Country-by-Country Reports Porat, Dina. "What makes an anti-Semite?", Haaretz, 27 January 2007. Retrieved 24 November 2010. Yehoshua, A.B., An Attempt to Identify the Root Cause of Antisemitism , Azure , Spring 2008. Antisemitism in modern Ukraine Antisemitism and Special Relativity External links Prejudice and discrimination by type Racism Orientalism	10
The economy of Azerbaijan has completed its post-Soviet transition into a major oil-based economy (with the completion of the Baku-Tbilisi-Ceyhan Pipeline), from one where the state played the major role. The transition to oil production led to remarkable growth figures as projects came online; reaching 26.4% in 2005 (second highest GDP growth in the world in 2005 only to Equatorial Guinea) and 34.6% in 2006 (world highest) before subsiding to 10.8% and 9.3% in 2008 and 2009 respectively. The real GDP growth rate for 2011 was expected at 3.7% but had dropped to 0.1%. Large oil reserves are a major contributor to Azerbaijan's economy. The national currency, the Azerbaijani manat, was stable in 2000, depreciating 3.8% against the dollar. The budget deficit equaled 1.3% of GDP in 2000. Progress on economic reform has generally lagged behind macroeconomic stabilization. The government has undertaken regulatory reforms in some areas, including the substantial opening of trade policy, but inefficient public administration in which commercial and regulatory interests are commingled limit the impact of these reforms. The government has largely completed privatization of agricultural lands and small and medium-sized enterprises. In August 2000, the government launched a second-stage privatization program, in which many large state enterprises will be privatized. Since 2001, the economic activity in the country is regulated by the Ministry of Economy of Azerbaijan Republic. Economic history of Azerbaijan Modern era Throughout the Soviet period, Azerbaijan had always been more developed industrially than Armenia and Georgia, two neighboring Transcaucasia countries but also less diversified, as a result of slow investment in the non-oil sector. In this context, Azerbaijan had relevance in the Soviet economy. Also, in the Soviet Era, Azerbaijan was known for its production of cotton, grain, and fruits. With a history of industrial development of more than 100 years, Azerbaijan proved to be a leading nation in the Southern Caucasus throughout the turmoil of the Soviet Union collapse in the early 1990s until nowadays. Republic era Oil remains the most prominent product of Azerbaijan's economy with cotton, natural gas and agriculture products contributing to its economic growth over the last five years. More than $60 billion was invested into Azerbaijan's oil by major international oil companies in AIOC consortium operated by BP. Oil production under the first of these PSAs, with the Azerbaijan International Operating Company, began in November 1997 and now is about 500,000 barrels per day. People visit petroleum spas (or "oil spas") to bathe in the local crude in Naftalan. A leading caviar producer and exporter in the past, Azerbaijan's fishing industry today is concentrated on the dwindling stocks of sturgeon and beluga in the Caspian Sea. Azerbaijan shares all the problems of the former Soviet republics in making the transition from a command to a market economy, but its energy resources brighten its long-term prospects. Azerbaijan has begun making progress on economic reform, and old economic ties and structures are slowly being replaced. An obstacle to economic progress, including stepped up foreign investment, is the continuing conflict with Armenia over the Nagorno-Karabakh region. In 1992, Azerbaijan became member of the Economic Cooperation Organization. In 2002, the Azerbaijani merchant marine had 54 ships. In March 2001, Azerbaijan concluded a natural gas agreement with Turkey, providing a future export market for Azerbaijan. Azerbaijan has concluded 21 production-sharing agreements with various oil companies. An export pipeline that transports Caspian oil to the Mediterranean from Baku through Tbilisi, Georgia to Ceyhan, Turkey (the Baku-Tbilisi-Ceyhan Pipeline) became operational in 2006. The pipeline is expected to generate as much as $160 billion in revenues for the country over the next 30 years. The recent high price of oil is highly beneficial to Azerbaijan's economy as the nation is in the midst of an oil boom. Eastern Caspian producers in Kazakhstan also have expressed interest in accessing this pipeline to transport a portion of their production. In 2010, Azerbaijan entered into the top eight biggest oil suppliers to EU countries with €9.46 billion. In 2011, the amount of foreign investments in Azerbaijan was $20 billion, a 61% increase from 2010. According to Minister of Economic Development of Azerbaijan, Shahin Mustafayev, in 2011, "$15.7 billion was invested in the non-oil sector, while the restin the oil sector". In 2012, because of its economic performance after the Soviet breakup, Azerbaijan was predicted to become "Tiger of Caucasus". In 2012, Globalization and World Cities Research Network study ranked Baku as a Gamma-level global city. In 2015, Turkey and Azerbaijan agreed to boost mutual trade to US$15 billion by 2023. Macro-economic trend The following is a chart of trend of gross domestic product of Azerbaijan at market prices with figures in USD. For purchasing power parity comparisons, the US dollar was exchanged at 1,565.88 Manats only. Currently, the new Manat is in use, with an exchange rate of about 1 manat = $1.10. Mean graduate pay was $5.76 per man-hour in 2010. The following table shows the main economic indicators in 1980–2017. Source: IMF For more than a century the backbone of the Azerbaijani economy has been petroleum, which represented 50 percent of Azerbaijan's GDP in 2005, and is projected to double to almost 125 percent of GDP in 2007. Now that Western oil companies are able to tap deepwater oilfields untouched by the Soviets because of poor technology, Azerbaijan is considered one of the most important areas in the world for oil exploration and development. Proven oil reserves in the Caspian Basin, which Azerbaijan shares with Russia, Kazakhstan, Iran, and Turkmenistan, are comparable in size to the North Sea, although exploration is still in the early stages. Sectors of the economy Agriculture Azerbaijan has the largest agricultural basin in the region. About 54.9 percent of Azerbaijan is agricultural lands. At the beginning of 2007 there were of utilized agricultural area. In the same year the total wood resources counted . Azerbaijan's agricultural scientific research institutes are focused on meadows and pastures, horticulture and subtropical crops, leaf vegetables, viticulture and wine-making, cotton growing and medicinal plants. In some lands it is profitable to grow grain, potatoes, sugar beets, cotton and tobacco. Livestock, dairy products, and wine and spirits are also important farm products. The Caspian fishing industry is concentrated on the dwindling stocks of sturgeon and beluga. Some portions of most products that were previously imported from abroad have begun to be produced locally (among them are Coca-Cola by Coca-Cola Bottlers LTD, beer by Baki-Kastel, parquet by Nehir and oil pipes by EUPEC Pipe Coating Azerbaijan). A new program which is prepared by the European Union is aimed to support the economic diversification of Azerbaijan. Program is considered for southern region Lankaran which has the lowest economic indicator and the lowest income per capita, as well as, the lowest level of investment, but at the same time, high potential for the production of garden products in high quality. The program will be focused on the development of the region at the local and international levels. Azerbaijan produced in 2018: 2.0 million tons of wheat; 916 thousand tons of barley; 898 thousand tons of potato; 609 thousand tons of tomato; 307 thousand tons of watermelon; 277 thousand tons of sugar beet; 277 thousand tons of apple; 247 thousand tons of maize; 235 thousand tons of onion; 233 thousand tons of cotton; 223 thousand tons of cucumber; 167 thousand tons of grape; 160 thousand tons of persimmon (5th largest world producer); 108 thousand tons of cabbage; In addition to smaller productions of other agricultural products, like melon (94 thousand tons), pear (52 thousand tons) and apricot (28 thousand tons). Manufacturing In 2007, mining and hydrocarbon industries accounted for well over 95 percent of the Azerbaijani economy. Diversification of the economy into manufacturing industries remains a long-term issue. As of late 2000s, the defense industry of Azerbaijan has emerged as an autonomous entity with a growing defense production capability. The ministry is cooperating with the defense sectors of Ukraine, Belarus and Pakistan. Along with other contracts, Azerbaijani defence industries and Turkish companies, Azerbaijan will produce 40 mm revolver grenade launchers, 107 mm and 122 mm MLRS systems, Cobra 4×4 vehicles and joint modernization of BTR vehicles in Baku. Services In 2023, there were 1,708 registered companies in the Services sector. Financial and business services The GDP growth rates observed in Azerbaijan during the last years made the country one of the fastest growing economies in the world. But the banking sector of Azerbaijan has yet to tap the vast growth potential that should be achievable due to the continuation of the high economic growth. For this reason the banking sector remains small in relation to the size of the Azerbaijani economy. Since 2002, important stages of restructuring of the banking system have started to be carried out. Taking into consideration the entry of big oil revenues in the country, as a logical result of successful oil strategy, and in this base, as the banks were ready to an effective transfer of their financial resources to the strategic goals, development strategy was made for 2002–2005. By 1 April 2010, 47 banks, 631 bank branches function in Azerbaijan. One of the banks was founded with the participation of state capital, 23 of foreign capital. To the same date, 98 non-bank credit organizations operate in the republic along with banks. Growth of real money incomes of population, development of trust in the bank system, improving the legal bases of protection of interests of creditors and depositors, in particular launch of 'Deposits Insurance Fund' were the criteria characterizing rapid growth of deposits of population. As of 1 April 2010, bank deposits of population were equal to 2,4 billion AZN. 33,3% of them were long-term deposits (higher than a year). As of 1 April 2010, bank credits to customers is 8.5 bn AZN, which makes 70.5% of bank assets. Special weight of private sector in structure of credit investments is higher than 82% (7 bn AZN). Telecommunications In the 21st century, a new oil and gas boom helped to improve the situation in Azerbaijan's science and technology sectors, and the government launched a campaign aimed at modernization and innovation. The government estimates that profits from the information technology and communication industry will grow and become comparable with those from oil production. Azerbaijan has a large and steadily growing Internet sector, mostly uninfluenced by the financial crisis of 2007–2008; rapid growth is forecast for at least five more years. The country has also been making progress in developing its telecoms sector. The Ministry of Communications & Information Technologies (MCIT), as well as being an operator through its role in Aztelekom, is both a policy-maker and regulator. Public payphones are available for local calls and require the purchase of a token from the telephone exchange or some shops and kiosks. Tokens allow a call of indefinite duration. As of 2009, there were 1,397,000 main telephone lines and 1,485,000 internet users. There are five GSM providers: Azercell, Bakcell, Azerfon (Nar Mobile), Aztrank, Catel mobile network operators and one CDMA. Tourism Tourism is an important part of the economy of Azerbaijan. The country was a well-known tourist spot in the 1980s. However, the fall of the Soviet Union, and the First Nagorno-Karabakh War during the 1988–1994 period, damaged the tourist industry and the image of Azerbaijan as a tourist destination. It was not until the 2000s that the tourism industry began to recover, and the country has since experienced a high rate of growth in the number of tourist visits and overnight stays. In recent years, Azerbaijan has also become a popular destination for religious, spa, and health care tourism. During winter, the Shahdag Winter Complex offers skiing. The government of Azerbaijan has set the development of Azerbaijan as an elite tourist destination a top priority. It is a national strategy to make tourism a major, if not the single largest, contributor to the Azerbaijani economy. These activities are regulated by the State Tourism Agency and the Ministry of Culture. The Formula One Grand Prix is held in Baku, the capital city and has been held here for years. Currency system The Azerbaijani manat is the currency of Azerbaijani, denominated as the manat, subdivided into 100 qapik. The manat is issued by the Central Bank of Azerbaijan, the monetary authority of Azerbaijan. The ISO 4217 abbreviation is AZN. The Latinised symbol is (). The manat is held in a floating exchange-rate system managed primarily against the US dollar. The rate of exchange (Azerbaijani manat per US$1) for 28 January 2016, was AZN 1.60. There is a complex relationship between Azerbaijan's balance of trade, inflation, measured by the consumer price index and the value of its currency. Despite allowing the value of the manat to "float", Azerbaijan's central bank has decisive ability to control its value with relationship to other currencies. Infrastructure Energy Two-thirds of Azerbaijan is rich in oil and natural gas. The region of the Lesser Caucasus accounts for most of the country's gold, silver, iron, copper, titanium, chromium, manganese, cobalt, molybdenum, complex ore and antimony. In September 1994, a 30-year contract was signed between the State Oil Company of Azerbaijan Republic (SOCAR) and 13 oil companies, among them Amoco, BP, ExxonMobil, Lukoil and Statoil. As Western oil companies are able to tap deepwater oilfields untouched by the Soviet exploitation, Azerbaijan is considered one of the most important spots in the world for oil exploration and development. Meanwhile, the State Oil Fund of Azerbaijan was established as an extra-budgetary fund to ensure the macroeconomic stability, transparency in the management of oil revenue, and the safeguarding of resources for future generations. Azeriqaz, a sub-company of SOCAR, intends to ensure full gasification of the country by 2021. Transportation The convenient location of Azerbaijan on the crossroad of major international traffic arteries, such as the Silk Road and the south–north corridor, highlights the strategic importance of the transportation sector for the country's economy. The transport sector in the country includes roads, railways, aviation, and maritime transport. Azerbaijan is also an important economic hub in the transportation of raw materials. The Baku-Tbilisi-Ceyhan pipeline (BTC) became operational in May 2006 and extends more than 1,774 kilometers through the territories of Azerbaijan, Georgia and Turkey. The BTC is designed to transport up to 50 million tons of crude oil annually and carries oil from the Caspian Sea oilfields to global markets. The South Caucasus Pipeline, also stretching through the territory of Azerbaijan, Georgia and Turkey, became operational at the end of 2006 and offers additional gas supplies to the European market from the Shah Deniz gas field. Shah Deniz is expected to produce up to 296 billion cubic meters of natural gas per year. Azerbaijan also plays a major role in the EU-sponsored Silk Road Project. In 2002, the Azerbaijani government established the Ministry of Transport with a broad range of policy and regulatory functions. In the same year, the country became a member of the Vienna Convention on Road Traffic. The highest priority being; upgrading the transport network and transforming transportation services into one of the key comparative advantages of the country, as this would be highly conducive to the development of other sectors of the economy. In 2012, the construction of Kars–Tbilisi–Baku railway expected to provide transportation between Asia and Europe through connecting the railways of China and Kazakhstan in the east with Turkey's Marmaray to the European railway system in the west. Broad gauge railways in 2010 stretched for and electrified railways numbered . By 2010, there were 35 airports and one heliport. Regulation Single window system shares needed information through a single gateway with all organizations serving in trade field, as well as abolishes useless processes and raises the effectiveness of cooperation among different parties. 73 economies implement single window system in the world. Azerbaijan started to implement this system in 2009. It implemented an E-Government portal as well. A single-window system was established by a decree of the Azerbaijani President issued in 2007, 30 April, in order to simplify export-import procedures, innovate customs services, and improve the trade environment. According to the decree, Ministry of Justice, Ministry of Economic Development, Ministry of Taxes, Ministry of Labor and Social Protection, State Social Protection Fund, and State Statistics Committee should present a proposal on the organization of entrepreneurial activities by single registration body based on single window principle. The president appointed the State Customs Committee as the leading body of controlling goods and transportation passing through the borders of the country in 2008. A "single authority principle" requires customs officials to be more responsible in dealing with all types of border control operations for other authorities. The Netherlands and Sweden were the countries of which practice studied. A "single system" works on and then shares standardized information accumulated from traders to all entities taking part in international trade. The practice of US was explored in this phase. An "automated system" provides a single electronic statement to responsible agencies submitted by traders to be worked on and confirmed, and after that, these authorities send electronic confirmations and announcements. In this case, practice of Mauritius and Singapore was studied. The Customs Committee formed a commission to realize the new system. Ministry of Agriculture, Ministry of Healthcare, Ministry of Internal Affairs, Ministry of Taxes, Ministry of Transportation, Central Bank, State Road Police, State Committee for Standardization, Metrology and Patents, State Maritime Administration were selected as important agencies to implement single window system along with the State Customs Committee. The government supported Customs Committee in preparing its staff to deal with the new system by improving recruitment of local customs offices, providing with software and hardware upgrades for the system. Azerbaijani government supports financially single window system. In the first phase, the government realized customs clearance system on the process of border crossing to country beginning from 1 January 2009. This system was free to all users. Then it was expanded to Baku and Sumgayit in 2011. Customs code of the Republic of Azerbaijan was amended based on the inclusion of the article on single window system which became operative on 1 January 2012. After this amendment, all of Azerbaijan's 29 customs checkpoints started to implement new single window system. According to the Presidential Decree (11 November 2008), the "single window" principle started to be applied from 1 January 2009 on the inspection of goods and transportation at the border checkpoints. Customs Committee established a commission working on the implementation of "single window" principle in customs agencies on 18 November 2008 based on the Presidential Decree of 11 November 2008. Technological scheme determining the sequence of issuance of "permit" certificates was approved by the Customs Committee on 22 December 2009. Scheme provided customs officers to issue "permit" certificates at border checkpoints to vehicles, which perform customs, veterinary, photo-sanitary and sanitary quarantine control activities and international automobile transportation in accordance with legislation. The State Migration Service issues appropriate permits for foreigners and stateless persons coming to Azerbaijan to live and work on legal grounds, simplifying the procedure of their registration at the place of residence, and ensuring transparency in these processes. The "single window" principle has been applied on migration management processes starting from 1 July 2009 according to the Decree. Business environment As of October 2014, Azerbaijan holds the highest foreign investment per capita among the Commonwealth of Independent States (CIS) countries. Germany, for example, has invested approximately $760 million into the Azerbaijani economy, and approximately 177 German companies operate within Azerbaijan. Since gaining its independence, companies have invested $174 billion into Azerbaijan. Foreign investment accounts for around half of that amount. In 2008, Azerbaijan was cited as the top reformer by the World Bank's Doing Business report: According to World Bank's Doing Business report 2019, Azerbaijan improved its position in the Ease of doing business rank from 57 to 25, as well as ranked 4th among the top 10 improvers. Implementing a record number of reforms mainly involving institutional changes have made it easier to do business in Azerbaijan in 2017–2018 period, as a result time and cost to get construction permit reduced significantly (time by 80 days and cost by 12.563 AZN), process of connecting electricity grid rationalized, as well as getting credit simplified. Poverty Other economic indicators Data from CIA World Factbook unless noted otherwise Investment (gross fixed) 17% of GDP (2011 est.) Household income or consumption by percentage share lowest 10%: 3.4% highest 10%: 27.4% (2008) Inflation rate (consumer prices) 1.1% (2012 est.) Agriculture utilized agricultural land: (2011) total wood resources: 144,2 million cubic metres crops: cotton, grain, rice, grapes, fruit, vegetables, tea, tobacco livestock products: beef, mutton, poultry, milk, eggs Industrial production growth rate -3% (2011 est.) Electricity production: 22,55 billion kWh (2008) consumption: 18,8 billion kWh (2008) exports: 812 million kWh (2008) imports: 596 million kWh (2008) Current account balance $11,12 billion (2011 est.) Exports commodities petroleum and natural gas, petroleum products, oilfield equipment; steel, iron ore, cement; chemicals, petrochemicals, textiles, machinery, cotton, foodstuffs. Reserves of foreign exchange and gold $7,146 billion (2011 est.) Debt external $3.89 billion (2011 est.) Currency 1 Manat = 100 gepik Exchange rates Azerbaijani manat per US dollar 1.7 (for 22 November 2020) Azerbaijani manat per Euro 2.01 (for 22 November 2020) Fiscal year Calendar year See also Azerbaijan and the International Monetary Fund List of companies of Azerbaijan Baku-Tbilisi-Ceyhan pipeline State Oil Company of Azerbaijan Petroleum industry in Azerbaijan Agriculture in Azerbaijan Tourism in Azerbaijan Baku Military of Azerbaijan Judiciary of Azerbaijan References Further reading Habibov, Nazim: "Poverty in Azerbaijan" in the Caucasus Analytical Digest No. 34 External links Hübner, Gerald: "As If Nothing Happened? How Azerbaijan's Economy Manages to Sail Through Stormy Weather" in the Caucasus Analytical Digest No. 18 Azerbaijan	10
Azerbaijan is a country in the Caucasus region, situated at the juncture of Eastern Europe and West Asia. Three physical features dominate Azerbaijan: the Caspian Sea, whose shoreline forms a natural boundary to the east; the Greater Caucasus mountain range to the north; and the extensive flatlands at the country's center. About the size of Portugal or the US state of Maine, Azerbaijan has a total land area of approximately 86,600 square kilometers, less than 1% of the land area of the former Soviet Union. Of the three Transcaucasian states, Azerbaijan has the greatest land area. Special administrative subdivisions are the Nakhchivan Autonomous Republic, which is separated from the rest of Azerbaijan by a strip of Armenian territory, and the Nagorno-Karabakh Autonomous Region, entirely within Azerbaijan. The status of Nagorno-Karabakh is disputed by Armenia, but is internationally recognized as territory of Azerbaijan. Located in the region of the southern Caucasus Mountains, Azerbaijan borders the Caspian Sea to the east, Georgia and Russia to the north, Iran to the south, and Armenia to the southwest and west. A small part of Nakhchivan also borders Turkey to the northwest. The capital of Azerbaijan is the ancient city of Baku, which has the largest and best harbor on the Caspian Sea and has long been the center of the republic's oil industry. Topography and drainage The elevation changes over a relatively short distance from lowlands to highlands; nearly half the country is considered mountainous. Notable physical features are the gently undulating hills of the subtropical southeastern coast, which are covered with tea plantations, orange groves, and lemon groves; numerous mud volcanoes and mineral springs in the ravines of Kobustan Mountain near Baku; and coastal terrain that lies as much as twenty-eight meters below sea level. Except for its eastern Caspian shoreline and some areas bordering Georgia and Iran, Azerbaijan is ringed by mountains. To the northeast, bordering Russia's Dagestan Autonomous Republic, is the Greater Caucasus range; to the west, bordering Armenia, is the Lesser Caucasus range. To the extreme southeast, the Talysh Mountains form part of the border with Iran. The highest elevations occur in the Greater Caucasus, where Mount Bazardüzü rises 4,466 meters above sea level. Eight large rivers flow down from the Caucasus ranges into the central Kura-Aras Lowlands, alluvial flatlands and low delta areas along the seacoast designated by the Azerbaijani name for the Mtkvari River (Kura) and its main tributary, the Aras. The Mtkvari, the longest river in the Caucasus region, forms the delta and drains into the Caspian a short distance downstream from the confluence with the Aras. The Mingechaur Reservoir, with an area of 605 square kilometers that makes it the largest body of water in Azerbaijan, was formed by damming the Kura in western Azerbaijan. The waters of the reservoir provide hydroelectric power and irrigation of the Kura-Aras plain. Most of the country's rivers are not navigable. About 15% of the land in Azerbaijan is arable. Mountains The country's highest peak, Bazardüzü, rises to 4,485 m in this range at the Azerbaijan-Russia border. Climate Temperature The climate varies from subtropical and humid in the southeast to subtropical and dry in central and eastern Azerbaijan, continental and humid in the mountains, and continental and dry in Nakhchivan. Baku, on the Caspian, enjoys mild weather that averages in January and in July. Precipitation Physiographic conditions and different atmosphere circulations admit 8 types of air currents including continental, sea, arctic, tropical currents of air that formulates the climate of the Republic. The maximum annual precipitation falls in Lenkeran (1,600 to 1,800 mm.) and the minimum in Absheron (200 to 350 mm.). The maximum daily precipitation of 334 mm was observed at the Bilieser Station in 1955. Environmental problems Air and water pollution are widespread and pose great challenges to economic development. Major sources of pollution include oil refineries and chemical and metallurgical industries, which in the early 1990s continued to operate as inefficiently as they had in the Soviet era. Air quality is extremely poor in Baku, the center of oil refining. Some reports have described Baku's air as the most polluted in the former Soviet Union, and other industrial centers suffer similar problems. The Caspian Sea, including Baku Bay, has been polluted by oil leakages and the dumping of raw or inadequately treated sewage, reducing the yield of caviar and fish. In the Soviet period, Azerbaijan was pressed to use extremely heavy applications of pesticides to improve its output of scarce subtropical crops for the rest of the Soviet Union. The continued regular use of the pesticide DDT in the 1970s and 1980s was an egregious lapse, although that chemical was officially banned in the Soviet Union because of its toxicity to humans. Excessive application of pesticides and chemical fertilizers has caused extensive groundwater pollution and has been linked by Azerbaijani scientists to birth defects and illnesses. Rising water levels in the Caspian Sea, mainly caused by natural factors exacerbated by man-made structures, have reversed the decades-long drying trend and now threaten coastal areas; the average level rose 1.5 meters between 1978 and 1993. Because of the Nagorno-Karabakh conflict, large numbers of trees were felled, roads were built through pristine areas, and large expanses of agricultural land were occupied by military forces. Like other former Soviet republics, Azerbaijan faces a gigantic environmental cleanup complicated by the economic uncertainties left in the wake of the Moscow-centered planning system. The Committee for the Protection of the Natural Environment is part of the Azerbaijani government, but in the early 1990s it was ineffective at targeting critical applications of limited funds, establishing pollution standards, or monitoring compliance with environmental regulations. Early in 1994, plans called for Azerbaijan to participate in the international Caspian Sea Forum, sponsored by the European Union (EU). Natural hazards Droughts and floods; some lowland areas threatened by rising levels of the Caspian Sea Environment—current issues Local scientists consider the Abseron Yasaqligi (Apsheron Peninsula) (including Baky and Sumqayit) and the Caspian Sea to be the ecologically most devastated area in the world because of severe air, water, and soil pollution; soil pollution results from the use of DDT as a pesticide and also from toxic defoliants used in the production of cotton. Environment - international agreements Party to: Air Pollution, Biodiversity, Climate Change, Desertification, Endangered Species, Hazardous Wastes, Marine Dumping, Ozone Layer Protection, Ship Pollution, Wetlands Area and boundaries Area Total: 86,600 km² - country comparison to the world: 113 Land: 82,629 km² Water: 3,971 km² Note: Includes the exclave of Nakhchivan Autonomous Republic and the Nagorno-Karabakh region; the region's autonomy was abolished by Azerbaijani Supreme Soviet on November 26, 1991. Area comparative Australia comparative: larger than Tasmania Canada comparative: larger than New Brunswick United Kingdom comparative: slightly larger than Scotland United States comparative: slightly smaller than Maine EU comparative: slightly smaller than Portugal Land boundaries Total: 2,468 km Border countries: Armenia (with Azerbaijan-proper) 566 km, Armenia (with Azerbaijan-Nakhchivan exclave) 221 km, Georgia 428 km, Iran (with Azerbaijan-proper) 432 km, Iran (with Azerbaijan-Nakhchivan exclave) 700 km, Russia 338 km, Turkey 17 km Coastline Mostly landlocked, but has a 713 km coastline with the Caspian Sea. Maritime claims None Terrain large, flat lowland (much of it below sea-level) with Great Caucasus Mountains to the north, uplands in the west Elevation extremes Lowest point: Caspian Sea -28 m Highest point: Bazardüzü 4,466 m (on the border with Russia) Highest peak entirely within Azeri territory: Shah Dagi 4,243 m Islands Resources and land use Natural resources Petroleum, natural gas, iron ore, nonferrous metals, bauxite Land use Arable land: 22.95% Permanent crops: 2.79% Other: 74.26% (2012 est.) Irrigated land 14,250 km² (2010) Total renewable water resources 34.68 km3 (2011) Freshwater withdrawal (domestic/industrial/agricultural) Total: 12.21 km3/yr (4%/18%/78%) Per capita: 1,384 cu m/yr (2010) See also References General references	5
The Azerbaijani Armed Forces () is the military of the Republic of Azerbaijan. It was re-established according to the country’s Law of the Armed Forces on 9 October 1991. The original Azerbaijan Democratic Republic's armed forces were dissolved after Azerbaijan was absorbed into the Soviet Union as the Azerbaijan Soviet Socialist Republic from 28 April 1920. After the Soviet Union dissolved in 1991–92, Azerbaijan's armed forces were reformed based on Soviet bases and equipment left on Azerbaijani soil. The armed forces have three branches: the Azerbaijani Land Forces, the Azerbaijani Air and Air Defence Force, and the Azerbaijani Navy. Associated forces include the Azerbaijani National Guard, the Internal Troops of Azerbaijan, and the State Border Service, which can be involved in state defense under certain circumstances. According to the Azerbaijani media sources the military expenditures of Azerbaijan for 2009 were set at US$2.46 billion, however according to Stockholm International Peace Research Institute, only $1.473 billion was spent in that year. IISS also suggests that the defence budget in 2009 was $1.5 billion. The Ministry of Defence Industry of Azerbaijan supervises the design, manufacturing, regulation and maintenance of military equipment. In the future, Azerbaijan hopes to start building tanks, armored vehicles, military planes and military helicopters. Overview Since the fall of the Soviet Union, Azerbaijan has been trying to further develop its armed forces into a professional, well trained, and mobile military. Azerbaijan has been undergoing extensive modernization and capacity expanding programs, with the military budget increasing from around $300 million in 2005 to $2.46 billion in 2009. The total armed forces number 56,840 men in the land forces, 7,900 men in the air force and air defence force, and 2,200 men in the navy. There are also 19,500 personnel in the National Guard, State Border Service, and Internal Troops. In addition, there are 300,000 former service personnel who have had military service in the last 15 years. The military hardware of Azerbaijan consists of 220 main battle tanks, an additional 162 T-80's were acquired between 2005 and 2010, 595 armored combat vehicles and 270 artillery systems. The air force has about 106 aircraft and 35 helicopters. Azerbaijan has acceded to the Nuclear Non-Proliferation Treaty as a non-nuclear weapons state. Azerbaijan participates in NATO's Partnership for Peace. Azerbaijan joined the multi-national force in 2003. It sent 150 troops to Iraq, and later troops to Kosovo. Azerbaijani troops also served in Afghanistan. Despite the rise in Azerbaijan's defence budget, the armed forces were assessed in 2008 as not having a high state of battle readiness and being ill-prepared for wide scale combat operations. The Second Karabakh War demonstrated how Azerbaijan's military capabilities had risen. History of the Azerbaijani armed forces Azerbaijan Democratic Republic The history of the modern Azerbaijan army dates back to Azerbaijan Democratic Republic in 1918, when the Armed Forces of the Republic of Azerbaijan were created on 26 June 1918. First de facto Minister of Defense of ADR was Dr. Khosrov bey Sultanov. When the Ministry was formally established Gen. Samedbey Mehmandarov became the minister, and then Lt-Gen. Ali-Agha Shikhlinski his deputy. Chiefs of Staff of ADR Army were Lt-Gen. Maciej Sulkiewicz (March 1919 – 10 December 1919) and Maj-Gen. Abdulhamid bey Gaitabashi (10 December 1919 – April 1920). The Red Army invaded Azerbaijan on 28 April 1920. Although the bulk of the newly formed Azerbaijani army was engaged in putting down an Armenian revolt that had just broken out in Karabakh, the Azerbaijanis did not surrender their brief independence of 1918–20 quickly or easily. As many as 20,000 of the total 30,000 soldiers died resisting what was effectively a Russian reconquest. The national Army of Azerbaijan was abolished by the Bolshevik government, 15 of the 21 army generals were executed by the Bolsheviks. Russian Civil War After the Sovietisation of Azerbaijan, the newly formed Azerbaijani Red Army replaced the previous army, taking part in the Russian Civil War, and the invasion of Georgia. World War II During World War II, Azerbaijan played a crucial role in the strategic energy policy of Soviet Union. Much of the Soviet Union's oil on the Eastern Front was supplied by Baku. By a decree of the Supreme Soviet of the USSR in February 1942, the commitment of more than 500 workers and employees of the oil industry of Azerbaijan was recognised with orders and medals. Operation Edelweiss carried out by the German Wehrmacht targeted Baku because of the importance of its oil fields to the USSR. Some 800,000 Azerbaijanis fought within the ranks of the Soviet Army of which 400,000 died. Azerbaijani national formations of the Red Army included the 223rd, 227th, 396th, 402nd, and 416th Rifle Divisions. Azerbaijani Major-General Hazi Aslanov was awarded a second Hero of the Soviet Union after a long post-war fight for recognition of his accomplishments. Dissolution of the Soviet armed forces During the Cold War, Azerbaijan had been the deployment area of units of the Soviet 4th Army whose principal formations in 1988 included four motor rifle divisions (23rd Guards, 60th, 75th, and 295th). The 75th Motor Rifle Division was isolated in Nakhchivan. The 4th Army also included missile and air defense brigades and artillery and rocket regiments. The 75th Division's stores and equipment were apparently transferred to the Nakhchivan authorities. Azerbaijan also hosted the 49th Arsenal of the Soviet Main Agency of Missiles and Artillery, which contained over 7,000 train-car loads of ammunition to the excess of one billion units. The first president of Azerbaijan, Ayaz Mutallibov, did not wish to build an independent army, wanting to rely instead largely on Soviet troops. Even when the Parliament decided that an army should be formed in September 1991, disagreements between the government and the opposition Azerbaijani Popular Front Party impeded creation of a unified force. Around this time, the first unit of the new army was formed on the basis of the 18–110 military unit of mechanized infantry of the Soviet Ground Forces (probably part of the 4th Army) located in Shikhov, south of Baku. At the time of the parliamentary decision, Lieutenant-General Valeh Barshadli became the first Minister of Defense of Azerbaijan, from 5 September to 11 December 1991. Later from May to 4 September 1992 he served as Chief of General Staff of Azerbaijani Armed Forces. Newly formed military In summer 1992, the nascent Defense Ministry received a resolution by the Azerbaijani president on the takeover of units and formations in Azerbaijani territory. It then forwarded an ultimatum to Moscow demanding control over vehicles and armaments of the 135th and 139th Motor Rifle Regiments of the 295th Motor Rifle Division. In July 1992, Azerbaijan ratified the Treaty on Conventional Armed Forces in Europe (CFE), which establishes comprehensive limits on key categories of conventional military equipment. Azerbaijan approved the CFE flank agreement in May 1997. The transfer of the property of the 4th Army (except for part of the property of the 366th Motor Rifle Regiment of the 23rd Guards Motor Rifle Division captured by Armenian armed formations in 1992 during the regiment's withdrawal from Stepanakert) and the 49th arsenal was completed in 1992. Thus, by the end of 1992, Azerbaijan received arms and military hardware sufficient for approximately four motor rifle divisions with prescribed army units. It also inherited naval ships. There are also reports that 50 combat aircraft from the disbanded 19th Army of the Soviet Air Defence Forces came under Azerbaijani control. The Azerbaijani armed forces took a series of devastating defeats by Armenian forces during the 1992–1994 Nagorno-Karabakh War, which resulted in the loss of control of Nagorno-Karabakh proper and seven surrounding rayons, comprising roughly 20% of the territory of Azerbaijan. Azerbaijani sources insist that Armenian victory was largely due to military help from Russia and the wealthy Armenian diaspora. Armenians partially deny the allegation, claiming that Russian side was equally supplying Armenian and Azerbaijani sides with weapons and mercenaries. During the war, the Azerbaijani armed forces were also aided by Turkish military advisers, and Russian, Ukrainian, Chechen and Afghan mercenaries. 21st century A number of Azerbaijani human rights groups have been tracking non-combat deaths and have noted an upward trend in early 2010s. Based on Defense Ministry statistics that had not been released to the public, the Group of Monitoring Compliance with Human Rights in the Army (GMCHRA) has recorded the deaths of 76 soldiers to date in non-combat incidents for 2011, and the injury of 91 others. In comparison, there were 62 non-combat deaths and 71 cases of injury in 2010. The string of non-combat deaths raises questions about the reform progress of the military. Factors behind the deaths include bullying, hazing, and the systemic corruption within the Azerbaijani military. In 2017, Azerbaijani authorities used large scale torture (the Tartar Case) on Azerbaijani military personnel accused of treason. Generals Nacmeddin Sadikhov and Hikmet Hasanov were accused of torturing Azerbaijani officers and soldiers and according to the authorities and human rights defenders, more than 400 people were subjected to torture in the course of the case. The Azerbaijani authorities claimed one person was killed as a result, while human rights defenders say the number is about 13, and many were wrongfully convicted and given hefty prison sentences. Second Karabakh War The Second Karabakh War (also known in Azerbaijan as "The Patriotic War" or "Operation Iron Fist") began on the morning of 27 September 2020 when Azerbaijan launched an offensive along the Line of Contact. On the seventh day of the war, a major offensive was launched by the ground forces, advancing in the north, making some territorial gains while the fighting gradually shifted to the south. Following the capture of Shusha, the second-largest settlement in Nagorno-Karabakh, by Azerbaijani forces, a ceasefire agreement was signed between Azerbaijan, and Armenia, ending all hostilities in the area. Under the agreement, Armenia returned the surrounding territories it occupied in 1994 to Azerbaijan while Azerbaijan gained land access to its Nakhchivan exclave. Total casualties were in the low thousands. During the war, the Azerbaijani army was widely accused of committing war crimes against Armenian soldiers and civilians. Human Rights Watch and Amnesty International both condemned Azerbaijan's “indiscriminate” shelling of Armenian civilians, including the use of cluster munitions. In addition, videos of Azerbaijani soldiers mistreating or executing captive Armenians were circulated online and received widespread condemnation. On 10 December, a victory parade was held in honor of the Azerbaijani Army on Azadliq Square, with 3,000 soldiers marching alongside military equipment, unmanned aerial vehicles and aircraft. In August 2022, the UN Committee on the Elimination of Racial Discrimination expressed deep concern regarding "severe and grave human rights violations committed during 2020 hostilities and beyond by the Azerbaijani military forces against prisoners of war and other protected persons of Armenian ethnic or national origin, including extrajudicial killings, torture and other ill-treatment and arbitrary detention as well as the destruction of houses, schools, and other civilian facilities." Structure Command Since the fall of the Soviet Union, there have been attempts in the defence ministry to reform the military to be more in line with the Turkish/NATO model, resulting in Soviet-legacy officers such as Rovshan Akbarov and Najmeddin Sadikov being removed from power. Azerbaijan periodically holds drills to improve interaction and combat coordination between the servicemen during operations, its military personnel’s combat readiness, as well as to develop commanders' military decision-making and unit management skills. Land Forces The Azerbaijani Land Forces number 85,000 strong, according to UK Advanced Research and Assessment Group estimates. The 2,500 men of the National Guard are also part of the ground forces. In addition, there are 300,000 former service personnel who have had military service in the last 15 years. Other paramilitary agencies consist of Interior Ministry Internal Troops of Azerbaijan, 12,000 strong, and the land component of the State Border Service, 5,000 strong. Azerbaijan has signed numerous contracts to strengthen its armed forces and to train its military with Turkey's assistance. Over the last 15 years, Azerbaijan has been preparing its military for possible action against Armenian forces in Nagorno-Karabakh. The Land Forces consist of five army corps: 1st Army Corps also known as Barda Army Corps (concentrated near Ganja) 2nd Army Corps also known as Beylagan Army Corps (concentrated against Armenian occupied territories and part is deployed on the Azerbaijan-Iranian border) 3rd Army Corps also known as Shamkir Army Corps (concentrated against Armenian occupied territories) 4th Army Corps also known as Baku Army Corps (covers Absheron Peninsula and the coast) Nakhchivan Separate Combined Arms Army (deployed in Nakhchivan) The Land Forces include 23 motor rifle brigades, an artillery brigade, a multiple rocket launcher brigade, and an anti-tank regiment. The IISS Military Balance reported in 2007 that the Land Forces had an estimated 40 SA-13 Gopher, SA-4 Ganef, and SA-8 Gecko air defence missile systems, with '80–240 eff.' to support the army in the battlefield. (IISS 2007, p. 157) The peacekeeping forces of Azerbaijan are mostly supplied from the Land Forces, though the Internal Troops of Azerbaijan do also supply some. As of March 2011, 94 peacekeepers were deployed with the International Security Assistance Force (ISAF) in Afghanistan. In the past, it also actively supported the peacekeeping operation in Kosovo and Iraq. The Azerbaijani peacekeeping unit deployed in Iraq consisted of 14 officers, 16 sergeants and 120 privates, a total of 150 troops. The unit secured the hydroelectric power station and reservoir in Al Haditha from August 2003. In December 2008, Azerbaijan withdrew the unit from Iraq. Reportedly in December 2014 Azerbaijan created the Separate Combined Arms Army in Nakhchivan. Karam Mustafayev became commander of the corps. The army was created based on the Nakhchivan 5th Army Corps to strengthen defense capability of Nakhchivan Autonomous Republic, increase of combat capability of military units and formations of the Armed Forces, improve central control, reports quoting the Defence Ministry said. Air forces The Azerbaijani Air and Air Defence Force is a single unified service branch. Some 8,000 men serve in the air force and air defence force. The Air and Air Defence Force has around 106 aircraft and 35 helicopters. The country has four major airbases. Nasosnaya (air base) has fighters, Kyurdamir Air Base a bomber regiment, Ganja Air Base transports, and Baku Kala Air Base the helicopter unit. There are also four other airbases which do not appear to have aircraft based there. These are Dollyar Air Base, Nakhchivan Airport, Sanqacal Air Base, and Sitalcay Air Base. The Azerbaijani Air Force using MiG-21, Su-24 and Su-25 aircraft, as well as the MiG-29 purchased from Ukraine in 2006 and Il-76 transport aircraft. The MiG-29 have been designated as the standard aircraft for the AzAF. Azerbaijan is holding talks with either the People's Republic of China or Pakistan to purchase JF-17 Thunder aircraft. MiG-25s previously in service have been retired seemingly in the 2007–09 period. Azerbaijan's helicopter force is concentrated at Baku Kala Air Base and according to the IISS consists of a single regiment with around 14–15 Mi-24, 12–13 Mi-8 and 7 Mi-2. Jane's Information Group and the IISS give figures which agree with only a single aircraft's difference. Recently, end of 2010 Russian Rosvertol announced that Azerbaijan armed forces signed a deal for 24 pieces of Mi-35M (Hind-E) gunships what would further enhance the Azerbaijani ground attack formations. The Air Force has L-39 advanced training aircraft in store. The Azerbaijan Border Guard and Voluntary Society of Defense, Patriotism and Sport have Yakovlev light training aircraft. Azerbaijan has missile and radar systems intended to defend Azerbaijani airspace. There are at least 2 divisions of S-300PMU2. Thereby the country has one of the most capable SAM surface-to-air missile system in the region. Azerbaijan also operates two S-200 (SA-5 GAMMON) batteries near Baku and Mingachevir; the S-300PMU-2 represents a logical replacement for these systems offering coverage of the majority of the nation. The country also has about 100 NATO designated SA-2 Guideline (original name S-75), SA-3 Goa (S-125 Pechora-2M), and the SA-5 Gammon (S-200) are in static installations. These may be around Baku and the central part to cover the whole Azerbaijani aerospace. However, August 2011 investigations shows that after purchase of S-300 surface-to-air missiles, the largest apparent gap in Azerbaijan's air defense system may have been filled. Also in Azerbaijan there was a former Soviet early warning radar. The Gabala Radar Station was a bistatic phased-array installation, operated by the Russian Space Forces. The contract was signed in 2002 and was due to expire in 2012 where it was to be given back to the Azerbaijani government. The contract costed Russia $7 million per year. The radar station had a range of up to , and was designed to detect intercontinental ballistic missile launches as far as from the Indian Ocean. In December 2012 Russia announced that negotiations had been unsuccessful and that they had stopped using the radar station. The site was given back to Azerbaijan and all the equipment dismantled and transported to Russia. Nowadays, Russia covers the area from the Armavir Radar Station. Navy The main naval base of the Soviet Union in the Caspian Sea was based in Baku. When the Soviet Union collapsed, Azerbaijan inherited the naval base and parts of the Caspian Sea Flotilla. The Azerbaijan Navy has about 2,200 personnel. In 2010, the navy had a Petya class light frigate, Qusar (G 121), and a number of patrol craft, including one Turk class, Araz, P 223, one Brya (Project 722) class, P 218, one Shelon (Project 1388M) class, P 212, one Poluchat class (Project 368), P 219, one Luga class (Project 888), T 710, and four Petrushka (Polish UK-3 class), P 213, P 214, P 215, and P 216. There are four minesweepers consisting of 2 Sonya class minesweeper and 2 Yevgenya class minesweepers. (Jane's Fighting Ships 2010) The Navy is also attributed with 5 landing craft, 3 Polnochny and 2 Vydra (IISS 2007), plus three research ships, 1 Project 10470, A 671, ex Svyaga, 1 Balerian Uryvayev class survey vessel (AG) and one Vadim Popov class survey vessel (AG). The U.S. Navy has helped train the Azerbaijani Navy. There is also an agreement to provide US support to refurbish Azerbaijani warships in the Caspian Sea. In 2006, the US Government donated 3 motorboats to the Azerbaijani Navy. In 2007, an agreement between the Azerbaijani Navy and a US military company was concluded, which stated that a part of the Azerbaijani Navy would be equipped with advanced laser marksmanship systems. The US company specialists were also to give training on the use of the new equipment. A number of separate U.S. programmes are underway under the Caspian Guard Initiative, focused mostly on enhancing Azerbaijani and Kazakh maritime border security. In May 2011, the president of the State Oil Company of Azerbaijan Republic Rovnag Abdullayev stated that Azerbaijan would start production of national warships after 2013. The Naval Intelligence of Azerbaijan maintains the 641st Special Warfare Naval Unit. The special forces were trained by the U.S. Navy SEALs Unit 641 has several midget submarines such as Triton-1M and Triton 2 at their disposal as well as underwater tool motion for individual divers. The special unit is composed of 3 reconnaissance groups, 2 groups for mountainous warfare, and one diving group. Obligatory training includes parachute jumping day and night, on land and on water. Special forces The Special Forces of Azerbaijan are part of the Ministry of Defence. It was established in April 1999 with officers and warrant officers who had participated in the First Nagorno-Karabakh War of 1991–1994. The Turkish Special Forces Command played a role in the formation of the unit. During the 2020 Nagorno-Karabakh War, personnel of the Special Forces reclaimed the city of Jebrayil and nine surrounding villages from the Armenian Army. On November 8, Aliyev congratulated the commander of the Special Forces on their "liberation of Shusha". The war was considered to be first time Azerbaijan has actively used all of its special forces units. Defense industry The Ministry of Defence Industry of Azerbaijan directs domestic military supplies for Azerbaijan. It was established in 2005. The Defence Industries Ministry subsumed the State Department for Military Industry and for Armaments and the Military Science Center, each of which was formerly a separate agency within the Azerbaijani Defense Ministry. The defense industry has emerged as an autonomous entity with a growing production capability. The ministry is cooperating with the defense sectors of Ukraine, Belarus and Pakistan. Along with other contracts, Azerbaijani defence industries and Turkish companies, Azerbaijan will produce 40mm revolver grenade launchers, 107mm and 122mm MLRS systems, Cobra 4×4 vehicles and joint modernization of BTR vehicles in Baku. The major military companies of Azerbaijan are: RPE Iglim, aviation and shipbuilding Radiogurashdirma, communication means and radio-electronic RPE Neftgazavtomat, devices and automation systems for monitoring technological processes RPE Automatic Lines, non-standard equipment and products for application in electrotechnical and machine engineering Avia-Agregat, multi-purpose aviation equipment, various airdrome conditioners, universal container of board conductor, air-to-air radiators, fuel-oil, air-to-air heat exchangers and ventilators In early 2008, reports indicated that an agreement with Turkey had been signed which would lead to Azerbaijan producing armoured personnel carriers, infantry fighting vehicles, and small calibre artillery pieces. International cooperation Azerbaijan cooperates with about 60 countries in the military-technical sphere and has an agreement on military-technical cooperation with more than 30 countries. Turkey In December 2009, an agreement on military assistance was signed by Turkey and Azerbaijan. The agreement envisions Ankara supplying Azerbaijan with weapons, military equipment, and, if necessary, soldiers in case war with Armenia over Karabakh resumes. Turkey has provided Azerbaijan with infantry weapons, tactical vehicles (jeeps, trucks, etc.) professional training, military organization, technology transfer, licensed military hardware production, and other services. Due to help from Turkish specialists and instructors, thousands of Azerbaijani officers have been trained to western standards. The military position as international importance of Azerbaijan increased with an agreement between Azerbaijan and Turkey on the participation an Azerbaijani peacekeeping platoon in the staff of the Turkish battalion in Kosovo. Since 1992, Azerbaijan and Turkey have signed more than 100 military protocols, some of the major protocols include: Cooperation of staff members National security cooperation in the topographical area Forming and training of professional school of forces in Baku Carrying out of the material and technical purchasing Military industry cooperation Development of the 5th Army Corps also known as Nakhchivan Army Corps in Nakhchivan Cooperation in the area of military history, military archives and museum work and military publication Assistance on training, material and technical between the Azerbaijan Border Guard and the Turkish Armed Forces. Long-term economical and military cooperation and application of the financial aid Application of material and technical provision In May 2011, Azerbaijan had discussed the purchase of long-range rockets from two Chinese companies, the minister of the defence industry has said. Other arms deals were signed with Turkey. Turkish Defence Minister Vecdi Gonul and Yaver Jamalov signed a protocol of intent on future joint production of two types of output – 107-mm rockets and the national rifle, possibly the Mehmetçik-1. A protocol of intent was signed the same day with the Mechanical and Chemical Industry Corporation MKEK on the joint production of 120-mm mortar launchers. This project will come into force in a few months time. Agreement has also been reached with Turkish company Aselsan on the production of some types of defence output in Azerbaijan, specifically the latest types of weapons' sights. These projects will probably happen in the near future too. Recently, Turkish defense industries secretariat told that an export version of the T-155 Firtina self-propelled howitser is almost done and could start production. T-155 has been powered by a German MTU power pack, which restricts the sale to some countries like Azerbaijan. The Turkish manufacturer MKEK, has announced that they have found an alternate supplier for the power pack where Azerbaijan showed interest to buy the high tech, more capable 155mm 52 caliber from Turkish authorities. United States Section 907 of the United States Freedom Support Act bans any kind of direct United States aid to the Azerbaijani government. Since a waiver was made in 2001 there has been extensive U.S. military cooperation with Azerbaijan. This has included Special Forces and naval aid, consultations with United States European Command, and linkages through the U.S. National Guard State Partnership Program. On 19 May 2006, Azerbaijani Defense Minister Safar Abiyev and the then commander of United States Air Forces in Europe General Tom Hobbins met in Baku to discuss military cooperation. He said the objective of his visit was to become familiar with the state of Azerbaijani armed forces. Hobbins pointed to the progress made in the NATO-Azerbaijan relations, saying that the successful implementation of the NATO Partnership for Peace program in Azerbaijan has brought the country even closer to the alliance. He said that the two countries' air forces will expand cooperation. The U.S. state of Oklahoma is linked with Azerbaijan through the U.S. National Guard State Partnership Program (SPP). Oklahoma National Guard troops have been sent on training and humanitarian missions to Baku. Russia Russia is one of Azerbaijan's main suppliers of arms. "As of today, military and technical cooperation with Russia is measured at $4 billion and it tends to grow further," President Ilham Aliyev said after meeting with Russian President Vladimir Putin in Baku in 2013. Israel Azerbaijan and Israel cooperate on numerous areas of the defense industry. Israel is Azerbaijan's largest weapon supplier with $4.85 billion in sales during 2016 alone. Azerbaijan has shown great interest in Israeli technology over the years. In particular, an agreement was reached over the construction of the factory of intelligence and combat drones in Azerbaijan. The Israeli defense company Elta Systems Ltd has had cooperation from Azerbaijan in building the TecSAR reconnaissance satellite system, which can take high-definition photos of ground surfaces in all weather conditions. According to Azerbaijani military experts, the TecSAR system will be indispensable for military operations in the mountainous terrains of Azerbaijan. As of June 2009, Israel and Azerbaijan had been negotiating on the production of Namer armoured infantry fighting vehicles in Azerbaijan. There is no further information as to whether any agreement has been made. NATO The North Atlantic Treaty Organization (NATO) and Azerbaijan actively cooperate on defence institutional reforms and have developed practical cooperation in many other areas. Azerbaijan's Individual Partnership Action Plan (IPAP) and its Partnership for Peace (PfP) linkages lay out the programme of cooperation between Azerbaijan and NATO. The Azerbaijani government has however delayed implementing IPAP-recommended reforms, however, in part at least because no decision had been taken to seek NATO membership. This is because Azerbaijan's foreign policy 'seeks to balance interests with the U.S., EU, Russia and Iran.' According to a NATO diplomatic source some key officials at NATO headquarters in Brussels were pushing hard for engaging Azerbaijan on the membership question. "Turkey, Romania, Italy, Poland, the United Kingdom and the Baltic states," are among the member-states also backing a fast track for Azerbaijan's NATO membership. However, Azerbaijan made its policy of not being aligned with a geopolitical/military structure official when it became a full member of the Non-Aligned Movement in 2011. There is also a limited amount of military cooperation with the other countries of GUAM: Georgia, Ukraine, Azerbaijan, and Moldova. Personnel Educational system The purpose of Azerbaijani military education & training is to train soldiers, officers, and non-commissioned officers to have independent and creative thinking and commitment to the Azerbaijani people and the government. Military education in the Azerbaijani Armed Forces have been described as either being Secondary education, Further education, or Higher education. Azerbaijani pilots were formerly trained in the Azerbaijan Air Force School, where they would then develop their skills in operational units. Azerbaijan has an experience exchange with Turkey, Ukraine, the United States and a number of NATO countries. The Turkish Air Force School has a great role in the training of Azerbaijani military pilots. Azerbaijani pilots are also trained in Ukraine's Pilot Training School. The following is a list of educational institutions in the armed forces, under the auspices of the National Defense University: Military academies War College of the Armed Forces Training and Education Center of the Armed Forces Azerbaijan Higher Military Academy Azerbaijan Higher Naval Academy (former independent institution) Azerbaijan High Military Aviation School (former independent institution) Other educational institutions Secondary Military Medical School of Azerbaijan Military Medical Faculty of Azerbaijan Medical University Military lyceums Jamshid Nakhchivanski Military Lyceum Heydar Aliyev Military Lyceum Conscription Military Justice Military Courts act as courts of first instance deals. The Military Court is composed of a President and judges. The following military courts exist in Azerbaijan: Military Court of Nakhchivan Autonomous Republic Baku Military Court (formed in August 1992) Ganja Military Court Lankaran Military Court Fuzuli-Gubadli Military Court Tartar Military Court Agdam Military Court Gazakh Military Court Sumgait Military Court Women and ethnic minorities in the armed forces During the first war, Russians, who were a large minority in Azerbaijan at the time, served in the units of the Azerbaijani Army, many of whom formerly served in the Soviet Army. According to the Russian Ministry of Defence more than 300 officers of the 7th Army, based in the capital of Baku, refused to leave Azerbaijan at the outset of the war. During the Second Karabakh War, the death of an ethnic Russian Azerbaijani soldier, Dmitry Solntsev, was reported. There was also Denis Aliyev (born as Denis Pronin) from the Xətai raion, who was killed in Jabrayil. He was later posthumously awarded the Medal "For the Liberation of Jabrayil" in December. Cossacks, associated with the Association of Cossacks of Azerbaijan, often join the Azerbaijani Armed Forces. Female military personnel in the military are generally involved in education, office work, medical care, and the development of international cooperation. They also serve in the rear, signal troops, and intelligence forces. Women are exempt from conscription, which means that female service is purely on a voluntary basis. There are currently 1,000 female personnel in the Azerbaijani military, accounting for 3% of the armed forces. During the Karabakh Conflict, 2,000 of the 74,000 Azerbaijani soldiers were women, and 600 of them directly took part in military operations, with a women's battalion being established in 1992. The enrollment of females in Azerbaijani higher military schools began in 1999. According to soldier Tehrana Bahruzi in her book, “Zakir Hasanov: the Ideal Minister", Defence Minister Zakir Hasanov was responsible for launching the first female unit in the Special Forces of Azerbaijan. In October 2020, the first female military casualty was reported, a combat medic who died while taking wounded soldiers from the battlefield. Personnel medals and awards Medal "For Bravery" Medal "For Fatherland" Medal "For Faultless Service" Medal "For blameless service" Medal "For distinction in military service" Medal "For distinction in the border" Medal "For merit in military collaboration" Medal "For military merit" Veteran of the Armed Forces Medal Brave Warrior Medal For Distinction in Battle Medal For Heroism Medal For military services medal Herbi Xidmlete Gore Medal Anniversary medals "10th Anniversary of the Armed Forces of Azerbaijan (1991–2001)" Medal "90th Anniversary of the Armed Forces of Azerbaijan (1918–2008)" Medal "95th Anniversary of the Armed Forces of Azerbaijan (1918–2013)" Medal Azerbaijani Army 100th anniversary medal Battle/war awards Hero of the Patriotic War Hero of the Patriotic War Medal Participant of the Patriotic War Medal For Services in the Rear in the Patriotic War Medal For the Liberation of Aghdam Medal For the Liberation of Fuzuli Medal For the Liberation of Gubadly Medal For the Liberation of Jabrayil Medal For the Liberation of Kalbajar Medal For the Liberation of Khojavend Medal For the Liberation of Lachin Medal For the Liberation of Shusha Medal For the Liberation of Sugovushan Medal For the Liberation of Zangilan Medal Today 'National Hero of Azerbaijan' is the highest national title in the country, awarded for outstanding services of national importance to Azerbaijan in defense, as well as other deeds in other spheres. Traditions and military institutions Military oath The military oath () is taken by conscripts as a legal basis of the beginning of their military service. The oath is administered by the commanding officer of the unit. The following is the text for the current version of the oath: Battle flags and pennants A battle flag for a military unit is a symbol of honor which remains forever in the unit unless it is dissolved. By military law, if the battle flag is lost in battle, the commander of the military unit and the servicemen under its command are brought to court, and the unit is abolished. Battle flags have the color of the State Flag, with the slogan "For Azerbaijan" being embroidered with golden silk on a blue stripe along the upper edge of the fabric. Outside the battle flag, the Azerbaijani military also utilizes the Turkish military tradition of pennants as symbols. Military holidays These are the military holidays observed by all service personnel the Armed Forces: 14 February – Air Force Day 9 May – Victory Day (Great Patriotic War) 26 June – Day of the Armed Forces 5 August – Day of the Azerbaijani Navy 27 September – Memorial Day 18 October – Day of the First Military Unit 8 November – Victory Day Azerbaijan Military History Museum Azerbaijan Military History Museum is a structure under the Ministry of Defense. It was established on 10 December 1992 by the order of the Minister of Defense and in accordance with a decree signed on 29 October 1992 "On the transfer of the Museum of Combat Glory of the VI Army Garrison of the Commonwealth of Independent States". Today, the museum displays 5 tanks, 9 armored personnel carriers, 16 artillery pieces, 6 aircraft, 4 helicopters, 6 different military equipment of the Air Force. Currently, the number of exhibits totals 11,000. Republican Veterans Organization After the Second World War, veterans movements were launched in Azerbaijan, with the Baku Veterans Committee being established on 10 June 1960. The activity of the committee was limited to Baku until the early 1970s. During the leadership of First Secretary Heydar Aliyev, there was a revival in the veteran movement, during which the committee gradually expanded to the republic. The establishment of the Republican Veterans Organization took place on 21 March 1987. Despite the official registration of the RVO with the Ministry of Justice, the activity of the organization was largely formal due to the tensions in the country with the Karabakh War, as well as the attitude of the government towards Red Army veterans in general. One of the first laws signed by the President Aliyev was the Law "On Veterans" (28 June 1994), which restored the mandate for the RVO. See also Judiciary of Azerbaijan Special Purpose Police Unit References Further reading U.S. Army War College Center for Strategic Leadership, Transformation of the Azerbaijani Armed Forces, October 2008 External links Official YouTube Channel of Azerbaijani Soldier program 1918 establishments in Azerbaijan	18
The economy of Armenia grew by 12.6% in 2022, according to the country's Statistical Committee and the International Monetary Fund. Total output amounted to 8.5 trillion Armenian drams, or $19.5 billion. At the same time, Armenia's foreign trade turnover significantly accelerated in growth from 17.7% in 2021 to 68.6% in 2022. GDP contracted sharply in 2020 by 7.2%, mainly due to the COVID-19 recession and the war against Azerbaijan. In contrast it grew by 7.6 per cent in 2019, the largest recorded growth since 2007, while between 2012 and 2018 GDP grew 40.7%, and key banking indicators like assets and credit exposures almost doubled. While part of the Soviet Union, the economy of Armenia was based largely on industry—chemicals, electronic products, machinery, processed food, synthetic rubber and textiles; it was highly dependent on outside resources. Armenian mines produce copper, zinc, gold and lead. The vast majority of energy is produced with imported fuel from Russia, including gas and nuclear fuel for Armenia's Metsamor nuclear power plant. The main domestic energy source is hydroelectric. Small amounts of coal, gas and petroleum have not yet been developed. The severe trade imbalance has been offset somewhat by international aid, remittances from Armenians abroad, and foreign direct investment. Armenia is a member of the Eurasian Economic Union and ties with Russia remain close, especially in the energy sector. Overview Under the old Soviet central planning system, Armenia had developed a modern industrial sector, supplying machine tools, textiles, and other manufactured goods to sister republics in exchange for raw materials and energy. Since the implosion of the USSR in December 1991, Armenia has switched to small-scale agriculture away from the large agroindustrial complexes of the Soviet era. The agricultural sector has long-term needs for more investment and updated technology. Armenia began borrowing soon after declaring independence. In 2000, Armenian governmental debt reached its greatest level relative to GDP (49.3 percent of GDP). Armenia is a food importer, and its mineral deposits (gold and bauxite) are small. The ongoing conflict with Azerbaijan over the ethnic Armenian-dominated region of Nagorno-Karabakh and the breakup of the centrally directed economic system of the former Soviet Union contributed to a severe economic decline in the early 1990s. Political instability and the threat of war placed a significant strain on economic development. Despite robust growth in recent years, the problem of geopolitical uncertainty resurfaced during the 2020 war, contributing to a 7.2% drop in GDP. Armenia's public debt rose to 67.4% in 2020, but fell below 50% again in 2022. Global competitiveness In the 2020 report of Index of Economic Freedom by Heritage Foundation, Armenia is classified as "mostly free" and ranks 34th, improving by 13 positions and ahead of all other Eurasian Economic Union countries and several EU countries including Cyprus, Bulgaria, Romania, Poland, Belgium, Spain, France, Portugal and Italy. In the 2019 report (data for 2017) of Economic Freedom of the World published by Fraser Institute Armenia ranks 27th (classified most free) out of 162 economies. In the 2019 report of Global Competitiveness Index Armenia ranks 69th out of 141 economies. In the 2020 report (data for 2019) of Doing Business Index Armenia ranks 47th with 10th rank on "starting business" sub-index. In the 2019 report (data for 2018) of Human Development Index by UNDP Armenia ranked 81st and is classified into "high human development" group. In the 2021 report (data for 2020) of Corruption Perceptions Index by Transparency International Armenia ranked 60 of 179 countries. History of the modern Armenian economy At the beginning of the 20th century, the territory of present-day Armenia was an agricultural region with some copper mining and cognac production. From 1914 through 1921, Caucasian Armenia suffered from genocide of about 1.5 million Armenian inhabitants on their own homeland which obviously caused total property and financial collapse when all their assets and belongings were forcibly taken away by the Turks the consequences of which after 105 years to this day remain incalculable, revolution, the influx of refugees from Turkish Armenia, disease, hunger and economic misery. About 200,000 people died in 1919 alone. At that point, only American relief efforts saved Armenia from total collapse. Thus, Armenians went from being one of the wealthiest ethnic groups in the region to suffering from poverty and famine. Armenians were the second richest ethnic group in Anatolia after the Greeks, and they were heavily involved in very high productive sectors such as banking, architecture, and trade. However, after the mass killings of Armenian intellectuals in April 1915 and the genocide targeted towards the whole Armenian population left the people and the country in ruins. The genocide was responsible for the loss of many high-quality skills that the Armenians possessed. The first Soviet Armenian government regulated economic activity stringently, nationalizing all economic enterprises, requisitioning grain from peasants, and suppressing most private market activity. This first experiment of state control ended with the advent of Soviet leader Vladimir Lenin's New Economic Policy (NEP) of 1921–1927. This policy continued state control of the large enterprises and banks, but peasants could market much of their grain, and small businesses could function. In Armenia, the NEP years brought partial recovery from the economic disaster of the post-World War I period. By 1926 agricultural production in Armenia had reached nearly three-quarters of its prewar level. By the end of the 1920s, Stalin's regime had revoked the NEP and re-established the centralised state monopoly on all economic activity. Once this occurred, the main goal of the Soviet economic policy in Armenia was to turn a predominantly agrarian and rural republic into an industrial and urban one. Among other restrictions, peasants now were forced to sell nearly all of their output to state procurement agencies rather than at the open market. From the 1930s through the 1960s, an industrial infrastructure has been constructed. Besides hydroelectric plants and canals, roads were built and gas pipelines were laid to bring fuel and food from Azerbaijan and Russia. The Stalinist command economy, in which market forces were suppressed and all orders for production and distribution came from the state authorities, survived in all its essential features until the fall of the Soviet regime in 1991. In the early stages of the communist economic revolution, Armenia underwent a fundamental transformation into a "proletarian" society. Between 1929 and 1939, the percentage of Armenia's work force categorised as industrial workers grew from 13% to 31%. By 1935 industry supplied 62% of Armenia's economic production. Highly integrated and sheltered within artificial barter economy of the Soviet system from the 1930s until the end of the communist era, the Armenian economy showed few signs of self-sufficiency at any time during that period. In 1988, Armenia produced only 0.9% of the net material product of the Soviet Union (1.2% of industry, 0.7% of agriculture). The republic retained 1.4% of total state budget revenue, delivered 63.7% of its NMP to other republics, and exported only 1.4% of what it produced to markets outside the Soviet Union. Agriculture accounted for only 20% of net material product and 10% of employment before the breakup of the Soviet Union in 1991. Armenia's industry was especially dependent on the Soviet military-industrial complex. About 40% of all enterprises in the republic were devoted to defense, and some factories lost 60% to 80% of their business in the last years of the Soviet Union, when massive cuts were made in the national defense expenditures. As the republic's economy faced the prospects of competing in world markets in the mid 1990s, the great liabilities of Armenia's industry were its outdated equipment and infrastructure and the pollution emitted by many of the country's heavy industrial plants. The economic downturn that began in 1989 worsened dramatically in 1992. According to statistics, the GDP declined by 37.5 percent in 1991 compared to 1990, and all sectors contributing to the GDP decreased in production. The collapse of industry in favor of agriculture, whose products were mostly imported throughout the Soviet period, changed the structure of sectoral contributions to GDP. In 1991, Armenia's last year as a Soviet republic, national income fell 12% from the previous year, while per capita gross national product was 4,920 rubles, only 68% of the Soviet average. In large part due to the earthquake of 1988, the Azerbaijani blockade that began in 1989 and the collapse of the international trading system of the Soviet Union, the Armenian economy of the early 1990s remained far below its 1980 production levels. In the first years of independence (1992–93), inflation was extremely high, productivity and national income dropped dramatically, and the national budget ran large deficits. A period of chronic shortages, was the first stage of price deregulation, which allowed goods to stay in Armenia as opposed to being exported for better prices; the inflation rates were 10 percent in 1990, 100 percent in 1991, and 642.5 percent during the first four months of 1992, compared with the first four months of 1991. Thus, there were two opposing dynamics: price increases in response to shortages and falling incomes due to the recession and unemployment. Post-communist economic reforms Armenia introduced elements of the free market and privatisation into their economic system in the late 1980s, when Mikhail Gorbachev began advocating economic reform. To supply the country's basic needs, the first decision was land reform and the privatization of land. This allowed for the emergence of small-parcel agriculture supplying markets and supporting self-sustenance during the period of shortages. Cooperatives were set up in the service sector, particularly in restaurants, although substantial resistance came from the Communist Party of Armenia (CPA) and other groups that had enjoyed privileged position in the old economy. In the late 1980s, much of Armenia's economy already was opening either semi-officially or illegally, with widespread corruption and bribery. The so-called mafia, made up of interconnected groups of powerful officials and their relatives and friends, sabotaged the efforts of reformers to create a lawful market system. When the December 1988 earthquake brought millions of dollars of foreign aid to the devastated regions of Armenia, much of the money went to corrupt and criminal elements. Beginning in 1991, the democratically elected government pushed vigorously for privatisation and market relations, although its efforts were frustrated by the old ways of doing business in Armenia, the Azerbaijani blockade, and the costs of the First Nagorno-Karabakh War. In 1992, the Law on the Programme of Privatisation and Decentralisation of Incompletely Constructed Facilities established a state privatisation committee, with members from all political parties. In middle 1993, the committee announced a two-year privatisation programme, whose first stage would be privatisation of 30% of state enterprises, mostly services and light industries. The remaining 70%, including many bankrupt, nonfunctional enterprises, were to be privatised in a later stage with a minimum of government restriction, to encourage private initiative. For all enterprises, the workers would receive 20% of their firm's property free of charge; 30% would be distributed to all citizens by means of vouchers; and the remaining 50% was to be distributed by the government, with preference given to members of the labour organisations. A major problem of this system, however, was the lack of supporting legislation covering foreign investment protection, bankruptcy, monopoly policy, and consumer protection. In the first post-communist years, efforts to interest foreign investors in joint enterprises were only moderately successful because of the blockade and the energy shortage. Only in late 1993 was a department of foreign investment established in the Ministry of Economy, to spread information about Armenia's investment opportunities and improve the legal infrastructure for investment activity. A specific goal of this agency was creating a market for scientific and technical intellectual property. A few Armenians living abroad made large-scale investments. Besides a toy factory and construction projects, diaspora Armenians built a cold storage plant (which in its first years had little produce to store) and established the American University of Armenia in Yerevan to teach the techniques necessary to run a market economy. Armenia was admitted to the International Monetary Fund in May 1992 and to the World Bank in September. A year later, the government complained that those organisations were holding back financial assistance and announced its intention to move toward fuller price liberalisation, and the removal of all tariffs, quotas, and restrictions of foreign trade. Although privatisation had slowed because of catastrophic collapse of the economy, Prime Minister Hrant Bagratyan informed the United States officials in the fall of 1993 that plans had been made to embark on a renewed privatisation programme by the end of the year. Like other former states, Armenia's economy suffers from the legacy of a centrally planned economy and the breakdown of former Soviet trading patterns. Soviet investment in and support of Armenian industry has virtually disappeared, so that few major enterprises are still able to function. In addition, the effects of the 1988 earthquake, which killed more than 25,000 people and made 500,000 homeless, are still being felt. Although a cease-fire has held since 1994, the conflict with Azerbaijan over Nagorno-Karabakh has not been resolved. The consequent blockade along both the Azerbaijani and Turkish borders has devastated the economy, because of Armenia's dependence on outside supplies of energy and most raw materials. Land routes through Azerbaijan and Turkey are closed; routes through Georgia and Iran are adequate and reliable. In 1992–93, the GDP had fallen nearly 60% from its 1989 level. The national currency, the dram, suffered hyperinflation for the first few years after its introduction in 1993. Armenia has registered strong economic growth since 1995 and inflation has been negligible for the past several years. New sectors, such as precious stone processing and jewelry making and communication technology (primarily Armentel, which is left from the USSR era and is owned by external investors). This steady economic progress has earned Armenia increasing support from international institutions. The International Monetary Fund (IMF), World Bank, EBRD, as well as other international financial institutions (IFIs) and foreign countries are extending considerable grants and loans. Total loans extended to Armenia since 1993 exceed $800 million. These loans are targeted at reducing the budget deficit, stabilizing the local currency; developing private businesses; energy; the agriculture, food processing, transportation, and health and education sectors; and ongoing rehabilitation work in the earthquake zone. By 1994, however, the Armenian government had launched an ambitious IMF-sponsored economic liberalization program that resulted in positive growth rates in 1995–2005. The economic growth of Armenia expressed in GDP per capita was one of strongest in the CIS. GDP went from $350 to more than $800 on average between 1995 and 2003. Three principal factors explain this result: the credibility of the macroeconomic policies of stabilization, the correction effect following the depression, and the importance of external transfers, in particular since 2000. Armenia became a member of the World Trade Organization (WTO) in January 2003. Armenia also has managed to slash inflation, stabilize its currency, and privatize most small- and medium-sized enterprises. Armenia's unemployment rate, however, remains high, despite strong economic growth. The chronic energy shortages Armenia suffered in the early and mid-1990s have been offset by the energy supplied by one of its nuclear power plants at Metsamor. Armenia is now a net energy exporter, although it does not have sufficient generating capacity to replace the Metsamor nuclear plant, which is under international pressure to close due to its old design. The European Union had classified the VVER 440 Model V230 light-water-cooled reactors as the "oldest and least reliable" category of all the 66 Soviet reactors built in the former Eastern Bloc. However the IAEA has found that the Metsamor NPP has adequate safety and can function beyond its design lifespan. The country's electricity distribution system was privatized in 2002. Outperforming GDP growth According to official preliminary data GDP grew by 7.6 per cent in 2019, largest recording growth since 2008. Nominal GDP per capita was approximately $4,196 in 2018 and is expected to reach $8,283 in 2023, surpassing neighbouring Azerbaijan and Georgia. With 8.3% Armenia recorded highest degree of GDP growth among Eurasian Economic Union countries in 2018 January–June against the same period of 2017. Earlier, the economy of Armenia grew by 7.5% in 2017 and reached a nominal GDP of $11.5 billion per annum, while per capita figure grew by 10.1% and reached $3880. With 7.29% Armenia was second best in GDP per capita growth terms in Europe and Central Asia in 2017. Armenian GDP PPP (measured in current international dollar) grew total of 316% per capita in the years 2000-2017 becoming 6th best worldwide in these terms. GDP grew 40.7% between 2012 and 2018, and key banking indicators like assets and credit exposures almost doubled. 2020 recession The Armenian economy performed poorly in 2020, and contracted by 7.2% after years of consecutive growth. The two biggest contributing factors were the COVID-19 recession and the Second Nagorno-Karabakh War. In the first half of 2020, the Armenian economy was negatively impacted by the economic restrictions that were implemented in response to the COVID-19 pandemic. These restrictions included a stay-at-home order, an indoor social distancing requirement, and a mask mandate. These restrictions had a negative impact on businesses; according to the World Bank, individual consumption dropped by 9% in the first six months of 2020 due to the stay-at-home order. The economy was further impacted by the war against Azerbaijan later in the year. Early in the war, the central government mobilized the country by converting private businesses into public ones, producing masks and military equipment. During this time, many factories were converted from private-use to public, which further negatively impacted the nation's economic output. Main sectors of economy Agricultural sector Armenia produced in 2018: 415 thousand tons of potato; 199 thousand tons of vegetable; 187 thousand tons of wheat; 179 thousand tons of grape; 138 thousand tons of tomato; 126 thousand tons of watermelon; 124 thousand tons of barley; 109 thousand tons of apple; 104 thousand tons of apricot (12th largest world producer);; 89 thousand tons of cabbage; 54 thousand tons of sugar beet; 52 thousand tons of peach; 50 thousand tons of cucumber; 39 thousand tons of onion; In addition to smaller productions of other agricultural products. As of 2010, the agricultural production comprises on average 25 percent of Armenia's GDP. In 2006, the agricultural sector accounted for about 20 percent of Armenia's GDP. Armenia's agricultural output dropped by 17.9 percent in the period of January–September 2010. This was owing to bad weather, a lack of a government stimulus package, and the continuing effects of decreased agricultural subsidies by the Armenian government (per WTO requirements). In addition, the share of agriculture in Armenia's GDP hovered around 17.9% until 2012 according to the World Bank. Then already in 2013 the share of it was a bit higher comprising 18.43%. Afterwards a declining trend was registered in the period of 2013-2017 reaching to around 14.90% in 2017. By comparing the share of agriculture as a component of GDP with the neighboring countries (Georgia, Azerbaijan, Turkey, Iran) one can notice that the percentage is highest for Armenia. As of 2017 the contribution of agriculture to the GDP for the neighboring countries was 6.88, 5.63, 6.08 and 9.05 respectively. In 2022, the industry with the highest number of companies registered in Armenia is Services with 1,907 companies followed by Wholesale Trade and Manufacturing with 510 and 408 companies respectively. Mining In 2017, mining industry output with grew by 14.2% to 172 billion AMD at current prices and run at 3.1% of Armenia's GDP. In 2017, mineral product (without precious metals and stones) exports grew by 46.9% and run at US$692 million, which comprised 30.1% of all exports. Construction sector Real estate transactions count grew by 36% in September 2019 compared to September 2018. Also, the average market value of one square meter of housing in apartment buildings in Yerevan in September 2019 grew by 10.8% from September 2018. In 2017, construction output increased by 2.2% reaching 416 billion AMD. Armenia experienced a construction boom during the latter part of the 2000s. According to the National Statistical Service, Armenia's booming construction sector generated about 20 percent of Armenia's GDP during the first eight months of 2007. According to a World Bank official, 30 percent of Armenia's economy in 2009 came from the construction sector. However, during the January to September 2010 period, the sector experienced a 5.2 percent year-on-year decrease, which according to the Civilitas Foundation is an indication of the unsustainability of a sector based on an elite market, with few products for the median or low budgets. This decrease comes despite the fact that an important component of the government stimulus package was to support the completion of ongoing construction projects. Energy In 2017, electricity generation increased by 6.1% reaching 7.8 billion KWh. Digital economy The digital economy is a branch of the economy based on digital computing technologies. The digital economy is sometimes referred to as the Internet economy or the web economy. The digital economy is often intertwined with the traditional economy, making it difficult to distinguish between them. Aimed at the sector's development on November 15, 2021, the Silicon Mountains Summit dedicated to introducing intelligent solutions in the economy was held in Yerevan. The main topic of the summit was the prospect of digitalization of the economy in Armenia. The main driving force of this sphere in Armenia is the banks. Digital transformation is a necessity for banks and financial institutions. At the moment, ACBA Bank is the leader․ Industrial sector In 2017, industrial output increased by 12.6% annually reaching 1661 billion AMD. Industrial output was relatively positive throughout 2010, with year-on-year average growth of 10.9 percent in the period January to September 2010, due largely to the mining sector where higher global demand for commodities led to higher prices. According to the National Statistical Service, during the January–August 2007 period, Armenia's industrial sector was the single largest contributor to the country's GDP, but remained largely stagnant with industrial output increasing only by 1.7 percent per year. In 2005, Armenia's industrial output (including electricity) made up about 30 percent of GDP. Services sector In the 2000s, along with the construction sector, the services sector was the driving force behind Armenia's recent high economic growth rate. Between 2017 and 2019, Armenia's economy increased fast, with annual rate of GDP growth averaging 6.8 percent. Following the political realignment of 2018, prudent macroeconomic policy helped develop a track record of macroeconomic stability and an enhanced business environment. In Armenia, the service sector in 2020 reduced volumes by 14.7%, against 15% growth a year earlier, amounting to 1.7 trillion drams ($3.5 billion). According to the Statistical Committee, a negative trend was recorded in all service segments except finance, as well as information and communication. Retail trade In 2010, retail trade turnover was largely unaltered compared to 2009. The existing monopolies throughout the retail sector have made the sector non-responsive to the crisis and resulted in near zero growth. The aftermath of the crisis has started to shift the structure in the retail sector in favor of food products. Nowadays(2019), Armenia has improved standards of living and growing income, which brought to the improvement of retail sector in Armenia. retail sector has the highest employment level. While the sector improves, currently the major sector is still in Yerevan, and not in the other cities of Armenia. The development that happened in this sector was the opening of Dalma Garden Mall, and later Yerevan mall, Rio mall and Rossia mall, which dramatically increased the quality of retail in Yerevan. Currently there is a new development, as in Gyumri there is a new mall opened called Shirak Mall. Another reason for the development of the retail is the development that happened in the banking industry. Today people can easily get financial assistance from the banks right to their credit cards, without visiting the bank. Information and Communication Technologies As of February 2019 nearly 23 thousand employees were counted in ICT sector. With 404 thousand AMD they enjoyed highest pay rate among surveyed sectors of economy. Average salaries in pure IT sector (excluding communications sub-sector) stood at 582 thousand AMD. Financial Services In January 2019 there were 20.5 thousand employees registered in the financial sector. According to Moody's, robust economic growth will benefit banks with GDP growth remaining robust at around 4.5% in 2019–20. Industry report on banking sector prepared by AmRating presents slightly varying figures for some of above data. Tourism Tourism in Armenia has been a key sector to the Armenian economy since the 1990s when tourist numbers exceeded half a million people visiting the country every year (mostly ethnic Armenians from the Diaspora). The Armenian Ministry of Economy reports that most international tourists come from Russia, EU states, the United States and Iran. Though relatively small in size, Armenia has four UNESCO world heritage sites. Despite internal and external problems, the number of incoming tourists has been continually increasing. 2018 saw a record high of over 1.6 million inbound tourists. In 2018, receipts from international tourism amounted to $1.2 billion, nearly twice the value for 2010. In per capita terms these stood at $413, ahead of Turkey and Azerbaijan, but behind Georgia. In 2019, the largest growth at 27.2% was shown by accommodation and catering sector, which came as a result of the growth of tourist flows. Financial system Foreign debt The amount of interest paid on the public debt rose significantly (from AMD 11 billion in 2008 to AMD 46.5 billion in 2013), as did the amount of principle repayments (from annual repayments of US$15–16 million in 2005-2008 exceeding US$150 million in 2013). This is a significant financial load on the state budget. Because of additional borrowings and lower concessionality of new loans, the burden might rise in the future years. In 2019, the Armenian government planned to obtain about $490 million in fresh loans rising public debt to about $7.5 billion. Just over $6.9 billion of that would be the government's debt. After reaching nearly 60.0 per cent of GDP, the public debt to GDP ratio decreased by approximately three percentage points in 2018 compared with a year before and stood at 55.7 per cent at the end of 2018. The government's public debt at the end of 2019 stood at $6.94 billion, making 50.3% of its GDP. In March 2019, sovereign debt comprised $5488 million, $86.5 million (about 2%) less than a year ago. Other sources quote Armenia's debt at $10.8 billion in September 2018, possibly including non-public debt too. In 2018, debt-to-GDP ratio stood at 55.7% down from 58.7% in 2017. Armenia revised the country's fiscal rules in 2018, setting a permissible threshold for public debt in the amount of 40, 50 and 60% of GDP. At the same time, it established that in case of force majeure situations such as natural disasters, wars, the government will be allowed to exceed this threshold. The debt rose by $863.5 million in 2016 and by another $832.5 million in 2017. It totalled just $1.9 billion before the 2008-2009 (13.5% of GDP) global financial crisis that plunged the county into a severe recession. Exchange rate of national currency National Statistics Office publishes official reference exchange rates for each year. Inflation For 2023, the IMF forecasts inflation at 3.5%, which is below most neighbouring countries. The Armenian government projects inflation at 2.7% in 2019. The inflation rate in Armenia in 2020 was 1.21 percent, a 0.23 percent decrease over 2019, in 2019 was 1.44 percent, a 1.08 percent decrease over 2018, in 2018 was 2.52 percent, up 1.55 percent from 2017 and in 2017 was 0.97 percent, a 2.37 percent rise from 2016. Cash remittances Cash remittances sent back home from Armenians working abroad — mostly in Russia and the United States — contribute significantly to Armenia's Gross Domestic Product making up 14% of GDP in 2018. They help Armenia sustain double-digit economic growth and finance its massive trade deficit. In 2008, transfers reached record high of $2.3 billion. In 2015, they reached 10-year low at $1.6 billion. In 2018, they run at round $1.8 billion. $0.8 billion were transferred in first half of 2019. According to CBA their impact on economy is decreasing, as GDP grows at outperforming rate. Net private transfers decreased in 2009, but saw a continuous increase during the first six months of 2010. Since private transfers from the Diaspora tend to be mostly injected into consumption of imports and not in high value-added sectors, the transfers have not resulted in sizeable increases in productivity. According to the Central Bank of Armenia, during the first half of 2008, cash remittances sent back to Armenia by Armenians working abroad rose by 57.5 percent and totaled US$668.6 million, equivalent to 15 percent of the country's first-half Gross Domestic Product. However, the latter figures only represent cash remittances processed through Armenian commercial banks. According to RFE/RL, comparable sums are believed to be transferred through non-bank systems, implying that cash remittances make up approximately 30 percent of Armenia's GDP in the first half of 2008. In 2007, cash remittances through bank transfers rose by 37 percent to a record-high level of US$1.32 billion. According to the Central Bank of Armenia, in 2005, cash remittances from Armenians working abroad reached a record-high level of $1 billion, which is worth more than one fifth of the country's 2005 GDP. Banking The central bank has set additional capital buffers in the banking sector. In force since April 2019, the regulator set three buffers exceeding the current capital adequacy requirement compliant with the Basel III regulation: a capital conservation buffer, a counter-cyclical capital buffer and a systemic risk buffer. Full implementation of the buffers over the course of the next few years will strengthen the financial sector's resistance to economic shocks and help increase the efficiency of macroprudential policies. Armenian banks' lending grew by 10 percent in 2019. Microfinance The establishment of Microfinance Institutions in Armenia was dependent on them making a complementary effort to fill the gap in the financial services sector. Its primary goal was to deal with the rising unemployment and poverty brought on by transitory shock. In this context, self-employment in the country emerged as one of the best options to unemployment. Commercial banking institutions in Armenia overlooked micro-business enterprises that lacked credit histories and sufficient funding. Microfinance has been proposed as an adaptable instrument to assist people in transition economies take advantage of new opportunities. Government revenues and taxation Government revenues In August 2019 Moody's Investors Service upgraded Armenia to Ba3 rating with stable outlook. According to the National Statistical Service, Armenia's government debt stood at AMD 3.1 trillion (about $6,4 billion, including $5,1 billion of external debt) as of November 30, 2017. Armenia's debt-to-GDP ratio will drop by 1% in 2018 according to finance minister. In Armenia's external debt ($5.5 billion as of January 1, 2018), the arrears for multi-country credit programs dominate - 66.2% or $3.6 billion, followed by debt on bilateral loan programs - 17.5% or $958.9 million and investments of non-residents in Armenian Eurobonds - 15,4% or $844.9 million. For the whole Armenian economy and international commerce, 2020 was a year of decline. In a variety of areas, Armenian commodities are being exported and imported at a lower rate. According to the Armenian Statistical Committee, Armenia exported goods worth $2.544 billion in 2020, a fall of 3.9 percent from 2019. Armenia imported items worth 4.559 billion dollars in 2020, down 17.7% from the previous year.The volume of Armenia's international trade has varied throughout the previous 10 years. Taxation Employee income tax From January 1, 2020, Armenia will switch to a flat income taxation system, which, regardless of the amount will tax wages at 23%. Moreover, until 2023 the taxation rate will gradually decrease from 23% to 20%. Corporate income tax The reform adopted in June 2019, aims to boost medium-term economic activity and to increase tax compliance. Among other measures, the corporate income tax was reduced by two percentage points to 18.0 per cent and the tax on dividends for non-resident organisations halved to 5.0 per cent. Special taxation for small business From January 1, 2020, the republic will abandon two alternative tax systems - self-employed and family entrepreneurship. They will be replaced by micro-entrepreneurship with a non-taxable threshold of up to 24 million drams. Business entities that carry out specialized activities, in particular, accounting, advocacy, and consulting will not be considered as micro-business entities. Micro business will be exempted from all types of taxes other than income tax, which will be 5 thousand drams per employee. Value-added tax Over half of the tax revenues in the January–August 2008 time period were generated from value-added taxes (VAT) of 20%. By comparison, corporate profit tax generated less than 16 percent of the revenues. This suggests that tax collection in Armenia is improving at the expense of ordinary citizens, rather than wealthy citizens (who have been the main beneficiaries of Armenia's double-digit economic growth in recent years). VAT (Value Added Tax): In Armenia, VAT-paying individuals subtract the VAT paid on their inputs from the VAT levied on their sales and account to the tax authorities for the difference. The standard rate of VAT on domestic sales of goods and services, as well as imports importation, is 20%. Exports of products and services are not taxed. Foreign trade, direct investments and aid Foreign trade Exports According to the National Statistical Committee, in 2018, exports amounted to $2.411.9 billion, having grown by 7.8% from the previous year. After a boom of almost 93% in 2022, the IMF expects exports of goods and services to grow by 22% in 2023 and 8% in 2024. The goods export structure changed considerably in 2018 as the export of the traditional mining sector decreased while the share of textiles, agriculture and precious metals increased. Geographical location of the country and relatively low electricity costs are comparative advantages supporting to boost the production of the textile and leather products in Armenia. Proximity to Europe in comparison with manufacturers in East Asia creates opportunity to strengthen Armenia's position as contract manufacturing destination for European brands. Foreign companies that put orders to Armenian companies are mainly famous European brands, particularly, from Italy (La Perla, SARTIS, VERSACE etc.) and Germany (LEBEK International Fashion, KUBLER Bekliedungswerk). With the Armenia's entry into Eurasian Economic Commission, the opportunity to increase its presence with textile and leather production raised also in the countries of Eurasian Economic Commission as no customs duty applies to Armenian products in the export markets within the customs union. According to the study REGIONAL AND INTERNATIONAL TRADE OF ARMENIA: PERSPECTIVES AND POTENTIALS authors investigated the trade potential of Armenia for different product groups by employing a gravity model of trade approach. The study explored Armenia's trade flows to 139 countries for the period of 2003 to 2007. According to the results of the paper, the authors concluded that "Armenia has exceeded its export potential almost with all the CIS countries". In addition, the authors concluded that the most perspective product groups of Armenian export tend to be "Industrial products", "Food and beverages" and "Consumer goods". On the other hand, the paper “The effects of exchange rate volatility on exports: evidence from Armenia” analyzes the effect of Armenian floating exchange rate regime and exchange rate volatility on Armenian exports to Russia. According to the paper exchange rate volatility has long-run and short-run negative effects on exports. Moreover, authors stated that high exchange rate risk resulted in decreasing exports to Russia. According to most recent (2019 Jan-Feb compared to 2018 Jan-Feb) ArmStat calculations, biggest growth in export quantities was measured towards Turkmenistan by 23.6 times (from $37K to $912K), Estonia by 15 times (from $8.4K to $136.5K) and Canada by 11.5 times (from $623K to $7.8 mln). Meanwhile, exports to Russia, Germany, USA and UAE dropped. Imports In 2017, Armenia imported $3.96B, making it the 133rd largest importer in the world. During the last five years the imports of Armenia have decreased at an annualized rate of -1.2%, from $3.82B in 2012 to $3.96B in 2017. The most recent imports are led by Petroleum Gas which represent 8.21% of the total imports of Armenia, followed by Refined Petroleum, which account for 5.46%. Armenia's main imports are oil, natural gas, cereals, rubber manufactures, cork and wood, and electrical machinery. Armenia's main imports partners are Russia, China, Ukraine, Iran, Germany, Italy, Turkey, France and Japan. The European Union (28.7% of total exports), Russia (26.9%), Switzerland (14.1%), and Iraq (14.1%) are Armenia's largest export partners (6.3 percent ). The Russian Federation is the most important import partner (26.2%), followed by the EU (22.6%), China (13.8%), and Iran (13.8%). (5.6 percent ). After the 2008 Russian-Georgian conflict, which briefly halted the nation's hydrocarbon supply and exposed the country's energy vulnerabilities, the country has been looking for other energy sources. Tensions with its neighbors, notably Azerbaijan and Turkey, continue to exist, affecting commerce. Armenia's ties to Russia, as well as its membership in the Eurasian Economic Union, constrain the country's potential to integrate further with the EU. Imports in 2017 amounted to $4.183 billion, up 27.8% from 2016. In 2018, the country's structural trade imbalance was predicted to be 15.7 percent of GDP (World Bank). According to World Trade Organization data, Armenia exported commodities worth US$2.4 billion in 2018, up 7% from the previous year, and imported goods worth US$4.9 billion, up 18%. In terms of services, the country exported US$2 billion in 2018 and imported US$2.1 billion. The global economic crisis has had less impact on imports because the sector is more diversified than exports. In the first nine months of 2010, imports grew about 19 percent, just about equal to the decline of the same sector in 2009. Deficit According to the National Statistical Service foreign trade deficit amounted to US$1.94 billion in 2017. The current account deficit represented 2.4 percent of GDP in 2017 and increased up to 8.1 percent of GDP during the first three quarters of 2018. This was a result of about 8 percent increase in goods export and 21 percent increase on goods import in nominal terms year on year in 2018. Armenia's foreign trade turnover increased by 11.6 percent in January–May 2021, compared to an 11.2 percent decline a year earlier, owing to a reversal of the y-o-y dynamics of exports and imports from 8.1 to 12.8 percent decline to 20.8-6.7 percent growth, according to preliminary data from the RA Statistical Committee. As a consequence, Armenia's foreign trade turnover reached 1.5 trillion drams ($2.9 billion), with exports totaling 567.4 billion drams ($1.1 billion) and imports being 931.8 billion drams ($1.8 billion), resulting in a 364.4 billion drams ($695 million) international trade deficit. Foreign trade turnover climbed by 3.9 percent in May 2021,resulting to a 7.9% increase in exports and a minimal 1.5 percent increase in imports. As a consequence, Armenia's international trade deficit in May 2021 was 83.4 billion drams ($160 million), decreasing 7.4% from the same month in 2020. (by 21.1 percent ). Foreign trade turnover increased by 13% year over year in May 2020, due to a 30.7 percent increase in exports and a moderate 4.3 percent increase in imports. Partners European Union In 2022, Armenia's bilateral trade with the EU topped $2.3 billion, making the EU one of Armenia's biggest and most important economic partners. EU-Armenia trade increased by 15% in 2018 reaching a total value of €1.1 billion. In 2017, EU countries accounted for 24.3 percent of Armenia's foreign trade. Whereby exports to EU countries grew by 32,2% to $633 million. In 2010, EU countries accounted for 32.1 percent of Armenia's foreign trade. Germany is Armenia's largest trading partner among EU member states, accounting for 7.2 percent of trade; this is due largely to mining exports. Armenian exports to EU countries have skyrocketed by 65.9 percent, making up more than half of all 2010 January to September exports. Imports from EU countries increased by 17.1 percent, constituting 22.5 percent of all imports. During January–February 2007, Armenia's trade with the European Union totaled $200 million. During the first 11 months of 2006, the European Union remained Armenia's largest trading partner, accounting for 34.4 percent of its $2.85 billion commercial exchange during the 11-month period. Russia and former Soviet republics In the first quarter of 2019, share of Russia in foreign trade turnover fell to 11% from 29% from the previous year. 2017 CIS countries accounted for 30 percent of Armenia's foreign trade. Exports to CIS countries rose by 40,3% to $579,5 million. Bilateral trade with Russia stood at more than $700 million for the first nine months of 2010 – on track to rebound to $1 billion mark first reached in 2008 prior to the global economic crisis. During January–February 2007, Armenia's trade with Russia and other former Soviet republics was $205.6 million (double the amount from the same period the previous year), making them the country's number one trading partner. During the first 11 months of 2006, the volume of Armenia's trade with Russia was $376.8 million or 13.2 percent of the total commercial exchange. China In 2017, trade with China grew by 33.3 percent. As of early 2011, trade with China is dominated by imports of Chinese goods and accounts for about 10 percent of Armenia's foreign trade. The volume of Chinese-Armenian trade soared by 55 percent to $390 million in January–November 2010. Armenian exports to China, though still modest in absolute terms, nearly doubled in that period. Iran Armenia's trade with Iran grew significantly from 2015 and 2020. Because Armenia's land borders to the east and west have been closed by the governments of Turkey and Azerbaijan, domestic firms have looked to Iran as a key economic partner. In 2020, trade between the countries exceeded $300 million. The number of Iranian tourists has risen in recent years, with an estimated 80,000 Iranian tourists in 2010. In January 2021, Iran's finance minister Farhad Dejpasand said that trade between the two countries could reach $1 billion annually as Iran looks to become a regional economic force. United States From January–September 2010, bilateral trade with the United States measured approximately $150 million, on track for about a 30 percent increase over 2009. An increase in Armenia's exports to the US in 2009 and 2010 has been due to shipments of aluminum foil. During the first 11 months of 2006, U.S.-Armenian trade totaled $152.6 million. Georgia The volume of Georgian-Armenian trade remains modest in both relative and absolute terms. According to official Armenian statistics, it rose by 11 percent to $91.6 million in January–November 2010. The figure was equivalent to just over 2 percent of Armenia's overall foreign trade. Turkey In 2019, the volume of bilateral trade with Turkey was about $255 million, with trade taking place across Georgian territory. This figure is not expected to increase significantly so long as the land border between the Armenia and Turkey remains closed. Foreign direct investments Foreign Direct Investment (FDI) into Armenia decreased by US$2.7 million in December 2020, compared to a reduction of US$10.3 million the previous quarter. Armenia Foreign Direct Investment: USD mn Net Flows data is available from March 1993 through December 2020, and is updated quarterly. The statistics ranged from a high of US$425.9 million in December 2008 to a low of -67.6 USD mn in December 2014. Armenia's current account surplus is US$51.7 million in December 2020, according to the most recent statistics. -In June 2021, Armenian Direct Investment Abroad increased by 12.8 million dollars. -In June 2021, it boosted its Foreign Portfolio Investment by $14.6 million. -In December 2020, the country's nominal GDP was reported to be 3.8 billion dollars. Yearly FDI figures Despite robust economic growth foreign direct investment (FDI) in Armenia remain low as of 2018. in January–September 2019, the net flow of direct foreign investment in the real sector of the Armenian economy stood at about $267 million. Jersey was the main source of FDI in 2017. Moreover, combined net FDI from all other sources was negative, indicating capital outflow. The tax haven Jersey is home to an Anglo-American company, Lydian International, which is currently building a controversial massive gold mine in the southeastern Vayots Dzor province. Lydian has pledged to invest a total of $370 million in the Amulsar gold mine. Negative values indicate investments of Armenian corporations to foreign country exceeding investments from that country in Armenia. Stock FDI FDI stock to GDP ratio grew continuously during 2014-2016 and reached 44.1% in 2016, surpassing average figures for Commonwealth of Independent States countries, transition economies and the world. By the end of 2017 stock net FDI (for the period 1988–2017) reached 1824 billion AMD, while gross flow of FDI for the same period reached 3869 billion AMD. As of February 2019, the European Investment Bank (EIB) has invested about 380 million euros in the various projects implemented in Armenia. FDI in founding capital of financial institutions During the sector consolidation process in 2014-2017 the share of foreign capital in the authorized capital of the Armenian commercial banks decreased from 74,6% to 61,8%. Net FDI in founding capital of financial institutions accumulated by end of September 2017 is presented in pie chart below. Foreign aid United States The Armenian government receives foreign aid from the government of the United States through the United States Agency for International Development and the Millennium Challenge Corporation. On March 27, 2006, the Millennium Challenge Corporation signed a five-year, $235.65 million compact with the Government of Armenia. The single stated goal of the "Armenian Compact" is "the reduction of rural poverty through a sustainable increase in the economic performance of the agricultural sector." The compact includes a $67 million to rehabilitate up to 943 kilometers of rural roads, more than a third of Armenia's proposed "Lifeline road network". The Compact also includes a $146 million project to increase the productivity of approximately 250,000 farm households through improved water supply, higher yields, higher-value crops, and a more competitive agricultural sector. In 2010, the volume of US assistance to Armenia remained near 2009 levels; however, longer-term decline continued. The original Millennium Challenge Account commitment for $235 million had been reduced to about $175 million due to Armenia's poor governance record. Thus, the MCC would not complete road construction. Instead, the irrigated agriculture project was headed for completion with apparently no prospects for extension beyond 2011. On May 8, 2019, conditioned with the political events in Armenia since April 2018, United States Agency for International Development signed an extension of U.S.-Armenia bilateral agreement in the area of governance and public administration, which would add additional US$8.5 million to the agreement. By signing another document on the same day, USAID increased the aid by additional US$7.5 million in support for more competitive and diversified private sector in Armenia. The financial allocations will be directed to the financing of the USAID-funded project in infrastructures, agriculture, tourism․ After the signing of the new bilateral agreements, the total amount of the U.S. grants to Armenia amounted to around US$81 million. European Union According to the agreement signed in 2020 EU will provide Armenia with 65 million euros for implementation of three programs in such areas as energy efficiency, environment and community development and formation of tools for implementation of the Comprehensive and Enhanced Partnership Agreement. With curtailment of the MCC funding, the European Union may replace the US as Armenia's chief source of foreign aid for the first time since independence. From 2011 to 2013, the European Union is expected to advance at least €157.3 million ($208 million) in aid to Armenia. Domestic business environment Since transition of power to new leadership in 2018 Armenian government works on improving domestic business environment. Numerous formerly privileged business are now required to pay taxes and officially register all workers. Mainly due to this there were 9.7% more payroll employees registered in January 2019 as compared to January 2018. In April 2019 Armenian parliament approved reforms of management of joint stock companies effectively enacting a blocking minority shareholders stake of 25% to cope with shareholder oppression. Following the advice of economic advisers who cautioned Armenia's leadership against the consolidation of economic power in the hands of a few, in January 2001, the Government of Armenia established the State Commission for the Protection of Economic Competition. Its members cannot be dismissed by the government. Foreign trade facilitation In June 2011, Armenia adopted a Law on Free Economic Zones (FEZ), and developed several key regulations at the end of 2011 to attract foreign investments into FEZs: exemptions from VAT (value added tax), profit tax, customs duties, and property tax. The “Alliance” FEZ was opened in August 2013, and currently has nine businesses taking advantage of its facilities. The focus of “Alliance” FEZ is on high-tech industries which include information and communication technologies, electronics, pharmaceuticals and biotechnology, architecture and engineering, industrial design and alternative energy. In 2014, the government expanded operations in the Alliance FEZ to include industrial production as long as there is no similar production already occurring in Armenia. In 2015, another “Meridian” FEZ, focused on jewelry production, watch-making, and diamond-cutting opened in Yerevan, with six businesses operating in it. The investment programs for these companies must still be approved by government. The Armenian Government approved the program to construct the Meghri free economic zone at the border with Iran, which is expected to open in 2017. Controversial issues Monopolies Major monopolies in Armenia include: Natural gas import and distribution, held by Gazprom Armenia, formerly named ArmRosGazprom (controlled by Russian monopoly Gazprom) Armenia's railway, South Caucasus Railway, owned by Russian Railways (RZD) Electricity transmission and distribution (see Electricity sector in Armenia) Newspaper distribution, held by Haymamul Former notable monopolies in Armenia : Wireless (mobile) telephony, held by Armentel until 2004 Internet access, held by Armentel until September 2006 Fixed-line telephony, held by Armentel until August 2007 Assumed (unofficial) monopolies until 2018 velvet revolution: Oil import and distribution (claimed by Armenian opposition parties to belonging to a handful of government-linked individuals, one of which - "Mika Limited" - is owned by Mikhail Baghdasarian, while the other - "Flash" - is owned by Barsegh Beglarian, a "prominent representative of the Karabakh clan") Aviation kerosene (supplying to Zvartnots airport), held by Mika Limited Various basic foodstuffs such as rice, sugar, wheat, cooking oil and butter (the Salex Group enjoys a de facto monopoly on imports of wheat, sugar, flour, butter and cooking oil. Its owner was a parliament deputy Samvel Aleksanian (a.k.a. "Lfik Samo") and close to the country's leadership.). According to one analyst, Armenia's economic system in 2008 was anticompetitive due to the structure of the economy being a type of "monopoly or oligopoly". "The result is the prices with us do not drop even if they do on international market, or they do quite belated and not to the size of the international market." According to 2008 estimate of a former prime minister, Hrant Bagratyan, 55 percent of Armenia's GDP is controlled by 44 families. In early 2008, the State Commission for the Protection of Economic Competition named 60 companies having "dominant positions" in Armenia. In October 2009, when visiting Yerevan, the World Bank’s managing director, Ngozi Okonjo-Iweala, warned that Armenia will not reach a higher level of development unless its leadership changes the "oligopolistic" structure of the national economy, bolsters the rule of law and shows "zero tolerance" towards corruption. "I think you can only go so far with this economic model," Ngozi Okonjo-Iweala told a news conference in Yerevan. "Armenia is a lower middle-income country. If it wants to become a high-income or upper middle-income country, it can not do so with this kind of economic structure. That is clear." She also called for a sweeping reform of tax and customs administration, the creation of a "strong and independent judicial system" as well as a tough fight against government corruption. The warning was echoed by the International Monetary Fund. Takeover of Armenian industrial property by the Russian state and Russian companies Since 2000, the Russian state has acquired several key assets in the energy sector and Soviet-era industrial plants. Property-for-debt or equity-for-debt swaps (acquiring ownership by simply writing off the Armenian government's debts to Russia) are usually the method of acquiring assets. The failure of market reforms, clan-based economics, and official corruption in Armenia have allowed the success of this process. In August 2002, the Armenian government sold an 80 percent stake in the Armenian Electricity Network (AEN) to Midland Resources, a British offshore-registered firm which is said to have close Russian connections. In September 2002, the Armenian government handed over Armenia's largest cement factory to the Russian ITERA gas exporter in payment for its $10 million debt for past gas deliveries. On November 5, 2002, Armenia transferred control of 5 state enterprises to Russia in an assets-for-debts transaction which settled $100 million of Armenian state debts to Russia. The document was signed for Russia by Prime Minister Mikhail Kasyanov and Industry Minister Ilya Klebanov, while Prime Minister Andranik Markarian and National Security Council Secretary Serge Sarkisian signed for Armenia. The five enterprises which passed to 100 percent Russian state ownership are: Armenia's largest thermal gas-burning power plant, which is in the town of Hrazdan "Mars" — electronics and robotics plant in Yerevan, a Soviet-era flagship for both civilian and military production three research-and-production enterprises — for mathematical machines, for the study of materials, and for automated control equipment — these being Soviet-era military-industrial plants In January 2003, the Armenian government and United Company RUSAL signed an investment cooperation agreement, under which United Company RUSAL (which already owned a 76% stake) acquired the Armenian government's remaining 26% share of RUSAL ARMENAL aluminum foil mill, giving RUSAL 100% ownership of RUSAL ARMENAL. On November 1, 2006, the Armenian government handed de facto control of the Iran-Armenia gas pipeline to Russian company Gazprom and increased Gazprom's stake in the Russian-Armenian company ArmRosGazprom from 45% to 58% by approving an additional issue of shares worth $119 million. This left the Armenian government with a 32% stake in ArmRosGazprom. The transaction will also help finance ArmRosGazprom's acquisition of the Hrazdan electricity generating plant’s fifth power bloc (Hrazdan-5), the leading unit in the country. In October 2008 the Russian bank Gazprombank, the banking arm of Gazprom, acquired 100 percent of Armenian bank Areximbank after previously buying 80 percent of said bank in November 2007 and 94.15 percent in July of the same year. In December 2017 government transferred natural gas distribution networks in cities Meghri and Agarak to Gazprom Armenia for cost-free use. Construction of these was funded by foreign aid and costed about 1.3 billion AMD. Non-transparent deals Critics of the Robert Kocharyan government (in office until 2008) say that the Armenian administration never considered alternative ways of settling the Russian debts. According to economist Eduard Aghajanov, Armenia could have repaid them with low-interest loans from other, presumably Western sources, or with some of its hard currency reserves which then totaled about $450 million. Furthermore, Aghajanov points to the Armenian government's failure to eliminate widespread corruption and mismanagement in the energy sector – abuses that cost Armenia at least $50 million in losses each year, according to one estimate. Political observers say that Armenia's economic cooperation with Russia has been one of the least transparent areas of the Armenian government's work. The debt arrangements have been personally negotiated by (then) Defense Minister (and later President) Serge Sarkisian, initially Kocharyan's closest political associate. Other top government officials, including former Prime Minister Andranik Markarian, had little say on the issue. Furthermore, all of the controversial agreements have been announced after Sarkisian's frequent trips to Moscow, without prior public discussion. Finally, while Armenia is not the only ex-Soviet state that has incurred multi-million-dollar debts to Russia over the past decades, it is the only state to have so far given up such a large share of its economic infrastructure to Russia. For example, pro-Western Ukraine and Georgia (both of which owe Russia more than Armenia) have managed to reschedule repayment of their debts. Transportation routes and energy lines Internal Since early 2008, Armenia's entire rail network is managed by the Russian state railway under brand South Caucasus Railways. Metros Yerevan Metro was launched in 1981. It serves 11 active stations. Buses Yerevan Central Bus Station, also known as Kilikia Bus Station, is Yerevan's primary bus terminal, linking buses to both domestic and foreign destinations. Roadways Total length: 8,140 km, World ranking: 112 (7,700 km paved including 1561 km of expressways). Through Georgia Russian natural gas reaches Armenia via a pipeline through Georgia. The only operational rail link into Armenia is from Georgia. During Soviet times, Armenia's rail network connected to Russia's via Georgia through Abkhazia along the Black Sea. However, the rail link between Abkhazia and other Georgian regions has been closed for a number of years, forcing Armenia to receive rail cars laden with cargo only through the relatively expensive rail-ferry services operating between Georgian and other Black Sea ports. The Georgian Black Sea ports of Batumi and Poti process more than 90 percent of freight shipped to and from landlocked Armenia. The Georgian railway, which runs through the town of Gori in central Georgia, is the main transport link between Armenia and the aforementioned Georgian seaports. Fuel, wheat and other basic commodities are transported to Armenia by rail. Armenia's main rail and road border-crossing with Georgia (at ) is at the Debed river near the Armenian town of Bagratashen and the Georgian town of Sadakhlo. The Upper Lars border crossing (at Darial Gorge) between Georgia and Russia across the Caucasus Mountains serves as Armenia's sole overland route to the former Soviet Union and Europe. It was controversially shut down by the Russian authorities in June 2006, at the height of a Russian-Georgian spy scandal. Upper Lars is the only land border crossing that does not go through Georgia's Russian-backed breakaway regions of South Ossetia and Abkhazia. The other two roads linking Georgia and Russia run through South Ossetia and Abkhazia, effectively barring them to international traffic. Through Iran A new gas pipeline to Iran has been completed, and a road to Iran through the southern city of Meghri allows trade with that country. An oil pipeline to pump Iranian oil products is also in the planning stages. As of October 2008, the Armenian government was considering implementing an ambitious project to build a railway to Iran. The 400 kilometer railway would pass through Armenia's mountainous southern province of Syunik, which borders Iran. Economic analysts say that the project would cost at least $1 billion (equivalent to about 40 percent of Armenia's 2008 state budget). As of 2010, the project has been continuously delayed, with the rail link estimated to cost as much as $4 billion and stretch . In June 2010, Transport Minister Manuk Vartanian revealed that Yerevan is seeking as much as $1 billion in loans from China to finance the railway's construction. Through Turkey and Azerbaijan The border closures by Turkey and Azerbaijan have severed Armenia's rail link between Gyumri and Kars; the rail link with Iran through the Azeri exclave of Nakhichevan; and a natural gas and oil pipeline with Azerbaijan. Also closed are road links with Turkey and Azerbaijan. Despite the economic blockade of Turkey on Armenia, every day dozens of Turkish trucks laden with goods enter Armenia through Georgia. In 2010, it was confirmed that Turkey will keep the border closed for the foreseeable future after the Turkey-Armenia normalization process collapsed. Labor market Labor occupation According to the 2018 HDI statistical update, Armenia had the highest percentage of employment in services (49.7%) and lowest share in agriculture (34.4%) among the South Caucasus countries. Unionization In 2018, about 30% of wage workers were organized in unions. At the same time, rate of unionization was dropping at average rate of 1% since 1993. Monthly wages According to preliminary figures from Statistical Committee of Armenia monthly wages averaged to 172 thousand AMD in February 2019. It is estimated that wages rise at 0.8% for each additional year of experience and "the ability to solve problems and learn new skills yields a wage premium of nearly 20 percent". Unemployment It is reported that in 2020 there was a drop in the unemployment rate in Armenia from 16.99% in 2019 to 16.63% in 2020. The Statistical Committee of Armenia reported that In 2020, the unemployment rate has been volatile reaching to 19.8% during the first quarter of the year and then decreasing to 16% during the fourth quarter. According to the latest reports on population of Armenia, in December 2020 the population consisted of 2.96million people and the average monthly earning during February 2021 was US$366.05. According to prime minister Nikol Pashinyan in January 2019 562,043 payroll jobs were recorded, against of 511,902 in January 2018, an increase of 9.7%.Statistical Committee of Armenia publication based on data retrieved from employers and national income service cites 560,586 payroll positions in January 2019, an increase of 9.9% against previous year. This however does not match survey data published by the Statistical Committee of Armenia, according to which in 4th quarter of 2018 there were 870.1 thousand persons employed against 896.7 thousand employed persons in 4th quarter of 2017. The mismatch was highlighted by former PM Hrant Bagratyan. For the whole year of 2018 Statistical Committee of Armenia survey counted 915.5 thousand employed persons, an increase of 1.4% against previous year. In the same period unemployment rate of economically active population dropped from 20.8% to 20.4%. The unemployment rate increased to 19% in 2018 before dropping to 18.3% in 2019 and 18.2% in 2020, having remained basically unchanged since 2009. At the same time, an estimated 60% of workers were employed in the informal economy in 2019. The strong economic growth of 2021 and 2022 led to a significant drop in unemployment to 15.3% and 13% respectively, causing a substantial reduction in the proportion of the population living below the World Bank upper-middle income economy poverty threshold of $6.85 per day, from 51.7% in 2021 to 37.6% in 2023. World Bank research also reveals that employment rate fell in years 2000–2015 in middle- and low-skill occupations, while it grew high-skill occupations. See also Statistical Committee of Armenia publication (in English) "Labour market in the Republic of Armenia, 2018". Female unemployment in Armenia Worldwide, women's unemployment rate is higher than men's by approximately 0.8% and equals 6%. According to International Labor Organization, Armenia has the highest women's unemployment rate in post-Soviet countries, equaling 17.3% for women above 25. If we compare this rate to those of the neighboring countries (Latvia: 8.6%, Georgia: 7.7%, Azerbaijan: 4.8%), we can see that it is very high. In 2017, the National Statistical Service of Armenia stated that more than 60% of officially registered unemployed people in Armenia are women. One of the lecturers of Yerevan State University, Ani Kojoyan, mentioned that even though there is no issue in the legislation that becomes a reason for women's unemployment; however, there are some issues that are not mentioned in the legislation. Some of those issues are the fact that potential employers consider women's marital status, how many children they have, or if they are planning to get pregnant any time soon. Moreover, some women are not allowed to work by their husbands after graduating from higher educational institutions. She mentions that the most crucial problem affecting this phenomenon is the fact women do not stand up for their rights. It is also mentioned that according to various sources, there is an inequality in men's and women's monthly wages. In all the sectors, the average monthly salary of men is much higher than women even with the same years of education. It is stated that eliminating the discrimination between two genders would positively impact the country's economy. Ani Kojoyan mentions that this is a crucial problem for the economy except for being a women's rights violation. Thus, the Armenian government should take care that unemployed women can find jobs and become taxpayers. Migrant workers Since gaining independence in 1991, hundreds of thousands of Armenia's residents have gone abroad, mainly to Russia, in search of work. Unemployment has been the major cause of this massive labor emigration. OSCE experts estimate that between 116,000 and 147,000 people left Armenia for economic reasons between 2002 and 2004, with two-thirds of them returning home by February 2005. According to estimates by the National Statistical Survey, the rate of labor emigration was twice as higher in 2001 and 2002. According to an OSCE survey, a typical Armenian migrant worker is a married man aged between 41 and 50 years who "began looking for work abroad at the age of 32-33." For Armenians, another feature of migration was an increase in a variety of threats. The journey itself was extremely dangerous. To pay their way, may departing migrants took out loans failed, the whole family's future was put at a risk. As a consequence, the practice of delaying or refusing to pay part or all of a migrant workers wages has become common. The risks were also heightened by many emigrants failure. This type of migration inherited almost all of the negative characteristics that described pre-transition labor migration. During the workshop, participants addressed the increasing importance of migration as a growth factor, as well as the significance of SDG Target 10.7 on anticipated and well-managed migration policies for Armenia. Natural environment protection Environmental Project Implementation Unit implements projects related to Natural environment protection. Armenia's greenhouse gas emissions decreased 62% from 1990 to 2013, averaging -1.3% annually. Armenia is working on addressing its environmental problems. Ministry of Environment has introduced a pollution fee system by which taxes are levied on air and water emissions and solid waste disposal. See also Armenia Securities Exchange Diamond industry in Armenia Eurasian Economic Union Geographical Issues in Armenia List of banks in Armenia List of companies of Armenia Mercantilism in Armenia Notes Sources Books External links Investment Council of Armenia Fund for Rural Economic Development Armenia Securities Exchange Armenia Armenia	24
This article considers transport in Armenia. Railways Total in common carrier service; does not include industrial lines Broad gauge 825 km of gauge (825 km electrified) (1995) There is no service south of Yerevan. City with metro system: Yerevan International links Azerbaijan - closed - same gauge Georgia - yes - same gauge Iran - via Azerbaijan - closed - break of gauge - / Turkey - closed - break of gauge -/ Most of the cross-border lines are currently closed due to political problems. However, there are daily inbound and outbound trains connecting Tbilisi and Yerevan. Departing from Yerevan railway station trains connect to both Tbilisi and Batumi. From neighboring Georgia, trains depart to Yerevan from Tbilisi railway station. Within Armenia, new electric trains connect passengers from Yerevan to Armenia's second-largest city of Gyumri. The new trains run four times a day and the journey takes approximately two hours. There is also discussion to establish a rail link between Yerevan and Tehran. Armenia is pursuing funding from the Asian Development Bank to launch the construction of this infrastructure project. The completion of the project could establish a major commodities transit corridor and would serve as the shortest transportation route between Europe and the Persian Gulf. In June 2019, Iranian president Hassan Rouhani backed this project and stated that “we want the Persian Gulf and the Gulf of Oman to be connected to the Black Sea, and one of the ways to make this happen is through Iran, Armenia and Georgia.” Metros The capital city of Armenia, Yerevan, is serviced by the Yerevan Metro. The system was launched in 1981, and like most former Soviet Metros, its stations are very deep (20–70 meters underground) and intricately decorated with national motifs. The metro runs on a 13.4 kilometers (8.3 mi) line and currently serves 10 active stations. Trains run every five minutes from 6:30 a.m. until 11 p.m. local AMT time. As of 2017, the annual ridership of the metro is 16.2 million passengers. Free Wi-Fi is available at all stations and some trains. Buses International connections Land borders are open with both Georgia and Iran. Yerevan Central Bus Station, also known as Kilikia Bus Station is the main bus terminal in Yerevan with buses connecting to both internal and international destinations. There are daily bus connections between Yerevan and Tbilisi and Yerevan and Tehran. Approximately three times daily, buses depart from Yerevan Central Bus Station to Stepanakert, the capital of the partially recognized state of Artsakh. There are also scheduled bus routes which connect Yerevan with Kyiv, Moscow, Saint Petersburg as well as several other cities across Russia. It is also possible to connect to Chișinău Moldova, Minsk Belarus and other cities in Eastern Europe from Yerevan through connecting bus routes via Georgia and Ukraine. In addition, there is a once a week bus service to Istanbul via Georgia. In June 2019, a new bus route from Baghdad to Yerevan via Iran began. Local connections The Armenian bus network connects all major cities, towns, and villages throughout the country. In larger cities and towns such as Yerevan, Gyumri, Vanadzor and Armavir, bus stations are equipped with a waiting room and a ticket office, in other towns bus stations may not have shelters. Most of the routes are operated by GAZelle minivans with a capacity of 15 passengers, some routes are operated by soviet bus producer LiAZ (Russia). Yerevan itself has a large integrated bus network, with a newly acquired bus fleet, passengers are able to connect from one end of the city to the other. Wi-Fi is available on most city buses. Despite this, buses often have difficulty meeting the demand for capacity, mainly in Yerevan, where vehicles are typically overcrowded. There are no night services between 11 p.m. and 6 a.m. There is no ticket system in the country, passengers pay in cash to drivers. Passengers on the national bus network pay before boarding, passengers on the Yerevan bus network pay after the ride, while leaving the vehicle. Timetables and fares are published on Transport for Armenia. From Yeritasardakan metro station in downtown Yerevan, travelers can take the 201 airport shuttle, which goes directly to Zvartnots International Airport, which takes approximately 20 minutes from the city center. Roadways Since independence, Armenia has been developing its internal highway network. The "North-South Road Corridor Investment Program" is a major infrastructure project which aims at connecting the southern border of Armenia with its northern by means of a 556 km-long Meghri-Yerevan-Bavra highway. It is a major US$1.5 billion infrastructure project funded by the Asian Development Bank, European Investment Bank and the Eurasian Development Bank. When completed, the highway will provide access to European countries via the Black Sea. It could also eventually interconnect the Black Sea ports of Georgia with the major ports of Iran, thus positioning Armenia in a strategic transport corridor between Europe and Asia. Armenia is pursuing further loans from China as part of the Belt and Road Initiative to complete the north–south highway. Armenia connects to European road networks via the International E-road network through various routes such as; European route E117, European route E691, European route E001 and European route E60. Armenia also connects to the Asian Highway Network through routes AH81, AH82 and AH83. The number of insured registered cars in Armenia has grown from 390,457 in 2011 to 457,878 in 2015. Total 8,140 km World Ranking: 112 Paved 7,700 km (including 1,561 km of expressways) Unpaved 0 km (2006 est.) Pipelines Natural gas 3,838 km (2017) Ports and harbors Cargo shipments to landlocked Armenia are routed through ports in Georgia and Turkey. Airports Air transportation in Armenia is the most convenient and comfortable means of getting into the country. There are large international airports that accept both external and domestic flights throughout the Republic. As of 2020, 11 airports operate in Armenia. However, only Yerevan's Zvartnots International Airport and Gyumri's Shirak Airport are in use for commercial aviation. There are three additional civil airports currently under reconstruction in Armenia, including Syunik Airport, Stepanavan Airport, and Goris Airport. The leading Armenian airlines in operation are Armenia Aircompany and Armenia Airways. There are plenty of air connections between Yerevan and other regional cities, including Athens, Barcelona, Beirut, Berlin, Bucharest, Brussels, Damascus, Doha, Dubai, Istanbul, Kyiv, Kuwait City, London, Milan, Minsk, Moscow, Paris, Prague, Riga, Rome, Tehran, Tel-Aviv, Tbilisi, Vienna, Venice, and Warsaw, as well as daily connections to most major cities within the CIS region. Statistics show that the number of tourists arriving in the country by air transportation increases yearly. In 2018, passenger flow at the two main airports of Armenia reached a record high of 2,856,673 million people. In December 2019, yearly passenger flow exceeded 3,000,000 million people for the first time in Armenia's history. In November 2019, the creation of a Free Route Airspace (FRA) between Armenia and Georgia was announced. The process has been carried out through the joint efforts of the General Department of Civil Aviation of Armenia, the Georgian Civil Aviation Administration and Eurocontrol. The Free Route Airspace between the two South Caucasus countries will increase flights to around 40,000 annually. Country comparison to the world: 153 Airports - with paved runways Total: 10 Over 3,047 m (9,900 feet): 2 1,524 to 2,437 m (7,920 feet): 2 914 to 1,523 m (4,950 feet): 4 Under 914 m: 2 (as of 2008) Airports - with unpaved runways Total: 1 1,524 to 2,437 m: 0 914 to 1,523 m: 1 under 914 m: 0 (as of 2008) Heliports Armenia maintains a number of both military and civilian heliports. The main military heliport is located on the premises of Erebuni Airport in Yerevan. Meanwhile, the company Armenian Helicopters, based at Zvartnots Airport in Yerevan, offers charter flights within Armenia and to certain neighboring countries, including Georgia, Russia, and Turkey. Helicopter services are delivered with the US-made Robinson R66 and the European AIRBUS EC130T2 choppers. Flights can be carried out as scheduled or on individual routes. Aerial tramways The Wings of Tatev is currently the world's longest reversible aerial tramway which holds the record for longest non-stop double-track cable car and is located in the town of Halidzor. In October 2019, it was announced that investors were interested in creating an aerial tramway in the capital, Yerevan. International transport agreements Armenia cooperates in various international transport-related organizations and agreements, including the following: Eurocontrol European Aviation Safety Agency (Pan-European Partner) European Civil Aviation Conference European Common Aviation Area International Civil Aviation Organization International Road Transport Union International Transport Forum International Union of Railways (Associate member) Montreal Convention TIR Convention TRACECA Trans-European Transport Networks See also Economy of Armenia General Department of Civil Aviation of Armenia Ministry of Transport and Communication (Armenia) Tourism in Armenia Transport in Europe Transport in Georgia (country) Transport in the Nagorno-Karabakh Republic Transport in the Soviet Union References External links	5
The Armed Forces of Armenia (), sometimes referred to as the Armenian Army (), is the national military of Armenia. It consists of personnel branches under the General Staff of the Armenian Armed Forces, which can be divided into two general branches: the Ground Forces, and the Air Force. Although it was partially formed out of the former Soviet Army forces stationed in the Armenian SSR (mostly units of the 7th Guards Army of the Transcaucasian Military District), the military of Armenia can be traced back to the founding of the First Republic of Armenia in 1918. Being a landlocked country, Armenia has no navy. The Commander-in-Chief of the military is the President of Armenia, Vahagn Khachaturyan. The Ministry of Defence is in charge of political leadership, headed by Suren Papikyan, while military command remains in the hands of the general staff, headed by the Chief of Staff, who is Major-General Eduard Asryan. Border guards subject to the Ministry of Defence until 2001, patrol Armenia's borders with Georgia and Azerbaijan, while Russian troops continue to monitor its borders with Iran and Turkey. Since 2002, Armenia has been a member of the Collective Security Treaty Organization. Armenia signed a military cooperation plan with Lebanon on 27 November 2015. History Early Armenian Army An Armenian military corps was established to fight against the Ottomans during the Turkish–Armenian War in early 1918. In accordance with the Treaty of Batum of 4 June 1918 the Ottoman Empire demobilized most of the Armenian army. Ethnic Armenian conscripts and volunteers in the Imperial Russian Army would later become the core of the military of the First Armenian Republic. Soviet era The 7th Guards Army was based in Yerevan from 1946 to 1992. In the late 1980s the Army consisted of: Directorate – Yerevan 15th Motor Rifle Division – Kirovakan (now Vanadzor) 75th Motor Rifle Division – Nakhichevan 127th Motor Rifle Division – Leninakan (now Gyumri) 164th Motor Rifle Division – Yerevan On 1 June 1992, ITAR-TASS reported that General Fyodor Reut said that some units of the 7th Guards Army would begin leaving Armenia in 10–15 days. The army was disbanded later that summer. The former Soviet Air Defense Forces in Armenia were drawn from the 14th Air Defense Corps of the 19th Separate Air Defense Army. 1988–1992 The modern Armenian military entered its first stage at the beginning of the Nagorno-Karabakh conflict, when Armenian militias were formed to combat Azerbaijani units in Artsakh. On 20 September 1990, the first military unit was created, the Yerevan Special Regiment, with the first oath being held in the Republican Assembly Point and was attended by the first President of Armenia Levon Ter-Petrosyan, Prime Minister Vazgen Manukyan, and defence minister Vazgen Sargsyan. Five battalions were also formed in Ararat, Goris, Vardenis, Ijan and Meghri. In 1991, by the decision of the government, the State Committee of Defense under the Council of Ministers, which facilitated the task of coordinating the defense operations of Armenia, becoming the basis on which the Ministry of Defense was to be established later on. Post-1992 Armenia established a Ministry of Defence on 28 January 1992. The first military unit of the defence ministry to be formed was the 1st Airborne Regiment, where the first Armenian soldier took the oath to the nation that March. Since a significant part of the officers of the Armed Forces were fighters of the self-defense volunteer detachments, a center for raising the qualification of officers was established for their qualification and training, which during its activity it provided about 1,500 officer-graduates. The School of Non-Commissioned Officers produced about 1,000 graduates. The Treaty on Conventional Armed Forces in Europe was ratified by the Armenian parliament in July 1992. The treaty establishes comprehensive limits on key categories of military equipment, such as tanks, artillery, armored combat vehicles, combat aircraft, and combat helicopters, and provides for the destruction of weaponry in excess of those limits. Armenian officials have consistently expressed determination to comply with its provisions and thus Armenia has provided data on armaments as required under the CFE Treaty. Despite this, Azerbaijan accuses Armenia of diverting a large part of its military forces to Nagorno-Karabakh and thus circumventing these international regulations. In March 1993, Armenia signed the multilateral Chemical Weapons Convention, which calls for the eventual elimination of chemical weapons. Armenia acceded to the nuclear Non-Proliferation Treaty as a non-nuclear weapons state in July 1993. In addition to the branches of services listed above, Armenia established its own Internal Troops from the former Soviet Interior Troops after the dissolution of the Soviet Union. Up until December 2002, Armenia maintained a Ministry of Internal Affairs, but along with the Ministry of National Security, it was reorganized as a non-ministerial institution. The two organizations became the Police of Armenia and the National Security Service. Organization and service branches The Armenian Armed Forces are Headquartered in Yerevan, where most of the general staff is based. The general staff is responsible for operational command of the Armenian Military and its two major branches. The armed forces also has the following personnel branches: Department of Military Preparedness Department of Military Apparatus Department of Aviation Department of Missile Troops Department of Air Defence Department of Rear Services Department of Signal Troops Department of the Engineer Troops Department of Armaments Department of the RNBC Defence Troops Medical Department Personnel Department Intelligence Department Strategic Planning Department Mobilization Department Operative Department Department of Military Service Security Department of Military Commissars Financial Department Human Resources Department Ground Forces According to IISS 2010, Armenia has 20 T-80 tanks, 137 T-72 tanks, 8 T-54/55 tanks and 80 BMP-1's, 7 BMP-1K, 55 BMP-2 and 12 BRM-1K. Wheeled APCs reported included 11 BTR-60s, 21 BTR-70s, 4 BTR-80s, 145 MT-LBs, 5 BMD-1S, and 120 BRDM-2 scout vehicles. Although the Russians have supplied newer equipment to Armenia over the years, the numbers have never been sufficient to upgrade all ground force formations and many of the lower readiness units still have older, Soviet-legacy systems that have not been upgraded or in many cases effectively maintained. These older systems are placing great demands on the logistics system for service, maintenance, replacement parts and necessary upgrades, costing the army both financially and in overall readiness. The ground force is engaged in an effort of reassessment, reorganisation and restructuring, as the future of Armenia's defence needs a revised force structure and unit mix. The army sees the need to maintain much of its traditional mechanised formations, but is looking to lighten and make more mobile and self-sustainable a small number of other formations. It must develop these newer formations to support its international requirements and effectively operate in mountainous and other rugged terrain, but it must do this without affecting the mechanised capability that is needed to confront Azerbaijan's conventional forces. Since the fall of the Soviet Union, Armenia has followed a policy of developing its armed forces into a professional, well trained, and mobile military. In 2000, the Centre for International Studies and Research reported that at that time the Armenian Army had the strongest combat capability of the three South Caucasus countries' armies (the other two being Georgia and Azerbaijan). CSTO Secretary, Nikolay Bordyuzha, came to a similar conclusion after collective military drills in 2007 when he stated that, "the Armenian Army is the most efficient one in the post-Soviet space". This was echoed more recently by Igor Korotchenko, a member of the Public Council, Russian Ministry of Defense, in a March 2011 interview with Voice of Russia radio. The Army is functionally divided into Active and Reserve Forces. Their main functions include deterrence, defense, peace support and crisis management, humanitarian and rescue missions, as well as social functions within Armenian society. The Active Forces mainly have peacekeeping and defensive duties, and are further divided into Deployment Forces, Immediate Reaction, and Main Defense Forces. The Reserve Forces consists of Enhancement Forces, Territorial Defense Forces, and Training Grounds. They deal with planning and reservist preparation, armaments and equipment storage, training of formations for active forces rotation or increase in personnel. During peacetime the Army maintains permanent combat and mobilization readiness. They become part of multinational military formations in compliance with international treaties Armenia is a signatory to, participate in the preparation of the population, the national economy and the maintenance of wartime reserves and the infrastructure of the country for defense. In times of crisis the Army's main tasks relate to participation in operations countering terrorist activities and defense of strategic facilities (such as nuclear power plants and major industrial facilities), assisting the security forces in proliferation of weapons of mass destruction, illegal armaments traffic and international terrorism. In case of low- and medium-intensity military conflict the Active Forces that are part of the Army participate in carrying out the initial tasks for the defense of the territorial integrity and sovereignty of the country. In case of a high intensity conflict the Land Forces, together with the Air Force, Air Defense and Border Guards, form the defense group of the Armenian Armed Forces aiming at countering aggression and protect the territorial integrity and sovereignty of the country. Experiments in developing small arms have been undertaken in Armenia, producing the K-3 assault rifle, but Jane's Infantry Weapons estimates that the program has ceased, and the rifle is not in widespread service with the army. The AK-74 is the standard issue rifle of the Armenian Army with older AKMs in reserve use. Beside AK rifles Armenian forces use mostly Russian small arms like the Makarov pistol, SVD sniper rifle, and the PKM general purpose machine gun. Air Force and Air Defense The Armenian Air Force consists of 15 Su-25 ground attack planes, 18 Su-30 jet fighters, 1 Mig 25, 16 Mil Mi-24 helicopter gunships, 6 L-39 trainer and attack aircraft, 16 Yak-52 trainer aircraft, 3 Il-76 cargo planes, 18 Mil Mi-8 transport helicopters, and 10 Mil Mi-2 light utility helicopters. There are an additional 18 MiG-29 fighter jets of the Russian 102nd Military Base stationed in Gyumri. The Armenian anti-aircraft branch was equipped and organized as part of the military reform program of Lieutenant-General Norat Ter-Grigoryants. It consists of an anti-aircraft missile brigade and two regiments armed with 100 anti-aircraft complexes of various models and modifications, including the SA-8, Krug, S-75, S-125, SA-7, SA-10, SA-13, SA-16 and SA-18. Russia has SA-6 and S-300 long range surface-to-air missiles at the Russian 102nd Military Base. There are also 24 Scud ballistic missiles with eight launchers. Numerical strength is estimated at 3,000 servicemen, with plans for further expansion. In late December 2010, the Armenian Defense Minister, Seyran Ohanyan, officially acknowledged that the army are equipped with the Russian-made S-300 surface-to-air missiles. The statement was made while the Minister was inspecting a new air-defense command point that maintains "state-of-the-art equipment" built specifically for the operation of the S-300's. Russian specialist started to train Armenian teams on sophisticated Missiles and Defensive Systems. The S-300 was paraded for the first time in the 2011 Parade and the only S-300 missile system (SA10 Grumble) which likes mobility. The S-300 is the main Air Defensive system that protects Armenia's air security. In the 2016 Armenian Parade celebrating the Armenian Independence BUK-M2 Air Defense Systems were shown. These systems were not part of the 200 million dollar contract agreement between Yerevan and Moscow but an agreement between CSTO partners. Other devices such as stem of electronic warfare (EW) "Infauna" and P-325U consist in the Armenian Armed Forces. Military of Artsakh In addition to forces mentioned above, there are around 20,000 active soldiers defending Nagorno-Karabakh, a disputed territory which seceded from Azerbaijan in 1991 and is now a de facto independent state. They are well trained and well equipped with the latest in military software and hardware. The Karabakh army's heavy military hardware includes: 316 tanks, 324 armored vehicles, 322 artillery pieces of calibers over 122 mm, 44 multiple rocket launchers, and a new anti-aircraft defense system. In addition, the NKR Defence Army maintains a small air-force of 2 Su-25s, 5 Mi-24s and 5 other helicopters. Personnel The Armed Forces of Armenia is constitutionally a conscript force, but there is also a growing number of professional officers. There were roughly 19,000 conscripts and 23,000 professionals serving in 2017. Enlistment, which is performed twice a year, is handled by military commissariats. Male draftees between the ages of 18 and 27 are obliged to present themselves in the commissariats for registration. People who have changed their citizenship or have dual citizenship are also subject to conscription, unless they have already served in the armed forces of another country. Since 2003, conscientious objectors can apply for alternative service. Draft evaders can not be appointed to public service positions. Citizens who have completed military service are registered in the reserve and are divided into rank and file, non-commissioned and commissioned staff of the reserve. Reservists can be called up to training musters and exercises in peacetime. Reserve obligation lasts up to the age of 50. Educational institutions National Defense Research University Vazgen Sargsyan Military University Monte Melkonian Military Academy Armenak Khanperyants Military Aviation University Yerevan State Medical University Military Faculty Foreign institutions for Armenian soldiers Military Academy of Modena École spéciale militaire de Saint-Cyr Hellenic Military Academy Military University of the Ministry of Defense of the Russian Federation—College of Military Finance Higher military education is provided by the National Defense Research University in Yerevan. It was established in 2016, on the basis of the Institute for National Strategic Studies. The I Have the Honour State Program is an educational program of the ministry of defence that serves conscripts in the army. Participants of the program are given the right to defer conscription in favor of education in post-secondary institutions with full reimbursement of tuition fees, after which the conscript is awarded the rank of lieutenant and is appointed to the service for a period of 2 years and 3 months. Contract service A contractual military service is a service last for 3–12 months, or for a term of three or five years. Males under 36 who have not previously served as contract servicemen and are registered in the reserve, can be enrolled in contractual military service as privates. Felons and those not fit for service are ineligible for contract service. Since 2008, sergeant training courses for contract servicemen have operated in the Armed Forces and since 2013, the duration of the courses has three months. The courses are open to reservist privates under the age of 25. Conscription Military service in Armenia is mandatory. Citizens aged 27 to 50 are registered in the reserve and may be drafted if a national mobilization was declared. The enlistment process is handled by the military commissariats in January and May. Dual citizens are not be exempt from the draft. If one fails to follow through with their obligations, a criminal case is then instituted, which could lead to 3 years in jail. The following military commissariats operate in Armenia: Yerevan Conscription and Mobilization Service No.1 territorial subdivision No.2 Territorial Subdivision No.3 Territorial Subdivision No.4 Territorial Subdivision Ashtarak Aragatsotn Regional Subdivision Artashat Ararat Regional Subdivision Armavir Armavir Regional Subdivision Martuni Gegharkunik Regional Subdivision Abovyan Kotayk Regional Subdivision Vanadzor Lori Regional Subdivision Gyumri Shirak Regional Subdivision Goris Syunik Regional Subdivision Ijevan Tavush Regional Subdivision Yeghegnadzor Vayots Dzor Province Regional Subdivision The armed forces also sport the following volunteer units: Sisakan Regiment Erato Detachment Vanadzor Volunteer Detachment Homeland Detachment ARF Battalion Tigran the Great International Military Regiment Women in the armed forces During the First Nagorno-Karabakh War in the early 90s, at least 115 Armenian women were known to have taken part in combat operations. Many women from the diaspora arrived to serve in non-combat missions. The first woman to have been given a significant position in the military was Zhanna Galstyan, who was appointed deputy commander of the Central District Defensive Unit after the formation of the Artsakh Defense Army. More than 2,000 women currently serve in the army, with most working in administrative positions or in liaison and medical units. In October 2016, a program, approved by the National Assembly, committed the military to "creating additional opportunities" for women serving in the army or seeking military service. Defense Minister Vigen Sargsyan at the time told the MPs that "It would be wrong not to let them (women) reach their full potential." The Erato Detachment was the first all-women military unit in the Armenian Armed Forces, being created after of clashes between the Azerbaijani Army and Armenia occurred in July 2020. Anna Hakobyan, the wife of the current Prime Minister of Armenia, Nikol Pashinyan, underwent a week long combat readiness program with women from the Republic of Artsakh who joined the unit. Minorities During the 2020 war, a group of Yazidi reservists formed a reserve military unit that joined the frontline in Karabakh. The unit was led by Rzgan Sarhangyan and is composed of 50 soldiers aged between 18 and 55. Equipment The Armenian Army operates a wide variety of older equipment, mostly of Soviet origin. There is also some newer equipment from Russia. In 2015, a US$200m loan was ratified by Russia for the purchase of modern weapons between 2015 and 2017. Armenia produces its own combat helmets and body armors through the works of a joint Armenian-Polish company. Some personal equipment used by special units (Future Assault Shell Technology helmets, plate carriers and special pouches) is imported. Armenia also produces most of its small arms, with only specialised units being imported. Following the 2016 Nagorno-Karabakh clashes, the Helsinki Citizens' Assembly released a report, which detailed the circumstances of death of Armenian servicemen. Among the contributing factors were stated to be malfunctioning equipment and lack of necessary materiel, especially ammunition. This was followed by plans to increase Armenian defense spending to purchase more weapons and ammunition. Armenia is not a significant exporter of conventional weapons, but it has provided support, including material, to the Armenians of Nagorno-Karabakh during the Nagorno-Karabakh conflict. International military cooperation Russia Russia is one of the closest allies of Armenia. The Russian 102nd Military Base, the former 127th Motor Rifle Division, is stationed in Gyumri. The military alliance of the two nations and, in particular, the presence of Russian troops on Armenian soil has been a key element of Armenia's national security doctrine since Armenia gained independence in 1991. Russia stations an estimated 5,000 soldiers of all types in Armenia, including 3,000 officially reported to be based at the 102nd Military Base. In 1997, the two countries signed a far-reaching friendship treaty, which calls for mutual assistance in the event of a military threat to either party and allows Russian border guards to patrol Armenia's frontiers with Turkey and Iran. In early 2005, the 102nd Military Base had 74 tanks, 17 battle infantry vehicles, 148 armored personnel carriers, 84 artillery pieces, 18 MiG-29 fighters, one battery of SA-6 and two batteries of S-300 anti-aircraft missiles. However, in 2005–2007, following an agreement on the withdrawal of two Russian military bases from Georgia, a great deal of military hardware was moved to the 102nd Base from the Russian 12th Military Base in Batumi and the 62nd Military Base at Akhalkalaki, Georgia. Russia also supplies weapons at the relatively lower prices of the Russian domestic market as part of a collective security agreement since January 2004. According to unconfirmed reports by the Azeri media, Russia has supplied $1 billion worth of arms and ammunitions to Armenia in 1996; and handed over an additional $800 million worth of arms to Armenia in 2008–2009. According to AzerNews, the weapons in this latest transfer include 21 tanks, 12 armored vehicles, five other battle machines, a great number of rocket launchers, over 1,050 cases of grenades, nearly 7,900 types of ammunition, 120 grenade launchers, over 4,000 sub-machine guns, TNT fuses, mines of various types, 14 mine-launchers, 9 Grad launchers, five cannons, and other weapons. Officer training is another sphere of Russian-Armenian military cooperation. In the first years of sovereignty when Armenia lacked a military educational establishment of its own, officers of its army were trained in Russia. Even now when Armenia has a military college on its own territory, the Armenian officer corps honors the tradition and is trained at Russian military educational establishments. In 1997, 600 Armenian servicemen were being trained at Russian Military Academies: the training was conducted by the Marshal Bagramyan Training Brigade. At the first meeting of the joint Russian-Armenian government panel for military-technical cooperation that took place during autumn 2005, Prime Minister Mikhail Fradkov reported that, Russian factories will participate in the Armenian program of military modernization, and that Russia is prepared to supply the necessary spare parts and equipment. In accordance with this agreement, Armenia and Russia agreed to work together in exporting weapons and other military equipment to third countries in December 2009. The export agreement was signed by Defense Minister Seyran Ohanyan and a visiting senior Russian official, Konstantin Biryulin, during a meeting of a Russian-Armenian inter-governmental commission on bilateral military-technical cooperation. The agreement envisages the two countries' interaction in exporting military production to third countries, which will help to strengthen the armed forces of the two states, and further cement the already close Russian–Armenian military cooperation. A Russian-Armenian defense agreement signed in August 2010 extends Russia's military presence in Armenia till 2044 and commits Russia to supplying Armenia with modern and compatible weaponry and special military hardware at reduced prices. At the beginning of 2009, Azerbaijani media published allegations that Russia had made extensive weapons transfers to Armenia throughout 2008 costing about $800 million. On 12 January 2009, the Russian ambassador was invited to the Azerbaijani Ministry of Foreign Affairs and asked about this information. On 21 January 2009, Russian ministry of foreign relations officially denied the transfers. According to the materials published by WikiLeaks in December 2010, Azerbaijani defence minister Safar Abiyev claimed that in January 2009 during his visit to Moscow, his Russian counterpart Anatoly Serdyukov unofficially had admitted to weapons transfers "after the second bottle of vodka" that evening, although officially it was denied. In June 2013 it was revealed that Russia has deployed in Armenia several Iskander-M ballistic missiles systems, which are stationed at undisclosed locations in the country. Collective Security Treaty Organisation On 7 October 2002, the Presidents of Armenia, Belarus, Kazakhstan, Kyrgyzstan, Russia and Tajikistan, signed a charter in Tashkent, founding the Collective Security Treaty Organisation (CSTO) (Russian: Организация Договора о Коллективной Безопасности (ОДКБ~ODKB)) or simply Ташкентский договор (The Tashkent Treaty). Nikolai Bordyuzha was appointed secretary general of the new organisation. On 23 June 2006, Uzbekistan became a full participant in the CSTO and its membership was formally ratified by its parliament on 28 March 2008. Furthermore, the CSTO is an observer organisation at the United Nations General Assembly. The charter reaffirmed the desire of all participating states to abstain from the use or threat of force. Signatories would not be able to join other military alliances or other groups of states, while aggression against one signatory would be perceived as an aggression against all. To this end, the CSTO holds yearly military command exercises for the CSTO nations to have an opportunity to improve inter-organisation cooperation. The largest-scale CSTO military exercise held, to date, were the "Rubezh 2008" exercises hosted in Armenia where a combined total of 4,000 troops from all 7 constituent CSTO member countries conducted operative, strategic, and tactical training with an emphasis towards furthering the efficiency of the collective security element of the CSTO partnership. The Ministry of Defense of Armenia has repeatedly stated that it would expect direct military assistance from the CSTO in case war with Azerbaijan resumes, as recently as December 2009, Defense Minister Ohanyan made the same statement. In August 2009, Nikolay Bordyuzha, the CSTO's secretary-general, confirmed that official Yerevan can count on such support. On 4 February 2009, an agreement to create the Collective Rapid Reaction Force (KSOR) was reached by five of the seven CSTO members, with plans finalized on 14 June 2009. Armenia is one of the five member states. The force is intended to be used to repulse military aggression, conduct anti-terrorist operations, fight transnational crime and drug trafficking, and neutralize the effects of natural disasters. NATO Armenia participates in NATO's Partnership for Peace (PiP) program and it is in a NATO organization called Euro-Atlantic Partnership Council (EAPC). Armenia is in the process of implementation of Individual Partnership Action Plans (IPAPs), which is a program for those countries that have the political will and ability to deepen their relationship with NATO. Cooperative Best Effort exercise (the first where Russia was represented) was run on Armenian territory in 2003. France On 5 October 2023, following the 2023 Azerbaijani offensive in Nagorno-Karabakh, France announced that it would send defense aid to the Armenian military. Greece Greece is Armenia's closest ally in NATO and the two cooperate on multiple issues. A number of Armenian officers are trained in Greece every year, and military aid/material assistance has been provided to Armenia. In 2003, the two countries signed a military cooperation accord, under which Greece will increase the number of Armenian servicemen trained at the military and military-medical academies in Athens. In February 2003, Armenia sent 34 peacekeepers to Kosovo where they became part of the Greek contingent. Officials in Yerevan have said the Armenian military plans to substantially increase the size of its peacekeeping detachment and counts on Greek assistance to the effort. In June 2008, Armenia sent 72 peacekeepers to Kosovo for a total of 106 peacekeepers. Baltic States Lithuania has been sharing experience and providing consultations to the Armenian Defense Ministry in the field of democratic control of armed forces, military and defense concepts and public relations since 2002. Since 2004, Armenian officers have been invited to study at the Lithuanian War Academy and the Baltic Defence College in Tartu, Estonia. Lithuania covers all study expenditures. In early 2007, two Armenian officers for the first time took part in a Baltic lead international exercise, Amber Hope, which was held in Lithuania. United States The United States has been steadily upping its military clout in the region. In early 2003, the United States Department of Defense announced several major military programs in the Caucasus. Washington's military aid to Armenia in 2005 amounted to $5 million, and in April 2004, the two sides signed a military-technical cooperation accord. In late 2004, Armenia deployed a unit of 46 soldiers, which included bomb-disposal experts, doctors, and transport specialists, to Iraq as part of the American-led Multi-National Force Iraq. In 2005, the United States allocated $7 million to modernize the military communications of the Armenian Armed Forces. Since 2003, Armenia and the Kansas National Guard have exchanged military delegations as part of a National Guard Bureau program to promote better relations between the United States and developing nations. The program has largely consisted of mutual visits to each other's countries in an effort to share "ideas and [the] best practices for military and emergency management." Eagle Partner 2023 was a military exercise which took place in Armenia from 11 September to 20 September 2023. The main goal of the exercise was the fortifying of the alliance between the United States with Armenia and also the training of the 12th Peacekeeping Brigade of the Armed Forces of Armenia for future peacekeeping missions. Peacekeeping operations As of 2022, Armenia is involved in peacekeeping operations in Kosovo, Afghanistan, Lebanon, Mali and Kazakhstan Kosovo There are 70 Armenian soldiers serving in Kosovo as peacekeepers. Armenia joined the Kosovo Force in Kosovo in 2004. Armenian "blue helmets" serve within the Greek Army battalion. The relevant memorandum was signed on 3 September 2003, in Yerevan and ratified by the Armenian Parliament on 13 December 2003. The sixth deployment of Armenian peacekeepers departed for Kosovo on 14 November 2006. In 2008, the Armenian National Assembly voted unanimously to double the peacekeeping force in Kosovo by sending an extra 34 peacekeepers to the region, increasing the total number of peacekeepers in the region to 68. Armenia temporarily withdrew its peacekeepers from Kosovo in February 2012 as a result of the reduction of the Greek subdivisions. Armenia redeployed them in July to serve alongside American soldiers in Kosovo. Iraq After the end of the invasion of Iraq, Armenia deployed a unit of 46 peacekeepers under Polish command. Armenian peacekeepers were based in Al-Kut, from the capital of Baghdad. On 23 July 2006, the fourth shift of Armenian peacekeepers departed for Iraq. The shift included 3 staff commanders, 2 medical officers, 10 combat engineers and 31 drivers. Throughout the length of the deployment, there was one Armenian wounded and no deaths. The Armenian government extended the small troop presence in Iraq by one year at the end of 2005 and 2006. On 7 October 2008, Armenia withdrew its contingent of 46 peacekeepers. This coincided with the withdrawal of the Polish contingent in Iraq. Afghanistan Armenia deployed 130 soldiers in Afghanistan as part of the NATO-led International Security Assistance Force (ISAF). They were serving under German command protecting an airport in Kunduz. Lebanon In 2014, Armenia deployed 33 peacekeepers to Lebanon as part of UNIFIL. They currently serve under the Italian contingent and fulfill headquarter security functions. Mali In 2015, one peacekeeper was dispatched to Mali on a monitoring-peacekeeping mission. Kazakhstan In 2022, Armenia sent around 100 servicemen to Kazakhstan as part of the Collective Security Treaty Organization peacekeeping forces. Nikol Pashinyan, who serves as the CSTO chairman, confirmed that the alliance will send 'peacekeepers' to Kazakhstan for a limited period given the threat to national security and the sovereignty of Kazakhstan, due to the 2022 Kazakh protests. References External links Armenian Ministry of Defense	14
Since its independence, Armenia has maintained a policy of trying to have positive and friendly relations with Iran, Russia, and the West, including the United States and the European Union. It has full membership status in a number of international organizations, such as the Council of Europe and the Eurasian Economic Union, and observer status, etc. in some others. However, the dispute over the Armenian genocide of 1915 and the ongoing Nagorno-Karabakh conflict have created tense relations with two of its immediate neighbors, Azerbaijan and Turkey. The Ministry of Foreign Affairs implements the foreign policy agenda of the Government of Armenia and organizes and manages diplomatic services abroad. Since August 2021, Ararat Mirzoyan serves as the Minister of Foreign Affairs of Armenia. Foreign relations Armenia is a member of more than 70 different international organizations, including the following: Asian Development Bank Collective Security Treaty Organization and the Commonwealth of Independent States Council of Europe The EU's Eastern Partnership and the Euronest Parliamentary Assembly The UN's Eastern European Group Eurocontrol European Bank for Reconstruction and Development European Political Community Eurasian Economic Union Eurasian Development Bank and the Eurasian Customs Union Federation of Euro-Asian Stock Exchanges International Bank for Reconstruction and Development International Monetary Fund Interpol La Francophonie NATO's Euro-Atlantic Partnership Council, Individual Partnership Action Plan, and Partnership for Peace Organization for Security and Cooperation in Europe Organization of the Black Sea Economic Cooperation TRACECA United Nations World Bank, the World Customs Organization, and the World Trade Organization Armenia is also an observer member of the ASEAN Inter-Parliamentary Assembly, the Community of Democratic Choice, the Non-Aligned Movement, the Organization of American States, the Pacific Alliance, the Arab League, the Community of Democracies, a dialogue partner in the Shanghai Cooperation Organisation, and a regional member of the Asian Infrastructure Investment Bank. Armenian genocide recognition As of 2023, 34 states have officially recognized the historical events as genocide. Parliaments of countries that recognize the Armenian genocide include Argentina, Armenia, Austria, Belgium, Bolivia, Brazil, Bulgaria, Canada, Chile, Cyprus, Czech Republic, France, Germany, Greece, Italy, Latvia, Lebanon, Libya, Lithuania, Luxembourg, Mexico, the Netherlands, Paraguay, Poland, Portugal, Russia, Slovakia, Sweden, Switzerland, Syria, United States, Uruguay, Vatican City and Venezuela. Additionally, some regional governments of countries recognize the Armenian genocide too, such as New South Wales and South Australia in Australia as well as Scotland, Northern Ireland and Wales in the United Kingdom. US House Resolution 106 was introduced on 30 January 2007, and later referred to the House Committee on Foreign Affairs. The bill has 225 co-sponsors. The bill called for former President George W. Bush to recognize and use the word genocide in his annual 24 April speech which he never used. His successor President Barack Obama expressed his desire to recognize the Armenian genocide during the electoral campaigns, but after being elected, did not use the word "genocide" to describe the events that occurred in 1915. The US House of Representatives formally recognized the Armenian genocide with House Resolution 296 on 29 October 2019. The United States Senate unanimously recognized the genocide with Senate Resolution 150 on 12 December 2019. In 2021, President Joe Biden became the first U.S. president to formally recognize the Armenian genocide. As of 2022, all 50 U.S. states have also recognized the events as genocide. Disputes Nagorno-Karabakh conflict Armenia provides political, material and military support to the Republic of Artsakh in the longstanding Nagorno-Karabakh conflict. The current conflict over Nagorno-Karabakh began in 1988 when Armenian demonstrations against Azerbaijani rule broke out in Nagorno–Karabakh and later in Armenia. The Nagorno-Karabakh Autonomous Oblast voted to secede from Azerbaijan and join Armenia. Soon, violence broke out against Armenians in Azerbaijan and Azeris in Armenia. In 1990, after violent episodes in Nagorno–Karabakh and Azerbaijani cities like Baku, Sumgait and Kirovabad, Moscow declared a state of emergency in Karabakh, sending troops to the region, and forcibly occupied Baku, killing over a hundred civilians. In April 1991, Azerbaijani militia and Soviet forces targeted Armenian populations in Karabakh, known as Operation Ring. Moscow also deployed troops to Yerevan. Following the collapse of the Soviet Union, conflict escalated into a full-scale war between the Nagorno-Karabakh Republic (supported by Armenia), and Azerbaijan. Military action was influenced by the Russian military, which manipulated the rivalry between the two neighbouring sides in order to keep both under control. More than 30,000 people were killed in the fighting during the period of 1988 to 1994. In May 1992, Armenian forces seized Shusha and Lachin (thereby linking Nagorno-Karabakh to Armenia). By October 1993, Armenian forces succeeded in taking almost all of former NKAO, Lachin and large areas in southwestern Azerbaijan. In 1993, the UN Security Council adopted four resolutions calling for the cessation of hostilities, unimpeded access for international humanitarian relief efforts, and the eventual deployment of a peacekeeping force in the region. Fighting continued, however, until May 1994 at which time Russia brokered a cease-fire between the three sides. Negotiations to resolve the conflict peacefully have been ongoing since 1992 under the Minsk Group of the Organization for Security and Co-operation in Europe. The Minsk Group is co-chaired by Russia, France, and the United States and has representation from Turkey, the U.S., several European nations, Armenia and Azerbaijan. Despite the 1994 cease-fire, sporadic violations, sniper-fire and land mine incidents continue to claim over 100 lives each year. Since 1997, the Minsk Group co-chairs have presented three proposals to serve as a framework for resolving the conflict. Each proposal was rejected. Beginning in 1999, the presidents of Azerbaijan and Armenia initiated a direct dialogue through a series of face-to-face meetings, often facilitated by the Minsk Group Co-Chairs. The OSCE sponsored a round of negotiations between the presidents in Key West, Florida. U.S. Secretary of State Colin Powell launched the talks on 3 April 2001, and the negotiations continued with mediation by the U.S., Russia and France until 6 April 2001. The Co-Chairs are still continuing to work with the two presidents in the hope of finding lasting peace. The two countries are still at war. Citizens of Armenia, as well as citizens of any other country who are of Armenian descent, are forbidden entry to Azerbaijan. If a person's passport shows evidence of travel to Nagorno–Karabakh, they are forbidden entry to Azerbaijan. In 2008, in what became known as the 2008 Mardakert Skirmishes, Armenian forces and Azerbaijan clashed over Nagorno-Karabakh. The fighting between the sides was brief, with few casualties on either side. The 2020 Nagorno-Karabakh war was the latest escalation of the unresolved conflict. Countries without diplomatic relations Armenia does not have diplomatic relations with the following countries (organized by continent): Africa Botswana, Lesotho, São Tomé and Príncipe, South Sudan The Americas Barbados Asia Azerbaijan, Pakistan (Pakistan is the only country in the world that does not recognize Armenia), Saudi Arabia, Turkey, Yemen Oceania Marshall Islands, Papua New Guinea, Samoa, Solomon Islands, Tonga Armenia also has no diplomatic relations with states with limited recognition except for the Republic of Artsakh. Countries with diplomatic relations Armenia has diplomatic relations with the following countries: Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Australia, Austria, Bahamas, Bahrain, Bangladesh, Belarus, Belgium, Belize, Benin, Bhutan, Bolivia, Brazil, Brunei Darussalam, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Central African Republic, Chad, Chile, China, Colombia, Comoros, Costa Rica, Croatia, Cuba, Cyprus, Czech Republic, Denmark, Djibouti, Dominica, Dominican Republic, Democratic Republic of the Congo, Republic of the Congo, East Timor, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Eswatini, Ethiopia, Fiji, Finland, France, Gabon, The Gambia, Georgia, Germany, Ghana, Greece, Grenada, Guatemala, Guinea, Guinea-Bissau, Haiti, Holy See, Honduras, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Ivory Coast, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, North Korea, South Korea, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Liberia, Libya, Liechtenstein, Lithuania, Luxembourg, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Mauritania, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Morocco, Mozambique, Myanmar, Namibia, Nauru, Nepal, Netherlands, New Zealand, Nicaragua, Niger, Nigeria, North Macedonia, Norway, Oman, Palau, Panama, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Russia, Rwanda, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, San Marino, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Somalia, South Africa, Spain, Sri Lanka, Sudan, Suriname, Sweden, Switzerland, Syria, Tajikistan, Tanzania, Thailand, Togo, Trinidad and Tobago, Tunisia, Turkmenistan, Tuvalu, Uganda, Ukraine, the United Arab Emirates, the United Kingdom, the United States of America, Uruguay, Vanuatu, Venezuela, Vietnam, Zambia and Zimbabwe. Notes on some of these relations follow (organized by continent): Multilateral Bilateral Africa The Americas Asia Europe Oceania Other international organizations Armenia is additionally a full member, unless otherwise noted, in the following international organizations, programs and treaties: See also Armenia and the United Nations Armenia–BSEC relations Armenia in the Council of Europe Armenia–European Union relations Armenia–NATO relations Armenia–OSCE relations Armenian diaspora Armenian population by urban area Euronest Parliamentary Assembly Foreign relations of Artsakh List of ambassadors of Armenia List of diplomatic missions in Armenia List of diplomatic missions of Armenia List of ministers of foreign affairs of Armenia Politics of Europe Visa policy of Armenia Visa requirements for Armenian citizens Footnotes References External links Argentina List of Treaties ruling the relations Argentina and Armenia (Argentine Foreign Ministry, in Spanish) Canada Armenian embassy in Ottawa Canadian Ministry of Foreign Affairs and International Trade about relations with Armenian Chile Chilean Senate: recognition of the Armenian genocide (in Spanish only) Czech Armenian embassy in London British Foreign and Commonwealth Office about relations with Armenia *British embassy in Yerevan Denmark Danish Foreign Ministry: development program with Armenia NATO Iskandaryan, Alexander:"NATO and Armenia: A Long Game of Complementarism" in the Caucasus Analytical Digest No. 5 International Khachatrian, Haroutiun: "Foreign Investments in Armenia: Influence of the Crisis and Other Peculiarities" in the Caucasus Analytical Digest No. 28	5
Ibn Sina (; 980 – June 1037 CE), commonly known in the West as Avicenna (), was the preeminent philosopher and physician of the Muslim world, flourishing during the Islamic Golden Age, serving in the courts of various Iranian rulers. He is often described as the father of early modern medicine. His philosophy was of the Muslim Peripatetic school derived from Aristotelianism. His most famous works are The Book of Healing, a philosophical and scientific encyclopedia, and The Canon of Medicine, a medical encyclopedia which became a standard medical text at many medieval universities and remained in use as late as 1650. Besides philosophy and medicine, Avicenna's corpus includes writings on astronomy, alchemy, geography and geology, psychology, Islamic theology, logic, mathematics, physics, and works of poetry. Avicenna wrote most of his philosophical and scientific works in Arabic, but also wrote several key works in Persian, while his poetic works were written in both languages. Of the 450 works he is believed to have written, around 240 have survived, including 150 on philosophy and 40 on medicine. Name is a Latin corruption of the Arabic patronym Ibn Sīnā (), meaning "Son of Sina". However, Avicenna was not the son but the great-great-grandson of a man named Sina. His formal Arabic name was Abū ʿAlī al-Ḥusayn bin ʿAbdullāh ibn al-Ḥasan bin ʿAlī bin Sīnā al-Balkhi al-Bukhari (). Circumstances Avicenna created an extensive corpus of works during what is commonly known as the Islamic Golden Age, in which the translations of Byzantine Greco-Roman, Persian and Indian texts were studied extensively. Greco-Roman (Mid- and Neo-Platonic, and Aristotelian) texts translated by the Kindi school were commented, redacted and developed substantially by Islamic intellectuals, who also built upon Persian and Indian mathematical systems, astronomy, algebra, trigonometry and medicine. The Samanid dynasty in the eastern part of Persia, Greater Khorasan and Central Asia as well as the Buyid dynasty in the western part of Persia and Iraq provided a thriving atmosphere for scholarly and cultural development. Under the Samanids, Bukhara rivaled Baghdad as a cultural capital of the Islamic world. There, Avicenna had access to the great libraries of Balkh, Khwarezm, Gorgan, Rey, Isfahan and Hamadan. Various texts (such as the 'Ahd with Bahmanyar) show that Avicenna debated philosophical points with the greatest scholars of the time. Aruzi Samarqandi describes how before Avicenna left Khwarezm he had met Al-Biruni (a famous scientist and astronomer), Abu Nasr Iraqi (a renowned mathematician), Abu Sahl Masihi (a respected philosopher) and Abu al-Khayr Khammar (a great physician). The study of the Quran and the Hadith also thrived, and Islamic philosophy, fiqh and theology (kalaam) were all further developed by Avicenna and his opponents at this time. Biography Early life and education Avicenna was born in in the village of Afshana in Transoxiana to a family of Persian stock. The village was near the Samanid capital of Bukhara, which was his mother's hometown. His father Abd Allah was a native of the city of Balkh in Tukharistan. An official of the Samanid bureaucracy, he had served as the governor of a village of the royal estate of Harmaytan (near Bukhara) during the reign of Nuh II (). Avicenna also had a younger brother. A few years later, the family settled in Bukhara, a center of learning, which attracted many scholars. It was there that Avicenna was educated, which early on was seemingly administered by his father. Although both Avicenna's father and brother had converted to Ismailism, he himself did not follow the faith. He was instead an adherent of the Sunni Hanafi school, which was also followed by the Samanids. Avicenna was first schooled in the Quran and literature, and by the age of 10, he had memorized the entire Quran. He was later sent by his father to an Indian greengrocer, who taught him arithmetic. Afterwards, he was schooled in Jurisprudence by the Hanafi jurist Ismail al-Zahid. Some time later, Avicenna's father invited the physician and philosopher Abu Abdallah al-Natili to their house to educate Avicenna. Together, they studied the Isagoge of Porphyry (died 305) and possibly the Categories of Aristotle (died 322 BC) as well. After Avicenna had read the Almagest of Ptolemy (died 170) and Euclid's Elements, Natili told him to continue his research independently. By the time Avicenna was eighteen, he was well-educated in Greek sciences. Although Avicenna only mentions Natili as his teacher in his autobiography, he most likely had other teachers as well, such as the physicians Abu Mansur Qumri and Abu Sahl al-Masihi. Career In Bukhara and Gurganj At the age of seventeen, Avicenna was made a physician of Nuh II. By the time Avicenna was at least 21 years old, his father died. He was subsequently given an administrative post, possibly succeeding his father as the governor of Harmaytan. Avicenna later moved to Gurganj, the capital of Khwarazm, which he reports that he did due to "necessity". The date he went to the place is uncertain, as he reports that he served the Khwarazmshah (ruler) of the region, the Ma'munid Abu al-Hasan Ali. The latter ruled from 997 to 1009, which indicates that Avicenna moved sometime during that period. He may have moved in 999, the year which the Samanid state fell after the Turkic Qarakhanids captured Bukhara and imprisoned the Samanid ruler Abd al-Malik II. Due to his high position and strong connection with the Samanids, Avicenna may have found himself in an unfavorable position after the fall of his suzerain. It was through the minister of Gurganj, Abu'l-Husayn as-Sahi, a patron of Greek sciences, that Avicenna entered into the service of Abu al-Hasan Ali. Under the Ma'munids, Gurganj became a centre of learning, attracting many prominent figures, such as Avicenna and his former teacher Abu Sahl al-Masihi, the mathematician Abu Nasr Mansur, the physician Ibn al-Khammar, and the philologist al-Tha'alibi. In Gurgan Avicenna later moved due to "necessity" once more (in 1012), this time to the west. There he travelled through the Khurasani cities of Nasa, Abivard, Tus, Samangan and Jajarm. He was planning to visit the ruler of the city of Gurgan, the Ziyarid Qabus (), a cultivated patron of writing, whose court attracted many distinguished poets and scholars. However, when Avicenna eventually arrived, he discovered that the ruler had been dead since the winter of 1013. Avicenna then left Gurgan for Dihistan, but returned after becoming ill. There he met Abu 'Ubayd al-Juzjani (died 1070) who became his pupil and companion. Avicenna stayed briefly in Gurgan, reportedly serving Qabus's son and successor Manuchihr () and resided in the house of a patron. In Ray and Hamadan In , Avicenna went to the city of Ray, where he entered into the service of the Buyid amir (ruler) Majd al-Dawla () and his mother Sayyida Shirin, the de facto ruler of the realm. There he served as the physician at the court, treating Majd al-Dawla, who was suffering from melancholia. Avicenna reportedly later served as the "business manager" of Sayyida Shirin in Qazvin and Hamadan, though details regarding this tenure are unclear. During this period, Avicenna finished his Canon of Medicine, and started writing his Book of Healing. In 1015, during Avicenna's stay in Hamadan, he participated in a public debate, as was custom for newly arrived scholars in western Iran at that time. The purpose of the debate was to examine one's reputation against a prominent local resident. The person whom Avicenna debated against was Abu'l-Qasim al-Kirmani, a member of the school of philosophers of Baghdad. The debate became heated, resulting in Avicenna accusing Abu'l-Qasim of lack of basic knowledge in logic, while Abu'l-Qasim accused Avicenna of impoliteness. After the debate, Avicenna sent a letter to the Baghdad Peripatetics, asking if Abu'l-Qasim's claim that he shared the same opinion as them was true. Abu'l-Qasim later retaliated by writing a letter to an unknown person, in which he made accusations so serious, that Avicenna wrote to a deputy of Majd al-Dawla, named Abu Sa'd, to investigate the matter. The accusation made towards Avicenna may have been the same as he had received earlier, in which he was accused by the people of Hamadan of copying the stylistic structures of the Quran in his Sermons on Divine Unity. The seriousness of this charge, in the words of the historian Peter Adamson, "cannot be underestimated in the larger Muslim culture." Not long afterwards, Avicenna shifted his allegiance to the rising Buyid amir Shams al-Dawla (the younger brother of Majd al-Dawla), which Adamson suggests was due to Abu'l-Qasim also working under Sayyida Shirin. Avicenna had been called upon by Shams al-Dawla to treat him, but after the latter's campaign in the same year against his former ally, the Annazid ruler Abu Shawk (), he forced Avicenna to become his vizier. Although Avicenna would sometimes clash with Shams al-Dawla's troops, he remained vizier until the latter died of colic in 1021. Avicenna was asked by Shams al-Dawla's son and successor Sama' al-Dawla () to stay as vizier, but instead went into hiding with his patron Abu Ghalib al-Attar, to wait for better opportunities to emerge. It was during this period that Avicenna was secretly in contact with Ala al-Dawla Muhammad (), the Kakuyid ruler of Isfahan and uncle of Sayyida Shirin. It was during his stay at Attar's home that Avicenna completed his Book of Healing, writing 50 pages a day. The Buyid court in Hamadan, particularly the Kurdish vizier Taj al-Mulk, suspected Avicenna of correspondence with Ala al-Dawla, and as result had the house of Attar ransacked and Avicenna imprisoned in the fortress of Fardajan, outside Hamadan. Juzjani blames one of Avicenna's informers for his capture. Avicenna was imprisoned for four months, until Ala al-Dawla captured Hamadan, thus putting an end to Sama al-Dawla's reign. In Isfahan Avicenna was subsequently released, and went to Isfahan, where he was well received by Ala al-Dawla. In the words of Juzjani, the Kakuyid ruler gave Avicenna "the respect and esteem which someone like him deserved." Adamson also says that Avicenna's service under Ala al-Dawla "proved to be the most stable period of his life." Avicenna served as the advisor, if not vizier of Ala al-Dawla, accompanying him in many of his military expeditions and travels. Avicenna dedicated two Persian works to him, a philosophical treatise named Danish-nama-yi Ala'i ("Book of Science for Ala"), and a medical treatise about the pulse. During the brief occupation of Isfahan by the Ghaznavids in January 1030, Avicenna and Ala al-Dawla relocated to the southwestern Iranian region of Khuzistan, where they stayed until the death of the Ghaznavid ruler Mahmud (), which occurred two months later. It was seemingly when Avicenna returned to Isfahan that he started writing his Pointers and Reminders. In 1037, while Avicenna was accompanying Ala al-Dawla to a battle near Isfahan, he contracted a severe colic, which he had been suffering from throughout his life. He died shortly afterwards in Hamadan, where he was buried. Philosophy Avicenna wrote extensively on early Islamic philosophy, especially the subjects logic, ethics and metaphysics, including treatises named Logic and Metaphysics. Most of his works were written in Arabic—then the language of science in the Middle East—and some in Persian. Of linguistic significance even to this day are a few books that he wrote in nearly pure Persian language (particularly the Danishnamah-yi 'Ala', Philosophy for Ala' ad-Dawla'). Avicenna's commentaries on Aristotle often criticized the philosopher, encouraging a lively debate in the spirit of ijtihad. Avicenna's Neoplatonic scheme of "emanations" became fundamental in the Kalam (school of theological discourse) in the 12th century. His Book of Healing became available in Europe in partial Latin translation some fifty years after its composition, under the title Sufficientia, and some authors have identified a "Latin Avicennism" as flourishing for some time, paralleling the more influential Latin Averroism, but suppressed by the Parisian decrees of 1210 and 1215. Avicenna's psychology and theory of knowledge influenced William of Auvergne, Bishop of Paris and Albertus Magnus, while his metaphysics influenced the thought of Thomas Aquinas. Metaphysical doctrine Early Islamic philosophy and Islamic metaphysics, imbued as it is with Islamic theology, distinguishes between essence and existence more clearly than Aristotelianism. Whereas existence is the domain of the contingent and the accidental, essence endures within a being beyond the accidental. The philosophy of Avicenna, particularly that part relating to metaphysics, owes much to al-Farabi. The search for a definitive Islamic philosophy separate from Occasionalism can be seen in what is left of his work. Following al-Farabi's lead, Avicenna initiated a full-fledged inquiry into the question of being, in which he distinguished between essence (Mahiat) and existence (Wujud). He argued that the fact of existence cannot be inferred from or accounted for by the essence of existing things, and that form and matter by themselves cannot interact and originate the movement of the universe or the progressive actualization of existing things. Existence must, therefore, be due to an agent-cause that necessitates, imparts, gives, or adds existence to an essence. To do so, the cause must be an existing thing and coexist with its effect. Avicenna's consideration of the essence-attributes question may be elucidated in terms of his ontological analysis of the modalities of being; namely impossibility, contingency and necessity. Avicenna argued that the impossible being is that which cannot exist, while the contingent in itself (mumkin bi-dhatihi) has the potentiality to be or not to be without entailing a contradiction. When actualized, the contingent becomes a 'necessary existent due to what is other than itself' (wajib al-wujud bi-ghayrihi). Thus, contingency-in-itself is potential beingness that could eventually be actualized by an external cause other than itself. The metaphysical structures of necessity and contingency are different. Necessary being due to itself (wajib al-wujud bi-dhatihi) is true in itself, while the contingent being is 'false in itself' and 'true due to something else other than itself'. The necessary is the source of its own being without borrowed existence. It is what always exists. The Necessary exists 'due-to-Its-Self', and has no quiddity/essence (mahiyya) other than existence (wujud). Furthermore, It is 'One' (wahid ahad) since there cannot be more than one 'Necessary-Existent-due-to-Itself' without differentia (fasl) to distinguish them from each other. Yet, to require differentia entails that they exist 'due-to-themselves' as well as 'due to what is other than themselves'; and this is contradictory. However, if no differentia distinguishes them from each other, then there is no sense in which these 'Existents' are not one and the same. Avicenna adds that the 'Necessary-Existent-due-to-Itself' has no genus (jins), nor a definition (hadd), nor a counterpart (nadd), nor an opposite (did), and is detached (bari) from matter (madda), quality (kayf), quantity (kam), place (ayn), situation (wad) and time (waqt). Avicenna's theology on metaphysical issues (ilāhiyyāt) has been criticized by some Islamic scholars, among them al-Ghazali, Ibn Taymiyya and Ibn al-Qayyim. While discussing the views of the theists among the Greek philosophers, namely Socrates, Plato and Aristotle in Al-Munqidh min ad-Dalal ("Deliverance from Error"), al-Ghazali noted that the Greek philosophers "must be taxed with unbelief, as must their partisans among the Muslim philosophers, such as Avicenna and al-Farabi and their likes." He added that "None, however, of the Muslim philosophers engaged so much in transmitting Aristotle's lore as did the two men just mentioned. [...] The sum of what we regard as the authentic philosophy of Aristotle, as transmitted by al-Farabi and Avicenna, can be reduced to three parts: a part which must be branded as unbelief; a part which must be stigmatized as innovation; and a part which need not be repudiated at all." Argument for God's existence Avicenna made an argument for the existence of God which would be known as the "Proof of the Truthful" (Arabic: burhan al-siddiqin). Avicenna argued that there must be a "necessary existent" (Arabic: wajib al-wujud), an entity that cannot not exist and through a series of arguments, he identified it with the Islamic conception of God. Present-day historian of philosophy Peter Adamson called this argument one of the most influential medieval arguments for God's existence, and Avicenna's biggest contribution to the history of philosophy. Al-Biruni correspondence Correspondence between Avicenna (with his student Ahmad ibn 'Ali al-Ma'sumi) and Al-Biruni has survived in which they debated Aristotelian natural philosophy and the Peripatetic school. Abu Rayhan began by asking Avicenna eighteen questions, ten of which were criticisms of Aristotle's On the Heavens. Theology Avicenna was a devout Muslim and sought to reconcile rational philosophy with Islamic theology. His aim was to prove the existence of God and His creation of the world scientifically and through reason and logic. Avicenna's views on Islamic theology (and philosophy) were enormously influential, forming part of the core of the curriculum at Islamic religious schools until the 19th century. Avicenna wrote a number of short treatises dealing with Islamic theology. These included treatises on the prophets (whom he viewed as "inspired philosophers"), and also on various scientific and philosophical interpretations of the Quran, such as how Quranic cosmology corresponds to his own philosophical system. In general these treatises linked his philosophical writings to Islamic religious ideas; for example, the body's afterlife. There are occasional brief hints and allusions in his longer works, however, that Avicenna considered philosophy as the only sensible way to distinguish real prophecy from illusion. He did not state this more clearly because of the political implications of such a theory, if prophecy could be questioned, and also because most of the time he was writing shorter works which concentrated on explaining his theories on philosophy and theology clearly, without digressing to consider epistemological matters which could only be properly considered by other philosophers. Later interpretations of Avicenna's philosophy split into three different schools; those (such as al-Tusi) who continued to apply his philosophy as a system to interpret later political events and scientific advances; those (such as al-Razi) who considered Avicenna's theological works in isolation from his wider philosophical concerns; and those (such as al-Ghazali) who selectively used parts of his philosophy to support their own attempts to gain greater spiritual insights through a variety of mystical means. It was the theological interpretation championed by those such as al-Razi which eventually came to predominate in the madrasahs. Avicenna memorized the Quran by the age of ten, and as an adult, he wrote five treatises commenting on suras from the Quran. One of these texts included the Proof of Prophecies, in which he comments on several Quranic verses and holds the Quran in high esteem. Avicenna argued that the Islamic prophets should be considered higher than philosophers. Avicenna is generally understood to have been aligned with the Sunni Hanafi school of thought. Avicenna studied Hanafi law, many of his notable teachers were Hanafi jurists, and he served under the Hanafi court of Ali ibn Mamun. Avicenna said at an early age that he remained "unconvinced" by Ismaili missionary attempts to convert him. Medieval historian Ẓahīr al-dīn al-Bayhaqī (d. 1169) also believed Avicenna to be a follower of the Brethren of Purity. Thought experiments While he was imprisoned in the castle of Fardajan near Hamadhan, Avicenna wrote his famous "floating man"—literally falling man—a thought experiment to demonstrate human self-awareness and the substantiality and immateriality of the soul. Avicenna believed his "Floating Man" thought experiment demonstrated that the soul is a substance, and claimed humans cannot doubt their own consciousness, even in a situation that prevents all sensory data input. The thought experiment told its readers to imagine themselves created all at once while suspended in the air, isolated from all sensations, which includes no sensory contact with even their own bodies. He argued that, in this scenario, one would still have self-consciousness. Because it is conceivable that a person, suspended in air while cut off from sense experience, would still be capable of determining his own existence, the thought experiment points to the conclusions that the soul is a perfection, independent of the body, and an immaterial substance. The conceivability of this "Floating Man" indicates that the soul is perceived intellectually, which entails the soul's separateness from the body. Avicenna referred to the living human intelligence, particularly the active intellect, which he believed to be the hypostasis by which God communicates truth to the human mind and imparts order and intelligibility to nature. Following is an English translation of the argument: However, Avicenna posited the brain as the place where reason interacts with sensation. Sensation prepares the soul to receive rational concepts from the universal Agent Intellect. The first knowledge of the flying person would be "I am," affirming his or her essence. That essence could not be the body, obviously, as the flying person has no sensation. Thus, the knowledge that "I am" is the core of a human being: the soul exists and is self-aware. Avicenna thus concluded that the idea of the self is not logically dependent on any physical thing, and that the soul should not be seen in relative terms, but as a primary given, a substance. The body is unnecessary; in relation to it, the soul is its perfection. In itself, the soul is an immaterial substance. Principal works The Canon of Medicine Avicenna authored a five-volume medical encyclopedia: The Canon of Medicine (Al-Qanun fi't-Tibb). It was used as the standard medical textbook in the Islamic world and Europe up to the 18th century. The Canon still plays an important role in Unani medicine. Liber Primus Naturalium Avicenna considered whether events like rare diseases or disorders have natural causes. He used the example of polydactyly to explain his perception that causal reasons exist for all medical events. This view of medical phenomena anticipated developments in the Enlightenment by seven centuries. The Book of Healing Earth sciences Avicenna wrote on Earth sciences such as geology in The Book of Healing. While discussing the formation of mountains, he explained: Philosophy of science In the Al-Burhan (On Demonstration) section of The Book of Healing, Avicenna discussed the philosophy of science and described an early scientific method of inquiry. He discussed Aristotle's Posterior Analytics and significantly diverged from it on several points. Avicenna discussed the issue of a proper methodology for scientific inquiry and the question of "How does one acquire the first principles of a science?" He asked how a scientist would arrive at "the initial axioms or hypotheses of a deductive science without inferring them from some more basic premises?" He explained that the ideal situation is when one grasps that a "relation holds between the terms, which would allow for absolute, universal certainty". Avicenna then added two further methods for arriving at the first principles: the ancient Aristotelian method of induction (istiqra), and the method of examination and experimentation (tajriba). Avicenna criticized Aristotelian induction, arguing that "it does not lead to the absolute, universal, and certain premises that it purports to provide." In its place, he developed a "method of experimentation as a means for scientific inquiry." Logic An early formal system of temporal logic was studied by Avicenna. Although he did not develop a real theory of temporal propositions, he did study the relationship between temporalis and the implication. Avicenna's work was further developed by Najm al-Dīn al-Qazwīnī al-Kātibī and became the dominant system of Islamic logic until modern times. Avicennian logic also influenced several early European logicians such as Albertus Magnus and William of Ockham. Avicenna endorsed the law of non-contradiction proposed by Aristotle, that a fact could not be both true and false at the same time and in the same sense of the terminology used. He stated, "Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as not to be beaten, and to be burned is not the same as not to be burned." Physics In mechanics, Avicenna, in The Book of Healing, developed a theory of motion, in which he made a distinction between the inclination (tendency to motion) and force of a projectile, and concluded that motion was a result of an inclination (mayl) transferred to the projectile by the thrower, and that projectile motion in a vacuum would not cease. He viewed inclination as a permanent force whose effect is dissipated by external forces such as air resistance. The theory of motion presented by Avicenna was probably influenced by the 6th-century Alexandrian scholar John Philoponus. Avicenna's is a less sophisticated variant of the theory of impetus developed by Buridan in the 14th century. It is unclear if Buridan was influenced by Avicenna, or by Philoponus directly. In optics, Avicenna was among those who argued that light had a speed, observing that "if the perception of light is due to the emission of some sort of particles by a luminous source, the speed of light must be finite." He also provided a wrong explanation of the rainbow phenomenon. Carl Benjamin Boyer described Avicenna's ("Ibn Sīnā") theory on the rainbow as follows: In 1253, a Latin text entitled Speculum Tripartitum stated the following regarding Avicenna's theory on heat: Psychology Avicenna's legacy in classical psychology is primarily embodied in the Kitab al-nafs parts of his Kitab al-shifa (The Book of Healing) and Kitab al-najat (The Book of Deliverance). These were known in Latin under the title De Anima (treatises "on the soul"). Notably, Avicenna develops what is called the Flying Man argument in the Psychology of The Cure I.1.7 as defence of the argument that the soul is without quantitative extension, which has an affinity with Descartes's cogito argument (or what phenomenology designates as a form of an "epoche"). Avicenna's psychology requires that connection between the body and soul be strong enough to ensure the soul's individuation, but weak enough to allow for its immortality. Avicenna grounds his psychology on physiology, which means his account of the soul is one that deals almost entirely with the natural science of the body and its abilities of perception. Thus, the philosopher's connection between the soul and body is explained almost entirely by his understanding of perception; in this way, bodily perception interrelates with the immaterial human intellect. In sense perception, the perceiver senses the form of the object; first, by perceiving features of the object by our external senses. This sensory information is supplied to the internal senses, which merge all the pieces into a whole, unified conscious experience. This process of perception and abstraction is the nexus of the soul and body, for the material body may only perceive material objects, while the immaterial soul may only receive the immaterial, universal forms. The way the soul and body interact in the final abstraction of the universal from the concrete particular is the key to their relationship and interaction, which takes place in the physical body. The soul completes the action of intellection by accepting forms that have been abstracted from matter. This process requires a concrete particular (material) to be abstracted into the universal intelligible (immaterial). The material and immaterial interact through the Active Intellect, which is a "divine light" containing the intelligible forms. The Active Intellect reveals the universals concealed in material objects much like the sun makes colour available to our eyes. Other contributions Astronomy and astrology Avicenna wrote an attack on astrology titled Resāla fī ebṭāl aḥkām al-nojūm, in which he cited passages from the Quran to dispute the power of astrology to foretell the future. He believed that each planet had some influence on the earth, but argued against astrologers being able to determine the exact effects. Avicenna's astronomical writings had some influence on later writers, although in general his work could be considered less developed than Alhazen or Al-Biruni. One important feature of his writing is that he considers mathematical astronomy as a separate discipline to astrology. He criticized Aristotle's view of the stars receiving their light from the Sun, stating that the stars are self-luminous, and believed that the planets are also self-luminous. He claimed to have observed Venus as a spot on the Sun. This is possible, as there was a transit on 24 May 1032, but Avicenna did not give the date of his observation, and modern scholars have questioned whether he could have observed the transit from his location at that time; he may have mistaken a sunspot for Venus. He used his transit observation to help establish that Venus was, at least sometimes, below the Sun in Ptolemaic cosmology, i.e. the sphere of Venus comes before the sphere of the Sun when moving out from the Earth in the prevailing geocentric model. He also wrote the Summary of the Almagest, (based on Ptolemy's Almagest), with an appended treatise "to bring that which is stated in the Almagest and what is understood from Natural Science into conformity". For example, Avicenna considers the motion of the solar apogee, which Ptolemy had taken to be fixed. Chemistry Avicenna was first to derive the attar of flowers from distillation and used steam distillation to produce essential oils such as rose essence, which he used as aromatherapeutic treatments for heart conditions. Unlike al-Razi, Avicenna explicitly disputed the theory of the transmutation of substances commonly believed by alchemists: Four works on alchemy attributed to Avicenna were translated into Latin as: was the most influential, having influenced later medieval chemists and alchemists such as Vincent of Beauvais. However, Anawati argues (following Ruska) that the de Anima is a fake by a Spanish author. Similarly the Declaratio is believed not to be actually by Avicenna. The third work (The Book of Minerals) is agreed to be Avicenna's writing, adapted from the Kitab al-Shifa (Book of the Remedy). Avicenna classified minerals into stones, fusible substances, sulfurs and salts, building on the ideas of Aristotle and Jabir. The epistola de Re recta is somewhat less sceptical of alchemy; Anawati argues that it is by Avicenna, but written earlier in his career when he had not yet firmly decided that transmutation was impossible. Poetry Almost half of Avicenna's works are versified. His poems appear in both Arabic and Persian. As an example, Edward Granville Browne claims that the following Persian verses are incorrectly attributed to Omar Khayyám, and were originally written by Ibn Sīnā: Legacy Classical Islamic civilization Robert Wisnovsky, a scholar of Avicenna attached to McGill University, says that "Avicenna was the central figure in the long history of the rational sciences in Islam, particularly in the fields of metaphysics, logic and medicine" but that his works didn't only have an influence in these "secular" fields of knowledge alone, as "these works, or portions of them, were read, taught, copied, commented upon, quoted, paraphrased and cited by thousands of post-Avicennian scholars—not only philosophers, logicians, physicians and specialists in the mathematical or exact sciences, but also by those who specialized in the disciplines of ʿilm al-kalām (rational theology, but understood to include natural philosophy, epistemology and philosophy of mind) and usūl al-fiqh (jurisprudence, but understood to include philosophy of law, dialectic, and philosophy of language)." Middle Ages and Renaissance As early as the 14th century when Dante Alighieri depicted him in Limbo alongside the virtuous non-Christian thinkers in his Divine Comedy such as Virgil, Averroes, Homer, Horace, Ovid, Lucan, Socrates, Plato and Saladin. Avicenna has been recognized by both East and West as one of the great figures in intellectual history. Johannes Kepler cites Avicenna's opinion when discussing the causes of planetary motions in Chapter 2 of Astronomia Nova. George Sarton, the author of The History of Science, described Avicenna as "one of the greatest thinkers and medical scholars in history" and called him "the most famous scientist of Islam and one of the most famous of all races, places, and times". He was one of the Islamic world's leading writers in the field of medicine. Along with Rhazes, Abulcasis, Ibn al-Nafis and al-Ibadi, Avicenna is considered an important compiler of early Muslim medicine. He is remembered in the Western history of medicine as a major historical figure who made important contributions to medicine and the European Renaissance. His medical texts were unusual in that where controversy existed between Galen and Aristotle's views on medical matters (such as anatomy), he preferred to side with Aristotle, where necessary updating Aristotle's position to take into account post-Aristotelian advances in anatomical knowledge. Aristotle's dominant intellectual influence among medieval European scholars meant that Avicenna's linking of Galen's medical writings with Aristotle's philosophical writings in the Canon of Medicine (along with its comprehensive and logical organisation of knowledge) significantly increased Avicenna's importance in medieval Europe in comparison to other Islamic writers on medicine. His influence following translation of the Canon was such that from the early fourteenth to the mid-sixteenth centuries he was ranked with Hippocrates and Galen as one of the acknowledged authorities, ("prince of physicians"). Modern reception Institutions in a variety of counties have been named after Avicenna in honour of his scientific accomplishments, including the Avicenna Mausoleum and Museum, Bu-Ali Sina University, Avicenna Research Institute and Ibn Sina Academy of Medieval Medicine and Sciences. There is also a crater on the Moon named Avicenna. The Avicenna Prize, established in 2003, is awarded every two years by UNESCO and rewards individuals and groups for their achievements in the field of ethics in science. The Avicenna Directories (2008–15; now the World Directory of Medical Schools) list universities and schools where doctors, public health practitioners, pharmacists and others, are educated. The original project team stated: In June 2009, Iran donated a "Persian Scholars Pavilion" to the United Nations Office in Vienna. It now sits in the Vienna International Center. In popular culture The 1982 Soviet film Youth of Genius () by recounts Avicenna's younger years. The film is set in Bukhara at the turn of the millennium. In Louis L'Amour's 1985 historical novel The Walking Drum, Kerbouchard studies and discusses Avicenna's The Canon of Medicine. In his book The Physician (1988) Noah Gordon tells the story of a young English medical apprentice who disguises himself as a Jew to travel from England to Persia and learn from Avicenna, the great master of his time. The novel was adapted into a feature film, The Physician, in 2013. Avicenna was played by Ben Kingsley. List of works The treatises of Avicenna influenced later Muslim thinkers in many areas including theology, philology, mathematics, astronomy, physics and music. His works numbered almost 450 volumes on a wide range of subjects, of which around 240 have survived. In particular, 150 volumes of his surviving works concentrate on philosophy and 40 of them concentrate on medicine. His most famous works are The Book of Healing, and The Canon of Medicine. Avicenna wrote at least one treatise on alchemy, but several others have been falsely attributed to him. His Logic, Metaphysics, Physics, and De Caelo, are treatises giving a synoptic view of Aristotelian doctrine, though Metaphysics demonstrates a significant departure from the brand of Neoplatonism known as Aristotelianism in Avicenna's world; Arabic philosophers have hinted at the idea that Avicenna was attempting to "re-Aristotelianise" Muslim philosophy in its entirety, unlike his predecessors, who accepted the conflation of Platonic, Aristotelian, Neo- and Middle-Platonic works transmitted into the Muslim world. The Logic and Metaphysics have been extensively reprinted, the latter, e.g., at Venice in 1493, 1495 and 1546. Some of his shorter essays on medicine, logic, etc., take a poetical form (the poem on logic was published by Schmoelders in 1836). Two encyclopedic treatises, dealing with philosophy, are often mentioned. The larger, Al-Shifa' (Sanatio), exists nearly complete in manuscript in the Bodleian Library and elsewhere; part of it on the De Anima appeared at Pavia (1490) as the Liber Sextus Naturalium, and the long account of Avicenna's philosophy given by Muhammad al-Shahrastani seems to be mainly an analysis, and in many places a reproduction, of the Al-Shifa'. A shorter form of the work is known as the An-najat (Liberatio). The Latin editions of part of these works have been modified by the corrections which the monastic editors confess that they applied. There is also a (hikmat-al-mashriqqiyya, in Latin Philosophia Orientalis), mentioned by Roger Bacon, the majority of which is lost in antiquity, which according to Averroes was pantheistic in tone. Avicenna's works further include: Sirat al-shaykh al-ra'is (The Life of Avicenna), ed. and trans. WE. Gohlman, Albany, NY: State University of New York Press, 1974. (The only critical edition of Avicenna's autobiography, supplemented with material from a biography by his student Abu 'Ubayd al-Juzjani. A more recent translation of the Autobiography appears in D. Gutas, Avicenna and the Aristotelian Tradition: Introduction to Reading Avicenna's Philosophical Works, Leiden: Brill, 1988; second edition 2014.) Al-isharat wa al-tanbihat (Remarks and Admonitions), ed. S. Dunya, Cairo, 1960; parts translated by S.C. Inati, Remarks and Admonitions, Part One: Logic, Toronto, Ont.: Pontifical Institute for Mediaeval Studies, 1984, and Ibn Sina and Mysticism, Remarks and Admonitions: Part 4, London: Kegan Paul International, 1996. Al-Qanun fi'l-tibb (The Canon of Medicine), ed. I. a-Qashsh, Cairo, 1987. (Encyclopedia of medicine.) manuscript, Latin translation, Flores Avicenne, Michael de Capella, 1508, Modern text. Ahmed Shawkat Al-Shatti, Jibran Jabbur. Risalah fi sirr al-qadar (Essay on the Secret of Destiny), trans. G. Hourani in Reason and Tradition in Islamic Ethics, Cambridge: Cambridge University Press, 1985. Danishnama-i 'ala'i (The Book of Scientific Knowledge), ed. and trans. P. Morewedge, The Metaphysics of Avicenna, London: Routledge and Kegan Paul, 1973. Kitab al-Shifa''' (The Book of Healing). (Avicenna's major work on philosophy. He probably began to compose al-Shifa' in 1014, and completed it in 1020.) Critical editions of the Arabic text have been published in Cairo, 1952–83, originally under the supervision of I. Madkour. Kitab al-Najat (The Book of Salvation), trans. F. Rahman, Avicenna's Psychology: An English Translation of Kitab al-Najat, Book II, Chapter VI with Historical-philosophical Notes and Textual Improvements on the Cairo Edition, Oxford: Oxford University Press, 1952. (The psychology of al-Shifa'.) (Digital version of the Arabic text) Risala fi'l-Ishq (A Treatise on Love). Translated by Emil L. Fackenheim. Persian works Avicenna's most important Persian work is the Danishnama-i 'Alai (, "the Book of Knowledge for [Prince] 'Ala ad-Daulah"). Avicenna created new scientific vocabulary that had not previously existed in Persian. The Danishnama covers such topics as logic, metaphysics, music theory and other sciences of his time. It has been translated into English by Parwiz Morewedge in 1977. The book is also important in respect to Persian scientific works.Andar Danesh-e Rag (, "On the Science of the Pulse") contains nine chapters on the science of the pulse and is a condensed synopsis. Persian poetry from Avicenna is recorded in various manuscripts and later anthologies such as Nozhat al-Majales. See also Al-Qumri (possibly Avicenna's teacher) Abdol Hamid Khosro Shahi (Iranian theologian) Mummia (Persian medicine) Eastern philosophy Iranian philosophy Islamic philosophy Contemporary Islamic philosophy Science in the medieval Islamic world List of scientists in medieval Islamic world Sufi philosophy Science and technology in Iran Ancient Iranian medicine List of pre-modern Iranian scientists and scholars Namesakes of Ibn Sina Ibn Sina Academy of Medieval Medicine and Sciences in Aligarh Avicenna Bay in Antarctica Avicenna (crater) on the far side of the Moon Avicenna Cultural and Scientific Foundation Avicenne Hospital in Paris, France Avicenna International College in Budapest, Hungary Avicenna Mausoleum (complex dedicated to Avicenna) in Hamadan, Iran Avicenna Research Institute in Tehran, Iran Avicenna Tajik State Medical University in Dushanbe, Tajikistan Bu-Ali Sina University in Hamedan, Iran Ibn Sina Peak – named after the Scientist, on the Kyrgyzstan–Tajikistan border Ibn Sina Foundation in Houston, Texas Ibn Sina Hospital, Baghdad, Iraq Ibn Sina Hospital, Istanbul, Turkey Ibn Sina Medical College Hospital, Dhaka, Bangladesh Ibn Sina University Hospital of Rabat-Salé at Mohammed V University in Rabat, Morocco Ibne Sina Hospital, Multan, Punjab, Pakistan International Ibn Sina Clinic, Dushanbe, Tajikistan References Citations Sources Further reading Encyclopedic articles (PDF version) Avicenna entry by Sajjad H. Rizvi in the Internet Encyclopedia of Philosophy Primary literature For an old list of other extant works, C. Brockelmann's Geschichte der arabischen Litteratur (Weimar 1898), vol. i. pp. 452–458. (XV. W.; G. W. T.) For a current list of his works see A. Bertolacci (2006) and D. Gutas (2014) in the section "Philosophy". Avicenne: Réfutation de l'astrologie. Edition et traduction du texte arabe, introduction, notes et lexique par Yahya Michot. Préface d'Elizabeth Teissier (Beirut-Paris: Albouraq, 2006) . William E. Gohlam (ed.), The Life of Ibn Sina. A Critical Edition and Annotated Translation, Albany, State of New York University Press, 1974. For Ibn Sina's life, see Ibn Khallikan's Biographical Dictionary, translated by de Slane (1842); F. Wüstenfeld's Geschichte der arabischen Aerzte und Naturforscher (Göttingen, 1840). Madelung, Wilferd and Toby Mayer (ed. and tr.), Struggling with the Philosopher: A Refutation of Avicenna's Metaphysics. A New Arabic Edition and English Translation of Shahrastani's Kitab al-Musara'a. Secondary literature This is, on the whole, an informed and good account of the life and accomplishments of one of the greatest influences on the development of thought both Eastern and Western. ... It is not as philosophically thorough as the works of D. Saliba, A.M. Goichon, or L. Gardet, but it is probably the best essay in English on this important thinker of the Middle Ages. (Julius R. Weinberg, The Philosophical Review, Vol. 69, No. 2, Apr. 1960, pp. 255–259) This is a distinguished work which stands out from, and above, many of the books and articles which have been written in this century on Avicenna (Ibn Sīnā) (980–1037). It has two main features on which its distinction as a major contribution to Avicennan studies may be said to rest: the first is its clarity and readability; the second is the comparative approach adopted by the author. ... (Ian Richard Netton, Journal of the Royal Asiatic Society, Third Series, Vol. 4, No. 2, July 1994, pp. 263–264) Y.T. Langermann (ed.), Avicenna and his Legacy. A Golden Age of Science and Philosophy, Brepols Publishers, 2010, For a new understanding of his early career, based on a newly discovered text, see also: Michot, Yahya, Ibn Sînâ: Lettre au vizir Abû Sa'd. Editio princeps d'après le manuscrit de Bursa, traduction de l'arabe, introduction, notes et lexique (Beirut-Paris: Albouraq, 2000) . This German publication is both one of the most comprehensive general introductions to the life and works of the philosopher and physician Avicenna (Ibn Sīnā, d. 1037) and an extensive and careful survey of his contribution to the history of science. Its author is a renowned expert in Greek and Arabic medicine who has paid considerable attention to Avicenna in his recent studies. ... (Amos Bertolacci, Isis, Vol. 96, No. 4, December 2005, p. 649) Shaikh al Rais Ibn Sina (Special number) 1958–59, Ed. Hakim Syed Zillur Rahman, Tibbia College Magazine, Aligarh Muslim University, Aligarh, India. Medicine Browne, Edward G. Islamic Medicine. Fitzpatrick Lectures Delivered at the Royal College of Physicians in 1919–1920, reprint: New Delhi: Goodword Books, 2001. Pormann, Peter & Savage-Smith, Emilie. Medieval Islamic Medicine, Washington: Georgetown University Press, 2007. Prioreschi, Plinio. Byzantine and Islamic Medicine, A History of Medicine, Vol. 4, Omaha: Horatius Press, 2001. Syed Ziaur Rahman. Pharmacology of Avicennian Cardiac Drugs (Metaanalysis of researches and studies in Avicennian Cardiac Drugs along with English translation of Risalah al Adwiya al Qalbiyah), Ibn Sina Academy of Medieval Medicine and Sciences, Aligarh, India, 2020 Philosophy Amos Bertolacci, The Reception of Aristotle's Metaphysics in Avicenna's Kitab al-Sifa'. A Milestone of Western Metaphysical Thought, Leiden: Brill 2006, (Appendix C contains an Overview of the Main Works by Avicenna on Metaphysics in Chronological Order). Dimitri Gutas, Avicenna and the Aristotelian Tradition: Introduction to Reading Avicenna's Philosophical Works, Leiden, Brill 2014, second revised and expanded edition (first edition: 1988), including an inventory of Avicenna' Authentic Works. Andreas Lammer: The Elements of Avicenna's Physics. Greek Sources and Arabic Innovations. Scientia graeco-arabica 20. Berlin / Boston: Walter de Gruyter, 2018. Jon McGinnis and David C. Reisman (eds.) Interpreting Avicenna: Science and Philosophy in Medieval Islam: Proceedings of the Second Conference of the Avicenna Study Group, Leiden: Brill, 2004. Michot, Jean R., La destinée de l'homme selon Avicenne, Louvain: Aedibus Peeters, 1986, . Nader El-Bizri, The Phenomenological Quest between Avicenna and Heidegger, Binghamton, N.Y.: Global Publications SUNY, 2000 (reprinted by SUNY Press in 2014 with a new Preface). Nader El-Bizri, "Avicenna and Essentialism," Review of Metaphysics, Vol. 54 (June 2001), pp. 753–778. Nader El-Bizri, "Avicenna's De Anima between Aristotle and Husserl," in The Passions of the Soul in the Metamorphosis of Becoming, ed. Anna-Teresa Tymieniecka, Dordrecht: Kluwer, 2003, pp. 67–89. Nader El-Bizri, "Being and Necessity: A Phenomenological Investigation of Avicenna's Metaphysics and Cosmology," in Islamic Philosophy and Occidental Phenomenology on the Perennial Issue of Microcosm and Macrocosm, ed. Anna-Teresa Tymieniecka, Dordrecht: Kluwer, 2006, pp. 243–261. Nader El-Bizri, 'Ibn Sīnā's Ontology and the Question of Being', Ishrāq: Islamic Philosophy Yearbook 2 (2011), 222–237 Nader El-Bizri, 'Philosophising at the Margins of 'Sh'i Studies': Reflections on Ibn Sīnā's Ontology', in The Study of Sh'i Islam. History, Theology and Law, eds. F. Daftary and G. Miskinzoda (London: I.B. Tauris, 2014), pp. 585–597. Reisman, David C. (ed.), Before and After Avicenna: Proceedings of the First Conference of the Avicenna Study Group'', Leiden: Brill, 2003. External links Avicenna (Ibn-Sina) on the Subject and the Object of Metaphysics with a list of translations of the logical and philosophical works and an annotated bibliography 980s births Year of birth unknown 1037 deaths 11th-century astronomers 11th-century Persian-language poets 11th-century philosophers 11th-century Iranian physicians Alchemists of the medieval Islamic world Aristotelian philosophers Burials in Iran Buyid viziers Classical humanists Critics of atheism Epistemologists Iranian music theorists Islamic philosophers Transoxanian Islamic scholars Logicians People from Bukhara Region Pharmacologists of medieval Iran Musical theorists of the medieval Islamic world Ontologists People from Khorasan Persian physicists Philosophers of logic Philosophers of mind Philosophers of psychology Philosophers of religion Philosophers of science Samanid scholars Unani medicine Iranian logicians Iranian ethicists Samanid officials Philosophers of mathematics	5
The Men's Ashes is a Test cricket series played biennially between England and Australia. The term originated in a satirical obituary published in a British newspaper, The Sporting Times, immediately after Australia's 1882 victory at The Oval, its first Test win on English soil. The obituary stated that English cricket had died, and that "the body will be cremated and the ashes taken to Australia". The mythical ashes immediately became associated with the 1882–83 series played in Australia, before which the English captain Ivo Bligh had vowed to "regain those ashes". The English media therefore dubbed the tour the quest to regain the Ashes. After England had won two of the three Tests on the tour, a small urn was presented to Bligh in Melbourne. The contents of the urn are reputed to be the ashes of a wooden bail, and were humorously described as "the ashes of Australian cricket". It is not clear whether that "tiny silver urn" is the same as the small terracotta urn given to Marylebone Cricket Club (MCC) by Bligh's widow after his death in 1927. The Ashes urn has never been the official trophy of the series, having been a personal gift to Bligh. However, replicas of the urn are often held aloft by victorious teams as a symbol of their victory in an Ashes series. Since the 1998–99 Ashes series, a Waterford Crystal representation of the Ashes urn (called the Ashes Trophy) has been presented to the winners of an Ashes series as the official trophy of that series. Irrespective of which side holds the tournament, the original urn remains in the MCC Museum at Lord's; it has, however, been taken to Australia to be put on touring display on two occasions: as part of the Australian Bicentenary celebrations in 1988 and to accompany the Ashes series in 2006–07. An Ashes series traditionally consists of five Tests, hosted in turn by England and Australia at least once every two years. The Ashes are regarded as being held by the team that most recently won the series. If the series is drawn, the team that currently holds the Ashes "retains" the trophy. There have been 73 Ashes series. Australia have won 34 and retained six times from draws (40); England have won 32 and retained once (33). 1882 origins The first Test match between England and Australia was played in Melbourne, Australia, in 1877, though the Ashes legend started later, after the ninth Test, played in 1882. On their tour of England that year the Australians played just one Test, at the Oval in London. It was a low-scoring affair on a difficult wicket. Australia made a mere 63 runs in their first innings, and England, led by A. N. Hornby, took a 38-run lead with a total of 101. In their second innings, Australia, boosted by a spectacular 55 runs off 60 deliveries from Hugh Massie, managed 122, which left England only 85 runs to win. The Australians were greatly demoralised by the manner of their second-innings collapse, but fast bowler Fred Spofforth, spurred on by the gamesmanship of his opponents, in particular W. G. Grace, refused to give in. "This thing can be done," he declared. Spofforth went on to devastate the English batting, taking his final four wickets for only two runs to leave England just eight runs short of victory. When Ted Peate, England's last batsman, came to the crease, his side needed just ten runs to win, but Peate managed only two before he was bowled by Harry Boyle. An astonished Oval crowd fell silent, struggling to believe that England could possibly have lost on home soil. When it finally sank in, the crowd swarmed onto the field, cheering loudly and chairing Boyle and Spofforth to the pavilion. When Peate returned to the pavilion he was reprimanded by his captain for not allowing his partner, Charles Studd (one of the best batsmen in England, having already hit two centuries that season against the colonists), to get the runs. Peate humorously replied, "I had no confidence in Mr Studd, sir, so thought I had better do my best." The momentous defeat was widely recorded in the British press, which praised the Australians for their plentiful "pluck" and berated the Englishmen for their lack thereof. A celebrated poem appeared in Punch on Saturday, 9 September. The first verse, quoted most frequently, reads: Well done, Cornstalks! Whipt us Fair and square, Was it luck that tript us? Was it scare? Kangaroo Land's 'Demon', or our own Want of 'devil', coolness, nerve, backbone? On 31 August, in the Charles Alcock-edited magazine Cricket: A Weekly Record of The Game, there appeared a mock obituary: On 2 September a more celebrated mock obituary, written by Reginald Shirley Brooks, appeared in The Sporting Times. It read: Ivo Bligh promised that on the 1882–83 tour of Australia, he would, as England's captain, "recover those Ashes". He spoke of them several times over the course of the tour, and the Australian media quickly caught on. The three-match series resulted in a two-one win to England, notwithstanding a fourth match, won by the Australians, whose status remains a matter of ardent dispute. In the 20 years following Bligh's campaign the term "the Ashes" largely disappeared from public use. There is no indication that this was the accepted name for the series, at least not in England. The term became popular again in Australia first, when George Giffen, in his memoirs (With Bat and Ball, 1899), used the term as if it were well known. The true and global revitalisation of interest in the concept dates from 1903, when Pelham Warner took a team to Australia with the promise that he would regain "the ashes". As had been the case on Bligh's tour 20 years before, the Australian media latched fervently onto the term and, this time, it stuck. Having fulfilled his promise, Warner published a book entitled How We Recovered the Ashes. Although the origins of the term are not referred to in the text, the title served (along with the general hype created in Australia) to revive public interest in the legend. The first mention of "the Ashes" in Wisden Cricketers' Almanack occurs in 1905, while Wisden'''s first account of the legend is in the 1922 edition. Urn It took many years before the contests between England and Australia were consistently called "The Ashes", and so there was no concept of either a trophy or a physical representation of the ashes. As late as 1925, the following verse appeared in The Cricketers Annual: So here's to Chapman, Hendren and Hobbs, Gilligan, Woolley and Hearne May they bring back to the Motherland, The ashes which have no urn! Nevertheless, several attempts had been made to embody the Ashes in a physical memorial. Examples include one presented to Warner in 1904, another to Australian captain M. A. Noble in 1909, and another to Australian captain W. M. Woodfull in 1934. The oldest, and the one to enjoy enduring fame, was the one presented to Bligh, later Lord Darnley, during the 1882–83 tour. The precise nature of the origin of this urn is a matter of dispute. Based on a statement by Darnley in 1894, it was believed that a group of Victorian ladies, including Darnley's later wife Florence Morphy, made the presentation after the victory in the Third Test in 1883. More recent researchers, in particular Ronald Willis and Joy Munns have studied the tour in detail and concluded that the presentation was made after a private cricket match played over Christmas 1882 when the English team were guests of Sir William Clarke, at his property "Rupertswood", in Sunbury, Victoria. This was before the matches had started. The prime evidence for this theory was provided by a descendant of Clarke. In August 1926 Ivo Bligh (now Lord Darnley) displayed the Ashes urn at the Morning Post Decorative Art Exhibition held in the Central Hall, Westminster. He made the following statement about how he was given the urn: A more detailed account of how the Ashes were given to Ivo Bligh was outlined by his wife, the Countess of Darnley, in 1930 during a speech at a cricket luncheon. Her speech was reported by the Times as follows: There is another statement which is not totally clear made by Lord Darnley in 1921 about the timing of the presentation of the urn. He was interviewed in his home at Cobham Hall by Montague Grover and the report of this interview was as follows: He made a similar statement in 1926. The report of this statement in the Brisbane Courier was as follows: The contents of the urn are also problematic; they were variously reported to be the remains of a stump, bail or the outer casing of a ball, but in 1998 Darnley's 82-year-old daughter-in-law said they were the remains of her mother-in-law's veil, casting a further layer of doubt on the matter. However, during the tour of Australia in 2006/7, the MCC official accompanying the urn said the veil legend had been discounted, and it was now "95% certain" that the urn contains the ashes of a cricket bail. Speaking on Channel Nine TV on 25 November 2006, he said x-rays of the urn had shown the pedestal and handles were cracked, and repair work had to be carried out. The urn is made of terracotta and is about tall and may originally have been a perfume jar. A label containing a six-line verse is pasted on the urn. This is the fourth verse of a song-lyric published in the Melbourne Punch on 1 February 1883: When Ivo goes back with the urn, the urn; Studds, Steel, Read and Tylecote return, return; The welkin will ring loud, The great crowd will feel proud, Seeing Barlow and Bates with the urn, the urn; And the rest coming home with the urn. In February 1883, just before the disputed Fourth Test, a velvet bag made by Mrs Ann Fletcher, the daughter of Joseph Hines Clarke and Marion Wright, both of Dublin, was given to Bligh to contain the urn. During Darnley's lifetime there was little public knowledge of the urn, and no record of a published photograph exists before 1921. The Illustrated London News published this photo in January 1921 (shown above). When Darnley died in 1927 his widow presented the urn to the Marylebone Cricket Club and that was the key event in establishing the urn as the physical embodiment of the legendary ashes. MCC first displayed the urn in the Long Room at Lord's and since 1953 in the MCC Cricket Museum at the ground. MCC's wish for it to be seen by as wide a range of cricket enthusiasts as possible has led to its being mistaken for an official trophy. It is in fact a private memento, and for this reason it is never awarded to either England or Australia, but is kept permanently in the MCC Cricket Museum where it can be seen together with the specially made red and gold velvet bag and the scorecard of the 1882 match. Because the urn itself is so delicate, it has been allowed to travel to Australia only twice. The first occasion was in 1988 for a museum tour as part of the Australian Bicentenary celebrations; the second was for the 2006/7 Ashes series. The urn arrived on 17 October 2006, going on display at the Museum of Sydney. It then toured to other states, with the final appearance at the Tasmanian Museum and Art Gallery on 21 January 2007. In the 1990s, given Australia's long dominance of the Ashes and the popular acceptance of the Darnley urn as "the Ashes", the idea was mooted that the victorious team should be awarded the urn as a trophy and allowed to retain it until the next series. As its condition is fragile and it is a prized exhibit at the MCC Cricket Museum, the MCC would not agree. Furthermore, in 2002, Bligh's great-great-grandson Lord Clifton, the heir-apparent to the Earldom of Darnley, argued that the Ashes urn should not be returned to Australia because it belonged to his family and was given to the MCC only for safe keeping. As a compromise, the MCC commissioned a larger replica of the urn in Waterford Crystal, known as the Ashes Trophy, to award to the winning team of each series starting with the 1998–99 Ashes. This did little to diminish the status of the Darnley urn as the most important icon in cricket, the symbol of this old and keenly fought contest. Series and matches Quest to "recover those ashes" Later in 1882, following the famous Australian victory at The Oval, Bligh led an England team to Australia, as he said, to "recover those ashes". Publicity surrounding the series was intense, and it was at some time during this series that the Ashes urn was crafted. Australia won the First Test by nine wickets, but in the next two England were victorious. At the end of the Third Test, England were generally considered to have "won back the Ashes" 2–1. A fourth match was played, against a "United Australian XI", which was arguably stronger than the Australian sides that had competed in the previous three matches; this game, however, is not generally considered part of the 1882–83 series. It is counted as a Test, but as a standalone. This match ended in a victory for Australia. 1884 to 1896 After Bligh's victory, there was an extended period of English dominance. The tours generally had fewer Tests in the 1880s and 1890s than people have grown accustomed to in more recent years, the first five-Test series taking place only in 1894–95. England lost only four Ashes Tests in the 1880s out of 23 played, and they won all the seven series contested. There was more chopping and changing in the teams, given that there was no official board of selectors for each country (in 1887–88, two separate English teams were on tour in Australia) and popularity with the fans varied. The 1890s games were more closely fought, Australia taking its first series win since 1882 with a 2–1 victory in 1891–92. But England dominated, winning the next three series to 1896 despite continuing player disputes. The 1894–95 series began in sensational fashion when England won the First Test at Sydney by just 10 runs having followed on. Australia had scored a massive 586 (Syd Gregory 201, George Giffen 161) and then dismissed England for 325. But England responded with 437 and then dramatically dismissed Australia for 166 with Bobby Peel taking 6 for 67. At the close of the second last day's play, Australia were 113–2, needing only 64 more runs. But heavy rain fell overnight and next morning the two slow left-arm bowlers, Peel and Johnny Briggs, were all but unplayable. England went on to win the series 3–2 after it had been all square before the Final Test, which England won by 6 wickets. The English heroes were Peel, with 27 wickets in the series at an average of 26.70, and Tom Richardson, with 32 at 26.53. In 1896, England under the captaincy of W. G. Grace won the series 2–1, and this marked the end of England's longest period of Ashes dominance. 1897 to 1902 Australia resoundingly won the 1897–98 series by 4–1 under the captaincy of Harry Trott. His successor Joe Darling won the next three series in 1899, 1901–02, and the classic 1902 series, which became one of the most famous in the history of Test cricket. Five matches were played in 1902 but the first two were drawn after being hit by bad weather. In the First Test (the first played at Edgbaston), after scoring 376 England bowled out Australia for 36 (Wilfred Rhodes 7/17) and reduced them to 46–2 when they followed on. Australia won the Third and Fourth Tests at Bramall Lane and Old Trafford respectively. At Old Trafford, Australia won by just 3 runs after Victor Trumper had scored 104 on a "bad wicket", reaching his hundred before lunch on the first day. England won the last Test at The Oval by one wicket. Chasing 263 to win, they slumped to 48–5 before Gilbert Jessop's 104 gave them a chance. He reached his hundred in just 75 minutes. The last-wicket pair of George Hirst and Rhodes were required to score 15 runs for victory. When Rhodes joined him, Hirst reportedly said: "We'll get them in singles, Wilfred." In fact, they scored thirteen singles and a two. The period of Darling's captaincy saw the emergence of outstanding Australian players such as Trumper, Warwick Armstrong, James Kelly, Monty Noble, Clem Hill, Hugh Trumble and Ernie Jones. Reviving the legend After what the MCC saw as the problems of the earlier professional and amateur series they decided to take control of organising tours themselves, and this led to the first MCC tour of Australia in 1903–04. England won it against the odds, and Plum Warner, the England captain, wrote up his version of the tour in his book How We Recovered The Ashes. The title of this book revived the Ashes legend and it was after this that England v Australia series were customarily referred to as "The Ashes". 1905 to 1912 England and Australia were evenly matched until the outbreak of the First World War in 1914. Five more series took place between 1905 and 1912. In 1905, England's captain Stanley Jackson not only won the series 2–0, but also won the toss in all five matches and headed both the batting and the bowling averages. Monty Noble led Australia to victory in both 1907–08 and 1909. Then England won in 1911–12 by four matches to one. Jack Hobbs establishing himself as England's first-choice opening batsman with three centuries, while Frank Foster (32 wickets at 21.62) and Sydney Barnes (34 wickets at 22.88) formed a formidable bowling partnership. England retained the Ashes when it won the 1912 Triangular Tournament, which also featured South Africa. The Australian touring party had been severely weakened by a dispute between the board and players that caused Clem Hill, Victor Trumper, Warwick Armstrong, Tibby Cotter, Sammy Carter and Vernon Ransford to be omitted. 1920 to 1933 After the war, Australia took firm control of both the Ashes and world cricket. For the first time, the tactic of using two express bowlers in tandem paid off as Jack Gregory and Ted McDonald crippled the English batting on a regular basis. Australia recorded overwhelming victories both in England and on home soil. It won the first eight matches in succession including a 5–0 whitewash in 1920–1921 at the hands of Warwick Armstrong's team. The ruthless and belligerent Armstrong led his team back to England in 1921 where his men lost only two games late in the tour to narrowly miss out of being the first team to complete a tour of England without defeat. England won only one Test out of 15 from the end of the war until 1925. In a rain-hit series in 1926, England managed to eke out a 1–0 victory with a win in the final Test at The Oval. Because the series was at stake, the match was to be "timeless", i.e., played to a finish. Australia had a narrow first innings lead of 22. Jack Hobbs and Herbert Sutcliffe took the score to 49–0 at the end of the second day, a lead of 27. Heavy rain fell overnight, and next day the pitch soon developed into a traditional sticky wicket. England seemed doomed to be bowled out cheaply and to lose the match. In spite of the very difficult batting conditions, however, Hobbs and Sutcliffe took their partnership to 172 before Hobbs was out for exactly 100. Sutcliffe went on to make 161 and England won the game comfortably. Australian captain Herbie Collins was stripped of all captaincy positions down to club level, and some accused him of throwing the match. Australia's ageing post-war team broke up after 1926, with Collins, Charlie Macartney and Warren Bardsley all departing, and Gregory breaking down at the start of the 1928–29 series. Despite the debut of Donald Bradman, the inexperienced Australians, led by Jack Ryder, were heavily defeated, losing 4–1. England had a very strong batting side, with Wally Hammond contributing 905 runs at an average of 113.12, and Hobbs, Sutcliffe and Patsy Hendren all scoring heavily; the bowling was more than adequate, without being outstanding. In 1930, Bill Woodfull led an extremely inexperienced team to England. Bradman fulfilled his promise in the 1930 series when he scored 974 runs at 139.14, which remains a world record Test series aggregate. A modest Bradman can be heard in a 1930 recording saying "I have always endeavoured to do my best for the side, and the few centuries that have come my way have been achieved in the hope of winning matches. My one idea when going into bat was to make runs for Australia." In the Headingley Test, he made 334, reaching 309* at the end of the first day, including a century before lunch. Bradman himself thought that his 254 in the preceding match, at Lord's, was a better innings. England managed to stay in contention until the deciding final Test at The Oval, but yet another double hundred by Bradman, and 7/92 by Percy Hornibrook in England's second innings, enabled Australia to win by an innings and take the series 2–1. Clarrie Grimmett's 29 wickets at 31.89 for Australia in this high-scoring series were also important. Australia had one of the strongest batting line-ups ever in the early 1930s, with Bradman, Archie Jackson, Stan McCabe, Bill Woodfull, Bill Ponsford and Jack Fingleton. It was the prospect of bowling at this line-up that caused England's 1932–33 captain Douglas Jardine to adopt the tactic of fast leg theory, better known as Bodyline. Jardine instructed his fast bowlers, most notably Harold Larwood and Bill Voce, to bowl at the bodies of the Australian batsmen, with the goal of forcing them to defend their bodies with their bats, thus providing easy catches to a stacked leg-side field. Jardine insisted that the tactic was legitimate and called it "leg theory" but it was widely disparaged by its opponents, who dubbed it "Bodyline" (from "on the line of the body"). Although England decisively won the Ashes 4–1, Bodyline caused such a furore in Australia that diplomats had to intervene to prevent serious harm to Anglo-Australian relations, and the MCC eventually changed the Laws of cricket to curtail the number of leg side fielders. Jardine's comment was: "I've not travelled 6,000 miles to make friends. I'm here to win the Ashes". Some of the Australians wanted to use Bodyline in retaliation, but Woodfull flatly refused. He famously told England manager Pelham Warner, "There are two teams out there. One is playing cricket; the other is making no attempt to do so" after the latter had come into the Australian rooms to express sympathy after a Larwood bouncer had struck the Australian skipper in the heart and felled him. 1934 to 1953 On the batting-friendly wickets that prevailed in the late 1930s, most Tests up to the Second World War still gave results. It should be borne in mind that Tests in Australia prior to the war were all played to a finish, with many batting records set during this period. The 1934 Ashes series began with the notable absence of Larwood, Voce and Jardine. The MCC had made it clear, in light of the revelations of the bodyline series, that these players would not face Australia. The MCC, although it had earlier condoned and encouraged bodyline tactics in the 1932–33 series, laid the blame on Larwood when relations turned sour. Larwood was forced by the MCC to either apologise or be removed from the Test side. He went for the latter. Australia recovered the Ashes in 1934 and held them until 1953, though no Test cricket was played during the Second World War. As in 1930, the 1934 series was decided in the final Test at The Oval. Australia, batting first, posted a massive 701 in the first innings. Bradman (244) and Ponsford (266) were in record-breaking form with a partnership of 451 for the second wicket. England eventually faced a massive 707-run target for victory and failed, Australia winning the series 2–1. This made Woodfull the only captain to regain the Ashes and he retired upon his return to Australia. In 1936–37 Bradman succeeded Woodfull as Australian captain. He started badly, losing the first two Tests heavily after Australia were caught on sticky wickets. However, the Australians fought back and Bradman won his first series in charge 3–2. The 1938 series was a high-scoring affair with two high-scoring draws, resulting in a 1–1 result, Australia retaining the Ashes. After the first two matches ended in stalemate and the Third Test at Old Trafford never started due to rain, Australia then scraped home by five wickets inside three days in a low-scoring match at Headingley to retain the urn. In the timeless Fifth Test at The Oval, the highlight was Len Hutton's then world-record score of 364 as England made 903-7 declared. Bradman and Jack Fingleton injured themselves during Hutton's marathon effort, and with only nine men, Australia fell to defeat by an innings and 579 runs, the heaviest in Test history. The Ashes resumed after the war when England toured in 1946–47 and, as in 1920–21, found that Australia had made the better post-war recovery. Still captained by Bradman and now featuring the potent new-ball partnership of Ray Lindwall and Keith Miller, Australia were convincing 3–0 winners. Aged 38 and having been unwell during the war, Bradman had been reluctant to play. He batted unconvincingly and reached 28 when he hit a ball to Jack Ikin; England believed it was a catch, but Bradman stood his ground, believing it to be a bump ball. The umpire ruled in the Australian captain's favour and he appeared to regain his fluency of yesteryear, scoring 187. Australia promptly seized the initiative, won the First Test convincingly and inaugurated a dominant post-war era. The controversy over the Ikin catch was one of the biggest disputes of the era. In 1948, Australia set new standards, completely outplaying its hosts to win 4–0 with one draw. This Australian team, led by Bradman, who turned 40 during his final tour of England, has gone down in history as The Invincibles. Playing 34 matches on tour—three of which were not first-class—and including the five Tests, they remained unbeaten, winning 27 and drawing 7. Bradman's men were greeted by packed crowds across the country, and records for Test attendances in England were set in the Second and Fourth Tests at Lord's and Headingley respectively. Before a record attendance of spectators at Headingley, Australia set a world record by chasing down 404 on the last day for a seven-wicket victory. The 1948 series ended with one of the most poignant moments in cricket history, as Bradman played his final innings for Australia in the Fifth Test at The Oval, needing to score only four runs to end with a career batting average of exactly 100. However, Bradman made a second-ball duck, bowled by an Eric Hollies googly that sent him into retirement with a career average of 99.94. Bradman was succeeded as Australian captain by Lindsay Hassett, who led the team to a 4–1 series victory in 1950–51. The series was not as one-sided as the number of wins suggest, with several tight matches. The tide finally turned in 1953 when England won the final Test at The Oval to take the series 1–0, having narrowly avoided defeat in the preceding Test at Headingley. This was the beginning of one of the greatest periods in English cricket history with players such as captain Len Hutton, batsmen Denis Compton, Peter May, Tom Graveney, Colin Cowdrey, bowlers Fred Trueman, Brian Statham, Alec Bedser, Jim Laker, Tony Lock, wicket-keeper Godfrey Evans and all-rounder Trevor Bailey. 1954 to 1971 In 1954–55, Australia's batsmen had no answer to the pace of Frank Tyson and Statham. After winning the First Test by an innings after being controversially sent in by Hutton, Australia lost its way and England took a hat-trick of victories to win the series 3–1. A dramatic series in 1956 saw a record that will probably never be beaten: off-spinner Jim Laker's monumental effort at Old Trafford when he bowled 68 of 191 overs to take 19 out of 20 possible Australian wickets in the Fourth Test. It was Australia's second consecutive innings defeat in a wet summer, and the hosts were in strong positions in the two drawn Tests, in which half the playing time was washed out. Bradman rated the team that won the series 2–1 as England's best ever. England's dominance was not to last. Australia won 4–0 in 1958–59, having found a high-quality spinner of their own in new skipper Richie Benaud, who took 31 wickets in the five-Test series, and paceman Alan Davidson, who took 24 wickets at 19.00. The series was overshadowed by the furore over various Australian bowlers, most notably Ian Meckiff, whom the English management and media accused of illegally throwing Australia to victory. In 1961, Australia won a hard-fought series 2–1, their first Ashes series win in England for 13 years. After narrowly winning the Second Test at Lord's, dubbed "The Battle of the Ridge" because of a protrusion on the pitch that caused erratic bounce, Australia mounted a comeback on the final day of the Fourth Test at Old Trafford and sealed the series with Richie Benaud taking 6-70 during the English runchase. The tempo of the play changed over the next four series in the 1960s, held in 1962–63, 1964, 1965–66 and 1968. The powerful array of bowlers that both countries boasted in the preceding decade moved into retirement, and their replacements were of lesser quality, making it more difficult to force a result. England failed to win any series during the 1960s, a period dominated by draws as teams found it more prudent to save face than risk losing. Of the 20 Tests played during the four series, Australia won four and England three. As they held the Ashes, Australia's captains Bob Simpson and Bill Lawry were happy to adopt safety-first tactics and their strategy of sedate batting saw many draws. During this period, spectator attendances dropped and media condemnation increased, but Simpson and Lawry flatly disregarded the public dissatisfaction. It was in the 1960s that the bipolar dominance of England and Australia in world cricket was seriously challenged for the first time. West Indies defeated England twice in the mid-1960s and South Africa, in two series before they were banned for apartheid, completely outplayed Australia 3–1 and 4–0. Australia had lost 2–1 during a tour of the West Indies in 1964–65, the first time it had lost a series to any team other than England. In 1970–71, Ray Illingworth led England to a 2–0 win in Australia, mainly due to John Snow's fast bowling, and the prolific batting of Geoffrey Boycott and John Edrich. It was not until the last session of what was the 7th Test (one match having been abandoned without a ball bowled) that England's success was secured. Lawry was sacked after the Sixth Test after the selectors finally lost patience with Australia's lack of success and dour strategy. Lawry was not informed of the decision privately and heard his fate over the radio. 1972 to 1987 The 1972 series finished 2–2, with England under Illingworth retaining the Ashes. In the 1974–75 series, with the England team breaking up and their best batsman Geoff Boycott refusing to play, Australian pace bowlers Jeff Thomson and Dennis Lillee wreaked havoc. A 4–1 result was a fair reflection as England were left shell shocked. England then lost the 1975 series 0–1, but at least restored some pride under new captain Tony Greig. Australia won the 1977 Centenary Test which was not an Ashes contest, but then a storm broke as Kerry Packer announced his intention to form World Series Cricket. WSC affected all Test-playing nations but it weakened Australia especially as the bulk of its players had signed up with Packer; the Australian Cricket Board (ACB) would not select WSC-contracted players and an almost completely new Test team had to be formed. WSC came after an era during which the duopoly of Australian and English dominance dissipated; the Ashes had long been seen as a cricket world championship but the rise of the West Indies in the late 1970s challenged that view. The West Indies would go on to record resounding Test series wins over Australia and England and dominated world cricket until the 1990s. With Greig having joined WSC, England appointed Mike Brearley as its captain and he enjoyed great success against Australia. Largely assisted by the return of Boycott, Brearley's men won the 1977 series 3–0 and then completed an overwhelming 5–1 series win against an Australian side missing its WSC players in 1978–79. Allan Border made his Test debut for Australia in 1978–79. Brearley retired from Test cricket in 1980 and was succeeded by Ian Botham, who started the 1981 series as England captain, by which time the WSC split had ended. After Australia took a 1–0 lead in the first two Tests, Botham was forced to resign or was sacked (depending on the source). Brearley surprisingly agreed to be reappointed before the Third Test at Headingley. This was a remarkable match in which Australia looked certain to take a 2–0 series lead after it had forced England to follow-on 227 runs behind. England, despite being 135 for 7, produced a second innings total of 356, Botham scoring 149. Chasing just 130, Australia were sensationally dismissed for 111, Bob Willis taking 8–43. It was the first time since 1894–95 that a team following on had won a Test match. Under Brearley's leadership, England went on to win the next two matches before a drawn final match at The Oval. This series became known as 'Botham's Ashes' for his extraordinary feats with both bat and ball, after being dismissed as captain. In 1982–83 Australia had Greg Chappell back from WSC as captain, while the England team was weakened by the enforced omission of their South African tour rebels, particularly Graham Gooch and John Emburey. Australia went 2–0 up after three Tests, but England won the Fourth Test by 3 runs (after a 70-run last wicket stand) to set up the final decider, which was drawn. In 1985, David Gower's England team was strengthened by the return of Gooch and Emburey as well as the emergence at international level of Tim Robinson and Mike Gatting. Australia, now captained by Allan Border, had itself been weakened by a rebel South African tour, the loss of Terry Alderman being a particular factor. England won 3–1. Despite suffering heavy defeats against the West Indies during the 1980s, England continued to do well in the Ashes. Mike Gatting was the captain in 1986–87 but his team started badly and attracted some criticism. Then Chris Broad scored three hundreds in successive Tests and bowling successes from Graham Dilley and Gladstone Small meant England won the series 2–1. 1989 to 2003 The Australian team of 1989 was comparable to the great Australian teams of the past, and resoundingly defeated England 4–0. Well led by Allan Border, the team included the young cricketers Mark Taylor, Merv Hughes, David Boon, Ian Healy and Steve Waugh, who were all to prove long-serving and successful Ashes competitors. England, now led once again by David Gower, suffered from injuries and poor form. During the Fourth Test news broke that prominent England players had agreed to take part in a "rebel tour" of South Africa the following winter; three of them (Tim Robinson, Neil Foster and John Emburey) were playing in the match, and were subsequently dropped from the England side. Australia reached a cricketing peak in the 1990s and early 2000s, coupled with a general decline in England's fortunes. After re-establishing its credibility in 1989, Australia underlined its superiority with victories in the 1990–91, 1993, 1994–95, 1997, 1998–99, 2001 and 2002–03 series, all by convincing margins. Great Australian players in the early years included batsmen Border, Boon, Taylor and Steve Waugh. The captaincy passed from Border to Taylor in the mid-1990s and then to Steve Waugh before the 2001 series. In the latter part of the 1990s Waugh himself, along with his twin brother Mark, scored heavily for Australia and fast bowlers Glenn McGrath and Jason Gillespie made a serious impact, especially the former. The wicketkeeper-batsman position was held by Ian Healy for most of the 1990s and by Adam Gilchrist from 2001 to 2006–07. In the 2000s, batsmen Justin Langer, Damien Martyn and Matthew Hayden became noted players for Australia. But the most dominant Australian player was leg-spinner Shane Warne, whose first delivery in Ashes cricket in 1993, to dismiss Mike Gatting, became known as the Ball of the Century. Australia's record between 1989 and 2005 had a significant impact on the statistics between the two sides. Before the 1989 series began, the win–loss ratio was almost even, with 87 test wins for Australia to England's 86, 74 tests having been drawn. By the 2005 series Australia's test wins had increased to 115 whereas England's had increased to only 93 (with 82 draws). In the period between 1989 and the beginning of the 2005 series, the two sides had played 43 times; Australia winning 28 times, England 7 times, with 8 draws. Only a single England victory had come in a match in which the Ashes were still at stake, namely the First Test of the 1997 series. All others were consolation victories when the Ashes had been secured by Australia. 2005 to 2015 England were undefeated in Test matches through the 2004 calendar year. This elevated them to second in the ICC Test Championship. Hopes that the 2005 Ashes series would be closely fought proved well-founded, the series remaining undecided as the closing session of the final Test began. Experienced journalists including Richie Benaud rated the series as the most exciting in living memory. It has been compared with the great series of the distant past, such as 1894–95 and 1902. The First Test at Lord's was convincingly won by Australia, but in the remaining four matches the teams were evenly matched and England fought back to win the Second Test by 2 runs, the smallest winning margin in Ashes history, and the second-smallest in all Tests. The rain-affected Third Test ended with the last two Australian batsmen holding out for a draw; and England won the Fourth Test by three wickets after forcing Australia to follow-on for the first time in 191 Tests. A draw in the final Test gave England victory in an Ashes series for the first time in 18 years and their first Ashes victory at home since 1985. Australia regained the Ashes on its home turf in the 2006–07 series with a convincing 5–0 victory, only the second time an Ashes series had been won by that margin. Glenn McGrath, Shane Warne and Justin Langer retired from Test cricket after that series, while Damien Martyn retired during the series. The 2009 series began with a tense draw in the First Test at SWALEC Stadium in Cardiff, with England's last-wicket batsmen James Anderson and Monty Panesar surviving 69 balls. England then achieved its first Ashes win at Lord's since 1934 to go 1–0 up. After a rain-affected draw at Edgbaston, the fourth match at Headingley was convincingly won by Australia by an innings and 80 runs to level the series. Finally, England won the Fifth Test at The Oval by a margin of 197 runs to regain the Ashes. Andrew Flintoff retired from Test cricket soon afterwards. The 2010–11 series was played in Australia. The First Test at Brisbane ended in a draw, but England won the Second Test, at Adelaide, by an innings and 71 runs. Australia came back with a victory at Perth in the Third Test. In the Fourth Test at Melbourne Cricket Ground, England batting second scored 513 to defeat Australia (98 and 258) by an innings and 157 runs. This gave England an unbeatable 2–1 lead in the series and so it retained the Ashes. England went on to win the series 3–1, beating Australia by an innings and 83 runs at Sydney in the Fifth Test, including their highest innings total since 1938 (644). England's series victory was its first on Australian soil for 24 years. The 2010–11 Ashes series was the only one in which a team had won three Tests by innings margins and it was the first time England had scored 500 or more four times in a single series. England opener Cook scored 766 runs at average 127.66 in the series, the most dominant batsman in an Ashes series since Bradman in 1930. Australia's build-up to the 2013 Ashes series was far from ideal. Darren Lehmann took over as coach from Mickey Arthur following a string of poor results. A batting line-up weakened by the previous year's retirements of former captain Ricky Ponting and Mike Hussey was also shorn of opener David Warner, who was suspended for the start of the series following an off-field incident. England won a closely fought First Test by 14 runs, despite 19-year-old debutant Ashton Agar making a world-record 98 for a number 11 in the first innings. England then won a very one-sided Second Test by 347 runs while the rain-affected Third Test, held at a newly refurbished Old Trafford, was drawn, ensuring that England retained the Ashes. England won the Fourth Test by 74 runs after Australia lost their last eight second-innings wickets for only 86 runs. The final Test was drawn, giving England a 3–0 series win. In the second of two Ashes series held in 2013 (the series ended in 2014), this time hosted by Australia, the home team won the series five test matches to nil. This was the third time Australia has completed a clean sweep (or "whitewash") in Ashes history, a feat never matched by England. All six Australian specialist batsmen scored more runs than any Englishman with 10 centuries among them, with only debutant Ben Stokes scoring a century for England. Mitchell Johnson took 37 English wickets at 13.97 and Ryan Harris 22 wickets at 19.31 in the 5-Test series. Only Stuart Broad and all-rounder Stokes bowled effectively for England, with their spinner Graeme Swann retiring due to a chronic elbow injury after the decisive Third Test. Australia came into the 2015 Ashes series in England as favourites to retain the Ashes. Although England won the first Test in Cardiff, Australia won comfortably in the second Test at Lords. In the next two Tests, the Australian batsmen struggled, being bowled out for 136 in the first innings at Edgbaston, with England proceeding to win by eight wickets. This was followed by Australia being bowled out for 60 as Stuart Broad took five wickets and finished the spell with 8 for 15 in the first innings at Trent Bridge, the quickest – in terms of balls faced – a team has been bowled out in the first innings of a Test match. With victory by an innings and 78 runs on the morning of the third day of the Fourth Test, England regained the Ashes. 2017 to present During the buildup, the 2017–18 Ashes series was regarded as a turning point for both sides. Australia were criticised for being too reliant on captain Steve Smith and vice-captain David Warner, while England was said to have a shoddy middle to lower order. Off the field, England all-rounder Ben Stokes was ruled out of the side indefinitely due to a police investigation. Australia won the first Test match in Brisbane by 10 wickets and the second Test at Adelaide by 120 runs in the first ever day-night Ashes test match. Australia regained The Ashes with an innings and 41 run win in the third Test at Perth; the final Ashes Test at the WACA Ground. Prior to the 2019 Ashes series, both teams were considered to have very strong bowling attacks but struggling batting orders. Australia had its top-order batsmen David Warner, Steve Smith and Cameron Bancroft available for international selection after being banned from international cricket for 9–12 months following the ball-tampering scandal in South Africa, during which time India had won its first ever Test series in Australia. However, Australia recovered to win the Test series against Sri Lanka 2–0. Despite winning the Cricket World Cup in July 2019 for the first time, England had also been criticised for its fragile top-order in Tests. The retirement of opener Alastair Cook in August 2018 ensured potential top-order batsmen Rory Burns, Joe Denly and Jason Roy were able to secure a place in the side. Despite losing a Test series 2–1 in their tour of the West Indies, England then improved to win the one-off Test against Ireland, by 143 runs. The 2019 series was eventually drawn 2–2, with Australia retaining the Ashes. The 2021 Ashes series was played from December 2021 through January 2022, and featured the first Ashes Test match to be played in Tasmania, at Hobart's Bellerive Oval. Australia retained the Ashes in the 2021–22 Ashes series, after comfortably beating England 4–0. England were the hosts of five Test matches of the 2023 Ashes series. The series got off to a good start for Australia as they won the first two Tests to go 0-2 up. The hosts won the third Test to put the series at 1-2 for the visitors. England needed to win the fourth Test in a hope to not only level the series but prevent Australia from retaining the Ashes. The match looked good for England to win, but rain intervened on the last two days and forced a draw, thus Australia retained the Ashes with the series at 1-2 after four Tests. The fifth and final Test was played at The Oval. During the contest Stuart Broad announced that he would retire from cricket at the end of the match. England went on to win the final Test match to draw the series at 2-2. Summary of results and statistics In the 140 years since 1883, Australia have held the Ashes for approximately 84.5 years, and England for 55.5 years: Test results, up to and including 31 July 2023: Series results, up to and including 31 July 2023: A team must win a series to gain the right to hold the Ashes. A drawn series results in the previous holders retaining the Ashes. Ashes series have generally been played over five Test matches, although there have been four-match series (1938 and 1975) and six-match series (1970–71, 1974–75, 1978–79, 1981, 1985, 1989, 1993 and 1997). Australians have made 264 centuries in Ashes Tests, of which 23 have been scores over 200, while Englishmen have scored 212 centuries, of which 10 have been over 200. Australians have taken 10 wickets in a match on 41 occasions, Englishmen 38 times. Match venues The series alternates between England (and Wales) and Australia, and each match of a series is held at a different ground. Australia In Australia, the grounds currently used are The Gabba in Brisbane (first staged an England–Australia Test in the 1932–33 season), Adelaide Oval (1884–85), the Melbourne Cricket Ground (MCG) (1876–77), and the Sydney Cricket Ground (SCG) (1881–82). A single Test was held at the Brisbane Exhibition Ground in 1928–29. Traditionally, Melbourne hosts the Boxing Day Test and Sydney hosts the New Year's Day Test. Additionally the WACA in Perth (1970–71) hosted its final Ashes Test in 2017–18 and was due to be replaced by Perth Stadium for the 2021–22 series. However, Western Australian border restrictions and quarantine requirements during the COVID-19 pandemic led to a change in venue for the final Ashes Test to Bellerive Oval in Hobart. This was the first Ashes Test match to be held in Tasmania. Cricket Australia proposed that the 2010–11 series consist of six Tests, with the additional game to be played at Bellerive Oval in Hobart. The England and Wales Cricket Board declined and the series was played over five Tests. England In England and Wales, the grounds currently used are: Old Trafford in Manchester (1884), The Oval in Kennington, South London (1884); Lord's in St John's Wood, North London (1884); Headingley in Leeds (1899) and Edgbaston in Birmingham (1902). Additionally Sophia Gardens in Cardiff, Wales (2009); the Riverside Ground in Chester-le-Street, County Durham (2013) and Trent Bridge at West Bridgford (1899), have been used and one Test was also held at Bramall Lane in Sheffield in 1902. Traditionally the final Test of the series is played at the Oval. Sophia Gardens and the Riverside were excluded as Test grounds between the years of 2020 and 2031 and therefore will not host an Ashes Test until at least 2035. The ECB announced the 2027 and 2031 Ashes series venues will be held at Lord's (2027 and 2031), The Oval (2027 and 2031), Edgbaston (2027), Trent Bridge (2027 and 2031), The Rose Bowl (2027), Old Trafford (2031) and Headingley (2031). Including abandoned tests †County cricket clubs who play at the grounds ‡Former grounds which no longer host Test Matches Cultural references The popularity and reputation of the cricket series has led to other sports and games using the name "Ashes" for contests between England/Great Britain and Australia. The best-known and longest-running of these events is the rugby league Ashes competition between Great Britain now England and Australia national rugby league teams. Use of the name "Ashes" was suggested by the Australian team when rugby league matches between the two countries commenced in 1908. Other examples included the television game shows Gladiators and Sale of the Century, both of which broadcast special editions containing contestants from the Australian and English versions of the shows competing against each other. The term became further genericised in Australia in the first half of the twentieth century, and was used to describe many sports rivalries or competitions outside the context of Australia vs England. The Australian rules football interstate carnival, and the small silver casket which served as its trophy, were symbolically known as "the Ashes" of Australian football, and was spoken of as such until at least the 1940s. The soccer rivalry between Australia and New Zealand was described as "the soccer ashes of Australasia" until as late as the 1950s; ashes from cigars smoked by the two countries' captains were put into a casket in 1923 to make the trophy literal. The interstate rugby league rivalry between Queensland and New South Wales was known for a time as Australia's rugby league ashes, and bowls competitions between the two states also regularly used the term. Even some local rivalries, such as southern Western Australia's annual Great Southern Football Carnival, were locally described as "the ashes". This genericised usage is no longer common, and "the Ashes" would today be assumed only to apply to a contest between Australia and England. The Ashes featured in the film The Final Test, released in 1953, based on a television play by Terence Rattigan. It stars Jack Warner as an England cricketer playing the last Test of his career, which is the last of an Ashes series; the film includes cameo appearances of English captain Len Hutton and other players who were part of England's 1953 triumph. Douglas Adams's 1982 science fiction comedy novel Life, the Universe and Everything – the third part of The Hitchhiker's Guide to the Galaxy series – features the urn containing the Ashes as a significant element of its plot. The urn is stolen by alien robots, as the burnt stump inside is part of a key needed to unlock the "Wikkit Gate" and release an imprisoned world called Krikkit.Bodyline, a fictionalised television miniseries based on the "Bodyline" Ashes series of 1932–33, was screened in Australia in 1984. The cast included Gary Sweet as Donald Bradman and Hugo Weaving as England captain Douglas Jardine. In the 1938 film The Lady Vanishes, Charters and Caldicott, played by Basil Radford and Naunton Wayne are two cricket fans who are desperate to get home from Europe in order to see the last day's play in the Third Test at Manchester. It is not until they see a newsboy's poster near the end of the film that they discover that the match had been abandoned, due to floods. See also History of Test cricket from 1877 to 1883 History of Test cricket from 1884 to 1889 History of Test cricket from 1890 to 1900 The Women's Ashes Ella-Mobbs Trophy (the Rugby Union equivalent of England-Australia matches) Notes References Further reading Willis, R. Cricket's Biggest Mystery: The Ashes , The Lutterworth Press (1987), . Other Wisden's Cricketers Almanack'' (various editions) External links Ashes to Ashes An audio history of the first hundred years of the Ashes, narrated by John Arlott Cricinfo's Ashes website The Origin of the Ashes – Rex Harcourt Listen to a young Don Bradman speaking after the 1930 Ashes tour Australia in international cricket Cricket awards and rankings Cricket rivalries England in international cricket Recurring events established in 1882 Recurring sporting events established in 1882 Test cricket competitions	6
Analysis (: analyses) is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (384–322 B.C.), though analysis as a formal concept is a relatively recent development. The word comes from the Ancient Greek (analysis, "a breaking-up" or "an untying;" from ana- "up, throughout" and lysis "a loosening"). From it also comes the word's plural, analyses. As a formal concept, the method has variously been ascribed to Alhazen, René Descartes (Discourse on the Method), and Galileo Galilei. It has also been ascribed to Isaac Newton, in the form of a practical method of physical discovery (which he did not name). The converse of analysis is synthesis: putting the pieces back together again in a new or different whole. Applications Science The field of chemistry uses analysis in three ways: to identify the components of a particular chemical compound (qualitative analysis), to identify the proportions of components in a mixture (quantitative analysis), and to break down chemical processes and examine chemical reactions between elements of matter. For an example of its use, analysis of the concentration of elements is important in managing a nuclear reactor, so nuclear scientists will analyze neutron activation to develop discrete measurements within vast samples. A matrix can have a considerable effect on the way a chemical analysis is conducted and the quality of its results. Analysis can be done manually or with a device. Types of Analysis: A) Qualitative Analysis: It is concerned with which components are in a given sample or compound. Example: Precipitation reaction B) Quantitative Analysis: It is to determine the quantity of individual component present in a given sample or compound. Example: To find concentration by uv-spectrophotometer. Isotopes Chemists can use isotope analysis to assist analysts with issues in anthropology, archeology, food chemistry, forensics, geology, and a host of other questions of physical science. Analysts can discern the origins of natural and man-made isotopes in the study of environmental radioactivity. Business Financial statement analysis – the analysis of the accounts and the economic prospects of a firm Financial analysis – refers to an assessment of the viability, stability, and profitability of a business, sub-business or project Gap analysis – involves the comparison of actual performance with potential or desired performance of an organization Business analysis – involves identifying the needs and determining the solutions to business problems Price analysis – involves the breakdown of a price to a unit figure Market analysis – consists of suppliers and customers, and price is determined by the interaction of supply and demand Sum-of-the-parts analysis – method of valuation of a multi-divisional company Opportunity analysis – consists of customers trends within the industry, customer demand and experience determine purchasing behavior Computer science Requirements analysis – encompasses those tasks that go into determining the needs or conditions to meet for a new or altered product, taking account of the possibly conflicting requirements of the various stakeholders, such as beneficiaries or users. Competitive analysis (online algorithm) – shows how online algorithms perform and demonstrates the power of randomization in algorithms Lexical analysis – the process of processing an input sequence of characters and producing as output a sequence of symbols Object-oriented analysis and design – à la Booch Program analysis (computer science) – the process of automatically analysing the behavior of computer programs Semantic analysis (computer science) – a pass by a compiler that adds semantical information to the parse tree and performs certain checks Static code analysis – the analysis of computer software that is performed without actually executing programs built from that Structured systems analysis and design methodology – à la Yourdon Syntax analysis – a process in compilers that recognizes the structure of programming languages, also known as parsing Worst-case execution time – determines the longest time that a piece of software can take to run Economics Agroecosystem analysis Input–output model if applied to a region, is called Regional Impact Multiplier System Engineering Analysts in the field of engineering look at requirements, structures, mechanisms, systems and dimensions. Electrical engineers analyse systems in electronics. Life cycles and system failures are broken down and studied by engineers. It is also looking at different factors incorporated within the design. Intelligence The field of intelligence employs analysts to break down and understand a wide array of questions. Intelligence agencies may use heuristics, inductive and deductive reasoning, social network analysis, dynamic network analysis, link analysis, and brainstorming to sort through problems they face. Military intelligence may explore issues through the use of game theory, Red Teaming, and wargaming. Signals intelligence applies cryptanalysis and frequency analysis to break codes and ciphers. Business intelligence applies theories of competitive intelligence analysis and competitor analysis to resolve questions in the marketplace. Law enforcement intelligence applies a number of theories in crime analysis. Linguistics Linguistics explores individual languages and language in general. It breaks language down and analyses its component parts: theory, sounds and their meaning, utterance usage, word origins, the history of words, the meaning of words and word combinations, sentence construction, basic construction beyond the sentence level, stylistics, and conversation. It examines the above using statistics and modeling, and semantics. It analyses language in context of anthropology, biology, evolution, geography, history, neurology, psychology, and sociology. It also takes the applied approach, looking at individual language development and clinical issues. Literature Literary criticism is the analysis of literature. The focus can be as diverse as the analysis of Homer or Freud. While not all literary-critical methods are primarily analytical in nature, the main approach to the teaching of literature in the west since the mid-twentieth century, literary formal analysis or close reading, is. This method, rooted in the academic movement labelled The New Criticism, approaches texts – chiefly short poems such as sonnets, which by virtue of their small size and significant complexity lend themselves well to this type of analysis – as units of discourse that can be understood in themselves, without reference to biographical or historical frameworks. This method of analysis breaks up the text linguistically in a study of prosody (the formal analysis of meter) and phonic effects such as alliteration and rhyme, and cognitively in examination of the interplay of syntactic structures, figurative language, and other elements of the poem that work to produce its larger effects. Mathematics Modern mathematical analysis is the study of infinite processes. It is the branch of mathematics that includes calculus. It can be applied in the study of classical concepts of mathematics, such as real numbers, complex variables, trigonometric functions, and algorithms, or of non-classical concepts like constructivism, harmonics, infinity, and vectors. Florian Cajori explains in A History of Mathematics (1893) the difference between modern and ancient mathematical analysis, as distinct from logical analysis, as follows: The terms synthesis and analysis are used in mathematics in a more special sense than in logic. In ancient mathematics they had a different meaning from what they now have. The oldest definition of mathematical analysis as opposed to synthesis is that given in [appended to] Euclid, XIII. 5, which in all probability was framed by Eudoxus: "Analysis is the obtaining of the thing sought by assuming it and so reasoning up to an admitted truth; synthesis is the obtaining of the thing sought by reasoning up to the inference and proof of it." The analytic method is not conclusive, unless all operations involved in it are known to be reversible. To remove all doubt, the Greeks, as a rule, added to the analytic process a synthetic one, consisting of a reversion of all operations occurring in the analysis. Thus the aim of analysis was to aid in the discovery of synthetic proofs or solutions. James Gow uses a similar argument as Cajori, with the following clarification, in his A Short History of Greek Mathematics (1884): The synthetic proof proceeds by shewing that the proposed new truth involves certain admitted truths. An analytic proof begins by an assumption, upon which a synthetic reasoning is founded. The Greeks distinguished theoretic from problematic analysis. A theoretic analysis is of the following kind. To prove that A is B, assume first that A is B. If so, then, since B is C and C is D and D is E, therefore A is E. If this be known a falsity, A is not B. But if this be a known truth and all the intermediate propositions be convertible, then the reverse process, A is E, E is D, D is C, C is B, therefore A is B, constitutes a synthetic proof of the original theorem. Problematic analysis is applied in all cases where it is proposed to construct a figure which is assumed to satisfy a given condition. The problem is then converted into some theorem which is involved in the condition and which is proved synthetically, and the steps of this synthetic proof taken backwards are a synthetic solution of the problem. Music Musical analysis – a process attempting to answer the question "How does this music work?" Musical Analysis is a study of how the composers use the notes together to compose music. Those studying music will find differences with each composer's musical analysis, which differs depending on the culture and history of music studied. An analysis of music is meant to simplify the music for you. Schenkerian analysis Schenkerian analysis is a collection of music analysis that focuses on the production of the graphic representation. This includes both analytical procedure as well as the notational style. Simply put, it analyzes tonal music which includes all chords and tones within a composition. Philosophy Philosophical analysis – a general term for the techniques used by philosophers Philosophical analysis refers to the clarification and composition of words put together and the entailed meaning behind them. Philosophical analysis dives deeper into the meaning of words and seeks to clarify that meaning by contrasting the various definitions. It is the study of reality, justification of claims, and the analysis of various concepts. Branches of philosophy include logic, justification, metaphysics, values and ethics. If questions can be answered empirically, meaning it can be answered by using the senses, then it is not considered philosophical. Non-philosophical questions also include events that happened in the past, or questions science or mathematics can answer. Analysis is the name of a prominent journal in philosophy. Psychotherapy Psychoanalysis – seeks to elucidate connections among unconscious components of patients' mental processes Transactional analysis Transactional analysis is used by therapists to try to gain a better understanding of the unconscious. It focuses on understanding and intervening human behavior. Policy Policy analysis – The use of statistical data to predict the effects of policy decisions made by governments and agencies Policy analysis includes a systematic process to find the most efficient and effective option to address the current situation. Qualitative analysis – The use of anecdotal evidence to predict the effects of policy decisions or, more generally, influence policy decisions Signal processing Finite element analysis – a computer simulation technique used in engineering analysis Independent component analysis Link quality analysis – the analysis of signal quality Path quality analysis Fourier analysis Statistics In statistics, the term analysis may refer to any method used for data analysis. Among the many such methods, some are: Analysis of variance (ANOVA) – a collection of statistical models and their associated procedures which compare means by splitting the overall observed variance into different parts Boolean analysis – a method to find deterministic dependencies between variables in a sample, mostly used in exploratory data analysis Cluster analysis – techniques for finding groups (called clusters), based on some measure of proximity or similarity Factor analysis – a method to construct models describing a data set of observed variables in terms of a smaller set of unobserved variables (called factors) Meta-analysis – combines the results of several studies that address a set of related research hypotheses Multivariate analysis – analysis of data involving several variables, such as by factor analysis, regression analysis, or principal component analysis Principal component analysis – transformation of a sample of correlated variables into uncorrelated variables (called principal components), mostly used in exploratory data analysis Regression analysis – techniques for analysing the relationships between several predictive variables and one or more outcomes in the data Scale analysis (statistics) – methods to analyse survey data by scoring responses on a numeric scale Sensitivity analysis – the study of how the variation in the output of a model depends on variations in the inputs Sequential analysis – evaluation of sampled data as it is collected, until the criterion of a stopping rule is met Spatial analysis – the study of entities using geometric or geographic properties Time-series analysis – methods that attempt to understand a sequence of data points spaced apart at uniform time intervals Other Aura analysis – a technique in which supporters of the method claim that the body's aura, or energy field is analysed Bowling analysis – Analysis of the performance of cricket players Lithic analysis – the analysis of stone tools using basic scientific techniques Lithic analysis is most often used by archeologists in determining which types of tools were used at a given time period pertaining to current artifacts discovered. Protocol analysis – a means for extracting persons' thoughts while they are performing a task See also Formal analysis Metabolism in biology Methodology Scientific method References External links Abstraction Critical thinking skills Emergence Empiricism Epistemological theories Intelligence Mathematical modeling Metaphysics of mind Methodology Ontology Philosophy of logic Rationalism Reasoning Research methods Scientific method Theory of mind	10
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the sidebands and possibly the carrier signal, which improves the ratio of message power to total transmission power, reduces power handling requirements of line repeaters, and permits better bandwidth utilization of the transmission medium. AM remains in use in many forms of communication in addition to AM broadcasting: shortwave radio, amateur radio, two-way radios, VHF aircraft radio, citizens band radio, and in computer modems in the form of QAM. Foundation In electronics, telecommunications and mechanics, modulation means varying some aspect of a continuous wave carrier signal with an information-bearing modulation waveform, such as an audio signal which represents sound, or a video signal which represents images. In this sense, the carrier wave, which has a much higher frequency than the message signal, carries the information. At the receiving station, the message signal is extracted from the modulated carrier by demodulation. In general form, a modulation process of a sinusoidal carrier wave may be described by the following equation: . A(t) represents the time-varying amplitude of the sinusoidal carrier wave and the cosine-term is the carrier at its angular frequency , and the instantaneous phase deviation . This description directly provides the two major groups of modulation, amplitude modulation and angle modulation. In angle modulation, the term A(t) is constant and the second term of the equation has a functional relationship to the modulating message signal. Angle modulation provides two methods of modulation, frequency modulation and phase modulation. In amplitude modulation, the angle term is held constant and the first term, A(t), of the equation has a functional relationship to the modulating message signal. The modulating message signal may be analog in nature, or it may be a digital signal, in which case the technique is generally called amplitude-shift keying. For example, in AM radio communication, a continuous wave radio-frequency signal has its amplitude modulated by an audio waveform before transmission. The message signal determines the envelope of the transmitted waveform. In the frequency domain, amplitude modulation produces a signal with power concentrated at the carrier frequency and two adjacent sidebands. Each sideband is equal in bandwidth to that of the modulating signal, and is a mirror image of the other. Standard AM is thus sometimes called "double-sideband amplitude modulation" (DSBAM). A disadvantage of all amplitude modulation techniques, not only standard AM, is that the receiver amplifies and detects noise and electromagnetic interference in equal proportion to the signal. Increasing the received signal-to-noise ratio, say, by a factor of 10 (a 10 decibel improvement), thus would require increasing the transmitter power by a factor of 10. This is in contrast to frequency modulation (FM) and digital radio where the effect of such noise following demodulation is strongly reduced so long as the received signal is well above the threshold for reception. For this reason AM broadcast is not favored for music and high fidelity broadcasting, but rather for voice communications and broadcasts (sports, news, talk radio etc.). AM is also inefficient in power usage; at least two-thirds of the power is concentrated in the carrier signal. The carrier signal contains none of the original information being transmitted (voice, video, data, etc.). However its presence provides a simple means of demodulation using envelope detection, providing a frequency and phase reference to extract the modulation from the sidebands. In some modulation systems based on AM, a lower transmitter power is required through partial or total elimination of the carrier component, however receivers for these signals are more complex because they must provide a precise carrier frequency reference signal (usually as shifted to the intermediate frequency) from a greatly reduced "pilot" carrier (in reduced-carrier transmission or DSB-RC) to use in the demodulation process. Even with the carrier totally eliminated in double-sideband suppressed-carrier transmission, carrier regeneration is possible using a Costas phase-locked loop. This does not work for single-sideband suppressed-carrier transmission (SSB-SC), leading to the characteristic "Donald Duck" sound from such receivers when slightly detuned. Single-sideband AM is nevertheless used widely in amateur radio and other voice communications because it has power and bandwidth efficiency (cutting the RF bandwidth in half compared to standard AM). On the other hand, in medium wave and short wave broadcasting, standard AM with the full carrier allows for reception using inexpensive receivers. The broadcaster absorbs the extra power cost to greatly increase potential audience. Shift keying A simple form of digital amplitude modulation which can be used for transmitting binary data is on–off keying, the simplest form of amplitude-shift keying, in which ones and zeros are represented by the presence or absence of a carrier. On–off keying is likewise used by radio amateurs to transmit Morse code where it is known as continuous wave (CW) operation, even though the transmission is not strictly "continuous." A more complex form of AM, quadrature amplitude modulation is now more commonly used with digital data, while making more efficient use of the available bandwidth. Analog telephony A simple form of amplitude modulation is the transmission of speech signals from a traditional analog telephone set using a common battery local loop. The direct current provided by the central office battery is a carrier with a frequency of 0 Hz. It is modulated by a microphone (transmitter) in the telephone set according to the acoustic signal from the speaker. The result is a varying amplitude direct current, whose AC-component is the speech signal extracted at the central office for transmission to another subscriber. Amplitude reference An additional function provided by the carrier in standard AM, but which is lost in either single or double-sideband suppressed-carrier transmission, is that it provides an amplitude reference. In the receiver, the automatic gain control (AGC) responds to the carrier so that the reproduced audio level stays in a fixed proportion to the original modulation. On the other hand, with suppressed-carrier transmissions there is no transmitted power during pauses in the modulation, so the AGC must respond to peaks of the transmitted power during peaks in the modulation. This typically involves a so-called fast attack, slow decay circuit which holds the AGC level for a second or more following such peaks, in between syllables or short pauses in the program. This is very acceptable for communications radios, where compression of the audio aids intelligibility. However it is absolutely undesired for music or normal broadcast programming, where a faithful reproduction of the original program, including its varying modulation levels, is expected. ITU type designations In 1982, the International Telecommunication Union (ITU) designated the types of amplitude modulation: History Amplitude modulation was used in experiments of multiplex telegraph and telephone transmission in the late 1800s. However, the practical development of this technology is identified with the period between 1900 and 1920 of radiotelephone transmission, that is, the effort to send audio signals by radio waves. The first radio transmitters, called spark gap transmitters, transmitted information by wireless telegraphy, using pulses of the carrier wave to spell out text messages in Morse code. They could not transmit audio because the carrier consisted of strings of damped waves, pulses of radio waves that declined to zero, and sounded like a buzz in receivers. In effect they were already amplitude modulated. Continuous waves The first AM transmission was made by Canadian researcher Reginald Fessenden on 23 December 1900 using a spark gap transmitter with a specially designed high frequency 10 kHz interrupter, over a distance of one mile (1.6 km) at Cobb Island, Maryland, US. His first transmitted words were, "Hello. One, two, three, four. Is it snowing where you are, Mr. Thiessen?". The words were barely intelligible above the background buzz of the spark. Fessenden was a significant figure in the development of AM radio. He was one of the first researchers to realize, from experiments like the above, that the existing technology for producing radio waves, the spark transmitter, was not usable for amplitude modulation, and that a new kind of transmitter, one that produced sinusoidal continuous waves, was needed. This was a radical idea at the time, because experts believed the impulsive spark was necessary to produce radio frequency waves, and Fessenden was ridiculed. He invented and helped develop one of the first continuous wave transmitters – the Alexanderson alternator, with which he made what is considered the first AM public entertainment broadcast on Christmas Eve, 1906. He also discovered the principle on which AM is based, heterodyning, and invented one of the first detectors able to rectify and receive AM, the electrolytic detector or "liquid baretter", in 1902. Other radio detectors invented for wireless telegraphy, such as the Fleming valve (1904) and the crystal detector (1906) also proved able to rectify AM signals, so the technological hurdle was generating AM waves; receiving them was not a problem. Early technologies Early experiments in AM radio transmission, conducted by Fessenden, Valdemar Poulsen, Ernst Ruhmer, Quirino Majorana, Charles Herrold, and Lee de Forest, were hampered by the lack of a technology for amplification. The first practical continuous wave AM transmitters were based on either the huge, expensive Alexanderson alternator, developed 1906–1910, or versions of the Poulsen arc transmitter (arc converter), invented in 1903. The modifications necessary to transmit AM were clumsy and resulted in very low quality audio. Modulation was usually accomplished by a carbon microphone inserted directly in the antenna or ground wire; its varying resistance varied the current to the antenna. The limited power handling ability of the microphone severely limited the power of the first radiotelephones; many of the microphones were water-cooled. Vacuum tubes The 1912 discovery of the amplifying ability of the Audion tube, invented in 1906 by Lee de Forest, solved these problems. The vacuum tube feedback oscillator, invented in 1912 by Edwin Armstrong and Alexander Meissner, was a cheap source of continuous waves and could be easily modulated to make an AM transmitter. Modulation did not have to be done at the output but could be applied to the signal before the final amplifier tube, so the microphone or other audio source didn't have to modulate a high-power radio signal. Wartime research greatly advanced the art of AM modulation, and after the war the availability of cheap tubes sparked a great increase in the number of radio stations experimenting with AM transmission of news or music. The vacuum tube was responsible for the rise of AM broadcasting around 1920, the first electronic mass communication medium. Amplitude modulation was virtually the only type used for radio broadcasting until FM broadcasting began after World War II. At the same time as AM radio began, telephone companies such as AT&T were developing the other large application for AM: sending multiple telephone calls through a single wire by modulating them on separate carrier frequencies, called frequency division multiplexing. Single-sideband In 1915, John Renshaw Carson formulated the first mathematical description of amplitude modulation, showing that a signal and carrier frequency combined in a nonlinear device creates a sideband on both sides of the carrier frequency. Passing the modulated signal through another nonlinear device can extract the original baseband signal. His analysis also showed that only one sideband was necessary to transmit the audio signal, and Carson patented single-sideband modulation (SSB) on 1 December 1915. This advanced variant of amplitude modulation was adopted by AT&T for longwave transatlantic telephone service beginning 7 January 1927. After WW-II, it was developed for military aircraft communication. Analysis The carrier wave (sine wave) of frequency fc and amplitude A is expressed by . The message signal, such as an audio signal that is used for modulating the carrier, is m(t), and has a frequency fm, much lower than fc: , where m is the amplitude sensitivity, M is the amplitude of modulation. If m < 1, (1 + m(t)/A) is always positive for undermodulation. If m > 1 then overmodulation occurs and reconstruction of message signal from the transmitted signal would lead in loss of original signal. Amplitude modulation results when the carrier c(t) is multiplied by the positive quantity (1 + m(t)/A): In this simple case m is identical to the modulation index, discussed below. With m = 0.5 the amplitude modulated signal y(t) thus corresponds to the top graph (labelled "50% Modulation") in figure 4. Using prosthaphaeresis identities, y(t) can be shown to be the sum of three sine waves: Therefore, the modulated signal has three components: the carrier wave c(t) which is unchanged in frequency, and two sidebands with frequencies slightly above and below the carrier frequency fc. Spectrum A useful modulation signal m(t) is usually more complex than a single sine wave, as treated above. However, by the principle of Fourier decomposition, m(t) can be expressed as the sum of a set of sine waves of various frequencies, amplitudes, and phases. Carrying out the multiplication of 1 + m(t) with c(t) as above, the result consists of a sum of sine waves. Again, the carrier c(t) is present unchanged, but each frequency component of m at fi has two sidebands at frequencies fc + fi and fc – fi. The collection of the former frequencies above the carrier frequency is known as the upper sideband, and those below constitute the lower sideband. The modulation m(t) may be considered to consist of an equal mix of positive and negative frequency components, as shown in the top of figure 2. One can view the sidebands as that modulation m(t) having simply been shifted in frequency by fc as depicted at the bottom right of figure 2. The short-term spectrum of modulation, changing as it would for a human voice for instance, the frequency content (horizontal axis) may be plotted as a function of time (vertical axis), as in figure 3. It can again be seen that as the modulation frequency content varies, an upper sideband is generated according to those frequencies shifted above the carrier frequency, and the same content mirror-imaged in the lower sideband below the carrier frequency. At all times, the carrier itself remains constant, and of greater power than the total sideband power. Power and spectrum efficiency The RF bandwidth of an AM transmission (refer to figure 2, but only considering positive frequencies) is twice the bandwidth of the modulating (or "baseband") signal, since the upper and lower sidebands around the carrier frequency each have a bandwidth as wide as the highest modulating frequency. Although the bandwidth of an AM signal is narrower than one using frequency modulation (FM), it is twice as wide as single-sideband techniques; it thus may be viewed as spectrally inefficient. Within a frequency band, only half as many transmissions (or "channels") can thus be accommodated. For this reason analog television employs a variant of single-sideband (known as vestigial sideband, somewhat of a compromise in terms of bandwidth) in order to reduce the required channel spacing. Another improvement over standard AM is obtained through reduction or suppression of the carrier component of the modulated spectrum. In figure 2 this is the spike in between the sidebands; even with full (100%) sine wave modulation, the power in the carrier component is twice that in the sidebands, yet it carries no unique information. Thus there is a great advantage in efficiency in reducing or totally suppressing the carrier, either in conjunction with elimination of one sideband (single-sideband suppressed-carrier transmission) or with both sidebands remaining (double sideband suppressed carrier). While these suppressed carrier transmissions are efficient in terms of transmitter power, they require more sophisticated receivers employing synchronous detection and regeneration of the carrier frequency. For that reason, standard AM continues to be widely used, especially in broadcast transmission, to allow for the use of inexpensive receivers using envelope detection. Even (analog) television, with a (largely) suppressed lower sideband, includes sufficient carrier power for use of envelope detection. But for communications systems where both transmitters and receivers can be optimized, suppression of both one sideband and the carrier represent a net advantage and are frequently employed. A technique used widely in broadcast AM transmitters is an application of the Hapburg carrier, first proposed in the 1930s but impractical with the technology then available. During periods of low modulation the carrier power would be reduced and would return to full power during periods of high modulation levels. This has the effect of reducing the overall power demand of the transmitter and is most effective on speech type programmes. Various trade names are used for its implementation by the transmitter manufacturers from the late 80's onwards. Modulation index The AM modulation index is a measure based on the ratio of the modulation excursions of the RF signal to the level of the unmodulated carrier. It is thus defined as: where and are the modulation amplitude and carrier amplitude, respectively; the modulation amplitude is the peak (positive or negative) change in the RF amplitude from its unmodulated value. Modulation index is normally expressed as a percentage, and may be displayed on a meter connected to an AM transmitter. So if , carrier amplitude varies by 50% above (and below) its unmodulated level, as is shown in the first waveform, below. For , it varies by 100% as shown in the illustration below it. With 100% modulation the wave amplitude sometimes reaches zero, and this represents full modulation using standard AM and is often a target (in order to obtain the highest possible signal-to-noise ratio) but mustn't be exceeded. Increasing the modulating signal beyond that point, known as overmodulation, causes a standard AM modulator (see below) to fail, as the negative excursions of the wave envelope cannot become less than zero, resulting in distortion ("clipping") of the received modulation. Transmitters typically incorporate a limiter circuit to avoid overmodulation, and/or a compressor circuit (especially for voice communications) in order to still approach 100% modulation for maximum intelligibility above the noise. Such circuits are sometimes referred to as a vogad. However it is possible to talk about a modulation index exceeding 100%, without introducing distortion, in the case of double-sideband reduced-carrier transmission. In that case, negative excursions beyond zero entail a reversal of the carrier phase, as shown in the third waveform below. This cannot be produced using the efficient high-level (output stage) modulation techniques (see below) which are widely used especially in high power broadcast transmitters. Rather, a special modulator produces such a waveform at a low level followed by a linear amplifier. What's more, a standard AM receiver using an envelope detector is incapable of properly demodulating such a signal. Rather, synchronous detection is required. Thus double-sideband transmission is generally not referred to as "AM" even though it generates an identical RF waveform as standard AM as long as the modulation index is below 100%. Such systems more often attempt a radical reduction of the carrier level compared to the sidebands (where the useful information is present) to the point of double-sideband suppressed-carrier transmission where the carrier is (ideally) reduced to zero. In all such cases the term "modulation index" loses its value as it refers to the ratio of the modulation amplitude to a rather small (or zero) remaining carrier amplitude. Modulation methods Modulation circuit designs may be classified as low- or high-level (depending on whether they modulate in a low-power domain—followed by amplification for transmission—or in the high-power domain of the transmitted signal). Low-level generation In modern radio systems, modulated signals are generated via digital signal processing (DSP). With DSP many types of AM are possible with software control (including DSB with carrier, SSB suppressed-carrier and independent sideband, or ISB). Calculated digital samples are converted to voltages with a digital-to-analog converter, typically at a frequency less than the desired RF-output frequency. The analog signal must then be shifted in frequency and linearly amplified to the desired frequency and power level (linear amplification must be used to prevent modulation distortion). This low-level method for AM is used in many Amateur Radio transceivers. AM may also be generated at a low level, using analog methods described in the next section. High-level generation High-power AM transmitters (such as those used for AM broadcasting) are based on high-efficiency class-D and class-E power amplifier stages, modulated by varying the supply voltage. Older designs (for broadcast and amateur radio) also generate AM by controlling the gain of the transmitter's final amplifier (generally class-C, for efficiency). The following types are for vacuum tube transmitters (but similar options are available with transistors): Plate modulation In plate modulation, the plate voltage of the RF amplifier is modulated with the audio signal. The audio power requirement is 50 percent of the RF-carrier power. Heising (constant-current) modulation RF amplifier plate voltage is fed through a choke (high-value inductor). The AM modulation tube plate is fed through the same inductor, so the modulator tube diverts current from the RF amplifier. The choke acts as a constant current source in the audio range. This system has a low power efficiency. Control grid modulation The operating bias and gain of the final RF amplifier can be controlled by varying the voltage of the control grid. This method requires little audio power, but care must be taken to reduce distortion. Clamp tube (screen grid) modulation The screen-grid bias may be controlled through a clamp tube, which reduces voltage according to the modulation signal. It is difficult to approach 100-percent modulation while maintaining low distortion with this system. Doherty modulation One tube provides the power under carrier conditions and another operates only for positive modulation peaks. Overall efficiency is good, and distortion is low. Outphasing modulation Two tubes are operated in parallel, but partially out of phase with each other. As they are differentially phase modulated their combined amplitude is greater or smaller. Efficiency is good and distortion low when properly adjusted. Pulse-width modulation (PWM) or pulse-duration modulation (PDM) A highly efficient high voltage power supply is applied to the tube plate. The output voltage of this supply is varied at an audio rate to follow the program. This system was pioneered by Hilmer Swanson and has a number of variations, all of which achieve high efficiency and sound quality. Digital methods The Harris Corporation obtained a patent for synthesizing a modulated high-power carrier wave from a set of digitally selected low-power amplifiers, running in phase at the same carrier frequency. The input signal is sampled by a conventional audio analog-to-digital converter (ADC), and fed to a digital exciter, which modulates overall transmitter output power by switching a series of low-power solid-state RF amplifiers on and off. The combined output drives the antenna system. Demodulation methods The simplest form of AM demodulator consists of a diode which is configured to act as envelope detector. Another type of demodulator, the product detector, can provide better-quality demodulation with additional circuit complexity. See also AM stereo Shortwave radio Amplitude modulation signalling system (AMSS) Modulation sphere Types of radio emissions Airband DSB-SC References Bibliography Newkirk, David and Karlquist, Rick (2004). Mixers, modulators and demodulators. In D. G. Reed (ed.), The ARRL Handbook for Radio Communications (81st ed.), pp. 15.1–15.36. Newington: ARRL. . External links Amplitude Modulation by Jakub Serych, Wolfram Demonstrations Project. Amplitude Modulation, by S Sastry. Amplitude Modulation, an introduction by Federation of American Scientists. Amplitude Modulation tutorial including related topics of modulators, demodulators, etc... Analog Modulation online interactive demonstration using Python in Google Colab Platform, by C Foh. Radio modulation modes	13
Augustin-Jean Fresnel (10 May 1788 – 14 July 1827) was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton's corpuscular theory, from the late 1830s until the end of the 19th century. He is perhaps better known for inventing the catadioptric (reflective/refractive) Fresnel lens and for pioneering the use of "stepped" lenses to extend the visibility of lighthouses, saving countless lives at sea. The simpler dioptric (purely refractive) stepped lens, first proposed by Count Buffon and independently reinvented by Fresnel, is used in screen magnifiers and in condenser lenses for overhead projectors. By expressing Huygens's principle of secondary waves and Young's principle of interference in quantitative terms, and supposing that simple colors consist of sinusoidal waves, Fresnel gave the first satisfactory explanation of diffraction by straight edges, including the first satisfactory wave-based explanation of rectilinear propagation. Part of his argument was a proof that the addition of sinusoidal functions of the same frequency but different phases is analogous to the addition of forces with different directions. By further supposing that light waves are purely transverse, Fresnel explained the nature of polarization, the mechanism of chromatic polarization, and the transmission and reflection coefficients at the interface between two transparent isotropic media. Then, by generalizing the direction-speed-polarization relation for calcite, he accounted for the directions and polarizations of the refracted rays in doubly-refractive crystals of the biaxial class (those for which Huygens's secondary wavefronts are not axisymmetric). The period between the first publication of his pure-transverse-wave hypothesis, and the submission of his first correct solution to the biaxial problem, was less than a year. Later, he coined the terms linear polarization, circular polarization, and elliptical polarization, explained how optical rotation could be understood as a difference in propagation speeds for the two directions of circular polarization, and (by allowing the reflection coefficient to be complex) accounted for the change in polarization due to total internal reflection, as exploited in the Fresnel rhomb. Defenders of the established corpuscular theory could not match his quantitative explanations of so many phenomena on so few assumptions. Fresnel had a lifelong battle with tuberculosis, to which he succumbed at the age of 39. Although he did not become a public celebrity in his lifetime, he lived just long enough to receive due recognition from his peers, including (on his deathbed) the Rumford Medal of the Royal Society of London, and his name is ubiquitous in the modern terminology of optics and waves. After the wave theory of light was subsumed by Maxwell's electromagnetic theory in the 1860s, some attention was diverted from the magnitude of Fresnel's contribution. In the period between Fresnel's unification of physical optics and Maxwell's wider unification, a contemporary authority, Humphrey Lloyd, described Fresnel's transverse-wave theory as "the noblest fabric which has ever adorned the domain of physical science, Newton's system of the universe alone excepted." Early life Family Augustin-Jean Fresnel (also called Augustin Jean or simply Augustin), born in Broglie, Normandy, on 10 May 1788, was the second of four sons of the architect Jacques Fresnel (1755–1805) and his wife Augustine, née Mérimée (1755–1833). In 1790, following the Revolution, Broglie became part of the département of Eure. The family moved twice—in 1789/90 to Cherbourg, and in 1794 to Jacques's home town of Mathieu, where Madame Fresnel would spend 25 years as a widow, outliving two of her sons. The first son, Louis (1786–1809), was admitted to the École Polytechnique, became a lieutenant in the artillery, and was killed in action at Jaca, Spain, the day before his 23rd birthday. The third, Léonor (1790–1869), followed Augustin into civil engineering, succeeded him as secretary of the Lighthouse Commission, and helped to edit his collected works. The fourth, Fulgence Fresnel (1795–1855), became a noted linguist, diplomat, and orientalist, and occasionally assisted Augustin with negotiations. Fulgence died in Bagdad in 1855 having led a mission to explore Babylon. Léonor apparently was the only one of the four who married. Their mother's younger brother, Jean François "Léonor" Mérimée (1757–1836), father of the writer Prosper Mérimée (1803–1870), was a paint artist who turned his attention to the chemistry of painting. He became the Permanent Secretary of the École des Beaux-Arts and (until 1814) a professor at the École Polytechnique, and was the initial point of contact between Augustin and the leading optical physicists of the day . Education The Fresnel brothers were initially home-schooled by their mother. The sickly Augustin was considered the slow one, not inclined to memorization; but the popular story that he hardly began to read until the age of eight is disputed. At the age of nine or ten he was undistinguished except for his ability to turn tree-branches into toy bows and guns that worked far too well, earning himself the title l'homme de génie (the man of genius) from his accomplices, and a united crackdown from their elders. In 1801, Augustin was sent to the École Centrale at Caen, as company for Louis. But Augustin lifted his performance: in late 1804 he was accepted into the École Polytechnique, being placed 17th in the entrance examination. As the detailed records of the École Polytechnique begin in 1808, we know little of Augustin's time there, except that he made few if any friends and—in spite of continuing poor health—excelled in drawing and geometry: in his first year he took a prize for his solution to a geometry problem posed by Adrien-Marie Legendre. Graduating in 1806, he then enrolled at the École Nationale des Ponts et Chaussées (National School of Bridges and Roads, also known as "ENPC" or "École des Ponts"), from which he graduated in 1809, entering the service of the Corps des Ponts et Chaussées as an ingénieur ordinaire aspirant (ordinary engineer in training). Directly or indirectly, he was to remain in the employment of the "Corps des Ponts" for the rest of his life. Religious formation Fresnel's parents were Roman Catholics of the Jansenist sect, characterized by an extreme Augustinian view of original sin. Religion took first place in the boys' home-schooling. In 1802, his mother said: Augustin remained a Jansenist. He regarded his intellectual talents as gifts from God, and considered it his duty to use them for the benefit of others. According to his fellow engineer Alphonse Duleau, who helped to nurse him through his final illness, Fresnel saw the study of nature as part of the study of the power and goodness of God. He placed virtue above science and genius. In his last days he prayed for "strength of soul," not against death alone, but against "the interruption of discoveries… of which he hoped to derive useful applications." Jansenism is considered heretical by the Roman Catholic Church, and Grattan-Guinness suggests this is why Fresnel never gained a permanent academic teaching post; his only teaching appointment was at the Athénée in the winter of 1819–20. The article on Fresnel in the Catholic Encyclopedia does not mention his Jansenism, but describes him as "a deeply religious man and remarkable for his keen sense of duty." Engineering assignments Fresnel was initially posted to the western département of Vendée. There, in 1811, he anticipated what became known as the Solvay process for producing soda ash, except that recycling of the ammonia was not considered. That difference may explain why leading chemists, who learned of his discovery through his uncle Léonor, eventually thought it uneconomic. About 1812, Fresnel was sent to Nyons, in the southern département of Drôme, to assist with the imperial highway that was to connect Spain and Italy. It is from Nyons that we have the first evidence of his interest in optics. On 15 May 1814, while work was slack due to Napoleon's defeat, Fresnel wrote a "P.S." to his brother Léonor, saying in part: As late as 28 December he was still waiting for information, but he had received Biot's memoir by 10 February 1815. (The Institut de France had taken over the functions of the French Académie des Sciences and other académies in 1795. In 1816 the Académie des Sciences regained its name and autonomy, but remained part of the institute.) In March 1815, perceiving Napoleon's return from Elba as "an attack on civilization", Fresnel departed without leave, hastened to Toulouse and offered his services to the royalist resistance, but soon found himself on the sick list. Returning to Nyons in defeat, he was threatened and had his windows broken. During the Hundred Days he was placed on suspension, which he was eventually allowed to spend at his mother's house in Mathieu. There he used his enforced leisure to begin his optical experiments. Contributions to physical optics Historical context: From Newton to Biot The appreciation of Fresnel's reconstruction of physical optics might be assisted by an overview of the fragmented state in which he found the subject. In this subsection, optical phenomena that were unexplained or whose explanations were disputed are named in bold type. The corpuscular theory of light, favored by Isaac Newton and accepted by nearly all of Fresnel's seniors, easily explained rectilinear propagation: the corpuscles obviously moved very fast, so that their paths were very nearly straight. The wave theory, as developed by Christiaan Huygens in his Treatise on Light (1690), explained rectilinear propagation on the assumption that each point crossed by a traveling wavefront becomes the source of a secondary wavefront. Given the initial position of a traveling wavefront, any later position (according to Huygens) was the common tangent surface (envelope) of the secondary wavefronts emitted from the earlier position. As the extent of the common tangent was limited by the extent of the initial wavefront, the repeated application of Huygens's construction to a plane wavefront of limited extent (in a uniform medium) gave a straight, parallel beam. While this construction indeed predicted rectilinear propagation, it was difficult to reconcile with the common observation that wavefronts on the surface of water can bend around obstructions, and with the similar behavior of sound waves—causing Newton to maintain, to the end of his life, that if light consisted of waves it would "bend and spread every way" into the shadows. Huygens's theory neatly explained the law of ordinary reflection and the law of ordinary refraction ("Snell's law"), provided that the secondary waves traveled slower in denser media (those of higher refractive index). The corpuscular theory, with the hypothesis that the corpuscles were subject to forces acting perpendicular to surfaces, explained the same laws equally well, albeit with the implication that light traveled faster in denser media; that implication was wrong, but could not be directly disproven with the technology of Newton's time or even Fresnel's time . Similarly inconclusive was stellar aberration—that is, the apparent change in the position of a star due to the velocity of the earth across the line of sight (not to be confused with stellar parallax, which is due to the displacement of the earth across the line of sight). Identified by James Bradley in 1728, stellar aberration was widely taken as confirmation of the corpuscular theory. But it was equally compatible with the wave theory, as Euler noted in 1746—tacitly assuming that the aether (the supposed wave-bearing medium) near the earth was not disturbed by the motion of the earth. The outstanding strength of Huygens's theory was his explanation of the birefringence (double refraction) of "Iceland crystal" (transparent calcite), on the assumption that the secondary waves are spherical for the ordinary refraction (which satisfies Snell's law) and spheroidal for the extraordinary refraction (which does not). In general, Huygens's common-tangent construction implies that rays are paths of least time between successive positions of the wavefront, in accordance with Fermat's principle. In the special case of isotropic media, the secondary wavefronts must be spherical, and Huygens's construction then implies that the rays are perpendicular to the wavefront; indeed, the law of ordinary refraction can be separately derived from that premise, as Ignace-Gaston Pardies did before Huygens. Although Newton rejected the wave theory, he noticed its potential to explain colors, including the colors of "thin plates" (e.g., "Newton's rings", and the colors of skylight reflected in soap bubbles), on the assumption that light consists of periodic waves, with the lowest frequencies (longest wavelengths) at the red end of the spectrum, and the highest frequencies (shortest wavelengths) at the violet end. In 1672 he published a heavy hint to that effect, but contemporary supporters of the wave theory failed to act on it: Robert Hooke treated light as a periodic sequence of pulses but did not use frequency as the criterion of color, while Huygens treated the waves as individual pulses without any periodicity; and Pardies died young in 1673. Newton himself tried to explain colors of thin plates using the corpuscular theory, by supposing that his corpuscles had the wavelike property of alternating between "fits of easy transmission" and "fits of easy reflection", the distance between like "fits" depending on the color and the medium and, awkwardly, on the angle of refraction or reflection into that medium. More awkwardly still, this theory required thin plates to reflect only at the back surface, although thick plates manifestly reflected also at the front surface. It was not until 1801 that Thomas Young, in the Bakerian Lecture for that year, cited Newton's hint, and accounted for the colors of a thin plate as the combined effect of the front and back reflections, which reinforce or cancel each other according to the wavelength and the thickness. Young similarly explained the colors of "striated surfaces" (e.g., gratings) as the wavelength-dependent reinforcement or cancellation of reflections from adjacent lines. He described this reinforcement or cancellation as interference. Neither Newton nor Huygens satisfactorily explained diffraction—the blurring and fringing of shadows where, according to rectilinear propagation, they ought to be sharp. Newton, who called diffraction "inflexion", supposed that rays of light passing close to obstacles were bent ("inflected"); but his explanation was only qualitative. Huygens's common-tangent construction, without modifications, could not accommodate diffraction at all. Two such modifications were proposed by Young in the same 1801 Bakerian Lecture: first, that the secondary waves near the edge of an obstacle could diverge into the shadow, but only weakly, due to limited reinforcement from other secondary waves; and second, that diffraction by an edge was caused by interference between two rays: one reflected off the edge, and the other inflected while passing near the edge. The latter ray would be undeviated if sufficiently far from the edge, but Young did not elaborate on that case. These were the earliest suggestions that the degree of diffraction depends on wavelength. Later, in the 1803 Bakerian Lecture, Young ceased to regard inflection as a separate phenomenon, and produced evidence that diffraction fringes inside the shadow of a narrow obstacle were due to interference: when the light from one side was blocked, the internal fringes disappeared. But Young was alone in such efforts until Fresnel entered the field. Huygens, in his investigation of double refraction, noticed something that he could not explain: when light passes through two similarly oriented calcite crystals at normal incidence, the ordinary ray emerging from the first crystal suffers only the ordinary refraction in the second, while the extraordinary ray emerging from the first suffers only the extraordinary refraction in the second; but when the second crystal is rotated 90° about the incident rays, the roles are interchanged, so that the ordinary ray emerging from the first crystal suffers only the extraordinary refraction in the second, and vice versa. This discovery gave Newton another reason to reject the wave theory: rays of light evidently had "sides". Corpuscles could have sides (or poles, as they would later be called); but waves of light could not, because (so it seemed) any such waves would need to be longitudinal (with vibrations in the direction of propagation). Newton offered an alternative "Rule" for the extraordinary refraction, which rode on his authority through the 18th century, although he made "no known attempt to deduce it from any principles of optics, corpuscular or otherwise." In 1808, the extraordinary refraction of calcite was investigated experimentally, with unprecedented accuracy, by Étienne-Louis Malus, and found to be consistent with Huygens's spheroid construction, not Newton's "Rule". Malus, encouraged by Pierre-Simon Laplace, then sought to explain this law in corpuscular terms: from the known relation between the incident and refracted ray directions, Malus derived the corpuscular velocity (as a function of direction) that would satisfy Maupertuis's "least action" principle. But, as Young pointed out, the existence of such a velocity law was guaranteed by Huygens's spheroid, because Huygens's construction leads to Fermat's principle, which becomes Maupertuis's principle if the ray speed is replaced by the reciprocal of the particle speed! The corpuscularists had not found a force law that would yield the alleged velocity law, except by a circular argument in which a force acting at the surface of the crystal inexplicably depended on the direction of the (possibly subsequent) velocity within the crystal. Worse, it was doubtful that any such force would satisfy the conditions of Maupertuis's principle. In contrast, Young proceeded to show that "a medium more easily compressible in one direction than in any direction perpendicular to it, as if it consisted of an infinite number of parallel plates connected by a substance somewhat less elastic" admits spheroidal longitudinal wavefronts, as Huygens supposed. But Malus, in the midst of his experiments on double refraction, noticed something else: when a ray of light is reflected off a non-metallic surface at the appropriate angle, it behaves like one of the two rays emerging from a calcite crystal. It was Malus who coined the term polarization to describe this behavior, although the polarizing angle became known as Brewster's angle after its dependence on the refractive index was determined experimentally by David Brewster in 1815. Malus also introduced the term plane of polarization. In the case of polarization by reflection, his "plane of polarization" was the plane of the incident and reflected rays; in modern terms, this is the plane normal to the electric vibration. In 1809, Malus further discovered that the intensity of light passing through two polarizers is proportional to the squared cosine of the angle between their planes of polarization (Malus's law), whether the polarizers work by reflection or double refraction, and that all birefringent crystals produce both extraordinary refraction and polarization. As the corpuscularists started trying to explain these things in terms of polar "molecules" of light, the wave-theorists had no working hypothesis on the nature of polarization, prompting Young to remark that Malus's observations "present greater difficulties to the advocates of the undulatory theory than any other facts with which we are acquainted." Malus died in February 1812, at the age of 36, shortly after receiving the Rumford Medal for his work on polarization. In August 1811, François Arago reported that if a thin plate of mica was viewed against a white polarized backlight through a calcite crystal, the two images of the mica were of complementary colors (the overlap having the same color as the background). The light emerging from the mica was "depolarized" in the sense that there was no orientation of the calcite that made one image disappear; yet it was not ordinary ("unpolarized") light, for which the two images would be of the same color. Rotating the calcite around the line of sight changed the colors, though they remained complementary. Rotating the mica changed the saturation (not the hue) of the colors. This phenomenon became known as chromatic polarization. Replacing the mica with a much thicker plate of quartz, with its faces perpendicular to the optic axis (the axis of Huygens's spheroid or Malus's velocity function), produced a similar effect, except that rotating the quartz made no difference. Arago tried to explain his observations in corpuscular terms. In 1812, as Arago pursued further qualitative experiments and other commitments, Jean-Baptiste Biot reworked the same ground using a gypsum lamina in place of the mica, and found empirical formulae for the intensities of the ordinary and extraordinary images. The formulae contained two coefficients, supposedly representing colors of rays "affected" and "unaffected" by the plate—the "affected" rays being of the same color mix as those reflected by amorphous thin plates of proportional, but lesser, thickness. Arago protested, declaring that he had made some of the same discoveries but had not had time to write them up. In fact the overlap between Arago's work and Biot's was minimal, Arago's being only qualitative and wider in scope (attempting to include polarization by reflection). But the dispute triggered a notorious falling-out between the two men. Later that year, Biot tried to explain the observations as an oscillation of the alignment of the "affected" corpuscles at a frequency proportional to that of Newton's "fits", due to forces depending on the alignment. This theory became known as mobile polarization. To reconcile his results with a sinusoidal oscillation, Biot had to suppose that the corpuscles emerged with one of two permitted orientations, namely the extremes of the oscillation, with probabilities depending on the phase of the oscillation. Corpuscular optics was becoming expensive on assumptions. But in 1813, Biot reported that the case of quartz was simpler: the observable phenomenon (now called optical rotation or optical activity or sometimes rotary polarization) was a gradual rotation of the polarization direction with distance, and could be explained by a corresponding rotation (not oscillation) of the corpuscles. Early in 1814, reviewing Biot's work on chromatic polarization, Young noted that the periodicity of the color as a function of the plate thickness—including the factor by which the period exceeded that for a reflective thin plate, and even the effect of obliquity of the plate (but not the role of polarization)—could be explained by the wave theory in terms of the different propagation times of the ordinary and extraordinary waves through the plate. But Young was then the only public defender of the wave theory. In summary, in the spring of 1814, as Fresnel tried in vain to guess what polarization was, the corpuscularists thought that they knew, while the wave-theorists (if we may use the plural) literally had no idea. Both theories claimed to explain rectilinear propagation, but the wave explanation was overwhelmingly regarded as unconvincing. The corpuscular theory could not rigorously link double refraction to surface forces; the wave theory could not yet link it to polarization. The corpuscular theory was weak on thin plates and silent on gratings; the wave theory was strong on both, but under-appreciated. Concerning diffraction, the corpuscular theory did not yield quantitative predictions, while the wave theory had begun to do so by considering diffraction as a manifestation of interference, but had only considered two rays at a time. Only the corpuscular theory gave even a vague insight into Brewster's angle, Malus's law, or optical rotation. Concerning chromatic polarization, the wave theory explained the periodicity far better than the corpuscular theory, but had nothing to say about the role of polarization; and its explanation of the periodicity was largely ignored. And Arago had founded the study of chromatic polarization, only to lose the lead, controversially, to Biot. Such were the circumstances in which Arago first heard of Fresnel's interest in optics. Rêveries Fresnel's letters from later in 1814 reveal his interest in the wave theory, including his awareness that it explained the constancy of the speed of light and was at least compatible with stellar aberration. Eventually he compiled what he called his rêveries (musings) into an essay and submitted it via Léonor Mérimée to André-Marie Ampère, who did not respond directly. But on 19 December, Mérimée dined with Ampère and Arago, with whom he was acquainted through the École Polytechnique; and Arago promised to look at Fresnel's essay. In mid 1815, on his way home to Mathieu to serve his suspension, Fresnel met Arago in Paris and spoke of the wave theory and stellar aberration. He was informed that he was trying to break down open doors ("il enfonçait des portes ouvertes"), and directed to classical works on optics. Diffraction First attempt (1815) On 12 July 1815, as Fresnel was about to leave Paris, Arago left him a note on a new topic: Fresnel would not have ready access to these works outside Paris, and could not read English. But, in Mathieu—with a point-source of light made by focusing sunlight with a drop of honey, a crude micrometer of his own construction, and supporting apparatus made by a local locksmith—he began his own experiments. His technique was novel: whereas earlier investigators had projected the fringes onto a screen, Fresnel soon abandoned the screen and observed the fringes in space, through a lens with the micrometer at its focus, allowing more accurate measurements while requiring less light. Later in July, after Napoleon's final defeat, Fresnel was reinstated with the advantage of having backed the winning side. He requested a two-month leave of absence, which was readily granted because roadworks were in abeyance. On 23 September he wrote to Arago, beginning "I think I have found the explanation and the law of colored fringes which one notices in the shadows of bodies illuminated by a luminous point." In the same paragraph, however, Fresnel implicitly acknowledged doubt about the novelty of his work: noting that he would need to incur some expense in order to improve his measurements, he wanted to know "whether this is not useless, and whether the law of diffraction has not already been established by sufficiently exact experiments." He explained that he had not yet had a chance to acquire the items on his reading lists, with the apparent exception of "Young's book", which he could not understand without his brother's help. Not surprisingly, he had retraced many of Young's steps. In a memoir sent to the institute on 15 October 1815, Fresnel mapped the external and internal fringes in the shadow of a wire. He noticed, like Young before him, that the internal fringes disappeared when the light from one side was blocked, and concluded that "the vibrations of two rays that cross each other under a very small angle can contradict each other…" But, whereas Young took the disappearance of the internal fringes as confirmation of the principle of interference, Fresnel reported that it was the internal fringes that first drew his attention to the principle. To explain the diffraction pattern, Fresnel constructed the internal fringes by considering the intersections of circular wavefronts emitted from the two edges of the obstruction, and the external fringes by considering the intersections between direct waves and waves reflected off the nearer edge. For the external fringes, to obtain tolerable agreement with observation, he had to suppose that the reflected wave was inverted; and he noted that the predicted paths of the fringes were hyperbolic. In the part of the memoir that most clearly surpassed Young, Fresnel explained the ordinary laws of reflection and refraction in terms of interference, noting that if two parallel rays were reflected or refracted at other than the prescribed angle, they would no longer have the same phase in a common perpendicular plane, and every vibration would be cancelled by a nearby vibration. He noted that his explanation was valid provided that the surface irregularities were much smaller than the wavelength. On 10 November, Fresnel sent a supplementary note dealing with Newton's rings and with gratings, including, for the first time, transmission gratings—although in that case the interfering rays were still assumed to be "inflected", and the experimental verification was inadequate because it used only two threads. As Fresnel was not a member of the institute, the fate of his memoir depended heavily on the report of a single member. The reporter for Fresnel's memoir turned out to be Arago (with Poinsot as the other reviewer). On 8 November, Arago wrote to Fresnel: Fresnel was troubled, wanting to know more precisely where he had collided with Young. Concerning the curved paths of the "colored bands", Young had noted the hyperbolic paths of the fringes in the two-source interference pattern, corresponding roughly to Fresnel's internal fringes, and had described the hyperbolic fringes that appear on the screen within rectangular shadows. He had not mentioned the curved paths of the external fringes of a shadow; but, as he later explained, that was because Newton had already done so. Newton evidently thought the fringes were caustics. Thus Arago erred in his belief that the curved paths of the fringes were fundamentally incompatible with the corpuscular theory. Arago's letter went on to request more data on the external fringes. Fresnel complied, until he exhausted his leave and was assigned to Rennes in the département of Ille-et-Vilaine. At this point Arago interceded with Gaspard de Prony, head of the École des Ponts, who wrote to Louis-Mathieu Molé, head of the Corps des Ponts, suggesting that the progress of science and the prestige of the Corps would be enhanced if Fresnel could come to Paris for a time. He arrived in March 1816, and his leave was subsequently extended through the middle of the year. Meanwhile, in an experiment reported on 26 February 1816, Arago verified Fresnel's prediction that the internal fringes were shifted if the rays on one side of the obstacle passed through a thin glass lamina. Fresnel correctly attributed this phenomenon to the lower wave velocity in the glass. Arago later used a similar argument to explain the colors in the scintillation of stars. Fresnel's updated memoir was eventually published in the March 1816 issue of Annales de Chimie et de Physique, of which Arago had recently become co-editor. That issue did not actually appear until May. In March, Fresnel already had competition: Biot read a memoir on diffraction by himself and his student Claude Pouillet, containing copious data and arguing that the regularity of diffraction fringes, like the regularity of Newton's rings, must be linked to Newton's "fits". But the new link was not rigorous, and Pouillet himself would become a distinguished early adopter of the wave theory. "Efficacious ray", double-mirror experiment (1816) On 24 May 1816, Fresnel wrote to Young (in French), acknowledging how little of his own memoir was new. But in a "supplement" signed on 14 July and read the next day, Fresnel noted that the internal fringes were more accurately predicted by supposing that the two interfering rays came from some distance outside the edges of the obstacle. To explain this, he divided the incident wavefront at the obstacle into what we now call Fresnel zones, such that the secondary waves from each zone were spread over half a cycle when they arrived at the observation point. The zones on one side of the obstacle largely canceled out in pairs, except the first zone, which was represented by an "efficacious ray". This approach worked for the internal fringes, but the superposition of the efficacious ray and the direct ray did not work for the external fringes. The contribution from the "efficacious ray" was thought to be only partly canceled, for reasons involving the dynamics of the medium: where the wavefront was continuous, symmetry forbade oblique vibrations; but near the obstacle that truncated the wavefront, the asymmetry allowed some sideways vibration towards the geometric shadow. This argument showed that Fresnel had not (yet) fully accepted Huygens's principle, which would have permitted oblique radiation from all portions of the front. In the same supplement, Fresnel described his well-known double mirror, comprising two flat mirrors joined at an angle of slightly less than 180°, with which he produced a two-slit interference pattern from two virtual images of the same slit. A conventional double-slit experiment required a preliminary single slit to ensure that the light falling on the double slit was coherent (synchronized). In Fresnel's version, the preliminary single slit was retained, and the double slit was replaced by the double mirror—which bore no physical resemblance to the double slit and yet performed the same function. This result (which had been announced by Arago in the March issue of the Annales) made it hard to believe that the two-slit pattern had anything to do with corpuscles being deflected as they passed near the edges of the slits. But 1816 was the "Year Without a Summer": crops failed; hungry farming families lined the streets of Rennes; the central government organized "charity workhouses" for the needy; and in October, Fresnel was sent back to Ille-et-Vilaine to supervise charity workers in addition to his regular road crew. According to Arago, Fresnel's letters from December 1816 reveal his consequent anxiety. To Arago he complained of being "tormented by the worries of surveillance, and the need to reprimand…" And to Mérimée he wrote: "I find nothing more tiresome than having to manage other men, and I admit that I have no idea what I'm doing." Prize memoir (1818) and sequel On 17 March 1817, the Académie des Sciences announced that diffraction would be the topic for the biannual physics Grand Prix to be awarded in 1819. The deadline for entries was set at 1 August 1818 to allow time for replication of experiments. Although the wording of the problem referred to rays and inflection and did not invite wave-based solutions, Arago and Ampère encouraged Fresnel to enter. In the fall of 1817, Fresnel, supported by de Prony, obtained a leave of absence from the new head of the Corp des Ponts, Louis Becquey, and returned to Paris. He resumed his engineering duties in the spring of 1818; but from then on he was based in Paris, first on the Canal de l'Ourcq, and then (from May 1819) with the cadastre of the pavements. On 15 January 1818, in a different context (revisited below), Fresnel showed that the addition of sinusoidal functions of the same frequency but different phases is analogous to the addition of forces with different directions. His method was similar to the phasor representation, except that the "forces" were plane vectors rather than complex numbers; they could be added, and multiplied by scalars, but not (yet) multiplied and divided by each other. The explanation was algebraic rather than geometric. Knowledge of this method was assumed in a preliminary note on diffraction, dated 19 April 1818 and deposited on 20 April, in which Fresnel outlined the elementary theory of diffraction as found in modern textbooks. He restated Huygens's principle in combination with the superposition principle, saying that the vibration at each point on a wavefront is the sum of the vibrations that would be sent to it at that moment by all the elements of the wavefront in any of its previous positions, all elements acting separately . For a wavefront partly obstructed in a previous position, the summation was to be carried out over the unobstructed portion. In directions other than the normal to the primary wavefront, the secondary waves were weakened due to obliquity, but weakened much more by destructive interference, so that the effect of obliquity alone could be ignored. For diffraction by a straight edge, the intensity as a function of distance from the geometric shadow could then be expressed with sufficient accuracy in terms of what are now called the normalized Fresnel integrals: The same note included a table of the integrals, for an upper limit ranging from 0 to 5.1 in steps of 0.1, computed with a mean error of 0.0003, plus a smaller table of maxima and minima of the resulting intensity. In his final "Memoir on the diffraction of light", deposited on 29 July and bearing the Latin epigraph "Natura simplex et fecunda" ("Nature simple and fertile"), Fresnel slightly expanded the two tables without changing the existing figures, except for a correction to the first minimum of intensity. For completeness, he repeated his solution to "the problem of interference", whereby sinusoidal functions are added like vectors. He acknowledged the directionality of the secondary sources and the variation in their distances from the observation point, chiefly to explain why these things make negligible difference in the context, provided of course that the secondary sources do not radiate in the retrograde direction. Then, applying his theory of interference to the secondary waves, he expressed the intensity of light diffracted by a single straight edge (half-plane) in terms of integrals which involved the dimensions of the problem, but which could be converted to the normalized forms above. With reference to the integrals, he explained the calculation of the maxima and minima of the intensity (external fringes), and noted that the calculated intensity falls very rapidly as one moves into the geometric shadow. The last result, as Olivier Darrigol says, "amounts to a proof of the rectilinear propagation of light in the wave theory, indeed the first proof that a modern physicist would still accept." For the experimental testing of his calculations, Fresnel used red light with a wavelength of 638nm, which he deduced from the diffraction pattern in the simple case in which light incident on a single slit was focused by a cylindrical lens. For a variety of distances from the source to the obstacle and from the obstacle to the field point, he compared the calculated and observed positions of the fringes for diffraction by a half-plane, a slit, and a narrow strip—concentrating on the minima, which were visually sharper than the maxima. For the slit and the strip, he could not use the previously computed table of maxima and minima; for each combination of dimensions, the intensity had to be expressed in terms of sums or differences of Fresnel integrals and calculated from the table of integrals, and the extrema had to be calculated anew. The agreement between calculation and measurement was better than 1.5% in almost every case. Near the end of the memoir, Fresnel summed up the difference between Huygens's use of secondary waves and his own: whereas Huygens says there is light only where the secondary waves exactly agree, Fresnel says there is complete darkness only where the secondary waves exactly cancel out. The judging committee comprised Laplace, Biot, and Poisson (all corpuscularists), Gay-Lussac (uncommitted), and Arago, who eventually wrote the committee's report. Although entries in the competition were supposed to be anonymous to the judges, Fresnel's must have been recognizable by the content. There was only one other entry, of which neither the manuscript nor any record of the author has survived. That entry (identified as "no.1") was mentioned only in the last paragraph of the judges' report, noting that the author had shown ignorance of the relevant earlier works of Young and Fresnel, used insufficiently precise methods of observation, overlooked known phenomena, and made obvious errors. In the words of John Worrall, "The competition facing Fresnel could hardly have been less stiff." We may infer that the committee had only two options: award the prize to Fresnel ("no. 2"), or withhold it. The committee deliberated into the new year. Then Poisson, exploiting a case in which Fresnel's theory gave easy integrals, predicted that if a circular obstacle were illuminated by a point-source, there should be (according to the theory) a bright spot in the center of the shadow, illuminated as brightly as the exterior. This seems to have been intended as a reductio ad absurdum. Arago, undeterred, assembled an experiment with an obstacle 2mm in diameter—and there, in the center of the shadow, was Poisson's spot. The unanimous report of the committee, read at the meeting of the Académie on 15 March 1819, awarded the prize to "the memoir marked no. 2, and bearing as epigraph: Natura simplex et fecunda." At the same meeting, after the judgment was delivered, the president of the Académie opened a sealed note accompanying the memoir, revealing the author as Fresnel. The award was announced at the public meeting of the Académie a week later, on 22 March. Arago's verification of Poisson's counter-intuitive prediction passed into folklore as if it had decided the prize. That view, however, is not supported by the judges' report, which gave the matter only two sentences in the penultimate paragraph. Neither did Fresnel's triumph immediately convert Laplace, Biot, and Poisson to the wave theory, for at least four reasons. First, although the professionalization of science in France had established common standards, it was one thing to acknowledge a piece of research as meeting those standards, and another thing to regard it as conclusive. Second, it was possible to interpret Fresnel's integrals as rules for combining rays. Arago even encouraged that interpretation, presumably in order to minimize resistance to Fresnel's ideas. Even Biot began teaching the Huygens-Fresnel principle without committing himself to a wave basis. Third, Fresnel's theory did not adequately explain the mechanism of generation of secondary waves or why they had any significant angular spread; this issue particularly bothered Poisson. Fourth, the question that most exercised optical physicists at that time was not diffraction, but polarization—on which Fresnel had been working, but was yet to make his critical breakthrough. Polarization Background: Emissionism and selectionism An emission theory of light was one that regarded the propagation of light as the transport of some kind of matter. While the corpuscular theory was obviously an emission theory, the converse did not follow: in principle, one could be an emissionist without being a corpuscularist. This was convenient because, beyond the ordinary laws of reflection and refraction, emissionists never managed to make testable quantitative predictions from a theory of forces acting on corpuscles of light. But they did make quantitative predictions from the premises that rays were countable objects, which were conserved in their interactions with matter (except absorbent media), and which had particular orientations with respect to their directions of propagation. According to this framework, polarization and the related phenomena of double refraction and partial reflection involved altering the orientations of the rays and/or selecting them according to orientation, and the state of polarization of a beam (a bundle of rays) was a question of how many rays were in what orientations: in a fully polarized beam, the orientations were all the same. This approach, which Jed Buchwald has called selectionism, was pioneered by Malus and diligently pursued by Biot. Fresnel, in contrast, decided to introduce polarization into interference experiments. Interference of polarized light, chromatic polarization (1816–21) In July or August 1816, Fresnel discovered that when a birefringent crystal produced two images of a single slit, he could not obtain the usual two-slit interference pattern, even if he compensated for the different propagation times. A more general experiment, suggested by Arago, found that if the two beams of a double-slit device were separately polarized, the interference pattern appeared and disappeared as the polarization of one beam was rotated, giving full interference for parallel polarizations, but no interference for perpendicular polarizations . These experiments, among others, were eventually reported in a brief memoir published in 1819 and later translated into English. In a memoir drafted on 30 August 1816 and revised on 6 October, Fresnel reported an experiment in which he placed two matching thin laminae in a double-slit apparatus—one over each slit, with their optic axes perpendicular—and obtained two interference patterns offset in opposite directions, with perpendicular polarizations. This, in combination with the previous findings, meant that each lamina split the incident light into perpendicularly polarized components with different velocities—just like a normal (thick) birefringent crystal, and contrary to Biot's "mobile polarization" hypothesis. Accordingly, in the same memoir, Fresnel offered his first attempt at a wave theory of chromatic polarization. When polarized light passed through a crystal lamina, it was split into ordinary and extraordinary waves (with intensities described by Malus's law), and these were perpendicularly polarized and therefore did not interfere, so that no colors were produced (yet). But if they then passed through an analyzer (second polarizer), their polarizations were brought into alignment (with intensities again modified according to Malus's law), and they would interfere. This explanation, by itself, predicts that if the analyzer is rotated 90°, the ordinary and extraordinary waves simply switch roles, so that if the analyzer takes the form of a calcite crystal, the two images of the lamina should be of the same hue (this issue is revisited below). But in fact, as Arago and Biot had found, they are of complementary colors. To correct the prediction, Fresnel proposed a phase-inversion rule whereby one of the constituent waves of one of the two images suffered an additional 180° phase shift on its way through the lamina. This inversion was a weakness in the theory relative to Biot's, as Fresnel acknowledged, although the rule specified which of the two images had the inverted wave. Moreover, Fresnel could deal only with special cases, because he had not yet solved the problem of superposing sinusoidal functions with arbitrary phase differences due to propagation at different velocities through the lamina. He solved that problem in a "supplement" signed on 15 January 1818 (mentioned above). In the same document, he accommodated Malus's law by proposing an underlying law: that if polarized light is incident on a birefringent crystal with its optic axis at an angle θ to the "plane of polarization", the ordinary and extraordinary vibrations (as functions of time) are scaled by the factors cosθ and sinθ, respectively. Although modern readers easily interpret these factors in terms of perpendicular components of a transverse oscillation, Fresnel did not (yet) explain them that way. Hence he still needed the phase-inversion rule. He applied all these principles to a case of chromatic polarization not covered by Biot's formulae, involving two successive laminae with axes separated by 45°, and obtained predictions that disagreed with Biot's experiments (except in special cases) but agreed with his own. Fresnel applied the same principles to the standard case of chromatic polarization, in which one birefringent lamina was sliced parallel to its axis and placed between a polarizer and an analyzer. If the analyzer took the form of a thick calcite crystal with its axis in the plane of polarization, Fresnel predicted that the intensities of the ordinary and extraordinary images of the lamina were respectively proportional to where is the angle from the initial plane of polarization to the optic axis of the lamina, is the angle from the initial plane of polarization to the plane of polarization of the final ordinary image, and is the phase lag of the extraordinary wave relative to the ordinary wave due to the difference in propagation times through the lamina. The terms in are the frequency-dependent terms and explain why the lamina must be thin in order to produce discernible colors: if the lamina is too thick, will pass through too many cycles as the frequency varies through the visible range, and the eye (which divides the visible spectrum into only three bands) will not be able to resolve the cycles. From these equations it is easily verified that for all so that the colors are complementary. Without the phase-inversion rule, there would be a plus sign in front of the last term in the second equation, so that the -dependent term would be the same in both equations, implying (incorrectly) that the colors were of the same hue. These equations were included in an undated note that Fresnel gave to Biot, to which Biot added a few lines of his own. If we substitute and then Fresnel's formulae can be rewritten as which are none other than Biot's empirical formulae of 1812, except that Biot interpreted and as the "unaffected" and "affected" selections of the rays incident on the lamina. If Biot's substitutions were accurate, they would imply that his experimental results were more fully explained by Fresnel's theory than by his own. Arago delayed reporting on Fresnel's works on chromatic polarization until June 1821, when he used them in a broad attack on Biot's theory. In his written response, Biot protested that Arago's attack went beyond the proper scope of a report on the nominated works of Fresnel. But Biot also claimed that the substitutions for and and therefore Fresnel's expressions for and were empirically wrong because when Fresnel's intensities of spectral colors were mixed according to Newton's rules, the squared cosine and sine functions varied too smoothly to account for the observed sequence of colors. That claim drew a written reply from Fresnel, who disputed whether the colors changed as abruptly as Biot claimed, and whether the human eye could judge color with sufficient objectivity for the purpose. On the latter question, Fresnel pointed out that different observers may give different names to the same color. Furthermore, he said, a single observer can only compare colors side by side; and even if they are judged to be the same, the identity is of sensation, not necessarily of composition. Fresnel's oldest and strongest point—that thin crystals were subject to the same laws as thick ones and did not need or allow a separate theory—Biot left unanswered. Arago and Fresnel were seen to have won the debate. Moreover, by this time Fresnel had a new, simpler explanation of his equations on chromatic polarization. Breakthrough: Pure transverse waves (1821) In the draft memoir of 30 August 1816, Fresnel mentioned two hypotheses—one of which he attributed to Ampère—by which the non-interference of orthogonally-polarized beams could be explained if polarized light waves were partly transverse. But Fresnel could not develop either of these ideas into a comprehensive theory. As early as September 1816, according to his later account, he realized that the non-interference of orthogonally-polarized beams, together with the phase-inversion rule in chromatic polarization, would be most easily explained if the waves were purely transverse, and Ampère "had the same thought" on the phase-inversion rule. But that would raise a new difficulty: as natural light seemed to be unpolarized and its waves were therefore presumed to be longitudinal, one would need to explain how the longitudinal component of vibration disappeared on polarization, and why it did not reappear when polarized light was reflected or refracted obliquely by a glass plate. Independently, on 12 January 1817, Young wrote to Arago (in English) noting that a transverse vibration would constitute a polarization, and that if two longitudinal waves crossed at a significant angle, they could not cancel without leaving a residual transverse vibration. Young repeated this idea in an article published in a supplement to the Encyclopædia Britannica in February 1818, in which he added that Malus's law would be explained if polarization consisted in a transverse motion. Thus Fresnel, by his own testimony, may not have been the first person to suspect that light waves could have a transverse component, or that polarized waves were exclusively transverse. And it was Young, not Fresnel, who first published the idea that polarization depends on the orientation of a transverse vibration. But these incomplete theories had not reconciled the nature of polarization with the apparent existence of unpolarized light; that achievement was to be Fresnel's alone. In a note that Buchwald dates in the summer of 1818, Fresnel entertained the idea that unpolarized waves could have vibrations of the same energy and obliquity, with their orientations distributed uniformly about the wave-normal, and that the degree of polarization was the degree of non-uniformity in the distribution. Two pages later he noted, apparently for the first time in writing, that his phase-inversion rule and the non-interference of orthogonally-polarized beams would be easily explained if the vibrations of fully polarized waves were "perpendicular to the normal to the wave"—that is, purely transverse. But if he could account for lack of polarization by averaging out the transverse component, he did not also need to assume a longitudinal component. It was enough to suppose that light waves are purely transverse, hence always polarized in the sense of having a particular transverse orientation, and that the "unpolarized" state of natural or "direct" light is due to rapid and random variations in that orientation, in which case two coherent portions of "unpolarized" light will still interfere because their orientations will be synchronized. It is not known exactly when Fresnel made this last step, because there is no relevant documentation from 1820 or early 1821 (perhaps because he was too busy working on lighthouse-lens prototypes; see below). But he first published the idea in a paper on "Calcul des teintes…" ("calculation of the tints…"), serialized in Arago's Annales for May, June, and July 1821. In the first installment, Fresnel described "direct" (unpolarized) light as "the rapid succession of systems of waves polarized in all directions", and gave what is essentially the modern explanation of chromatic polarization, albeit in terms of the analogy between polarization and the resolution of forces in a plane, mentioning transverse waves only in a footnote. The introduction of transverse waves into the main argument was delayed to the second installment, in which he revealed the suspicion that he and Ampère had harbored since 1816, and the difficulty it raised. He continued: According to this new view, he wrote, "the act of polarization consists not in creating these transverse movements, but in decomposing them into two fixed perpendicular directions and in separating the two components". While selectionists could insist on interpreting Fresnel's diffraction integrals in terms of discrete, countable rays, they could not do the same with his theory of polarization. For a selectionist, the state of polarization of a beam concerned the distribution of orientations over the population of rays, and that distribution was presumed to be static. For Fresnel, the state of polarization of a beam concerned the variation of a displacement over time. That displacement might be constrained but was not static, and rays were geometric constructions, not countable objects. The conceptual gap between the wave theory and selectionism had become unbridgeable. The other difficulty posed by pure transverse waves, of course, was the apparent implication that the aether was an elastic solid, except that, unlike other elastic solids, it was incapable of transmitting longitudinal waves. The wave theory was cheap on assumptions, but its latest assumption was expensive on credulity. If that assumption was to be widely entertained, its explanatory power would need to be impressive. Partial reflection (1821) In the second installment of "Calcul des teintes" (June 1821), Fresnel supposed, by analogy with sound waves, that the density of the aether in a refractive medium was inversely proportional to the square of the wave velocity, and therefore directly proportional to the square of the refractive index. For reflection and refraction at the surface between two isotropic media of different indices, Fresnel decomposed the transverse vibrations into two perpendicular components, now known as the s and p components, which are parallel to the surface and the plane of incidence, respectively; in other words, the s and p components are respectively square and parallel to the plane of incidence. For the s component, Fresnel supposed that the interaction between the two media was analogous to an elastic collision, and obtained a formula for what we now call the reflectivity: the ratio of the reflected intensity to the incident intensity. The predicted reflectivity was non-zero at all angles. The third installment (July 1821) was a short "postscript" in which Fresnel announced that he had found, by a "mechanical solution", a formula for the reflectivity of the p component, which predicted that the reflectivity was zero at the Brewster angle. So polarization by reflection had been accounted for—but with the proviso that the direction of vibration in Fresnel's model was perpendicular to the plane of polarization as defined by Malus. (On the ensuing controversy, see Plane of polarization.) The technology of the time did not allow the s and p reflectivities to be measured accurately enough to test Fresnel's formulae at arbitrary angles of incidence. But the formulae could be rewritten in terms of what we now call the reflection coefficient: the signed ratio of the reflected amplitude to the incident amplitude. Then, if the plane of polarization of the incident ray was at 45° to the plane of incidence, the tangent of the corresponding angle for the reflected ray was obtainable from the ratio of the two reflection coefficients, and this angle could be measured. Fresnel had measured it for a range of angles of incidence, for glass and water, and the agreement between the calculated and measured angles was better than 1.5° in all cases. Fresnel gave details of the "mechanical solution" in a memoir read to the Académie des Sciences on 7 January 1823. Conservation of energy was combined with continuity of the tangential vibration at the interface. The resulting formulae for the reflection coefficients and reflectivities became known as the Fresnel equations. The reflection coefficients for the s and p polarizations are most succinctly expressed as and where and are the angles of incidence and refraction; these equations are known respectively as Fresnel's sine law and Fresnel's tangent law. By allowing the coefficients to be complex, Fresnel even accounted for the different phase shifts of the s and p components due to total internal reflection. This success inspired James MacCullagh and Augustin-Louis Cauchy, beginning in 1836, to analyze reflection from metals by using the Fresnel equations with a complex refractive index. The same technique is applicable to non-metallic opaque media. With these generalizations, the Fresnel equations can predict the appearance of a wide variety of objects under illumination—for example, in computer graphics . Circular and elliptical polarization, optical rotation (1822) In a memoir dated 9 December 1822, Fresnel coined the terms linear polarization (French: polarisation rectiligne) for the simple case in which the perpendicular components of vibration are in phase or 180° out of phase, circular polarization for the case in which they are of equal magnitude and a quarter-cycle (±90°) out of phase, and elliptical polarization for other cases in which the two components have a fixed amplitude ratio and a fixed phase difference. He then explained how optical rotation could be understood as a species of birefringence. Linearly-polarized light could be resolved into two circularly-polarized components rotating in opposite directions. If these components propagated at slightly different speeds, the phase difference between them—and therefore the direction of their linearly-polarized resultant—would vary continuously with distance. These concepts called for a redefinition of the distinction between polarized and unpolarized light. Before Fresnel, it was thought that polarization could vary in direction, and in degree (e.g., due to variation in the angle of reflection off a transparent body), and that it could be a function of color (chromatic polarization), but not that it could vary in kind. Hence it was thought that the degree of polarization was the degree to which the light could be suppressed by an analyzer with the appropriate orientation. Light that had been converted from linear to elliptical or circular polarization (e.g., by passage through a crystal lamina, or by total internal reflection) was described as partly or fully "depolarized" because of its behavior in an analyzer. After Fresnel, the defining feature of polarized light was that the perpendicular components of vibration had a fixed ratio of amplitudes and a fixed difference in phase. By that definition, elliptically or circularly polarized light is fully polarized although it cannot be fully suppressed by an analyzer alone. The conceptual gap between the wave theory and selectionism had widened again. Total internal reflection (1817–23) By 1817 it had been discovered by Brewster, but not adequately reported, that plane-polarized light was partly depolarized by total internal reflection if initially polarized at an acute angle to the plane of incidence. Fresnel rediscovered this effect and investigated it by including total internal reflection in a chromatic-polarization experiment. With the aid of his first theory of chromatic polarization, he found that the apparently depolarized light was a mixture of components polarized parallel and perpendicular to the plane of incidence, and that the total reflection introduced a phase difference between them. Choosing an appropriate angle of incidence (not yet exactly specified) gave a phase difference of 1/8 of a cycle (45°). Two such reflections from the "parallel faces" of "two coupled prisms" gave a phase difference of 1/4 of a cycle (90°). These findings were contained in a memoir submitted to the Académie on 10 November 1817 and read a fortnight later. An undated marginal note indicates that the two coupled prisms were later replaced by a single "parallelepiped in glass"—now known as a Fresnel rhomb. This was the memoir whose "supplement", dated January 1818, contained the method of superposing sinusoidal functions and the restatement of Malus's law in terms of amplitudes. In the same supplement, Fresnel reported his discovery that optical rotation could be emulated by passing the polarized light through a Fresnel rhomb (still in the form of "coupled prisms"), followed by an ordinary birefringent lamina sliced parallel to its axis, with the axis at 45° to the plane of reflection of the Fresnel rhomb, followed by a second Fresnel rhomb at 90° to the first. In a further memoir read on 30 March, Fresnel reported that if polarized light was fully "depolarized" by a Fresnel rhomb—now described as a parallelepiped—its properties were not further modified by a subsequent passage through an optically rotating medium or device. The connection between optical rotation and birefringence was further explained in 1822, in the memoir on elliptical and circular polarization. This was followed by the memoir on reflection, read in January 1823, in which Fresnel quantified the phase shifts in total internal reflection, and thence calculated the precise angle at which a Fresnel rhomb should be cut in order to convert linear polarization to circular polarization. For a refractive index of 1.51, there were two solutions: about 48.6° and 54.6°. Double refraction Background: Uniaxial and biaxial crystals; Biot's laws When light passes through a slice of calcite cut perpendicular to its optic axis, the difference between the propagation times of the ordinary and extraordinary waves has a second-order dependence on the angle of incidence. If the slice is observed in a highly convergent cone of light, that dependence becomes significant, so that a chromatic-polarization experiment will show a pattern of concentric rings. But most minerals, when observed in this manner, show a more complicated pattern of rings involving two foci and a lemniscate curve, as if they had two optic axes. The two classes of minerals naturally become known as uniaxal and biaxal—or, in later literature, uniaxial and biaxial. In 1813, Brewster observed the simple concentric pattern in "beryl, emerald, ruby &c." The same pattern was later observed in calcite by Wollaston, Biot, and Seebeck. Biot, assuming that the concentric pattern was the general case, tried to calculate the colors with his theory of chromatic polarization, and succeeded better for some minerals than for others. In 1818, Brewster belatedly explained why: seven of the twelve minerals employed by Biot had the lemniscate pattern, which Brewster had observed as early as 1812; and the minerals with the more complicated rings also had a more complicated law of refraction. In a uniform crystal, according to Huygens's theory, the secondary wavefront that expands from the origin in unit time is the ray-velocity surface—that is, the surface whose "distance" from the origin in any direction is the ray velocity in that direction. In calcite, this surface is two-sheeted, consisting of a sphere (for the ordinary wave) and an oblate spheroid (for the extraordinary wave) touching each other at opposite points of a common axis—touching at the north and south poles, if we may use a geographic analogy. But according to Malus's corpuscular theory of double refraction, the ray velocity was proportional to the reciprocal of that given by Huygens's theory, in which case the velocity law was of the form where and were the ordinary and extraordinary ray velocities according to the corpuscular theory, and was the angle between the ray and the optic axis. By Malus's definition, the plane of polarization of a ray was the plane of the ray and the optic axis if the ray was ordinary, or the perpendicular plane (containing the ray) if the ray was extraordinary. In Fresnel's model, the direction of vibration was normal to the plane of polarization. Hence, for the sphere (the ordinary wave), the vibration was along the lines of latitude (continuing the geographic analogy); and for the spheroid (the extraordinary wave), the vibration was along the lines of longitude. On 29 March 1819, Biot presented a memoir in which he proposed simple generalizations of Malus's rules for a crystal with two axes, and reported that both generalizations seemed to be confirmed by experiment. For the velocity law, the squared sine was replaced by the product of the sines of the angles from the ray to the two axes (Biot's sine law). And for the polarization of the ordinary ray, the plane of the ray and the axis was replaced by the plane bisecting the dihedral angle between the two planes each of which contained the ray and one axis (Biot's dihedral law). Biot's laws meant that a biaxial crystal with axes at a small angle, cleaved in the plane of those axes, behaved nearly like a uniaxial crystal at near-normal incidence; this was fortunate because gypsum, which had been used in chromatic-polarization experiments, is biaxial. First memoir and supplements (1821–22) Until Fresnel turned his attention to biaxial birefringence, it was assumed that one of the two refractions was ordinary, even in biaxial crystals. But, in a memoir submitted on 19 November 1821, Fresnel reported two experiments on topaz showing that neither refraction was ordinary in the sense of satisfying Snell's law; that is, neither ray was the product of spherical secondary waves. The same memoir contained Fresnel's first attempt at the biaxial velocity law. For calcite, if we interchange the equatorial and polar radii of Huygens's oblate spheroid while preserving the polar direction, we obtain a prolate spheroid touching the sphere at the equator. A plane through the center/origin cuts this prolate spheroid in an ellipse whose major and minor semi-axes give the magnitudes of the extraordinary and ordinary ray velocities in the direction normal to the plane, and (said Fresnel) the directions of their respective vibrations. The direction of the optic axis is the normal to the plane for which the ellipse of intersection reduces to a circle. So, for the biaxial case, Fresnel simply replaced the prolate spheroid with a triaxial ellipsoid, which was to be sectioned by a plane in the same way. In general there would be two planes passing through the center of the ellipsoid and cutting it in a circle, and the normals to these planes would give two optic axes. From the geometry, Fresnel deduced Biot's sine law (with the ray velocities replaced by their reciprocals). The ellipsoid indeed gave the correct ray velocities (although the initial experimental verification was only approximate). But it did not give the correct directions of vibration, for the biaxial case or even for the uniaxial case, because the vibrations in Fresnel's model were tangential to the wavefront—which, for an extraordinary ray, is not generally normal to the ray. This error (which is small if, as in most cases, the birefringence is weak) was corrected in an "extract" that Fresnel read to the Académie a week later, on 26 November. Starting with Huygens's spheroid, Fresnel obtained a 4th-degree surface which, when sectioned by a plane as above, would yield the wave-normal velocities for a wavefront in that plane, together with their vibration directions. For the biaxial case, he generalized the equation to obtain a surface with three unequal principal dimensions; this he subsequently called the "surface of elasticity". But he retained the earlier ellipsoid as an approximation, from which he deduced Biot's dihedral law. Fresnel's initial derivation of the surface of elasticity had been purely geometric, and not deductively rigorous. His first attempt at a mechanical derivation, contained in a "supplement" dated 13 January 1822, assumed that (i) there were three mutually perpendicular directions in which a displacement produced a reaction in the same direction, (ii) the reaction was otherwise a linear function of the displacement, and (iii) the radius of the surface in any direction was the square root of the component, in that direction, of the reaction to a unit displacement in that direction. The last assumption recognized the requirement that if a wave was to maintain a fixed direction of propagation and a fixed direction of vibration, the reaction must not be outside the plane of those two directions. In the same supplement, Fresnel considered how he might find, for the biaxial case, the secondary wavefront that expands from the origin in unit time—that is, the surface that reduces to Huygens's sphere and spheroid in the uniaxial case. He noted that this "wave surface" (surface de l'onde) is tangential to all possible plane wavefronts that could have crossed the origin one unit of time ago, and he listed the mathematical conditions that it must satisfy. But he doubted the feasibility of deriving the surface from those conditions. In a "second supplement", Fresnel eventually exploited two related facts: (i) the "wave surface" was also the ray-velocity surface, which could be obtained by sectioning the ellipsoid that he had initially mistaken for the surface of elasticity, and (ii) the "wave surface" intersected each plane of symmetry of the ellipsoid in two curves: a circle and an ellipse. Thus he found that the "wave surface" is described by the 4th-degree equation where and are the propagation speeds in directions normal to the coordinate axes for vibrations along the axes (the ray and wave-normal speeds being the same in those special cases). Later commentators put the equation in the more compact and memorable form Earlier in the "second supplement", Fresnel modeled the medium as an array of point-masses and found that the force-displacement relation was described by a symmetric matrix, confirming the existence of three mutually perpendicular axes on which the displacement produced a parallel force. Later in the document, he noted that in a biaxial crystal, unlike a uniaxial crystal, the directions in which there is only one wave-normal velocity are not the same as those in which there is only one ray velocity. Nowadays we refer to the former directions as the optic axes or binormal axes, and the latter as the ray axes or biradial axes . Fresnel's "second supplement" was signed on 31 March 1822 and submitted the next day—less than a year after the publication of his pure-transverse-wave hypothesis, and just less than a year after the demonstration of his prototype eight-panel lighthouse lens . Second memoir (1822–26) Having presented the pieces of his theory in roughly the order of discovery, Fresnel needed to rearrange the material so as to emphasize the mechanical foundations; and he still needed a rigorous treatment of Biot's dihedral law. He attended to these matters in his "second memoir" on double refraction, published in the Recueils of the Académie des Sciences for 1824; this was not actually printed until late 1827, a few months after his death. In this work, having established the three perpendicular axes on which a displacement produces a parallel reaction, and thence constructed the surface of elasticity, he showed that Biot's dihedral law is exact provided that the binormals are taken as the optic axes, and the wave-normal direction as the direction of propagation. As early as 1822, Fresnel discussed his perpendicular axes with Cauchy. Acknowledging Fresnel's influence, Cauchy went on to develop the first rigorous theory of elasticity of non-isotropic solids (1827), hence the first rigorous theory of transverse waves therein (1830)—which he promptly tried to apply to optics. The ensuing difficulties drove a long competitive effort to find an accurate mechanical model of the aether. Fresnel's own model was not dynamically rigorous; for example, it deduced the reaction to a shear strain by considering the displacement of one particle while all others were fixed, and it assumed that the stiffness determined the wave velocity as in a stretched string, whatever the direction of the wave-normal. But it was enough to enable the wave theory to do what selectionist theory could not: generate testable formulae covering a comprehensive range of optical phenomena, from mechanical assumptions. Photoelasticity, multiple-prism experiments (1822) In 1815, Brewster reported that colors appear when a slice of isotropic material, placed between crossed polarizers, is mechanically stressed. Brewster himself immediately and correctly attributed this phenomenon to stress-induced birefringence—now known as photoelasticity. In a memoir read in September 1822, Fresnel announced that he had verified Brewster's diagnosis more directly, by compressing a combination of glass prisms so severely that one could actually see a double image through it. In his experiment, Fresnel lined up seven 45°–90°–45° prisms, short side to short side, with their 90° angles pointing in alternating directions. Two half-prisms were added at the ends to make the whole assembly rectangular. The prisms were separated by thin films of turpentine (térébenthine) to suppress internal reflections, allowing a clear line of sight along the row. When the four prisms with similar orientations were compressed in a vise across the line of sight, an object viewed through the assembly produced two images with perpendicular polarizations, with an apparent spacing of 1.5mm at one metre. At the end of that memoir, Fresnel predicted that if the compressed prisms were replaced by (unstressed) monocrystalline quartz prisms with matching directions of optical rotation, and with their optic axes aligned along the row, an object seen by looking along the common optic axis would give two images, which would seem unpolarized when viewed through an analyzer but, when viewed through a Fresnel rhomb, would be polarized at ±45° to the plane of reflection of the rhomb (indicating that they were initially circularly polarized in opposite directions). This would show directly that optical rotation is a form of birefringence. In the memoir of December 1822, in which he introduced the term circular polarization, he reported that he had confirmed this prediction using only one 14°–152°–14° prism and two glass half-prisms. But he obtained a wider separation of the images by replacing the glass half-prism with quartz half-prisms whose rotation was opposite to that of the 14°–152°–14° prism. He added in passing that one could further increase the separation by increasing the number of prisms. Reception For the supplement to Riffault's translation of Thomson's System of Chemistry, Fresnel was chosen to contribute the article on light. The resulting 137-page essay, titled De la Lumière (On Light), was apparently finished in June 1821 and published by February 1822. With sections covering the nature of light, diffraction, thin-film interference, reflection and refraction, double refraction and polarization, chromatic polarization, and modification of polarization by reflection, it made a comprehensive case for the wave theory to a readership that was not restricted to physicists. To examine Fresnel's first memoir and supplements on double refraction, the Académie des Sciences appointed Ampère, Arago, Fourier, and Poisson. Their report, of which Arago was clearly the main author, was delivered at the meeting of 19 August 1822. Then, in the words of Émile Verdet, as translated by Ivor Grattan-Guinness: Whether Laplace was announcing his conversion to the wave theory—at the age of 73—is uncertain. Grattan-Guinness entertained the idea. Buchwald, noting that Arago failed to explain that the "ellipsoid of elasticity" did not give the correct planes of polarization, suggests that Laplace may have merely regarded Fresnel's theory as a successful generalization of Malus's ray-velocity law, embracing Biot's laws. In the following year, Poisson, who did not sign Arago's report, disputed the possibility of transverse waves in the aether. Starting from assumed equations of motion of a fluid medium, he noted that they did not give the correct results for partial reflection and double refraction—as if that were Fresnel's problem rather than his own—and that the predicted waves, even if they were initially transverse, became more longitudinal as they propagated. In reply Fresnel noted, inter alia, that the equations in which Poisson put so much faith did not even predict viscosity. The implication was clear: given that the behavior of light had not been satisfactorily explained except by transverse waves, it was not the responsibility of the wave-theorists to abandon transverse waves in deference to pre-conceived notions about the aether; rather, it was the responsibility of the aether modelers to produce a model that accommodated transverse waves. According to Robert H. Silliman, Poisson eventually accepted the wave theory shortly before his death in 1840. Among the French, Poisson's reluctance was an exception. According to Eugene Frankel, "in Paris no debate on the issue seems to have taken place after 1825. Indeed, almost the entire generation of physicists and mathematicians who came to maturity in the 1820s—Pouillet, Savart, Lamé, Navier, Liouville, Cauchy—seem to have adopted the theory immediately." Fresnel's other prominent French opponent, Biot, appeared to take a neutral position in 1830, and eventually accepted the wave theory—possibly by 1846 and certainly by 1858. In 1826, the British astronomer John Herschel, who was working on a book-length article on light for the Encyclopædia Metropolitana, addressed three questions to Fresnel concerning double refraction, partial reflection, and their relation to polarization. The resulting article, titled simply "Light", was highly sympathetic to the wave theory, although not entirely free of selectionist language. It was circulating privately by 1828 and was published in 1830. Meanwhile, Young's translation of Fresnel's De la Lumière was published in installments from 1827 to 1829. George Biddell Airy, the former Lucasian Professor at Cambridge and future Astronomer Royal, unreservedly accepted the wave theory by 1831. In 1834, he famously calculated the diffraction pattern of a circular aperture from the wave theory, thereby explaining the limited angular resolution of a perfect telescope . By the end of the 1830s, the only prominent British physicist who held out against the wave theory was Brewster, whose objections included the difficulty of explaining photochemical effects and (in his opinion) dispersion. A German translation of De la Lumière was published in installments in 1825 and 1828. The wave theory was adopted by Fraunhofer in the early 1820s and by Franz Ernst Neumann in the 1830s, and then began to find favor in German textbooks. The economy of assumptions under the wave theory was emphasized by William Whewell in his History of the Inductive Sciences, first published in 1837. In the corpuscular system, "every new class of facts requires a new supposition," whereas in the wave system, a hypothesis devised in order to explain one phenomenon is then found to explain or predict others. In the corpuscular system there is "no unexpected success, no happy coincidence, no convergence of principles from remote quarters"; but in the wave system, "all tends to unity and simplicity." Hence, in 1850, when Foucault and Fizeau found by experiment that light travels more slowly in water than in air, in accordance with the wave explanation of refraction and contrary to the corpuscular explanation, the result came as no surprise. Lighthouses and the Fresnel lens Fresnel was not the first person to focus a lighthouse beam using a lens. That distinction apparently belongs to the London glass-cutter Thomas Rogers, whose first lenses, 53cm in diameter and 14cm thick at the center, were installed at the Old Lower Lighthouse at Portland Bill in 1789. Further samples were installed in about half a dozen other locations by 1804. But much of the light was wasted by absorption in the glass. Nor was Fresnel the first to suggest replacing a convex lens with a series of concentric annular prisms, to reduce weight and absorption. In 1748, Count Buffon proposed grinding such prisms as steps in a single piece of glass. In 1790, the Marquis de Condorcet suggested that it would be easier to make the annular sections separately and assemble them on a frame; but even that was impractical at the time. These designs were intended not for lighthouses, but for burning glasses. Brewster, however, proposed a system similar to Condorcet's in 1811, and by 1820 was advocating its use in British lighthouses. Meanwhile, on 21 June 1819, Fresnel was "temporarily" seconded by the Commission des Phares (Commission of Lighthouses) on the recommendation of Arago (a member of the Commission since 1813), to review possible improvements in lighthouse illumination. The commission had been established by Napoleon in 1811 and placed under the Corps des Ponts—Fresnel's employer. By the end of August 1819, unaware of the Buffon-Condorcet-Brewster proposal, Fresnel made his first presentation to the commission, recommending what he called lentilles à échelons (lenses by steps) to replace the reflectors then in use, which reflected only about half of the incident light. One of the assembled commissioners, Jacques Charles, recalled Buffon's suggestion, leaving Fresnel embarrassed for having again "broken through an open door". But, whereas Buffon's version was biconvex and in one piece, Fresnel's was plano-convex and made of multiple prisms for easier construction. With an official budget of 500 francs, Fresnel approached three manufacturers. The third, François Soleil, produced the prototype. Finished in March 1820, it had a square lens panel 55cm on a side, containing 97 polygonal (not annular) prisms—and so impressed the Commission that Fresnel was asked for a full eight-panel version. This model, completed a year later in spite of insufficient funding, had panels 76cm square. In a public spectacle on the evening of 13 April 1821, it was demonstrated by comparison with the most recent reflectors, which it suddenly rendered obsolete. Fresnel's next lens was a rotating apparatus with eight "bull's-eye" panels, made in annular arcs by Saint-Gobain, giving eight rotating beams—to be seen by mariners as a periodic flash. Above and behind each main panel was a smaller, sloping bull's-eye panel of trapezoidal outline with trapezoidal elements. This refracted the light to a sloping plane mirror, which then reflected it horizontally, 7 degrees ahead of the main beam, increasing the duration of the flash. Below the main panels were 128 small mirrors arranged in four rings, stacked like the slats of a louver or Venetian blind. Each ring, shaped as a frustum of a cone, reflected the light to the horizon, giving a fainter steady light between the flashes. The official test, conducted on the unfinished Arc de Triomphe on 20 August 1822, was witnessed by the commission—and by Louis and his entourage—from 32km away. The apparatus was stored at Bordeaux for the winter, and then reassembled at Cordouan Lighthouse under Fresnel's supervision. On 25 July 1823, the world's first lighthouse Fresnel lens was lit. Soon afterwards, Fresnel started coughing up blood. In May 1824, Fresnel was promoted to secretary of the Commission des Phares, becoming the first member of that body to draw a salary, albeit in the concurrent role of Engineer-in-Chief. He was also an examiner (not a teacher) at the École Polytechnique since 1821; but poor health, long hours during the examination season, and anxiety about judging others induced him to resign that post in late 1824, to save his energy for his lighthouse work. In the same year he designed the first fixed lens—for spreading light evenly around the horizon while minimizing waste above or below. Ideally the curved refracting surfaces would be segments of toroids about a common vertical axis, so that the dioptric panel would look like a cylindrical drum. If this was supplemented by reflecting (catoptric) rings above and below the refracting (dioptric) parts, the entire apparatus would look like a beehive. The second Fresnel lens to enter service was indeed a fixed lens, of third order, installed at Dunkirk by 1 February 1825. However, due to the difficulty of fabricating large toroidal prisms, this apparatus had a 16-sided polygonal plan. In 1825, Fresnel extended his fixed-lens design by adding a rotating array outside the fixed array. Each panel of the rotating array was to refract part of the fixed light from a horizontal fan into a narrow beam. Also in 1825, Fresnel unveiled the Carte des Phares (Lighthouse Map), calling for a system of 51 lighthouses plus smaller harbor lights, in a hierarchy of lens sizes (called orders, the first order being the largest), with different characteristics to facilitate recognition: a constant light (from a fixed lens), one flash per minute (from a rotating lens with eight panels), and two per minute (sixteen panels). In late 1825, to reduce the loss of light in the reflecting elements, Fresnel proposed to replace each mirror with a catadioptric prism, through which the light would travel by refraction through the first surface, then total internal reflection off the second surface, then refraction through the third surface. The result was the lighthouse lens as we now know it. In 1826 he assembled a small model for use on the Canal Saint-Martin, but he did not live to see a full-sized version. The first fixed lens with toroidal prisms was a first-order apparatus designed by the Scottish engineer Alan Stevenson under the guidance of Léonor Fresnel, and fabricated by Isaac Cookson & Co. from French glass; it entered service at the Isle of May in 1836. The first large catadioptric lenses were fixed third-order lenses made in 1842 for the lighthouses at Gravelines and Île Vierge. The first fully catadioptric first-order lens, installed at Ailly in 1852, gave eight rotating beams assisted by eight catadioptric panels at the top (to lengthen the flashes), plus a fixed light from below. The first fully catadioptric lens with purely revolving beams—also of first order—was installed at Saint-Clément-des-Baleines in 1854, and marked the completion of Augustin Fresnel's original Carte des Phares. Production of one-piece stepped dioptric lenses—roughly as envisaged by Buffon—became practical in 1852, when John L. Gilliland of the Brooklyn Flint-Glass Company patented a method of making such lenses from press-molded glass. By the 1950s, the substitution of plastic for glass made it economic to use fine-stepped Fresnel lenses as condensers in overhead projectors. Still finer steps can be found in low-cost plastic "sheet" magnifiers. Honors Fresnel was elected to the Société Philomathique de Paris in April 1819, and in 1822 became one of the editors of the Société's Bulletin des Sciences. As early as May 1817, at Arago's suggestion, Fresnel applied for membership of the Académie des Sciences, but received only one vote. The successful candidate on that occasion was Joseph Fourier. In November 1822, Fourier's elevation to Permanent Secretary of the Académie created a vacancy in the physics section, which was filled in February 1823 by Pierre Louis Dulong, with 36 votes to Fresnel's 20. But in May 1823, after another vacancy was left by the death of Jacques Charles, Fresnel's election was unanimous. In 1824, Fresnel was made a chevalier de la Légion d'honneur (Knight of the Legion of Honour). Meanwhile, in Britain, the wave theory was yet to take hold; Fresnel wrote to Thomas Young in November 1824, saying in part: But "the praise of English scholars" soon followed. On 9 June 1825, Fresnel was made a Foreign Member of the Royal Society of London. In 1827 he was awarded the society's Rumford Medal for the year 1824, "For his Development of the Undulatory Theory as applied to the Phenomena of Polarized Light, and for his various important discoveries in Physical Optics." A monument to Fresnel at his birthplace was dedicated on 14 September 1884 with a speech by , Permanent Secretary of the Académie des Sciences. "" is among the 72 names embossed on the Eiffel Tower (on the south-east side, fourth from the left). In the 19th century, as every lighthouse in France acquired a Fresnel lens, every one acquired a bust of Fresnel, seemingly watching over the coastline that he had made safer. The lunar features Promontorium Fresnel and Rimae Fresnel were later named after him. Decline and death Fresnel's health, which had always been poor, deteriorated in the winter of 1822–1823, increasing the urgency of his original research, and (in part) preventing him from contributing an article on polarization and double refraction for the Encyclopædia Britannica. The memoirs on circular and elliptical polarization and optical rotation, and on the detailed derivation of the Fresnel equations and their application to total internal reflection, date from this period. In the spring he recovered enough, in his own view, to supervise the lens installation at Cordouan. Soon afterwards, it became clear that his condition was tuberculosis. In 1824, he was advised that if he wanted to live longer, he needed to scale back his activities. Perceiving his lighthouse work to be his most important duty, he resigned as an examiner at the École Polytechnique, and closed his scientific notebooks. His last note to the Académie, read on 13 June 1825, described the first radiometer and attributed the observed repulsive force to a temperature difference. Although his fundamental research ceased, his advocacy did not; as late as August or September 1826, he found the time to answer Herschel's queries on the wave theory. It was Herschel who recommended Fresnel for the Royal Society's Rumford Medal. Fresnel's cough worsened in the winter of 1826–1827, leaving him too ill to return to Mathieu in the spring. The Académie meeting of 30 April 1827 was the last that he attended. In early June he was carried to Ville-d'Avray, west of Paris. There his mother joined him. On 6 July, Arago arrived to deliver the Rumford Medal. Sensing Arago's distress, Fresnel whispered that "the most beautiful crown means little, when it is laid on the grave of a friend." Fresnel did not have the strength to reply to the Royal Society. He died eight days later, on Bastille Day. He is buried at Père Lachaise Cemetery, Paris. The inscription on his headstone is partly eroded away; the legible part says, when translated, "To the memory of Augustin Jean Fresnel, member of the Institute of France". Posthumous publications Fresnel's "second memoir" on double refraction was not printed until late 1827, a few months after his death. Until then, the best published source on his work on double refraction was an extract of that memoir, printed in 1822. His final treatment of partial reflection and total internal reflection, read to the Académie in January 1823, was thought to be lost until it was rediscovered among the papers of the deceased Joseph Fourier (1768–1830), and was printed in 1831. Until then, it was known chiefly through an extract printed in 1823 and 1825. The memoir introducing the parallelepiped form of the Fresnel rhomb, read in March 1818, was mislaid until 1846, and then attracted such interest that it was soon republished in English. Most of Fresnel's writings on polarized light before 1821—including his first theory of chromatic polarization (submitted 7 October 1816) and the crucial "supplement" of January 1818—were not published in full until his Oeuvres complètes ("complete works") began to appear in 1866. The "supplement" of July 1816, proposing the "efficacious ray" and reporting the famous double-mirror experiment, met the same fate, as did the "first memoir" on double refraction. Publication of Fresnel's collected works was itself delayed by the deaths of successive editors. The task was initially entrusted to Félix Savary, who died in 1841. It was restarted twenty years later by the Ministry of Public Instruction. Of the three editors eventually named in the Oeuvres, Sénarmont died in 1862, Verdet in 1866, and Léonor Fresnel in 1869, by which time only two of the three volumes had appeared. At the beginning of vol. 3 (1870), the completion of the project is described in a long footnote by "J. Lissajous." Not included in the Oeuvres are two short notes by Fresnel on magnetism, which were discovered among Ampère's manuscripts. In response to Ørsted's discovery of electromagnetism in 1820, Ampère initially supposed that the field of a permanent magnet was due to a macroscopic circulating current. Fresnel suggested instead that there was a microscopic current circulating around each particle of the magnet. In his first note, he argued that microscopic currents, unlike macroscopic currents, would explain why a hollow cylindrical magnet does not lose its magnetism when cut longitudinally. In his second note, dated 5 July 1821, he further argued that a macroscopic current had the counterfactual implication that a permanent magnet should be hot, whereas microscopic currents circulating around the molecules might avoid the heating mechanism. He was not to know that the fundamental units of permanent magnetism are even smaller than molecules . The two notes, together with Ampère's acknowledgment, were eventually published in 1885. Lost works Fresnel's essay Rêveries of 1814 has not survived. While its content would have been interesting to historians, its quality may perhaps be gauged from the fact that Fresnel himself never referred to it in his maturity. More disturbing is the fate of the late article "Sur les Différents Systèmes relatifs à la Théorie de la Lumière" ("On the Different Systems relating to the Theory of Light"), which Fresnel wrote for the newly launched English journal European Review. This work seems to have been similar in scope to the essay De la Lumière of 1821/22, except that Fresnel's views on double refraction, circular and elliptical polarization, optical rotation, and total internal reflection had developed since then. The manuscript was received by the publisher's agent in Paris in early September 1824, and promptly forwarded to London. But the journal failed before Fresnel's contribution could be published. Fresnel tried unsuccessfully to recover the manuscript. The editors of his collected works were also unable to find it, and admitted that it was probably lost. Unfinished business Aether drag and aether density In 1810, Arago found experimentally that the degree of refraction of starlight does not depend on the direction of the earth's motion relative to the line of sight. In 1818, Fresnel showed that this result could be explained by the wave theory, on the hypothesis that if an object with refractive index moved at velocity relative to the external aether (taken as stationary), then the velocity of light inside the object gained the additional component . He supported that hypothesis by supposing that if the density of the external aether was taken as unity, the density of the internal aether was , of which the excess, namely , was dragged along at velocity , whence the average velocity of the internal aether was . The factor in parentheses, which Fresnel originally expressed in terms of wavelengths, became known as the Fresnel drag coefficient. In his analysis of double refraction, Fresnel supposed that the different refractive indices in different directions within the same medium were due to a directional variation in elasticity, not density (because the concept of mass per unit volume is not directional). But in his treatment of partial reflection, he supposed that the different refractive indices of different media were due to different aether densities, not different elasticities. The latter decision, although puzzling in the context of double refraction, was consistent with the earlier treatment of aether drag. In 1846, George Gabriel Stokes pointed out that there was no need to divide the aether inside a moving object into two portions; all of it could be considered as moving at a common velocity. Then, if the aether was conserved while its density changed in proportion to , the resulting velocity of the aether inside the object was equal to Fresnel's additional velocity component. Dispersion The analogy between light waves and transverse waves in elastic solids does not predict dispersion—that is, the frequency-dependence of the speed of propagation, which enables prisms to produce spectra and causes lenses to suffer from chromatic aberration. Fresnel, in De la Lumière and in the second supplement to his first memoir on double refraction, suggested that dispersion could be accounted for if the particles of the medium exerted forces on each other over distances that were significant fractions of a wavelength. Later, more than once, Fresnel referred to the demonstration of this result as being contained in a note appended to his "second memoir" on double refraction. No such note appeared in print, and the relevant manuscripts found after his death showed only that, around 1824, he was comparing refractive indices (measured by Fraunhofer) with a theoretical formula, the meaning of which was not fully explained. In the 1830s, Fresnel's suggestion was taken up by Cauchy, Baden Powell, and Philip Kelland, and it was found to be tolerably consistent with the variation of refractive indices with wavelength over the visible spectrum for a variety of transparent media . These investigations were enough to show that the wave theory was at least compatible with dispersion; if the model of dispersion was to be accurate over a wider range of frequencies, it needed to be modified so as to take account of resonances within the medium . Conical refraction The analytical complexity of Fresnel's derivation of the ray-velocity surface was an implicit challenge to find a shorter path to the result. This was answered by MacCullagh in 1830, and by William Rowan Hamilton in 1832. Hamilton went further, establishing two properties of the surface that Fresnel, in the short time given to him, had overlooked: (i) at each of the four points where the inner and outer sheets of the surface make contact, the surface has a tangent cone (tangential to both sheets), hence a cone of normals, indicating that a cone of wave-normal directions corresponds to a single ray-velocity vector; and (ii) around each of these points, the outer sheet has a circle of contact with a tangent plane, indicating that a cone of ray directions corresponds to a single wave-normal velocity vector. As Hamilton noted, these properties respectively imply that (i) a narrow beam propagating inside the crystal in the direction of the single ray velocity will, on exiting the crystal through a flat surface, break into a hollow cone (external conical refraction), and (ii) a narrow beam striking a flat surface of the crystal in the appropriate direction (corresponding to that of the single internal wave-normal velocity) will, on entering the crystal, break into a hollow cone (internal conical refraction). Thus a new pair of phenomena, qualitatively different from anything previously observed or suspected, had been predicted by mathematics as consequences of Fresnel's theory. The prompt experimental confirmation of those predictions by Humphrey Lloyd brought Hamilton a prize that had never come to Fresnel: immediate fame. Legacy Within a century of Fresnel's initial stepped-lens proposal, more than 10,000 lights with Fresnel lenses were protecting lives and property around the world. Concerning the other benefits, the science historian Theresa H. Levitt has remarked: In the history of physical optics, Fresnel's successful revival of the wave theory nominates him as the pivotal figure between Newton, who held that light consisted of corpuscles, and James Clerk Maxwell, who established that light waves are electromagnetic. Whereas Albert Einstein described Maxwell's work as "the most profound and the most fruitful that physics has experienced since the time of Newton," commentators of the era between Fresnel and Maxwell made similarly strong statements about Fresnel: MacCullagh, as early as 1830, wrote that Fresnel's mechanical theory of double refraction "would do honour to the sagacity of Newton". Lloyd, in his Report on the progress and present state of physical optics (1834) for the British Association for the Advancement of Science, surveyed previous knowledge of double refraction and declared:The theory of Fresnel to which I now proceed,—and which not only embraces all the known phenomena, but has even outstripped observation, and predicted consequences which were afterwards fully verified,—will, I am persuaded, be regarded as the finest generalization in physical science which has been made since the discovery of universal gravitation.In 1841, Lloyd published his Lectures on the Wave-theory of Light, in which he described Fresnel's transverse-wave theory as "the noblest fabric which has ever adorned the domain of physical science, Newton's system of the universe alone excepted." William Whewell, in all three editions of his History of the Inductive Sciences (1837, 1847, and 1857), at the end of Book , compared the histories of physical astronomy and physical optics and concluded:It would, perhaps, be too fanciful to attempt to establish a parallelism between the prominent persons who figure in these two histories. If we were to do this, we must consider Huyghens and Hooke as standing in the place of Copernicus, since, like him, they announced the true theory, but left it to a future age to give it development and mechanical confirmation; Malus and Brewster, grouping them together, correspond to Tycho Brahe and Kepler, laborious in accumulating observations, inventive and happy in discovering laws of phenomena; and Young and Fresnel combined, make up the Newton of optical science. What Whewell called the "true theory" has since undergone two major revisions. The first, by Maxwell, specified the physical fields whose variations constitute the waves of light. Without the benefit of this knowledge, Fresnel managed to construct the world's first coherent theory of light, showing in retrospect that his methods are applicable to multiple types of waves. The second revision, initiated by Einstein's explanation of the photoelectric effect, supposed that the energy of light waves was divided into quanta, which were eventually identified with particles called photons. But photons did not exactly correspond to Newton's corpuscles; for example, Newton's explanation of ordinary refraction required the corpuscles to travel faster in media of higher refractive index, which photons do not. Neither did photons displace waves; rather, they led to the paradox of wave–particle duality. Moreover, the phenomena studied by Fresnel, which included nearly all the optical phenomena known at his time, are still most easily explained in terms of the wave nature of light. So it was that, as late as 1927, the astronomer Eugène Michel Antoniadi declared Fresnel to be "the dominant figure in optics." See also Explanatory notes References Citations Bibliography D.F.J. Arago (tr. B. Powell), 1857, "Fresnel" (elegy read at the Public Meeting of the Academy of Sciences, 26 July 1830), in D.F.J. Arago (tr. W.H. Smyth, B. Powell, and R. Grant), Biographies of Distinguished Scientific Men (single-volume edition), London: Longman, Brown, Green, Longmans, & Roberts, 1857, pp. 399–471. (On the translator's identity, see pp. 425n,452n.) Erratum: In the translator's note on p. 413, a plane tangent to the outer sphere at point t should intersect the refractive surface (assumed flat); then, through that intersection, tangent planes should be drawn to the inner sphere and spheroid (cf. Mach, 1926, p.263). D.F.J. Arago and A. Fresnel, 1819, "Mémoire sur l'action que les rayons de lumière polarisée exercent les uns sur les autres", Annales de Chimie et de Physique, Ser.2, vol. 10, pp. 288–305, March 1819; reprinted in Fresnel, 1866–70, vol. 1, pp. 509–522; translated as "On the action of rays of polarized light upon each other", in Crew, 1900, pp. 145–155. G.-A. Boutry, 1948, "Augustin Fresnel: His time, life and work, 1788–1827", Science Progress, vol. 36, no. 144 (October 1948), pp. 587–604; jstor.org/stable/43413515. J.Z. Buchwald, 1989, The Rise of the Wave Theory of Light: Optical Theory and Experiment in the Early Nineteenth Century, University of Chicago Press, . J.Z. Buchwald, 2013, "Optics in the Nineteenth Century", in J.Z. Buchwald and R. Fox (eds.), The Oxford Handbook of the History of Physics, Oxford, , pp. 445–472. H. Crew (ed.), 1900, The Wave Theory of Light: Memoirs by Huygens, Young and Fresnel, American Book Company. O. Darrigol, 2012, A History of Optics: From Greek Antiquity to the Nineteenth Century, Oxford, . J. Elton, 2009, "A Light to Lighten our Darkness: Lighthouse Optics and the Later Development of Fresnel's Revolutionary Refracting Lens 1780–1900", International Journal for the History of Engineering & Technology, vol. 79, no. 2 (July 2009), pp. 183–244; . E. Frankel, 1974, "The search for a corpuscular theory of double refraction: Malus, Laplace and the competition of 1808", Centaurus, vol. 18, no. 3 (September 1974), pp. 223–245. E. Frankel, 1976, "Corpuscular optics and the wave theory of light: The science and politics of a revolution in physics", Social Studies of Science, vol. 6, no. 2 (May 1976), pp. 141–184; jstor.org/stable/284930. A. Fresnel, 1815a, Letter to Jean François "Léonor" Mérimée, 10 February 1815 (Smithsonian Dibner Library, MSS 546A), printed in G. Magalhães, "Remarks on a new autograph letter from Augustin Fresnel: Light aberration and wave theory", Science in Context, vol. 19, no.2 (June 2006), pp. 295–307, , at p.306 (original French) and p.307 (English translation). A. Fresnel, 1816, "Mémoire sur la diffraction de la lumière" ("Memoir on the diffraction of light"), Annales de Chimie et de Physique, Ser.2, vol. 1, pp. 239–281 (March 1816); reprinted as "Deuxième Mémoire…" ("Second Memoir…") in Fresnel, 1866–70, vol. 1, pp. 89–122. Not to be confused with the later "prize memoir" (Fresnel, 1818b). A. Fresnel, 1818a, "Mémoire sur les couleurs développées dans les fluides homogènes par la lumière polarisée", read 30 March 1818 (according to Kipnis, 1991, p. 217), published 1846; reprinted in Fresnel, 1866–70, vol. 1, pp. 655–683; translated by E. Ronalds & H. Lloyd as "Memoir upon the colours produced in homogeneous fluids by polarized light", in Taylor, 1852, pp. 44–65. (Cited page numbers refer to the translation.) A. Fresnel, 1818b, "Mémoire sur la diffraction de la lumière" ("Memoir on the diffraction of light"), deposited 29 July 1818, "crowned" 15 March 1819, published (with appended notes) in Mémoires de l'Académie Royale des Sciences de l'Institut de France, vol. (for 1821 & 1822, printed 1826), pp. 339–475; reprinted (with notes) in Fresnel, 1866–70, vol. 1, pp. 247–383; partly translated as "Fresnel's prize memoir on the diffraction of light", in Crew, 1900, pp. 81–144. Not to be confused with the earlier memoir with the same French title (Fresnel, 1816). A. Fresnel, 1818c, "Lettre de M. Fresnel à M. Arago sur l'influence du mouvement terrestre dans quelques phénomènes d'optique", Annales de Chimie et de Physique, Ser.2, vol. 9, pp. 57–66 & plate after p.111 (Sep. 1818), & pp.286–287 (Nov. 1818); reprinted in Fresnel, 1866–70, vol. 2, pp. 627–636; translated as "Letter from Augustin Fresnel to François Arago, on the influence of the movement of the earth on some phenomena of optics" in K.F. Schaffner, Nineteenth-Century Aether Theories, Pergamon, 1972 (), pp. 125–135; also translated (with several errors) by R.R. Traill as "Letter from Augustin Fresnel to François Arago concerning the influence of terrestrial movement on several optical phenomena", General Science Journal, 23 January 2006 (PDF, 8pp.). A. Fresnel, 1821a, "Note sur le calcul des teintes que la polarisation développe dans les lames cristallisées" et seq., Annales de Chimie et de Physique, Ser.2, vol. 17, pp. 102–111 (May 1821), 167–196 (June 1821), 312–315 ("Postscript", July 1821); reprinted (with added section nos.) in Fresnel, 1866–70, vol. 1, pp. 609–648; translated as "On the calculation of the tints that polarization develops in crystalline plates, & postscript", / , 2021. A. Fresnel, 1821b, "Note sur les remarques de M. Biot...", Annales de Chimie et de Physique, Ser.2, vol. 17, pp. 393–403 (August 1821); reprinted (with added section nos.) in Fresnel, 1866–70, vol. 1, pp. 601–608; translated as "Note on the remarks of Mr. Biot relating to colors of thin plates", / , 2021. A. Fresnel, 1821c, Letter to D.F.J.Arago, 21 September 1821, in Fresnel, 1866–70, vol. 2, pp. 257–259; translated as "Letter to Arago on biaxial birefringence", Wikisource, April 2021. A. Fresnel, 1822a, De la Lumière (On Light), in J. Riffault (ed.), Supplément à la traduction française de la cinquième édition du "Système de Chimie" par Th.Thomson, Paris: Chez Méquignon-Marvis, 1822, pp. 1–137,535–539; reprinted in Fresnel, 1866–70, vol. 2, pp. 3–146; translated by T. Young as "Elementary view of the undulatory theory of light", Quarterly Journal of Science, Literature, and Art, vol. 22 (Jan.–Jun.1827), pp. 127–141, 441–454; vol. 23 (Jul.–Dec.1827), pp. 113–35, 431–448; vol. 24 (Jan.–Jun.1828), pp. 198–215; vol. 25 (Jul.–Dec.1828), pp. 168–191, 389–407; vol. 26 (Jan.–Jun.1829), pp. 159–165. A. Fresnel, 1822b, "Mémoire sur un nouveau système d'éclairage des phares", read 29 July 1822; reprinted in Fresnel, 1866–70, vol. 3, pp. 97–126; translated by T. Tag as "Memoir upon a new system of lighthouse illumination", U.S. Lighthouse Society, accessed 26 August 2017; archived 19 August 2016. (Cited page numbers refer to the translation.) A. Fresnel, 1827, "Mémoire sur la double réfraction", Mémoires de l'Académie Royale des Sciences de l'Institut de France, vol. (for 1824, printed 1827), pp. 45–176; reprinted as "Second mémoire…" in Fresnel, 1866–70, vol. 2, pp. 479–596; translated by A.W. Hobson as "Memoir on double refraction", in Taylor, 1852, pp. 238–333. (Cited page numbers refer to the translation. For notable errata in the original edition, and consequently in the translation, see Fresnel, 1866–70, vol. 2, p. 596n.) A. Fresnel (ed. H. de Sénarmont, E. Verdet, and L. Fresnel), 1866–70, Oeuvres complètes d'Augustin Fresnel (3 volumes), Paris: Imprimerie Impériale; vol. 1 (1866), vol. 2 (1868), vol. 3 (1870). I. Grattan-Guinness, 1990, Convolutions in French Mathematics, 1800–1840, Basel: Birkhäuser, vol. 2, , chapter 13 (pp. 852–915, "The entry of Fresnel: Physical optics, 1815–1824") and chapter 15 (pp. 968–1045, "The entry of Navier and the triumph of Cauchy: Elasticity theory, 1819–1830"). C. Huygens, 1690, Traité de la Lumière (Leiden: Van der Aa), translated by S.P. Thompson as Treatise on Light, University of Chicago Press, 1912; Project Gutenberg, 2005. (Cited page numbers match the 1912 edition and the Gutenberg HTML edition.) F.A. Jenkins and H.E. White, 1976, Fundamentals of Optics, 4th Ed., New York: McGraw-Hill, . N. Kipnis, 1991, History of the Principle of Interference of Light, Basel: Birkhäuser, , chapters . K.A. Kneller (tr. T.M. Kettle), 1911, Christianity and the Leaders of Modern Science: A contribution to the history of culture in the nineteenth century, Freiburg im Breisgau: B. Herder, pp. 146–149. T.H. Levitt, 2009, The Shadow of Enlightenment: Optical and Political Transparency in France, 1789–1848, Oxford, . T.H. Levitt, 2013, A Short Bright Flash: Augustin Fresnel and the Birth of the Modern Lighthouse, New York: W.W. Norton, . H. Lloyd, 1834, "Report on the progress and present state of physical optics", Report of the Fourth Meeting of the British Association for the Advancement of Science (held at Edinburgh in 1834), London: J. Murray, 1835, pp. 295–413. E. Mach (tr. J.S. Anderson & A.F.A. Young), The Principles of Physical Optics: An Historical and Philosophical Treatment, London: Methuen & Co., 1926. I. Newton, 1730, Opticks: or, a Treatise of the Reflections, Refractions, Inflections, and Colours of Light, 4th Ed. (London: William Innys, 1730; Project Gutenberg, 2010); republished with Foreword by A. Einstein and Introduction by E.T. Whittaker (London: George Bell & Sons, 1931); reprinted with additional Preface by I.B. Cohen and Analytical Table of Contents by D.H.D. Roller, Mineola, NY: Dover, 1952, 1979 (with revised preface), 2012. (Cited page numbers match the Gutenberg HTML edition and the Dover editions.) R.H. Silliman, 1967, Augustin Fresnel (1788–1827) and the Establishment of the Wave Theory of Light (PhD dissertation, ), Princeton University, submitted 1967, accepted 1968; available from ProQuest (missing the first page of the preface). R.H. Silliman, 2008, "Fresnel, Augustin Jean", Complete Dictionary of Scientific Biography, Detroit: Charles Scribner's Sons, vol. 5, pp. 165–171. (The version at encyclopedia.com lacks the diagram and equations.) R. Taylor (ed.), 1852, Scientific Memoirs, selected from the Transactions of Foreign Academies of Science and Learned Societies, and from Foreign Journals (in English), vol. , London: Taylor & Francis. W. Whewell, 1857, History of the Inductive Sciences: From the Earliest to the Present Time, 3rd Ed., London: J.W. Parker & Son, vol. 2, book , chapters . E. T. Whittaker, 1910, A History of the Theories of Aether and Electricity: From the age of Descartes to the close of the nineteenth century, London: Longmans, Green, & Co., chapters . J. Worrall, 1989, "Fresnel, Poisson and the white spot: The role of successful predictions in the acceptance of scientific theories", in D. Gooding, T. Pinch, and S. Schaffer (eds.), The Uses of Experiment: Studies in the Natural Sciences, Cambridge University Press, , pp. 135–157. T. Young, 1807, A Course of Lectures on Natural Philosophy and the Mechanical Arts (2 volumes), London: J.Johnson; vol. 1, vol. 2. T. Young (ed. G. Peacock), 1855, Miscellaneous Works of the late Thomas Young, London: J. Murray, vol. 1. Further reading Some English translations of works by Fresnel are included in the above Bibliography. For a more comprehensive list, see "External links" below. The most detailed secondary source on Fresnel in English is apparently Buchwald 1989 —in which Fresnel, although not named in the title, is clearly the central character. On lighthouse lenses, this article heavily cites Levitt 2013, Elton 2009, and Thomas Tag at the U.S. Lighthouse Society (see "External links" below). All three authors deal not only with Fresnel's contributions but also with later innovations that are not mentioned here (see Fresnel lens: History). By comparison with the volume and impact of his scientific and technical writings, biographical information on Fresnel is remarkably scarce. There is no book-length critical biography of him, and anyone who proposes to write one must confront the fact that the letters published in his Oeuvres complètes—contrary to the title—are heavily redacted. In the words of Robert H. Silliman (1967, p. 6n): "By an unhappy judgment of the editors, dictated in part, one suspects, by political expediency, the letters appear in fragmentary form, preserving almost nothing beyond the technical discussions of Fresnel and his correspondents." It is not clear from the secondary sources whether the manuscripts of those letters are still extant (cf. Grattan-Guinness, 1990, p.854n). External links List of English translations of works by Augustin Fresnel at Zenodo. United States Lighthouse Society, especially "Fresnel Lenses". . . 1788 births 1827 deaths 19th-century deaths from tuberculosis 19th-century French physicists Burials at Père Lachaise Cemetery Corps des ponts École des Ponts ParisTech alumni École Polytechnique alumni Foreign Members of the Royal Society French civil engineers French humanitarians French Roman Catholics History of physics Tuberculosis deaths in France Jansenists Light Lighthouses Members of the French Academy of Sciences Optical physicists People from Eure Physical optics	14
An assembly line is a manufacturing process (often called a progressive assembly) in which parts (usually interchangeable parts) are added as the semi-finished assembly moves from workstation to workstation where the parts are added in sequence until the final assembly is produced. By mechanically moving the parts to the assembly work and moving the semi-finished assembly from work station to work station, a finished product can be assembled faster and with less labor than by having workers carry parts to a stationary piece for assembly. Assembly lines are common methods of assembling complex items such as automobiles and other transportation equipment, household appliances and electronic goods. Workers in charge of the works of assembly line are called assemblers. Concepts Assembly lines are designed for the sequential organization of workers, tools or machines, and parts. The motion of workers is minimized to the extent possible. All parts or assemblies are handled either by conveyors or motorized vehicles such as forklifts, or gravity, with no manual trucking. Heavy lifting is done by machines such as overhead cranes or forklifts. Each worker typically performs one simple operation unless job rotation strategies are applied. According to Henry Ford: Designing assembly lines is a well-established mathematical challenge, referred to as an assembly line balancing problem. In the simple assembly line balancing problem the aim is to assign a set of tasks that need to be performed on the workpiece to a sequence of workstations. Each task requires a given task duration for completion. The assignment of tasks to stations is typically limited by two constraints: (1) a precedence graph which indicates what other tasks need to be completed before a particular task can be initiated (e.g. not putting in a screw before drilling the hole) and (2) a cycle time which restricts the sum of task processing times which can be completed at each workstation before the work-piece is moved to the next station by the conveyor belt. Major planning problems for operating assembly lines include supply chain integration, inventory control and production scheduling. Simple example Consider the assembly of a car: assume that certain steps in the assembly line are to install the engine, install the hood, and install the wheels (in that order, with arbitrary interstitial steps); only one of these steps can be done at a time. In traditional production, only one car would be assembled at a time. If engine installation takes 20 minutes, hood installation takes five minutes, and wheels installation takes 10 minutes, then a car can be produced every 35 minutes. In an assembly line, car assembly is split between several stations, all working simultaneously. When a station is finished with a car, it passes it on to the next. By having three stations, three cars can be operated on at the same time, each at a different stage of assembly. After finishing its work on the first car, the engine installation crew can begin working on the second car. While the engine installation crew works on the second car, the first car can be moved to the hood station and fitted with a hood, then to the wheels station and be fitted with wheels. After the engine has been installed on the second car, the second car moves to the hood assembly. At the same time, the third car moves to the engine assembly. When the third car's engine has been mounted, it then can be moved to the hood station; meanwhile, subsequent cars (if any) can be moved to the engine installation station. Assuming no loss of time when moving a car from one station to another, the longest stage on the assembly line determines the throughput (20 minutes for the engine installation) so a car can be produced every 20 minutes, once the first car taking 35 minutes has been produced. History Before the Industrial Revolution, most manufactured products were made individually by hand. A single craftsman or team of craftsmen would create each part of a product. They would use their skills and tools such as files and knives to create the individual parts. They would then assemble them into the final product, making cut-and-try changes in the parts until they fit and could work together (craft production). Division of labor was practiced by Ancient Greeks, Chinese and other ancient civilizations. In Ancient Greece it was discussed by Plato and Xenophon. Adam Smith discussed the division of labour in the manufacture of pins at length in his book The Wealth of Nations (published in 1776). The Venetian Arsenal, dating to about 1104, operated similar to a production line. Ships moved down a canal and were fitted by the various shops they passed. At the peak of its efficiency in the early 16th century, the Arsenal employed some 16,000 people who could apparently produce nearly one ship each day and could fit out, arm, and provision a newly built galley with standardized parts on an assembly-line basis. Although the Arsenal lasted until the early Industrial Revolution, production line methods did not become common even then. Industrial Revolution The Industrial Revolution led to a proliferation of manufacturing and invention. Many industries, notably textiles, firearms, clocks and watches, horse-drawn vehicles, railway locomotives, sewing machines, and bicycles, saw expeditious improvement in materials handling, machining, and assembly during the 19th century, although modern concepts such as industrial engineering and logistics had not yet been named. The automatic flour mill built by Oliver Evans in 1785 was called the beginning of modern bulk material handling by Roe (1916). Evans's mill used a leather belt bucket elevator, screw conveyors, canvas belt conveyors, and other mechanical devices to completely automate the process of making flour. The innovation spread to other mills and breweries. Probably the earliest industrial example of a linear and continuous assembly process is the Portsmouth Block Mills, built between 1801 and 1803. Marc Isambard Brunel (father of Isambard Kingdom Brunel), with the help of Henry Maudslay and others, designed 22 types of machine tools to make the parts for the rigging blocks used by the Royal Navy. This factory was so successful that it remained in use until the 1960s, with the workshop still visible at HM Dockyard in Portsmouth, and still containing some of the original machinery. One of the earliest examples of an almost modern factory layout, designed for easy material handling, was the Bridgewater Foundry. The factory grounds were bordered by the Bridgewater Canal and the Liverpool and Manchester Railway. The buildings were arranged in a line with a railway for carrying the work going through the buildings. Cranes were used for lifting the heavy work, which sometimes weighed in the tens of tons. The work passed sequentially through to erection of framework and final assembly. The first flow assembly line was initiated at the factory of Richard Garrett & Sons, Leiston Works in Leiston in the English county of Suffolk for the manufacture of portable steam engines. The assembly line area was called 'The Long Shop' on account of its length and was fully operational by early 1853. The boiler was brought up from the foundry and put at the start of the line, and as it progressed through the building it would stop at various stages where new parts would be added. From the upper level, where other parts were made, the lighter parts would be lowered over a balcony and then fixed onto the machine on the ground level. When the machine reached the end of the shop, it would be completed. Interchangeable parts During the early 19th century, the development of machine tools such as the screw-cutting lathe, metal planer, and milling machine, and of toolpath control via jigs and fixtures, provided the prerequisites for the modern assembly line by making interchangeable parts a practical reality. Late 19th-century steam and electric conveyors Steam-powered conveyor lifts began being used for loading and unloading ships some time in the last quarter of the 19th century. Hounshell (1984) shows a sketch of an electric-powered conveyor moving cans through a filling line in a canning factory. The meatpacking industry of Chicago is believed to be one of the first industrial assembly lines (or disassembly lines) to be utilized in the United States starting in 1867. Workers would stand at fixed stations and a pulley system would bring the meat to each worker and they would complete one task. Henry Ford and others have written about the influence of this slaughterhouse practice on the later developments at Ford Motor Company. 20th century According to Domm, the implementation of mass production of an automobile via an assembly line may be credited to Ransom Olds, who used it to build the first mass-produced automobile, the Oldsmobile Curved Dash. Olds patented the assembly line concept, which he put to work in his Olds Motor Vehicle Company factory in 1901. At Ford Motor Company, the assembly line was introduced by William "Pa" Klann upon his return from visiting Swift & Company's slaughterhouse in Chicago and viewing what was referred to as the "disassembly line", where carcasses were butchered as they moved along a conveyor. The efficiency of one person removing the same piece over and over without moving to another station caught his attention. He reported the idea to Peter E. Martin, soon to be head of Ford production, who was doubtful at the time but encouraged him to proceed. Others at Ford have claimed to have put the idea forth to Henry Ford, but Pa Klann's slaughterhouse revelation is well documented in the archives at the Henry Ford Museum and elsewhere, making him an important contributor to the modern automated assembly line concept. Ford was appreciative, having visited the highly automated 40-acre Sears mail order handling facility around 1906. At Ford, the process was an evolution by trial and error of a team consisting primarily of Peter E. Martin, the factory superintendent; Charles E. Sorensen, Martin's assistant; Clarence W. Avery; C. Harold Wills, draftsman and toolmaker; Charles Ebender; and József Galamb. Some of the groundwork for such development had recently been laid by the intelligent layout of machine tool placement that Walter Flanders had been doing at Ford up to 1908. The moving assembly line was developed for the Ford Model T and began operation on October 7, 1913, at the Highland Park Ford Plant, and continued to evolve after that, using time and motion study. The assembly line, driven by conveyor belts, reduced production time for a Model T to just 93 minutes by dividing the process into 45 steps. Producing cars quicker than paint of the day could dry, it had an immense influence on the world. In 1922, Ford (through his ghostwriter Crowther) said of his 1913 assembly line: Charles E. Sorensen, in his 1956 memoir My Forty Years with Ford, presented a different version of development that was not so much about individual "inventors" as a gradual, logical development of industrial engineering: As a result of these developments in method, Ford's cars came off the line in three-minute intervals or six feet per minute. This was much faster than previous methods, increasing production by eight to one (requiring 12.5 man-hours before, 1 hour 33 minutes after), while using less manpower. It was so successful, paint became a bottleneck. Only japan black would dry fast enough, forcing the company to drop the variety of colours available before 1914, until fast-drying Duco lacquer was developed in 1926. The assembly line technique was an integral part of the diffusion of the automobile into American society. Decreased costs of production allowed the cost of the Model T to fall within the budget of the American middle class. In 1908, the price of a Model T was around $825, and by 1912 it had decreased to around $575. This price reduction is comparable to a reduction from $15,000 to $10,000 in dollar terms from the year 2000. In 1914, an assembly line worker could buy a Model T with four months' pay. Ford's complex safety procedures—especially assigning each worker to a specific location instead of allowing them to roam about—dramatically reduced the rate of injury. The combination of high wages and high efficiency is called "Fordism", and was copied by most major industries. The efficiency gains from the assembly line also coincided with the take-off of the United States. The assembly line forced workers to work at a certain pace with very repetitive motions which led to more output per worker while other countries were using less productive methods. In the automotive industry, its success was dominating, and quickly spread worldwide. Ford France and Ford Britain in 1911, Ford Denmark 1923, Ford Germany and Ford Japan 1925; in 1919, Vulcan (Southport, Lancashire) was the first native European manufacturer to adopt it. Soon, companies had to have assembly lines, or risk going broke by not being able to compete; by 1930, 250 companies which did not had disappeared. The massive demand for military hardware in World War II prompted assembly-line techniques in shipbuilding and aircraft production. Thousands of Liberty ships were built making extensive use of prefabrication, enabling ship assembly to be completed in weeks or even days. After having produced fewer than 3,000 planes for the United States Military in 1939, American aircraft manufacturers built over 300,000 planes in World War II. Vultee pioneered the use of the powered assembly line for aircraft manufacturing. Other companies quickly followed. As William S. Knudsen (having worked at Ford, GM and the National Defense Advisory Commission) observed, "We won because we smothered the enemy in an avalanche of production, the like of which he had never seen, nor dreamed possible." Improved working conditions In his 1922 autobiography, Henry Ford mentions several benefits of the assembly line including: Workers do not do any heavy lifting. No stooping or bending over. No special training was required. There are jobs that almost anyone can do. Provided employment to immigrants. The gains in productivity allowed Ford to increase worker pay from $1.50 per day to $5.00 per day once employees reached three years of service on the assembly line. Ford continued on to reduce the hourly work week while continuously lowering the Model T price. These goals appear altruistic; however, it has been argued that they were implemented by Ford in order to reduce high employee turnover: when the assembly line was introduced in 1913, it was discovered that "every time the company wanted to add 100 men to its factory personnel, it was necessary to hire 963" in order to counteract the natural distaste the assembly line seems to have inspired. Sociological problems Sociological work has explored the social alienation and boredom that many workers feel because of the repetition of doing the same specialized task all day long. Karl Marx expressed in his theory of alienation the belief that, in order to achieve job satisfaction, workers need to see themselves in the objects they have created, that products should be "mirrors in which workers see their reflected essential nature". Marx viewed labour as a chance for people to externalize facets of their personalities. Marxists argue that performing repetitive, specialized tasks causes a feeling of disconnection between what a worker does all day, who they really are, and what they would ideally be able to contribute to society. Furthermore, Marx views these specialised jobs as insecure, since the worker is expendable as soon as costs rise and technology can replace more expensive human labour. Since workers have to stand in the same place for hours and repeat the same motion hundreds of times per day, repetitive stress injuries are a possible pathology of occupational safety. Industrial noise also proved dangerous. When it was not too high, workers were often prohibited from talking. Charles Piaget, a skilled worker at the LIP factory, recalled that besides being prohibited from speaking, the semi-skilled workers had only 25 centimeters in which to move. Industrial ergonomics later tried to minimize physical trauma. See also Modern Times, a 1936 film featuring the Tramp character (played by Charlie Chaplin) struggling to adapt to assembly line work Final Offer, a documentary film about the 1984 UAW/CAW contract negotiations shows working life on the floor of the GM Oshawa Ontario Car Assembly Plant (Watch Online) Reconfigurable and flexible manufacturing systems, involving Post-Fordism and lean manufacturing-influenced production References Footnotes Works cited External links Homepage for assembly line optimization research Assembly line optimization problems History of the assembly line and its widespread effects Cars Assembly Line Industrial processes Mass production Manufacturing buildings and structures American inventions Culture of Detroit History of science and technology in the United States Articles containing video clips Types of production ca:Producció en cadena	23
Adelaide ( ; ) is the capital city of South Australia, the state's largest city and the fifth-most populous city in Australia. "Adelaide" may refer to either Greater Adelaide (including the Adelaide Hills) or the Adelaide city centre. The demonym Adelaidean is used to denote the city and the residents of Adelaide. The Traditional Owners of the Adelaide region are the Kaurna. The area of the city centre and surrounding Park Lands is called in the Kaurna language. Adelaide is situated on the Adelaide Plains north of the Fleurieu Peninsula, between the Gulf St Vincent in the west and the Mount Lofty Ranges in the east. Its metropolitan area extends from the coast to the foothills of the Mount Lofty Ranges, and stretches from Gawler in the north to Sellicks Beach in the south. Named in honour of Adelaide of Saxe-Meiningen, queen of King William IV, the city was founded in 1836 as the planned capital for the only freely-settled British province in Australia. Colonel William Light, one of Adelaide's founding fathers, designed the city centre and chose its location close to the River Torrens. Light's design, now listed as national heritage, set out the city centre in a grid layout known as "Light's Vision", interspaced by wide boulevards and large public squares, and entirely surrounded by park lands. Early colonial Adelaide was shaped by the diversity and wealth of its free settlers, in contrast to the convict history of other Australian cities. It was Australia's third most populated city until the post-war era. It has been noted for its leading examples of religious freedom and progressive political reforms, and became known as the "City of Churches" due to its diversity of faiths. Today, Adelaide is known by its many festivals and sporting events, its food and wine, its coastline and hills, its large defence and manufacturing sectors and its emerging space sector, including the Australian Space Agency being headquartered here. Adelaide's quality of life has ranked consistently highly in various measures through the 21st century, at one stage being named Australia's most liveable city. As South Australia's government and commercial centre, Adelaide is the site of many governmental and financial institutions. Most of these are concentrated in the city centre along the cultural boulevards of North Terrace and King William Street. History Before European settlement The area around modern-day Adelaide was originally inhabited by the Indigenous Kaurna people, one of many Aboriginal nations in South Australia. The city and parklands area was known as Tarntanya, Tandanya, now the short name of Tandanya National Aboriginal Cultural Institute, Tarndanya, or Tarndanyangga, now the dual name for Victoria Square, in the Kaurna language. The name means 'male red kangaroo rock', referring to a rock formation on the site that has now been destroyed. The surrounding area was an open grassy plain with patches of trees and shrubs which had been managed by hundreds of generations. Kaurna country encompassed the plains which stretched north and south of Tarntanya as well as the wooded foothills of the Mt Lofty Ranges. The River Torrens was known as the Karrawirra Pari (Red Gum forest river). About 300 Kaurna populated the Adelaide area, and were referred to by the settlers as the Cowandilla. There were more than 20 local clans across the plain who lived semi-nomadic lives, with extensive mound settlements where huts were built repeatedly over centuries and a complex social structure including a class of sorcerers separated from regular society. Within a few decades of European settlement of South Australia, Kaurna culture was almost completely destroyed. The last speaker of Kaurna language died in 1929. Extensive documentation by early missionaries and other researchers has enabled a modern revival of both, which has included a commitment by local and state governments to rename or include Kaurna names for many local places. 19th century Based on the ideas of Edward Gibbon Wakefield about colonial reform, Robert Gouger petitioned the British government to create a new colony in Australia, resulting in the passage of the South Australia Act 1834. Physical establishment of the colony began with the arrival of the first British colonisers in February 1836. The first governor proclaimed the commencement of colonial government in South Australia on 28 December 1836, near The Old Gum Tree in what is now the suburb of Glenelg North. The event is commemorated in South Australia as Proclamation Day. The site of the colony's capital was surveyed and laid out by Colonel William Light, the first surveyor-general of South Australia, with his own original, unique, topographically sensitive design. The city was named after Queen Adelaide. Adelaide was established as a planned colony of free immigrants, promising civil liberties and freedom from religious persecution, based upon the ideas of Edward Gibbon Wakefield. Wakefield had read accounts of Australian settlement while in prison in London for attempting to abduct an heiress, and realised that the eastern colonies suffered from a lack of available labour, due to the practice of giving land grants to all arrivals. Wakefield's idea was for the Government to survey and sell the land at a rate that would maintain land values high enough to be unaffordable for labourers and journeymen. Funds raised from the sale of land were to be used to bring out working-class emigrants, who would have to work hard for the monied settlers to ever afford their own land. As a result of this policy, Adelaide does not share the convict settlement history of other Australian cities like Sydney, Brisbane and Hobart. As it was believed that in a colony of free settlers there would be little crime, no provision was made for a gaol in Colonel Light's 1837 plan. But by mid-1837 the South Australian Register was warning of escaped convicts from New South Wales and tenders for a temporary gaol were sought. Following a burglary, a murder, and two attempted murders in Adelaide during March 1838, Governor Hindmarsh created the South Australian Police Force (now the South Australia Police) in April 1838 under 21-year-old Henry Inman. The first sheriff, Samuel Smart, was wounded during a robbery, and on 2 May 1838 one of the offenders, Michael Magee, became the first person to be hanged in South Australia. William Baker Ashton was appointed governor of the temporary gaol in 1839, and in 1840 George Strickland Kingston was commissioned to design Adelaide's new gaol. Construction of Adelaide Gaol commenced in 1841. Adelaide's early history was marked by economic uncertainty and questionable leadership. The first governor of South Australia, John Hindmarsh, clashed frequently with others, in particular the Resident Commissioner, James Hurtle Fisher. The rural area surrounding Adelaide was surveyed by Light in preparation to sell a total of over of land. Adelaide's early economy started to get on its feet in 1838 with the arrival of livestock from Victoria, New South Wales and Tasmania. Wool production provided an early basis for the South Australian economy. By 1860, wheat farms had been established from Encounter Bay in the south to Clare in the north. George Gawler took over from Hindmarsh in late 1838 and, despite being under orders from the Select Committee on South Australia in Britain not to undertake any public works, promptly oversaw construction of a governor's house, the Adelaide Gaol, police barracks, a hospital, a customs house and a wharf at Port Adelaide. Gawler was recalled and replaced by George Edward Grey in 1841. Grey slashed public expenditure against heavy opposition, although its impact was negligible at this point: silver was discovered in Glen Osmond that year, agriculture was well underway, and other mines sprung up all over the state, aiding Adelaide's commercial development. The city exported meat, wool, wine, fruit and wheat by the time Grey left in 1845, contrasting with a low point in 1842 when one-third of Adelaide houses were abandoned. Trade links with the rest of the Australian states were established after the Murray River was successfully navigated in 1853 by Francis Cadell, an Adelaide resident. South Australia became a self-governing colony in 1856 with the ratification of a new constitution by the British parliament. Secret ballots were introduced, and a bicameral parliament was elected on 9 March 1857, by which time 109,917 people lived in the province. In 1860, the Thorndon Park reservoir was opened, providing an alternative water source to the now turbid River Torrens. Gas street lighting was implemented in 1867, the University of Adelaide was founded in 1874, the South Australian Art Gallery opened in 1881 and the Happy Valley Reservoir opened in 1896. In the 1890s Australia was affected by a severe economic depression, ending a hectic era of land booms and tumultuous expansionism. Financial institutions in Melbourne and banks in Sydney closed. The national fertility rate fell and immigration was reduced to a trickle. The value of South Australia's exports nearly halved. Drought and poor harvests from 1884 compounded the problems, with some families leaving for Western Australia. Adelaide was not as badly hit as the larger gold-rush cities of Sydney and Melbourne, and silver and lead discoveries at Broken Hill provided some relief. Only one year of deficit was recorded, but the price paid was retrenchments and lean public spending. Wine and copper were the only industries not to suffer a downturn. 20th century Adelaide was Australia's third largest city for most of the 20th century. Electric street lighting was introduced in 1900 and electric trams were transporting passengers in 1909. 28,000 men were sent to fight in World War I. Historian F. W. Crowley examined the reports of visitors in the early 20th century, noting that "many visitors to Adelaide admired the foresighted planning of its founders", as well as pondering the riches of the young city. Adelaide enjoyed a postwar boom, entering a time of relative prosperity. Its population grew, and it became the third most populous metropolitan area in the country, after Sydney and Melbourne. Its prosperity was short-lived, with the return of droughts and the Great Depression of the 1930s. It later returned to fortune under strong government leadership. Secondary industries helped reduce the state's dependence on primary industries. World War II brought industrial stimulus and diversification to Adelaide under the Playford Government, which advocated Adelaide as a safe place for manufacturing due to its less vulnerable location. Shipbuilding was expanded at the nearby port of Whyalla. The South Australian Government in this period built on former wartime manufacturing industries but neglected cultural facilities which meant South Australia's economy lagged behind. International manufacturers like General Motors Holden and Chrysler made use of these factories around the Adelaide area in suburbs like Elizabeth, completing its transformation from an agricultural service centre to a 20th-century motor city. The Mannum–Adelaide pipeline brought River Murray water to Adelaide in 1955 and an airport opened at West Beach in 1955. Flinders University and the Flinders Medical Centre were established in the 1960s at Bedford Park, south of the city. Today, Flinders Medical Centre is one of the largest teaching hospitals in South Australia. In the post-war years around the early 1960s, Adelaide was surpassed by Brisbane as Australia's third largest city. The Dunstan Governments of the 1970s saw something of an Adelaide 'cultural revival', establishing a wide array of social reforms. The city became noted for its progressivism as South Australia became the first Australian state or territory to decriminalise homosexuality between consenting adults in 1975. Adelaide became a centre for the arts, building upon the biennial "Adelaide Festival of Arts" that commenced in 1960. The State Bank collapsed in 1991 during an economic recession. The effects lasted until 2004, when Standard & Poor's reinstated South Australia's AAA credit rating. Adelaide's tallest building, completed in 2020, is called the Adelaidean and is located at 11 Frome Street. 21st century In the early years of the 21st century, a significant increase in the state government's spending on Adelaide's infrastructure occurred. The Rann government invested A$535 million in a major upgrade of the Adelaide Oval to enable Australian Football League to be played in the city centre and more than A$2 billion to build a new Royal Adelaide Hospital on land adjacent to the Adelaide Railway Station. The Glenelg tramline was extended through the city to Hindmarsh down to East Terrace and the suburban railway line extended south to Seaford. Following a period of stagnation in the 1990s and 2000s, Adelaide began several major developments and redevelopments. The Adelaide Convention Centre was redeveloped and expanded at a cost of A$350 million beginning in 2012. Three historic buildings were adapted for modern use: the Torrens Building in Victoria Square as the Adelaide campus for Carnegie Mellon University, University College London, and Torrens University; the Stock Exchange building as the Science Exchange of the Royal Institution Australia; and the Glenside Psychiatric Hospital as the Adelaide Studios of the SA Film Corporation. The government invested more than A$2 billion to build a desalination plant, powered by renewable energy, as an 'insurance policy' against droughts affecting Adelaide's water supply. The Adelaide Festival, Fringe, and Womadelaide became annual events. Geography Adelaide is north of the Fleurieu Peninsula, on the Adelaide Plains between the Gulf St Vincent and the low-lying Mount Lofty Ranges. The city stretches from the coast to the foothills, and from Gawler at its northern extent to Sellicks Beach in the south. According to the Regional Development Australia, an Australian government planning initiative, the "Adelaide Metropolitan Region" has a total land area of , while a more expansive definition by the Australian Bureau of Statistics defines a "Greater Adelaide" statistical area totalling . The city sits at an average elevation of above sea level. Mount Lofty, east of the Adelaide metropolitan region in the Adelaide Hills at an elevation of , is the tallest point of the city and in the state south of Burra. The city borders the Temperate Grassland of South Australia in the east, an endangered vegetation community. Much of Adelaide was bushland before British settlement, with some variation – sandhills, swamps and marshlands were prevalent around the coast. The loss of the sandhills to urban development had a particularly destructive effect on the coastline due to erosion. Where practical, the government has implemented programs to rebuild and vegetate sandhills at several of Adelaide's beachside suburbs. Tennyson Dunes is the largest contiguous, tertiary dune system contained entirely within Metropolitan Adelaide, providing refuge for a variety of remnant species formerly found along the entire coastline. Much of the original vegetation has been cleared with what is left to be found in reserves such as the Cleland National Park and Belair National Park. A number of creeks and rivers flow through the Adelaide region. The largest are the Torrens and Onkaparinga catchments. Adelaide relies on its many reservoirs for water supply with the Happy Valley Reservoir supplying around 40% and the much larger Mount Bold Reservoir 10% of Adelaide's domestic requirements respectively. Geology Adelaide and its surrounding area is one of the most seismically active regions in Australia. On 1 March 1954 at 3:40 am Adelaide experienced its largest recorded earthquake to date, with the epicentre 12 km from the city centre at Darlington, and a reported magnitude of 5.6. There have been smaller earthquakes in 2010, 2011, 2014, 2017, 2018 and 2022. The uplands of the Adelaide Hills, part of the southern Mount Lofty Ranges to the east of Adelaide, are defined on their western side by a number of arcuate faults (the Para, Eden, Clarendon and Willunga Faults), and consist of rocks such as siltstone, dolomite and quartzite, dating from the Neoproterozoic to the middle Cambrian, laid down in the Adelaide Rift Complex, the oldest part of the Adelaide Superbasin. Most of the Adelaide metropolitan area lies in the downthrown St Vincent Basin and its embayments, including the Adelaide Plains Sub-basin, and the Golden Grove, Noarlunga and Willunga Embayments. These basins contain deposits of Tertiary marine and non-marine sands and limestones, which form important aquifers. These deposits are overlain by Quaternary alluvial fans and piedmont slope deposits, derived from erosion of the uplands, consisting of sands, clays and gravels, interfingering to the west with transgressive Pleistocene to Holocene marine sands and coastal sediments of the shoreline of Gulf St Vincent. Urban layout Adelaide is a planned city, designed by the first Surveyor-General of South Australia, Colonel William Light. His plan, sometimes referred to as "Light's Vision" (also the name of a statue of him on Montefiore Hill), arranged Adelaide in a grid, with five squares in the Adelaide city centre and a ring of parks, known as the Adelaide Parklands, surrounding it. Light's selection of the location for the city was initially unpopular with the early settlers, as well as South Australia's first governor, John Hindmarsh, due to its distance from the harbour at Port Adelaide, and the lack of fresh water there. Light successfully persisted with his choice of location against this initial opposition. Recent evidence suggests that Light worked closely with George Kingston as well as a team of men to set out Adelaide, using various templates for city plans going back to Ancient Greece, including Italian Renaissance designs and the similar layouts of the American cities Philadelphia and Savannah–which, like Adelaide, follow the same layout of a central city square, four complementing city squares surrounding it and a parklands area that surrounds the city centre. The benefits of Light's design are numerous: Adelaide has had wide multi-lane roads from its beginning, an easily navigable cardinal direction grid layout and an expansive green ring around the city centre. There are two sets of ring roads in Adelaide that have resulted from the original design. The inner ring route (A21) borders the parklands, and the outer route (A3/A13/A16/A17) completely bypasses the inner city via (in clockwise order) Grand Junction Road, Hampstead Road, Ascot Avenue, Portrush Road, Cross Road and South Road. Suburban expansion has to some extent outgrown Light's original plan. Numerous former outlying villages and "country towns", as well as the satellite city of Elizabeth, have been enveloped by its suburban sprawl. Expanding developments in the Adelaide Hills region led to the construction of the South Eastern Freeway to cope with growth, which has subsequently led to new developments and further improvements to that transport corridor. Similarly, the booming development in Adelaide's South led to the construction of the Southern Expressway. New roads are not the only transport infrastructure developed to cope with the urban growth. The O-Bahn Busway is an example of a unique solution to Tea Tree Gully's transport woes in the 1980s. The development of the nearby suburb of Golden Grove in the late 1980s is an example of well-thought-out urban planning. In the 1960s, a Metropolitan Adelaide Transport Study Plan was proposed to cater for the future growth of the city. The plan involved the construction of freeways, expressways and the upgrade of certain aspects of the public transport system. The then premier Steele Hall approved many parts of the plan and the government went as far as purchasing land for the project. The later Labor government elected under Don Dunstan shelved the plan, but allowed the purchased land to remain vacant, should the future need for freeways arise. In 1980, the Liberal party won government and premier David Tonkin committed his government to selling off the land acquired for the MATS plan, ensuring that even when needs changed, the construction of most MATS-proposed freeways would be impractical. Some parts of this land have been used for transport, (e.g. the O-Bahn Busway and Southern Expressway), while most has been progressively subdivided for residential use. In 2008, the SA Government announced plans for a network of transport-oriented developments across the Adelaide metropolitan area and purchased a 10 hectare industrial site at Bowden for $52.5 million as the first of these developments. Housing Historically, Adelaide's suburban residential areas have been characterised by single-storey detached houses built on blocks. A relative lack of suitable, locally-available timber for construction purposes led to the early development of a brick-making industry, as well as the use of stone, for houses and other buildings. By 1891, 68% of houses were built of stone, 15% of timber, and 10% of brick, with brick also being widely used in stone houses for quoins, door and window surrounds, and chimneys and fireplaces. There is a wide variety in the styles of these houses. Until the 1960s, most of the more substantial houses were built of red brick, though many front walls were of ornamental stone. Then cream bricks became fashionable, and in the 1970s, deep red and brown bricks became popular. Until the 1970s, roofs tended to be clad with (painted) corrugated iron or cement or clay tiles, usually red "terracotta". Since then, Colorbond corrugated steel has dominated. Most roofs are pitched. Flat roofs are not common. Up to the 1970s, most houses were of "double brick" construction on concrete footings, with timber floors laid on joists supported by "dwarf walls". Later houses have mainly been of "brick veneer" construction – structural timber or, more recently, lightweight steel frame on a concrete slab foundation, lined with Gyprock, and with an outer skin of brickwork, to cope with Adelaide's reactive soils, particularly Keswick Clay, black earth and some red-brown earth soils. The use of precast concrete panels for floor and wall construction has also increased. In addition to this, a significant factor in Adelaide's suburban history is the role of the South Australian Housing Trust. Climate Adelaide has a hot-summer Mediterranean climate (Csa) under the Köppen climate classification. The city has hot, dry summers and cool winters with moderate rainfall. Most precipitation falls in the winter months, leading to the suggestion that the climate be classified as a "cold monsoon". Rainfall is unreliable, light and infrequent throughout summer, although heavy falls can occur. The winter has fairly reliable rainfall with June being the wettest month of the year, averaging around 80 mm. Frosts are occasional, with the most notable occurrences in 1908 and 1982. Hail is common in winter. Adelaide is a windy city with significant wind chill in winter, which makes the temperature seem colder than it actually is. Snowfall in the metropolitan area is extremely rare, although light and sporadic falls in the nearby hills and at Mount Lofty occur during winter. Dewpoints in the summer typically range from . There are usually several days in summer where the temperature reaches or above; the frequency of these temperatures has been increasing in recent years. Temperature extremes range from -0.4 °C (31.4 °F), 8 June 1982 to 47.7 °C (117.9 °F), 24 January 2019. The city features 90.6 clear days annually. The average sea temperature ranges from in August to in February. Liveability Adelaide was consistently ranked in the world's 10 most liveable cities through the 2010s by The Economist Intelligence Unit. In June 2021, The Economist ranked Adelaide the third most liveable city in the world, behind Auckland and Osaka. In June 2023, Adelaide was ranked the twelfth most liveable city in the world by the Economist Intelligence Unit. In December 2021, Adelaide was named the world's second National Park City, after the state government had lobbied for this title. It was ranked the most liveable city in Australia by the Property Council of Australia, based on surveys of residents' views of their own city, between 2010 and 2013, dropping to second place in 2014. Governance Adelaide, as the capital of South Australia, is the seat of the Government of South Australia. The bicameral Parliament of South Australia consists of the lower house known as the House of Assembly and the upper house known as the Legislative Council. General elections are held every four years, the last being the 2022 South Australian state election. As Adelaide is South Australia's capital and most populous city, the State Government co-operates extensively with the City of Adelaide. In 2006, the Ministry for the City of Adelaide was created to facilitate the State Government's collaboration with the Adelaide City Council and the Lord Mayor to improve Adelaide's image. The State Parliament's Capital City Committee is also involved in the governance of the City of Adelaide, being primarily concerned with the planning of Adelaide's urban development and growth. Reflecting South Australia's status as Australia's most centralised state, Adelaide elects a substantial majority of the South Australian House of Assembly. Of the 47 seats in the chamber, 34 seats (three-quarters of the legislature) are based in Adelaide, and two rural seats include Adelaide suburbs. Local governments The Adelaide metropolitan area is divided between nineteen local government areas. At its centre, the City of Adelaide administers the Adelaide city centre, North Adelaide, and the surrounding Adelaide Parklands. It is the oldest municipal authority in Australia and was established in 1840, when Adelaide and Australia's first mayor, James Hurtle Fisher, was elected. From 1919 onwards, the city has had a Lord Mayor, the current being Lord Mayor The Right Honourable Jane Lomax-Smith. Demography Adelaide's inhabitants are known as Adelaideans. Compared with Australia's other state capitals, Adelaide is growing at a rate similar to Sydney, Canberra, and Hobart (see List of cities in Australia by population). In 2020, it had a metropolitan population (including suburbs) of more than 1,376,601, making it Australia's fifth-largest city. Some 77% of the population of South Australia are residents of the Adelaide metropolitan area, making South Australia one of the most centralised states. Major areas of population growth in recent years have been in outer suburbs such as Mawson Lakes and Golden Grove. Adelaide's inhabitants occupy 366,912 houses, 57,695 semi-detached, row terrace or town houses and 49,413 flats, units or apartments. About one sixth (17.1%) of the population had university qualifications. The number of Adelaideans with vocational qualifications (such as tradespersons) fell from 62.1% of the labour force in the 1991 census to 52.4% in the 2001 census. Adelaide is ageing more rapidly than other Australian capital cities. More than a quarter (27.5%) of Adelaide's population is aged 55 years or older, in comparison to the national average of 25.6%. Adelaide has the lowest number of children (under-15-year-olds), who comprised 17.7% of the population, compared to the national average of 19.3%. Ancestry and immigration At the 2021 census, the most commonly nominated ancestries were: Overseas-born Adelaideans composed 31.3% of the total population at the 2021 census. The five largest groups of overseas-born were from England (5.7%), India (3.1%), Mainland China (1.8%), Vietnam (1.2%) and Italy (1.1%). Suburbs including Newton, Payneham and Campbelltown in the east and Torrensville, West Lakes and Fulham to the west, have large Greek and Italian communities. The Italian consulate is located in the western suburb of Hindmarsh. Large Vietnamese populations are settled in the north-western suburbs of Woodville, Kilkenny, Pennington, Mansfield Park and Athol Park and also Parafield Gardens and Pooraka in Adelaide's north. Migrants from India and Sri Lanka have settled into inner suburban areas of Adelaide including the inner northern suburbs of Blair Athol, Kilburn and Enfield and the inner southern suburbs of Plympton, Park Holme and Kurralta Park. Suburbs such as Para Hills, Salisbury, Ingle Farm and Blair Athol in the north and Findon, West Croydon and Seaton and other Western suburbs have sizeable Afghan communities. Chinese migrants favour settling in the eastern and north eastern suburbs including Kensington Gardens, Greenacres, Modbury and Golden Grove. Mawson Lakes has a large international student population, due to its proximity to the University of South Australia campus. At the 2021 census, 1.7% of Adelaide's population identified as being Indigenous — Aboriginal Australians and Torres Strait Islanders. Language At the 2016 census, 75.4% of the population spoke English at home. The other languages most commonly spoken at home were Italian (2.1%), Standard Mandarin (2.1%), Greek (1.7%) Vietnamese (1.4%), and Cantonese (0.7%). The Kaurna language, spoken by the area's original inhabitants, had no living speakers in the middle of the 20th century, but since the 1990s there has been a sustained revival effort from academics and Kaurna elders. Religion Adelaide was founded on a vision of religious tolerance that attracted a wide variety of religious practitioners. This led to it being known as The City of Churches. But approximately 28% of the population expressed no religious affiliation in the 2011 Census, compared with the national average of 22.3%, making Adelaide one of Australia's least religious cities. Over half of the population of Adelaide identifies as Christian, with the largest denominations being Catholic (21.3%), Anglican (12.6%), Uniting Church (7.6%) and Eastern Orthodox (3.5%). The Jewish community of the city dates back to 1840. Eight years later, 58 Jews lived in the city. A synagogue was built in 1871, when 435 Jews lived in the city. Many took part in the city councils, such as Judah Moss Solomon (1852–66). Three Jews have been elected to the position of city mayor. In 1968, the Jewish population of Adelaide numbered about 1,200; in 2001, according to the Australian census, 979 persons declared themselves to be Jewish by religion. In 2011, over 1,000 Jews were living in the city, operating an Orthodox and a Reform school, in addition to a virtual Jewish museum. The "Afghan" community in Australia first became established in the 1860s when camels and their Pathan, Punjabi, Baluchi and Sindhi handlers began to be used to open up settlement in the continent's arid interior. Until eventually superseded by the advent of the railways and motor vehicles, camels played an invaluable economic and social role in transporting heavy loads of goods to and from isolated settlements and mines. This is acknowledged by the name of The Ghan, the passenger train operating between Adelaide, Alice Springs, and Darwin. The Central Adelaide Mosque is regarded as Australia's oldest permanent mosque; an earlier mosque at Marree in northern South Australia, dating from 1861 to 1862 and subsequently abandoned or demolished, has now been rebuilt. Economy South Australia's largest employment sectors are health care and social assistance, surpassing manufacturing in SA as the largest employer since 2006–07. In 2009–10, manufacturing in SA had average annual employment of 83,700 persons compared with 103,300 for health care and social assistance. Health care and social assistance represented nearly 13% of the state average annual employment. The Adelaide Hills wine region is an iconic and viable economic region for both the state and country in terms of wine production and sale. The 2014 vintage is reported as consisting of red grapes crushed valued at A$8,196,142 and white grapes crushed valued at $14,777,631. The retail trade is the second largest employer in SA (2009–10), with 91,900 jobs, and 12 per cent of the state workforce. Manufacturing, defence technology, high-tech electronic systems and research, commodity export and corresponding service industries all play a role in the SA economy. Almost half of all cars produced in Australia were made in Adelaide at the General Motors Holden plant in Elizabeth. The site ceased operating in November 2017. The collapse of the State Bank in 1992 resulted in large levels of state public debt (as much as A$4 billion). The collapse meant that successive governments enacted lean budgets, cutting spending, which was a setback to the further economic development of the city and state. The debt has more recently been reduced with the State Government once again receiving a AAA+ Credit Rating. The global media conglomerate News Corporation was founded in, and until 2004 incorporated in, Adelaide and it is still considered its "spiritual" home by its founder, Rupert Murdoch. Australia's largest oil company, Santos, prominent South Australian brewery, Coopers, and national retailer Harris Scarfe also call Adelaide their home. In 2018, at which time more than 80 organisations employed 800 people in the space sector in South Australia, Adelaide was chosen for the headquarters of a new Australian Space Agency. The agency opened its in 2020. It is working to triple the size of the Australian space industry and create 20,000 new jobs by 2030. Defence industry Adelaide is home to a large proportion of Australia's defence industries, which contribute over A$1 billion to South Australia's Gross State Product. The principal government military research institution, the Defence Science and Technology Organisation, and other defence technology organisations such as BAE Systems Australia and Lockheed Martin Australia, are north of Salisbury and west of Elizabeth in an area now called "Edinburgh Parks", adjacent to RAAF Base Edinburgh. Others, such as Saab Systems and Raytheon, are in or near Technology Park. ASC Pty Ltd, is based in the industrial suburb of Osborne and is also a part of Technology Park. South Australia was charged with constructing Australia's s and more recently the A$6 billion contract to construct the Royal Australian Navy's new air-warfare destroyers. Employment statistics , Greater Adelaide had an unemployment rate of 7.4% with a youth unemployment rate of 15%. The median weekly individual income for people aged 15 years and over was $447 per week in 2006, compared with $466 nationally. The median family income was $1,137 per week, compared with $1,171 nationally. Adelaide's housing and living costs are substantially lower than that of other Australian cities, with housing being notably cheaper. The median Adelaide house price is half that of Sydney and two-thirds that of Melbourne. The three-month trend unemployment rate to March 2007 was 6.2%. The Northern suburbs' unemployment rate is disproportionately higher than the other regions of Adelaide at 8.3%, while the East and South are lower than the Adelaide average at 4.9% and 5.0% respectively. House prices Over the decade March 2001 – March 2010, Metropolitan Adelaide median house prices approximately tripled. (approx. 285% – approx. 11%p.a. compounding) In the five years March 2007 – March 2012, prices increased by approx. 27% – approx. 5%p.a. compounding. March 2012 – March 2017 saw a further increase of 19% – approx. 3.5%p.a. compounding. In summary: Each quarter, The Alternative and Direct Investment Securities Association (ADISA) publishes a list of median house sale prices by suburb and Local Government Area. (Previously, this was done by REISA) Due to the small sizes of many of Adelaide's suburbs, the low volumes of sales in these suburbs, and (over time) the huge variations in the numbers of sales in a suburb in a quarter, statistical analysis of "the most expensive suburb" is unreliable; the suburbs appearing in the "top 10 most expensive suburbs this quarter" list is constantly varying. Quarterly Reports for the last two years can be found on the REISA website. Education and research Education forms an increasingly important part of the city's economy, with the South Australian Government and educational institutions attempting to position Adelaide as "Australia's education hub" and marketing it as a "Learning City." The number of international students studying in Adelaide has increased rapidly in recent years to 30,726 in 2015, of which 1,824 were secondary school students. In addition to the city's existing institutions, foreign institutions have been attracted to set up campuses to increase its attractiveness as an education hub. Adelaide is the birthplace of three Nobel laureates, more than any other Australian city: physicist William Lawrence Bragg and pathologists Howard Florey and Robin Warren, all of whom completed secondary and tertiary education at St Peter's College and the University of Adelaide. Primary and secondary education There are two systems of primary and secondary schools, a public system operated by the South Australian Government's Department for Education, and a private system of independent and Catholic schools. South Australian schools provide education under the Australian Curriculum for reception to Year 10 students. In Years 10 to 12, students study for the South Australian Certificate of Education (SACE). They have the option of incorporating vocational education and training (VET) courses or a flexible learning option (FLO). South Australia also has 24 schools that use International Baccalaureate programs as an alternative to the Australian Curriculum or SACE. These programs include the IB Primary Years Programme, the IB Middle Years Programme, and the IB Diploma Programme. For South Australian students who cannot attend a traditional school, including students who live in rural or remote areas, the state government runs the Open Access College (OAC), which provides virtual teaching. The OAC has a campus in Marden which caters to students from reception to Year 12 and adults who haven't been able to complete their SACE. Guardians are also able to apply for their child to be educated from home as long as they provide an education program which meets the same requirements as the Australian Curriculum as well as opportunities for social interaction. Tertiary education There are three public universities local to Adelaide, as well as one private university and three constituent colleges of foreign universities. Flinders University of South Australia, the University of Adelaide, the University of South Australia and Torrens University Australia—part of the Laureate International Universities are based in Adelaide. The University of Adelaide was ranked in the top 150 universities worldwide. Flinders ranked in the top 250 and Uni SA in the top 300. Torrens University Australia is part of an international network of over 70 higher education institutions in more than 30 countries worldwide. The historic Torrens Building in Victoria Square houses Carnegie Mellon University's Heinz College Australia, and University College London's School of Energy and Resources (Australia), and constitute the city's international university precinct. The University of Adelaide, with 25,000 students, is Australia's third-oldest university and a member of the leading "Group of Eight". It has five campuses throughout the state, including two in the city-centre, and a campus in Singapore. The University of South Australia, with 37,000 students, has two North Terrace campuses, three other campuses in the metropolitan area and campuses in the regional cities of Whyalla and Mount Gambier. The University of Adelaide and the University of South Australia have had multiple proposals to merge into a single university. A proposal in 2018 failed due to uncertainty as to the new name and leadership of the merged university. In 2022, the universities announced a new merger proposal, with the name and leadership issues settled and support from the South Australian government. Flinders University, with 25,184 students, is based in the southern suburb of Bedford Park, alongside the Flinders Medical Centre, with additional campuses in neighbouring Tonsley and in Victoria Square in the city centre. The Adelaide College of Divinity is at Brooklyn Park. There are several South Australian TAFE (Technical and Further Education) campuses in the metropolitan area that provide a range of vocational education and training. The Adelaide College of the Arts, as a school of TAFE SA, provides nationally recognised training in visual and performing arts. Research In addition to the universities, Adelaide is home to research institutes, including the Royal Institution of Australia, established in 2009 as a counterpart to the two-hundred-year-old Royal Institution of Great Britain. Many of the organisations involved in research tend to be geographically clustered throughout the Adelaide metropolitan area: The east end of North Terrace: SA Pathology; Hanson Institute; National Wine Centre. The west end of North Terrace: South Australian Health and Medical Research Institute (SAHMRI), located next to the Royal Adelaide Hospital. The Waite Research Precinct: SARDI Head Office and Plant Research Centre; AWRI; ACPFG; CSIRO research laboratories. SARDI also has establishments at Glenside and West Beach. Edinburgh, South Australia: DSTO; BAE Systems (Australia); Lockheed Martin Australia Electronic Systems. Technology Park (Mawson Lakes): BAE Systems; Optus; Raytheon; Topcon; Lockheed Martin Australia Electronic Systems. Research Park at Thebarton: businesses involved in materials engineering, biotechnology, environmental services, information technology, industrial design, laser/optics technology, health products, engineering services, radar systems, telecommunications and petroleum services. Science Park (adjacent to Flinders University): Playford Capital. The Basil Hetzel Institute for Translational Health Research in Woodville the research arm of the Queen Elizabeth Hospital, Adelaide The Joanna Briggs Institute, a global research collaboration for evidence-based healthcare with its headquarters in North Adelaide. Cultural life While established as a British province, and very much English in terms of its culture, Adelaide attracted immigrants from other parts of Europe early on, including German and other European non-conformists escaping religious persecution. The first German Lutherans arrived in 1838, bringing with them the vine cuttings that they used to found the acclaimed wineries of the Barossa Valley. The Royal Adelaide Show is an annual agricultural show and state fair, established in 1839 and now a huge event held in the Adelaide Showground annually. Adelaide's arts scene flourished in the 1960s and 1970s with the support of successive premiers from both major political parties. The renowned Adelaide Festival of Arts was established in 1960 under Thomas Playford, which in the same year spawned an unofficial uncurated series of performances and exhibits which grew into the Adelaide Fringe. Construction of the Adelaide Festival Centre began under Steele Hall in 1970 and was completed under the subsequent government of Don Dunstan, who also established the South Australian Film Corporation in 1972 and the State Opera of South Australia in 1976. Over time, the Adelaide Festival expanded to include Adelaide Writers' Week and WOMADelaide, and other separate festivals were established, such as the Adelaide Cabaret Festival (2002), the Adelaide Festival of Ideas (1999), the Adelaide Film Festival (2013), FEAST (1999, a queer culture), Tasting Australia (1997, a food and wine affair), and Illuminate Adelaide (2021). With the Festival, the Fringe, WOMADelaide, Writers' Week and the Adelaide 500 street motor racing event (along with evening music concerts) all happening in early March, the period became known colloquially as "Mad March". In 2014, Ghil'ad Zuckermann founded the Adelaide Language Festival. There are many international cultural fairs, most notably the German Schützenfest and Greek Glendi. Adelaide holds an annual Christmas pageant, the world's largest Christmas parade. North Terrace institutions As the state capital, Adelaide has a great number of cultural institutions, many of them along the boulevard of North Terrace. The Art Gallery of South Australia, with about 35,000 works, holds Australia's second largest state-based collection. Adjacent are the South Australian Museum and State Library of South Australia. The Adelaide Botanic Garden, National Wine Centre and Tandanya National Aboriginal Cultural Institute are nearby in the East End of the city. In the back of the State Library lies the Migration Museum, Australia's oldest museum of its kind. Further west, the Lion Arts Centre is home to ACE Open, which showcases contemporary art; Dance Hub SA; and other studios and arts industry spaces. The Mercury Cinema and the JamFactory ceramics and design gallery are just around the corner. Performing arts and music venues The Adelaide Festival Centre (which includes the Dunstan Playhouse, Festival Theatre and Space Theatre), on the banks of the Torrens, is the focal point for much of the cultural activity in the city and home to the State Theatre Company of South Australia. Other live music and theatre venues include the Adelaide Entertainment Centre; Adelaide Oval; Memorial Drive Park; Thebarton Theatre; Adelaide Town Hall; Her Majesty's Theatre; Queen's Theatre; Holden Theatres; and the Hopgood Theatre. The Lion Arts Factory, within the Lion Arts Centre, hosts contemporary music in a wide range of genres, as does "The Gov" in Hindmarsh. The city also has numerous smaller theatres, pubs and cabaret bars which host performances. Live music In 2015, it was said that there were now more live music venues per capita in Adelaide than any other capital city in the southern hemisphere, Lonely Planet labelled Adelaide "Australia's live music city", and the city was recognised as a "City of Music" by the UNESCO Creative Cities Network. In addition to its own WOMAD (WOMADelaide), Adelaide attracts several touring music festivals, including Creamfields, Laneway and Groovin'. Adelaide has produced musical groups and individuals who have achieved national and international fame. These include the Adelaide Symphony Orchestra, the Adelaide Youth Orchestra, rock bands The Angels, Atlas Genius, Cold Chisel, The Superjesus, Wolf & Cub, roots/blues group The Audreys, internationally acclaimed metal acts I Killed The Prom Queen and Double Dragon, popular Australian hip-hop outfit Hilltop Hoods, pop acts like Sia, Orianthi, Guy Sebastian, and Wes Carr, as well as internationally successful tribute act, The Australian Pink Floyd Show. Noted rocker Jimmy Barnes (formerly lead vocalist with Cold Chisel) spent most of his youth in the northern suburb of Elizabeth. Paul Kelly grew up in Adelaide and was head prefect at Rostrevor College. The first Australian Idol winner, Guy Sebastian, hails from the north-eastern suburb of Golden Grove. Television Adelaide is served by numerous digital free-to-air television channels: ABC ABC HD (ABC broadcast in HD) ABC TV Plus ABC Me ABC News SBS SBS HD (SBS broadcast in HD) SBS World Movies HD SBS Viceland HD SBS Food NITV SBS WorldWatch Seven 7HD (Seven broadcast in HD) 7Two 7mate 7Bravo 7flix Racing.com Nine 9HD (Nine broadcast in HD) 9Gem 9Go! 9Life 9Gem HD 9Rush Extra 10 10 HD (10 broadcast in HD) 10 Bold 10 Peach 10 Shake TVSN Gecko TV C44 Adelaide (Adelaide's community TV station) All of the five Australian national television networks broadcast both high-definition digital and standard-definition digital television services in Adelaide. They share three transmission towers on the ridge near the summit of Mount Lofty. There are two other transmission sites at 25 Grenfell Street, Adelaide and Elizabeth Downs. The two government-funded stations are run by the Australian Broadcasting Corporation (ABC South Australia) and the Special Broadcasting Service (SBS). The Seven Network and Network Ten both own their Adelaide stations (SAS-7 and ADS-10 respectively). Adelaide's NWS-9 is part of the Nine Network. Adelaide also has a community television station, Channel 44. As part of a nationwide phase-out of analogue television in Australia, Adelaide's analogue television service was shut down on 2 April 2013. The Foxtel pay TV service is also available via cable or satellite to the entire metropolitan area. All the major broadcasting networks also operate online on-demand television services, alongside internet-only services such as Stan, Fetch TV, Netflix, YouTube, Disney+, and Kayo Sports. Radio There are 20 radio stations that serve the metropolitan area, as well as four stations that serve only parts of the metropolitan area; six commercial stations, six community stations, six national stations and two narrowcast stations. DAB+ digital radio has been broadcasting in metropolitan Adelaide since 20 May 2009, and currently offers a choice of 41 stations all operated by the existing licensed radio broadcasters, which includes high-quality simulcast of all AM and FM stations. Sport The main sports played professionally in Adelaide are Australian Rules football, soccer, cricket, netball, and basketball. Adelaide is the home of two Australian Football League teams: the Adelaide Football Club and Port Adelaide Football Club, and one A-League soccer team, Adelaide United. A local Australian rules football league, the South Australian National Football League (SANFL), is made up of 10 teams from around Adelaide. The SANFL has been in operation since 1877 when it began as the South Australian Football Association (SAFA) before changing its name to the SANFL in 1927. The SANFL is the oldest surviving football league of any code played in Australia. Adelaide has developed a strong culture of attracting crowds to major sporting events. Until the completion of the 2012–14 renovation and upgrade of the Adelaide Oval, most large sporting events took place at either Football Park (the then home base of the Adelaide Crows, and the then Port Adelaide home game venue), or the historic Adelaide Oval, home of the South Australia Redbacks and the Adelaide Strikers cricket teams. Since completion of the upgrade, home games for Adelaide Crows and Port Adelaide now take place at Adelaide Oval. Since 1884, Adelaide Oval has also hosted an international cricket test every summer, along with a number of One Day International cricket matches. Memorial Drive Park, adjacent to the Adelaide Oval, used to host Davis Cup and other major tennis events, including the Australian Open and the Adelaide International. Adelaide's professional association football team, Adelaide United, play in the A-League. Founded in 2003, their home ground is Hindmarsh Stadium, which has a capacity of 17,000 and is one of the few purpose-built soccer stadia in Australia. Prior to United's foundation, Adelaide City and West Adelaide represented the city in the National Soccer League. The two sides, which contest the Adelaide derby against one another, now play in the National Premier Leagues South Australia. For two years, 1997 and 1998, Adelaide was represented in Australia's top level rugby league, after the New South Wales Rugby League had played a single game per season at the Adelaide Oval for five years starting in 1991. The Adelaide Rams were formed and played in the breakaway Super League (SL) competition in 1997 before moving to the new National Rugby League in 1998. Initially playing at the Adelaide Oval, the club moved to the more suitable Hindmarsh Stadium late in the 1998 season. As part of a peace deal with the Australian Rugby League to end the Super League war, the club's owners News Limited (who were also owners of the SL) suddenly closed the club only weeks before the start of the 1999 season. Adelaide has two professional basketball teams, the men's team being the Adelaide 36ers which plays in the National Basketball League (NBL) and the women's team, the Adelaide Lightning which plays in the Women's National Basketball League (WNBL). Both teams play their home games at the Titanium Security Arena. Adelaide has a professional netball team, the Adelaide Thunderbirds, which plays in the national netball competition, the Suncorp Super Netball championship, with home games played at Netball SA Stadium. The Thunderbirds occasionally play games or finals at the Titanium Security Arena, while international netball matches are usually played at the 10,500 seat Adelaide Entertainment Centre. The Titanium Security Arena has a capacity of 8,000 and is the largest purpose-built basketball stadium in Australia. Since 1999 Adelaide and its surrounding areas have hosted the Tour Down Under bicycle race, organised and directed by Adelaide-based Michael Turtur. Turtur won an Olympic gold medal for Australia in the 4000 m team pursuit at the 1984 Los Angeles Olympics. The Tour Down Under is the largest cycling event outside Europe and was the first event outside Europe to be granted UCI ProTour status. Adelaide maintains a franchise in the Australian Baseball League, the Adelaide Giants. They have been playing since 2009, and their home stadium (until 2016) was Norwood Oval. From 2016 the team moved to the Diamond Sports Stadium located near the Adelaide International Airport due to renovations at Norwood. Adelaide also has an ice hockey team, Adelaide Adrenaline in the Australian Ice Hockey League (AIHL). It was national champions in 2009 and plays its games at the IceArenA. The Australian Grand Prix for World Championship Formula One racing was hosted by Adelaide from 1985 to 1995 on the Adelaide Street Circuit which was laid out in the city's East End as well as the eastern parklands including the Victoria Park Racecourse. The Grand Prix became a source of pride, and losing the event to Melbourne in a surprise announcement in mid-1993 left a void that has since been filled with the Adelaide 500 for V8 Supercar racing, held on a modified version of the same street circuit. The Classic Adelaide, a rally of classic sporting vehicles, is also held in the city and its surrounds. Adelaide formerly had three horse racing venues. Victoria Park, Cheltenham Park Racecourse, both of which have now closed, and Morphettville Racecourse that remains the home of the South Australian Jockey Club. It also has Globe Derby Park for Harness racing that opened in 1969, and by 1973 had become Adelaide's premier harness racing venue taking over from the Wayville Showgrounds, as well as Greyhound Park for greyhound racing that opened in 1972. The World Solar Challenge race attracts teams from around the world, most of which are fielded by universities or corporations, although some are fielded by high schools. The race has a 20-years' history spanning nine races, with the inaugural event taking place in 1987. Adelaide hosted the 2012 World Bowls Championships at Lockleys Bowling Club, becoming the third city in the world to have held the championships twice, having previously hosted the event in 1996. Dirt track speedway is also popular in Adelaide with three operating speedways. Adelaide Motorsport Park, located adjacent to the Adelaide International Raceway road racing circuit at Virginia ( north of the city centre) has been in continuous operation since 1979 after the closure of the popular Rowley Park Speedway. Gillman Speedway located in the semi-industrial suburb of Gillman, has been in operation since 1998 and caters to Motorcycle speedway and Sidecars, while the Sidewinders Speedway located in Wingfield is also a motorcycle speedway dedicated to Under-16 riders and has been in operation since 1978. In 2016, backed by South Australia's Peregrine Corporation opened up a multi-purpose facility; a state-of-the-art motorsporting park and a hotel alongside its newer OTR service station outside a small township of Tailem Bend currently named The Bend Motorsport Park. Design for thrill seekers and rev-heads the facility currently host South Australia's second Supercars motoring event during a round in August. Adelaide is home to the Great Southern Slam, the world's largest roller derby tournament. The tournament has been held biennially over Australia's Queen's Birthday holiday weekend since 2010. In 2014, and 2016 the tournament featured 45 teams playing in two divisions. In 2018, the tournament has expanded to 48 teams competing in three divisions. Infrastructure Transport Being centrally located on the Australian mainland, Adelaide forms a strategic transport hub for east–west and north–south routes. The city itself has a metropolitan public transport system managed by and known as the Adelaide Metro. The Adelaide Metro consists of a contracted bus system including the O-Bahn Busway, 6 commuter rail lines (diesel and electric), and a small tram network operating between inner suburb Hindmarsh, the city centre, and seaside Glenelg. Tramways were largely dismantled in the 1950s, but saw a revival in the 2010s with upgrades and extensions. Road transport in Adelaide has historically been easier than many of the other Australian cities, with a well-defined city layout and wide multiple-lane roads from the beginning of its development. Adelaide was known as a "twenty-minute city", with commuters having been able to travel from metropolitan outskirts to the city proper in roughly twenty minutes. However, such arterial roads often experience traffic congestion as the city grows. The Adelaide metropolitan area has one freeway and four expressways. In order of construction, they are: The South Eastern Freeway (M1), connects the south-east corner of the Adelaide Plain to the Adelaide Hills and beyond to Murray Bridge and Tailem Bend, where it then continues as National Highway 1 south-east to Melbourne. The Southern Expressway (M2), connecting the outer southern suburbs with the inner southern suburbs and the city centre. It duplicates the route of South Road. The North-South Motorway (M2), is an ongoing major project that will become the major north–south corridor, replacing most of what is now South Road, connecting the Southern Expressway and the Northern Expressway via a motorway with no traffic lights. As of 2020 the motorway's northern half is complete (save for a small link under construction at Croydon Park), connecting the Northern Expressway to Adelaide's inner north-west; the section running through Adelaide's inner west and inner south-west is awaiting funding. The Port River Expressway (A9), connects Port Adelaide and Outer Harbor to Port Wakefield Road at the northern "entrance" to the metropolitan area. The Northern Expressway (Max Fatchen Expressway) (M2), is the northern suburbs bypass route connecting the Sturt Highway (National Highway 20) via the Gawler Bypass to Port Wakefield Road at a point a few kilometres north of the Port River Expressway connection. The Northern Connector, completed in 2020, links the North South Motorway to the Northern Expressway. Airports The Adelaide metropolitan area has two commercial airports, Adelaide Airport and Parafield Airport. Adelaide Airport, in Adelaide's south-western suburbs, serves in excess of 8 million passengers annually. Parafield Airport, Adelaide's second airport north of the city centre, is used for small aircraft, pilot training and recreational aviation purposes. Parafield Airport served as Adelaide's main aerodrome until the opening of the Adelaide Airport in February 1955. Adelaide Airport serves many international and domestic destinations including all Australian state capitals. Adelaide is also home to a military airport, known as Edinburgh Airport, located in the northern suburbs. It was built in 1955 in a joint initiative with the United Kingdom for weapon development. Health Adelaide's two largest hospitals are the Royal Adelaide Hospital (RAH) in Adelaide Parklands, a teaching hospital affiliated with the University of Adelaide (800 beds), and the Flinders Medical Centre (580 beds) at Bedford Park, affiliated with Flinders University. The RAH also operates additional campuses for specialist care throughout the suburbs including the Hampstead Rehabilitation Centre (150 beds) at Northfield and the Glenside Campus (129 beds) for acute mental health services. Other major public hospitals are the Women's and Children's Hospital (305 beds), at North Adelaide; the Queen Elizabeth Hospital (340 beds) at Woodville; Modbury Hospital (178 beds) at Modbury; and the Lyell McEwin Hospital (198 beds) at Elizabeth Vale. Numerous private hospitals are also located throughout the city, with the largest operators being not-for-profits Adelaide Community Healthcare Alliance (3 hospitals) and Calvary Care (4 hospitals). In 2017, the RAH was relocated from the city's East End to a new AU$2.3 billion facility built over former railyards in the West End. The state-of-the-art hospital forms part of a new biomedical precinct called BioMed City that collocates the South Australian Health and Medical Research Institute (SAHMRI), the University of Adelaide Health and Medical Sciences building, the University of South Australia's Health Innovation Building, and the state's Dental Hospital. SAHMRI is building a $300 million second facility due to be completed by 2022 to house the Australian Bragg Centre with Australia's first proton therapy unit. There are also plans for the Women's and Children's Hospital to be relocated to the precinct adjacent the RAH by 2024. The largest provider of community health care within Adelaide is the not-for-profit Royal District Nursing Service (RDNS), which provides out of hospital care and hospital avoidance care. Energy Adelaide's energy requirements were originally met by the Adelaide Electric Supply Company, which was nationalised by the Playford government in 1946, becoming the Electricity Trust of South Australia (ETSA). Despite significant public opposition and the Labor party's anti-privatisation stance which left the Liberal party one vote short of the numbers needed to pass the legislation, ETSA was privatised by the Olsen Government in 1999 by way of a 200-year lease for the distribution network (ETSA Utilities, later renamed SA Power Networks) and the outright purchase of ETSA Power by the Cheung Kong Holdings for $3.5 billion (11 times ETSA's annual earnings) after Labor MP Trevor Crothers resigned from the party and voted with the government. The electricity retail market was opened to competition in 2003 and although competition was expected to result in lower retail costs, prices increased by 23.7% in the market's first year. In 2004, the privatisation was deemed to be a failure with consumers paying 60% more for their power and with the state government estimated to lose $3 billion in power generation net income in the first ten years of privatisation. In 2012, the industry came under scrutiny for allegedly reducing supply by shutting down generators during periods of peak demand to force prices up. Increased media attention also revealed that in 2009 the state government had approved a 46% increase in retail prices to cover expected increases in the costs of generation while generation costs had in fact fallen 35% by 2012. South Australia has the highest retail price for electricity in the country. Privatisation led to competition from a variety of companies who now separately provide for the generation, transmission, distribution and retail sales of gas and electricity. Electricity generation comes from a range of technologies and operators. ElectraNet operates the high-voltage electricity transmission network. SA Power Networks distributes electricity to end users. The largest electricity and gas retailing companies are also the largest generating companies. The largest fossil fuel power stations are the Torrens Island Power Station gas-fired plant operated by AGL Energy and the Pelican Point Power Station operated by Engie. South Australia also has wind and solar power and connections to the national grid. Gas is supplied from the Moomba Gas Processing Plant in the Cooper Basin via the Moomba Adelaide Pipeline System and the SEAGas pipeline from Victoria. In 2011, South Australia generated 18% of its electricity from wind power, and had 51% of the installed capacity of wind generators in Australia. Due to almost universal blackouts within the city during September 2016, the state worked with Tesla to produce the world's largest electricity battery at Hornsdale Power Reserve which has increased that state's electrical security to the extent in which large blackouts are no longer an event. Water The provision of water services is by the government-owned SA Water. Adelaide's water is supplied from its seven reservoirs: Mount Bold, Happy Valley, Myponga, Millbrook, Hope Valley, Little Para and South Para. The yield from these reservoir catchments can be as little as 10% of the city's requirements (90GL per annum) in drought years and about 60% in average years. The remaining demand is met by the pumping of water from the River Murray. A sea-water desalination plant capable of supplying 100GL per annum was built during the 2001–2009 drought; however, it operated at about 8% of its capacity until 2019. In December 2018, the State and Federal Governments agreed to fund a $2m study to determine how the plant could be used to reduce reliance on river water, in an effort to help save the Murray River basin and mouth (including the Coorong) from further ecological damage. Communications AdelaideFree WiFi is a citywide free Wi-Fi network covering most of the inner city areas of Adelaide, primarily the Adelaide CBD and Northern Adelaide precincts. It was officially launched at the Adelaide Central Markets on Tuesday 25 June 2014. It is provided by Internode, with infrastructure provided by outdoor Cisco WiFi N access points attached to the top of lighting poles, as well as inside cafes and businesses across the city. See also Adelaide Hills City of Adelaide Music of Adelaide Port Adelaide Lists Images of Adelaide List of Adelaide obsolete suburb names List of Adelaide parks and gardens List of Adelaide railway stations List of Adelaide suburbs List of films shot in Adelaide List of people from Adelaide List of protected areas in Adelaide List of public art in South Australia List of public transport routes in Adelaide List of South Australian commercial icons List of sporting clubs in Adelaide List of tallest buildings in Adelaide Sister cities of the City of Adelaide (the Local government area that governs the city centre) Tourist attractions in South Australia Notes References Further reading (full text) External links Adelaide City Council > Official City Guide Adelaide City Council Kids in Adelaide Retrieved 12 May 2020. 1836 establishments in Australia Australian capital cities Cities in South Australia Coastal cities in Australia Planned capitals Populated places established in 1836 Metropolitan areas of Australia	16
Alan Garner (born 17 October 1934) is an English novelist best known for his children's fantasy novels and his retellings of traditional British folk tales. Much of his work is rooted in the landscape, history and folklore of his native county of Cheshire, North West England, being set in the region and making use of the native Cheshire dialect. Born in Congleton, Garner grew up around the nearby town of Alderley Edge, and spent much of his youth in the wooded area known locally as "The Edge", where he gained an early interest in the folklore of the region. Studying at Manchester Grammar School and then briefly at Oxford University, in 1957 he moved to the village of Blackden, where he bought and renovated an Early Modern Period (circa 1590) building known as Toad Hall. His first novel, The Weirdstone of Brisingamen, was published in 1960. A children's fantasy novel set on the Edge, it incorporated elements of local folklore in its plot and characters. Garner wrote a sequel, The Moon of Gomrath (1963), and a third book, Boneland (2012). He wrote several fantasy novels, including Elidor (1965), The Owl Service (1967) and Red Shift (1973). Turning away from fantasy as a genre, Garner produced The Stone Book Quartet (1979), a series of four short novellas detailing a day in the life of four generations of his family. He also published a series of British folk tales which he had rewritten in a series of books entitled Alan Garner's Fairy Tales of Gold (1979), Alan Garner's Book of British Fairy Tales (1984) and A Bag of Moonshine (1986). In his subsequent novels, Strandloper (1996) and Thursbitch (2003), he continued writing tales revolving around Cheshire, although without the fantasy elements which had characterised his earlier work. Biography Early life: 1934–56 Garner was born in the front room of his grandmother's house in Congleton, Cheshire, on 17 October 1934. He was raised in nearby Alderley Edge, a well-to-do village that had effectively become a suburb of Manchester. His "rural working-class family", had been connected to Alderley Edge since at least the sixteenth century and could be traced back to the death of William Garner in 1592. Garner has stated that his family had passed on "a genuine oral tradition" involving folk tales about The Edge, which included a description of a king and his army of knights who slept under it, guarded by a wizard. In the mid-nineteenth century Alan's great-great-grandfather Robert had carved the face of a bearded wizard onto the face of a cliff next to a well, known locally at that time as the Wizard's Well. Robert Garner and his other relatives had all been craftsmen, and, according to Garner, each successive generation had tried to "improve on, or do something different from, the previous generation". Garner's grandfather, Joseph Garner, "could read, but didn't and so was virtually unlettered". Instead, he taught his grandson the folk tales he knew about The Edge. Garner later remarked that as a result, he was "aware of [the Edge's] magic" as a child, and he and his friends often played there. The story of the king and the wizard living under the hill played an important part in his life, becoming, he explained, "deeply embedded in my psyche" and heavily influencing his later novels. Garner faced several life-threatening childhood illnesses, which left him bed ridden for much of the time. He attended a local village school, where he found that, despite being praised for his intelligence, he was punished for speaking in his native Cheshire dialect; for instance, when he was six his primary school teacher washed his mouth out with soapy water. Garner then won a place at Manchester Grammar School, where he received his secondary education; entry was means-tested, resulting in his school fees being waived. Rather than focusing his interest on creative writing, it was here that he excelled at sprinting. He used to go jogging along the highway, and later claimed that in doing so he was sometimes accompanied by the mathematician Alan Turing, who shared his fascination for the Disney film Snow White and the Seven Dwarfs. Garner was then conscripted into national service, serving for a time with the Royal Artillery while posted to Woolwich in Southeast London. At school, Garner had developed a keen interest in the work of Aeschylus and Homer, as well as the Ancient Greek language. Thus, he decided to pursue the study of Classics at Magdalen College, Oxford, passing his entrance exams in January 1953; at the time he had thoughts of becoming a professional academic. He was the first member of his family to receive anything more than a basic education, and he noted that this removed him from his "cultural background" and led to something of a schism with other members of his family, who "could not cope with me, and I could not cope with" them. Looking back, he remarked, "I soon learned that it was not a good idea to come home excited over irregular verbs". In 1955, he joined the university theatrical society, playing the role of Mark Antony in a performance of William Shakespeare's Antony and Cleopatra where he co-starred alongside Dudley Moore and where Kenneth Baker was the stage manager. In August 1956, he decided that he wished to devote himself to novel writing, and decided to abandon his university education without taking a degree; he left Oxford in late 1956. He nevertheless felt that the academic rigour which he learned during his university studies has remained "a permanent strength through all my life". The Weirdstone of Brisingamen and The Moon of Gomrath: 1957–64 Aged 22, Garner was out cycling when he came across a hand-painted sign announcing that an agricultural cottage in Toad Hall – a late medieval building situated in Blackden, seven miles from Alderley Edge – was on sale for £510. Although he personally could not afford it, he was lent the money by the local Oddfellow lodge, enabling him to purchase and move into the cottage in June 1957. In the late nineteenth century the Hall had been divided into two agricultural labourers' cottages, but Garner was able to purchase the second for £150 about a year later; he proceeded to knock down the dividing walls and convert both halves back into a single home. Garner had begun writing his first novel, The Weirdstone of Brisingamen: A Tale of Alderley, in September 1956. However it was while at Toad Hall that he finished the book. Set in Alderley Edge, it revolves around two children, Susan and Colin, who are sent to live in the area with their mother's old nursemaid, Bess, and her husband, Gowther Mossock. While exploring the Edge, they encounter a race of malevolent creatures, the svart alfar, who dwell in the Edge's abandoned mines and who seem intent on capturing them. They are rescued by the wizard Cadellin, who reveals that the forces of darkness are massing at the Edge in search of a powerful magical talisman, the eponymous "weirdstone of Brisingamen". Whilst writing in his spare time Garner attempted to gain employment as a teacher, but soon gave that up, believing that "I couldn't write and teach; the energies were too similar." Instead, he worked off and on as a general labourer for four years, remaining unemployed for much of that time. Garner sent his debut novel to the publishing company Collins, where it was picked up by the company's head, Sir William Collins, who was on the lookout for new fantasy novels following the recent commercial and critical success of J. R. R. Tolkien's The Lord of the Rings (1954–55). Garner, who went on to become a personal friend of Collins, would later relate that "Billy Collins saw a title with funny-looking words in it on the stockpile, and he decided to publish it." On its release in 1960, The Weirdstone of Brisingamen proved to be a critical and commercial success, later being described as "a tour de force of the imagination, a novel that showed almost every writer who came afterwards what it was possible to achieve in novels ostensibly published for children." Garner himself however would later denounce his first novel as "a fairly bad book" in 1968. With his first book published, Garner abandoned his work as a labourer and gained a job as a freelance television reporter, living a "hand to mouth" lifestyle on a "shoestring" budget. He also began a sequel to The Weirdstone of Brisingamen, which would be known as The Moon of Gomrath. The Moon of Gomrath also revolves around the adventures of Colin and Susan, with the latter being possessed by a malevolent creature called the Brollachan who has recently re-entered the world, having been freed from its underground prison by workmen. With the help of the wizard Cadellin, the Brollachan is exorcised, but Susan's soul also leaves her body, being sent to another dimension, leaving Colin to find a way to bring it back. Critic Neil Philip characterised it as "an artistic advance" but "a less satisfying story". In a 1989 interview, Garner stated that he had left scope for a third book following the adventures of Colin and Susan, envisioning a trilogy, but that he had intentionally decided not to write it, instead moving on to write something different. However Boneland, the conclusion to the sequence, was belatedly published in August 2012. Elidor, The Owl Service and Red Shift: 1964–73 In 1962, Garner began work on a radio play entitled Elidor, which eventually became a novel of the same name. Set in contemporary Manchester, Elidor tells the story of four children who enter a derelict Victorian church and find a portal to the magical realm of Elidor. In Elidor, they are entrusted by King Malebron to help rescue four treasures which have been stolen by the forces of evil, who are attempting to take control of the kingdom. The children succeed and return to Manchester with the treasures, but are pursued by the malevolent forces who need the items to seal their victory. Before writing Elidor, Garner had seen a dinner service set which could be arranged to make pictures of either flowers or owls. Inspired by this design, he produced his fourth novel, The Owl Service. The story, which was heavily influenced by the Medieval Welsh tale of Math fab Mathonwy from the Mabinogion, was critically acclaimed, winning both the Carnegie Medal and Guardian Children's Fiction Prize. It also sparked discussions among critics as to whether Garner should properly be considered a children's writer, given that this book in particular was deemed equally suitable for an adult readership. It took Garner six years to write his next novel, Red Shift. The book centres on three intertwined love stories, one set in the present, another during the English Civil War, and the third in the second century CE. Philip referred to it as "a complex book but not a complicated one: the bare lines of story and emotion stand clear". Academic specialist in children's literature Maria Nikolajeva characterised Red Shift as "a difficult book" for an unprepared reader, identifying its main themes as those of "loneliness and failure to communicate". Ultimately, she thought that repeated re-readings of the novel bring about the realisation that "it is a perfectly realistic story with much more depth and psychologically more credible than the most so-called "realistic" juvenile novels." The Stone Book series and folkloric collections: 1974–94 From 1976 to 1978, Garner published a series of four novellas, which have come to be collectively known as The Stone Book quartet: The Stone Book, Granny Reardun, The Aimer Gate, and Tom Fobble's Day. Each focused on a day in the life of a child in the Garner family, each from a different generation. In a 1989 interview, Garner noted that although writing The Stone Book Quartet had been "exhausting", it had been "the most rewarding of everything" he'd done to date. Philip described the quartet as "a complete command of the material he had been working and reworking since the start of his career". Garner pays particular attention to language, and strives to render the cadence of the Cheshire tongue in modern English. This he explains by the sense of anger he felt on reading Sir Gawain and the Green Knight: the footnotes would not have been needed by his father. In 1981, the literary critic Neil Philip published an analysis of Garner's novels as A Fine Anger, which was based on his doctoral thesis, produced for the University of London in 1980. In this study he noted that "The Stone Book quartet marks a watershed in Garner's writing career, and provides a suitable moment for an evaluation of his work thus far." Strandloper, Thursbitch, Boneland, Where Shall We Run To? and Treacle Walker: 1996–present In 1996, Garner's novel Strandloper was published. In 1997, he next wrote The Voice That Thunders, a collection of essays and public talks that contains much autobiographical material (including an account of his life with bipolar disorder), as well as critical reflection upon folklore and language, literature and education, the nature of myth and time. In The Voice That Thunders, he reveals the commercial pressure placed upon him during the decade-long drought which preceded Strandloper to 'forsake "literature", and become instead a "popular" writer, cashing in on my established name by producing sequels to, and making series of, the earlier books'. Garner feared that "making series ... would render sterile the existing work, the life that produced it, and bring about my artistic and spiritual death" and felt unable to comply. Garner's novel Thursbitch was published in 2003. The novel Boneland was published in 2012, nominally completing a trilogy begun some 50 years earlier with The Weirdstone of Brisingamen. In August 2018, Garner published his only set of memoirs, Where Shall We Run To?, which describes his childhood during the Second World War. The novel Treacle Walker was published in October 2021 and nominated to the shortlist for the 2022 Booker Prize. Personal life With his first wife Ann Cook he had three children. In 1972, he married for a second time, this time to Griselda Greaves, a teacher and critic with whom he had two children. In a 2014 interview conducted with Mike Pitts for British Archaeology magazine, Garner stated that "I don't have anything to do with the literary world. I avoid writers. I don't like them. Most of my close personal friends are professional archaeologists." Literary style Although Garner's early work is often labelled as "children's literature", Garner himself rejects such a description, informing one interviewer that "I certainly have never written for children" but that instead, he has always written purely for himself. Neil Philip, in his critical study of Garner's work (1981), commented that up until that point "Everything Alan Garner has published has been published for children", although he went on to relate that "It may be that Garner's is a case" where the division between children's and adults' literature is "meaningless" and that his fiction is instead "enjoyed by a type of person, no matter what their age." He said "An adult point of view would not give me the ability to be as fresh in my vision as a child's point of view, because the child is still discovering the universe and many adults are not." Philip offered the opinion that the "essence of his work" was "the struggle to render the complex in simple, bare terms; to couch the abstract in the concrete and communicate it directly to the reader". He added that Garner's work is "intensely autobiographical, in both obvious and subtle ways". Highlighting Garner's use of mythological and folkloric sources, Philip stated that his work explores "the disjointed and troubled psychological and emotional landscape of the twentieth century through the symbolism of myth and folklore." He also expressed the opinion that "Time is Garner's most consistent theme". The English author and academic Catherine Butler noted that Garner was attentive to the "geological, archaeological and cultural history of his settings, and careful to integrate his fiction with the physical reality beyond the page." As a part of this, Garner had included maps of Alderley Edge in both The Weirdstone of Brisingamen and The Moon of Gomrath. Garner has spent much time investigating the areas that he deals with in his books; writing in the Times Literary Supplement in 1968, Garner commented that in preparation for writing his book Elidor: I had to read extensively textbooks on physics, Celtic symbolism, unicorns, medieval watermarks, megalithic archaeology; study the writings of Jung; brush up my Plato; visit Avebury, Silbury and Coventry Cathedral; spend a lot of time with demolition gangs on slum clearance sites; and listen to the whole of Britten's War Requiem nearly every day. Recognition and legacy In a paper published in the Children's Literature Association Quarterly, Maria Nikolajeva characterised Garner as "one of the most controversial" authors of modern children's literature. In the fiftieth anniversary edition of The Weirdstone of Brisingamen, published by HarperCollins in 2010, several notable British fantasists praised Garner and his work. Susan Cooper wrote that "The power and range of Alan Garner's astounding talent has grown with every book he's written", and David Almond called him one of Britain's "greatest writers" whose works "really matter". Philip Pullman, the author of the His Dark Materials trilogy, went further: Garner is indisputably the great originator, the most important British writer of fantasy since Tolkien, and in many respects better than Tolkien, because deeper and more truthful... Any country except Britain would have long ago recognised his importance, and celebrated it with postage stamps and statues and street-names. But that's the way with us: our greatest prophets go unnoticed by the politicians and the owners of media empires. I salute him with the most heartfelt respect and admiration. Another British fantasy writer, Neil Gaiman, claimed that "Garner's fiction is something special" in that it was "smart and challenging, based in the here and the now, in which real English places emerged from the shadows of folklore, and in which people found themselves walking, living and battling their way through the dreams and patterns of myth." Praise also came from Nick Lake, the editorial director of HarperCollins Children's Books, who proclaimed that "Garner is, quite simply, one of the greatest and most influential writers this country has ever produced." Emma Donoghue recalls reading Red Shift as a teenager: "It looked like other Garners I had read: a children's fantasy. But Red Shift, with its passionately bickering adolescent lovers and vertiginous plunges through the wormhole of time, shook me to my core every time I read it, and still does... Garner makes the past numinous, terrifyingly real: anything but passed." Awards The biennial Hans Christian Andersen Award conferred by the International Board on Books for Young People is the highest recognition available to a writer or illustrator of children's books. Garner was the sole runner-up for the writing award in 1978. Garner was appointed Officer of the Order of the British Empire (OBE) for services to literature in the 2001 New Year's Honours list. He received the British Fantasy Society's occasional Karl Edward Wagner Award in 2003 and the World Fantasy Award for Life Achievement in 2012. In January 2011, the University of Warwick awarded the degree of Doctor of Letters (honoris causa). On that occasion he gave a half-hour interview about his work. He has also been awarded honorary doctorates from the University of Salford (2011) and the University of Huddersfield in (2012). He has been recognised several times for particular works. The Owl Service (1967) won both the Carnegie Medal and the Guardian Children's Fiction Prize, For the 70th anniversary of the Carnegie in 2007 it was named one of the top ten Medal-winning works, selected by a panel to compose the ballot for a public election of the all-time favourite. The Weirdstone of Brisingamen (1960) was named to the Lewis Carroll Shelf Award list by the University of Wisconsin–Madison School of Education in 1970, denoting that it "belongs on the same shelf" with the 1865 classic Alice in Wonderland and its sequel. The Stone Book (1976), first in the Stone Book series, won the 1996 Phoenix Award as the best English-language children's book that did not win a major award when it was originally published twenty years earlier. The 1981 film Images won First Prize at the Chicago International Film Festival Treacle Walker was shortlisted for the 2022 Booker Prize, making Garner the oldest writer nominated at the time. Television, radio, and other adaptations The Weirdstone of Brisingamen was dramatised in 6 30-minute parts by Nan Macdonald for the BBC's Home Service broadcast in November 1963. Elidor was read in instalments by John Stride for the BBC's Jackanory programme in June 1968. The Owl Service (1969), a British TV series transmitted by Granada Television based on Garner's novel of the same name. A second adaptation of Elidor was read on a BBC Radio 4 in July 1972. Red Shift (BBC, transmitted 17 January 1978); directed by John Mackenzie; part of the BBC's Play for Today series. To Kill a King (1980), part of the BBC series of plays on supernatural themes, Leap in the Dark: an atmospheric story about a writer overcoming depression and writer's block. The hero's home appears to be Garner's own house. The Keeper (ITV, transmitted 13 June 1983), an episode of the ITV children's series Dramarama: Spooky series Garner and Don Webb adapted Elidor as a BBC children's television series shown in 1995, comprising six half-hour episodes, starring Damian Zuk as Roland and Suzanne Shaw as Helen. The Owl Service was adapted for the stage in 2004 by The Drum Theatre in Plymouth. Elidor was dramatised as a radio play in four-parts by Don Webb, broadcast on BBC Radio 4 Extra in 2011. Works Novels The Weirdstone of Brisingamen, 1960 The Moon of Gomrath, 1963 Elidor, 1965 The Owl Service, 1967 Red Shift, 1973 Strandloper, 1996 Thursbitch, 2003 Boneland, 2012 Treacle Walker, 2021 Short story collections The Hamish Hamilton Book of Goblins, 1969 The Guizer: A Book of Fools, 1975 The Stone Book Quartet, 1979 The Lad of the Gad, 1980 Fairytales of Gold, 1980, (Illustrated by Michael Foreman). Book of British Fairy Tales, 1984, (Illustrated by Derek Collard). A Bag of Moonshine, 1986, (Illustrated by P. J. Lynch). Once Upon a Time, 1993 Collected Folk Tales, 2011 Other books Holly from the Bongs: A Nativity Play, 1966 The Old Man of Mow, 1967 The Breadhorse, 1975 Jack and the Beanstalk, 1992, (Illustrated by Julek Heller). The Little Red Hen, 1997 The Well of the Wind, 1998 Grey Wolf, Prince Jack and the Firebird, 1998 The Voice That Thunders, 1997 Where Shall We Run To?, 2018 See also References Footnotes Sources Further reading External links Alan Garner coverage by The Guardian'' Alan Garner papers at the University of Oregon Special Collections and University Archives English short story writers English children's writers English fantasy writers Carnegie Medal in Literature winners Fellows of the Royal Society of Literature Guardian Children's Fiction Prize winners Officers of the Order of the British Empire Alumni of Magdalen College, Oxford People educated at Manchester Grammar School People from Alderley Edge People from Congleton People with bipolar disorder World Fantasy Award-winning writers 1934 births Living people English male novelists	7
Accordions (from 19th-century German , from —"musical chord, concord of sounds") are a family of box-shaped musical instruments of the bellows-driven free reed aerophone type (producing sound as air flows past a reed in a frame). The essential characteristic of the accordion is to combine in one instrument a melody section, also called the diskant, usually on the right-hand keyboard, with an accompaniment or Basso continuo functionality on the left-hand. The musician normally plays the melody on buttons or keys on the right-hand side (referred to as the keyboard or sometimes the manual), and the accompaniment on bass or pre-set chord buttons on the left-hand side. A person who plays the accordion is called an accordionist. The accordion belongs to the free-reed aerophone family. Other instruments in this family include the concertina, harmonica, and bandoneon. The concertina and bandoneon do not have the melody–accompaniment duality. The harmoneon is also related and, while having the descant vs. melody dualism, tries to make it less pronounced. The harmonium and American reed organ are in the same family, but are typically larger than an accordion and sit on a surface or the floor. The accordion is played by compressing or expanding the bellows while pressing buttons or keys, causing pallets to open, which allow air to flow across strips of brass or steel, called reeds. These vibrate to produce sound inside the body. Valves on opposing reeds of each note are used to make the instrument's reeds sound louder without air leaking from each reed block. The accordion is widely spread across the world because of the waves of migration from Europe to the Americas and other regions. In some countries (for example: Argentina, Brazil, Colombia, the Dominican Republic, Mexico, and Panama) it is used in popular music (for example: chamamé in Argentina; gaucho, forró, and sertanejo in Brazil; vallenato in Colombia; merengue in the Dominican Republic; and norteño in Mexico), whereas in other regions (such as Europe, North America, and other countries in South America) it tends to be more used for dance-pop and folk music. In Europe and North America, some popular music acts also make use of the instrument. Additionally, the accordion is used in cajun, zydeco, jazz, and klezmer music, and in both solo and orchestral performances of classical music. Many conservatories in Europe have classical accordion departments. The oldest name for this group of instruments is harmonika, from the Greek , meaning "harmonic, musical". Today, native versions of the name accordion are more common. These names refer to the type of accordion patented by Cyrill Demian, which concerned "automatically coupled chords on the bass side". History The accordion's basic form is believed to have been invented in Berlin, in 1822, by Christian Friedrich Ludwig Buschmann, although one instrument was discovered in 2006 that appears to have been built earlier. The earliest history of the accordion in Russia is poorly documented. Nevertheless, according to Russian researchers, the earliest known simple accordions were made in Tula, Russia, by Ivan Sizov and Timofey Vorontsov around 1830, after they received an early accordion from Germany. By the late 1840s, the instrument was already very widespread;<ref>[http://publ.lib.ru/ARCHIVES/__Raritetnye_knigi/IRGO_Etnograficheskij_sbornik_02_1854.pdf Etnograficheskii sbornik Russkogo geograficheskogo obshchestva. Vol. 2] , Saint Petersburg, 1854. pp. 26, 162.</ref> together the factories of the two masters were producing 10,000 instruments a year. By 1866, over 50,000 instruments were being produced yearly by Tula and neighbouring villages, and by 1874 the yearly production was over 700,000. By the 1860s, Novgorod, Vyatka and Saratov governorates also had significant accordion production. By the 1880s, the list included Oryol, Ryazan, Moscow, Tver, Vologda, Kostroma, Nizhny Novgorod and Simbirsk, and many of these places created their own varieties of the instrument. The accordion is one of several European inventions of the early 19th century that use free reeds driven by a bellows. An instrument called accordion was first patented in 1829 by Cyrill Demian, of Armenian origin, in Vienna. Demian's instrument bore little resemblance to modern instruments. It only had a left hand buttonboard, with the right hand simply operating the bellows. One key feature for which Demian sought the patent was the sounding of an entire chord by depressing one key. His instrument also could sound two different chords with the same key, one for each bellows direction (a bisonoric action). At that time in Vienna, mouth harmonicas with Kanzellen (chambers) had already been available for many years, along with bigger instruments driven by hand bellows. The diatonic key arrangement was also already in use on mouth-blown instruments. Demian's patent thus covered an accompanying instrument: an accordion played with the left hand, opposite to the way that contemporary chromatic hand harmonicas were played, small and light enough for travelers to take with them and used to accompany singing. The patent also described instruments with both bass and treble sections, although Demian preferred the bass-only instrument owing to its cost and weight advantages. The accordion was introduced from Germany into Britain in about the year 1828. The instrument was noted in The Times in 1831 as one new to British audiences and was not favourably reviewed, but nevertheless it soon became popular. It had also become popular with New Yorkers by the mid-1840s. After Demian's invention, other accordions appeared, some featuring only the right-handed keyboard for playing melodies. It took English inventor Charles Wheatstone to bring both chords and keyboard together in one squeezebox. His 1844 patent for what he called a concertina also featured the ability to easily tune the reeds from the outside with a simple tool. The Austrian musician Adolf Müller described a great variety of instruments in his 1854 book . At the time, Vienna and London had a close musical relationship, with musicians often performing in both cities in the same year, so it is possible that Wheatstone was aware of this type of instrument and may have used them to put his key-arrangement ideas into practice. Jeune's flutina resembles Wheatstone's concertina in internal construction and tone colour, but it appears to complement Demian's accordion functionally. The flutina is a one-sided bisonoric melody-only instrument whose keys are operated with the right hand while the bellows is operated with the left. When the two instruments are combined, the result is quite similar to diatonic button accordions still manufactured today. Further innovations followed and continue to the present. Various buttonboard and keyboard systems have been developed, as well as voicings (the combination of multiple tones at different octaves), with mechanisms to switch between different voices during performance, and different methods of internal construction to improve tone, stability and durability. Modern accordions may incorporate electronics such as condenser microphones and tone and volume controls, so that the accordion can be plugged into a PA system or keyboard amplifier for live shows. Some 2010s-era accordions may incorporate MIDI sensors and circuitry, enabling the accordion to be plugged into a synth module and produce accordion sounds or other synthesized instrument sounds, such as piano or organ. Construction Accordions have many configurations and types. What may be easy to do with one type of accordion could be technically challenging or impossible with another, and proficiency with one layout may not translate to another. The most obvious difference between accordions is their right-hand sides. Piano accordions use a piano-style musical keyboard; button accordions use a buttonboard. Button accordions are furthermore differentiated by their usage of a chromatic or diatonic buttonboard for the right-hand side. Accordions may be either bisonoric, producing different pitches depending on the direction of bellows movement, or unisonoric, producing the same pitch in both directions. Piano accordions are unisonoric. Chromatic button accordions also tend to be unisonoric, while diatonic button accordions tend to be bisonoric, though notable exceptions exist. Accordion size is not standardized, and may vary significantly from model to model. Accordions vary not only in their dimensions and weight, but also in number of buttons or keys present in the right- and left-hand keyboards. For example, piano accordions may have as few as 8 bass buttons (two rows of four), or up to 140 (seven rows of twenty) or beyond. Accordions also vary by their available registers and by their specific tuning and voicing. Despite these differences, all accordions share a number of common components. Universal components Bellows The bellows is the most recognizable part of the instrument, and the primary means of articulation. The production of sound in an accordion is in direct proportion to the motion of the bellows by the player. In a sense, the role of the bellows can be compared to the role of moving a violin's bow on bowed strings. For a more direct analogy, the bellows can be compared to the role of breathing for a singer. The bellows is located between the right- and left-hand keyboards, and is made from pleated layers of cloth and cardboard, with added leather and metal. It is used to create pressure and vacuum, driving air across the internal reeds and producing sound by their vibrations, applied pressure increases the volume. The keyboard touch is not expressive and does not affect dynamics: all expression is effected through the bellows. Bellows effects include: Volume control, including swells and fades Repeated short, rapid changes of direction ("bellows shake"), which has been popularized by musicians such as Renato Borghetti (gaucho music) and Luiz Gonzaga, and extensively used in Forró, called resfulego in Brazil Constant bellows motion while applying pressure at intervals Constant bellows motion to produce clear tones with no resonance Subtly changing the intonation to mimic the expressiveness of a singer Using the bellows with the silent air button gives the sound of air moving ("whooshing"), which is sometimes used in contemporary compositions for this instrument Body The accordion's body consists of two boxes, commonly made of wood, joined by the bellows. These boxes house reed chambers for the right- and left-hand keyboards. Each side has grilles in order to facilitate the transmission of air in and out of the instrument, and to allow the sound to project. The grille at the right-hand side is usually larger and is often shaped for decorative purposes. The right-hand keyboard is normally used for playing the melody and the left-hand one for playing the accompaniment; however, skilled players can reverse these roles and play melodies with the left hand. The size and weight of an accordion varies depending on its type, layout and playing range, which can be as small as to have only one or two rows of basses and a single octave on the right-hand keyboard, to the most common 120-bass accordion and through to large and heavy 160-bass free-bass converter models. Pallet mechanism The accordion is an aerophone. The keyboard mechanisms of the instrument either enable the air flow, or disable it: Variable components The term accordion covers a wide range of instruments, with varying components. All instruments have reed ranks of some format, apart from reedless digital accordions. Not all have switches to change registers or ranks, as some have only one treble register and one bass register. The most typical accordion is the piano accordion, which is used for many musical genres. Another type of accordion is the button accordion, which is used in musical traditions including Cajun, Conjunto and Tejano music, Swiss and Slovenian-Austro-German Alpine music, and Argentinian tango music. The Helikon-style accordion has multiple flared horns projecting out of the left side to strengthen the bass tone. The word "Helikon" refers to a deep-pitched tuba. Right-hand keyboard systems Different systems exist for the right-hand keyboard of an accordion, which is normally used for playing the melody (while it can also play chords). Some use a button layout arranged in one way or another, while others use a piano-style keyboard. Each system has different claimed benefits by those who prefer it. They are also used to define one accordion or another as a different "type": Chromatic button accordions and the bayan, a Russian variant, use a buttonboard where notes are arranged chromatically. Two major systems exist, referred to as the B-system and the C-system (there are also regional variants). Rarely, some chromatic button accordions have a decorative right-hand keyboard in addition to the rows of buttons, an approach used by the virtuoso accordionist Pietro Frosini. Diatonic button accordions use a buttonboard designed around the notes of diatonic scales in a small number of keys. The keys are often arranged in one row for each key available. Chromatic scales may be available by combining notes from different rows. The adjective "diatonic" is also commonly used to describe bisonic or bisonoric accordions—that is, instruments whose right-hand (and in some instances even bass) keys each sound two different notes depending on the direction of the bellows (for instance, producing major triad sequences while closing the bellows and dominant seventh or 7–9 while opening). Such is the case, for instance, with the Argentinian bandoneon, the Slovenian-Austro-German Steirische Harmonika, the Czech Heligonka Harmonika, the Italian organetto, the Swiss Schwyzerörgeli and the Anglo concertina. Piano accordions use a musical keyboard similar to a piano, at right angles to the cabinet, the tops of the keys inward toward the bellows. The rarely used bass accordion has only a right-hand keyboard, with ranks of 8', 16', and 32' reeds, with the lowest note being the deepest pitch on a pipe organ pedal keyboard (pedal C). It is intended for performing basslines in accordion orchestras. The rarely used piccolo accordion also has only a right-hand keyboard. 6-plus-6 accordions use a buttonboard with three rows of buttons in a "uniform" or "whole-tone" arrangement, generally known as a Jankó keyboard. The chromatic scale consists of two rows. The third row is a repetition of the first row, so there is the same fingering in all twelve scales. These accordions are produced only in special editions e.g. the logicordion produced by Harmona. Left-hand keyboard systems Different systems are also in use for the left-hand keyboard, which is normally used for playing the accompaniment. These usually use distinct bass buttons and often have buttons with concavities or studs to help the player navigate the layout despite not being able to see the buttons while playing. There are three general categories: The Stradella bass system, also called standard bass, is arranged in a circle of fifths and uses single buttons for bass notes and additional rows of single buttons for preset major, minor, dominant seventh, and diminished chords. The dominant seventh and diminished chords are three-note chord voicings that omit the fifths of the chords. The Belgian bass system is a variation used in Belgian chromatic accordions. It is also arranged in a circle of fifths but in reverse order. This system has three rows of basses, three rows of chord buttons allowing easier fingering for playing melodies, combined chords, better use of fingers one and five, and more space between the buttons. This system was rarely used outside of its native Belgium. Various free-bass systems for greater access to playing melodies and complex basslines on the left-hand keyboard and to forming one's own chords note-by-note. These are often chosen for playing jazz and classical music. Some models can convert between free-bass and Stradella bass; this is called converter bass. The free-bass left hand notes are arranged chromatically in three rows with one additional duplicate row of buttons. Luttbeg double-keyboard piano accordions have a piano keyboard layout on both the treble and bass sides. This allows pianists, most notably Duke Ellington, to double up on the accordion without difficulty. The Bercandeon is an improved version of that instrument, also making it a "keyboard bandoneon". In 2021, a patent was published by Valerio Chiovarelli for a new bass system called the "Chiovarelli Jazz System". This system is a variation of the Stradella bass system where, instead of triads, the chordal buttons of this system produce bichords (chords with only 2 pitches instead of 3). The "Chiovarellia Jazz System" (or "CJS" for short) prioritizes the effectiveness of left hand accordion in jazz music, hence the name of the system, but its chordal combinations can be appliccable to many other genres according to the inventor. Reed ranks and switches Inside the accordion are the reeds that generate the instrument tones. These are organized in different sounding banks, which can be further combined into registers producing differing timbres. All but the smaller accordions are equipped with switches that control which combination of reed banks operate, organized from high to low registers. Each register stop produces a separate sound timbre, many of which also differ in octaves or in how different octaves are combined. See the accordion reed ranks and switches article for further explanation and audio samples. All but the smaller accordions usually have treble switches. The larger and more expensive accordions often also have bass switches to give options for the reed bank on the bass side. Classification of chromatic and piano type accordions In describing or pricing an accordion, the first factor is size, expressed in number of keys on either side. For a piano type, this could for one example be 37/96, meaning 37 treble keys (three octaves plus one note) on the treble side and 96 bass keys. A second aspect of size is the width of the white keys, which means that even accordions with the same number of keys have keyboards of different lengths, ranging from for a child's accordion to for an adult-sized instrument. After size, the price and weight of an accordion is largely dependent on the number of reed ranks on either side, either on a cassotto or not, and to a lesser degree on the number of combinations available through register switches. The next, but important, factor is the quality of the reeds, the highest grade called "a mano" (meaning "hand-made"), the next "tipo a mano" ("like hand-made"), lower grades including "export" and several more. Price is also affected by the use of costly woods, luxury decorations, and features such as a palm switch, grille mute, and so on. Some accordion makers sell a range of different models, from a less-expensive base model to a more costly luxury model. Typically, the register switches are described as Reeds: 5 + 3, meaning five reeds on the treble side and three on the bass, and Registers: 13 + M, 7, meaning 13 register buttons on the treble side plus a special "master" that activates all ranks, like the "tutti" or "full organ" switch on an organ, and seven register switches on the bass side. Another factor affecting the price is the presence of electronics, such as condenser microphones, volume and tone controls, or MIDI sensors and connections. Straps The larger piano and chromatic button accordions are usually heavier than other smaller squeezeboxes, and are equipped with two shoulder straps to make it easier to balance the weight and increase bellows control while sitting, and avoid dropping the instrument while standing. Other accordions, such as the diatonic button accordion, have only a single shoulder strap and a right hand thumb strap. All accordions have a (mostly adjustable) leather strap on the left-hand side to keep the player's hand in position while drawing the bellows. There are also straps above and below the bellows to keep it securely closed when the instrument is not being played. Electronic and digital In the 2010s, a range of electronic and digital accordions were introduced. They have an electronic sound module which creates the accordion sound, and most use MIDI systems to encode the keypresses and transmit them to the sound module. A digital accordion can have hundreds of sounds, which can include different types of accordions and even non-accordion sounds, such as pipe organ, piano, or guitar. Sensors are used on the buttons and keys, such as magnetic reed switches. Sensors are also used on the bellows to transmit the pushing and pulling of the bellows to the sound module. Digital accordions may have features not found in acoustic instruments, such as a piano-style sustain pedal, a modulation control for changing keys, and a portamento effect. As an electronic instrument, these types of accordions are plugged into a PA system or keyboard amplifier to produce sound. Some digital accordions have a small internal speaker and amplifier, so they can be used without a PA system or keyboard amplifier, at least for practicing and small venues like coffeehouses. One benefit of electronic accordions is that they can be practiced with headphones, making them inaudible to other people nearby. On a digital accordion, the volume of the right-hand keyboard and the left-hand buttons can be independently adjusted. Acoustic-digital hybrid accordions also exist. They are acoustic accordions (with reeds, bellows, and so on), but they also contain sensors, electronics, and MIDI connections, which provides a wider range of sound options. An acoustic-digital hybrid may be manufactured in this form, or it may be an acoustic accordion which has had aftermarket electronics sensors and connections added. Several companies sell aftermarket electronics kits, but they are typically installed by professional accordion technicians, because of the complex and delicate nature of the internal parts of an accordion. Unusual accordions Various hybrid accordions have been created between instruments of different buttonboards and actions. Many remain curiosities – only a few have remained in use: The Schrammel accordion, used in Viennese chamber music and klezmer, which has the treble buttonboard of a chromatic button accordion and a bisonoric bass buttonboard, similar to an expanded diatonic button accordion The Steirische Harmonika, a type of bisonoric diatonic button accordion particular to the Alpine folk music of Slovenia, Austria, the Czech Republic, the German state of Bavaria, and the Italian South Tyrol The schwyzerörgeli or Swiss organ, which usually has a three-row diatonic treble and 18 unisonoric bass buttons in a bass/chord arrangement – a subset of the Stradella system in reverse order like the Belgian bass – that travel parallel to the bellows motion The trikitixa of the Basque people, which has a two-row diatonic, bisonoric treble and a 12-button diatonic unisonoric bass The British chromatic accordion, the favoured diatonic accordion in Scotland. While the right hand is bisonoric, the left hand follows the Stradella system. The elite form of this instrument is generally considered the German manufactured Shand Morino, produced by Hohner with the input of Sir Jimmy Shand Pedal harmony, a type of accordion used sometimes in Polish folk music, which has a pair of pump organ-like bellows attached. The Finnish composer and accordionist Veli Kujala developed a quarter tone accordion together with the Italian accordion manufacturer Pigini in 2005, and has written works for it. It deploys the same system as the concert accordion, with a scale of five octaves, each divided into 24 quarter tones. Other notable composers who have written concertos for the quarter tone accordion include Jukka Tiensuu and Sampo Haapamäki. Manufacturing process The most expensive accordions are typically fully hand-made, particularly the reeds; completely hand-made reeds have a better tonal quality than even the best automatically manufactured ones. Some accordions have been modified by individuals striving to bring a more pure sound out of low-end instruments, such as the ones improved by Yutaka Usui, a Japanese craftsman. The manufacture of an accordion is only a partly automated process. In a sense, all accordions are handmade, since there is always some hand assembly of the small parts required. The general process involves making the individual parts, assembling the subsections, assembling the entire instrument, and final decorating and packaging. Notable centres of production are the Italian cities of Stradella and Castelfidardo, with many small and medium size manufacturers especially at the latter. Castelfidardo honours the memory of Paolo Soprani who was one of the first large-scale producers. Maugein Freres has built accordions in the French town of Tulle since 1919, and the company is now the last complete-process manufacturer of accordions in France. German companies such as Hohner and Weltmeister made large numbers of accordions, but production diminished by the end of the 20th century. Hohner still manufactures its top-end models in Germany, and Weltmeister instruments are still handmade by HARMONA Akkordeon GmbH in Klingenthal. Use in various music genres The accordion has traditionally been used to perform folk or ethnic music, popular music, and transcriptions from the operatic and light-classical music repertoire. It was also used by the Kikuyu tribe in Kenya and is the main instrument in the traditional Mwomboko dance. Today the instrument is sometimes heard in contemporary pop styles, such as rock and pop-rock, and occasionally even in serious classical music concerts, as well as advertisements. Use in traditional music The accordion's popularity spread rapidly: it has mostly been associated with the common people, and was propagated by Europeans who emigrated around the world. The accordion in both button and piano forms became a favorite of folk musicians and has been integrated into traditional music styles all over the world: see the list of music styles that incorporate the accordion. Use in jazz Notable jazz accordionists Early jazz accordionists include Charles Melrose, who recorded Wailing Blues/Barrel House Stomp (1930, Voc. 1503) with the Cellar Boys; Buster Moten, who played second piano and accordion in the Bennie Moten orchestra; and Jack Cornell, who did recordings with Irving Mills. Later jazz accordionists from the United States include Steve Bach, Milton DeLugg, Orlando DiGirolamo, Dominic Frontiere, Guy Klucevsek, Yuri Lemeshev, Frank Marocco, John Serry Sr., Lee Tomboulian, and Art Van Damme. French jazz accordionists include Richard Galliano, Bernard Lubat, and Vincent Peirani. Norwegian jazz accordionists include Asmund Bjørken, Stian Carstensen, Gabriel Fliflet, Frode Haltli, and Eivin One Pedersen. Left hand techniques The constraints of the Stradella bass system, limiting the left hand to preset chord buttons, is a barrier to some jazz chord conventions. Jazz accordionists expand the range of chord possibilities by using more than one chord button simultaneously, or by using combinations of a chord button and a bass note other than the typical root of the chord. An example of the former technique is used to play a minor seventh chord. To play an Am7(add9) chord, the Am and Em preset buttons are pressed simultaneously, along with an A bassnote. An example of the latter technique is used to play the half-diminished chord. To play an Eø7, a Gm preset button is pressed along with an E bassnote. For the left hand, the free-bass system is used in jazz as a means of creating complex chord voicings. Jazz harmony that would otherwise be difficult to replicate with the Stradella bass system, such as tritone substitutions, become more accessible using a free-bass accordion. Use in popular music The accordion appeared in popular music from the 1900s to the 1960s. This half-century is often called the "golden age of the accordion". Five players, Pietro Frosini, the two brothers Count Guido Deiro and Pietro Deiro and Slovenian brothers Vilko Ovsenik and Slavko Avsenik, Charles Magnante were major influences at this time. Most vaudeville theaters closed during the Great Depression, but accordionists during the 1930s–1950s taught and performed for radio. Included among this group was the concert virtuoso John Serry, Sr.Jacobson, Marion (2012). Squeeze This: A Cultural History of the Accordion in America. University of Illinois Press, Chicago, p. 61. During the 1950s through the 1980s the accordion received significant exposure on television with performances by Myron Floren on The Lawrence Welk Show. In the late 1950s and early 1960s, the accordion declined in popularity because of the rise of rock and roll. The first accordionist to appear and perform at the Newport Jazz Festival was Angelo DiPippo. He can be seen playing his accordion in the motion picture The Godfather. He also composed and performed with his accordion on part of the soundtrack of Woody Allen's movie To Rome With Love. He was featured twice on The Tonight Show with Johnny Carson. Richard Galliano is an internationally known accordionist whose repertoire covers jazz, tango nuevo, Latin, and classical. Some popular bands use the instrument to create distinctive sounds. A notable example is Grammy Award-winning parodist "Weird Al" Yankovic, who plays the accordion on many of his musical tracks, particularly his polkas. Yankovic was trained in the accordion as a child. The accordion has also been used in the rock genre, most notably by John Linnell of They Might Be Giants, featuring more prominently in the band's earlier works. The instrument is still frequently used during live performances, and continues to make appearances in their studio albums. Accordion is also used in the music of the Dropkick Murphys and Gogol Bordello. Accordionists in heavy metal music make their most extensive appearances in the folk metal subgenre, and are otherwise generally rare. Full-time accordionists in folk metal seem even rarer, but they are still utilized for studio work, as flexible keyboardists are usually more accessible for live performances. The Finnish symphonic folk-metal band Turisas used to have a full-time accordionist, employing classical and polka sensibilities alongside a violinist. One of their accordionists, Netta Skog, is now a member of Ensiferum, another folk-metal band. Another Finnish metal band, Korpiklaani, invokes a type of Finnish polka called humppa, and also has a full-time accordionist. Sarah Kiener, the former hurdy-gurdy player for the Swiss melodic-death-folk metal band Eluveitie, played a Helvetic accordion known as a zugerörgeli. Use in classical music Although best known as a folk instrument, it has grown in popularity among classical composers. The earliest surviving concert piece is , written in 1836 by Louise Reisner of Paris. Other composers, including the Russian Pyotr Ilyich Tchaikovsky, the Italian Umberto Giordano, and the American Charles Ives, wrote works for the diatonic button accordion. The first composer to write specifically for the chromatic accordion was Paul Hindemith. In 1922, the Austrian Alban Berg included an accordion in Wozzeck, Op. 7. In 1937, the first accordion concerto was composed in Russia. Other notable composers have written for the accordion during the first half of the 20th century. Included among this group was the Italian-American John Serry Sr., whose Concerto for Free Bass Accordion was completed in 1964.Accordion World, Bedford Hills, NY, 1968. In addition, the American accordionist Robert Davine composed his Divertimento for Flute, Clarinet, Bassoon and Accordion as a work for chamber orchestra. American composer William P. Perry featured the accordion in his orchestral suite Six Title Themes in Search of a Movie (2008). The experimental composer Howard Skempton began his musical career as an accordionist, and has written numerous solo works for it. In his work Drang (1999), British composer John Palmer pushed the expressive possibilities of the accordion/bayan. Luciano Berio wrote Sequenza XIII (1995) for accordionist Teodoro Anzellotti. Accordionists like Mogens Ellegaard, Joseph Macerollo, Nick Ariondo, Friedrich Lips, Hugo Noth, Stefan Hussong, Teodoro Anzellotti, and Geir Draugsvoll, encouraged composers to write new music for the accordion (solo and chamber music) and also started playing baroque music on the free bass accordion. French composer Henri Dutilleux used an accordion in both his late song cycles Correspondances (2003) and Le Temps l'Horloge (2009). Russian-born composer Sofia Gubaidulina has composed solos, concertos, and chamber works for accordion. Astor Piazzolla's concert tangos are performed widely. Piazzolla performed on the bandoneon, but his works are performed on either bandoneon or accordion. Australia The earliest mention of the novel accordion instrument in Australian music occurs in the 1830s. The accordion initially competed against cheaper and more convenient reed instruments such as mouth organ, concertina and melodeon. Frank Fracchia was an Australian accordion composer and copies of his works "My dear, can you come out tonight" and "Dancing with you" are preserved in Australian libraries. Other Australian composers who arranged music for accordion include Reginald Stoneham. The popularity of the accordion peaked in the late 1930s and continued until the 1950s. The accordion was particularly favoured by buskers. Bosnia and Herzegovina The accordion is a traditional instrument in Bosnia and Herzegovina. It is the dominant instrument used in sevdalinka, a traditional genre of folk music from Bosnia and Herzegovina. It is also considered a national instrument of the country. Brazil The accordion was brought to Brazil by settlers and immigrants from Europe, especially from Italy and Germany, who mainly settled in the south (Rio Grande do Sul, Santa Catarina and Paraná). The first instrument brought was a "Concertina" (a 120 button chromatic accordion). The instrument was popular in the 1950s, and it was common to find several accordions in the same house. There are many different configurations and tunes which were adapted from the cultures that came from Europe. Accordion is the official symbol instrument of the Rio Grande do Sul state, where was voted by unanimity in the deputy chamber. During the boom of accordions there were around 65 factories in Brazil, where most of them (52) in the south, in Rio Grande do Sul state, with only 7 outside the south. One of the most famous and genuinely Brazilian brands was Acordeões Todeschini from Bento Gonçalves-RS, closed in 1973. The Todeschini accordion is very appreciated today and survives with very few maintainers. The most notable musicians of button accordions are Renato Borghetti, Adelar Bertussi, Albino Manique and Edson Dutra. Compared to many other countries, the instrument is very popular in mainstream pop music. In some parts of the country, such as the northeast it is the most popular melodic instrument. As opposed to most European folk accordions, a very dry tuning is usually used in Brazil. Outside the south, the accordion (predominantly the piano accordion) is used in almost all styles of Forró (in particular in the subgenres of Xote and Baião) as the principal instrument, Luiz Gonzaga (the "King of the Baião") and Dominguinhos being among the notable musicians in this style from the northeast. In this musical style the typical combination is a trio of accordion, triangle and zabumba (a type of drum). This style has gained popularity recently, in particular among the student population of the southeast of the country (in the Forró Universitário genre, with important exponents today being Falamansa, and trios such as Trio Dona Zefa, Trio Virgulino and Trio Alvorada). Moreover, the accordion is the principal instrument in Junina music (music of the São João Festival), with Mario Zan having been a very important exponent of this music. It is an important instrument in Sertanejo (and Caipira) music, which originated in the midwest and southeast of Brazil, and subsequently has gained popularity throughout the country. Colombia The accordion is also a traditional instrument in Colombia, commonly associated with the vallenato and cumbia genres. The accordion has been used by tropipop musicians such as Carlos Vives, Andrés Cabas, Fonseca (singer) and Bacilos, as well as rock musicians such as Juanes and pop musicians as Shakira. Vallenato, who emerged in the early twentieth century in Valledupar, and have come to symbolize the folk music of Colombia. Every year in April, Colombia holds one of the most important musical festivals in the country: the Vallenato Legend Festival. The festival holds contests for best accordion player. Once every decade, the "King of Kings" accordion competition takes place, where winners of the previous festivals compete for the highest possible award for a vallenato accordion player: the Pilonera Mayor prize. This is the world's largest competitive accordion festival. Czech Republic Accordion is often played at traditional Czech pubs, such as U Flekú, Prague. Mexico Norteño heavily relies on the accordion; it is a genre related to polka. Ramón Ayala, known in Mexico as the "King of the Accordion", is a norteño musician. Cumbia, which features the accordion, is also popular with musicians such as Celso Piña, creating a more contemporary style. U.S.-born Mexican musician Julieta Venegas incorporates the sound of the instrument into rock, pop and folk. She was influenced by her fellow Chicanos Los Lobos who also use the music of the accordion. North Korea According to Barbara Demick in Nothing to Envy'', the accordion is known as "the people's instrument" and all North Korean teachers were expected to learn the accordion. China The number of accordionists in China exceeds every other country in the world, and possibly every country combined. Introduced in 1926, the accordion has risen to popularity in China throughout the years, thanks to Russian teachers and its being a popular instrument in the People's Liberation Army, and remains popular. Other audio samples See also List of accordionists Steirische Harmonika Confédération internationale des accordéonistes Notes References External links Folk music instruments Articles containing video clips German inventions 19th-century inventions	8
Artificial intelligence (AI) is the intelligence of machines or software, as opposed to the intelligence of humans or animals. It is also the field of study in computer science that develops and studies intelligent machines. "AI" may also refer to the machines themselves. AI technology is widely used throughout industry, government and science. Some high-profile applications are: advanced web search engines (e.g., Google Search), recommendation systems (used by YouTube, Amazon, and Netflix), understanding human speech (such as Siri and Alexa), self-driving cars (e.g., Waymo), generative or creative tools (ChatGPT and AI art), and competing at the highest level in strategic games (such as chess and Go). Artificial intelligence was founded as an academic discipline in 1956. The field went through multiple cycles of optimism followed by disappointment and loss of funding, but after 2012, when deep learning surpassed all previous AI techniques, there was a vast increase in funding and interest. The various sub-fields of AI research are centered around particular goals and the use of particular tools. The traditional goals of AI research include reasoning, knowledge representation, planning, learning, natural language processing, perception, and support for robotics. General intelligence (the ability to solve an arbitrary problem) is among the field's long-term goals. To solve these problems, AI researchers have adapted and integrated a wide range of problem-solving techniques, including search and mathematical optimization, formal logic, artificial neural networks, and methods based on statistics, operations research, and economics. AI also draws upon psychology, linguistics, philosophy, neuroscience and many other fields. Goals The general problem of simulating (or creating) intelligence has been broken down into sub-problems. These consist of particular traits or capabilities that researchers expect an intelligent system to display. The traits described below have received the most attention and cover the scope of AI research. Reasoning, problem-solving Early researchers developed algorithms that imitated step-by-step reasoning that humans use when they solve puzzles or make logical deductions. By the late 1980s and 1990s, methods were developed for dealing with uncertain or incomplete information, employing concepts from probability and economics. Many of these algorithms are insufficient for solving large reasoning problems because they experience a "combinatorial explosion": they became exponentially slower as the problems grew larger. Even humans rarely use the step-by-step deduction that early AI research could model. They solve most of their problems using fast, intuitive judgments. Accurate and efficient reasoning is an unsolved problem. Knowledge representation Knowledge representation and knowledge engineering allow AI programs to answer questions intelligently and make deductions about real-world facts. Formal knowledge representations are used in content-based indexing and retrieval, scene interpretation, clinical decision support, knowledge discovery (mining "interesting" and actionable inferences from large databases), and other areas. A knowledge base is a body of knowledge represented in a form that can be used by a program. An ontology is the set of objects, relations, concepts, and properties used by a particular domain of knowledge. Knowledge bases need to represent things such as: objects, properties, categories and relations between objects; situations, events, states and time; causes and effects; knowledge about knowledge (what we know about what other people know); default reasoning (things that humans assume are true until they are told differently and will remain true even when other facts are changing); and many other aspects and domains of knowledge. Among the most difficult problems in KR are: the breadth of commonsense knowledge (the set of atomic facts that the average person knows is enormous); and the sub-symbolic form of most commonsense knowledge (much of what people know is not represented as "facts" or "statements" that they could express verbally). Knowledge acquisition is the difficult problem of obtaining knowledge for AI applications. Modern AI gathers knowledge by "scraping" the internet (including Wikipedia). The knowledge itself was collected by the volunteers and professionals who published the information (who may or may not have agreed to provide their work to AI companies). This "crowd sourced" technique does not guarantee that the knowledge is correct or reliable. The knowledge of Large Language Models (such as ChatGPT) is highly unreliable -- it generates misinformation and falsehoods (known as "hallucinations"). Providing accurate knowledge for these modern AI applications is an unsolved problem. Planning and decision making An "agent" is anything that perceives and takes actions in the world. A rational agent has goals or preferences and takes actions to make them happen. In automated planning, the agent has a specific goal. In automated decision making, the agent has preferences – there are some situations it would prefer to be in, and some situations it is trying to avoid. The decision making agent assigns a number to each situation (called the "utility") that measures how much the agent prefers it. For each possible action, it can calculate the "expected utility": the utility of all possible outcomes of the action, weighted by the probability that the outcome will occur. It can then choose the action with the maximum expected utility. In classical planning, the agent knows exactly what the effect of any action will be. In most real-world problems, however, the agent may not be certain about the situation they are in (it is "unknown" or "unobservable") and it may not know for certain what will happen after each possible action (it is not "deterministic"). It must choose an action by making a probabilistic guess and then reassess the situation to see if the action worked. In some problems, the agent's preferences may be uncertain, especially if there are other agents or humans involved. These can be learned (e.g., with inverse reinforcement learning) or the agent can seek information to improve its preferences. Information value theory can be used to weigh the value of exploratory or experimental actions. The space of possible future actions and situations is typically intractably large, so the agents must take actions and evaluate situations while being uncertain what the outcome will be. A Markov decision process has a transition model that describes the probability that a particular action will change the state in a particular way, and a reward function that supplies the utility of each state and the cost of each action. A policy associates a decision with each possible state. The policy could be calculated (e.g. by iteration), be heuristic, or it can be learned. Game theory describes rational behavior of multiple interacting agents, and is used in AI programs that make decisions that involve other agents. Learning Machine learning is the study of programs that can improve their performance on a given task automatically. It has been a part of AI from the beginning. There are several kinds of machine learning. Unsupervised learning analyzes a stream of data and finds patterns and makes predictions without any other guidance. Supervised learning requires a human to label the input data first, and comes in two main varieties: classification (where the program must learn to predict what category the input belongs in) and regression (where the program must deduce a numeric function based on numeric input). In reinforcement learning the agent is rewarded for good responses and punished for bad ones. The agent learns to choose responses that are classified as "good". Transfer learning is when the knowledge gained from one problem is applied to a new problem. Deep learning is a type of machine learning that runs inputs through biologically inspired artificial neural networks for all of these types of learning. Computational learning theory can assess learners by computational complexity, by sample complexity (how much data is required), or by other notions of optimization. Natural language processing Natural language processing (NLP) allows programs to read, write and communicate in human languages such as English. Specific problems include speech recognition, speech synthesis, machine translation, information extraction, information retrieval and question answering. Early work, based on Noam Chomsky's generative grammar and semantic networks, had difficulty with word-sense disambiguation unless restricted to small domains called "micro-worlds" (due to the common sense knowledge problem). Modern deep learning techniques for NLP include word embedding (how often one word appears near another), transformers (which finds patterns in text), and others. In 2019, generative pre-trained transformer (or "GPT") language models began to generate coherent text, and by 2023 these models were able to get human-level scores on the bar exam, SAT, GRE, and many other real-world applications. Perception Machine perception is the ability to use input from sensors (such as cameras, microphones, wireless signals, active lidar, sonar, radar, and tactile sensors) to deduce aspects of the world. Computer vision is the ability to analyze visual input. The field includes speech recognition, image classification, facial recognition, object recognition, and robotic perception. Robotics Robotics uses AI. Social intelligence Affective computing is an interdisciplinary umbrella that comprises systems that recognize, interpret, process or simulate human feeling, emotion and mood. For example, some virtual assistants are programmed to speak conversationally or even to banter humorously; it makes them appear more sensitive to the emotional dynamics of human interaction, or to otherwise facilitate human–computer interaction. However, this tends to give naïve users an unrealistic conception of how intelligent existing computer agents actually are. Moderate successes related to affective computing include textual sentiment analysis and, more recently, multimodal sentiment analysis, wherein AI classifies the affects displayed by a videotaped subject. General intelligence A machine with artificial general intelligence should be able to solve a wide variety of problems with breadth and versatility similar to human intelligence. Tools AI research uses a wide variety of tools to accomplish the goals above. Search and optimization AI can solve many problems by intelligently searching through many possible solutions. There are two very different kinds of search used in AI: state space search and local search. State space search State space search searches through a tree of possible states to try to find a goal state. For example, Planning algorithms search through trees of goals and subgoals, attempting to find a path to a target goal, a process called means-ends analysis. Simple exhaustive searches are rarely sufficient for most real-world problems: the search space (the number of places to search) quickly grows to astronomical numbers. The result is a search that is too slow or never completes. "Heuristics" or "rules of thumb" can help to prioritize choices that are more likely to reach a goal. Adversarial search is used for game-playing programs, such as chess or Go. It searches through a tree of possible moves and counter-moves, looking for a winning position. Local search Local search uses mathematical optimization to find a numeric solution to a problem. It begins with some form of a guess and then refines the guess incrementally until no more refinements can be made. These algorithms can be visualized as blind hill climbing: we begin the search at a random point on the landscape, and then, by jumps or steps, we keep moving our guess uphill, until we reach the top. This process is called stochastic gradient descent. Evolutionary computation uses a form of optimization search. For example, they may begin with a population of organisms (the guesses) and then allow them to mutate and recombine, selecting only the fittest to survive each generation (refining the guesses). Distributed search processes can coordinate via swarm intelligence algorithms. Two popular swarm algorithms used in search are particle swarm optimization (inspired by bird flocking) and ant colony optimization (inspired by ant trails). Neural networks and statistical classifiers (discussed below), also use a form of local search, where the "landscape" to be searched is formed by learning. Logic Formal Logic is used for reasoning and knowledge representation. Formal logic comes in two main forms: propositional logic (which operates on statements that are true or false and uses logical connectives such as "and", "or", "not" and "implies") and predicate logic (which also operates on objects, predicates and relations and uses quantifiers such as "Every X is a Y" and "There are some Xs that are Ys"). Logical inference (or deduction) is the process of proving a new statement (conclusion) from other statements that are already known to be true (the premises). A logical knowledge base also handles queries and assertions as a special case of inference. An inference rule describes what is a valid step in a proof. The most general inference rule is resolution. Inference can be reduced to performing a search to find a path that leads from premises to conclusions, where each step is the application of an inference rule. Inference performed this way is intractable except for short proofs in restricted domains. No efficient, powerful and general method has been discovered. Fuzzy logic assigns a "degree of truth" between 0 and 1 and handles uncertainty and probabilistic situations. Non-monotonic logics are designed to handle default reasoning. Other specialized versions of logic have been developed to describe many complex domains (see knowledge representation above). Probabilistic methods for uncertain reasoning Many problems in AI (including in reasoning, planning, learning, perception, and robotics) require the agent to operate with incomplete or uncertain information. AI researchers have devised a number of tools to solve these problems using methods from probability theory and economics. Bayesian networks are a very general tool that can be used for many problems, including reasoning (using the Bayesian inference algorithm), learning (using the expectation-maximization algorithm), planning (using decision networks) and perception (using dynamic Bayesian networks). Probabilistic algorithms can also be used for filtering, prediction, smoothing and finding explanations for streams of data, helping perception systems to analyze processes that occur over time (e.g., hidden Markov models or Kalman filters). Precise mathematical tools have been developed that analyze how an agent can make choices and plan, using decision theory, decision analysis, and information value theory. These tools include models such as Markov decision processes, dynamic decision networks, game theory and mechanism design. Classifiers and statistical learning methods The simplest AI applications can be divided into two types: classifiers (e.g. "if shiny then diamond"), on one hand, and controllers (e.g. "if diamond then pick up"), on the other hand. Classifiers are functions that use pattern matching to determine the closest match. They can be fine-tuned based on chosen examples using supervised learning. Each pattern (also called an "observation") is labeled with a certain predefined class. All the observations combined with their class labels are known as a data set. When a new observation is received, that observation is classified based on previous experience. There are many kinds of classifiers in use. The decision tree is the simplest and most widely used symbolic machine learning algorithm. K-nearest neighbor algorithm was the most widely used analogical AI until the mid-1990s, and Kernel methods such as the support vector machine (SVM) displaced k-nearest neighbor in the 1990s. The naive Bayes classifier is reportedly the "most widely used learner" at Google, due in part to its scalability. Neural networks are also used as classifiers. Artificial neural networks Artificial neural networks were inspired by the design of the human brain: a simple "neuron" N accepts input from other neurons, each of which, when activated (or "fired"), casts a weighted "vote" for or against whether neuron N should itself activate. In practice, the input "neurons" are a list of numbers, the "weights" are a matrix, the next layer is the dot product (i.e., several weighted sums) scaled by an increasing function, such as the logistic function. "The resemblance to real neural cells and structures is superficial", according to Russell and Norvig. Learning algorithms for neural networks use local search to choose the weights that will get the right output for each input during training. The most common training technique is the backpropagation algorithm. Neural networks learn to model complex relationships between inputs and outputs and find patterns in data. In theory, a neural network can learn any function. In feedforward neural networks the signal passes in only one direction. Recurrent neural networks feed the output signal back into the input, which allows short-term memories of previous input events. Long short term memory is the most successful network architecture for recurrent networks. Perceptrons use only a single layer of neurons, deep learning uses multiple layers. Convolutional neural networks strengthen the connection between neurons that are "close" to each other – this is especially important in image processing, where a local set of neurons must identify an "edge" before the network can identify an object. Deep learning Deep learning uses several layers of neurons between the network's inputs and outputs. The multiple layers can progressively extract higher-level features from the raw input. For example, in image processing, lower layers may identify edges, while higher layers may identify the concepts relevant to a human such as digits or letters or faces. Deep learning has drastically improved the performance of programs in many important subfields of artificial intelligence, including computer vision, speech recognition, image classification and others. The reason that deep learning performs so well in so many applications is not known as of 2023. The sudden success of deep learning in 2012–2015 did not occur because of some new discovery or theoretical breakthrough (deep neural networks and backpropagation had been described by many people, as far back as the 1950s) but because of two factors: the incredible increase in computer power (including the hundred-fold increase in speed by switching to GPUs) and the availability of vast amounts of training data, especially the giant curated datasets used for benchmark testing, such as ImageNet. Specialized hardware and software In the late 2010s, graphics processing units (GPUs) that were increasingly designed with AI-specific enhancements and used with specialized TensorFlow software, had replaced previously used central processing unit (CPUs) as the dominant means for large-scale (commercial and academic) machine learning models' training. Historically, specialized languages, such as Lisp, Prolog, and others, had been used. Applications AI and machine learning technology is used in most of the essential applications of the 2020s, including: search engines (such as Google Search), targeting online advertisements, recommendation systems (offered by Netflix, YouTube or Amazon), driving internet traffic, targeted advertising (AdSense, Facebook), virtual assistants (such as Siri or Alexa), autonomous vehicles (including drones, ADAS and self-driving cars), automatic language translation (Microsoft Translator, Google Translate), facial recognition (Apple's Face ID or Microsoft's DeepFace and Google's FaceNet) and image labeling (used by Facebook, Apple's iPhoto and TikTok). There are also thousands of successful AI applications used to solve specific problems for specific industries or institutions. In a 2017 survey, one in five companies reported they had incorporated "AI" in some offerings or processes. A few examples are energy storage, medical diagnosis, military logistics, applications that predict the result of judicial decisions, foreign policy, or supply chain management. Game playing programs have been used since the 1950s to demonstrate and test AI's most advanced techniques. Deep Blue became the first computer chess-playing system to beat a reigning world chess champion, Garry Kasparov, on 11 May 1997. In 2011, in a Jeopardy! quiz show exhibition match, IBM's question answering system, Watson, defeated the two greatest Jeopardy! champions, Brad Rutter and Ken Jennings, by a significant margin. In March 2016, AlphaGo won 4 out of 5 games of Go in a match with Go champion Lee Sedol, becoming the first computer Go-playing system to beat a professional Go player without handicaps. Then it defeated Ke Jie in 2017, who at the time continuously held the world No. 1 ranking for two years. Other programs handle imperfect-information games; such as for poker at a superhuman level, Pluribus and Cepheus. DeepMind in the 2010s developed a "generalized artificial intelligence" that could learn many diverse Atari games on its own. In the early 2020s, generative AI gained widespread prominence. ChatGPT, based on GPT-3, and other large language models, were tried by 14% of Americans adults. The increasing realism and ease-of-use of AI-based text-to-image generators such as Midjourney, DALL-E, and Stable Diffusion sparked a trend of viral AI-generated photos. Widespread attention was gained by a fake photo of Pope Francis wearing a white puffer coat, the fictional arrest of Donald Trump, and a hoax of an attack on the Pentagon, as well as the usage in professional creative arts. AlphaFold 2 (2020) demonstrated the ability to approximate, in hours rather than months, the 3D structure of a protein. Ethics AI, like any powerful technology, has potential benefits and potential risks. AI may be able to advance science and find solutions for serious problems: Demis Hassabis of Deep Mind hopes to "solve intelligence, and then use that to solve everything else". However, as the use of AI has become widespread, several unintended consequences and risks have been identified. Risks and harm Privacy and copyright Machine learning algorithms require large amounts of data. The techniques used to acquire this data have raised concerns about privacy, surveillance and copyright. Technology companies collect a wide range of data from their users, including online activity, geolocation data, video and audio. For example, in order to build speech recognition algorithms, Amazon others have recorded millions of private conversations and allowed temps to listen to and transcribe some of them. Opinions about this widespread surveillance range from those who see it as a necessary evil to those for whom it is clearly unethical and a violation of the right to privacy. AI developers argue that this is the only way to deliver valuable applications. and have developed several techniques that attempt to preserve privacy while still obtaining the data, such as data aggregation, de-identification and differential privacy. Since 2016, some privacy experts, such as Cynthia Dwork, began to view privacy in terms of fairness -- Brian Christian wrote that experts have pivoted "from the question of 'what they know' to the question of 'what they're doing with it'.". Generative AI is often trained on unlicensed copyrighted works, including in domains such as images or computer code; the output is then used under a rationale of "fair use". Experts disagree about how well, and under what circumstances, this rationale will hold up in courts of law; relevant factors may include "the purpose and character of the use of the copyrighted work" and "the effect upon the potential market for the copyrighted work". In 2023, leading authors (including John Grisham and Jonathan Franzen) sued AI companies for using their work to train generative AI. Misinformation YouTube, Facebook and others use recommender systems to guide users to more content. These AI programs were given the goal of maximizing user engagement (that is, the only goal was to keep people watching). The AI learned that users tended to choose misinformation, conspiracy theories, and extreme partisan content, and, to keep them watching, the AI recommended more of it. Users also tended to watch more content on the same subject, so the AI led people into filter bubbles where they received multiple versions of the same misinformation. This convinced many users that the misinformation was true, and ultimately undermined trust in institutions, the media and the government. The AI program had correctly learned to maximize its goal, but the result was harmful to society. After the U.S. election in 2016, major technology companies took steps to mitigate the problem. In 2022, generative AI began to create images, audio, video and text that are indistinguishable from real photographs, recordings, films or human writing. It is possible for bad actors to use this technology to create massive amounts of misinformation or propaganda. This technology has been widely distributed at minimal cost. Geoffrey Hinton (who was an instrumental developer of these tools) expressed his concerns about AI disinformation. He quit his job at Google to freely criticize the companies developing AI. Algorithmic bias and fairness Machine learning applications will be biased if they learn from biased data. Anyone looking to use machine learning as part of real-world, in-production systems needs to factor ethics into their AI training processes and strive to avoid bias. This is especially true when using AI algorithms that are inherently unexplainable in deep learning. The developers may not be aware that the bias exists. Bias can be introduced by the way training data is selected and by the way a model is deployed. If a biased algorithm is used to make decisions that can seriously harm people (as it can in medicine, finance, recruitment, housing or policing) then the algorithm may cause discrimination. Fairness in machine learning is the study of how to prevent the harm caused by algorithmic bias. It has become serious area of academic study within AI. Researchers have discovered it is not always possible to define "fairness" in a way that satisfies all stakeholders. On June 28, 2015, Google Photos's new image labeling feature mistakenly identified Jacky Alcine and a friend as "gorillas" because they were black. The system was trained on a dataset that contained very few images of black people, a problem called "sample size disparity". Google "fixed" this problem by preventing the system from labelling anything as a "gorilla". Eight years later, in 2023, Google Photos still could not identify a gorilla, and neither could similar products from Apple, Facebook, Microsoft and Amazon. COMPAS is a commercial program widely used by U.S. courts to assess the likelihood of a defendant becoming a recidivist. In 2016, Julia Angwin at ProPublica discovered that COMPAS exhibited racial bias, despite the fact that the program was not told the races of the defendants. Although the error rate for both whites and blacks was calibrated equal at exactly 61%, the errors for each race were different -- the system consistently overestimated the chance that a black person would re-offend and would underestimate the chance that a white person would not re-offend. In 2017, several researchers showed that it was mathematically impossible for COMPAS to accommodate all possible measures of fairness when the base rates of re-offense were different for whites and blacks in the data. A program can make biased decisions even if the data does not explicitly mention a problematic feature (such as "race" or "gender"). The feature will correlate with other features (like "address", "shopping history" or "first name"), and the program will make the same decisions based on these features as it would on "race" or "gender". Moritz Hardt said “the most robust fact in this research area is that fairness through blindness doesn't work.” Criticism of COMPAS highlighted a deeper problem with the misuse of AI. Machine learning models are designed to make "predictions" that are only valid if we assume that the future will resemble the past. If they are trained on data that includes the results of racist decisions in the past, machine learning models must predict that racist decisions will be made in the future. Unfortunately, if an applications then uses these predictions as recommendations, some of these "recommendations" will likely be racist. Thus, machine learning is not well suited to help make decisions in areas where there is hope that the future will be better than the past. It is necessarily descriptive and not proscriptive. Bias and unfairness may go undetected because the developers are overwhelmingly white and male: among AI engineers, about 4% are black and 20% are women. At its 2022 Conference on Fairness, Accountability, and Transparency (ACM FAccT 2022) the Association for Computing Machinery, in Seoul, South Korea, presented and published findings recommending that until AI and robotics systems are demonstrated to be free of bias mistakes, they are unsafe and the use of self-learning neural networks trained on vast, unregulated sources of flawed internet data should be curtailed. Lack of transparency Most modern AI applications can not explain how they have reached a decision. The large amount of relationships between inputs and outputs in deep neural networks and resulting complexity makes it difficult for even an expert to explain how they produced their outputs, making them a black box. There have been many cases where a machine learning program passed rigorous tests, but nevertheless learned something different than what the programmers intended. For example, Justin Ko and Roberto Novoa developed a system that could identify skin diseases better than medical professionals, however it classified any image with a ruler as "cancerous", because pictures of malignancies typically include a ruler to show the scale. A more dangerous example was discovered by Rich Caruana in 2015: a machine learning system that accurately predicted risk of death classified a patient that was over 65, asthma and difficulty breathing as "low risk". Further research showed that in high-risk cases like this, the hospital would allocate more resources and save the patient's life, decreasing the risk measured by the program. Mistakes like these become obvious when we know how the program has reached a decision. Without an explanation, these problems may not not be discovered until after they have caused harm. A second issue is that people who have been harmed by an algorithm's decision have a right to an explanation. Doctors, for example, are required to clearly and completely explain the reasoning behind any decision they make. Early drafts of the European Union's General Data Protection Regulation in 2016 included an explicit statement that this right exists. Industry experts noted that this is an unsolved problem with no solution in sight. Regulators argued that nevertheless the harm is real: if the problem has no solution, the tools should not be used. DARPA established the XAI ("Explainable Artificial Intelligence") program in 2014 to try and solve these problems. There are several potential solutions to the transparency problem. Multitask learning provides a large number of outputs in addition to the target classification. These other outputs can help developers deduce what the network has learned. Deconvolution, DeepDream and other generative methods can allow developers to see what different layers of a deep network have learned and produce output that can suggest what the network is learning. Supersparse linear integer models use learning to identify the most important features, rather than the classification. Simple addition of these features can then make the classification (i.e. learning is used to create a scoring system classifier, which is transparent). Bad actors and weaponized AI A lethal autonomous weapon is a machine that locates, selects and engages human targets without human supervision. By 2015, over fifty countries were reported to be researching battlefield robots. These weapons are considered especially dangerous for several reasons: if they kill an innocent person it is not clear who should be held accountable, it is unlikely they will reliably choose targets, and, if produced at scale, they are potentially weapons of mass destruction. In 2014, 30 nations (including China) supported a ban on autonomous weapons under the United Nations' Convention on Certain Conventional Weapons, however the United States and others disagreed. AI provides a number of tools that are particularly useful for authoritarian governments: smart spyware, face recognition and voice recognition allow widespread surveillance; such surveillance allows machine learning to classify potential enemies of the state and can prevent them from hiding; recommendation systems can precisely target propaganda and misinformation for maximum effect; deepfakes and generative AI aid in producing misinformation; advanced AI can make authoritarian centralized decision making more competitive with liberal and decentralized systems such as markets. Terrorists, criminals and rogue states can use weaponized AI such as advanced digital warfare and lethal autonomous weapons. Machine-learning AI is also able to design tens of thousands of toxic molecules in a matter of hours. Technological unemployment From the early days of the development of artificial intelligence there have been arguments, for example those put forward by Weizenbaum, about whether tasks that can be done by computers actually should be done by them, given the difference between computers and humans, and between quantitative calculation and qualitative, value-based judgement. Economists have frequently highlighted the risks of redundancies from AI, and speculated about unemployment if there is no adequate social policy for full employment. In the past, technology has tended to increase rather than reduce total employment, but economists acknowledge that "we're in uncharted territory" with AI. A survey of economists showed disagreement about whether the increasing use of robots and AI will cause a substantial increase in long-term unemployment, but they generally agree that it could be a net benefit if productivity gains are redistributed. Risk estimates vary; for example, in the 2010s Michael Osborne and Carl Benedikt Frey estimated 47% of U.S. jobs are at "high risk" of potential automation, while an OECD report classified only 9% of U.S. jobs as "high risk". The methodology of speculating about future employment levels has been criticised as lacking evidential foundation, and for implying that technology (rather than social policy) creates unemployment (as opposed to redundancies). Unlike previous waves of automation, many middle-class jobs may be eliminated by artificial intelligence; The Economist stated in 2015 that "the worry that AI could do to white-collar jobs what steam power did to blue-collar ones during the Industrial Revolution" is "worth taking seriously". Jobs at extreme risk range from paralegals to fast food cooks, while job demand is likely to increase for care-related professions ranging from personal healthcare to the clergy. In April 2023, it was reported that 70% of the jobs for Chinese video game illlustrators had been eliminated by generative artificial intelligence. Existential risk It has been argued AI will become so powerful that humanity may irreversibly lose control of it. This could, as the physicist Stephen Hawking puts it, "spell the end of the human race". This scenario has been common in science fiction, when a computer or robot suddenly develops a human-like "self-awareness" (or "sentience" or "consciousness") and becomes a malevolent character. These sci-fi scenarios are misleading in several ways. First, AI does not require human-like "sentience" to be an existential risk. Modern AI programs are given specific goals and use learning and intelligence to achieve them. Philosopher Nick Bostrom argued that if one gives almost any goal to a sufficiently powerful AI, it may choose to destroy humanity to achieve it (he used the example of a paperclip factory manager). Stuart Russell gives the example of household robot that tries to find a way to kill its owner to prevent it from being unplugged, reasoning that "you can't fetch the coffee if you're dead." In order to be safe for humanity, a superintelligence would have to be genuinely aligned with humanity's morality and values so that it is "fundamentally on our side". Second, Yuval Noah Harari argues that AI does not require a robot body or physical control to pose an existential risk. The essential parts of civilization are not physical. Things like ideologies, law, government, money and the economy are made of language; they exist because there are stories that billions of people believe. The current prevalence of misinformation suggests that an AI could use language to convince people to believe anything, even to take actions that are destructive. The opinions amongst experts and industry insiders are mixed, with sizable fractions both concerned and unconcerned by risk from eventual superintelligent AI. Personalities such as Stephen Hawking, Bill Gates, Elon Musk have expressed concern about existential risk from AI. In the early 2010's, experts argued that the risks are too distant in the future to warrant research or that humans will be valuable from the perspective of a superintelligent machine. However, after 2016, the study of current and future risks and possible solutions became a serious area of research. In 2023, AI pioneers including Geoffrey Hinton, Yoshua Bengio, Demis Hassabis, and Sam Altman issued the joint statement that "Mitigating the risk of extinction from AI should be a global priority alongside other societal-scale risks such as pandemics and nuclear war". Ethical machines and alignment Friendly AI are machines that have been designed from the beginning to minimize risks and to make choices that benefit humans. Eliezer Yudkowsky, who coined the term, argues that developing friendly AI should be a higher research priority: it may require a large investment and it must be completed before AI becomes an existential risk. Machines with intelligence have the potential to use their intelligence to make ethical decisions. The field of machine ethics provides machines with ethical principles and procedures for resolving ethical dilemmas. The field of machine ethics is also called computational morality, and was founded at an AAAI symposium in 2005. Other approaches include Wendell Wallach's "artificial moral agents" and Stuart J. Russell's three principles for developing provably beneficial machines. Regulation The regulation of artificial intelligence is the development of public sector policies and laws for promoting and regulating artificial intelligence (AI); it is therefore related to the broader regulation of algorithms. The regulatory and policy landscape for AI is an emerging issue in jurisdictions globally. According to AI Index at Stanford, the annual number of AI-related laws passed in the 127 survey countries jumped from one passed in 2016 to 37 passed in 2022 alone. Between 2016 and 2020, more than 30 countries adopted dedicated strategies for AI. Most EU member states had released national AI strategies, as had Canada, China, India, Japan, Mauritius, the Russian Federation, Saudi Arabia, United Arab Emirates, US and Vietnam. Others were in the process of elaborating their own AI strategy, including Bangladesh, Malaysia and Tunisia. The Global Partnership on Artificial Intelligence was launched in June 2020, stating a need for AI to be developed in accordance with human rights and democratic values, to ensure public confidence and trust in the technology. Henry Kissinger, Eric Schmidt, and Daniel Huttenlocher published a joint statement in November 2021 calling for a government commission to regulate AI. In 2023, OpenAI leaders published recommendations for the governance of superintelligence, which they believe may happen in less than 10 years. In a 2022 Ipsos survey, attitudes towards AI varied greatly by country; 78% of Chinese citizens, but only 35% of Americans, agreed that "products and services using AI have more benefits than drawbacks". A 2023 Reuters/Ipsos poll found that 61% of Americans agree, and 22% disagree, that AI poses risks to humanity. In a 2023 Fox News poll, 35% of Americans thought it "very important", and an additional 41% thought it "somewhat important", for the federal government to regulate AI, versus 13% responding "not very important" and 8% responding "not at all important". History The study of mechanical or "formal" reasoning began with philosophers and mathematicians in antiquity. The study of logic led directly to Alan Turing's theory of computation, which suggested that a machine, by shuffling symbols as simple as "0" and "1", could simulate both mathematical deduction and formal reasoning, which is known as the Church–Turing thesis. This, along with concurrent discoveries in cybernetics and information theory, led researchers to consider the possibility of building an "electronic brain". The first paper later recognized as "AI" was McCullouch and Pitts design for Turing-complete "artificial neurons" in 1943. The field of AI research was founded at a workshop at Dartmouth College in 1956. The attendees became the leaders of AI research in the 1960s. They and their students produced programs that the press described as "astonishing": computers were learning checkers strategies, solving word problems in algebra, proving logical theorems and speaking English. By the middle of the 1960s, research in the U.S. was heavily funded by the Department of Defense and laboratories had been established around the world. Herbert Simon predicted, "machines will be capable, within twenty years, of doing any work a man can do". Marvin Minsky agreed, writing, "within a generation ... the problem of creating 'artificial intelligence' will substantially be solved". They had, however, underestimated the difficulty of the problem. Both the U.S. and British governments cut off exploratory research in response to the criticism of Sir James Lighthill and ongoing pressure from the US Congress to fund more productive projects. Minsky's and Papert's book Perceptrons was understood as proving that artificial neural networks approach would never be useful for solving real-world tasks, thus discrediting the approach altogether. The "AI winter", a period when obtaining funding for AI projects was difficult, followed. In the early 1980s, AI research was revived by the commercial success of expert systems, a form of AI program that simulated the knowledge and analytical skills of human experts. By 1985, the market for AI had reached over a billion dollars. At the same time, Japan's fifth generation computer project inspired the U.S. and British governments to restore funding for academic research. However, beginning with the collapse of the Lisp Machine market in 1987, AI once again fell into disrepute, and a second, longer-lasting winter began. Many researchers began to doubt that the current practices would be able to imitate all the processes of human cognition, especially perception, robotics, learning and pattern recognition. A number of researchers began to look into "sub-symbolic" approaches. Robotics researchers, such as Rodney Brooks, rejected "representation" in general and focussed directly on engineering machines that move and survive.. Judea Pearl, Lofti Zadeh and others developed methods that handled incomplete and uncertain information by making reasonable guesses rather than precise logic. But the most important development was the revival of "connectionism", including neural network research, by Geoffrey Hinton and others. In 1990, Yann LeCun successfully showed that convolutional neural networks can recognize handwritten digits, the first of many successful applications of neural networks. AI gradually restored its reputation in the late 1990s and early 21st century by exploiting formal mathematical methods and by finding specific solutions to specific problems. This "narrow" and "formal" focus allowed researchers to produce verifiable results and collaborate with other fields (such as statistics, economics and mathematics). By 2000, solutions developed by AI researchers were being widely used, although in the 1990s they were rarely described as "artificial intelligence". Several academic researchers became concerned that AI was no longer pursuing the original goal of creating versatile, fully intelligent machines. Beginning around 2002, they founded the subfield of artificial general intelligence (or "AGI"), which had several well-funded institutions by the 2010s. Deep learning began to dominate industry benchmarks in 2012 and was adopted throughout the field. For many specific tasks, other methods were abandoned. Deep learning's success was based on both hardware improvements (faster computers, graphics processing units, cloud computing) and access to large amounts of data (including curated datasets, such as ImageNet). Deep learning's success led to an enormous increase in interest and funding in AI. The amount of machine learning research (measured by total publications) increased by 50% in the years 2015–2019, and WIPO reported that AI was the most prolific emerging technology in terms of the number of patent applications and granted patents According to 'AI Impacts', about $50 billion annually was invested in "AI" around 2022 in the US alone and about 20% of new US Computer Science PhD graduates have specialized in "AI"; about 800,000 "AI"-related US job openings existed in 2022. In 2016, issues of fairness and the misuse of technology were catapulted into center stage at machine learning conferences, publications vastly increased, funding became available, and many researchers re-focussed their careers on these issues. The alignment problem became a serious field of academic study. Philosophy Defining artificial intelligence Alan Turing wrote in 1950 "I propose to consider the question 'can machines think'?" He advised changing the question from whether a machine "thinks", to "whether or not it is possible for machinery to show intelligent behaviour". He devised the Turing test, which measures the ability of a machine to simulate human conversation. Since we can only observe the behavior of the machine, it does not matter if it is "actually" thinking or literally has a "mind". Turing notes that we can not determine these things about other people but "it is usual to have a polite convention that everyone thinks" Russell and Norvig agree with Turing that AI must be defined in terms of "acting" and not "thinking". However, they are critical that the test compares machines to people. "Aeronautical engineering texts," they wrote, "do not define the goal of their field as making 'machines that fly so exactly like pigeons that they can fool other pigeons. AI founder John McCarthy agreed, writing that "Artificial intelligence is not, by definition, simulation of human intelligence". McCarthy defines intelligence as "the computational part of the ability to achieve goals in the world." Another AI founder, Marvin Minsky similarly defines it as "the ability to solve hard problems". These definitions view intelligence in terms of well-defined problems with well-defined solutions, where both the difficulty of the problem and the performance of the program are direct measures of the "intelligence" of the machine—and no other philosophical discussion is required, or may not even be possible. Another definition has been adopted by Google, a major practitioner in the field of AI. This definition stipulates the ability of systems to synthesize information as the manifestation of intelligence, similar to the way it is defined in biological intelligence. Evaluating approaches to AI No established unifying theory or paradigm has guided AI research for most of its history. The unprecedented success of statistical machine learning in the 2010s eclipsed all other approaches (so much so that some sources, especially in the business world, use the term "artificial intelligence" to mean "machine learning with neural networks"). This approach is mostly sub-symbolic, soft and narrow (see below). Critics argue that these questions may have to be revisited by future generations of AI researchers. Symbolic AI and its limits Symbolic AI (or "GOFAI") simulated the high-level conscious reasoning that people use when they solve puzzles, express legal reasoning and do mathematics. They were highly successful at "intelligent" tasks such as algebra or IQ tests. In the 1960s, Newell and Simon proposed the physical symbol systems hypothesis: "A physical symbol system has the necessary and sufficient means of general intelligent action." However, the symbolic approach failed on many tasks that humans solve easily, such as learning, recognizing an object or commonsense reasoning. Moravec's paradox is the discovery that high-level "intelligent" tasks were easy for AI, but low level "instinctive" tasks were extremely difficult. Philosopher Hubert Dreyfus had argued since the 1960s that human expertise depends on unconscious instinct rather than conscious symbol manipulation, and on having a "feel" for the situation, rather than explicit symbolic knowledge. Although his arguments had been ridiculed and ignored when they were first presented, eventually, AI research came to agree. The issue is not resolved: sub-symbolic reasoning can make many of the same inscrutable mistakes that human intuition does, such as algorithmic bias. Critics such as Noam Chomsky argue continuing research into symbolic AI will still be necessary to attain general intelligence, in part because sub-symbolic AI is a move away from explainable AI: it can be difficult or impossible to understand why a modern statistical AI program made a particular decision. The emerging field of neuro-symbolic artificial intelligence attempts to bridge the two approaches. Neat vs. scruffy "Neats" hope that intelligent behavior is described using simple, elegant principles (such as logic, optimization, or neural networks). "Scruffies" expect that it necessarily requires solving a large number of unrelated problems. Neats defend their programs with theoretical rigor, scruffies rely mainly on incremental testing to see if they work. This issue was actively discussed in the 70s and 80s, but eventually was seen as irrelevant. Modern AI has elements of both. Soft vs. hard computing Finding a provably correct or optimal solution is intractable for many important problems. Soft computing is a set of techniques, including genetic algorithms, fuzzy logic and neural networks, that are tolerant of imprecision, uncertainty, partial truth and approximation. Soft computing was introduced in the late 80s and most successful AI programs in the 21st century are examples of soft computing with neural networks. Narrow vs. general AI AI researchers are divided as to whether to pursue the goals of artificial general intelligence and superintelligence directly or to solve as many specific problems as possible (narrow AI) in hopes these solutions will lead indirectly to the field's long-term goals. General intelligence is difficult to define and difficult to measure, and modern AI has had more verifiable successes by focusing on specific problems with specific solutions. The experimental sub-field of artificial general intelligence studies this area exclusively. Machine consciousness, sentience and mind The philosophy of mind does not know whether a machine can have a mind, consciousness and mental states, in the same sense that human beings do. This issue considers the internal experiences of the machine, rather than its external behavior. Mainstream AI research considers this issue irrelevant because it does not affect the goals of the field: to build machines that can solve problems using intelligence. Russell and Norvig add that "[t]he additional project of making a machine conscious in exactly the way humans are is not one that we are equipped to take on." However, the question has become central to the philosophy of mind. It is also typically the central question at issue in artificial intelligence in fiction. Consciousness David Chalmers identified two problems in understanding the mind, which he named the "hard" and "easy" problems of consciousness. The easy problem is understanding how the brain processes signals, makes plans and controls behavior. The hard problem is explaining how this feels or why it should feel like anything at all, assuming we are right in thinking that it truly does feel like something (Dennett's consciousness illusionism says this is an illusion). Human information processing is easy to explain, however, human subjective experience is difficult to explain. For example, it is easy to imagine a color-blind person who has learned to identify which objects in their field of view are red, but it is not clear what would be required for the person to know what red looks like. Computationalism and functionalism Computationalism is the position in the philosophy of mind that the human mind is an information processing system and that thinking is a form of computing. Computationalism argues that the relationship between mind and body is similar or identical to the relationship between software and hardware and thus may be a solution to the mind–body problem. This philosophical position was inspired by the work of AI researchers and cognitive scientists in the 1960s and was originally proposed by philosophers Jerry Fodor and Hilary Putnam. Philosopher John Searle characterized this position as "strong AI": "The appropriately programmed computer with the right inputs and outputs would thereby have a mind in exactly the same sense human beings have minds." Searle counters this assertion with his Chinese room argument, which attempts to show that, even if a machine perfectly simulates human behavior, there is still no reason to suppose it also has a mind. Robot rights If a machine has a mind and subjective experience, then it may also have sentience (the ability to feel), and if so it could also suffer; it has been argued that this could entitle it to certain rights. Any hypothetical robot rights would lie on a spectrum with animal rights and human rights. This issue has been considered in fiction for centuries, and is now being considered by, for example, California's Institute for the Future; however, critics argue that the discussion is premature. Future Superintelligence and the singularity A superintelligence is a hypothetical agent that would possess intelligence far surpassing that of the brightest and most gifted human mind. If research into artificial general intelligence produced sufficiently intelligent software, it might be able to reprogram and improve itself. The improved software would be even better at improving itself, leading to what I. J. Good called an "intelligence explosion" and Vernor Vinge called a "singularity". However, most technologies do not improve exponentially indefinitely, but rather follow an S-curve, slowing when they reach the physical limits of what the technology can do. Consider, for example, transportation: speed increased exponentially from 1830 to 1970, but then the trend abruptly stopped when it reached physical limits. Transhumanism Robot designer Hans Moravec, cyberneticist Kevin Warwick, and inventor Ray Kurzweil have predicted that humans and machines will merge in the future into cyborgs that are more capable and powerful than either. This idea, called transhumanism, has roots in Aldous Huxley and Robert Ettinger. Edward Fredkin argues that "artificial intelligence is the next stage in evolution", an idea first proposed by Samuel Butler's "Darwin among the Machines" as far back as 1863, and expanded upon by George Dyson in his book of the same name in 1998. In fiction Thought-capable artificial beings have appeared as storytelling devices since antiquity, and have been a persistent theme in science fiction. A common trope in these works began with Mary Shelley's Frankenstein, where a human creation becomes a threat to its masters. This includes such works as Arthur C. Clarke's and Stanley Kubrick's 2001: A Space Odyssey (both 1968), with HAL 9000, the murderous computer in charge of the Discovery One spaceship, as well as The Terminator (1984) and The Matrix (1999). In contrast, the rare loyal robots such as Gort from The Day the Earth Stood Still (1951) and Bishop from Aliens (1986) are less prominent in popular culture. Isaac Asimov introduced the Three Laws of Robotics in many books and stories, most notably the "Multivac" series about a super-intelligent computer of the same name. Asimov's laws are often brought up during lay discussions of machine ethics; while almost all artificial intelligence researchers are familiar with Asimov's laws through popular culture, they generally consider the laws useless for many reasons, one of which is their ambiguity. Several works use AI to force us to confront the fundamental question of what makes us human, showing us artificial beings that have the ability to feel, and thus to suffer. This appears in Karel Čapek's R.U.R., the films A.I. Artificial Intelligence and Ex Machina, as well as the novel Do Androids Dream of Electric Sheep?, by Philip K. Dick. Dick considers the idea that our understanding of human subjectivity is altered by technology created with artificial intelligence. See also Explanatory notes References AI textbooks The two most widely used textbooks in 2023. (See the Open Syllabus). These were the four the most widely used AI textbooks in 2008: . Later editions. History of AI . . Other sources was introduced by Kunihiko Fukushima in 1980. \| . Presidential Address to the Association for the Advancement of Artificial Intelligence. Later published as . AI & ML in Fusion AI & ML in Fusion, video lecture Further reading Autor, David H., "Why Are There Still So Many Jobs? The History and Future of Workplace Automation" (2015) 29(3) Journal of Economic Perspectives 3. Boden, Margaret, Mind As Machine, Oxford University Press, 2006. Cukier, Kenneth, "Ready for Robots? How to Think about the Future of AI", Foreign Affairs, vol. 98, no. 4 (July/August 2019), pp. 192–98. George Dyson, historian of computing, writes (in what might be called "Dyson's Law") that "Any system simple enough to be understandable will not be complicated enough to behave intelligently, while any system complicated enough to behave intelligently will be too complicated to understand." (p. 197.) Computer scientist Alex Pentland writes: "Current AI machine-learning algorithms are, at their core, dead simple stupid. They work, but they work by brute force." (p. 198.) Domingos, Pedro, "Our Digital Doubles: AI will serve our species, not control it", Scientific American, vol. 319, no. 3 (September 2018), pp. 88–93. Gertner, Jon. (2023) "Wikipedia's Moment of Truth: Can the online encyclopedia help teach A.I. chatbots to get their facts right — without destroying itself in the process?" New York Times Magazine (July 18, 2023) online Hughes-Castleberry, Kenna, "A Murder Mystery Puzzle: The literary puzzle Cain's Jawbone, which has stumped humans for decades, reveals the limitations of natural-language-processing algorithms", Scientific American, vol. 329, no. 4 (November 2023), pp. 81–82. "This murder mystery competition has revealed that although NLP (natural-language processing) models are capable of incredible feats, their abilities are very much limited by the amount of context they receive. This [...] could cause [difficulties] for researchers who hope to use them to do things such as analyze ancient languages. In some cases, there are few historical records on long-gone civilizations to serve as training data for such a purpose." (p. 82.) Johnston, John (2008) The Allure of Machinic Life: Cybernetics, Artificial Life, and the New AI, MIT Press. Gary Marcus, "Artificial Confidence: Even the newest, buzziest systems of artificial general intelligence are stymmied by the same old problems", Scientific American, vol. 327, no. 4 (October 2022), pp. 42–45. Introduced DQN, which produced human-level performance on some Atari games. Eka Roivainen, "AI's IQ: ChatGPT aced a [standard intelligence] test but showed that intelligence cannot be measured by IQ alone", Scientific American, vol. 329, no. 1 (July/August 2023), p. 7. "Despite its high IQ, ChatGPT fails at tasks that require real humanlike reasoning or an understanding of the physical and social world.... ChatGPT seemed unable to reason logically and tried to rely on its vast database of... facts derived from online texts." Ashish Vaswani, Noam Shazeer, Niki Parmar et al. "Attention is all you need." Advances in neural information processing systems 30 (2017). Seminal paper on transformers. External links Artificial Intelligence. BBC Radio 4 discussion with John Agar, Alison Adam & Igor Aleksander (In Our Time, 8 December 2005). Theranostics and AI—The Next Advance in Cancer Precision Medicine Artificial intelligence Cybernetics Computational neuroscience Computational fields of study Data science Emerging technologies Formal sciences Intelligence by type Unsolved problems in computer science	32
Anaximander ( ; Anaximandros; ) was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia (in modern-day Turkey). He belonged to the Milesian school and learned the teachings of his master Thales. He succeeded Thales and became the second master of that school where he counted Anaximenes and, arguably, Pythagoras amongst his pupils. Little of his life and work is known today. According to available historical documents, he is the first philosopher known to have written down his studies, although only one fragment of his work remains. Fragmentary testimonies found in documents after his death provide a portrait of the man. Anaximander was an early proponent of science and tried to observe and explain different aspects of the universe, with a particular interest in its origins, claiming that nature is ruled by laws, just like human societies, and anything that disturbs the balance of nature does not last long. Like many thinkers of his time, Anaximander's philosophy included contributions to many disciplines. In astronomy, he attempted to describe the mechanics of celestial bodies in relation to the Earth. In physics, his postulation that the indefinite (or apeiron) was the source of all things led Greek philosophy to a new level of conceptual abstraction. His knowledge of geometry allowed him to introduce the gnomon in Greece. He created a map of the world that contributed greatly to the advancement of geography. He was also involved in the politics of Miletus and was sent as a leader to one of its colonies. Biography Anaximander, son of Praxiades, was born in the third year of the 42nd Olympiad (610 BC). According to Apollodorus of Athens, Greek grammarian of the 2nd century BC, he was sixty-four years old during the second year of the 58th Olympiad (547–546 BC), and died shortly afterwards. Establishing a timeline of his work is now impossible, since no document provides chronological references. Themistius, a 4th-century Byzantine rhetorician, mentions that he was the "first of the known Greeks to publish a written document on nature." Therefore, his texts would be amongst the earliest written in prose, at least in the Western world. By the time of Plato, his philosophy was almost forgotten, and Aristotle, his successor Theophrastus and a few doxographers provide us with the little information that remains. However, we know from Aristotle that Thales, also from Miletus, precedes Anaximander. It is debatable whether Thales actually was the teacher of Anaximander, but there is no doubt that Anaximander was influenced by Thales' theory that everything is derived from water. One thing that is not debatable is that even the ancient Greeks considered Anaximander to be from the Monist school which began in Miletus, with Thales followed by Anaximander and which ended with Anaximenes. 3rd-century Roman rhetorician Aelian depicts Anaximander as leader of the Milesian colony to Apollonia on the Black Sea coast, and hence some have inferred that he was a prominent citizen. Indeed, Various History (III, 17) explains that philosophers sometimes also dealt with political matters. It is very likely that leaders of Miletus sent him there as a legislator to create a constitution or simply to maintain the colony's allegiance. Anaximander lived the final few years of his life as a subject of the Persian Achaemenid Empire. Theories Anaximander's theories were influenced by the Greek mythical tradition, and by some ideas of Thales – the father of Western philosophy – as well as by observations made by older civilizations in the Near East, especially Babylon. All these were developed rationally. In his desire to find some universal principle, he assumed, like traditional religion, the existence of a cosmic order; and his ideas on this used the old language of myths which ascribed divine control to various spheres of reality. This was a common practice for the Greek philosophers in a society which saw gods everywhere, and therefore could fit their ideas into a tolerably elastic system. Some scholars see a gap between the existing mythical and the new rational way of thought which is the main characteristic of the archaic period (8th to 6th century BC) in the Greek city-states. This has given rise to the phrase "Greek miracle". But there may not have been such an abrupt break as initially appears. The basic elements of nature (water, air, fire, earth) which the first Greek philosophers believed made up the universe in fact represent the primordial forces imagined in earlier ways of thinking. Their collision produced what the mythical tradition had called cosmic harmony. In the old cosmogonies – Hesiod (8th – 7th century BC) and Pherecydes (6th century BC) – Zeus establishes his order in the world by destroying the powers which were threatening this harmony (the Titans). Anaximander claimed that the cosmic order is not monarchic but geometric, and that this causes the equilibrium of the earth, which is lying in the centre of the universe. This is the projection on nature of a new political order and a new space organized around a centre which is the static point of the system in the society as in nature. In this space there is isonomy (equal rights) and all the forces are symmetrical and transferable. The decisions are now taken by the assembly of demos in the agora which is lying in the middle of the city. The same rational way of thought led him to introduce the abstract apeiron (indefinite, infinite, boundless, unlimited) as an origin of the universe, a concept that is probably influenced by the original Chaos (gaping void, abyss, formless state) from which everything else appeared in the mythical Greek cosmogony. It also takes notice of the mutual changes between the four elements. Origin, then, must be something else unlimited in its source, that could create without experiencing decay, so that genesis would never stop. Apeiron The Refutation attributed to Hippolytus of Rome (I, 5), and the later 6th century Byzantine philosopher Simplicius of Cilicia, attribute to Anaximander the earliest use of the word apeiron ( "infinite" or "limitless") to designate the original principle. He was the first philosopher to employ, in a philosophical context, the term archē (), which until then had meant beginning or origin. "That Anaximander called this something by the name of is the natural interpretation of what Theophrastos says; the current statement that the term was introduced by him appears to be due to a misunderstanding." And "Hippolytos, however, is not an independent authority, and the only question is what Theophrastos wrote." For him, it became no longer a mere point in time, but a source that could perpetually give birth to whatever will be. The indefiniteness is spatial in early usages as in Homer (indefinite sea) and as in Xenophanes (6th century BC) who said that the earth went down indefinitely (to apeiron) i.e. beyond the imagination or concept of men. Burnet (1930) in Early Greek Philosophy says: "Nearly all we know of Anaximander's system is derived in the last resort from Theophrastos, who certainly knew his book. He seems once at least to have quoted Anaximander's own words, and he criticised his style. Here are the remains of what he said of him in the First Book: "Anaximander of Miletos, son of Praxiades, a fellow-citizen and associate of Thales, said that the material cause and first element of things was the Infinite, he being the first to introduce this name of the material cause. He says it is neither water nor any other of the so-called elements, but a substance different from them which is infinite" [apeiron, or ] "from which arise all the heavens and the worlds within them.—Phys, Op. fr. 2 (Dox. p. 476; R. P. 16)." Burnet's quote from the "First Book" is his translation of Theophrastos' Physic Opinion fragment 2 as it appears in p. 476 of Historia Philosophiae Graecae (1898) by Ritter and Preller and section 16 of Doxographi Graeci (1879) by Diels. By ascribing the "Infinite" with a "material cause", Theophrastos is following the Aristotelian tradition of "nearly always discussing the facts from the point of view of his own system". Aristotle writes (Metaphysics, I.III 3–4) that the Pre-Socratics were searching for the element that constitutes all things. While each pre-Socratic philosopher gave a different answer as to the identity of this element (water for Thales and air for Anaximenes), Anaximander understood the beginning or first principle to be an endless, unlimited primordial mass (apeiron), subject to neither old age nor decay, that perpetually yielded fresh materials from which everything we perceive is derived. He proposed the theory of the apeiron in direct response to the earlier theory of his teacher, Thales, who had claimed that the primary substance was water. The notion of temporal infinity was familiar to the Greek mind from remote antiquity in the religious concept of immortality, and Anaximander's description was in terms appropriate to this conception. This archē is called "eternal and ageless". (Hippolytus (?), Refutation, I,6,I;DK B2) "Aristotle puts things in his own way regardless of historical considerations, and it is difficult to see that it is more of an anachronism to call the Boundless " intermediate between the elements " than to say that it is " distinct from the elements." Indeed, if once we introduce the elements at all, the former description is the more adequate of the two. At any rate, if we refuse to understand these passages as referring to Anaximander, we shall have to say that Aristotle paid a great deal of attention to some one whose very name has been lost, and who not only agreed with some of Anaximander's views, but also used some of his most characteristic expressions. We may add that in one or two places Aristotle certainly seems to identify the " intermediate " with the something " distinct from " the elements." "It is certain that he [Anaximander] cannot have said anything about elements, which no one thought of before Empedokles, and no one could think of before Parmenides. The question has only been mentioned because it has given rise to a lengthy controversy, and because it throws light on the historical value of Aristotle's statements. From the point of view of his own system, these may be justified; but we shall have to remember in other cases that, when he seems to attribute an idea to some earlier thinker, we are not bound to take what he says in an historical sense." For Anaximander, the principle of things, the constituent of all substances, is nothing determined and not an element such as water in Thales' view. Neither is it something halfway between air and water, or between air and fire, thicker than air and fire, or more subtle than water and earth. Anaximander argues that water cannot embrace all of the opposites found in nature — for example, water can only be wet, never dry — and therefore cannot be the one primary substance; nor could any of the other candidates. He postulated the apeiron as a substance that, although not directly perceptible to us, could explain the opposites he saw around him. "If Thales had been right in saying that water was the fundamental reality, it would not be easy to see how anything else could ever have existed. One side of the opposition, the cold and moist, would have had its way unchecked, and the warm and dry would have been driven from the field long ago. We must, then, have something not itself one of the warring opposites, something more primitive, out of which they arise, and into which they once more pass away." Anaximander explains how the four elements of ancient physics (air, earth, water and fire) are formed, and how Earth and terrestrial beings are formed through their interactions. Unlike other Pre-Socratics, he never defines this principle precisely, and it has generally been understood (e.g., by Aristotle and by Saint Augustine) as a sort of primal chaos. According to him, the Universe originates in the separation of opposites in the primordial matter. It embraces the opposites of hot and cold, wet and dry, and directs the movement of things; an entire host of shapes and differences then grow that are found in "all the worlds" (for he believed there were many). "Anaximander taught, then, that there was an eternal. The indestructible something out of which everything arises, and into which everything returns; a boundless stock from which the waste of existence is continually made good, "elements.". That is only the natural development of the thought we have ascribed to Thales, and there can be no doubt that Anaximander at least formulated it distinctly. Indeed, we can still follow to some extent the reasoning which led him to do so. Thales had regarded water as the most likely thing to be that of which all others are forms; Anaximander appears to have asked how the primary substance could be one of these particular things. His argument seems to be preserved by Aristotle, who has the following passage in his discussion of the Infinite: "Further, there cannot be a single, simple body which is infinite, either, as some hold, one distinct from the elements, which they then derive from it, or without this qualification. For there are some who make this. (i.e. a body distinct from the elements). the infinite, and not air or water, in order that the other things may not be destroyed by their infinity. They are in opposition one to another. air is cold, water moist, and fire hot. and therefore, if any one of them were infinite, the rest would have ceased to be by this time. Accordingly they say that what is infinite is something other than the elements, and from it the elements arise.'⁠—Aristotle Physics. F, 5 204 b 22 (Ritter and Preller (1898) Historia Philosophiae Graecae, section 16 b)." Anaximander maintains that all dying things are returning to the element from which they came (apeiron). The one surviving fragment of Anaximander's writing deals with this matter. Simplicius transmitted it as a quotation, which describes the balanced and mutual changes of the elements: Whence things have their origin, Thence also their destruction happens, According to necessity; For they give to each other justice and recompense For their injustice In conformity with the ordinance of Time. Simplicius mentions that Anaximander said all these "in poetic terms", meaning that he used the old mythical language. The goddess Justice (Dike) keeps the cosmic order. This concept of returning to the element of origin was often revisited afterwards, notably by Aristotle, and by the Greek tragedian Euripides: "what comes from earth must return to earth." Friedrich Nietzsche, in his Philosophy in the Tragic Age of the Greeks, stated that Anaximander viewed "... all coming-to-be as though it were an illegitimate emancipation from eternal being, a wrong for which destruction is the only penance." Physicist Max Born, in commenting upon Werner Heisenberg's arriving at the idea that the elementary particles of quantum mechanics are to be seen as different manifestations, different quantum states, of one and the same "primordial substance,"' proposed that this primordial substance be called apeiron. A free-floating Earth Anaximander was the first to conceive a mechanical model of the world. In his model, the Earth floats very still in the centre of the infinite, not supported by anything. It remains "in the same place because of its indifference", a point of view that Aristotle considered ingenious, in On the Heavens. Its curious shape is that of a cylinder with a height one-third of its diameter. The flat top forms the inhabited world, which is surrounded by a circular oceanic mass. Carlo Rovelli suggests that Anaximander took the idea of the Earth's shape as a floating disk from Thales, who had imagined the Earth floating in water, the "immense ocean from which everything is born and upon which the Earth floats." Anaximander was then able to envisage the Earth at the centre of an infinite space, in which case it required no support as there was nowhere "down" to fall. In Rovelli's view, the shape – a cylinder or a sphere – is unimportant compared to the appreciation of a "finite body that floats free in space." Anaximander's realization that the Earth floats free without falling and does not need to be resting on something has been indicated by many as the first cosmological revolution and the starting point of scientific thinking. Karl Popper calls this idea "one of the boldest, most revolutionary, and most portentous ideas in the whole history of human thinking." Such a model allowed the concept that celestial bodies could pass under the Earth, opening the way to Greek astronomy. Rovelli suggests that seeing the stars circling the Pole star, and both vanishing below the horizon on one side and reappearing above it on the other, would suggest to the astronomer that there was a void both above and below the Earth. Cosmology Anaximander's bold use of non-mythological explanatory hypotheses considerably distinguishes him from previous cosmology writers such as Hesiod. It indicates a pre-Socratic effort to demystify physical processes. His major contribution to history was writing the oldest prose document about the Universe and the origins of life; for this he is often called the "Father of Cosmology" and founder of astronomy. However, pseudo-Plutarch states that he still viewed celestial bodies as deities. He placed the celestial bodies in the wrong order. He thought that the stars were nearest to the earth, then the moon, and the sun farthest away. His scheme is compatible with the Indo-Iranian philosophical traditions contained in the Iranian Avesta och the Indian Upanishads. At the origin, after the separation of hot and cold, a ball of flame appeared that surrounded Earth like bark on a tree. This ball broke apart to form the rest of the Universe. It resembled a system of hollow concentric wheels, filled with fire, with the rims pierced by holes like those of a flute. Consequently, the Sun was the fire that one could see through a hole the same size as the Earth on the farthest wheel, and an eclipse corresponded with the occlusion of that hole. The diameter of the solar wheel was twenty-seven times that of the Earth (or twenty-eight, depending on the sources) and the lunar wheel, whose fire was less intense, eighteen (or nineteen) times. Its hole could change shape, thus explaining lunar phases. The stars and the planets, located closer, followed the same model. Anaximander was the first astronomer to consider the Sun as a huge mass, and consequently, to realize how far from Earth it might be, and the first to present a system where the celestial bodies turned at different distances. Furthermore, according to Diogenes Laertius (II, 2), he built a celestial sphere. This invention undoubtedly made him the first to realize the obliquity of the Zodiac as the Roman philosopher Pliny the Elder reports in Natural History (II, 8). It is a little early to use the term ecliptic, but his knowledge and work on astronomy confirm that he must have observed the inclination of the celestial sphere in relation to the plane of the Earth to explain the seasons. The doxographer and theologian Aetius attributes to Pythagoras the exact measurement of the obliquity. Multiple worlds According to Simplicius, Anaximander already speculated on the plurality of worlds, similar to atomists Leucippus and Democritus, and later philosopher Epicurus. These thinkers supposed that worlds appeared and disappeared for a while, and that some were born when others perished. They claimed that this movement was eternal, "for without movement, there can be no generation, no destruction". In addition to Simplicius, Hippolytus reports Anaximander's claim that from the infinite comes the principle of beings, which themselves come from the heavens and the worlds (several doxographers use the plural when this philosopher is referring to the worlds within, which are often infinite in quantity). Cicero writes that he attributes different gods to the countless worlds. This theory places Anaximander close to the Atomists and the Epicureans who, more than a century later, also claimed that an infinity of worlds appeared and disappeared. In the timeline of the Greek history of thought, some thinkers conceptualized a single world (Plato, Aristotle, Anaxagoras and Archelaus), while others instead speculated on the existence of a series of worlds, continuous or non-continuous (Anaximenes, Heraclitus, Empedocles and Diogenes). Meteorological phenomena Anaximander attributed some phenomena, such as thunder and lightning, to the intervention of elements, rather than to divine causes. In his system, thunder results from the shock of clouds hitting each other; the loudness of the sound is proportionate with that of the shock. Thunder without lightning is the result of the wind being too weak to emit any flame, but strong enough to produce a sound. A flash of lightning without thunder is a jolt of the air that disperses and falls, allowing a less active fire to break free. Thunderbolts are the result of a thicker and more violent air flow. He saw the sea as a remnant of the mass of humidity that once surrounded Earth. A part of that mass evaporated under the sun's action, thus causing the winds and even the rotation of the celestial bodies, which he believed were attracted to places where water is more abundant. He explained rain as a product of the humidity pumped up from Earth by the sun. For him, the Earth was slowly drying up and water only remained in the deepest regions, which someday would go dry as well. According to Aristotle's Meteorology (II, 3), Democritus also shared this opinion. Origin of mankind Anaximander speculated about the beginnings and origin of animal life, and that humans came from other animals in waters. According to his evolutionary theory, animals sprang out of the sea long ago, born trapped in a spiny bark, but as they got older, the bark would dry up and animals would be able to break it. As the early humidity evaporated, dry land emerged and, in time, humankind had to adapt. The 3rd century Roman writer Censorinus reports: Anaximander put forward the idea that humans had to spend part of this transition inside the mouths of big fish to protect themselves from the Earth's climate until they could come out in open air and lose their scales. He thought that, considering humans' extended infancy, we could not have survived in the primeval world in the same manner we do presently. Other accomplishments Cartography Both Strabo and Agathemerus (later Greek geographers) claim that, according to the geographer Eratosthenes, Anaximander was the first to publish a map of the world. The map probably inspired the Greek historian Hecataeus of Miletus to draw a more accurate version. Strabo viewed both as the first geographers after Homer. Maps were produced in ancient times, also notably in Egypt, Lydia, the Middle East, and Babylon. Only some small examples survived until today. The unique example of a world map comes from the late Babylonian Map of the World later than 9th century BC but is based probably on a much older map. These maps indicated directions, roads, towns, borders, and geological features. Anaximander's innovation was to represent the entire inhabited land known to the ancient Greeks. Such an accomplishment is more significant than it at first appears. Anaximander most likely drew this map for three reasons. First, it could be used to improve navigation and trade between Miletus's colonies and other colonies around the Mediterranean Sea and Black Sea. Second, Thales would probably have found it easier to convince the Ionian city-states to join in a federation in order to push the Median threat away if he possessed such a tool. Finally, the philosophical idea of a global representation of the world simply for the sake of knowledge was reason enough to design one. Surely aware of the sea's convexity, he may have designed his map on a slightly rounded metal surface. The centre or “navel” of the world ( omphalós gẽs) could have been Delphi, but is more likely in Anaximander's time to have been located near Miletus. The Aegean Sea was near the map's centre and enclosed by three continents, themselves located in the middle of the ocean and isolated like islands by sea and rivers. Europe was bordered on the south by the Mediterranean Sea and was separated from Asia by the Black Sea, the Lake Maeotis, and, further east, either by the Phasis River (now called the Rioni in Georgia) or the Tanais. The Nile flowed south into the ocean, separating Libya (which was the name for the part of the then-known African continent) from Asia. Gnomon The Suda relates that Anaximander explained some basic notions of geometry. It also mentions his interest in the measurement of time and associates him with the introduction in Greece of the gnomon. In Lacedaemon, he participated in the construction, or at least in the adjustment, of sundials to indicate solstices and equinoxes. Indeed, a gnomon required adjustments from a place to another because of the difference in latitude. In his time, the gnomon was simply a vertical pillar or rod mounted on a horizontal plane. The position of its shadow on the plane indicated the time of day. As it moves through its apparent course, the Sun draws a curve with the tip of the projected shadow, which is shortest at noon, when pointing due south. The variation in the tip's position at noon indicates the solar time and the seasons; the shadow is longest on the winter solstice and shortest on the summer solstice. The invention of the gnomon itself cannot be attributed to Anaximander because its use, as well as the division of days into twelve parts, came from the Babylonians. It is they, according to Herodotus' Histories (II, 109), who gave the Greeks the art of time measurement. It is likely that he was not the first to determine the solstices, because no calculation is necessary. On the other hand, equinoxes do not correspond to the middle point between the positions during solstices, as the Babylonians thought. As the Suda seems to suggest, it is very likely that with his knowledge of geometry, he became the first Greek to determine accurately the equinoxes. Prediction of an earthquake In his philosophical work De Divinatione (I, 50, 112), Cicero states that Anaximander convinced the inhabitants of Lacedaemon to abandon their city and spend the night in the country with their weapons because an earthquake was near. The city collapsed when the top of the Taygetus split like the stern of a ship. Pliny the Elder also mentions this anecdote (II, 81), suggesting that it came from an "admirable inspiration", as opposed to Cicero, who did not associate the prediction with divination. Scientific method Rovelli credits Anaximander with pioneering the "first great scientific revolution in history" by introducing the naturalistic approach to understanding the universe, according to which the universe operates by inviolable laws, without recourse to supernatural explanations. According to Rovelli, Anaximander not only paved the way for modern science, but revolutionized the process for how we form our worldview, by constantly questioning and rejecting certainty. Rovelli further states that Anaximander has not been given his due credit, largely because his naturalistic approach was strongly opposed in antiquity (among others by Aristotle) and had yet to yield the tangible benefits it has today. Legacy In the 2017 essay collection Anaximander in Context: New Studies on the Origins of Greek Philosophy, Dirk Couprie, Robert Hahn and Gerald Naddaf describe Anaximander as "one of the greatest minds in history", but one that has not been given his due. Couprie goes to state that he considers him on par with Newton. Bertrand Russell in the History of Western Philosophy interprets Anaximander's theories as an assertion of the necessity of an appropriate balance between earth, fire, and water, all of which may be independently seeking to aggrandize their proportions relative to the others. Anaximander seems to express his belief that a natural order ensures balance among these elements, that where there was fire, ashes (earth) now exist. His Greek peers echoed this sentiment with their belief in natural boundaries beyond which not even the gods could operate. Friedrich Nietzsche, in Philosophy in the Tragic Age of the Greeks, claimed that Anaximander was a pessimist who asserted that the primal being of the world was a state of indefiniteness. In accordance with this, anything definite has to eventually pass back into indefiniteness. In other words, Anaximander viewed "...all coming-to-be as though it were an illegitimate emancipation from eternal being, a wrong for which destruction is the only penance". (Ibid., § 4) The world of individual objects, in this way of thinking, has no worth and should perish. Martin Heidegger lectured extensively on Anaximander, and delivered a lecture entitled "Anaximander's Saying" which was subsequently included in Off the Beaten Track. The lecture examines the ontological difference and the oblivion of Being or Dasein in the context of the Anaximander fragment. Heidegger's lecture is, in turn, an important influence on the French philosopher Jacques Derrida. The Anaximander (31st) High School of Thessaloniki, Greece is named after Anaximander. Works According to the Suda: On Nature ( / Perì phúseôs) Rotation of the Earth ( / Gễs períodos) On Fixed stars ( / Perì tỗn aplanỗn) The [Celestial] Sphere ( / Sphaĩra) See also Indefinite monism References Sources Primary Aelian: Various History (III, 17) Aëtius: De Fide (I-III; V) Agathemerus: A Sketch of Geography in Epitome (I, 1) Aristotle: Meteorology (II, 3) Translated by E. W. Webster Aristotle: On Generation and Corruption (II, 5) Translated by H. H. Joachim Aristotle: On the Heavens (II, 13) Translated by J. L. Stocks (III, 5, 204 b 33–34) Censorinus: De Die Natali (IV, 7) See original text at LacusCurtius (I, 50, 112) Cicero: On the Nature of the Gods (I, 10, 25) Euripides: The Suppliants (532) Translated by E. P. Coleridge Eusebius of Caesarea: Preparation for the Gospel (X, 14, 11) Translated by E.H. Gifford Heidel, W.A. Anaximander's Book: PAAAS, vol. 56, n.7, 1921, pp. 239–288. Herodotus: Histories (II, 109) See original text in Perseus project Hippolytus (?): Refutation of All Heresies (I, 5) Translated by Roberts and Donaldson Pliny the Elder: Natural History (II, 8) See original text in Perseus project Pseudo-Plutarch: The Doctrines of the Philosophers (I, 3; I, 7; II, 20–28; III, 2–16; V, 19) Seneca the Younger: Natural Questions (II, 18) Simplicius: Comments on Aristotle's Physics (24, 13–25; 1121, 5–9) Strabo: Geography (I, 1) Books 1‑7, 15‑17 translated by H. L. Jones Themistius: Oratio (36, 317) The Suda (Suda On Line) Secondary The default source; anything not otherwise attributed should be in Conche. External links Philoctete – Anaximandre: Fragments ((Grk icon)) The Internet Encyclopedia of Philosophy – Anaximander Extensive bibliography by Dirk Couprie Anaximander of Miletus Life and Work - Fragments and Testimonies by Giannis Stamatellos 6th-century BC Greek philosophers 610s BC births Year of birth unknown 540s BC deaths Year of death unknown Ancient Greek astronomers Ancient Greek cartographers Ancient Greek metaphysicians Ancient Greek physicists Ancient Greeks from the Achaemenid Empire Ancient Milesians Natural philosophers Philosophers of ancient Ionia Presocratic philosophers 6th-century BC geographers 6th-century BC astronomers	6
An architect is a person who plans, designs and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that have human occupancy or use as their principal purpose. Etymologically, the term architect derives from the Latin , which derives from the Greek (-, chief + , builder), i.e., chief builder. The professional requirements for architects vary from location to location. An architect's decisions affect public safety and thus the architect must undergo specialized training consisting of advanced education and a practicum (or internship) for practical experience to earn a license to practice architecture. Practical, technical, and academic requirements for becoming an architect vary by jurisdiction though the formal study of architecture in academic institutions has played a pivotal role in the development of the profession. Origins Throughout ancient and medieval history, most architectural design and construction was carried out by artisans—such as stone masons and carpenters, rising to the role of master builder. Until modern times, there was no clear distinction between architect and engineer. In Europe, the titles architect and engineer were primarily geographical variations that referred to the same person, often used interchangeably. "Architect" derives from Greek (, "master builder", "chief ). It is suggested that various developments in technology and mathematics allowed the development of the professional 'gentleman' architect, separate from the hands-on craftsman. Paper was not used in Europe for drawing until the 15th century, but became increasingly available after 1500. Pencils were used for drawing by 1600. The availability of both paper and pencils allowed pre-construction drawings to be made by professionals. Concurrently, the introduction of linear perspective and innovations such as the use of different projections to describe a three-dimensional building in two dimensions, together with an increased understanding of dimensional accuracy, helped building designers communicate their ideas. However, development was gradual and slow going. Until the 18th-century, buildings continued to be designed and set out by craftsmen, with the exception of high-status projects. Architecture In most developed countries, only those qualified with an appropriate license, certification, or registration with a relevant body (often governmental), may legally practice architecture. Such licensure usually required a university degree, successful completion of exams, as well as a training period. Representation of oneself as an architect through the use of terms and titles were restricted to licensed individuals by law, although in general, derivatives such as architectural designer were not legally protected. To practice architecture implies the ability to practice independently of supervision. The term building design professional (or design professional), by contrast, is a much broader term that includes professionals who practice independently under an alternate profession such as engineering professionals, or those who assist in the practice of architecture under the supervision of a licensed architect such as intern architects. In many places, independent, non-licensed individuals, may perform design services outside the professional restrictions such as the design houses or other smaller structures. Practice In the architectural profession, technical and environmental knowledge, design, and construction management, require an understanding of business as well as design. However, design is the driving force throughout the project and beyond. An architect accepts a commission from a client. The commission might involve preparing feasibility reports, building audits, designing a building or several buildings, structures, and the spaces among them. The architect participates in developing the requirements the client wants in the building. Throughout the project (planning to occupancy), the architect coordinates a design team. Structural, mechanical, and electrical engineers are hired by the client or architect, who must ensure that the work is coordinated to construct the design. Design role The architect, once hired by a client, is responsible for creating a design concept that meets the requirements of that client and provides a facility suitable to the required use. The architect must meet with and put questions to the client, in order to ascertain all the requirements (and nuances) of the planned project. Often the full brief is not clear in the beginning. It involves a degree of risk in the design undertaking. The architect may make early proposals to the client which may rework the terms of the brief. The "program" (or brief) is essential to producing a project that meets all the needs of the owner. This becomes a guide for the architect in creating the design concept. Design proposal(s) are generally expected to be both imaginative and pragmatic. Much depends upon the time, place, finance, culture, and available crafts and technology in which the design takes place. The extent and nature of these expectations will vary. Foresight is a prerequisite when designing buildings as it is a very complex and demanding undertaking. Any design concept during the early stage of its generation must take into account a great number of issues and variables including qualities of space(s), the end-use and life-cycle of these proposed spaces, connections, relations, and aspects between spaces including how they are put together and the impact of proposals on the immediate and wider locality. Selection of appropriate materials and technology must be considered, tested, and reviewed at an early stage in the design to ensure there are no setbacks (such as higher-than-expected costs) which could occur later in the project. The site and its surrounding environment as well as the culture and history of the place, will also influence the design. The design must also balance increasing concerns with environmental sustainability. The architect may introduce (intentionally or not), aspects of mathematics and architecture, new or current architectural theory, or references to architectural history. A key part of the design is that the architect often must consult with engineers, surveyors and other specialists throughout the design, ensuring that aspects such as structural supports and air conditioning elements are coordinated. The control and planning of construction costs are also a part of these consultations. Coordination of the different aspects involves a high degree of specialized communication including advanced computer technology such as building information modeling (BIM), computer-aided design (CAD), and cloud-based technologies. Finally, at all times, the architect must report back to the client who may have reservations or recommendations which might introduce further variables into the design. Architects also deal with local and federal jurisdictions regarding regulations and building codes. The architect might need to comply with local planning and zoning laws such as required setbacks, height limitations, parking requirements, transparency requirements (windows), and land use. Some jurisdictions require adherence to design and historic preservation guidelines. Health and safety risks form a vital part of the current design, and in some jurisdictions, design reports and records are required to include ongoing considerations of materials and contaminants, waste management and recycling, traffic control, and fire safety. Means of design Previously, architects employed drawings to illustrate and generate design proposals. While conceptual sketches are still widely used by architects, computer technology has now become the industry standard. Furthermore, design may include the use of photos, collages, prints, linocuts, 3D scanning technology, and other media in design production. Increasingly, computer software is shaping how architects work. BIM technology allows for the creation of a virtual building that serves as an information database for the sharing of design and building information throughout the life-cycle of the building's design, construction, and maintenance. Virtual reality (VR) presentations are becoming more common for visualizing structural designs and interior spaces from the point-of-view perspective. Environmental role Since modern buildings are known to place carbon into the atmosphere, increasing controls are being placed on buildings and associated technology to reduce emissions, increase energy efficiency, and make use of renewable energy sources. Renewable energy sources may be designed into the proposed building by local or national renewable energy providers. As a result, the architect is required to remain abreast of current regulations that are continually being updated. Some new developments exhibit extremely low energy use or passive solar building design. However, the architect is also increasingly being required to provide initiatives in a wider environmental sense. Examples of this include making provisions for low-energy transport, natural daylighting instead of artificial lighting, natural ventilation instead of air conditioning, pollution, and waste management, use of recycled materials, and employment of materials which can be easily recycled. Construction role As the design becomes more advanced and detailed, specifications and detail designs are made of all the elements and components of the building. Techniques in the production of a building are continually advancing which places a demand on the architect to ensure that he or she remains up to date with these advances. Depending on the client's needs and the jurisdiction's requirements, the spectrum of the architect's services during each construction stage may be extensive (detailed document preparation and construction review) or less involved (such as allowing a contractor to exercise considerable design-build functions). Architects typically put projects to tender on behalf of their clients, advise them on the award of the project to a general contractor, facilitate and administer a contract of agreement which is often between the client and the contractor. This contract is legally binding and covers a wide range of aspects including the insurance and commitments of all stakeholders, the status of the design documents, provisions for the architect's access, and procedures for the control of the works as they proceed. Depending on the type of contract utilized, provisions for further sub-contract tenders may be required. The architect may require that some elements are covered by a warranty which specifies the expected life and other aspects of the material, product, or work. In most jurisdictions, prior notification to the relevant authority must be given before commencement of the project, giving the local authority notice to carry out independent inspections. The architect will then review and inspect the progress of the work in coordination with the local authority. The architect will typically review contractor shop drawings and other submittals, prepare and issue site instructions, and provide Certificates for Payment to the contractor (see also Design-bid-build) which is based on the work done as well as any materials and other goods purchased or hired in the future. In the United Kingdom and other countries, a quantity surveyor is often part of the team to provide cost consulting. With large, complex projects, an independent construction manager is sometimes hired to assist in the design and management of the construction. In many jurisdictions, mandatory certification or assurance of the completed work or part of works, is required. This demand for certification entails a high degree of risk; therefore, regular inspections of the work as it progresses on site is required to ensure that the design is in compliance itself as well as following all relevant statutes and permissions. Alternate practice and specializations Recent decades have seen the rise of specializations within the profession. Many architects and architectural firms focus on certain project types (e.g. healthcare, retail, public housing, and event management), technological expertise, or project delivery methods. Some architects specialize in building code, building envelope, sustainable design, technical writing, historic preservation(US) or conservation (UK), and accessibility. Many architects elect to move into real estate (property) development, corporate facilities planning, project management, construction management, chief sustainability officers interior design, city planning, user experience design, and design research. Professional requirements Although there are variations in each location, most of the world's architects are required to register with the appropriate jurisdiction. Architects are typically required to meet three common requirements: education, experience, and examination. Basic educational requirement generally consist of a university degree in architecture. The experience requirement for degree candidates is usually satisfied by a practicum or internship (usually two to three years). Finally, a Registration Examination or a series of exams is required prior to licensure. Professionals who engaged in the design and supervision of construction projects prior to the late 19th century were not necessarily trained in a separate architecture program in an academic setting. Instead, they often trained under established architects. Prior to modern times, there was no distinction between architects and engineers and the title used varied depending on geographical location. They often carried the title of master builder or surveyor after serving a number of years as an apprentice (such as Sir Christopher Wren). The formal study of architecture in academic institutions played a pivotal role in the development of the profession as a whole, serving as a focal point for advances in architectural technology and theory. The use of "Architect" or abbreviations such as "Ar." as a title attached to a person's name was regulated by law in some countries. Fees Architects' fee structure was typically based on a percentage of construction value, as a rate per unit area of the proposed construction, hourly rates, or a fixed lump sum fee. Combination of these structures was also common. Fixed fees were usually based on a project's allocated construction cost and could range between 4 and 12% of new construction cost for commercial and institutional projects, depending on a project's size and complexity. Residential projects ranged from 12 to 20%. Renovation projects typically commanded higher percentages such as 15-20%. Overall billings for architectural firms range widely, depending on their location and economic climate. Billings have traditionally been dependent on the local economic conditions, but with rapid globalization, this is becoming less of a factor for large international firms. Salaries could also vary depending on experience, position within the firm (i.e. staff architect, partner, or shareholder, etc.), and the size and location of the firm. Professional organizations A number of national professional organizations exist to promote career and business development in architecture. The International Union of Architects (UIA) The American Institute of Architects (AIA) US Royal Institute of British Architects (RIBA) UK Architects Registration Board (ARB) UK The Australian Institute of Architects (AIA) Australia The South African Institute of Architects (SAIA) South Africa Association of Consultant Architects (ACA) UK Association of Licensed Architects (ALA) US The Consejo Profesional de Arquitectura y Urbanismo (CPAU) Argentina Indian Institute of Architects (IIA) & Council of Architecture (COA) India The National Organization of Minority Architects (NOMA) US Prizes and awards A wide variety of prizes is awarded by national professional associations and other bodies, recognizing accomplished architects, their buildings, structures, and professional careers. The most lucrative award an architect can receive is the Pritzker Prize, sometimes termed the "Nobel Prize for architecture." The inaugural Pritzker Prize winner was Philip Johnson who was cited "for 50 years of imagination and vitality embodied in a myriad of museums, theatres libraries, houses gardens and corporate structure". The Pritzker Prize has been awarded for forty-two straight editions without interruption, and there are now 22 countries with at least one winning architect. Other prestigious architectural awards are the Royal Gold Medal, the AIA Gold Medal (US), AIA Gold Medal (Australia), and the Praemium Imperiale. Architects in the UK, who have made contributions to the profession through design excellence or architectural education, or have in some other way advanced the profession, might until 1971 be elected Fellows of the Royal Institute of British Architects and can write FRIBA after their name if they feel so inclined. Those elected to chartered membership of the RIBA after 1971 may use the initials RIBA but cannot use the old ARIBA and FRIBA. An Honorary Fellow may use the initials, Hon. FRIBA. and an International Fellow may use the initials Int. FRIBA. Architects in the US, who have made contributions to the profession through design excellence or architectural education, or have in some other way advanced the profession, are elected Fellows of the American Institute of Architects and can write FAIA after their name. Architects in Canada, who have made outstanding contributions to the profession through contribution to research, scholarship, public service, or professional standing to the good of architecture in Canada, or elsewhere, may be recognized as a Fellow of the Royal Architectural Institute of Canada and can write FRAIC after their name. In Hong Kong, those elected to chartered membership may use the initial HKIA, and those who have made a special contribution after nomination and election by The Hong Kong Institute of Architects (HKIA), may be elected as fellow members of HKIA and may use FHKIA after their name. See also References Architecture occupations Professional certification in architecture	11
Events Pre-1600 527 – Byzantine Emperor Justin I names his nephew Justinian I as co-ruler and successor to the throne. 1081 – Alexios I Komnenos overthrows the Byzantine emperor Nikephoros III Botaneiates, and, after his troops spend three days extensively looting Constantinople, is formally crowned on April 4. 1572 – In the Eighty Years' War, the Watergeuzen capture Brielle from the Seventeen Provinces, gaining the first foothold on land for what would become the Dutch Republic. 1601–1900 1789 – In New York City, the United States House of Representatives achieves its first quorum and elects Frederick Muhlenberg of Pennsylvania as its first Speaker. 1833 – The Convention of 1833, a political gathering of settlers in Mexican Texas to help draft a series of petitions to the Mexican government, begins in San Felipe de Austin. 1865 – American Civil War: Union troops led by Philip Sheridan decisively defeat Confederate troops led by George Pickett, cutting the Army of Northern Virginia's last supply line during the Siege of Petersburg. 1867 – Singapore becomes a British crown colony. 1873 – The White Star steamer SS Atlantic sinks off Nova Scotia, killing 547 in one of the worst marine disasters of the 19th century. 1900 – Prince George becomes absolute monarch of the Cretan State. 1901–present 1908 – The Territorial Force (renamed Territorial Army in 1920) is formed as a volunteer reserve component of the British Army. 1918 – The Royal Air Force is created by the merger of the Royal Flying Corps and the Royal Naval Air Service. 1924 – Adolf Hitler is sentenced to five years imprisonment for his participation in the "Beer Hall Putsch" but spends only nine months in jail. 1924 – The Royal Canadian Air Force is formed. 1933 – The recently elected Nazis under Julius Streicher organize a one-day boycott of all Jewish-owned businesses in Germany, ushering in a series of anti-Semitic acts. 1935 – India's central banking institution, the Reserve Bank of India, is formed. 1937 – Aden becomes a British crown colony. 1937 – The Royal New Zealand Air Force is formed as an independent service. 1939 – Spanish Civil War: Generalísimo Francisco Franco of the Spanish State announces the end of the Spanish Civil War, when the last of the Republican forces surrender. 1941 – Fântâna Albă massacre: Between two hundred and two thousand Romanian civilians are killed by Soviet Border Troops. 1941 – A military coup in Iraq overthrows the regime of 'Abd al-Ilah and installs Rashid Ali al-Gaylani as Prime Minister. 1944 – World War II: Navigation errors lead to an accidental American bombing of the Swiss city of Schaffhausen. 1945 – World War II: The Tenth United States Army attacks the Thirty-Second Japanese Army on Okinawa. 1946 – The 8.6 Aleutian Islands earthquake shakes the Aleutian Islands with a maximum Mercalli intensity of VI (Strong). A destructive tsunami reaches the Hawaiian Islands resulting in dozens of deaths, mostly in Hilo, Hawaii. 1946 – The Malayan Union is established. Protests from locals led to the establishment of the Federation of Malaya two years later. 1947 – The only mutiny in the history of the Royal New Zealand Navy begins. 1948 – Cold War: Communist forces respond to the introduction of the Deutsche Mark by attempting to force the western powers to withdraw from Berlin. 1948 – Faroe Islands gain autonomy from Denmark. 1949 – Chinese Civil War: The Chinese Communist Party holds unsuccessful peace talks with the Nationalist Party in Beijing, after three years of fighting. 1949 – The Government of Canada repeals Japanese-Canadian internment after seven years. 1954 – United States President Dwight D. Eisenhower authorizes the creation of the United States Air Force Academy in Colorado Springs, Colorado. 1955 – The EOKA rebellion against the British Empire begins in Cyprus, with the goal of unifying with Greece. 1960 – The TIROS-1 satellite transmits the first television picture from space. 1964 – The British Admiralty, War Office and Air Ministry are replaced by a unified Defence Council of the United Kingdom. 1969 – The Hawker Siddeley Harrier, the first operational fighter aircraft with Vertical/Short Takeoff and Landing capabilities, enters service with the Royal Air Force. 1970 – President Richard Nixon signs the Public Health Cigarette Smoking Act into law. 1971 – Bangladesh Liberation War: The Pakistan Army massacre more than a thousand people in Keraniganj Upazila, Bangladesh. 1973 – Project Tiger, a tiger conservation project, is launched in the Jim Corbett National Park, India. 1974 – The Local Government Act 1972 of England and Wales comes into effect. 1976 – Steve Jobs and Steve Wozniak found Apple Computer, Inc. 1979 – Iran becomes an Islamic republic by a 99% vote, officially overthrowing the Shah. 1984 – Singer Marvin Gaye is shot to death by his father in his home in Arlington Heights, Los Angeles, California. 1986 – Communist Party of Nepal (Mashal) cadres attack a number of police stations in Kathmandu, seeking to incite a popular rebellion. 1989 – Margaret Thatcher's new local government tax, the Community Charge (commonly known as the "poll tax"), is introduced in Scotland. 1993 – NASCAR racer Alan Kulwicki is killed in a plane crash near the Tri-Cities Regional Airport in Blountville, Tennessee. 1997 – Comet Hale–Bopp is seen passing at perihelion. 1999 – Nunavut is established as a Canadian territory carved out of the eastern part of the Northwest Territories. 2001 – An EP-3E United States Navy surveillance aircraft collides with a Chinese People's Liberation Army Shenyang J-8 fighter jet. The Chinese pilot ejected but is subsequently lost. The Navy crew makes an emergency landing in Hainan, China and is detained. 2001 – Former President of Federal Republic of Yugoslavia Slobodan Milošević surrenders to police special forces, to be tried on war crimes charges. 2001 – Same-sex marriage becomes legal in the Netherlands, the first contemporary country to allow it. 2004 – Google launches its Email service Gmail. 2006 – Serious Organised Crime Agency (SOCA) of the Government of the United Kingdom is enforced, but later merged into National Crime Agency on 7 October 2013. 2011 – After protests against the burning of the Quran turn violent, a mob attacks a United Nations compound in Mazar-i-Sharif, Afghanistan, resulting in the deaths of thirteen people, including eight foreign workers. 2016 – The 2016 Nagorno-Karabakh conflict begins along the Nagorno-Karabakh Line of Contact. Births Pre-1600 1220 – Emperor Go-Saga of Japan (d. 1272) 1282 – Louis IV, Holy Roman Emperor (d. 1347) 1328 – Blanche of France, Duchess of Orléans (d. 1382) 1543 – François de Bonne, Duke of Lesdiguières (d. 1626) 1578 – William Harvey, English physician and academic (d. 1657) 1601–1900 1610 – Charles de Saint-Évremond, French soldier and critic (d. 1703) 1629 – Jean-Henri d'Anglebert, French organist and composer (d. 1691) 1640 – Georg Mohr, Danish mathematician and academic (d. 1697) 1647 – John Wilmot, 2nd Earl of Rochester, English poet and courtier (d. 1680) 1697 – Antoine François Prévost, French novelist and translator (d. 1763) 1721 – Pieter Hellendaal, Dutch-English organist, violinist, and composer (d. 1799) 1741 – George Dance the Younger, English architect and surveyor (d. 1825) 1753 – Joseph de Maistre, French philosopher, lawyer, and diplomat (d. 1821) 1755 – Jean Anthelme Brillat-Savarin, French lawyer and politician (d. 1826) 1765 – Luigi Schiavonetti, Italian engraver and etcher (d. 1810) 1776 – Sophie Germain, French mathematician, physicist, and philosopher (d. 1831) 1786 – William Mulready, Irish genre painter (d. 1863) 1815 – Otto von Bismarck, German lawyer and politician, 1st Chancellor of the German Empire (d. 1898) 1815 – Edward Clark, American lawyer and politician, 8th Governor of Texas (d. 1880) 1823 – Simon Bolivar Buckner, American general and politician, 30th Governor of Kentucky (d. 1891) 1824 – Louis-Zéphirin Moreau, Canadian bishop (d. 1901) 1834 – James Fisk, American businessman (d. 1872) 1852 – Edwin Austin Abbey, American painter and illustrator (d. 1911) 1865 – Richard Adolf Zsigmondy, Austrian-German chemist and academic, Nobel Prize laureate (d. 1929) 1866 – William Blomfield, New Zealand cartoonist and politician (d. 1938) 1866 – Ferruccio Busoni, Italian pianist, composer, and conductor (d. 1924) 1866 – Ève Lavallière, French actress (d. 1929) 1868 – Edmond Rostand, French poet and playwright (d. 1918) 1868 – Walter Mead, English cricketer (d. 1954) 1871 – F. Melius Christiansen, Norwegian-American violinist and conductor (d. 1955) 1873 – Sergei Rachmaninoff, Russian pianist, composer, and conductor (d. 1943) 1874 – Ernest Barnes, English mathematician and theologian (d. 1953) 1874 – Prince Karl of Bavaria (d. 1927) 1875 – Edgar Wallace, English journalist, author, and playwright (d. 1932) 1878 – C. Ganesha Iyer, Ceylon Tamil philologist (d. 1958) 1879 – Stanislaus Zbyszko, Polish wrestler and strongman (d. 1967) 1881 – Octavian Goga, Romanian Prime Minister (d. 1938) 1883 – Lon Chaney, American actor, director, and screenwriter (d. 1930) 1883 – Edvard Drabløs, Norwegian actor and director (d. 1976) 1883 – Laurette Taylor, Irish-American actress (d. 1946) 1885 – Wallace Beery, American actor (d. 1949) 1885 – Clementine Churchill, English wife of Winston Churchill (d. 1977) 1889 – K. B. Hedgewar, Indian physician and activist (d. 1940) 1893 – Cicely Courtneidge, Australian-English actress (d. 1980) 1895 – Alberta Hunter, African-American singer-songwriter and nurse (d. 1984) 1898 – William James Sidis, Ukrainian-Russian Jewish American mathematician, anthropologist, and historian (d. 1944) 1899 – Gustavs Celmiņš, Latvian academic and politician (d. 1968) 1900 – Stefanie Clausen, Danish Olympic diver (d. 1981) 1901–present 1901 – Whittaker Chambers, American journalist and spy (d. 1961) 1902 – Maria Polydouri, Greek poet (d. 1930) 1905 – Gaston Eyskens, Belgian economist and politician, 47th Prime Minister of Belgium (d. 1988) 1905 – Paul Hasluck, Australian historian, poet, and politician, 17th Governor-General of Australia (d. 1993) 1906 – Alexander Sergeyevich Yakovlev, Russian engineer, founded the Yakovlev Design Bureau (d. 1989) 1907 – Shivakumara Swami, Indian religious leader and philanthropist (d. 2019) 1908 – Abraham Maslow, American psychologist and academic (d. 1970) 1908 – Harlow Rothert, American shot putter, lawyer, and academic (d. 1997) 1909 – Abner Biberman, American actor, director, and screenwriter (d. 1977) 1909 – Eddy Duchin, American pianist and bandleader (d. 1951) 1910 – Harry Carney, American saxophonist and clarinet player (d. 1974) 1910 – Bob Van Osdel, American high jumper and soldier (d. 1987) 1911 – Augusta Braxton Baker, African American librarian (d. 1998) 1913 – Memos Makris, Greek sculptor (d. 1993) 1915 – O. W. Fischer, Austrian-Swiss actor and director (d. 2004) 1916 – Sheila May Edmonds, British mathematician (d. 2002) 1917 – Sydney Newman, Canadian screenwriter and producer, co-created Doctor Who (d. 1997) 1917 – Melville Shavelson, American director, producer, and screenwriter (d. 2007) 1919 – Joseph Murray, American surgeon and soldier, Nobel Prize laureate (d. 2012) 1920 – Toshiro Mifune, Japanese actor (d. 1997) 1921 – William Bergsma, American composer and educator (d. 1994) 1921 – Arthur "Guitar Boogie" Smith, American guitarist, fiddler, and composer (d. 2014) 1922 – Duke Jordan, American pianist and composer (d. 2006) 1922 – William Manchester, American historian and author (d. 2004) 1924 – Brendan Byrne, American lieutenant, judge, and politician, 47th Governor of New Jersey (d. 2018) 1926 – Anne McCaffrey, American-Irish author (d. 2011) 1927 – Walter Bahr, American soccer player, coach, and manager (d. 2018) 1927 – Amos Milburn, American R&B singer-songwriter and pianist (d. 1980) 1927 – Ferenc Puskás, Hungarian footballer and manager (d. 2006) 1929 – Jonathan Haze, American actor, producer, screenwriter, and production manager 1929 – Milan Kundera, Czech-French novelist, poet, and playwright (d. 2023) 1929 – Payut Ngaokrachang, Thai animator and director (d. 2010) 1929 – Jane Powell, American actress, singer, and dancer (d. 2021) 1930 – Grace Lee Whitney, American actress and singer (d. 2015) 1931 – George Baker, Bulgarian-English actor and screenwriter (d. 2011) 1931 – Rolf Hochhuth, German author and playwright (d. 2020) 1932 – Debbie Reynolds, American actress, singer, and dancer (d. 2016) 1933 – Claude Cohen-Tannoudji, Algerian-French physicist and academic, Nobel Prize laureate 1933 – Dan Flavin, American sculptor and educator (d. 1996) 1933 – Bengt Holbek, Danish folklorist (d. 1992) 1934 – Vladimir Posner, French-American journalist and radio host 1935 – Larry McDonald, American physician and politician (d. 1983) 1936 – Peter Collinson, English-American director and producer (d. 1980) 1936 – Jean-Pascal Delamuraz, Swiss politician, 80th President of the Swiss Confederation (d. 1998) 1936 – Tarun Gogoi, Indian politician, 14th Chief Minister of Assam (d. 2020) 1936 – Abdul Qadeer Khan, Indian-Pakistani physicist, chemist, and engineer (d. 2021) 1937 – Jordan Charney, American actor 1939 – Ali MacGraw, American model and actress 1939 – Phil Niekro, American baseball player and manager (d. 2020) 1940 – Wangari Maathai, Kenyan environmentalist and politician, Nobel Prize laureate (d. 2011) 1941 – Gideon Gadot, Israeli journalist and politician (d. 2012) 1941 – Ajit Wadekar, Indian cricketer, coach, and manager (d. 2018) 1942 – Samuel R. Delany, American author and critic 1942 – Richard D. Wolff, American economist and academic 1943 – Dafydd Wigley, Welsh academic and politician 1943 – Titina Silá, Bissau-Guinean revolutionary (d. 1973) 1946 – Nikitas Kaklamanis, Greek academic and politician, Greek Minister of Health and Social Security 1946 – Ronnie Lane, English bass player, songwriter, and producer (d. 1997) 1946 – Arrigo Sacchi, Italian footballer, coach, and manager 1947 – Alain Connes, French mathematician and academic 1948 – Javier Irureta, Spanish footballer and manager 1948 – Peter Law, Welsh politician and independent Member of Parliament (d. 2006) 1949 – Gérard Mestrallet, French businessman 1949 – Paul Manafort, American lobbyist, political consultant, and convicted felon 1949 – Sammy Nelson, Northern Irish footballer and coach 1949 – Gil Scott-Heron, American singer-songwriter and author (d. 2011) 1950 – Samuel Alito, American lawyer and jurist, Associate Justice of the Supreme Court of the United States 1950 – Loris Kessel, Swiss racing driver (d. 2010) 1950 – Daniel Paillé, Canadian academic and politician 1951 – John Abizaid, American general 1952 – Annette O'Toole, American actress 1952 – Bernard Stiegler, French philosopher and academic (d. 2020) 1953 – Barry Sonnenfeld, American cinematographer, director, and producer 1953 – Alberto Zaccheroni, Italian footballer and manager 1954 – Jeff Porcaro, American drummer, songwriter, and producer (d. 1992) 1955 – Don Hasselbeck, American football player and sportscaster 1955 – Humayun Akhtar Khan, Pakistani politician, 5th Commerce Minister of Pakistan 1957 – David Gower, English cricketer and sportscaster 1957 – Denise Nickerson, American actress (d. 2019) 1958 – D. Boon, American singer and musician (d. 1985) 1959 – Helmuth Duckadam, Romanian footballer 1961 – Susan Boyle, Scottish singer 1961 – Sergio Scariolo, Italian professional basketball head coach 1961 – Mark White, English singer-songwriter and guitarist 1962 – Mark Shulman, American author 1962 – Chris Grayling, English journalist and politician, Lord High Chancellor of Great Britain 1962 – Samboy Lim, Filipino basketball player and manager 1962 – Phillip Schofield, English television host 1963 – Teodoro de Villa Diaz, Filipino guitarist and songwriter (d. 1988) 1963 – Aprille Ericsson-Jackson, American aerospace engineer 1964 – Erik Breukink, Dutch cyclist and manager 1964 – Kevin Duckworth, American basketball player (d. 2008) 1964 – John Morris, English cricketer 1964 – José Rodrigues dos Santos, Portuguese journalist, author, and educator 1965 – Jane Adams, American film, television, and stage actress 1965 – Mark Jackson, American basketball player and coach 1966 – Chris Evans, English radio and television host 1966 – Mehmet Özdilek, Turkish footballer and manager 1967 – Nicola Roxon, Australian lawyer and politician, 34th Attorney-General for Australia 1968 – Mike Baird, Australian politician, 44th Premier of New South Wales 1968 – Andreas Schnaas, German actor and director 1968 – Alexander Stubb, Finnish academic and politician, 43rd Prime Minister of Finland 1969 – Lev Lobodin, Ukrainian-Russian decathlete 1969 – Andrew Vlahov, Australian basketball player 1969 – Dean Windass, English footballer and manager 1970 – Brad Meltzer, American author, screenwriter, and producer 1971 – Sonia Bisset, Cuban javelin thrower 1971 – Shinji Nakano, Japanese racing driver 1972 – Darren McCarty, Canadian ice hockey player and sportscaster 1972 – Jesse Tobias, American guitarist and songwriter 1973 – Christian Finnegan, American comedian and actor 1973 – Stephen Fleming, New Zealand cricketer and coach 1973 – Rachel Maddow, American journalist and author 1974 – Hugo Ibarra, Argentinian footballer and manager 1975 – John Butler, American-Australian singer-songwriter and producer 1975 – Magdalena Maleeva, Bulgarian tennis player 1976 – Hazem El Masri, Lebanese-Australian rugby league player and educator 1976 – David Gilliland, American race car driver 1976 – David Oyelowo, English actor 1976 – Clarence Seedorf, Dutch-Brazilian footballer and manager 1976 – Yuka Yoshida, Japanese tennis player 1977 – Vitor Belfort, Brazilian-American boxer and mixed martial artist 1977 – Haimar Zubeldia, Spanish cyclist 1978 – Antonio de Nigris, Mexican footballer (d. 2009) 1978 – Mirka Federer, Slovak-Swiss tennis player 1978 – Anamaria Marinca, Romanian-English actress 1978 – Etan Thomas, American basketball player 1979 – Ruth Beitia, Spanish high jumper 1980 – Dennis Kruppke, German footballer 1980 – Randy Orton, American wrestler 1980 – Bijou Phillips, American actress and model 1981 – Antonis Fotsis, Greek basketball player 1981 – Bjørn Einar Romøren, Norwegian 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Aleister Crowley (; born Edward Alexander Crowley; 12 October 1875 – 1 December 1947) was an English occultist, philosopher, ceremonial magician, poet, painter, novelist and mountaineer. He founded the religion of Thelema, identifying himself as the prophet entrusted with guiding humanity into the Æon of Horus in the early 20th century. A prolific writer, he published widely over the course of his life. Born to a wealthy family in Royal Leamington Spa, Warwickshire, Crowley rejected his parents' fundamentalist Christian Plymouth Brethren faith to pursue an interest in Western esotericism. He was educated at Trinity College at the University of Cambridge, where he focused his attentions on mountaineering and poetry, resulting in several publications. Some biographers allege that here he was recruited into a British intelligence agency, further suggesting that he remained a spy throughout his life. In 1898, he joined the esoteric Hermetic Order of the Golden Dawn, where he was trained in ceremonial magic by Samuel Liddell MacGregor Mathers and Allan Bennett. He went mountaineering in Mexico with Oscar Eckenstein, before studying Hindu and Buddhist practices in India. In 1904, he married Rose Edith Kelly and they honeymooned in Cairo, Egypt, where Crowley claimed to have been contacted by a supernatural entity named Aiwass, who provided him with The Book of the Law, a sacred text that served as the basis for Thelema. Announcing the start of the Æon of Horus, The Book declared that its followers should "Do what thou wilt" and seek to align themselves with their True Will through the practice of ceremonial magic. After the unsuccessful 1905 Kanchenjunga expedition and a visit to India and China, Crowley returned to Britain, where he attracted attention as a prolific author of poetry, novels and occult literature. In 1907, he and George Cecil Jones co-founded an esoteric order, the A∴A∴, through which they propagated Thelema. After spending time in Algeria, in 1912 he was initiated into another esoteric order, the German-based Ordo Templi Orientis (O.T.O.), rising to become the leader of its British branch, which he reformulated in accordance with his Thelemite beliefs. Through the O.T.O., Thelemite groups were established in Britain, Australia and North America. Crowley spent the First World War in the United States, where he took up painting and campaigned for the German war effort against Britain, later revealing that he had infiltrated the pro-German movement to assist the British intelligence services. In 1920, he established the Abbey of Thelema, a religious commune in Cefalù, Sicily where he lived with various followers. His libertine lifestyle led to denunciations in the British press, and the Italian government evicted him in 1923. He divided the following two decades between France, Germany and England, and continued to promote Thelema until his death. Crowley gained widespread notoriety during his lifetime, being a drug user, bisexual and an individualist social critic. Crowley has remained a highly influential figure over Western esotericism and the counterculture of the 1960s and continues to be considered a prophet in Thelema. He is the subject of various biographies and academic studies. Early life Youth Crowley was born Edward Alexander Crowley at 30 Clarendon Square in Royal Leamington Spa, Warwickshire, on 12 October 1875. His father, Edward Crowley (1829–1887), was trained as an engineer, but his share in a lucrative family brewing business, Crowley's Alton Ales, had allowed him to retire before his son was born. His mother, Emily Bertha Bishop (1848–1917), came from a Devonshire-Somerset family and had a strained relationship with her son; she described him as "the Beast", a name that he revelled in. The couple had been married at London's Kensington Registry Office in November 1874, and were evangelical Christians. Crowley's father had been born a Quaker, but had converted to the Exclusive Brethren, a faction of a Christian fundamentalist group known as the Plymouth Brethren; Emily likewise converted upon marriage. Crowley's father was particularly devout, spending his time as a travelling preacher for the sect and reading a chapter from the Bible to his wife and son after breakfast every day. Following the death of their baby daughter in 1880, in 1881 the Crowleys moved to Redhill, Surrey. At the age of 8, Crowley was sent to H.T. Habershon's evangelical Christian boarding school in Hastings, and then to Ebor preparatory school in Cambridge, run by the Reverend Henry d'Arcy Champney, whom Crowley considered a sadist. In March 1887, when Crowley was 11, his father died of tongue cancer. Crowley described this as a turning point in his life, and he always maintained an admiration of his father, describing him as "my hero and my friend". Inheriting a third of his father's wealth, he began misbehaving at school and was harshly punished by Champney; Crowley's family removed him from the school when he developed albuminuria. He then attended Malvern College and Tonbridge School, both of which he despised and left after a few terms. He became increasingly sceptical regarding Christianity, pointing out inconsistencies in the Bible to his religious teachers, and went against the Christian morality of his upbringing by smoking, masturbating, and having sex with prostitutes from whom he contracted gonorrhea. Sent to live with a Brethren tutor in Eastbourne, he undertook chemistry courses at Eastbourne College. Crowley developed interests in chess, poetry, and mountain climbing, and in 1894 climbed Beachy Head before visiting the Alps and joining the Scottish Mountaineering Club. The following year he returned to the Bernese Alps, climbing the Eiger, Trift, Jungfrau, Mönch, and Wetterhorn. Cambridge University: 1895–1898 Having adopted the name of Aleister over Edward, in October 1895 Crowley began a three-year course at Trinity College, Cambridge, where he was entered for the Moral Science Tripos studying philosophy. With approval from his personal tutor, he changed to English literature, which was not then part of the curriculum offered. Crowley spent much of his time at university engaged in his pastimes, becoming president of the chess club and practising the game for two hours a day; he briefly considered a professional career as a chess player. Crowley also embraced his love of literature and poetry, particularly the works of Richard Francis Burton and Percy Bysshe Shelley. Many of his own poems appeared in student publications such as The Granta, Cambridge Magazine, and Cantab. He continued his mountaineering, going on holiday to the Alps to climb every year from 1894 to 1898, often with his friend Oscar Eckenstein, and in 1897 he made the first ascent of the Mönch without a guide. These feats led to his recognition in the Alpine mountaineering community. Crowley had his first significant mystical experience while on holiday in Stockholm in December 1896. Several biographers, including Lawrence Sutin, Richard Kaczynski, and Tobias Churton, believed that this was the result of Crowley's first same-sex sexual experience, which enabled him to recognize his bisexuality. At Cambridge, Crowley maintained a vigorous sex life with women—largely with female prostitutes, from one of whom he caught syphilis—but eventually he took part in same-sex activities, despite their illegality. In October 1897, Crowley met Herbert Charles Pollitt, president of the Cambridge University Footlights Dramatic Club, and the two entered into a relationship. They broke apart because Pollitt did not share Crowley's increasing interest in Western esotericism, a break-up that Crowley would regret for many years. In 1897, Crowley travelled to Saint Petersburg in Russia, later saying that he was trying to learn Russian as he was considering a future diplomatic career there. In October 1897, a brief illness triggered considerations of mortality and "the futility of all human endeavour", and Crowley abandoned all thoughts of a diplomatic career in favour of pursuing an interest in the occult. In March 1898, he obtained A.E. Waite's The Book of Black Magic and of Pacts, and then Karl von Eckartshausen's The Cloud Upon the Sanctuary, furthering his occult interests. That same year, Crowley privately published 100 copies of his poem Aceldama: A Place to Bury Strangers In, but it was not a particular success. Aceldama was issued by Leonard Smithers. That same year, Crowley published a string of other poems, including White Stains, a Decadent collection of erotic poetry that was printed abroad lest its publication be prohibited by the British authorities. In July 1898, he left Cambridge, not having taken any degree at all despite a "first class" showing in his 1897 exams and consistent "second class honours" results before that. The Golden Dawn: 1898–1899 In August 1898, Crowley was in Zermatt, Switzerland, where he met the chemist Julian L. Baker, and the two began discussing their common interest in alchemy. Back in London, Baker introduced Crowley to George Cecil Jones, Baker's brother-in-law and a fellow member of the occult society known as the Hermetic Order of the Golden Dawn, which had been founded in 1888. Crowley was initiated into the Outer Order of the Golden Dawn on 18 November 1898 by the group's leader, Samuel Liddell MacGregor Mathers. The ceremony took place in the Golden Dawn's Isis-Urania Temple held at London's Mark Masons Hall, where Crowley took the magical motto and name "Frater Perdurabo", which he interpreted as "I shall endure to the end". Crowley moved into his own luxury flat at 67–69 Chancery Lane and soon invited a senior Golden Dawn member, Allan Bennett, to live with him as his personal magical tutor. Bennett taught Crowley more about ceremonial magic and the ritual use of drugs, and together they performed the rituals of the Goetia, until Bennett left for South Asia to study Buddhism. In November 1899, Crowley purchased Boleskine House in Foyers on the shore of Loch Ness in Scotland. He developed a love of Scottish culture, describing himself as the "Laird of Boleskine", and took to wearing traditional highland dress, even during visits to London. He continued writing poetry, publishing Jezebel and Other Tragic Poems, Tales of Archais, Songs of the Spirit, Appeal to the American Republic, and Jephthah in 1898–99; most gained mixed reviews from literary critics, although Jephthah was considered a particular critical success. Crowley soon progressed through the lower grades of the Golden Dawn, and was ready to enter the group's inner Second Order. He was unpopular in the group; his bisexuality and libertine lifestyle had gained him a bad reputation, and he had developed feuds with some of the members, including W. B. Yeats. When the Golden Dawn's London lodge refused to initiate Crowley into the Second Order, he visited Mathers in Paris, who personally admitted him into the Adeptus Minor Grade. A schism had developed between Mathers and the London members of the Golden Dawn, who were unhappy with his autocratic rule. Acting under Mathers' orders, Crowley—with the help of his mistress and fellow initiate Elaine Simpson—attempted to seize the Vault of the Adepts, a temple space at 36 Blythe Road in West Kensington, from the London lodge members. When the case was taken to court, the judge ruled in favour of the London lodge, as they had paid for the space's rent, leaving both Crowley and Mathers isolated from the group. Mexico, India, Paris, and marriage: 1900–1903 In 1900, Crowley travelled to Mexico via the United States, settling in Mexico City and starting a relationship with a local woman. Developing a love of the country, he continued experimenting with ceremonial magic, working with John Dee's Enochian invocations. He later claimed to have been initiated into Freemasonry while there, and he wrote a play based on Richard Wagner's Tannhäuser as well as a series of poems, published as Oracles (1905). Eckenstein joined him later in 1900, and together they climbed several mountains, including Iztaccihuatl, Popocatepetl, and Colima, the latter of which they had to abandon owing to a volcanic eruption. Leaving Mexico, Crowley headed to San Francisco before sailing for Hawaii aboard the Nippon Maru. On the ship, he had a brief affair with a married woman named Mary Alice Rogers; saying he had fallen in love with her, he wrote a series of poems about the romance, published as Alice: An Adultery (1903). Briefly stopping in Japan and Hong Kong, Crowley reached Ceylon, where he met with Allan Bennett, who was there studying Shaivism. The pair spent some time in Kandy before Bennett decided to become a Buddhist monk in the Theravada tradition, travelling to Burma to do so. Crowley decided to tour India, devoting himself to the Hindu practice of Rāja yoga, from which he claimed to have achieved the spiritual state of dhyana. He spent much of this time studying at the Meenakshi Temple in Madura. At this time he also wrote poetry which was published as The Sword of Song (1904). He contracted malaria, and had to recuperate from the disease in Calcutta and Rangoon. In 1902, he was joined in India by Eckenstein and several other mountaineers: Guy Knowles, H. Pfannl, V. Wesseley, and Jules Jacot-Guillarmod. Together, the Eckenstein-Crowley expedition attempted K2, which had never been climbed. On the journey, Crowley was afflicted with influenza, malaria, and snow blindness, and other expedition members were also struck with illness. They reached an altitude of before turning back. Having arrived in Paris in November 1902, he socialized with his friend the painter Gerald Kelly, and through him became a fixture of the Parisian arts scene. Whilst there, Crowley wrote a series of poems on the work of an acquaintance, the sculptor Auguste Rodin. These poems were later published as Rodin in Rime (1907). One of those frequenting this milieu was W. Somerset Maugham, who after briefly meeting Crowley later used him as a model for the character of Oliver Haddo in his novel The Magician (1908). He returned to Boleskine in April 1903. In August, Crowley wed Gerald Kelly's sister Rose Edith Kelly in a "marriage of convenience" to prevent her from entering an arranged marriage; the marriage appalled the Kelly family and damaged his friendship with Gerald. Heading on a honeymoon to Paris, Cairo, and then Ceylon, Crowley fell in love with Rose and worked to prove his affections. While on his honeymoon, he wrote her a series of love poems, published as Rosa Mundi and other Love Songs (1906), as well as authoring the religious satire Why Jesus Wept (1904). Developing Thelema Egypt and The Book of the Law: 1904 In February 1904, Crowley and Rose arrived in Cairo. Claiming to be a prince and princess, they rented an apartment in which Crowley set up a temple room and began invoking ancient Egyptian deities, while studying Islamic mysticism and Arabic. According to Crowley's later account, Rose regularly became delirious and informed him "they are waiting for you." On 18 March, she explained that "they" were the god Horus, and on 20 March proclaimed that "the Equinox of the Gods has come". She led him to a nearby museum, where she showed him a seventh-century BCE mortuary stele known as the Stele of Ankh-ef-en-Khonsu; Crowley thought it important that the exhibit's number was 666, the Number of the Beast in Christian belief, and in later years termed the artefact the "Stele of Revealing." According to Crowley's later statements, on 8 April he heard a disembodied voice claiming to be that of Aiwass, the messenger of Horus, or Hoor-Paar-Kraat. Crowley said that he wrote down everything the voice told him over the course of the next three days, and titled it Liber AL vel Legis or The Book of the Law. The book proclaimed that humanity was entering a new Aeon, and that Crowley would serve as its prophet. It stated that a supreme moral law was to be introduced in this Aeon, "Do what thou wilt shall be the whole of the Law," and that people should learn to live in tune with their Will. This book, and the philosophy that it espoused, became the cornerstone of Crowley's religion, Thelema. Crowley said that at the time he had been unsure what to do with The Book of the Law. Often resenting it, he said that he ignored the instructions which the text commanded him to perform, which included taking the Stele of Revealing from the museum, fortifying his own island, and translating the book into all the world's languages. According to his account, he instead sent typescripts of the work to several occultists he knew, putting the manuscript away and ignoring it. Kanchenjunga and China: 1905–1906 Returning to Boleskine, Crowley came to believe that Mathers had begun using magic against him, and the relationship between the two broke down. On 28 July 1905, Rose gave birth to Crowley's first child, a daughter named Lilith, with Crowley writing the pornographic Snowdrops from a Curate's Garden to entertain his recuperating wife. He also founded a publishing company through which to publish his poetry, naming it the Society for the Propagation of Religious Truth in parody of the Society for Promoting Christian Knowledge. Among its first publications were Crowley's Collected Works, edited by Ivor Back, an old friend of Crowley's who was both a practicing surgeon and an enthusiast of literature. His poetry often received strong reviews (either positive or negative), but never sold well. In an attempt to gain more publicity, he issued a reward of £100 for the best essay on his work. The winner of this was J. F. C. Fuller, a British Army officer and military historian, whose essay, The Star in the West (1907), heralded Crowley's poetry as some of the greatest ever written. Crowley decided to climb Kanchenjunga in the Himalayas of Nepal, widely recognised as the world's most treacherous mountain. The collaboration between Jacot-Guillarmod, Charles Adolphe Reymond, Alexis Pache, and Alcesti C. Rigo de Righi, the expedition was marred by much argument between Crowley and the others, who thought that he was reckless. They eventually mutinied against Crowley's control, with the other climbers heading back down the mountain as nightfall approached despite Crowley's warnings that it was too dangerous. Subsequently, Pache and several porters were killed in an accident, something for which Crowley was widely blamed by the mountaineering community. Spending time in Moharbhanj, where he took part in big-game hunting and wrote the homoerotic work The Scented Garden, Crowley met up with Rose and Lilith in Calcutta before being forced to leave India after non-lethally shooting two men who tried to mug him. Briefly visiting Bennett in Burma, Crowley and his family decided to tour Southern China, hiring porters and a nanny for the purpose. Crowley smoked opium throughout the journey, which took the family from Tengyueh through to Yungchang, Tali, Yunnanfu, and then Hanoi. On the way, he spent much time on spiritual and magical work, reciting the "Bornless Ritual", an invocation to his Holy Guardian Angel, on a daily basis. While Rose and Lilith returned to Europe, Crowley headed to Shanghai to meet old friend Elaine Simpson, who was fascinated by The Book of the Law; together they performed rituals in an attempt to contact Aiwass. Crowley then sailed to Japan and Canada, before continuing to New York City, where he unsuccessfully solicited support for a second expedition up Kanchenjunga. Upon arrival in Britain, Crowley learned that his daughter Lilith had died of typhoid in Rangoon, something he later blamed on Rose's increasing alcoholism. Under emotional distress, his health began to suffer, and he underwent a series of surgical operations. He began short-lived romances with actress Vera "Lola" Neville (née Snepp) and author Ada Leverson, while Rose gave birth to Crowley's second daughter, Lola Zaza, in February 1907. The A∴A∴ and The Holy Books of Thelema: 1907–1909 With his old mentor George Cecil Jones, Crowley continued performing the Abramelin rituals at the Ashdown Park Hotel in Coulsdon, Surrey. Crowley claimed that in doing so he attained samadhi, or union with Godhead, thereby marking a turning point in his life. Making heavy use of hashish during these rituals, he wrote an essay on "The Psychology of Hashish" (1909) in which he championed the drug as an aid to mysticism. He also claimed to have been contacted once again by Aiwass in late October and November 1907, adding that Aiwass dictated two further texts to him, "Liber VII" and "Liber Cordis Cincti Serpente", both of which were later classified in the corpus of The Holy Books of Thelema. Crowley wrote down more Thelemic Holy Books during the last two months of the year, including "Liber LXVI", "Liber Arcanorum", "Liber Porta Lucis, Sub Figura X", "Liber Tau", "Liber Trigrammaton" and "Liber DCCCXIII vel Ararita", which he again claimed to have received from a preternatural source. Crowley stated that in June 1909, when the manuscript of The Book of the Law was rediscovered at Boleskine, he developed the opinion that Thelema represented objective truth. Crowley's inheritance was running out. Trying to earn money, he was hired by George Montagu Bennett, the Earl of Tankerville, to help protect him from witchcraft; recognising Bennett's paranoia as being based in his cocaine addiction, Crowley took him on holiday to France and Morocco to recuperate. In 1907, he also began taking in paying students, whom he instructed in occult and magical practice. Victor Neuburg, whom Crowley met in February 1907, became his sexual partner and closest disciple; in 1908 the pair toured northern Spain before heading to Tangier, Morocco. The following year Neuburg stayed at Boleskine, where he and Crowley engaged in sadomasochism. Crowley continued to write prolifically, producing such works of poetry as Ambergris, Clouds Without Water, and Konx Om Pax, as well as his first attempt at an autobiography, The World's Tragedy. Recognizing the popularity of short horror stories, Crowley wrote his own, some of which were published, and he also published several articles in Vanity Fair, a magazine edited by his friend Frank Harris. He also wrote Liber 777, a book of magical and Qabalistic correspondences that borrowed from Mathers and Bennett. In November 1907, Crowley and Jones decided to found an occult order to act as a successor to the Hermetic Order of the Golden Dawn, being aided in doing so by Fuller. The result was the A∴A∴. The group's headquarters and temple were situated at 124 Victoria Street in central London, and their rites borrowed much from those of the Golden Dawn, but with an added Thelemic basis. Its earliest members included solicitor Richard Noel Warren, artist Austin Osman Spare, Horace Sheridan-Bickers, author George Raffalovich, Francis Henry Everard Joseph Feilding, engineer Herbert Edward Inman, Kenneth Ward, and Charles Stansfeld Jones. In March 1909, Crowley began production of a biannual periodical titled The Equinox. He billed this periodical, which was to become the "Official Organ" of the A∴A∴, as "The Review of Scientific Illuminism". Crowley had become increasingly frustrated with Rose's alcoholism, and in November 1909 he divorced her on the grounds of his own adultery. Lola was entrusted to Rose's care; the couple remained friends and Rose continued to live at Boleskine. Her alcoholism worsened, and as a result she was institutionalized in September 1911. Algeria and the Rites of Eleusis: 1909–1911 In November 1909, Crowley and Neuburg travelled to Algeria, touring the desert from El Arba to Aumale, Bou Saâda, and then Dā'leh Addin, with Crowley reciting the Quran on a daily basis. During the trip he invoked the thirty aethyrs of Enochian magic, with Neuburg recording the results, later published in The Equinox as The Vision and the Voice. Following a mountaintop sex magic ritual, Crowley also performed an evocation to the demon Choronzon involving blood sacrifice, and considered the results to be a watershed in his magical career. Returning to London in January 1910, Crowley found that Mathers was suing him for publishing Golden Dawn secrets in The Equinox; the court found in favour of Crowley. The case was widely reported in the press, with Crowley gaining wider fame. Crowley enjoyed this, and played up to the sensationalist stereotype of being a Satanist and advocate of human sacrifice, despite being neither. The publicity attracted new members to the A∴A∴, among them Frank Bennett, James Bayley, Herbert Close, and James Windram. The Australian violinist Leila Waddell soon became Crowley's lover. Deciding to expand his teachings to a wider audience, Crowley developed the Rites of Artemis, a public performance of magic and symbolism featuring A∴A∴ members personifying various deities. It was first performed at the A∴A∴ headquarters, with attendees given a fruit punch containing peyote to enhance their experience. Various members of the press attended, and reported largely positively on it. In October and November 1910, Crowley decided to stage something similar, the Rites of Eleusis, at Caxton Hall, Westminster; this time press reviews were mixed. Crowley came under particular criticism from West de Wend Fenton, editor of The Looking Glass newspaper, who called him "one of the most blasphemous and cold-blooded villains of modern times". Fenton's articles suggested that Crowley and Jones were involved in homosexual activity; Crowley did not mind, but Jones unsuccessfully sued for libel. Fuller broke off his friendship and involvement with Crowley over the scandal, and Crowley and Neuburg returned to Algeria for further magical workings. The Equinox continued publishing, and various books of literature and poetry were also published under its imprint, like Crowley's Ambergris, The Winged Beetle, and The Scented Garden, as well as Neuburg's The Triumph of Pan and Ethel Archer's The Whirlpool. In 1911, Crowley and Waddell holidayed in Montigny-sur-Loing, where he wrote prolifically, producing poems, short stories, plays, and 19 works on magic and mysticism, including the two final Holy Books of Thelema. In Paris, he met Mary Desti, who became his next "Scarlet Woman", with the two undertaking magical workings in St. Moritz; Crowley believed that one of the Secret Chiefs, Ab-ul-Diz, was speaking through her. Based on Desti's statements when in trance, Crowley wrote the two-volume Book 4 (1912–13) and at the time developed the spelling "magick" in reference to the paranormal phenomenon as a means of distinguishing it from the stage magic of illusionists. Ordo Templi Orientis and the Paris Working: 1912–1914 In early 1912, Crowley published The Book of Lies, a work of mysticism that biographer Lawrence Sutin described as "his greatest success in merging his talents as poet, scholar, and magus". The German occultist Theodor Reuss later accused him of publishing some of the secrets of his own occult order, the Ordo Templi Orientis (O.T.O.), within The Book. Crowley convinced Reuss that the similarities were coincidental, and the two became friends. Reuss appointed Crowley as head of the O.T.O's British branch, the Mysteria Mystica Maxima (MMM), and at a ceremony in Berlin Crowley adopted the magical name of Baphomet and was proclaimed "X° Supreme Rex and Sovereign Grand Master General of Ireland, Iona, and all the Britons". With Reuss' permission, Crowley set about advertising the MMM and re-writing many O.T.O. rituals, which were then based largely on Freemasonry; his incorporation of Thelemite elements proved controversial in the group. Fascinated by the O.T.O's emphasis on sex magic, Crowley devised a magical working based on anal sex and incorporated it into the syllabus for those O.T.O. members who had been initiated into the eleventh degree. In March 1913, Crowley acted as producer for The Ragged Ragtime Girls, a group of female violinists led by Waddell, as they performed at London's Old Tivoli theatre. They subsequently performed in Moscow for six weeks, where Crowley had a sadomasochistic relationship with the Hungarian Anny Ringler. In Moscow, Crowley continued to write plays and poetry, including "Hymn to Pan", and the Gnostic Mass, a Thelemic ritual that became a key part of O.T.O. liturgy. Churton suggested that Crowley had travelled to Moscow on the orders of British intelligence to spy on revolutionary elements in the city. In January 1914, Crowley and Neuburg settled into an apartment in Paris, where the former was involved in the controversy surrounding Jacob Epstein's new monument to Oscar Wilde. Together Crowley and Neuburg performed the six-week "Paris Working", a period of intense ritual involving strong drug use in which they invoked the gods Mercury and Jupiter. As part of the ritual, the couple performed acts of sex magic together, at times being joined by journalist Walter Duranty. Inspired by the results of the Working, Crowley wrote Liber Agapé, a treatise on sex magic. Following the Paris Working, Neuburg began to distance himself from Crowley, resulting in an argument in which Crowley cursed him. United States: 1914–1919 By 1914, Crowley was living a hand-to-mouth existence, relying largely on donations from A∴A∴ members and dues payments made to O.T.O. In May, he transferred ownership of Boleskine House to the MMM for financial reasons, and in July he went mountaineering in the Swiss Alps. During this time the First World War broke out. After recuperating from a bout of phlebitis, Crowley set sail for the United States aboard the RMS Lusitania in October 1914. Arriving in New York City, he moved into a hotel and began earning money writing for the American edition of Vanity Fair and undertaking freelance work for the famed astrologer Evangeline Adams. In the city, he continued experimenting with sex magic, through the use of masturbation, female prostitutes, and male clients of a Turkish bathhouse; all of these encounters were documented in his diaries. Professing to be of Irish ancestry and a supporter of Irish independence from Great Britain, Crowley began to espouse support for Germany in their war against Britain. He became involved in New York's pro-German movement, and in January 1915 German spy George Sylvester Viereck employed him as a writer for his propagandist paper, The Fatherland, which was dedicated to keeping the US neutral in the conflict. In later years, detractors denounced Crowley as a traitor to Britain for this action. Crowley entered into a relationship with Jeanne Robert Foster, with whom he toured the West Coast. In Vancouver, headquarters of the North American O.T.O., he met with Charles Stansfeld Jones and Wilfred Talbot Smith to discuss the propagation of Thelema on the continent. In Detroit he experimented with Peyote at Parke-Davis, then visited Seattle, San Francisco, Santa Cruz, Los Angeles, San Diego, Tijuana, and the Grand Canyon, before returning to New York. There he befriended Ananda Coomaraswamy and his wife Alice Richardson; Crowley and Richardson performed sex magic in April 1916, following which she became pregnant and then miscarried. Later that year he took a "magical retirement" to a cabin by Lake Pasquaney owned by Evangeline Adams. There, he made heavy use of drugs and undertook a ritual after which he proclaimed himself "Master Therion". He also wrote several short stories based on J.G. Frazer's The Golden Bough and a work of literary criticism, The Gospel According to Bernard Shaw. In December, he moved to New Orleans, his favourite US city, before spending February 1917 with evangelical Christian relatives in Titusville, Florida. Returning to New York City, he moved in with artist and A∴A∴ member Leon Engers Kennedy in May, learning of his mother's death. After the collapse of The Fatherland, Crowley continued his association with Viereck, who appointed him contributing editor of arts journal The International. Crowley used it to promote Thelema, but it soon ceased publication. He then moved to the studio apartment of Roddie Minor, who became his partner and Scarlet Woman. Through their rituals, which Crowley called "The Amalantrah Workings", he believed that they were contacted by a preternatural entity named Lam. The relationship soon ended. In 1918, Crowley went on a magical retreat in the wilderness of Esopus Island on the Hudson River. Here, he began a translation of the Tao Te Ching, painted Thelemic slogans on the riverside cliffs, and—he later claimed—experienced past life memories of being Ge Xuan, Pope Alexander VI, Alessandro Cagliostro, and Eliphas Levi. Back in New York City, he moved to Greenwich Village, where he took Leah Hirsig as his lover and next Scarlet Woman. He took up painting as a hobby, exhibiting his work at the Greenwich Village Liberal Club and attracting the attention of the New York Evening World. With the financial assistance of sympathetic Freemasons, Crowley revived The Equinox with the first issue of volume III, known as The Blue Equinox. He spent mid-1919 on a climbing holiday in Montauk before returning to London in December. Abbey of Thelema: 1920–1923 Now destitute and back in London, Crowley came under attack from the tabloid John Bull, which labelled him traitorous "scum" for his work with the German war effort; several friends aware of his intelligence work urged him to sue, but he decided not to. When he was suffering from asthma, a doctor prescribed him heroin, to which he soon became addicted. In January 1920, he moved to Paris, renting a house in Fontainebleau with Leah Hirsig; they were soon joined in a ménage à trois by Ninette Shumway, and also (in living arrangement) by Leah's newborn daughter Anne "Poupée" Leah. Crowley had ideas of forming a community of Thelemites, which he called the Abbey of Thelema after the Abbaye de Thélème in François Rabelais' satire Gargantua and Pantagruel. After consulting the I Ching, he chose Cefalù (on Sicily, Italy) as a location, and after arriving there, began renting the old Villa Santa Barbara as his Abbey on 2 April. Moving to the commune with Hirsig, Shumway, and their children Hansi, Howard, and Poupée, Crowley described the scenario as "perfectly happy ... my idea of heaven." They wore robes, and performed rituals to the sun god Ra at set times during the day, also occasionally performing the Gnostic Mass; the rest of the day they were left to follow their own interests. Undertaking widespread correspondences, Crowley continued to paint, wrote a commentary on The Book of the Law, and revised the third part of Book 4. He offered a libertine education for the children, allowing them to play all day and witness acts of sex magic. He occasionally travelled to Palermo to visit rent boys and buy supplies, including drugs; his heroin addiction came to dominate his life, and cocaine began to erode his nasal cavity. There was no cleaning rota, and wild dogs and cats wandered throughout the building, which soon became unsanitary. Poupée died in October 1920, and Ninette gave birth to a daughter, Astarte Lulu Panthea, soon afterwards. New followers continued to arrive at the Abbey to be taught by Crowley. Among them was film star Jane Wolfe, who arrived in July 1920, where she was initiated into the A∴A∴ and became Crowley's secretary. Another was Cecil Frederick Russell, who often argued with Crowley, disliking the same-sex sexual magic that he was required to perform, and left after a year. More conducive was the Australian Thelemite Frank Bennett, who also spent several months at the Abbey. In February 1922, Crowley returned to Paris for a retreat in an unsuccessful attempt to kick his heroin addiction. He then went to London in search of money, where he published articles in The English Review criticising the Dangerous Drugs Act 1920 and wrote a novel, Diary of a Drug Fiend, completed in July. On publication, it received mixed reviews; he was lambasted by the Sunday Express, which called for its burning and used its influence to prevent further reprints. Subsequently, a young Thelemite named Raoul Loveday moved to the Abbey with his wife Betty May; while Loveday was devoted to Crowley, May detested him and life at the commune. She later said that Loveday was made to drink the blood of a sacrificed cat, and that they were required to cut themselves with razors every time they used the pronoun "I". Loveday drank from a local polluted stream, soon developing a liver infection resulting in his death in February 1923. Returning to London, May told her story to the press. John Bull proclaimed Crowley "the wickedest man in the world" and "a man we'd like to hang", and although Crowley deemed many of their accusations against him to be slanderous, he was unable to afford the legal fees to sue them. As a result, John Bull continued its attack, with its stories being repeated in newspapers throughout Europe and in North America. The Fascist government of Benito Mussolini learned of Crowley's activities, and in April 1923 he was given a deportation notice forcing him to leave Italy; without him, the Abbey closed. Later life Tunisia, Paris, and London: 1923–1929 Crowley and Hirsig went to Tunis, where, dogged by continuing poor health, he unsuccessfully tried again to give up heroin, and began writing what he termed his "autohagiography", The Confessions of Aleister Crowley. They were joined in Tunis by the Thelemite Norman Mudd, who became Crowley's public relations consultant. Employing a local boy, Mohammad ben Brahim, as his servant, Crowley went with him on a retreat to Nefta, where they performed sex magic together. In January 1924, Crowley travelled to Nice, France, where he met with Frank Harris, underwent a series of nasal operations, and visited the Institute for the Harmonious Development of Man and had a positive opinion of its founder, George Gurdjieff. Destitute, he took on a wealthy student, Alexander Zu Zolar, before taking on another American follower, Dorothy Olsen. Crowley took Olsen back to Tunisia for a magical retreat in Nefta, where he also wrote To Man (1924), a declaration of his own status as a prophet entrusted with bringing Thelema to humanity. After spending the winter in Paris, in early 1925 Crowley and Olsen returned to Tunis, where he wrote The Heart of the Master (1938) as an account of a vision he experienced in a trance. In March Olsen became pregnant, and Hirsig was called to take care of her; she miscarried, following which Crowley took Olsen back to France. Hirsig later distanced herself from Crowley, who then denounced her. According to Crowley, Reuss had named him head of the O.T.O. upon his death, but this was challenged by a leader of the German O.T.O., Heinrich Tränker. Tränker called the Hohenleuben Conference in Thuringia, Germany, which Crowley attended. There, prominent members like Karl Germer and Martha Küntzel championed Crowley's leadership, but other key figures like Albin Grau, Oskar Hopfer, and Henri Birven backed Tränker by opposing it, resulting in a split in the O.T.O. Moving to Paris, where he broke with Olsen in 1926, Crowley went through a large number of lovers over the following years, with whom he experimented in sex magic. Throughout, he was dogged by poor health, largely caused by his heroin and cocaine addictions. In 1928, Crowley was introduced to young Englishman Israel Regardie, who embraced Thelema and became Crowley's secretary for the next three years. That year, Crowley also met Gerald Yorke, who began organising Crowley's finances but never became a Thelemite. He also befriended the journalist Tom Driberg; Driberg did not accept Thelema either. It was here that Crowley also published one of his most significant works, Magick in Theory and Practice, which received little attention at the time. In December 1928 Crowley met the Nicaraguan Maria Teresa Sanchez (Maria Teresa Ferrari de Miramar). Crowley was deported from France by the authorities, who disliked his reputation and feared that he was a German agent. So that she could join him in Britain, Crowley married Sanchez in August 1929. Now based in London, Mandrake Press agreed to publish his autobiography in a limited edition six-volume set, also publishing his novel Moonchild and book of short stories The Stratagem. Mandrake went into liquidation in November 1930, before the entirety of Crowley's Confessions could be published. Mandrake's owner P.R. Stephenson meanwhile wrote The Legend of Aleister Crowley, an analysis of the media coverage surrounding him. Berlin and London: 1930–1938 In April 1930, Crowley moved to Berlin, where he took Hanni Jaegar as his magical partner; the relationship was troubled. In September he went to Lisbon in Portugal to meet the poet Fernando Pessoa. There, he decided to fake his own death, doing so with Pessoa's help at the Boca do Inferno rock formation. He then returned to Berlin, where he reappeared three weeks later at the opening of his art exhibition at the Gallery Neumann-Nierendorf. Crowley's paintings fitted with the fashion for German Expressionism; few of them sold, but the press reports were largely favourable. In August 1931, he took Bertha Busch as his new lover; they had a violent relationship, and often physically assaulted one another. He continued to have affairs with both men and women while in the city, and met with famous people like Aldous Huxley and Alfred Adler. After befriending him, in January 1932 he took the communist Gerald Hamilton as a lodger, through whom he was introduced to many figures within the Berlin far left; it is possible that he was operating as a spy for British intelligence at this time, monitoring the communist movement. Crowley left Busch and returned to London, where he took Pearl Brooksmith as his new Scarlet Woman. Undergoing further nasal surgery, it was here in 1932 that he was invited to be guest of honour at Foyles' Literary Luncheon, also being invited by Harry Price to speak at the National Laboratory of Psychical Research. In need of money, he launched a series of court cases against people whom he believed to have libelled him, some of which proved successful. He gained much publicity for his lawsuit against Constable and Co for publishing Nina Hamnett's Laughing Torso (1932)—a book he claimed libelled him by referring to his occult practice as black magic—but lost the case. The court case added to Crowley's financial problems, and in February 1935 he was declared bankrupt. During the hearing, it was revealed that Crowley had been spending three times his income for several years. Crowley developed a friendship with Deidre Patricia Doherty; she offered to bear his child, who was born in May 1937. Named Randall Gair, Crowley nicknamed him Aleister Atatürk. He died in a car accident in 2002 at the age of 65. Crowley continued to socialize with friends, holding curry parties in which he cooked particularly spicy food for them. In 1936, he published his first book in six years, The Equinox of the Gods, which contained a facsimile of The Book of the Law and was considered to be volume III, number 3, of The Equinox periodical. The work sold well, resulting in a second print run. In 1937, he gave a series of public lectures on yoga in Soho. Crowley was now living largely off contributions supplied by the O.T.O.'s Agape Lodge in California, led by rocket scientist John Whiteside "Jack" Parsons. Crowley was intrigued by the rise of Nazism in Germany, and influenced by his friend Martha Küntzel believed that Adolf Hitler might convert to Thelema; when the Nazis abolished the German O.T.O. and imprisoned Germer, who fled to the US, Crowley then lambasted Hitler as a black magician. Second World War and death: 1939–1947 When the Second World War broke out, Crowley wrote to the Naval Intelligence Division offering his services, but they declined. He associated with a variety of figures in Britain's intelligence community at the time, including Dennis Wheatley, Roald Dahl, Ian Fleming, and Maxwell Knight, and claimed to have been behind the "V for Victory" sign first used by the BBC; this has never been proven. In 1940, his asthma worsened, and with his German-produced medication unavailable, he returned to using heroin, once again becoming addicted. As the Blitz hit London, Crowley relocated to Torquay, where he was briefly admitted to hospital with asthma, and entertained himself with visits to the local chess club. Tiring of Torquay, he returned to London, where he was visited by American Thelemite Grady McMurtry, to whom Crowley awarded the title of "Hymenaeus Alpha". He stipulated that though Germer would be his immediate successor, McMurty should succeed Germer as head of the O.T.O. after the latter's death. With O.T.O. initiate Lady Frieda Harris, Crowley developed plans to produce a tarot card set, designed by him and painted by Harris. Accompanying this was a book, published in a limited edition as The Book of Thoth by Chiswick Press in 1944. To aid the war effort, he wrote a proclamation on the rights of humanity, Liber Oz, and a poem for the liberation of France, Le Gauloise. Crowley's final publication during his lifetime was a book of poetry, Olla: An Anthology of Sixty Years of Song. Another of his projects, Aleister Explains Everything, was posthumously published as Magick Without Tears. In April 1944 Crowley briefly moved to Aston Clinton in Buckinghamshire, where he was visited by the poet Nancy Cunard, before relocating to Hastings in Sussex, where he took up residence at the Netherwood boarding house. He took a young man named Kenneth Grant as his secretary, paying him in magical teaching rather than wages. He was also introduced to John Symonds, whom he appointed to be his literary executor; Symonds thought little of Crowley, later publishing negative biographies of him. Corresponding with the illusionist Arnold Crowther, it was through him that Crowley was introduced to Gerald Gardner, the future founder of Gardnerian Wicca. They became friends, with Crowley authorising Gardner to revive Britain's ailing O.T.O. Another visitor was Eliza Marian Butler, who interviewed Crowley for her book The Myth of the Magus. Other friends and family also spent time with him, among them Doherty and Crowley's son Aleister Atatürk. On 1 December 1947, Crowley died at Netherwood of chronic bronchitis aggravated by pleurisy and myocardial degeneration, aged 72. His funeral was held at a Brighton crematorium on 5 December; about a dozen people attended, and Louis Wilkinson read excerpts from the Gnostic Mass, The Book of the Law, and "Hymn to Pan". The funeral generated press controversy, and was labelled a Black Mass by the tabloids. Crowley's body was cremated; his ashes were sent to Karl Germer in the US, who buried them in his garden in Hampton, New Jersey. Beliefs and thought Crowley's belief system, Thelema, has been described by scholars as a religion, and more specifically as both a new religious movement, and as a "magico-religious doctrine". It has also been characterized as a form of esotericism and Modern Paganism. Although holding The Book of the Law—which was composed in 1904—as its central text, Thelema took shape as a complete system in the years after 1904. In his autobiography, Crowley claimed that his purpose in life had been to "bring oriental wisdom to Europe and to restore paganism in a purer form", although what he meant by "paganism" was unclear. Crowley also wrote in the 4th Book of Magick about a great pagan Umbral fleet ruled by Ottovius that would be handed down to the great Spartan. The esoteric nature of this was also unclear. Crowley's thought was not always cohesive, and was influenced by a variety of sources, ranging from eastern religious movements and practices like Hindu yoga and Buddhism, scientific naturalism, and various currents within Western esotericism, among them ceremonial magic, alchemy, astrology, Rosicrucianism, Kabbalah, and the Tarot. He was steeped in the esoteric teachings he had learned from the Hermetic Order of the Golden Dawn, although pushed further with his own interpretations and strategies than the Golden Dawn had done. Crowley incorporated concepts and terminology from South Asian religious traditions like yoga and Tantra into his Thelemic system, believing that there was a fundamental underlying resemblance between Western and Eastern spiritual systems. The historian Alex Owen noted that Crowley adhered to the "modus operandi" of the Decadent movement throughout his life. Crowley believed that the twentieth century marked humanity's entry to the Aeon of Horus, a new era in which humans would take increasing control of their destiny. He believed that this Aeon follows on from the Aeon of Osiris, in which paternalistic religions like Christianity, Islam, and Buddhism dominated the world, and that this in turn had followed the Aeon of Isis, which had been maternalistic and dominated by goddess worship. He believed that Thelema was the proper religion of the Aeon of Horus, and also deemed himself to be the prophet of this new Aeon. Thelema revolves around the idea that human beings each have their own True Will that they should discover and pursue, and that this exists in harmony with the Cosmic Will that pervades the universe. Crowley referred to this process of searching and discovery of one's True Will to be "the Great Work" or the attaining of the "knowledge and conversation of the Holy Guardian Angel". His favoured method of doing so was through the performance of the Abramelin operation, a ceremonial magic ritual obtained from a 17th-century grimoire. The moral code of "Do What Thou Wilt" is believed by Thelemites to be the religion's ethical law, although the historian of religion Marco Pasi noted that this was not anarchistic or libertarian in structure, as Crowley saw individuals as part of a wider societal organism. Magick and theology Crowley believed in the objective existence of magic, which he chose to spell as "Magick", which is an archaic spelling of the word. He provided various different definitions of this term over his career. In his book Magick in Theory and Practice, Crowley defined Magick as "the Science and Art of causing change to occur in conformity with Will". He also told his disciple Karl Germer that "Magick is getting into communication with individuals who exist on a higher plane than ours. Mysticism is the raising of oneself to their level." Crowley saw Magick as a third way between religion and science, giving The Equinox the subtitle of The Method of Science; the Aim of Religion. Within that journal, he expressed positive sentiments toward science and the scientific method, and urged magicians to keep detailed records of their magical experiments, having said: "The more scientific the record is, the better." His understanding of magic was also influenced by the work of the anthropologist James Frazer, in particular the belief that magic was a precursor to science in a cultural evolutionary framework. Unlike Frazer, however, Crowley did not see magic as a survival from the past that required eradication, but rather he believed that magic had to be adapted to suit the new age of science. In Crowley's alternative schema, old systems of magic had to decline (per Frazer's framework) so that science and magic could synthesize into magick, which would simultaneously accept the existence of the supernatural and an experimental method. Crowley deliberately adopted an exceptionally broad definition of magick that included almost all forms of technology as magick, adopting an instrumentalist definition of magic, science, and technology. Sexuality played an important role in Crowley's ideas about magick and his practice of it, and has been described as being central to Thelema. He outlined three forms of sex magick—the autoerotic, homosexual, and heterosexual—and argued that such acts could be used to focus the magician's will onto a specific goal such as financial gain or personal creative success. For Crowley, sex was treated as a sacrament, with the consumption of sexual fluids interpreted as a Eucharist. This was often manifested as the Cakes of Light, a biscuit containing either menstrual blood or a mixture of semen and vaginal fluids. The Gnostic Mass is the central religious ceremony within Thelema. Crowley's theological beliefs were not clear. The historian Ronald Hutton noted that some of Crowley's writings could be used to argue that he was an atheist, while some support the idea that he was a polytheist, and others would bolster the idea that he was a mystical monotheist. On the basis of the teachings in The Book of the Law, Crowley described a pantheon of three deities taken from the ancient Egyptian pantheon: Nuit, Hadit, and Ra-Hoor-Khuit. In 1928, he made the claim that all true deities were derived from this trinity. Jason Josephson-Storm has argued that Crowley built on 19th-century attempts to link early Christianity to pre-Christian religions, such as Frazer's Golden Bough, to synthesize Christian theology and Neopaganism while remaining critical of institutional and traditional Christianity. Both during his life and after it, Crowley has been widely described as a Satanist, usually by detractors. Crowley stated he did not consider himself a Satanist, nor did he worship Satan, as he did not accept the Christian world view in which Satan was believed to exist. He nevertheless used Satanic imagery, for instance by describing himself as "the Beast 666" and referring to the Whore of Babylon in his work, while in later life he sent "Antichristmas cards" to his friends. In his writings, Crowley occasionally identified Aiwass as Satan and designated him as "Our Lord God the Devil" at one occasion. The scholar of religion Gordan Djurdjevic stated that Crowley "was emphatically not" a Satanist, "if for no other reason than simply because he did not identify himself as such". Crowley nevertheless expressed strong anti-Christian sentiment, stating that he hated Christianity "as Socialists hate soap", an animosity probably stemming from his experiences among the Plymouth Brethren. He was nevertheless influenced by the King James Bible, especially the Book of Revelation, the impact of which can be seen in his writings. He was also accused of advocating human sacrifice, largely because of a passage in Book 4 in which he stated that "A male child of perfect innocence and high intelligence is the most satisfactory victim" and added that he had sacrificed about 150 every year. This was a tongue-in-cheek reference to ejaculation, something not realized by his critics. Image and opinions Crowley considered himself to be one of the outstanding figures of his time. The historian Ronald Hutton stated that in Crowley's youth, he was "a self-indulgent and flamboyant young man" who "set about a deliberate flouting and provocation of social and religious norms", while being shielded from an "outraged public opinion" by his inherited wealth. Hutton also described Crowley as having both an "unappeasable desire" to take control of any organisation that he belonged to, and "a tendency to quarrel savagely" with those who challenged him. Crowley biographer Martin Booth asserted that Crowley was "self-confident, brash, eccentric, egotistic, highly intelligent, arrogant, witty, wealthy, and, when it suited him, cruel". Similarly, Richard B. Spence noted that Crowley was "capable of immense physical and emotional cruelty". Biographer Lawrence Sutin noted that Crowley exhibited "courage, skill, dauntless energy, and remarkable focus of will" while at the same time showing a "blind arrogance, petty fits of bile, [and] contempt for the abilities of his fellow men". The Thelemite Lon Milo DuQuette noted that Crowley "was by no means perfect" and "often alienated those who loved him dearest." Political opinions Crowley enjoyed being outrageous and flouting conventional morality, with John Symonds noting that he "was in revolt against the moral and religious values of his time". Crowley's political thought was studied by academic Marco Pasi, who noted that for Crowley, socio-political concerns were subordinate to metaphysical and spiritual ones. He was neither on the political left nor right but perhaps best categorized as a "conservative revolutionary" despite not being affiliated with the German-based movement of the same name. Pasi described Crowley's fascination to the extreme ideologies of Nazism and Marxism–Leninism, which aimed to violently overturn society: "What Crowley liked about Nazism and communism, or at least what made him curious about them, was the anti-Christian position and the revolutionary and socially subversive implications of these two movements. In their subversive powers, he saw the possibility of an annihilation of old religious traditions, and the creation of a void that Thelema, subsequently, would be able to fill." Crowley described democracy as an "imbecile and nauseating cult of weakness", and commented that The Book of the Law proclaimed that "there is the master and there is the slave; the noble and the serf; the 'lone wolf' and the herd". In this attitude, he was influenced by the work of Friedrich Nietzsche and by Social Darwinism. Although he had contempt for most of the British aristocracy, he regarded himself as an aristocrat and styled himself as Laird Boleskine, once describing his ideology as "aristocratic communism". Opinions on race and gender Crowley was bisexual, but exhibited a preference for women, with his relationships with men being fewer and mostly in the early part of his life. In particular he had an attraction toward "exotic women", and claimed to have fallen in love on multiple occasions; Kaczynski stated that "when he loved, he did so with his whole being, but the passion was typically short-lived". Even in later life, Crowley was able to attract young bohemian women to be his lovers, largely due to his charisma. He applied the term "Scarlet Woman" to various female lovers whom he believed played an important role in his magical work. During homosexual acts, he usually played 'the passive role', which Booth believed "appealed to his masochistic side". An underlying theme in many of his writings is that spiritual enlightenment arises through transgressing socio-sexual norms. Crowley advocated complete sexual freedom for both men and women. He argued that homosexual and bisexual people should not suppress their sexual orientation, commenting that a person "must not be ashamed or afraid of being homosexual if he happens to be so at heart; he must not attempt to violate his own true nature because of public opinion, or medieval morality, or religious prejudice which would wish he were otherwise." On other issues he adopted a more conservative attitude; he opposed abortion on moral grounds, believing that no woman following her True Will would ever desire one. Biographer Lawrence Sutin stated that "blatant bigotry is a persistent minor element in Crowley's writings". Sutin thought Crowley "a spoiled scion of a wealthy Victorian family who embodied many of the worst John Bull racial and social prejudices of his upper-class contemporaries", noting that he "embodied the contradiction that writhed within many Western intellectuals of the time: deeply held racist viewpoints courtesy of society, coupled with a fascination with people of colour". Crowley is said to have insulted his close Jewish friend Victor Benjamin Neuburg, using antisemitic slurs, and he had mixed opinions about Jewish people as a group. Although he praised their "sublime" poetry and stated that they exhibited "imagination, romance, loyalty, probity and humanity", he also thought that centuries of persecution had led some Jewish people to exhibit "avarice, servility, falseness, cunning and the rest". He was also known to praise various ethnic and cultural groups, for instance he thought that the Chinese people exhibited a "spiritual superiority" to the English, and praised Muslims for exhibiting "manliness, straightforwardness, subtlety, and self-respect". Both critics of Crowley and adherents of Thelema have accused Crowley of sexism. Booth described Crowley as exhibiting a "general misogyny", something the biographer believed arose from Crowley's bad relationship with his mother. Sutin noted that Crowley "largely accepted the notion, implicitly embodied in Victorian sexology, of women as secondary social beings in terms of intellect and sensibility". The scholar of religion Manon Hedenborg White noted that some of Crowley's statements are "undoubtedly misogynist by contemporary standards", but characterized Crowley's attitude toward women as complex and multi-faceted. Crowley's comments on women's role varied dramatically within his written work, even that produced in similar periods. Crowley described women as "moral inferiors" who had to be treated with "firmness, kindness and justice", while also arguing that Thelema was essential to women's emancipation. Intelligence work Biographers Richard B. Spence and Tobias Churton have suggested that Crowley was a spy for the British secret services and that among other things he joined the Golden Dawn under their command to monitor the activities of Mathers, who was known to be a Carlist. Spence suggested that the conflict between Mathers and the London lodge for the temple was part of an intelligence operation to undermine Mathers' authority. Spence has suggested that the purpose of Crowley's trip to Mexico might have been to explore Mexican oil prospects for British intelligence. Spence has suggested that his trip to China was orchestrated as part of a British intelligence scheme to monitor the region's opium trade. Churton suggested that Crowley had travelled to Moscow on the orders of British intelligence to spy on revolutionary elements in the city. Spence and Sutin both claim that Crowley's pro-German work in the United States was actually a cover for him being a double agent for Britain, citing his hyperbolic articles in The Fatherland to make the German lobby appear ridiculous in the eyes of the American public. Spence also claims that Crowley encouraged the German Navy to destroy the Lusitania, informing them that it would ensure the US stayed out of the war, while in reality hoping that it would bring the US into the war on Britain's side. Legacy and influence Crowley has remained an influential figure, both amongst occultists and in popular culture, particularly that of Britain, but also of other parts of the world. In 2002, a BBC poll placed Crowley seventy-third in a list of the 100 Greatest Britons. Richard Cavendish has written of him that "In native talent, penetrating intelligence and determination, Aleister Crowley was the best-equipped magician to emerge since the seventeenth century." The scholar of esotericism Egil Asprem described him as "one of the most well-known figures in modern occultism". The scholar of esotericism Wouter Hanegraaff asserted that Crowley was an extreme representation of "the dark side of the occult", adding that he was "the most notorious occultist magician of the twentieth century". The philosopher John Moore opined that Crowley stood out as a "Modern Master" when compared with other prominent occult figures like George Gurdjieff, P. D. Ouspensky, Rudolf Steiner, or Helena Blavatsky, also describing him as a "living embodiment" of Oswald Spengler's "Faustian Man". Biographer Tobias Churton considered Crowley "a pioneer of consciousness research". Hutton noted that Crowley had "an important place in the history of modern Western responses to Oriental spiritual traditions", while Sutin thought that he had made "distinctly original contributions" to the study of yoga in the West. Thelema continued to develop and spread following Crowley's death. In 1969, the O.T.O. was reactivated in California under the leadership of Grady Louis McMurtry; in 1985 its right to the title was unsuccessfully challenged in court by a rival group, the Society Ordo Templi Orientis, led by Brazilian Thelemite Marcelo Ramos Motta. Another American Thelemite is the filmmaker Kenneth Anger, who had been influenced by Crowley's writings from a young age. In the United Kingdom, Kenneth Grant propagated a tradition known as Typhonian Thelema through his organisation, the Typhonian O.T.O., later renamed the Typhonian Order. Also in Britain, an occultist known as Amado Crowley claimed to be Crowley's son; this has been refuted by academic investigation. Amado argued that Thelema was a false religion created by Crowley to hide his true esoteric teachings, which Amado claimed to be propagating. Several Western esoteric traditions other than Thelema were also influenced by Crowley, with Djurdjevic observing that "Crowley's influence on twentieth-century and contemporary esotericism has been enormous". Gerald Gardner, founder of Gardnerian Wicca, made use of much of Crowley's published material when composing the Gardnerian ritual liturgy, and the Australian witch Rosaleen Norton was also heavily influenced by Crowley's ideas. More widely, Crowley became "a dominant figure" in the modern Pagan community. L. Ron Hubbard, the American founder of Scientology, was involved in Thelema in the early 1940s (with Jack Parsons), and it has been argued that Crowley's ideas influenced some of Hubbard's work. The scholars of religion Asbjørn Dyrendel, James R. Lewis, and Jesper Petersen noted that despite the fact that Crowley was not a Satanist, he "in many ways embodies the pre-Satanist esoteric discourse on Satan and Satanism through his lifestyle and his philosophy", with his "image and ought" becoming an "important influence" on the later development of religious Satanism. For instance, two prominent figures in religious Satanism, Anton LaVey and Michael Aquino, were influenced by Crowley's work. In popular culture Crowley also had a wider influence in British popular culture. After his time in Cefalù which had brought him to public attention in Britain, various "literary Crowleys" appeared: characters in fiction based upon him. One of the earliest was the character of the poet Shelley Arabin in John Buchan's 1926 novel The Dancing Floor. In his novel The Devil Rides Out, the writer Dennis Wheatley used Crowley as a partial basis for the character of Damien Morcata, a portly bald defrocked priest who engages in black magic. The occultist Dion Fortune used Crowley as a basis for characters in her books The Secrets of Doctor Taverner (1926) and The Winged Bull (1935). He was included as one of the figures on the cover art of The Beatles' album Sgt. Pepper's Lonely Hearts Club Band (1967), and his motto of "Do What Thou Wilt" was inscribed on the vinyl of Led Zeppelin's album Led Zeppelin III (1970). Led Zeppelin co-founder Jimmy Page bought Boleskine in 1971, and part of the band's film The Song Remains the Same was filmed in the grounds. He sold it in 1992. Though David Bowie makes but a fleeting reference to Crowley in the lyrics of his song "Quicksand" (1971), it has been suggested that the lyrics of Bowie's No. 1 hit single "Let's Dance" (1983) may substantially paraphrase Crowley's 1923 poem "Lyric of Love to Leah". Ozzy Osbourne and his lyricist Bob Daisley wrote a song titled "Mr. Crowley" (1980). A prophetic quote about the coming of the New Aeon borrowed from Crowley's work Magick in Theory and Practice (1911) has been featured as the opening introduction to the video game Blood Omen: Legacy of Kain (1996). Crowley began to receive scholarly attention from academics in the late 1990s. Bibliography References Footnotes Sources Further reading Crowley, Aleister., John. Symonds, and Kenneth. Grant. The Confessions of Aleister Crowley: an Autohagiography. 1989. London: Arkana. External links Aleister Crowley Collection at the Harry Ransom Center, University of Texas "Aleister Crowley and the Abbey of Thelema in Cefalù" at WondersOfSicily.com, with photos Perdurabo (Where is Aleister Crowley?) – film on the Abbey of Thelema by Carlos Atanes 1875 births 1947 deaths 19th-century English poets 20th-century English novelists Alumni of Trinity College, Cambridge Atlantis proponents English bisexual writers Bisexual sportsmen Bisexual poets Bisexual novelists Bisexual dramatists and playwrights British psychedelic drug advocates Burials in New Jersey Ceremonial magicians Channellers British critics of Christianity Deaths from bronchitis English astrologers English astrological writers English autobiographers English dramatists and playwrights English expatriates in India English expatriates in Switzerland English Freemasons English male dramatists and playwrights English male novelists English mountain climbers English occultists English occult writers English spiritual writers English Thelemites Founders of new religious movements Free love advocates Goetia Hermetic Order of the Golden Dawn Hermetic Qabalists LGBT climbers English LGBT poets English LGBT novelists English LGBT dramatists and playwrights English LGBT sportspeople Members of Ordo Templi Orientis 20th-century mystics Obscenity controversies in literature People educated at Eastbourne College People educated at Malvern College People educated at Tonbridge School People from Leamington Spa People who faked their own death Prophets Tarotologists Thelema Victorian writers 19th-century pseudonymous writers 20th-century pseudonymous writers British people of World War I	8
The afterlife or life after death is a purported existence in which the essential part of an individual's stream of consciousness or identity continues to exist after the death of their physical body. The surviving essential aspect varies between belief systems; it may be some partial element, or the entire soul or spirit, which carries with it one's personal identity. Belief in an afterlife is in contrast to the belief in oblivion after death. In some views, this continued existence takes place in a spiritual realm, while in others, the individual may be reborn into this world and begin the life cycle over again, likely with no memory of what they have done in the past. In this latter view, such rebirths and deaths may take place over and over again continuously until the individual gains entry to a spiritual realm or otherworld. Major views on the afterlife derive from religion, esotericism and metaphysics. Some belief systems, such as those in the Abrahamic tradition, hold that the dead go to a specific place (e.g. Paradise) after death, as determined by God, based on their actions and beliefs during life. In contrast, in systems of reincarnation, such as those in the Indian religions, the nature of the continued existence is determined directly by the actions of the individual in the ended life. Different metaphysical models Theist immortalists generally believe some afterlife awaits people when they die. Members of some generally non-theistic religions believe in an afterlife without reference to a deity. The Sadducees were an ancient Jewish sect that generally believed that there was a God but no existence after death. Many religions, whether they believe in the soul's existence in another world like Christianity, Islam, and many pagan belief systems, or reincarnation like many forms of Hinduism and Buddhism, believe that one's status in the afterlife is a consequence of one's conduct during life. Reincarnation Reincarnation is the philosophical or religious concept that an aspect of a living being starts a new life in a different physical body or form after each death. This concept is also known as rebirth or transmigration and is part of the Saṃsāra/karma doctrine of cyclic existence. Samsara refers to the process in which souls (jivas) go through a sequence of human and animal forms. Traditional Hinduism teaches that each life helps the soul (jivas) learn until the soul becomes purified to the point of enlightenment (unity with the cosmos). All major Indian religions, namely Buddhism, Hinduism, Jainism, and Sikhism have their own interpretations of the idea of reincarnation. The human idea of reincarnation is found in many diverse ancient cultures, and a belief in rebirth/metempsychosis was held by historic Greek figures, such as Pythagoras and Plato. It is also a common belief of various ancient and modern religions such as Spiritism, theosophy, and Eckankar. It is found as well in many tribal societies around the world, in places such as Australia, East Asia, Siberia, and South America. Although the majority of denominations within the Abrahamic religions of Judaism, Christianity, and Islam do not believe that individuals reincarnate, particular groups within these religions do refer to reincarnation; these groups include the mainstream historical and contemporary followers of Kabbalah, the Cathars, Alawites, the Druze, and the Rosicrucians. The historical relations between these sects and the beliefs about reincarnation that were characteristic of neoplatonism, Orphism, Hermeticism, Manicheanism, and Gnosticism of the Roman era as well as the Indian religions have been the subject of recent scholarly research. Unity Church and its founder Charles Fillmore teach reincarnation. Rosicrucians speak of a life review period occurring immediately after death and before entering the afterlife's planes of existence (before the silver cord is broken), followed by a judgment, more akin to a final review or end report over one's life. Heaven and Hell Heaven, the heavens, seven heavens, pure lands, Tian, Jannah, Valhalla, or the Summerland, is a common religious, cosmological, or transcendent place where beings such as gods, angels, jinn, saints, or venerated ancestors are said to originate, be enthroned, or live. According to the beliefs of some religions, heavenly beings can descend to earth or incarnate, and earthly beings can ascend to heaven in the afterlife, or in exceptional cases, enter heaven alive. Heaven is often described as a "higher place", the holiest place, a paradise, in contrast to hell or the underworld or the "low places", and universally or conditionally accessible by earthly beings according to various standards of divinity, goodness, piety, faith or other virtues or right beliefs or the will of God. Some believe in the possibility of a heaven on Earth in a world to come. In Hinduism, heaven is considered as Svarga loka. There are seven positive regions the soul can go to after death and seven negative regions. After completing its stay in the respective region, the soul is subjected to rebirth in different living forms according to its karma. This cycle can be broken after a soul achieves Moksha or Nirvana. Any place of existence, either of humans, souls or deities, outside the tangible world (heaven, hell, or other) is referred to as otherworld. Hell, in many religious and folkloric traditions, is a place of torment and punishment in the afterlife. Religions with a linear divine history often depict hell as an eternal destination, while religions with a cyclic history often depict a hell as an intermediary period between incarnations. Typically, these traditions locate hell in another dimension or under the Earth's surface and often include entrances to hell from the land of the living. Other afterlife destinations include purgatory and limbo. Traditions that do not conceive of the afterlife as a place of punishment or reward merely describe hell as an abode of the dead, the grave, a neutral place (for example, Sheol or Hades) located under the surface of Earth. Ancient religions Ancient Egyptian religion The afterlife played an important role in Ancient Egyptian religion, and its belief system is one of the earliest known in recorded history. When the body died, parts of its soul known as ka (body double) and the ba (personality) would go to the Kingdom of the Dead. While the soul dwelt in the Fields of Aaru, Osiris demanded work as restitution for the protection he provided. Statues were placed in the tombs to serve as substitutes for the deceased. Arriving at one's reward in afterlife was a demanding ordeal, requiring a sin-free heart and the ability to recite the spells, passwords, and formulae of the Book of the Dead. In the Hall of Two Truths, the deceased's heart was weighed against the Shu feather of truth and justice taken from the headdress of the goddess Ma'at. If the heart was lighter than the feather, they could pass on, but if it were heavier they would be devoured by the demon Ammit. Egyptians also believed that being mummified and put in a sarcophagus (an ancient Egyptian "coffin" carved with complex symbols and designs, as well as pictures and hieroglyphs) was the only way to have an afterlife. What are referred to as the Coffin Texts, are inscribed on a coffin and serve as a guide for the challenges in the afterlife. The Coffin texts are more or less a duplication of the Pyramid Texts, which would serve as a guide for Egyptian pharaohs or queens in the afterlife. Only if the corpse had been properly embalmed and entombed in a mastaba, could the dead live again in the Fields of Yalu and accompany the Sun on its daily ride. Due to the dangers the afterlife posed, the Book of the Dead was placed in the tomb with the body as well as food, jewelry, and 'curses'. They also used the "opening of the mouth". Ancient Egyptian civilization was based on religion. The belief in the rebirth after death became the driving force behind funeral practices; for them, death was a temporary interruption rather than complete cessation of life. Eternal life could be ensured by means like piety to the gods, preservation of the physical form through mummification, and the provision of statuary and other funerary equipment. Each human consisted of the physical body, the ka, the ba, and the akh. The Name and Shadow were also living entities. To enjoy the afterlife, all these elements had to be sustained and protected from harm. On 30 March 2010, a spokesman for the Egyptian Culture Ministry claimed it had unearthed a large red granite door in Luxor with inscriptions by User, a powerful adviser to the 18th Dynasty Queen Hatshepsut who ruled between 1479 BC and 1458 BC, the longest of any woman. It believes the false door is a 'door to the Afterlife'. According to the archaeologists, the door was reused in a structure in Roman Egypt. Ancient Greek and Roman religions The Greek god Hades is known in Greek mythology as the king of the underworld, a place where souls live after death. The Greek god Hermes, the messenger of the gods, would take the dead soul of a person to the underworld (sometimes called Hades or the House of Hades). Hermes would leave the soul on the banks of the River Styx, the river between life and death. Charon, also known as the ferry-man, would take the soul across the river to Hades, if the soul had gold: Upon burial, the family of the dead soul would put coins under the deceased's tongue. Once crossed, the soul would be judged by Aeacus, Rhadamanthus and King Minos. The soul would be sent to Elysium, Tartarus, or Asphodel Fields. The Elysian Fields were for the ones that lived pure lives. It consisted of green fields, valleys and mountains, everyone there was peaceful and contented, and the Sun always shone there. Tartarus was for the people that blasphemed against the gods or were rebellious and consciously evil. In Tartarus, the soul would be punished by being burned in lava or stretched on racks. The Asphodel Fields were for a varied selection of human souls including those whose sins equaled their goodness, those who were indecisive in their lives, and those who were not judged. Some heroes of Greek legend are allowed to visit the underworld. The Romans had a similar belief system about the afterlife, with Hades becoming known as Pluto. In the ancient Greek myth about the Labours of Heracles, the hero Heracles had to travel to the underworld to capture Cerberus, the three-headed guard dog, as one of his tasks. In Dream of Scipio, Cicero describes what seems to be an out of body experience, of the soul traveling high above the Earth, looking down at the small planet, from far away. In Book VI of Virgil's Aeneid, the hero, Aeneas, travels to the underworld to see his father. By the River Styx, he sees the souls of those not given a proper burial, forced to wait by the river until someone buries them. While down there, along with the dead, he is shown the place where the wrongly convicted reside, the fields of sorrow where those who committed suicide and now regret it reside, including Aeneas' former lover, the warriors and shades, Tartarus (where the titans and powerful non-mortal enemies of the Olympians reside) where he can hear the groans of the imprisoned, the palace of Pluto, and the fields of Elysium where the descendants of the divine and bravest heroes reside. He sees the river of forgetfulness, Lethe, which the dead must drink to forget their life and begin anew. Lastly, his father shows him all of the future heroes of Rome who will live if Aeneas fulfills his destiny in founding the city. Other eschatological views populate the ancient-Greek worldview. For instance, Plato argued for reincarnation in several dialogues, including the Timaeus. Norse religion The Poetic and Prose Eddas, the oldest sources for information on the Norse concept of the afterlife, vary in their description of the several realms that are described as falling under this topic. The most well-known are: Valhalla: (lit. "Hall of the Slain" i.e. "the Chosen Ones") Half the warriors who die in battle join the god Odin who rules over a majestic hall called Valhalla in Asgard. Fólkvangr: (lit. "Field of the Host") The other half join the goddess Freyja in a great meadow known as Fólkvangr. Niflhel: (lit. "The Dark" or "Misty Hel"). Niflhel is believed to be a place of punishment, where the oathbreakers and other wicked people go. Hel: (lit. "The Covered Hall"). Hel was the daughter of god Loki and her kingdom was located in downward and northward. Snorri Sturluson's Gylfaginning tells of evil men going to Niflhel via Hel. Abrahamic religions Judaism Sheol Sheol, in the Hebrew Bible, is a place of darkness (Job x. 21, 22) to which all the dead go, both the righteous and the unrighteous, regardless of the moral choices made in life, (Gen. xxxvii. 36; Ezek. xxxii.; Isa. xiv.; Job xxx. 23), a place of stillness, (Ps. lxxxviii. 13, xciv. 17; Eccl. ix. 10), at the longest possible distance from heaven (Job xi. 8; Amos ix. 2; Ps. cxxxix. 8). The inhabitants of Sheol were the "shades" (rephaim), entities without personality or strength. Under some circumstances they were thought to be able to be contacted by the living, as the Witch of Endor contacts the shade of Samuel for Saul, but such practices were forbidden (Deuteronomy 18:10). While the Hebrew Bible appears to describe Sheol as the permanent place of the dead, in the Second Temple period (roughly 500 BC – 70 AD) a more diverse set of ideas developed. In some texts, Sheol is considered to be the home of both the righteous and the wicked, separated into respective compartments; in others, it was considered a place of punishment, meant for the wicked dead alone. When the Hebrew scriptures were translated into Greek in ancient Alexandria around 200 BC, the word "Hades" (the Greek underworld) was substituted for Sheol. This is reflected in the New Testament where Hades is both the underworld of the dead and the personification of the evil it represents. World to Come The Talmud offers a number of thoughts relating to the afterlife. After death, the soul is brought for judgment. Those who have led pristine lives enter immediately into the Olam Haba or world to come. Most do not enter the world to come immediately, but experience a period of reflection of their earthly actions and are made aware of what they have done wrong. Some view this period as being a "re-schooling", with the soul gaining wisdom as one's errors are reviewed. Others view this period to include spiritual discomfort for past wrongs. At the end of this period, not longer than one year, the soul then takes its place in the world to come. Although discomforts are made part of certain Jewish conceptions of the afterlife, the concept of eternal damnation is not a tenet of the Jewish afterlife. According to the Talmud, extinction of the soul is reserved for a far smaller group of malicious and evil leaders, either whose very evil deeds go way beyond norms, or who lead large groups of people to utmost evil. This is also part of Maimonides' 13 principles of faith. Maimonides describes the Olam Haba in spiritual terms, relegating the prophesied physical resurrection to the status of a future miracle, unrelated to the afterlife or the Messianic era. According to Maimonides, an afterlife continues for the soul of every human being, a soul now separated from the body in which it was "housed" during its earthly existence. The Zohar describes Gehenna not as a place of punishment for the wicked but as a place of spiritual purification for souls. Reincarnation in Jewish tradition Although there is no reference to reincarnation in the Talmud or any prior writings, according to rabbis such as Avraham Arieh Trugman, reincarnation is recognized as being part and parcel of Jewish tradition. Trugman explains that it is through oral tradition that the meanings of the Torah, its commandments and stories, are known and understood. The classic work of Jewish mysticism, the Zohar, is quoted liberally in all Jewish learning; in the Zohar the idea of reincarnation is mentioned repeatedly. Trugman states that in the last five centuries the concept of reincarnation, which until then had been a much hidden tradition within Judaism, was given open exposure. Shraga Simmons commented that within the Bible itself, the idea [of reincarnation] is intimated in Deut. 25:5–10, Deut. 33:6 and Isaiah 22:14, 65:6. Yirmiyahu Ullman wrote that reincarnation is an "ancient, mainstream belief in Judaism". The Zohar makes frequent and lengthy references to reincarnation. Onkelos, a righteous convert and authoritative commentator of the same period, explained the verse, "Let Reuben live and not die ..." (Deuteronomy 33:6) to mean that Reuben should merit the World to Come directly, and not have to die again as a result of being reincarnated. Torah scholar, commentator and kabbalist, Nachmanides (Ramban 1195–1270), attributed Job's suffering to reincarnation, as hinted in Job's saying "God does all these things twice or three times with a man, to bring back his soul from the pit to... the light of the living' (Job 33:29, 30)." Reincarnation, called gilgul, became popular in folk belief, and is found in much Yiddish literature among Ashkenazi Jews. Among a few kabbalists, it was posited that some human souls could end up being reincarnated into non-human bodies. These ideas were found in a number of Kabbalistic works from the 13th century, and also among many mystics in the late 16th century. Martin Buber's early collection of stories of the Baal Shem Tov's life includes several that refer to people reincarnating in successive lives. Among well known (generally non-kabbalist or anti-kabbalist) rabbis who rejected the idea of reincarnation are Saadia Gaon, David Kimhi, Hasdai Crescas, Yedayah Bedershi (early 14th century), Joseph Albo, Abraham ibn Daud, the Rosh and Leon de Modena. Saadia Gaon, in Emunoth ve-Deoth (Hebrew: "beliefs and opinions") concludes Section VI with a refutation of the doctrine of metempsychosis (reincarnation). While rebutting reincarnation, Saadia Gaon further states that Jews who hold to reincarnation have adopted non-Jewish beliefs. By no means do all Jews today believe in reincarnation, but belief in reincarnation is not uncommon among many Jews, including Orthodox. Other well-known rabbis who are reincarnationists include Yonassan Gershom, Abraham Isaac Kook, Talmud scholar Adin Steinsaltz, DovBer Pinson, David M. Wexelman, Zalman Schachter, and many others. Reincarnation is cited by authoritative biblical commentators, including Ramban (Nachmanides), Menachem Recanti and Rabbenu Bachya. Among the many volumes of Yitzchak Luria, most of which come down from the pen of his primary disciple, Chaim Vital, are insights explaining issues related to reincarnation. His Shaar HaGilgulim, "The Gates of Reincarnation", is a book devoted exclusively to the subject of reincarnation in Judaism. Rabbi Naftali Silberberg of The Rohr Jewish Learning Institute notes that "Many ideas that originate in other religions and belief systems have been popularized in the media and are taken for granted by unassuming Jews." Christianity Mainstream Christianity professes belief in the Nicene Creed, and English versions of the Nicene Creed in current use include the phrase: "We look for the resurrection of the dead, and the life of the world to come." When questioned by the Sadducees about the resurrection of the dead (in a context relating to who one's spouse would be if one had been married several times in life), Jesus said that marriage will be irrelevant after the resurrection as the resurrected will be like the angels in heaven. Jesus also maintained that the time would come when the dead would hear the voice of the Son of God, and all who were in the tombs would come out; those who have heard His "[commandments] and believes in the one who sent [Him]" to the resurrection of life, but those who do not to the resurrection of condemnation. The Book of Enoch describes Sheol as divided into four compartments for four types of the dead: the faithful saints who await resurrection in Paradise, the merely virtuous who await their reward, the wicked who await punishment, and the wicked who have already been punished and will not be resurrected on Judgment Day. The Book of Enoch is considered apocryphal by most denominations of Christianity and all denominations of Judaism. The book of 2 Maccabees gives a clear account of the dead awaiting a future resurrection and judgment in addition to prayers and offerings for the dead to remove the burden of sin. The author of Luke recounts the story of Lazarus and the rich man, which shows people in Hades awaiting the resurrection either in comfort or torment. The author of the Book of Revelation writes about God and the angels versus Satan and demons in an epic battle at the end of times when all souls are judged. There is mention of ghostly bodies of past prophets, and the transfiguration. The non-canonical Acts of Paul and Thecla speak of the efficacy of prayer for the dead so that they might be "translated to a state of happiness". Hippolytus of Rome pictures the underworld (Hades) as a place where the righteous dead, awaiting in the bosom of Abraham their resurrection, rejoice at their future prospect, while the unrighteous are tormented at the sight of the "lake of unquenchable fire" into which they are destined to be cast. Gregory of Nyssa discusses the long-before believed possibility of purification of souls after death. Pope Gregory I repeats the concept, articulated over a century earlier by Gregory of Nyssa that the saved suffer purification after death, in connection with which he wrote of "purgatorial flames". The noun "purgatorium" (Latin: place of cleansing) is used for the first time to describe a state of painful purification of the saved after life. The same word in adjectival form (purgatorius -a -um, cleansing), which appears also in non-religious writing, was already used by Christians such as Augustine of Hippo and Pope Gregory I to refer to an after-death cleansing. During the Age of Enlightenment, theologians and philosophers presented various philosophies and beliefs. A notable example is Emanuel Swedenborg who wrote some 18 theological works which describe in detail the nature of the afterlife according to his claimed spiritual experiences, the most famous of which is Heaven and Hell. His report of life there covers a wide range of topics, such as marriage in heaven (where all angels are married), children in heaven (where they are raised by angel parents), time and space in heaven (there are none), the after-death awakening process in the World of Spirits (a place halfway between Heaven and Hell and where people first wake up after death), the allowance of a free will choice between Heaven or Hell (as opposed to being sent to either one by God), the eternity of Hell (one could leave but would never want to), and that all angels or devils were once people on earth. The Catholic Church The Catholic conception of the afterlife teaches that after the body dies, the soul is judged, the righteous and free of sin enter Heaven. However, those who die in unrepented mortal sin go to hell. In the 1990s, the Catechism of the Catholic Church defined hell not as punishment imposed on the sinner but rather as the sinner's self-exclusion from God. Unlike other Christian groups, the Catholic Church teaches that those who die in a state of grace, but still carry venial sin, go to a place called Purgatory where they undergo purification to enter Heaven. Limbo Despite popular opinion, Limbo, which was elaborated upon by theologians beginning in the Middle Ages, was never recognized as a dogma of the Catholic Church, yet, at times, it has been a very popular theological theory within the Church. Limbo is a theory that unbaptized but innocent souls, such as those of infants, virtuous individuals who lived before Jesus Christ was born on earth, or those that die before baptism exist in neither Heaven nor Hell proper. Therefore, these souls neither merit the beatific vision, nor are subjected to any punishment, because they are not guilty of any personal sin although they have not received baptism, so still bear original sin. So they are generally seen as existing in a state of natural, but not supernatural, happiness, until the end of time. In other Christian denominations it has been described as an intermediate place or state of confinement in oblivion and neglect. Purgatory The notion of purgatory is associated particularly with the Catholic Church. In the Catholic Church, all those who die in God's grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven or the final purification of the elect, which is entirely different from the punishment of the damned. The tradition of the church, by reference to certain texts of scripture, speaks of a "cleansing fire" although it is not always called purgatory. Anglicans of the Anglo-Catholic tradition generally also hold to the belief. John Wesley, the founder of Methodism, believed in an intermediate state between death and the resurrection of the dead and in the possibility of "continuing to grow in holiness there", but Methodism does not officially affirm this belief and denies the possibility of helping by prayer any who may be in that state. Orthodox Christianity The Orthodox Church is intentionally reticent on the afterlife, as it acknowledges the mystery especially of things that have not yet occurred. Beyond the second coming of Jesus, bodily resurrection, and final judgment, all of which is affirmed in the Nicene Creed (325 CE), Orthodoxy does not teach much else in any definitive manner. Unlike Western forms of Christianity, however, Orthodoxy is traditionally non-dualist and does not teach that there are two separate literal locations of heaven and hell, but instead acknowledges that "the 'location' of one's final destiny—heaven or hell—as being figurative." Instead, Orthodoxy teaches that the final judgment is one's uniform encounter with divine love and mercy, but this encounter is experienced multifariously depending on the extent to which one has been transformed, partaken of divinity, and is therefore compatible or incompatible with God. "The monadic, immutable, and ceaseless object of eschatological encounter is therefore the love and mercy of God, his glory which infuses the heavenly temple, and it is the subjective human reaction which engenders multiplicity or any division of experience." For instance, St. Isaac the Syrian observes in his Ascetical Homilies that "those who are punished in Gehenna, are scourged by the scourge of love. ... The power of love works in two ways: it torments sinners ... [as] bitter regret. But love inebriates the souls of the sons of Heaven by its delectability." In this sense, the divine action is always, immutably, and uniformly love and if one experiences this love negatively, the experience is then one of self-condemnation because of free will rather than condemnation by God. Orthodoxy therefore uses the description of Jesus' judgment in John 3:19–21 as their model: "19 And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil. 20 For everyone who does wicked things hates the light and does not come to the light, lest his works should be exposed. 21 But whoever does what is true comes to the light, so that it may be clearly seen that his works have been carried out in God." As a characteristically Orthodox understanding, then, Fr. Thomas Hopko writes, "[I]t is precisely the presence of God's mercy and love which cause the torment of the wicked. God does not punish; he forgives... . In a word, God has mercy on all, whether all like it or not. If we like it, it is paradise; if we do not, it is hell. Every knee will bend before the Lord. Everything will be subject to Him. God in Christ will indeed be "all and in all," with boundless mercy and unconditional pardon. But not all will rejoice in God's gift of forgiveness, and that choice will be judgment, the self-inflicted source of their sorrow and pain." Moreover, Orthodoxy includes a prevalent tradition of apokatastasis, or the restoration of all things in the end. This has been taught most notably by Origen, but also many other Church fathers and Saints, including Gregory of Nyssa. The Second Council of Constantinople (553 CE) affirmed the orthodoxy of Gregory of Nyssa while simultaneously condemning Origen's brand of universalism because it taught the restoration back to our pre-existent state, which Orthodoxy doesn't teach. It is also a teaching of such eminent Orthodox theologians as Olivier Clément, Metropolitan Kallistos Ware, and Bishop Hilarion Alfeyev. Although apokatastasis is not a dogma of the church but instead a theologoumenon, it is no less a teaching of the Orthodox Church than its rejection. As Met. Kallistos Ware explains, "It is heretical to say that all must be saved, for this is to deny free will; but, it is legitimate to hope that all may be saved," as insisting on torment without end also denies free will. The Church of Jesus Christ of Latter-day Saints Joseph F. Smith of the Church of Jesus Christ of Latter-day Saints presents an elaborate vision of the afterlife. It is revealed as the scene of an extensive missionary effort by righteous spirits in paradise to redeem those still in darkness—a spirit prison or "hell" where the spirits of the dead remain until judgment. It is divided into two parts: Spirit Prison and Paradise. Together these are also known as the Spirit World (also Abraham's Bosom; see Luke 16:19–25). They believe that Christ visited spirit prison (1 Peter 3:18–20) and opened the gate for those who repent to cross over to Paradise. This is similar to the Harrowing of Hell doctrine of some mainstream Christian faiths. Both Spirit Prison and Paradise are temporary according to Latter-day Saint beliefs. After the resurrection, spirits are assigned "permanently" to three degrees of heavenly glory, determined by how they lived – Celestial, Terrestrial, and Telestial. (1 Cor 15:44–42; Doctrine and Covenants, Section 76) Sons of Perdition, or those who have known and seen God and deny it, will be sent to the realm of Satan, which is called Outer Darkness, where they shall live in misery and agony forever. However, according to the beliefs of the Church of Jesus Christ of Latter Day Saints, most persons lack the amount of knowledge to commit the Eternal sin and are therefore incapable of becoming sons of perdition. The Celestial Kingdom is believed to be a place where the righteous can live eternally with their families. Progression does not end once one has entered the Celestial Kingdom, but extends eternally. According to "True to the Faith" (a handbook on doctrines in the LDS faith), "The celestial kingdom is the place prepared for those who have "received the testimony of Jesus" and been "made perfect through Jesus the mediator of the new covenant, who wrought out this perfect atonement through the shedding of his own blood" (Doctrine and Covenants, 76:51, 69). To inherit this gift, we must receive the ordinances of salvation, keep the commandments, and repent of our sins." Jehovah's Witnesses Jehovah's Witnesses occasionally use terms such as "afterlife" to refer to any hope for the dead, but they understand Ecclesiastes 9:5 to preclude belief in an immortal soul. Individuals judged by God to be wicked, such as in the Great Flood or at Armageddon, are given no hope of an afterlife. However, they believe that after Armageddon there will be a bodily resurrection of "both righteous and unrighteous" dead (but not the "wicked"). Survivors of Armageddon and those who are resurrected are then to gradually restore earth to a paradise. After Armageddon, unrepentant sinners are punished with eternal death (non-existence). Seventh-day Adventists The Seventh-day Adventist Church's beliefs regarding the afterlife differ from other Christian churches. Rather than ascend to Heaven or descend to Hell, Adventists believe the dead "remain unconscious until the return of Christ in judgement". The concept that the dead remain dead until resurrection is one of the fundamental beliefs of Seventh-day Adventism. Adventists believe that death is an unconscious state (a "sleep"). This is based on Matt. 9:24; Mark 5:39; John 11:11–14; 1 Cor. 15:51, 52; 1 Thess. 4:13–17; 2 Peter 3:4; Eccl. 9:5, 6, 10. At death, all consciousness ends. The dead person does not know anything and does not do anything. They believe that death is a decreation, or an undoing of what was created. This is described in Ecclesiastes 12:7: "When a person dies, the body turns to dust again, and the spirit goes back to God, who gave it." The spirit of every person who dies—whether saved or unsaved—returns to God at death. The spirit that returns to God at death is the breath of life. Islam The Quran (the holy book of Islam), emphasizes the insignificance of worldly life (ḥayāt ad-dunyā usually translated as "this world") vis-a-vis the hereafter. A central doctrine of Islamic faith is the Last Day (al-yawm al-ākhir, also known by other names), on which the world will come to an end and God will raise all mankind (as well as the jinn) from the dead and evaluate their worldly actions. The resurrected will be judged according to their deeds, records of which are kept on two books compiled for every human being—one for their good deeds and one for their evil ones. Having been judged, the resurrected will cross the bridge of As-Sirāt over the pit of hell; when the condemned attempt to they will be made to fall off into hellfire below; while the righteous will have no trouble and continue on to their eternal abode of heaven. Afterlife in Islam actually begins before the Last Day. After death, humans will be questioned about their faith by two angels, Munkar and Nakīr. Those who die as martyrs go immediately to paradise. Others who have died and been buried, will receive a taste of their eternal reward from the al-qabr or "the grave" (compare the Jewish concept of Sheol). Those bound for hell will suffer "punishment of the grave", while those bound for heaven will find the grave "peaceful and blessed". Islamic scripture — the Quran and hadith (reports of the words and deeds of the Islamic Prophet Muhammad who is believed to have visited heaven and hell during his Isra and Mi'raj journey) – give vivid descriptions of the pleasures of paradise (Jannah) and sufferings of hell (Jahannam). The gardens of jannah have cool shade adorned couchs and cushions rich carpets spread out, cups full of wine and every meat and fruit . Men will be provided with perpetually youthful, beautiful ḥūr, "untouched beforehand by man or jinn", with large, beautiful eyes . (In recent years some have argued that the term ḥūr refers both to pure men and pure women, and/or that Quranic references to "immortal boys" (, ) or "young men" () (ghilmān, wildān, and suqāh) who serve wine and meals to the blessed, are the male equivalents of hur.) In contrast, those in Jahannam will dwell in a land infested with thousands of serpents and scorpions; be "burnt" by "scorching fire" and when "their skins are roasted through, We shall change them for fresh skins" to repeat the process forever ; they will have nothing to drink but "boiling water and running sores" ; their cries of remorse and pleading for forgiveness will be in vain . Traditionally jannah and jahannam are thought to have different levels. Eight gates and eight levels in Jannah, where the higher the level the better it is and the happier you are. Jahannam possess seven layers. Each layer more horrible than the one above. The Quran teaches that the purpose of Man's creation is to worship God and God alone. Those it describes as being punished in hell are "most typically", unbelievers, including those who worship others besides Allah , those who deny the divine origin of the Quran , or the coming of Judgement Day . Straightforward crimes/sins against other people are also grounds for going to hell: the murder of a believer , usury (Q.2:275), devouring the property of an orphan , slander , particularly of a chaste woman . However it is a common belief among Muslims that whatever crimes/sins Muslims may have committed, their punishment in hell will be temporary. Only unbelievers will reside in hell permanently. Thus Jahannam combines both the concept of an eternal hell (for unbelievers), and what is known in Christian Catholicism as purgatory (for believers eventually destined for heaven after punishment for their sins). The common belief holds that Jahannam coexists with the temporal world. Mainstream Islam teaches the continued existence of the soul and a transformed physical existence after death. The resurrection that will take place on the Last Day is physical, and is explained by suggesting that God will re-create the decayed body ("Have they not realized that Allah, Who created the heavens and the earth, can ˹easily˺ re-create them?" ). Ahmadiyya Ahmadi Muslims believe that the afterlife is not material but of a spiritual nature. According to Mirza Ghulam Ahmad, founder of the Ahmadiyya Muslim Community, the soul will give birth to another rarer entity and will resemble the life on this earth in the sense that this entity will bear a similar relationship to the soul as the soul bears relationship with the human existence on earth. On earth, if a person leads a righteous life and submits to the will of God, his or her tastes become attuned to enjoying spiritual pleasures as opposed to carnal desires. With this, an "embryonic soul" begins to take shape. Different tastes are said to be born which a person given to carnal passions finds no enjoyment. For example, sacrifice of one's own rights over that of others becomes enjoyable, or that forgiveness becomes second nature. In such a state a person finds contentment and peace at heart and at this stage, according to Ahmadiyya beliefs, it can be said that a soul within the soul has begun to take shape. Sufism The Sufi Muslim scholar Ibn 'Arabi defined Barzakh as the intermediate realm or "isthmus". It is between the world of corporeal bodies and the world of spirits, and is a means of contact between the two worlds. Without it, there would be no contact between the two and both would cease to exist. He described it as simple and luminous, like the world of spirits, but also able to take on many different forms just like the world of corporeal bodies can. In broader terms Barzakh, "is anything that separates two things". It has been called the dream world in which the dreamer is in both life and death. Baháʼí Faith The teachings of the Baháʼí Faith state that the nature of the afterlife is beyond the understanding of those living, just as an unborn fetus cannot understand the nature of the world outside of the womb. The Baháʼí writings state that the soul is immortal and after death it will continue to progress until it finally attains God's presence. In Baháʼí belief, souls in the afterlife will continue to retain their individuality and consciousness and will be able to recognize and communicate spiritually with other souls whom they have made deep profound friendships with, such as their spouses. The Baháʼí scriptures also state there are distinctions between souls in the afterlife, and that souls will recognize the worth of their own deeds and understand the consequences of their actions. It is explained that those souls that have turned toward God will experience gladness, while those who have lived in error will become aware of the opportunities they have lost. Also, in the Baháʼí view, souls will be able to recognize the accomplishments of the souls that have reached the same level as themselves, but not those that have achieved a rank higher than them. Indian religions Early Indian religions were characterized by the belief in an afterlife, Ancestor worship, and related rites. These concepts started to significantly change after the period of the Upanishads. Buddhism Afterlife in Buddhism is complex, consisting of an intermediated spirit world, the six realms of existence, and the pure land after achieving enlightenment. Ancestor worship, and links to one's ancestors, was once an important component of early Buddhism, but became less relevant already before the formation of the different Buddhist streams. The concepts and importance of afterlife vary among modern Buddhist teachings. Buddhists maintain that rebirth takes place without an unchanging self or soul passing from one form to another. The type of rebirth will be conditioned by the moral tone of the person's actions (kamma or karma). For example, if a person has committed harmful actions by body, speech and mind based on greed, hate and delusion, would have his/her rebirth in a lower realm, i.e. an animal, a hungry ghost or a hell realm, is to be expected. On the other hand, where a person has performed skillful actions based on generosity, loving-kindness (metta), compassion and wisdom, rebirth in a happy realm, i.e. human or one of the many heavenly realms, can be expected. However, the mechanism of rebirth with Kamma is not deterministic. It depends on various levels of kamma. The most important moment that determines where a person is reborn into is the last thought moment. At that moment, heavy kamma would ripen if there were performed. If not, near death kamma would ripen, and if not death kamma, then habitual kamma would ripen. Finally if none of the above happened, then residual kamma from previous actions can ripen. According to Theravada Buddhism, there are 31 realms of existence that one can be reborn into. According to these, 31 existences comprise 20 existences of supreme deities (Brahmas); 6 existences of deities (Devas); the human existence (Manussa); and, lastly, 4 existences of deprivation or unhappiness (Apaya). Pure Land Buddhism of Mahayana believes in a special place apart from the 31 planes of existence called Pure Land. It is believed that each Buddha has their own pure land, created out of their merits for the sake of sentient beings who recall them mindfully to be able to be reborn in their pure land and train to become a Buddha there. Thus the main practice of pure land Buddhism is to chant a Buddha's name. In Tibetan Buddhism the Tibetan Book of the Dead explains the intermediate state of humans between death and reincarnation. The deceased will find the bright light of wisdom, which shows a straightforward path to move upward and leave the cycle of reincarnation. There are various reasons why the deceased do not follow that light. Some had no briefing about the intermediate state in the former life. Others only used to follow their basic instincts like animals. And some have fear, which results from foul deeds in the former life or from insistent haughtiness. In the intermediate state the awareness is very flexible, so it is important to be virtuous, adopt a positive attitude, and avoid negative ideas. Ideas which are rising from subconsciousness can cause extreme tempers and cowing visions. In this situation they have to understand, that these manifestations are just reflections of the inner thoughts. No one can really hurt them, because they have no more material body. The deceased get help from different Buddhas who show them the path to the bright light. The ones who do not follow the path after all will get hints for a better reincarnation. They have to release the things and beings on which or whom they still hang from the life before. It is recommended to choose a family where the parents trust in the Dharma and to reincarnate with the will to care for the welfare of all beings. Hinduism There are two major views of afterlife in Hinduism: mythical and philosophical. The philosophies of Hinduism consider each individual consists of 3 bodies: physical body compose of water and bio-matter (sthūla śarīra), an energetic/psychic/mental/subtle body (sūkṣma-śarīra) and a causal body (kāraṇa śarīra) comprising subliminal stuff i.e. mental impressions etc. The individual is a stream of consciousness (Ātman) which flows through all the physical changes of the body and at the death of the physical body, flows on into another physical body. The two components that transmigrate are the subtle body and the causal body. The thought that occupies the mind at the time of death determines the quality of our rebirth (antim smaraṇa), hence Hinduism advises to be mindful of one's thoughts and cultivate positive wholesome thoughts – Mantra chanting (Japa) is commonly practiced for this. The mythical includes the philosophical but adds heaven and hell myths. When one leaves the physical body at death he appears in the court of Lord Yama, the God of Death for an exit interview. The panel consists of Yama and Chitragupta – the cosmic accountant, he has a book which consists the history of the dead persons according to his/her mistakes the Lord Yama decides the punishment is and Varuna the cosmic intelligence officer. He is counseled about his life, achievements and failures and is shown a mirror in which his entire life is reflected. (Philosophically these three men are projections of one's mind) Yama the Lord of Justice then sends him to a heavenly realm (svarga) if he has been exceptionally benevolent and beneficent for a period of Rest and Recreation. his period is limited in time by the weight of his good deeds. If he has been exceptionally malevolent and caused immense suffering to other beings then he is sent to a hell realm (naraka) for his sins. After one has exhausted his karmas, he takes birth again to continue his spiritual evolution. However, belief in rebirth was not a part of early Vedic religions and texts. It was later developed by Rishis who challenged the idea of one life as being simplistic. Rebirth can take place as a god (deva), a human (manuṣya) an animal (tiryak) — but it is generally taught that the spiritual evolution takes place from lower to higher species. In certain cases of traumatic death a person can take the form of a Preta or Hungry Ghost – and remains in an earth-bound state interminably – until certain ceremonies are done to liberate them. This mythological part is extensively elaborated in the Hindu Puranas especially in the Garuda Purana. The Upanishads are the first scriptures in Hinduism which explicitly mention about Afterlife, The Bhagavad Gita, a famous Hindu script, says that just as a man discards his old clothes and wears new ones; similarly the Atman discards the old body and takes on a new one. In Hinduism, the belief is that the body is nothing but a shell, the consciousness inside is immutable and indestructible and takes on different lives in a cycle of birth and death. The end of this cycle is called mukti (Sanskrit: मुक्ति) and staying finally with the ultimate reality forever; is moksha (Sanskrit: मोक्ष) or liberation. The (diverse) views of modern Hinduism in part differ significantly from the Historical Vedic religion. Jainism Jainism also believes in the afterlife. They believe that the soul takes on a body form based on previous karmas or actions performed by that soul through eternity. Jains believe the soul is eternal and that the freedom from the cycle of reincarnation is the means to attain eternal bliss. Sikhism The essential doctrine of Sikhism is to experience the divine through simple living, meditation, and contemplation while being alive. Sikhism also has the belief of being in union with God while living. Accounts of afterlife are considered to be aimed at the popular prevailing views of the time so as to provide a referential framework without necessarily establishing a belief in the afterlife. Thus while it is also acknowledged that living the life of a householder is above the metaphysical truth, Sikhism can be considered agnostic to the question of an afterlife. Some scholars also interpret the mention of reincarnation to be naturalistic akin to the biogeochemical cycles. But if one analyses the Sikh Scriptures carefully, one may find that on many occasions the afterlife and the existence of heaven and hell are mentioned and criticised in Guru Granth Sahib and in Dasam Granth as non true man made ideas, so from that it can be concluded that Sikhism does not believe in the existence of heaven and hell; however, heaven and hell are created to temporarily reward and punish, and one will then take birth again until one merges in God. According to the Sikh scriptures, the human form is the closet form to God if the Guru is read and understood, and the best opportunity for a human being to attain salvation and merge back with God and fully understand Him. Sikh Gurus said that nothing dies, nothing is born, everything is ever present, and it just changes forms. Like standing in front of a wardrobe, you pick up a dress and wear it and then you discard it. You wear another one. Thus, in the view of Sikhism, your soul is never born and never dies. Your soul is a part of God and hence lives forever. Others Confucianism Confucius did not directly discuss the afterlife. Nonetheless, Chinese folk religion has had a strong influence on Confucianism, so adherents believe that their ancestors become deified spirits after death. Ancestor veneration in China is widespread. Gnosticism In Gnostic teachings humans contain a divine spark within them said to have been trapped in their bodies by the creator of the material universe known as the Demiurge. It was believed that this spark could be released from the material world and enter into the heavenly spiritual world beyond it if special knowledge or gnosis was attained. The Cathars, for example, viewed reincarnation as a trap made by Satan, who tricked angels from the heavenly realm into entering the physical bodies of humans. They viewed the purpose of life as a way to escape the constant cycle of spiritual incarnations by letting go of worldly attachments. Shinto It is common for families to participate in ceremonies for children at a shrine, yet have a Buddhist funeral at the time of death. In old Japanese legends, it is often claimed that the dead go to a place called yomi (黄泉), a gloomy underground realm with a river separating the living from the dead mentioned in the legend of Izanami and Izanagi. This yomi very closely resembles the Greek Hades; however, later myths include notions of resurrection and even Elysium-like descriptions such as in the legend of Ōkuninushi and Susanoo. Shinto tends to hold negative views on death and corpses as a source of pollution called kegare. However, death is also viewed as a path towards apotheosis in Shintoism as can be evidenced by how legendary individuals become enshrined after death. Perhaps the most famous would be Emperor Ōjin who was enshrined as Hachiman the God of War after his death. Spiritualism According to Edgar Cayce, the afterlife consisted of nine realms equated with the nine planets of astrology. The first, symbolized by Saturn, was a level for the purification of the souls. The second, Mercury's realm, gives us the ability to consider problems as a whole. The third of the nine soul realms is ruled by Earth and is associated with the Earthly pleasures. The fourth realm is where we find out about love and is ruled by Venus. The fifth realm is where we meet our limitations and is ruled by Mars. The sixth realm is ruled by Neptune, and is where we begin to use our creative powers and free ourselves from the material world. The seventh realm is symbolized by Jupiter, which strengthens the soul's ability to depict situations, to analyze people and places, things, and conditions. The eighth afterlife realm is ruled by Uranus and develops psychic ability. The ninth afterlife realm is symbolized by Pluto, the astrological realm of the unconscious. This afterlife realm is a transient place where souls can choose to travel to other realms or other solar systems, it is the soul’s liberation into eternity, and is the realm that opens the doorway from our solar system into the cosmos point of view. Mainstream Spiritualists postulate a series of seven realms that are not unlike Edgar Cayce's nine realms ruled by the planets. As it evolves, the soul moves higher and higher until it reaches the ultimate realm of spiritual oneness. The first realm, equated with hell, is the place where troubled souls spend a long time before they are compelled to move up to the next level. The second realm, where most souls move directly, is thought of as an intermediate transition between the lower planes of life and hell and the higher perfect realms of the universe. The third level is for those who have worked with their karmic inheritance. The fourth level is that from which evolved souls teach and direct those on Earth. The fifth level is where the soul leaves human consciousness behind. At the sixth plane, the soul is finally aligned with the cosmic consciousness and has no sense of separateness or individuality. Finally, the seventh level, the goal of each soul, is where the soul transcends its own sense of "soulfulness" and reunites with the World Soul and the universe. Taoism Taoism views life as an illusion and death as a transformation into immortality. Taoists believe that immortality of the soul can be achieved by living a virtuous life in harmony with the Tao. They are taught not to fear death, as it is simply part of nature. Traditional African religions Traditional African religions are diverse in their beliefs in an afterlife. Hunter-gatherer societies such as the Hadza have no particular belief in an afterlife, and the death of an individual is a straightforward end to their existence. Ancestor cults are found throughout Sub-Saharan Africa, including cultures like the Yombe, Beng, Yoruba and Ewe, "[T]he belief that the dead come back into life and are reborn into their families is given concrete expression in the personal names that are given to children....What is reincarnated are some of the dominant characteristics of the ancestor and not his soul. For each soul remains distinct and each birth represents a new soul." The Yoruba, Dogon and LoDagoa have eschatological ideas similar to Abrahamic religions, "but in most African societies, there is a marked absence of such clear-cut notions of heaven and hell, although there are notions of God judging the soul after death." In some societies like the Mende, multiple beliefs coexist. The Mende believe that people die twice: once during the process of joining the secret society, and again during biological death after which they become ancestors. However, some Mende also believe that after people are created by God they live ten consecutive lives, each in progressively descending worlds. One cross-cultural theme is that the ancestors are part of the world of the living, interacting with it regularly. Unitarian Universalism Some Unitarian Universalists believe in universalism: that all souls will ultimately be saved and that there are no torments of hell. Unitarian Universalists differ widely in their theology hence there is no exact same stance on the issue. Although Unitarians historically believed in a literal hell, and Universalists historically believed that everyone goes to heaven, modern Unitarian Universalists can be categorized into those believing in a heaven, reincarnation and oblivion. Most Unitarian Universalists believe that heaven and hell are symbolic places of consciousness and the faith is largely focused on the worldly life rather than any possible afterlife. Wicca The Wiccan afterlife is most commonly described as The Summerland. Here, souls rest, recuperate from life, and reflect on the experiences they had during their lives. After a period of rest, the souls are reincarnated, and the memory of their previous lives is erased. Many Wiccans see The Summerland as a place to reflect on their life actions. It is not a place of reward, but rather the end of a life journey at an end point of incarnations. Zoroastrianism Zoroastrianism states that the urvan, the disembodied spirit, lingers on earth for three days before departing downward to the kingdom of the dead that is ruled by Yima. For the three days that it rests on Earth, righteous souls sit at the head of their body, chanting the Ustavaiti Gathas with joy, while a wicked person sits at the feet of the corpse, wails and recites the Yasna. Zoroastrianism states that for the righteous souls, a beautiful maiden, which is the personification of the soul's good thoughts, words and deeds, appears. For a wicked person, a very old, ugly, naked hag appears. After three nights, the soul of the wicked is taken by the demon Vizaresa (Vīzarəša), to Chinvat bridge, and is made to go to darkness (hell). Yima is believed to have been the first king on earth to rule, as well as the first man to die. Inside of Yima's realm, the spirits live a shadowy existence, and are dependent on their own descendants which are still living on Earth. Their descendants are to satisfy their hunger and clothe them, through rituals done on earth. Rituals which are done on the first three days are vital and important, as they protect the soul from evil powers and give it strength to reach the underworld. After three days, the soul crosses Chinvat bridge which is the Final Judgment of the soul. Rashnu and Sraosha are present at the final judgment. The list is expanded sometimes, and include Vahman and Ormazd. Rashnu is the yazata who holds the scales of justice. If the good deeds of the person outweigh the bad, the soul is worthy of paradise. If the bad deeds outweigh the good, the bridge narrows down to the width of a blade-edge, and a horrid hag pulls the soul in her arms, and takes it down to hell with her. Misvan Gatu is the "place of the mixed ones" where the souls lead a gray existence, lacking both joy and sorrow. A soul goes here if his/her good deeds and bad deeds are equal, and Rashnu's scale is equal. Parapsychology The Society for Psychical Research was founded in 1882 with the express intention of investigating phenomena relating to Spiritualism and the afterlife. Its members continue to conduct scientific research on the paranormal to this day. Some of the earliest attempts to apply scientific methods to the study of phenomena relating to an afterlife were conducted by this organization. Its earliest members included noted scientists like William Crookes, and philosophers such as Henry Sidgwick and William James. Parapsychological investigation of the afterlife includes the study of haunting, apparitions of the deceased, instrumental trans-communication, electronic voice phenomena, and mediumship. A study conducted in 1901 by physician Duncan MacDougall sought to measure the weight lost by a human when the soul "departed the body" upon death. MacDougall weighed dying patients in an attempt to prove that the soul was material, tangible and thus measurable. Although MacDougall's results varied considerably from "21 grams", for some people this figure has become synonymous with the measure of a soul's mass. The title of the 2003 movie 21 Grams is a reference to MacDougall's findings. His results have never been reproduced, and are generally regarded either as meaningless or considered to have had little if any scientific merit. Frank Tipler has argued that physics can explain immortality, although such arguments are not falsifiable and, in Karl Popper's views, they do not qualify as science. After 25 years of parapsychological research Susan Blackmore came to the conclusion that, according to her experiences, there is not enough empirical evidence for many of these cases. Mediumship Mediums purportedly act as a vessel for communications from spirits in other realms. Mediumship is not specific to one culture or religion; it can be identified in several belief systems, most notably Spiritualism. While the practice gained popularity in Europe and North America in the 19th century, evidence of mediumship dates back thousands of years in Asia. Mediums who claim to have contact with deceased people include Tyler Henry and Pascal Voggenhuber. Near death research Research also includes the study of the near death experience. Scientists who have worked in this area include Elisabeth Kübler-Ross, Raymond Moody, Sam Parnia, Michael Sabom, Bruce Greyson, Peter Fenwick, Jeffrey Long, Susan Blackmore, Charles Tart, William James, Ian Stevenson, Michael Persinger, Pim van Lommel, Penny Sartori, Walter van Laack among others. Past life regression Past life regression is a method that uses hypnosis to recover what practitioners believe are memories of past lives or incarnations. The technique used during past-life regression involves the subject answering a series of questions while hypnotized to reveal identity and events of alleged past lives, a method similar to that used in recovered memory therapy and one that, similarly, often misrepresents memory as a faithful recording of previous events rather than a constructed set of recollections. However, medical experts and practitioners do not agree that the past life memories gained from past life regressions are truly from past lives; experts generally regard claims of recovered memories of past lives as fantasies or delusions or a type of confabulation, because the use of hypnosis and suggestive questions can tend to leave the subject particularly likely to hold distorted or false memories. Philosophy Modern philosophy There is a view based on the philosophical question of personal identity, termed open individualism by Daniel Kolak, that concludes that individual conscious experience is illusory, and because consciousness continues after death in all conscious beings, you do not die. This position has allegedly been supported by physicists such as Erwin Schrödinger and Freeman Dyson. Certain problems arise with the idea of a particular person continuing after death. Peter van Inwagen, in his argument regarding resurrection, notes that the materialist must have some sort of physical continuity. John Hick also raises questions regarding personal identity in his book, Death and Eternal Life, using an example of a person ceasing to exist in one place while an exact replica appears in another. If the replica had all the same experiences, traits, and physical appearances of the first person, we would all attribute the same identity to the second, according to Hick. Process philosophy In the panentheistic model of process philosophy and theology the writers Alfred North Whitehead and Charles Hartshorne rejected the idea that the universe was made of substance, instead saying reality is composed of living experiences (occasions of experience). According to Hartshorne people do not experience subjective (or personal) immortality in the afterlife, but they do have objective immortality because their experiences live on forever in God, who contains all that was. However other process philosophers such as David Ray Griffin have written that people may have subjective experience after death. Science Psychological proposals for the origin of a belief in an afterlife include cognitive disposition, cultural learning, and as an intuitive religious idea. In 2008, a large-scale study conducted by the University of Southampton involving 2060 patients from 15 hospitals in the United Kingdom, United States and Austria was launched. The AWARE (AWAreness during REsuscitation) study examined the broad range of mental experiences in relation to death. In a large study, researchers also tested the validity of conscious experiences for the first time using objective markers, to determine whether claims of awareness compatible with out-of-body experiences correspond with real or hallucinatory events. The results revealed that 40% of those who survived a cardiac arrest were aware during the time that they were clinically dead and before their hearts were restarted. One patient also had a verified out-of-body experience (over 80% of patients did not survive their cardiac arrest or were too sick to be interviewed), but his cardiac arrest occurred in a room without markers. Dr. Parnia in the interview stated, "The evidence thus far suggests that in the first few minutes after death, consciousness is not annihilated." The AWARE study drew the following primary conclusions: In some cases of cardiac arrest, memories of visual awareness compatible with so called out-of-body experiences may correspond with actual events. A number of NDErs may have vivid death experiences, but do not recall them due to the effects of brain injury or sedative drugs on memory circuits. The recalled experience surrounding death merits a genuine investigation without prejudice. Studies have also been done on the widely reported phenomenon of near death experiences (NDE). Experiencers commonly report being transported to a different "realm" or "plane of existence" and they have been shown to display a lasting positive aftereffect on most experiencers. See also Allegory of the long spoons Astral Plane Bardo Brig of Dread (Bridge of Dread) Empiricism Epistemology Eternal oblivion Exaltation (Mormonism) Fate of the unlearned Heaven Rebecca Hensler Hell Immortality Mictlan Mind uploading Nirvana Omega Point Paradise Phowa Pre-existence Purgatory Rebirth Reincarnation Soul Soul flight Soul retrieval Spiritism Suspended animation Spirit World Undead Underworld References Explanatory notes Citations Bibliography Philip C Almond, Afterlife: A History of Life after Death, London and Ithaca NY: I.B. Tauris and Cornell University Press, 2015. Campbell, Douglas R. "Plato's Theory of Reincarnation: Eschatology and Natural Philosophy," Review of Metaphysics 75 (4): 643–665. 2022. Dan Cohn-Sherbok and Christopher Lewis, (eds.), Beyond Death: Theological and Philosophical Reflections on Life after Death, Pelgrave-MacMillan, 1995. David Fontana, Is there an afterlife: a comprehensive overview of the evidence, O Books 2005. Jane Idelman Smith and Yazbeck Haddad, The Islamic Understanding of Death and Resurrection. Oxford UP, 2002. Michael Martin and Keith Augustine (eds.), The Myth of an Afterlife: The Case against Life After Death, Rowman & Littlefield, 2015. . John J. McGraw, Brain & Belief: An Exploration of the Human Soul, Aegis Press, 2004. Mark Mirabello, A Traveler's Guide to the Afterlife: Traditions and Beliefs on Death, Dying, and What Lies Beyond, Inner Traditions. 2016. Christopher M. Moreman, Beyond the Threshold: Afterlife Beliefs and Experiences in World Religions, Rowman & Littlefield, 2008. Robert A. Morey, Death and the Afterlife, Minneapolis, Minn.: Bethany House Publishers, 1984. 315 p. Hiroshi Obayashi (ed.), Death and Afterlife: Perspectives of World Religions, Praeger, 1991. Alan F. Segal, Life After Death: A History of the Afterlife in Western Religion, Doubleday, 2004. Gregory Shushan, Conceptions of the Afterlife in Early Civilizations: Universalism, Constructivism and Near-Death Experience, New York & London, Continuum, 2009. . Further reading (Extensive 1878 text by William Rounseville Alger) External links Vatican.va: Catechism of the Catholic Church Islamic Guide: Life After Death Judaism 101: Olam Ha-Ba: The Afterlife Stewart Salmond, Christian Doctrine of Immortality Dictionary of the History of Ideas: "Death and Immortality" Online searchable edition of Swedenborg's Heaven and Hell (Swedenborg Foundation 2000) Collection: Heaven, Hell, and Afterlives from the University of Michigan Museum of Art Philosophy of religion Religious belief and doctrine	7
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way. History The history of astrometry is linked to the history of star catalogues, which gave astronomers reference points for objects in the sky so they could track their movements. This can be dated back to Hipparchus, who around 190 BC used the catalogue of his predecessors Timocharis and Aristillus to discover Earth's precession. In doing so, he also developed the brightness scale still in use today. Hipparchus compiled a catalogue with at least 850 stars and their positions. Hipparchus's successor, Ptolemy, included a catalogue of 1,022 stars in his work the Almagest, giving their location, coordinates, and brightness. In the 10th century, Abd al-Rahman al-Sufi carried out observations on the stars and described their positions, magnitudes and star color; furthermore, he provided drawings for each constellation, which are depicted in his Book of Fixed Stars. Ibn Yunus observed more than 10,000 entries for the Sun's position for many years using a large astrolabe with a diameter of nearly 1.4 metres. His observations on eclipses were still used centuries later in Simon Newcomb's investigations on the motion of the Moon, while his other observations of the motions of the planets Jupiter and Saturn inspired Laplace's Obliquity of the Ecliptic and Inequalities of Jupiter and Saturn. In the 15th century, the Timurid astronomer Ulugh Beg compiled the Zij-i-Sultani, in which he catalogued 1,019 stars. Like the earlier catalogs of Hipparchus and Ptolemy, Ulugh Beg's catalogue is estimated to have been precise to within approximately 20 minutes of arc. In the 16th century, Tycho Brahe used improved instruments, including large mural instruments, to measure star positions more accurately than previously, with a precision of 15–35 arcsec. Taqi al-Din measured the right ascension of the stars at the Constantinople Observatory of Taqi ad-Din using the "observational clock" he invented. When telescopes became commonplace, setting circles sped measurements James Bradley first tried to measure stellar parallaxes in 1729. The stellar movement proved too insignificant for his telescope, but he instead discovered the aberration of light and the nutation of the Earth's axis. His cataloguing of 3222 stars was refined in 1807 by Friedrich Bessel, the father of modern astrometry. He made the first measurement of stellar parallax: 0.3 arcsec for the binary star 61 Cygni. In 1872, William Huggins used spectroscopy to measure the radial velocity of several prominent stars, including Sirius. Being very difficult to measure, only about 60 stellar parallaxes had been obtained by the end of the 19th century, mostly by use of the filar micrometer. Astrographs using astronomical photographic plates sped the process in the early 20th century. Automated plate-measuring machines and more sophisticated computer technology of the 1960s allowed more efficient compilation of star catalogues. Started in the late 19th century, the project Carte du Ciel to improve star mapping couldn't be finished but made photography a common technique for astrometry. In the 1980s, charge-coupled devices (CCDs) replaced photographic plates and reduced optical uncertainties to one milliarcsecond. This technology made astrometry less expensive, opening the field to an amateur audience. In 1989, the European Space Agency's Hipparcos satellite took astrometry into orbit, where it could be less affected by mechanical forces of the Earth and optical distortions from its atmosphere. Operated from 1989 to 1993, Hipparcos measured large and small angles on the sky with much greater precision than any previous optical telescopes. During its 4-year run, the positions, parallaxes, and proper motions of 118,218 stars were determined with an unprecedented degree of accuracy. A new "Tycho catalog" drew together a database of 1,058,332 stars to within 20-30 mas (milliarcseconds). Additional catalogues were compiled for the 23,882 double and multiple stars and 11,597 variable stars also analyzed during the Hipparcos mission. In 2013, the Gaia satellite was launched and improved the accuracy of Hipparcos. The precision was improved by a factor of 100 and enabled the mapping of a billion stars. Today, the catalogue most often used is USNO-B1.0, an all-sky catalogue that tracks proper motions, positions, magnitudes and other characteristics for over one billion stellar objects. During the past 50 years, 7,435 Schmidt camera plates were used to complete several sky surveys that make the data in USNO-B1.0 accurate to within 0.2 arcsec. Applications Apart from the fundamental function of providing astronomers with a reference frame to report their observations in, astrometry is also fundamental for fields like celestial mechanics, stellar dynamics and galactic astronomy. In observational astronomy, astrometric techniques help identify stellar objects by their unique motions. It is instrumental for keeping time, in that UTC is essentially the atomic time synchronized to Earth's rotation by means of exact astronomical observations. Astrometry is an important step in the cosmic distance ladder because it establishes parallax distance estimates for stars in the Milky Way. Astrometry has also been used to support claims of extrasolar planet detection by measuring the displacement the proposed planets cause in their parent star's apparent position on the sky, due to their mutual orbit around the center of mass of the system. Astrometry is more accurate in space missions that are not affected by the distorting effects of the Earth's atmosphere. NASA's planned Space Interferometry Mission (SIM PlanetQuest) (now cancelled) was to utilize astrometric techniques to detect terrestrial planets orbiting 200 or so of the nearest solar-type stars. The European Space Agency's Gaia Mission, launched in 2013, applies astrometric techniques in its stellar census. In addition to the detection of exoplanets, it can also be used to determine their mass. Astrometric measurements are used by astrophysicists to constrain certain models in celestial mechanics. By measuring the velocities of pulsars, it is possible to put a limit on the asymmetry of supernova explosions. Also, astrometric results are used to determine the distribution of dark matter in the galaxy. Astronomers use astrometric techniques for the tracking of near-Earth objects. Astrometry is responsible for the detection of many record-breaking Solar System objects. To find such objects astrometrically, astronomers use telescopes to survey the sky and large-area cameras to take pictures at various determined intervals. By studying these images, they can detect Solar System objects by their movements relative to the background stars, which remain fixed. Once a movement per unit time is observed, astronomers compensate for the parallax caused by Earth's motion during this time and the heliocentric distance to this object is calculated. Using this distance and other photographs, more information about the object, including its orbital elements, can be obtained. 50000 Quaoar and 90377 Sedna are two Solar System objects discovered in this way by Michael E. Brown and others at Caltech using the Palomar Observatory's Samuel Oschin telescope of and the Palomar-Quest large-area CCD camera. The ability of astronomers to track the positions and movements of such celestial bodies is crucial to the understanding of the Solar System and its interrelated past, present, and future with others in the Universe. Statistics A fundamental aspect of astrometry is error correction. Various factors introduce errors into the measurement of stellar positions, including atmospheric conditions, imperfections in the instruments and errors by the observer or the measuring instruments. Many of these errors can be reduced by various techniques, such as through instrument improvements and compensations to the data. The results are then analyzed using statistical methods to compute data estimates and error ranges. Computer programs XParallax viu (Free application for Windows) Astrometrica (Application for Windows) Astrometry.net (Online blind astrometry) See also References Further reading External links MPC Guide to Minor Body Astrometry Astrometry Department of the U.S. Naval Observatory USNO Astrometric Catalog and related Products Planet-Like Body Discovered at Fringes of Our Solar System (2004-03-15) Mike Brown's Caltech Home Page Scientific Paper describing Sedna's discovery The Hipparcos Space Astrometry Mission — on ESA Astronomical sub-disciplines Astrological aspects Measurement	6
Athena or Athene, often given the epithet Pallas, is an ancient Greek goddess associated with wisdom, warfare, and handicraft who was later syncretized with the Roman goddess Minerva. Athena was regarded as the patron and protectress of various cities across Greece, particularly the city of Athens, from which she most likely received her name. The Parthenon on the Acropolis of Athens is dedicated to her. Her major symbols include owls, olive trees, snakes, and the Gorgoneion. In art, she is generally depicted wearing a helmet and holding a spear. From her origin as an Aegean palace goddess, Athena was closely associated with the city. She was known as Polias and Poliouchos (both derived from polis, meaning "city-state"), and her temples were usually located atop the fortified acropolis in the central part of the city. The Parthenon on the Athenian Acropolis is dedicated to her, along with numerous other temples and monuments. As the patron of craft and weaving, Athena was known as Ergane. She was also a warrior goddess, and was believed to lead soldiers into battle as Athena Promachos. Her main festival in Athens was the Panathenaia, which was celebrated during the month of Hekatombaion in midsummer and was the most important festival on the Athenian calendar. In Greek mythology, Athena was believed to have been born from the forehead of her father Zeus. In some versions of the story, Athena has no mother and is born from Zeus' forehead by parthenogenesis. In others, such as Hesiod's Theogony, Zeus swallows his consort Metis, who was pregnant with Athena; in this version, Athena is first born within Zeus and then escapes from his body through his forehead. In the founding myth of Athens, Athena bested Poseidon in a competition over patronage of the city by creating the first olive tree. She was known as Athena Parthenos "Athena the Virgin", but in one archaic Attic myth, the god Hephaestus tried and failed to rape her, resulting in Gaia giving birth to Erichthonius, an important Athenian founding hero. Athena was the patron goddess of heroic endeavor; she was believed to have aided the heroes Perseus, Heracles, Bellerophon, and Jason. Along with Aphrodite and Hera, Athena was one of the three goddesses whose feud resulted in the beginning of the Trojan War. She plays an active role in the Iliad, in which she assists the Achaeans and, in the Odyssey, she is the divine counselor to Odysseus. In the later writings of the Roman poet Ovid, Athena was said to have competed against the mortal Arachne in a weaving competition, afterward transforming Arachne into the first spider; Ovid also describes how she transformed Medusa into a Gorgon after witnessing her being raped by Poseidon in her temple. Since the Renaissance, Athena has become an international symbol of wisdom, the arts, and classical learning. Western artists and allegorists have often used Athena as a symbol of freedom and democracy. Etymology Athena is associated with the city of Athens. The name of the city in ancient Greek is (), a plural toponym, designating the place where—according to myth—she presided over the Athenai, a sisterhood devoted to her worship. In ancient times, scholars argued whether Athena was named after Athens or Athens after Athena. Now scholars generally agree that the goddess takes her name from the city; the ending -ene is common in names of locations, but rare for personal names. Testimonies from different cities in ancient Greece attest that similar city goddesses were worshipped in other cities and, like Athena, took their names from the cities where they were worshipped. For example, in Mycenae there was a goddess called Mykene, whose sisterhood was known as Mykenai, whereas at Thebes an analogous deity was called Thebe, and the city was known under the plural form Thebai (or Thebes, in English, where the 's' is the plural formation). The name Athenai is likely of Pre-Greek origin because it contains the presumably Pre-Greek morpheme *-ān-. In his dialogue Cratylus, the ancient Greek philosopher Plato (428–347 BC) gives some rather imaginative etymologies of Athena's name, based on the theories of the ancient Athenians and his etymological speculations: Thus, Plato believed that Athena's name was derived from Greek , —which the later Greeks rationalised as from the deity's (, ) mind (, ). The second-century AD orator Aelius Aristides attempted to derive natural symbols from the etymological roots of Athena's names to be aether, air, earth, and moon. Origins Athena was originally the Aegean goddess of the palace, who presided over household crafts and protected the king. A single Mycenaean Greek inscription appears at Knossos in the Linear B tablets from the Late Minoan II-era "Room of the Chariot Tablets"; these comprise the earliest Linear B archive anywhere. Although Athana potnia is often translated as "Mistress Athena", it could also mean "the Potnia of Athana", or the Lady of Athens. However, any connection to the city of Athens in the Knossos inscription is uncertain. A sign series appears in the still undeciphered corpus of Linear A tablets, written in the unclassified Minoan language. This could be connected with the Linear B Mycenaean expressions and or (Diwia, "of Zeus" or, possibly, related to a homonymous goddess), resulting in a translation "Athena of Zeus" or "divine Athena". Similarly, in the Greek mythology and epic tradition, Athena figures as a daughter of Zeus (; cfr. Dyeus). However, the inscription quoted seems to be very similar to "", quoted as SY Za 1 by Jan Best. Best translates the initial , which is recurrent in line beginnings, as "I have given". A Mycenean fresco depicts two women extending their hands towards a central figure, who is covered by an enormous figure-eight shield; this may depict the warrior-goddess with her palladium, or her palladium in an aniconic representation. In the "Procession Fresco" at Knossos, which was reconstructed by the Mycenaeans, two rows of figures carrying vessels seem to meet in front of a central figure, which is probably the Minoan precursor to Athena. The early twentieth-century scholar Martin Persson Nilsson argued that the Minoan snake goddess figurines are early representations of Athena. Nilsson and others have claimed that, in early times, Athena was either an owl herself or a bird goddess in general. In the third book of the Odyssey, she takes the form of a sea-eagle. Proponents of this view argue that she dropped her prophylactic owl mask before she lost her wings. "Athena, by the time she appears in art," Jane Ellen Harrison remarks, "has completely shed her animal form, has reduced the shapes she once wore of snake and bird to attributes, but occasionally in black-figure vase-paintings she still appears with wings." It is generally agreed that the cult of Athena preserves some aspects of the Proto-Indo-European transfunctional goddess. The cult of Athena may have also been influenced by those of Near Eastern warrior goddesses such as the East Semitic Ishtar and the Ugaritic Anat, both of whom were often portrayed bearing arms. Classical scholar Charles Penglase notes that Athena resembles Inanna in her role as a "terrifying warrior goddess" and that both goddesses were closely linked with creation. Athena's birth from the head of Zeus may be derived from the earlier Sumerian myth of Inanna's descent into and return from the Underworld. Plato notes that the citizens of Sais in Egypt worshipped a goddess known as Neith, whom he identifies with Athena. Neith was the ancient Egyptian goddess of war and hunting, who was also associated with weaving; her worship began during the Egyptian Pre-Dynastic period. In Greek mythology, Athena was reported to have visited mythological sites in North Africa, including Libya's Triton River and the Phlegraean plain. Based on these similarities, the Sinologist Martin Bernal created the "Black Athena" hypothesis, which claimed that Neith was brought to Greece from Egypt, along with "an enormous number of features of civilization and culture in the third and second millennia". The "Black Athena" hypothesis stirred up widespread controversy near the end of the twentieth century, but it has now been widely rejected by modern scholars. Epithets and attributes Athena was known as Atrytone ( "the Unwearying"), Parthenos ( "Virgin"), and Promachos ( "she who fights in front"). The epithet Polias (Πολιάς "of the city"), refers to Athena's role as protectress of the city. The epithet Ergane (Εργάνη "the Industrious") pointed her out as the patron of craftsmen and artisans. Burkert notes that the Athenians sometimes simply called Athena "the Goddess", hē theós (ἡ θεός), certainly an ancient title. After serving as the judge at the trial of Orestes in which he was acquitted of having murdered his mother Clytemnestra, Athena won the epithet Areia (Αρεία). Some have described Athena, along with the goddesses Hestia and Artemis as being asexual, this is mainly supported by the fact that in the Homeric Hymns, 5, To Aphrodite, where Aphrodite is described as having "no power" over the three goddesses. Athena was sometimes given the epithet Hippia (Ἵππια "of the horses", "equestrian"), referring to her invention of the bit, bridle, chariot, and wagon. The Greek geographer Pausanias mentions in his Guide to Greece that the temple of Athena Chalinitis ("the bridler") in Corinth was located near the tomb of Medea's children. Other epithets include Ageleia, Itonia and Aethyia, under which she was worshiped in Megara. The word aíthyia () signifies a "diver", also some diving bird species (possibly the shearwater) and figuratively, a "ship", so the name must reference Athena teaching the art of shipbuilding or navigation. In a temple at Phrixa in Elis, reportedly built by Clymenus, she was known as Cydonia (Κυδωνία). Pausanias wrote that at Buporthmus there was a sanctuary of Athena Promachorma (Προμαχόρμα), meaning protector of the anchorage. The Greek biographer Plutarch (AD 46–120) refers to an instance during the construction of the Propylaia of her being called Athena Hygieia (Ὑγίεια, i. e. personified "Health") after inspiring a physician to a successful course of treatment. At Athens there is the temple of Athena Phratria, as patron of a phratry, in the Ancient Agora of Athens. Pallas Athena Athena's epithet Pallas – her most renowned one – is derived either from , meaning "to brandish [as a weapon]", or, more likely, from and related words, meaning "youth, young woman". On this topic, Walter Burkert says "she is the Pallas of Athens, Pallas Athenaie, just as Hera of Argos is Here Argeie." In later times, after the original meaning of the name had been forgotten, the Greeks invented myths to explain its origins, such as those reported by the Epicurean philosopher Philodemus and the Bibliotheca of Pseudo-Apollodorus, which claim that Pallas was originally a separate entity, whom Athena had slain in combat. In one version of the myth, Pallas was the daughter of the sea-god Triton; she and Athena were childhood friends, but Athena accidentally killed her during a friendly sparring match. Distraught over what she had done, Athena took the name Pallas for herself as a sign of her grief. In another version of the story, Pallas was a Giant; Athena slew him during the Gigantomachy and flayed off his skin to make her cloak, which she wore as a victory trophy. In an alternative variation of the same myth, Pallas was instead Athena's father, who attempted to assault his own daughter, causing Athena to kill him and take his skin as a trophy. The palladium was a statue of Athena that was said to have stood in her temple on the Trojan Acropolis. Athena was said to have carved the statue herself in the likeness of her dead friend Pallas. The statue had special talisman-like properties and it was thought that, as long as it was in the city, Troy could never fall. When the Greeks captured Troy, Cassandra, the daughter of Priam, clung to the palladium for protection, but Ajax the Lesser violently tore her away from it and dragged her over to the other captives. Athena was infuriated by this violation of her protection. Although Agamemnon attempted to placate her anger with sacrifices, Athena sent a storm at Cape Kaphereos to destroy almost the entire Greek fleet and scatter all of the surviving ships across the Aegean. Glaukopis In Homer's epic works, Athena's most common epithet is (), which usually is translated as, "bright-eyed" or "with gleaming eyes". The word is a combination of (, meaning "gleaming, silvery", and later, "bluish-green" or "gray") and (, "eye, face"). The word (, "little owl") is from the same root, presumably according to some, because of the bird's own distinctive eyes. Athena was associated with the owl from very early on; in archaic images, she is frequently depicted with an owl perched on her hand. Through its association with Athena, the owl evolved into the national mascot of the Athenians and eventually became a symbol of wisdom. Tritogeneia In the Iliad (4.514), the Odyssey (3.378), the Homeric Hymns, and in Hesiod's Theogony, Athena is also given the curious epithet Tritogeneia (Τριτογένεια), whose significance remains unclear. It could mean various things, including "Triton-born", perhaps indicating that the homonymous sea-deity was her parent according to some early myths. One myth relates the foster father relationship of this Triton towards the half-orphan Athena, whom he raised alongside his own daughter Pallas. Kerényi suggests that "Tritogeneia did not mean that she came into the world on any particular river or lake, but that she was born of the water itself; for the name Triton seems to be associated with water generally." In Ovid's Metamorphoses, Athena is occasionally referred to as "Tritonia". Another possible meaning may be "triple-born" or "third-born", which may refer to a triad or to her status as the third daughter of Zeus or the fact she was born from Metis, Zeus, and herself; various legends list her as being the first child after Artemis and Apollo, though other legends identify her as Zeus' first child. Several scholars have suggested a connection to the Rigvedic god Trita, who was sometimes grouped in a body of three mythological poets. Michael Janda has connected the myth of Trita to the scene in the Iliad in which the "three brothers" Zeus, Poseidon, and Hades divide the world between them, receiving the "broad sky", the sea, and the underworld respectively. Janda further connects the myth of Athena being born of the head (i. e. the uppermost part) of Zeus, understanding Trito- (which perhaps originally meant "the third") as another word for "the sky". In Janda's analysis of Indo-European mythology, this heavenly sphere is also associated with the mythological body of water surrounding the inhabited world (cfr. Triton's mother, Amphitrite). Yet another possible meaning is mentioned in Diogenes Laertius' biography of Democritus, that Athena was called "Tritogeneia" because three things, on which all mortal life depends, come from her. Cult and patronages Panhellenic and Athenian cult In her aspect of Athena Polias, Athena was venerated as the goddess of the city and the protectress of the citadel. In Athens, the Plynteria, or "Feast of the Bath", was observed every year at the end of the month of Thargelion. The festival lasted for five days. During this period, the priestesses of Athena, or plyntrídes, performed a cleansing ritual within the Erechtheion, a sanctuary devoted to Athena and Poseidon. Here Athena's statue was undressed, her clothes washed, and body purified. Athena was worshipped at festivals such as Chalceia as Athena Ergane, the patroness of various crafts, especially weaving. She was also the patron of metalworkers and was believed to aid in the forging of armor and weapons. During the late fifth century BC, the role of goddess of philosophy became a major aspect of Athena's cult. As Athena Promachos, she was believed to lead soldiers into battle. Athena represented the disciplined, strategic side of war, in contrast to her brother Ares, the patron of violence, bloodlust, and slaughter—"the raw force of war". Athena was believed to only support those fighting for a just cause and was thought to view war primarily as a means to resolve conflict. The Greeks regarded Athena with much higher esteem than Ares. Athena was especially worshipped in this role during the festivals of the Panathenaea and Pamboeotia, both of which prominently featured displays of athletic and military prowess. As the patroness of heroes and warriors, Athena was believed to favor those who used cunning and intelligence rather than brute strength. In her aspect as a warrior maiden, Athena was known as Parthenos ( "virgin"), because, like her fellow goddesses Artemis and Hestia, she was believed to remain perpetually a virgin. Athena's most famous temple, the Parthenon on the Athenian Acropolis, takes its name from this title. According to Karl Kerényi, a scholar of Greek mythology, the name Parthenos is not merely an observation of Athena's virginity, but also a recognition of her role as enforcer of rules of sexual modesty and ritual mystery. Even beyond recognition, the Athenians allotted the goddess value based on this pureness of virginity, which they upheld as a rudiment of female behavior. Kerényi's study and theory of Athena explains her virginal epithet as a result of her relationship to her father Zeus and a vital, cohesive piece of her character throughout the ages. This role is expressed in several stories about Athena. Marinus of Neapolis reports that when Christians removed the statue of the goddess from the Parthenon, a beautiful woman appeared in a dream to Proclus, a devotee of Athena, and announced that the "Athenian Lady" wished to dwell with him. Athena was also credited with creating the pebble-based form of divination. Those pebbles were called thriai, which was also the collective name of a group of nymphs with prophetic powers. Her half-brother Apollo however, angered and spiteful at the practitioners of an art rival to his own, complained to their father Zeus about it, with the pretext that many people took to casting pebbles, but few actually were true prophets. Zeus, sympathizing with Apollo's grievances, discredited the pebble divination by rendering the pebbles useless. Apollo's words became the basis of an ancient Greek idiom. Regional cults Athena was not only the patron goddess of Athens, but also other cities, including Argos, Sparta, Gortyn, Lindos, and Larisa. The various cults of Athena were all branches of her panhellenic cult and often proctored various initiation rites of Grecian youth, such as the passage into citizenship by young men or the passage of young women into marriage. These cults were portals of a uniform socialization, even beyond mainland Greece. Athena was frequently equated with Aphaea, a local goddess of the island of Aegina, originally from Crete and also associated with Artemis and the nymph Britomartis. In Arcadia, she was assimilated with the ancient goddess Alea and worshiped as Athena Alea. Sanctuaries dedicated to Athena Alea were located in the Laconian towns of Mantineia and Tegea. The temple of Athena Alea in Tegea was an important religious center of ancient Greece. The geographer Pausanias was informed that the temenos had been founded by Aleus. Athena had a major temple on the Spartan Acropolis, where she was venerated as Poliouchos and Khalkíoikos ("of the Brazen House", often latinized as Chalcioecus). This epithet may refer to the fact that cult statue held there may have been made of bronze, that the walls of the temple itself may have been made of bronze, or that Athena was the patron of metal-workers. Bells made of terracotta and bronze were used in Sparta as part of Athena's cult. An Ionic-style temple to Athena Polias was built at Priene in the fourth century BC. It was designed by Pytheos of Priene, the same architect who designed the Mausoleum at Halicarnassus. The temple was dedicated by Alexander the Great and an inscription from the temple declaring his dedication is now held in the British Museum. Mythology Birth She was the daughter of Zeus, produced without a mother, and emerged full-grown from his forehead. There was an alternate story that Zeus swallowed Metis, the goddess of counsel, while she was pregnant with Athena and when she was fully grown she emerged from Zeus' forehead. Being the favorite child of Zeus, she had great power. In the classical Olympian pantheon, Athena was regarded as the favorite child of Zeus, born fully armed from his forehead. The story of her birth comes in several versions. The earliest mention is in Book V of the Iliad, when Ares accuses Zeus of being biased in favor of Athena because "autos egeinao" (literally "you fathered her", but probably intended as "you gave birth to her"). She was essentially urban and civilized, the antithesis in many respects of Artemis, goddess of the outdoors. Athena was probably a pre-Hellenic goddess and was later taken over by the Greeks. In the version recounted by Hesiod in his Theogony, Zeus married the goddess Metis, who is described as the "wisest among gods and mortal men", and engaged in sexual intercourse with her. After learning that Metis was pregnant, however, he became afraid that the unborn offspring would try to overthrow him, because Gaia and Ouranos had prophesied that Metis would bear children wiser than their father. In order to prevent this, Zeus tricked Metis into letting him swallow her, but it was too late because Metis had already conceived. A later account of the story from the Bibliotheca of Pseudo-Apollodorus, written in the second century AD, makes Metis Zeus's unwilling sexual partner, rather than his wife. According to this version of the story, Metis transformed into many different shapes in effort to escape Zeus, but Zeus successfully raped her and swallowed her. After swallowing Metis, Zeus took six more wives in succession until he married his seventh and present wife, Hera. Then Zeus experienced an enormous headache. He was in such pain that he ordered someone (either Prometheus, Hephaestus, Hermes, Ares, or Palaemon, depending on the sources examined) to cleave his head open with the labrys, the double-headed Minoan axe. Athena leaped from Zeus's head, fully grown and armed. The "First Homeric Hymn to Athena" states in lines 9–16 that the gods were awestruck by Athena's appearance and even Helios, the god of the sun, stopped his chariot in the sky. Pindar, in his "Seventh Olympian Ode", states that she "cried aloud with a mighty shout" and that "the Sky and mother Earth shuddered before her." Hesiod states that Hera was so annoyed at Zeus for having given birth to a child on his own that she conceived and bore Hephaestus by herself, but in Imagines 2. 27 (trans. Fairbanks), the third-century AD Greek rhetorician Philostratus the Elder writes that Hera "rejoices" at Athena's birth "as though Athena were her daughter also." The second-century AD Christian apologist Justin Martyr takes issue with those pagans who erect at springs images of Kore, whom he interprets as Athena: "They said that Athena was the daughter of Zeus not from intercourse, but when the god had in mind the making of a world through a word (logos) his first thought was Athena." According to a version of the story in a scholium on the Iliad (found nowhere else), when Zeus swallowed Metis, she was pregnant with Athena by the Cyclops Brontes. The Etymologicum Magnum instead deems Athena the daughter of the Daktyl Itonos. Fragments attributed by the Christian Eusebius of Caesarea to the semi-legendary Phoenician historian Sanchuniathon, which Eusebius thought had been written before the Trojan war, make Athena instead the daughter of Cronus, a king of Byblos who visited "the inhabitable world" and bequeathed Attica to Athena. Lady of Athens In Homer's Iliad, Athena, as a war goddess, inspired and fought alongside the Greek heroes; her aid was synonymous with military prowess. Also in the Iliad, Zeus, the chief god, specifically assigned the sphere of war to Ares, the god of war, and Athena. Athena's moral and military superiority to Ares derived in part from the fact that she represented the intellectual and civilized side of war and the virtues of justice and skill, whereas Ares represented mere blood lust. Her superiority also derived in part from the vastly greater variety and importance of her functions and the patriotism of Homer's predecessors, Ares being of foreign origin. In the Iliad, Athena was the divine form of the heroic, martial ideal: she personified excellence in close combat, victory, and glory. The qualities that led to victory were found on the aegis, or breastplate, that Athena wore when she went to war: fear, strife, defense, and assault. Athena appears in Homer's Odyssey as the tutelary deity of Odysseus, and myths from later sources portray her similarly as the helper of Perseus and Heracles (Hercules). As the guardian of the welfare of kings, Athena became the goddess of good counsel, prudent restraint and practical insight, and war. In a founding myth reported by Pseudo-Apollodorus, Athena competed with Poseidon for the patronage of Athens. They agreed that each would give the Athenians one gift and that Cecrops, the king of Athens, would determine which gift was better. Poseidon struck the ground with his trident and a salt water spring sprang up; this gave the Athenians access to trade and water. Athens at its height was a significant sea power, defeating the Persian fleet at the Battle of Salamis—but the water was salty and undrinkable. In an alternative version of the myth from Vergil's Georgics, Poseidon instead gave the Athenians the first horse. Athena offered the first domesticated olive tree. Cecrops accepted this gift and declared Athena the patron goddess of Athens. The olive tree brought wood, oil, and food, and became a symbol of Athenian economic prosperity. Robert Graves was of the opinion that "Poseidon's attempts to take possession of certain cities are political myths", which reflect the conflict between matriarchal and patriarchal religions. Afterwards, Poseidon was so angry over his defeat that he sent one of his sons, Halirrhothius, to cut down the tree. But as he swung his axe, he missed his aim and it fell in himself, killing him. This was supposedly the origin of calling Athena's sacred olive tree moria, for Halirrhotius's attempt at revenge proved fatal (moros in Greek). Poseidon in fury accused Ares of murder, and the matter was eventually settled on the Areopagus ("hill of Ares") in favour of Ares, which was thereafter named after the event. Pseudo-Apollodorus records an archaic legend, which claims that Hephaestus once attempted to rape Athena, but she pushed him away, causing him to ejaculate on her thigh. Athena wiped the semen off using a tuft of wool, which she tossed into the dust, impregnating Gaia and causing her to give birth to Erichthonius. Athena adopted Erichthonius as her son and raised him. The Roman mythographer Hyginus records a similar story in which Hephaestus demanded Zeus to let him marry Athena since he was the one who had smashed open Zeus's skull, allowing Athena to be born. Zeus agreed to this and Hephaestus and Athena were married, but, when Hephaestus was about to consummate the union, Athena vanished from the bridal bed, causing him to ejaculate on the floor, thus impregnating Gaia with Erichthonius. The geographer Pausanias records that Athena placed the infant Erichthonius into a small chest (cista), which she entrusted to the care of the three daughters of Cecrops: Herse, Pandrosos, and Aglauros of Athens. She warned the three sisters not to open the chest, but did not explain to them why or what was in it. Aglauros, and possibly one of the other sisters, opened the chest. Differing reports say that they either found that the child itself was a serpent, that it was guarded by a serpent, that it was guarded by two serpents, or that it had the legs of a serpent. In Pausanias's story, the two sisters were driven mad by the sight of the chest's contents and hurled themselves off the Acropolis, dying instantly, but an Attic vase painting shows them being chased by the serpent off the edge of the cliff instead. Erichthonius was one of the most important founding heroes of Athens and the legend of the daughters of Cecrops was a cult myth linked to the rituals of the Arrhephoria festival. Pausanias records that, during the Arrhephoria, two young girls known as the Arrhephoroi, who lived near the temple of Athena Polias, would be given hidden objects by the priestess of Athena, which they would carry on their heads down a natural underground passage. They would leave the objects they had been given at the bottom of the passage and take another set of hidden objects, which they would carry on their heads back up to the temple. The ritual was performed in the dead of night and no one, not even the priestess, knew what the objects were. The serpent in the story may be the same one depicted coiled at Athena's feet in Pheidias's famous statue of the Athena Parthenos in the Parthenon. Many of the surviving sculptures of Athena show this serpent. Herodotus records that a serpent lived in a crevice on the north side of the summit of the Athenian Acropolis and that the Athenians left a honey cake for it each month as an offering. On the eve of the Second Persian invasion of Greece in 480 BC, the serpent did not eat the honey cake and the Athenians interpreted it as a sign that Athena herself had abandoned them. Another version of the myth of the Athenian maidens is told in Metamorphoses by the Roman poet Ovid (43 BC17 AD); in this late variant Hermes falls in love with Herse. Herse, Aglaulus, and Pandrosus go to the temple to offer sacrifices to Athena. Hermes demands help from Aglaulus to seduce Herse. Aglaulus demands money in exchange. Hermes gives her the money the sisters have already offered to Athena. As punishment for Aglaulus's greed, Athena asks the goddess Envy to make Aglaulus jealous of Herse. When Hermes arrives to seduce Herse, Aglaulus stands in his way instead of helping him as she had agreed. He turns her to stone. Athena gave her favour to an Attic girl named Myrsine, a chaste girl who outdid all her fellow athletes in both the palaestra and the race. Out of envy, the other athletes murdered her, but Athena took pity in her and transformed her dead body into a myrtle, a plant thereafter as favoured by her as the olive was. An almost exact story was said about another girl, Elaea, who transformed into an olive, Athena's sacred tree. Patron of heroes According to Pseudo-Apollodorus's Bibliotheca, Athena advised Argos, the builder of the Argo, the ship on which the hero Jason and his band of Argonauts sailed, and aided in the ship's construction. Pseudo-Apollodorus also records that Athena guided the hero Perseus in his quest to behead Medusa. She and Hermes, the god of travelers, appeared to Perseus after he set off on his quest and gifted him with tools he would need to kill the Gorgon. Athena gave Perseus a polished bronze shield to view Medusa's reflection rather than looking at her directly and thereby avoid being turned to stone. Hermes gave him an adamantine scythe to cut off Medusa's head. When Perseus swung his blade to behead Medusa, Athena guided it, allowing his scythe to cut it clean off. According to Pindar's Thirteenth Olympian Ode, Athena helped the hero Bellerophon tame the winged horse Pegasus by giving him a bit. In ancient Greek art, Athena is frequently shown aiding the hero Heracles. She appears in four of the twelve metopes on the Temple of Zeus at Olympia depicting Heracles's Twelve Labors, including the first, in which she passively watches him slay the Nemean lion, and the tenth, in which she is shown actively helping him hold up the sky. She is presented as his "stern ally", but also the "gentle... acknowledger of his achievements." Artistic depictions of Heracles's apotheosis show Athena driving him to Mount Olympus in her chariot and presenting him to Zeus for his deification. In Aeschylus's tragedy Orestes, Athena intervenes to save Orestes from the wrath of the Erinyes and presides over his trial for the murder of his mother Clytemnestra. When half the jury votes to acquit and the other half votes to convict, Athena casts the deciding vote to acquit Orestes and declares that, from then on, whenever a jury is tied, the defendant shall always be acquitted. In The Odyssey, Odysseus' cunning and shrewd nature quickly wins Athena's favour. For the first part of the poem, however, she largely is confined to aiding him only from afar, mainly by implanting thoughts in his head during his journey home from Troy. Her guiding actions reinforce her role as the "protectress of heroes," or, as mythologian Walter Friedrich Otto dubbed her, the "goddess of nearness," due to her mentoring and motherly probing. It is not until he washes up on the shore of the island of the Phaeacians, where Nausicaa is washing her clothes that Athena arrives personally to provide more tangible assistance. She appears in Nausicaa's dreams to ensure that the princess rescues Odysseus and plays a role in his eventual escort to Ithaca. Athena appears to Odysseus upon his arrival, disguised as a herdsman; she initially lies and tells him that Penelope, his wife, has remarried and that he is believed to be dead, but Odysseus lies back to her, employing skillful prevarications to protect himself. Impressed by his resolve and shrewdness, she reveals herself and tells him what he needs to know to win back his kingdom. She disguises him as an elderly beggar so that he will not be recognized by the suitors or Penelope, and helps him to defeat the suitors. Athena also appears to Odysseus's son Telemachus. Her actions lead him to travel around to Odysseus's comrades and ask about his father. He hears stories about some of Odysseus's journey. Athena's push for Telemachus's journey helps him grow into the man role, that his father once held. She also plays a role in ending the resultant feud against the suitors' relatives. She instructs Laertes to throw his spear and to kill Eupeithes, the father of Antinous. Punishment myths The Gorgoneion appears to have originated as an apotropaic symbol intended to ward off evil. In a late myth invented to explain the origins of the Gorgon, Medusa is described as having been a young priestess who served in the temple of Athena in Athens. Poseidon lusted after Medusa, and raped her in the temple of Athena, refusing to allow her vow of chastity to stand in his way. Upon discovering the desecration of her temple, Athena transformed Medusa into a hideous monster with serpents for hair whose gaze would turn any mortal to stone. In his Twelfth Pythian Ode, Pindar recounts the story of how Athena invented the aulos, a kind of flute, in imitation of the lamentations of Medusa's sisters, the Gorgons, after she was beheaded by the hero Perseus. According to Pindar, Athena gave the aulos to mortals as a gift. Later, the comic playwright Melanippides of Melos ( 480-430 BC) embellished the story in his comedy Marsyas, claiming that Athena looked in the mirror while she was playing the aulos and saw how blowing into it puffed up her cheeks and made her look silly, so she threw the aulos away and cursed it so that whoever picked it up would meet an awful death. The aulos was picked up by the satyr Marsyas, who was later killed by Apollo for his hubris. Later, this version of the story became accepted as canonical and the Athenian sculptor Myron created a group of bronze sculptures based on it, which was installed before the western front of the Parthenon in around 440 BC. A myth told by the early third-century BC Hellenistic poet Callimachus in his Hymn 5 begins with Athena bathing in a spring on Mount Helicon at midday with one of her favorite companions, the nymph Chariclo. Chariclo's son Tiresias happened to be hunting on the same mountain and came to the spring searching for water. He inadvertently saw Athena naked, so she struck him blind to ensure he would never again see what man was not intended to see. Chariclo intervened on her son's behalf and begged Athena to have mercy. Athena replied that she could not restore Tiresias's eyesight, so, instead, she gave him the ability to understand the language of the birds and thus foretell the future. Myrmex was a clever and chaste Attic girl who became quickly a favourite of Athena. However when Athena invented the plough, Myrmex went to the Atticans and told them that it was in fact her own invention. Hurt by the girl's betrayal, Athena transformed her into the small insect bearing her name, the ant. The fable of Arachne appears in Ovid's Metamorphoses (8 AD) (vi.5–54 and 129–145), which is nearly the only extant source for the legend. The story does not appear to have been well known prior to Ovid's rendition of it and the only earlier reference to it is a brief allusion in Virgil's Georgics, (29 BC) (iv, 246) that does not mention Arachne by name. According to Ovid, Arachne (whose name means spider in ancient Greek) was the daughter of a famous dyer in Tyrian purple in Hypaipa of Lydia, and a weaving student of Athena. She became so conceited of her skill as a weaver that she began claiming that her skill was greater than that of Athena herself. Athena gave Arachne a chance to redeem herself by assuming the form of an old woman and warning Arachne not to offend the deities. Arachne scoffed and wished for a weaving contest, so she could prove her skill. Athena wove the scene of her victory over Poseidon in the contest for the patronage of Athens. Athena's tapestry also depicted the 12 Olympian gods and defeat of mythological figures who challenged their authority. Arachne's tapestry featured twenty-one episodes of the deities' infidelity, including Zeus being unfaithful with Leda, with Europa, and with Danaë. It represented the unjust and discrediting behavior of the gods towards mortals. Athena admitted that Arachne's work was flawless, but was outraged at Arachne's offensive choice of subject, which displayed the failings and transgressions of the deities. Finally, losing her temper, Athena destroyed Arachne's tapestry and loom, striking it with her shuttle. Athena then struck Arachne across the face with her staff four times. Arachne hanged herself in despair, but Athena took pity on her and brought her back from the dead in the form of a spider. In a rarer version, surviving in the scholia of an unnamed scholiast on Nicander, whose works heavily influenced Ovid, Arachne is placed in Attica instead and has a brother named Phalanx. Athena taught Arachne the art of weaving and Phalanx the art of war, but when brother and sister laid together in bed, Athena was so disgusted with them that she turned them both into spiders, animals forever doomed to be eaten by their own young. Trojan War The myth of the Judgement of Paris is mentioned briefly in the Iliad, but is described in depth in an epitome of the Cypria, a lost poem of the Epic Cycle, which records that all the gods and goddesses as well as various mortals were invited to the marriage of Peleus and Thetis (the eventual parents of Achilles). Only Eris, goddess of discord, was not invited. She was annoyed at this, so she arrived with a golden apple inscribed with the word καλλίστῃ (kallistēi, "for the fairest"), which she threw among the goddesses. Aphrodite, Hera, and Athena all claimed to be the fairest, and thus the rightful owner of the apple. The goddesses chose to place the matter before Zeus, who, not wanting to favor one of the goddesses, put the choice into the hands of Paris, a Trojan prince. After bathing in the spring of Mount Ida where Troy was situated, the goddesses appeared before Paris for his decision. In the extant ancient depictions of the Judgement of Paris, Aphrodite is only occasionally represented nude, and Athena and Hera are always fully clothed. Since the Renaissance, however, Western paintings have typically portrayed all three goddesses as completely naked. All three goddesses were ideally beautiful and Paris could not decide between them, so they resorted to bribes. Hera tried to bribe Paris with power over all Asia and Europe, and Athena offered fame and glory in battle, but Aphrodite promised Paris that, if he were to choose her as the fairest, she would let him marry the most beautiful woman on earth. This woman was Helen, who was already married to King Menelaus of Sparta. Paris selected Aphrodite and awarded her the apple. The other two goddesses were enraged and, as a direct result, sided with the Greeks in the Trojan War. In Books V–VI of the Iliad, Athena aids the hero Diomedes, who, in the absence of Achilles, proves himself to be the most effective Greek warrior. Several artistic representations from the early sixth century BC may show Athena and Diomedes, including an early sixth-century BC shield band depicting Athena and an unidentified warrior riding on a chariot, a vase painting of a warrior with his charioteer facing Athena, and an inscribed clay plaque showing Diomedes and Athena riding in a chariot. Numerous passages in the Iliad also mention Athena having previously served as the patron of Diomedes's father Tydeus. When the Trojan women go to the temple of Athena on the Acropolis to plead her for protection from Diomedes, Athena ignores them. Athena also gets into a duel with Ares, the god of the brutal wars, and her male counterpart Ares blames her for encouraging Diomedes to tear his beautiful flesh. He curses her and strikes with all his strength. Athena deflects his blow with her aegis, a powerful shield that even Zeus's thunderbolt and lightning cannot blast through. Athena picked up a massive boulder and threw it at Ares, who immediately crumpled to the ground. Aphrodite, who was a lover of Ares, came down from Olympus to carry Ares away but was struck by Athena's golden spear and fell. Athena taunted the gods who supported Troy, saying that they will too eventually end up like Ares and Aphrodite, which scared them, therefore proving her power and reputation among the other gods. In Book XXII of the Iliad, while Achilles is chasing Hector around the walls of Troy, Athena appears to Hector disguised as his brother Deiphobus and persuades him to hold his ground so that they can fight Achilles together. Then, Hector throws his spear at Achilles and misses, expecting Deiphobus to hand him another, but Athena disappears instead, leaving Hector to face Achilles alone without his spear. In Sophocles's tragedy Ajax, she punishes Odysseus's rival Ajax the Great, driving him insane and causing him to massacre the Achaeans' cattle, thinking that he is slaughtering the Achaeans themselves. Even after Odysseus himself expresses pity for Ajax, Athena declares, "To laugh at your enemies - what sweeter laughter can there be than that?" (lines 78–9). Ajax later commits suicide as a result of his humiliation. Classical art Athena appears frequently in classical Greek art, including on coins and in paintings on ceramics. She is especially prominent in works produced in Athens. In classical depictions, Athena is usually portrayed standing upright, wearing a full-length chiton. She is most often represented dressed in armor like a male soldier and wearing a Corinthian helmet raised high atop her forehead. Her shield bears at its centre the aegis with the head of the gorgon (gorgoneion) in the center and snakes around the edge. Sometimes she is shown wearing the aegis as a cloak. As Athena Promachos, she is shown brandishing a spear. Scenes in which Athena was represented include her birth from the head of Zeus, her battle with the Gigantes, the birth of Erichthonius, and the Judgement of Paris. The Mourning Athena or Athena Meditating is a famous relief sculpture dating to around 470-460 BC that has been interpreted to represent Athena Polias. The most famous classical depiction of Athena was the Athena Parthenos, a now-lost gold and ivory statue of her in the Parthenon created by the Athenian sculptor Phidias. Copies reveal that this statue depicted Athena holding her shield in her left hand with Nike, the winged goddess of victory, standing in her right. Athena Polias is also represented in a Neo-Attic relief now held in the Virginia Museum of Fine Arts, which depicts her holding an owl in her hand and wearing her characteristic Corinthian helmet while resting her shield against a nearby herma. The Roman goddess Minerva adopted most of Athena's Greek iconographical associations, but was also integrated into the Capitoline Triad. Post-classical culture Art and symbolism Early Christian writers, such as Clement of Alexandria and Firmicus, denigrated Athena as representative of all the things that were detestable about paganism; they condemned her as "immodest and immoral". During the Middle Ages, however, many attributes of Athena were given to the Virgin Mary, who, in fourth-century portrayals, was often depicted wearing the Gorgoneion. Some even viewed the Virgin Mary as a warrior maiden, much like Athena Parthenos; one anecdote tells that the Virgin Mary once appeared upon the walls of Constantinople when it was under siege by the Avars, clutching a spear and urging the people to fight. During the Middle Ages, Athena became widely used as a Christian symbol and allegory, and she appeared on the family crests of certain noble houses. During the Renaissance, Athena donned the mantle of patron of the arts and human endeavor; allegorical paintings involving Athena were a favorite of the Italian Renaissance painters. In Sandro Botticelli's painting Pallas and the Centaur, probably painted sometime in the 1480s, Athena is the personification of chastity, who is shown grasping the forelock of a centaur, who represents lust. Andrea Mantegna's 1502 painting Minerva Expelling the Vices from the Garden of Virtue uses Athena as the personification of Graeco-Roman learning chasing the vices of medievalism from the garden of modern scholarship. Athena is also used as the personification of wisdom in Bartholomeus Spranger's 1591 painting The Triumph of Wisdom or Minerva Victorious over Ignorance. During the sixteenth and seventeenth centuries, Athena was used as a symbol for female rulers. In his book A Revelation of the True Minerva (1582), Thomas Blennerhassett portrays Queen Elizabeth I of England as a "new Minerva" and "the greatest goddesse nowe on earth". A series of paintings by Peter Paul Rubens depict Athena as Marie de' Medici's patron and mentor; the final painting in the series goes even further and shows Marie de' Medici with Athena's iconography, as the mortal incarnation of the goddess herself. The Flemish sculptor Jean-Pierre-Antoine Tassaert (Jan Peter Anton Tassaert) later portrayed Catherine II of Russia as Athena in a marble bust in 1774. During the French Revolution, statues of pagan gods were torn down all throughout France, but statues of Athena were not. Instead, Athena was transformed into the personification of freedom and the republic and a statue of the goddess stood in the center of the Place de la Revolution in Paris. In the years following the Revolution, artistic representations of Athena proliferated. A statue of Athena stands directly in front of the Austrian Parliament Building in Vienna, and depictions of Athena have influenced other symbols of Western freedom, including the Statue of Liberty and Britannia. For over a century, a full-scale replica of the Parthenon has stood in Nashville, Tennessee. In 1990, the curators added a gilded forty-two-foot (12.5 m) tall replica of Phidias's Athena Parthenos, built from concrete and fiberglass. The Great Seal of California bears the image of Athena kneeling next to a brown grizzly bear. Athena has occasionally appeared on modern coins, as she did on the ancient Athenian drachma. Her head appears on the $50 1915-S Panama-Pacific commemorative coin. Modern interpretations One of Sigmund Freud's most treasured possessions was a small, bronze sculpture of Athena, which sat on his desk. Freud once described Athena as "a woman who is unapproachable and repels all sexual desires - since she displays the terrifying genitals of the Mother." Feminist views on Athena are sharply divided; some feminists regard her as a symbol of female empowerment, while others regard her as "the ultimate patriarchal sell out... who uses her powers to promote and advance men rather than others of her sex." In contemporary Wicca, Athena is venerated as an aspect of the Goddess and some Wiccans believe that she may bestow the "Owl Gift" ("the ability to write and communicate clearly") upon her worshippers. Due to her status as one of the twelve Olympians, Athena is a major deity in Hellenismos, a Neopagan religion which seeks to authentically revive and recreate the religion of ancient Greece in the modern world. Athena is a natural patron of universities: At Bryn Mawr College in Pennsylvania, a statue of Athena (a replica of the original bronze one in the arts and archaeology library) resides in the Great Hall. It is traditional at exam time for students to leave offerings to the goddess with a note asking for good luck, or to repent for accidentally breaking any of the college's numerous other traditions. Pallas Athena is the tutelary goddess of the international social fraternity Phi Delta Theta. Her owl is also a symbol of the fraternity. Genealogy See also Athenaeum (disambiguation) Ambulia, a Spartan epithet used for Athena, Zeus, and Castor and Pollux Notes References Bibliography Ancient sources Apollodorus, Library, 3,180 Augustine, De civitate dei xviii.8–9 Cicero, De natura deorum iii.21.53, 23.59 Eusebius, Chronicon 30.21–26, 42.11–14 Homer, The Iliad with an English Translation by A.T. Murray, PhD in two volumes. Cambridge, Massachusetts., Harvard University Press; London, William Heinemann, Ltd. 1924. Online version at the Perseus Digital Library . Homer; The Odyssey with an English Translation by A.T. Murray, PH.D. in two volumes. Cambridge, Massachusetts., Harvard University Press; London, William Heinemann, Ltd. 1919. Online version at the Perseus Digital Library . Hesiod, Theogony, in The Homeric Hymns and Homerica with an English Translation by Hugh G. Evelyn-White, Cambridge, Massachusetts., Harvard University Press; London, William Heinemann Ltd. 1914. Online version at the Perseus Digital Library . Lactantius, Divinae institutions i.17.12–13, 18.22–23 Livy, Ab urbe condita libri vii.3.7 Lucan, Bellum civile ix.350 Modern sources Gantz, Timothy, Early Greek Myth: A Guide to Literary and Artistic Sources, Johns Hopkins University Press, 1996, Two volumes: (Vol. 1), (Vol. 2). Harrison, Jane Ellen, 1903. Prolegomena to the Study of Greek Religion. Telenius, Seppo Sakari, (2005) 2006. Athena-Artemis (Helsinki: Kirja kerrallaan). External links ATHENA on the Perseus Project ATHENA from The Theoi Project ATHENA from Mythopedia The Warburg Institute Iconographic Database (images of Athena) Crafts goddesses Greek war deities Greek virgin goddesses Justice goddesses Peace goddesses Smithing goddesses Tutelary goddesses War goddesses Wisdom goddesses Women metalsmiths Snake goddesses Agricultural goddesses New religious movement deities Children of Zeus Metamorphoses characters Deeds of Poseidon Rape of Persephone Deities in the Iliad Attic mythology Civic personifications Women in Greek mythology Textiles in folklore Characters in the Odyssey Women warriors Women of the Trojan war Twelve Olympians Kourotrophoi Arts goddesses Shapeshifters in Greek mythology Odyssean gods	6
The Amber Diceless Roleplaying Game is a role-playing game created and written by Erick Wujcik, set in the fictional universe created by author Roger Zelazny for his Chronicles of Amber. The game is unusual in that no dice are used in resolving conflicts or player actions; instead a simple diceless system of comparative ability, and narrative description of the action by the players and gamemaster, is used to determine how situations are resolved. Amber DRPG was created in the 1980s, and is much more focused on relationships and roleplaying than most of the roleplaying games of that era. Most Amber characters are members of the two ruling classes in the Amber multiverse, and are much more advanced in matters of strength, endurance, psyche, warfare and sorcery than ordinary beings. This often means that the only individuals who are capable of opposing a character are from his or her family, a fact that leads to much suspicion and intrigue. History Erick Wujcik wanted to design a role-playing game based on Amber for West End Games, and they agreed to look at his work. Wujcik intended to integrate the feel of the Amber setting from the novels into a role-playing game, and playtested his system for a few months at the Michigan Gaming Center where he decided to try it out as a diceless game. West End Games was not interested in a diceless role-playing game, so Wujcik acquired the role-playing game rights to Amber and offered the game to R. Talsorian Games, until he withdrew over creative differences. Wujcik then founded Phage Press, and published Amber Diceless Role-playing in 1991. The original 256-page game book was published in 1991 by Phage Press, covering material from the first five novels (the "Corwin Cycle") and some details – sorcery and the Logrus – from the remaining five novels (the "Merlin Cycle"), in order to allow players to roleplay characters from the Courts of Chaos. Some details were changed slightly to allow more player choice – for example, players can be full Trump Artists without having walked the Pattern or the Logrus, which Merlin says is impossible; and players' psychic abilities are far greater than those shown in the books. A 256-page companion volume, Shadow Knight, was published in 1993. This supplemental rule book includes the remaining elements from the Merlin novels, such as Broken Patterns, and allows players to create Constructs such as Merlin's Ghostwheel. The book presents the second series of novels not as additions to the series' continuity but as an example of a roleplaying campaign with Merlin, Luke, Julia, Jurt and Coral as the PCs. The remainder of the book is a collection of essays on the game, statistics for the new characters and an update of the older ones in light of their appearance in the second series, and (perhaps most usefully for GMs) plot summaries of each of the ten books. The book includes some material from the short story "The Salesman's Tale," and some unpublished material cut from Prince of Chaos, notably Coral's pregnancy by Merlin. Both books were translated into French and published by Jeux Descartes in 1994 and 1995. A third book, Rebma, was promised. Cover art was commissioned and pre-orders were taken, but it was never published. Wujcik also expressed a desire to create a book giving greater detail to the Courts of Chaos. The publishing rights to the Amber DRPG games were acquired in 2004 by Guardians of Order, who took over sales of the game and announced their intention to release a new edition of the game. However, no new edition was released before Guardians of Order went out of business in 2006. The two existing books are now out-of-print, but they have been made available as PDF downloads. In June 2007 a new publishing company, headed by Edwin Voskamp and Eric Todd, was formed with the express purpose of bringing Amber DRPG back into print. The new company is named Diceless by Design. In May 2010, Rite Publishing secured a license from Diceless by Design to use the rules system with a new setting in the creation of a new product to be written by industry and system veteran Jason Durall. The project Lords of Gossamer & Shadow (Diceless) was funded via Kickstarter in May 2013. In Sept 2013 the project was completed, and on in Nov 2013 Lords of Gossamer and Shadow (Diceless) was released publicly in full-color Print and PDF, along with additional supplements and continued support. Setting The game is set in the multiverse described in Zelazny's Chronicles of Amber. The first book assumes that gamemasters will set their campaigns after the Patternfall war; that is, after the end of the fifth book in the series, The Courts of Chaos, but uses material from the following books to describe those parts of Zelazny's cosmology that were featured there in more detail. The Amber multiverse consists of Amber, a city at one pole of the universe wherein is found the Pattern, the symbol of Order; The Courts of Chaos, an assembly of worlds at the other pole where can be found the Logrus, the manifestation of Chaos, and the Abyss, the source or end of all reality; and Shadow, the collection of all possible universes (shadows) between and around them. Inhabitants of either pole can use one or both of the Pattern and the Logrus to travel through Shadow. It is assumed that players will portray the children of the main characters from the books – the ruling family of Amber, known as the Elder Amberites – or a resident of the Courts. However, since some feel that being the children of the main characters is too limiting, it is fairly common to either start with King Oberon's death before the book begins and roleplay the Elder Amberites as they vie for the throne; or to populate Amber from scratch with a different set of Elder Amberites. The former option is one presented in the book; the latter is known in the Amber community as an "Amethyst" game. A third option is to have the players portray Corwin's children, in an Amber-like city built around Corwin's pattern; this is sometimes called an "Argent" game, since one of Corwin's heraldic colours is Silver. System Attributes Characters in Amber DRPG are represented by four attributes: Psyche, Strength, Endurance and Warfare. Psyche is used for feats of willpower or magic Strength is used for feats of strength or unarmed combat Endurance is used for feats of endurance Warfare is used for armed combat, from duelling to commanding armies The attributes run from −25 (normal human level), through −10 (normal level for a denizen of the Courts of Chaos) and 0 (normal level for an inhabitant of Amber), upwards without limit. Scores above 0 are "ranked", with the highest score being ranked 1st, the next-highest 2nd, and so on. The character with 1st rank in each attribute is considered "superior" in that attribute, being considered to be substantially better than the character with 2nd rank even if the difference in scores is small. All else being equal, a character with a higher rank in an attribute will always win a contest based on that attribute. The Attribute Auction A character's ability scores are purchased during character creation in an auction; players get 100 character points, and bid on each attribute in turn. The character who bids the most for an attribute is "ranked" first and is considered superior to all other characters in that attribute. Unlike conventional auctions, bids are non-refundable; if one player bids 65 for psyche and another wins with a bid of 66, then the character with 66 is "superior" to the character with 65 even though there is only one bid difference. Instead, lower bidding characters are ranked in ascending order according to how much they have bid, the characters becoming progressively weaker in that attribute as they pay less for it. After the auction, players can secretly pay extra points to raise their ranks, but they can only pay to raise their scores to an existing rank. Further, a character with a bid-for rank is considered to have a slight advantage over character with a bought-up rank. The Auction simulates a 'history' of competition between the descendants of Oberon for player characters who have not had dozens of decades to get to know each other. Through the competitive Auction, characters may begin the game vying for standings. The auction serves to introduce some unpredictability into character creation without the need to resort to dice, cards, or other randomizing devices. A player may intend, for example, to create a character who is a strong, mighty warrior, but being "outplayed" in the auction may result in lower attribute scores than anticipated, therefore necessitating a change of character concept. Since a player cannot control another player's bids, and since all bids are non-refundable, the auction involves a considerable amount of strategizing and prioritization by players. A willingness to spend as many points as possible on an attribute may improve your chances of a high ranking, but too reckless a spending strategy could leave a player with few points to spend on powers and objects. In a hotly contested auction, such as for the important attribute of warfare, the most valuable skill is the ability to force one's opponents to back down. With two or more equally determined players, this can result in a "bidding war," in which the attribute is driven up by increments to large sums. An alternative strategy is to try to cow other players into submission with a high opening bid. Most players bid low amounts between one and ten points in an initial bid in order to feel out the competition and to save points for other uses. A high enough opening bid could signal a player's determination to be first ranked in that attribute, thereby dissuading others from competing. Psyche in Amber DRPG compared to the Chronicles Characters with high psyche are presented as having strong telepathic abilities, being able to hypnotise and even mentally dominate any character with lesser psyche with whom they can make eye-contact. This is likely due to three scenes in the Chronicles: first, when Eric paralyzes Corwin with an attack across the Trump and refuses to desist because one or the other would be dominated; second, when Corwin faces the demon Strygalldwir, it is able to wrestle mentally with him when their gazes meet; and third, when Fiona is able to keep Brand immobile in the final battle at the Courts of Chaos. However, in general, the books only feature mental battles when there is some reason for mind-to-mind contact (for example, Trump contact) and magic or Trump is involved in all three of the above conflicts, so it is not clear whether Zelazny intended his characters to have such a power; the combination of Brand's "living trump" powers and his high Psyche (as presented in the roleplaying game) would have guaranteed him victory over Corwin. Shadow Knight does address this inconsistency somewhat, by presenting the "living trump" abilities as somewhat limited. Powers Characters in Amber DRPG have access to the powers seen in the Chronicles of Amber: Pattern, Logrus, Shape-shifting, Trump, and magic. Pattern: A character who has walked the pattern can walk in shadow to any possible universe, and while there can manipulate probability. Logrus: A character who has mastered the Logrus can send out Logrus tendrils and pull themselves or objects through shadow. Shape-shifting: Shape-shifters can alter their physical form and abilities. Trump: Trump Artists can create Trumps, a sort of tarot card which allows mental communication and travel. The book features Trump portraits of each of the elder Amberites. The trump picture of Corwin is executed in a subtly different style – and has features very similar to Roger Zelazny's. Magic: Three types of magic are detailed: Power Words, with a quick, small effect; Sorcery, with pre-prepared spells as in many other game systems; and Conjuration, the creation of small objects. Each of the first four powers is available in an advanced form. Artifacts, Personal shadows and Constructs While a character with Pattern, Logrus or Conjuration can acquire virtually any object, players can choose to spend character points to obtain objects with particular virtues – unbreakability, or a mind of their own. Since they have paid points for the items, they are a part of the character's legend, and cannot lightly be destroyed. Similarly, a character can find any possible universe, but they can spend character points to know of or inhabit shadows which are (in some sense) "real" and therefore useful. The expansion, Shadow Knight, adds Constructs – artifacts with connections to shadows. Stuff Unspent character points become good stuff – a good luck for the character. Players are also allowed to overspend (in moderation), with the points becoming bad stuff – bad luck which the Gamemaster should inflict on the character. Stuff governs how non-player characters perceive and respond to the character: characters with good stuff will often receive friendly or helpful reactions, while characters with bad stuff are often treated with suspicion or hostility. As well as representing luck, stuff can be seen as representing a character's outlook on the universe: characters with good stuff seeing the multiverse as a cheerful place, while characters with bad stuff see it as hostile. Conflict resolution In any given fair conflict between two characters, the character with the higher score in the relevant attribute will eventually win. The key words here are fair and eventually – if characters' ranks are close, and the weaker character has obtained some advantage, then the weaker character can escape defeat or perhaps prevail. Close ranks result in longer contests while greater difference between ranks result in fast resolution. Alternatively, if characters' attribute ranks are close, the weaker character can try to change the relevant attribute by changing the nature of the conflict. For example, if two characters are wrestling the relevant attribute is Strength; a character could reveal a weapon, changing it to Warfare; they could try to overcome the other character's mind using a power, changing it to Psyche; or they could concentrate their strength on defense, changing it to Endurance. If there is a substantial difference between characters' ranks, the conflict is generally over before the weaker character can react. The "Golden Rule" Amber DRPG advises gamemasters to change rules as they see fit, even to the point of adding or removing powers or attributes. Reception In the June 1992 edition of Dragon (Issue 182), both Lester Smith and Allen Varney published reviews of this game. Smith admired the professional production qualities of the 256-page rulebook, noting that because it was Smyth sewn in 32-page signatures, the book would always lie flat when opened. However, he found the typeface difficult to read, and the lack a coherent hierarchy of rules increased the reading difficulty as well. Smith admired the Attribute Auction and point-buy system for skills, and the focus on roleplaying in place of dice-rolling, but he mused that all of the roleplaying would mean "GMs have to spend quite a bit of time and creative effort coming up with wide-reaching plots for their players to work through. Canned, linear adventures just won't serve." He concluded by stating that the diceless system is not for every gamer: "As impressed as I am with the game, do I think it is the 'end-all' of role-playing games, or that diceless systems are the wave of the future? I'll give a firm “No” on both counts... However, I certainly do think that the Amber Diceless Roleplaying Game is destined for great popularity and a niche among the most respected of role-playing game designs." Allen Varney thought the "Attribute Auction" to be "brilliant and elegant", but he wondered if character advancement was perhaps too slow to keep marginal players interested. He also believed that being a gamemaster would be "tough work. Proceed with caution." Varney recommended that players need some familiarity with the first five "Amber" novels by Zelazny. He concluded, "The intensity of the Amber game indicates [game designer Erik ] Wujcik is on to something. When success in every action depends on the role and not the roll, players develop a sense of both control and urgency, along with creativity that borders on mania." In Issue 65 of Challenge, Dirk DeJong had a good first impression of the game, especially the information provided about the Amber family members and their various flaws and strengths. However he found that "The biggest problem with this endeavor, and its downfall, is the nature of the conflict systems. First, they are diceless, really diceless, and don't involve any sort of random factors at all, aside from those that you can introduce by roleplaying them out. Thus, if you get involved with a character who's better than you at sword-fighting, even if only by one point out of 100, you're pretty much dead meat, unless you can act your way out." DeJong also disagreed with the suggestion that if the referee and players disagreed with a rule to simply remove it from the game. "I thought the entire idea of using rules and random results was to prevent the type of arguments that I can see arising from this setup." DeJong concluded on an ambivalent note, saying, "If you love Zelazny and the Amber series, jump on it, as this is the premier sourcebook for running an Amber campaign. [...] Personally, I just can't get turned on by a system that expects me to either be content with a simple subtraction of numbers to find out who won, or to describe an entire combat blow by blow, just so that I can attempt some trick to win." Loyd Blankenship reviewed Amber in Pyramid #2 (July/Aug., 1993), and stated that "Amber is a valuable resource to a GM - even if he isn't running an Amber game. For gamers who have an aspiring actor or actress lurking within their breast, or for someone running a campaign via electronic mail or message base, Amber should be given serious consideration." Community Despite the game's out-of-print status, a thriving convention scene exists supporting the game. Amber conventions, known as Ambercons, are held yearly in Massachusetts, Michigan, Portland (United States), Milton Keynes (England), Belfast (Northern Ireland) and Modena, Italy. Additionally, Phage Press published 12 volumes of a dedicated Amber DRPG magazine called Amberzine. Some Amberzine issues are still available from Phage Press. References Review External links The Official Amber DRPG and Erick Wujcik Forum The Official Amber DRPG and Erick Wujcik Forum (This site is no longer live) The Chronicles of Amber Fantasy role-playing games Role-playing games based on novels American role-playing games Role-playing games introduced in 1991 Role-playing game systems	6
An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity, and luster, but may have properties that differ from those of the pure metals, such as increased strength or hardness. In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. In an alloy, the atoms are joined by metallic bonding rather than by covalent bonds typically found in chemical compounds. The alloy constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies. Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy. They can be further classified as homogeneous (consisting of a single phase), or heterogeneous (consisting of two or more phases) or intermetallic. An alloy may be a solid solution of metal elements (a single phase, where all metallic grains (crystals) are of the same composition) or a mixture of metallic phases (two or more solutions, forming a microstructure of different crystals within the metal). Examples of alloys include red gold (gold and copper), white gold (gold and silver), sterling silver (silver and copper), steel or silicon steel (iron with non-metallic carbon or silicon respectively), solder, brass, pewter, duralumin, bronze, and amalgams. Alloys are used in a wide variety of applications, from the steel alloys, used in everything from buildings to automobiles to surgical tools, to exotic titanium alloys used in the aerospace industry, to beryllium-copper alloys for non-sparking tools. Characteristics An alloy is a mixture of chemical elements, which forms an impure substance (admixture) that retains the characteristics of a metal. An alloy is distinct from an impure metal in that, with an alloy, the added elements are well controlled to produce desirable properties, while impure metals such as wrought iron are less controlled, but are often considered useful. Alloys are made by mixing two or more elements, at least one of which is a metal. This is usually called the primary metal or the base metal, and the name of this metal may also be the name of the alloy. The other constituents may or may not be metals but, when mixed with the molten base, they will be soluble and dissolve into the mixture. The mechanical properties of alloys will often be quite different from those of its individual constituents. A metal that is normally very soft (malleable), such as aluminium, can be altered by alloying it with another soft metal, such as copper. Although both metals are very soft and ductile, the resulting aluminium alloy will have much greater strength. Adding a small amount of non-metallic carbon to iron trades its great ductility for the greater strength of an alloy called steel. Due to its very-high strength, but still substantial toughness, and its ability to be greatly altered by heat treatment, steel is one of the most useful and common alloys in modern use. By adding chromium to steel, its resistance to corrosion can be enhanced, creating stainless steel, while adding silicon will alter its electrical characteristics, producing silicon steel. Like oil and water, a molten metal may not always mix with another element. For example, pure iron is almost completely insoluble with copper. Even when the constituents are soluble, each will usually have a saturation point, beyond which no more of the constituent can be added. Iron, for example, can hold a maximum of 6.67% carbon. Although the elements of an alloy usually must be soluble in the liquid state, they may not always be soluble in the solid state. If the metals remain soluble when solid, the alloy forms a solid solution, becoming a homogeneous structure consisting of identical crystals, called a phase. If as the mixture cools the constituents become insoluble, they may separate to form two or more different types of crystals, creating a heterogeneous microstructure of different phases, some with more of one constituent than the other. However, in other alloys, the insoluble elements may not separate until after crystallization occurs. If cooled very quickly, they first crystallize as a homogeneous phase, but they are supersaturated with the secondary constituents. As time passes, the atoms of these supersaturated alloys can separate from the crystal lattice, becoming more stable, and forming a second phase that serves to reinforce the crystals internally. Some alloys, such as electrum—an alloy of silver and gold—occur naturally. Meteorites are sometimes made of naturally occurring alloys of iron and nickel, but are not native to the Earth. One of the first alloys made by humans was bronze, which is a mixture of the metals tin and copper. Bronze was an extremely useful alloy to the ancients, because it is much stronger and harder than either of its components. Steel was another common alloy. However, in ancient times, it could only be created as an accidental byproduct from the heating of iron ore in fires (smelting) during the manufacture of iron. Other ancient alloys include pewter, brass and pig iron. In the modern age, steel can be created in many forms. Carbon steel can be made by varying only the carbon content, producing soft alloys like mild steel or hard alloys like spring steel. Alloy steels can be made by adding other elements, such as chromium, molybdenum, vanadium or nickel, resulting in alloys such as high-speed steel or tool steel. Small amounts of manganese are usually alloyed with most modern steels because of its ability to remove unwanted impurities, like phosphorus, sulfur and oxygen, which can have detrimental effects on the alloy. However, most alloys were not created until the 1900s, such as various aluminium, titanium, nickel, and magnesium alloys. Some modern superalloys, such as incoloy, inconel, and hastelloy, may consist of a multitude of different elements. An alloy is technically an impure metal, but when referring to alloys, the term impurities usually denotes undesirable elements. Such impurities are introduced from the base metals and alloying elements, but are removed during processing. For instance, sulfur is a common impurity in steel. Sulfur combines readily with iron to form iron sulfide, which is very brittle, creating weak spots in the steel. Lithium, sodium and calcium are common impurities in aluminium alloys, which can have adverse effects on the structural integrity of castings. Conversely, otherwise pure-metals that contain unwanted impurities are often called "impure metals" and are not usually referred to as alloys. Oxygen, present in the air, readily combines with most metals to form metal oxides; especially at higher temperatures encountered during alloying. Great care is often taken during the alloying process to remove excess impurities, using fluxes, chemical additives, or other methods of extractive metallurgy. Theory Alloying a metal is done by combining it with one or more other elements. The most common and oldest alloying process is performed by heating the base metal beyond its melting point and then dissolving the solutes into the molten liquid, which may be possible even if the melting point of the solute is far greater than that of the base. For example, in its liquid state, titanium is a very strong solvent capable of dissolving most metals and elements. In addition, it readily absorbs gases like oxygen and burns in the presence of nitrogen. This increases the chance of contamination from any contacting surface, and so must be melted in vacuum induction-heating and special, water-cooled, copper crucibles. However, some metals and solutes, such as iron and carbon, have very high melting-points and were impossible for ancient people to melt. Thus, alloying (in particular, interstitial alloying) may also be performed with one or more constituents in a gaseous state, such as found in a blast furnace to make pig iron (liquid-gas), nitriding, carbonitriding or other forms of case hardening (solid-gas), or the cementation process used to make blister steel (solid-gas). It may also be done with one, more, or all of the constituents in the solid state, such as found in ancient methods of pattern welding (solid-solid), shear steel (solid-solid), or crucible steel production (solid-liquid), mixing the elements via solid-state diffusion. By adding another element to a metal, differences in the size of the atoms create internal stresses in the lattice of the metallic crystals; stresses that often enhance its properties. For example, the combination of carbon with iron produces steel, which is stronger than iron, its primary element. The electrical and thermal conductivity of alloys is usually lower than that of the pure metals. The physical properties, such as density, reactivity, Young's modulus of an alloy may not differ greatly from those of its base element, but engineering properties such as tensile strength, ductility, and shear strength may be substantially different from those of the constituent materials. This is sometimes a result of the sizes of the atoms in the alloy, because larger atoms exert a compressive force on neighboring atoms, and smaller atoms exert a tensile force on their neighbors, helping the alloy resist deformation. Sometimes alloys may exhibit marked differences in behavior even when small amounts of one element are present. For example, impurities in semiconducting ferromagnetic alloys lead to different properties, as first predicted by White, Hogan, Suhl, Tian Abrie and Nakamura. Unlike pure metals, most alloys do not have a single melting point, but a melting range during which the material is a mixture of solid and liquid phases (a slush). The temperature at which melting begins is called the solidus, and the temperature when melting is just complete is called the liquidus. For many alloys there is a particular alloy proportion (in some cases more than one), called either a eutectic mixture or a peritectic composition, which gives the alloy a unique and low melting point, and no liquid/solid slush transition. Heat treatment Alloying elements are added to a base metal, to induce hardness, toughness, ductility, or other desired properties. Most metals and alloys can be work hardened by creating defects in their crystal structure. These defects are created during plastic deformation by hammering, bending, extruding, et cetera, and are permanent unless the metal is recrystallized. Otherwise, some alloys can also have their properties altered by heat treatment. Nearly all metals can be softened by annealing, which recrystallizes the alloy and repairs the defects, but not as many can be hardened by controlled heating and cooling. Many alloys of aluminium, copper, magnesium, titanium, and nickel can be strengthened to some degree by some method of heat treatment, but few respond to this to the same degree as does steel. The base metal iron of the iron-carbon alloy known as steel, undergoes a change in the arrangement (allotropy) of the atoms of its crystal matrix at a certain temperature (usually between and , depending on carbon content). This allows the smaller carbon atoms to enter the interstices of the iron crystal. When this diffusion happens, the carbon atoms are said to be in solution in the iron, forming a particular single, homogeneous, crystalline phase called austenite. If the steel is cooled slowly, the carbon can diffuse out of the iron and it will gradually revert to its low temperature allotrope. During slow cooling, the carbon atoms will no longer be as soluble with the iron, and will be forced to precipitate out of solution, nucleating into a more concentrated form of iron carbide (Fe3C) in the spaces between the pure iron crystals. The steel then becomes heterogeneous, as it is formed of two phases, the iron-carbon phase called cementite (or carbide), and pure iron ferrite. Such a heat treatment produces a steel that is rather soft. If the steel is cooled quickly, however, the carbon atoms will not have time to diffuse and precipitate out as carbide, but will be trapped within the iron crystals. When rapidly cooled, a diffusionless (martensite) transformation occurs, in which the carbon atoms become trapped in solution. This causes the iron crystals to deform as the crystal structure tries to change to its low temperature state, leaving those crystals very hard but much less ductile (more brittle). While the high strength of steel results when diffusion and precipitation is prevented (forming martensite), most heat-treatable alloys are precipitation hardening alloys, that depend on the diffusion of alloying elements to achieve their strength. When heated to form a solution and then cooled quickly, these alloys become much softer than normal, during the diffusionless transformation, but then harden as they age. The solutes in these alloys will precipitate over time, forming intermetallic phases, which are difficult to discern from the base metal. Unlike steel, in which the solid solution separates into different crystal phases (carbide and ferrite), precipitation hardening alloys form different phases within the same crystal. These intermetallic alloys appear homogeneous in crystal structure, but tend to behave heterogeneously, becoming hard and somewhat brittle. In 1906, precipitation hardening alloys were discovered by Alfred Wilm. Precipitation hardening alloys, such as certain alloys of aluminium, titanium, and copper, are heat-treatable alloys that soften when quenched (cooled quickly), and then harden over time. Wilm had been searching for a way to harden aluminium alloys for use in machine-gun cartridge cases. Knowing that aluminium-copper alloys were heat-treatable to some degree, Wilm tried quenching a ternary alloy of aluminium, copper, and the addition of magnesium, but was initially disappointed with the results. However, when Wilm retested it the next day he discovered that the alloy increased in hardness when left to age at room temperature, and far exceeded his expectations. Although an explanation for the phenomenon was not provided until 1919, duralumin was one of the first "age hardening" alloys used, becoming the primary building material for the first Zeppelins, and was soon followed by many others. Because they often exhibit a combination of high strength and low weight, these alloys became widely used in many forms of industry, including the construction of modern aircraft. Mechanisms When a molten metal is mixed with another substance, there are two mechanisms that can cause an alloy to form, called atom exchange and the interstitial mechanism. The relative size of each element in the mix plays a primary role in determining which mechanism will occur. When the atoms are relatively similar in size, the atom exchange method usually happens, where some of the atoms composing the metallic crystals are substituted with atoms of the other constituent. This is called a substitutional alloy. Examples of substitutional alloys include bronze and brass, in which some of the copper atoms are substituted with either tin or zinc atoms respectively. In the case of the interstitial mechanism, one atom is usually much smaller than the other and can not successfully substitute for the other type of atom in the crystals of the base metal. Instead, the smaller atoms become trapped in the interstitial sites between the atoms of the crystal matrix. This is referred to as an interstitial alloy. Steel is an example of an interstitial alloy, because the very small carbon atoms fit into interstices of the iron matrix. Stainless steel is an example of a combination of interstitial and substitutional alloys, because the carbon atoms fit into the interstices, but some of the iron atoms are substituted by nickel and chromium atoms. History and examples Meteoric iron The use of alloys by humans started with the use of meteoric iron, a naturally occurring alloy of nickel and iron. It is the main constituent of iron meteorites. As no metallurgic processes were used to separate iron from nickel, the alloy was used as it was. Meteoric iron could be forged from a red heat to make objects such as tools, weapons, and nails. In many cultures it was shaped by cold hammering into knives and arrowheads. They were often used as anvils. Meteoric iron was very rare and valuable, and difficult for ancient people to work. Bronze and brass Iron is usually found as iron ore on Earth, except for one deposit of native iron in Greenland, which was used by the Inuit. Native copper, however, was found worldwide, along with silver, gold, and platinum, which were also used to make tools, jewelry, and other objects since Neolithic times. Copper was the hardest of these metals, and the most widely distributed. It became one of the most important metals to the ancients. Around 10,000 years ago in the highlands of Anatolia (Turkey), humans learned to smelt metals such as copper and tin from ore. Around 2500 BC, people began alloying the two metals to form bronze, which was much harder than its ingredients. Tin was rare, however, being found mostly in Great Britain. In the Middle East, people began alloying copper with zinc to form brass. Ancient civilizations took into account the mixture and the various properties it produced, such as hardness, toughness and melting point, under various conditions of temperature and work hardening, developing much of the information contained in modern alloy phase diagrams. For example, arrowheads from the Chinese Qin dynasty (around 200 BC) were often constructed with a hard bronze-head, but a softer bronze-tang, combining the alloys to prevent both dulling and breaking during use. Amalgams Mercury has been smelted from cinnabar for thousands of years. Mercury dissolves many metals, such as gold, silver, and tin, to form amalgams (an alloy in a soft paste or liquid form at ambient temperature). Amalgams have been used since 200 BC in China for gilding objects such as armor and mirrors with precious metals. The ancient Romans often used mercury-tin amalgams for gilding their armor. The amalgam was applied as a paste and then heated until the mercury vaporized, leaving the gold, silver, or tin behind. Mercury was often used in mining, to extract precious metals like gold and silver from their ores. Precious metals Many ancient civilizations alloyed metals for purely aesthetic purposes. In ancient Egypt and Mycenae, gold was often alloyed with copper to produce red-gold, or iron to produce a bright burgundy-gold. Gold was often found alloyed with silver or other metals to produce various types of colored gold. These metals were also used to strengthen each other, for more practical purposes. Copper was often added to silver to make sterling silver, increasing its strength for use in dishes, silverware, and other practical items. Quite often, precious metals were alloyed with less valuable substances as a means to deceive buyers. Around 250 BC, Archimedes was commissioned by the King of Syracuse to find a way to check the purity of the gold in a crown, leading to the famous bath-house shouting of "Eureka!" upon the discovery of Archimedes' principle. Pewter The term pewter covers a variety of alloys consisting primarily of tin. As a pure metal, tin is much too soft to use for most practical purposes. However, during the Bronze Age, tin was a rare metal in many parts of Europe and the Mediterranean, so it was often valued higher than gold. To make jewellery, cutlery, or other objects from tin, workers usually alloyed it with other metals to increase strength and hardness. These metals were typically lead, antimony, bismuth or copper. These solutes were sometimes added individually in varying amounts, or added together, making a wide variety of objects, ranging from practical items such as dishes, surgical tools, candlesticks or funnels, to decorative items like ear rings and hair clips. The earliest examples of pewter come from ancient Egypt, around 1450 BC. The use of pewter was widespread across Europe, from France to Norway and Britain (where most of the ancient tin was mined) to the Near East. The alloy was also used in China and the Far East, arriving in Japan around 800 AD, where it was used for making objects like ceremonial vessels, tea canisters, or chalices used in shinto shrines. Iron The first known smelting of iron began in Anatolia, around 1800 BC. Called the bloomery process, it produced very soft but ductile wrought iron. By 800 BC, iron-making technology had spread to Europe, arriving in Japan around 700 AD. Pig iron, a very hard but brittle alloy of iron and carbon, was being produced in China as early as 1200 BC, but did not arrive in Europe until the Middle Ages. Pig iron has a lower melting point than iron, and was used for making cast-iron. However, these metals found little practical use until the introduction of crucible steel around 300 BC. These steels were of poor quality, and the introduction of pattern welding, around the 1st century AD, sought to balance the extreme properties of the alloys by laminating them, to create a tougher metal. Around 700 AD, the Japanese began folding bloomery-steel and cast-iron in alternating layers to increase the strength of their swords, using clay fluxes to remove slag and impurities. This method of Japanese swordsmithing produced one of the purest steel-alloys of the ancient world. While the use of iron started to become more widespread around 1200 BC, mainly because of interruptions in the trade routes for tin, the metal was much softer than bronze. However, very small amounts of steel, (an alloy of iron and around 1% carbon), was always a byproduct of the bloomery process. The ability to modify the hardness of steel by heat treatment had been known since 1100 BC, and the rare material was valued for the manufacture of tools and weapons. Because the ancients could not produce temperatures high enough to melt iron fully, the production of steel in decent quantities did not occur until the introduction of blister steel during the Middle Ages. This method introduced carbon by heating wrought iron in charcoal for long periods of time, but the absorption of carbon in this manner is extremely slow thus the penetration was not very deep, so the alloy was not homogeneous. In 1740, Benjamin Huntsman began melting blister steel in a crucible to even out the carbon content, creating the first process for the mass production of tool steel. Huntsman's process was used for manufacturing tool steel until the early 1900s. The introduction of the blast furnace to Europe in the Middle Ages meant that people could produce pig iron in much higher volumes than wrought iron. Because pig iron could be melted, people began to develop processes to reduce carbon in liquid pig iron to create steel. Puddling had been used in China since the first century, and was introduced in Europe during the 1700s, where molten pig iron was stirred while exposed to the air, to remove the carbon by oxidation. In 1858, Henry Bessemer developed a process of steel-making by blowing hot air through liquid pig iron to reduce the carbon content. The Bessemer process led to the first large scale manufacture of steel. Steel is an alloy of iron and carbon, but the term alloy steel usually only refers to steels that contain other elements— like vanadium, molybdenum, or cobalt—in amounts sufficient to alter the properties of the base steel. Since ancient times, when steel was used primarily for tools and weapons, the methods of producing and working the metal were often closely guarded secrets. Even long after the Age of reason, the steel industry was very competitive and manufacturers went through great lengths to keep their processes confidential, resisting any attempts to scientifically analyze the material for fear it would reveal their methods. For example, the people of Sheffield, a center of steel production in England, were known to routinely bar visitors and tourists from entering town to deter industrial espionage. Thus, almost no metallurgical information existed about steel until 1860. Because of this lack of understanding, steel was not generally considered an alloy until the decades between 1930 and 1970 (primarily due to the work of scientists like William Chandler Roberts-Austen, Adolf Martens, and Edgar Bain), so "alloy steel" became the popular term for ternary and quaternary steel-alloys. After Benjamin Huntsman developed his crucible steel in 1740, he began experimenting with the addition of elements like manganese (in the form of a high-manganese pig-iron called spiegeleisen), which helped remove impurities such as phosphorus and oxygen; a process adopted by Bessemer and still used in modern steels (albeit in concentrations low enough to still be considered carbon steel). Afterward, many people began experimenting with various alloys of steel without much success. However, in 1882, Robert Hadfield, being a pioneer in steel metallurgy, took an interest and produced a steel alloy containing around 12% manganese. Called mangalloy, it exhibited extreme hardness and toughness, becoming the first commercially viable alloy-steel. Afterward, he created silicon steel, launching the search for other possible alloys of steel. Robert Forester Mushet found that by adding tungsten to steel it could produce a very hard edge that would resist losing its hardness at high temperatures. "R. Mushet's special steel" (RMS) became the first high-speed steel. Mushet's steel was quickly replaced by tungsten carbide steel, developed by Taylor and White in 1900, in which they doubled the tungsten content and added small amounts of chromium and vanadium, producing a superior steel for use in lathes and machining tools. In 1903, the Wright brothers used a chromium-nickel steel to make the crankshaft for their airplane engine, while in 1908 Henry Ford began using vanadium steels for parts like crankshafts and valves in his Model T Ford, due to their higher strength and resistance to high temperatures. In 1912, the Krupp Ironworks in Germany developed a rust-resistant steel by adding 21% chromium and 7% nickel, producing the first stainless steel. Others Due to their high reactivity, most metals were not discovered until the 19th century. A method for extracting aluminium from bauxite was proposed by Humphry Davy in 1807, using an electric arc. Although his attempts were unsuccessful, by 1855 the first sales of pure aluminium reached the market. However, as extractive metallurgy was still in its infancy, most aluminium extraction-processes produced unintended alloys contaminated with other elements found in the ore; the most abundant of which was copper. These aluminium-copper alloys (at the time termed "aluminum bronze") preceded pure aluminium, offering greater strength and hardness over the soft, pure metal, and to a slight degree were found to be heat treatable. However, due to their softness and limited hardenability these alloys found little practical use, and were more of a novelty, until the Wright brothers used an aluminium alloy to construct the first airplane engine in 1903. During the time between 1865 and 1910, processes for extracting many other metals were discovered, such as chromium, vanadium, tungsten, iridium, cobalt, and molybdenum, and various alloys were developed. Prior to 1910, research mainly consisted of private individuals tinkering in their own laboratories. However, as the aircraft and automotive industries began growing, research into alloys became an industrial effort in the years following 1910, as new magnesium alloys were developed for pistons and wheels in cars, and pot metal for levers and knobs, and aluminium alloys developed for airframes and aircraft skins were put into use. See also Alloy broadening CALPHAD Ideal mixture List of alloys References Bibliography External links Metallurgy Chemistry	6
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer. The application of acoustics is present in almost all aspects of modern society with the most obvious being the audio and noise control industries. Hearing is one of the most crucial means of survival in the animal world and speech is one of the most distinctive characteristics of human development and culture. Accordingly, the science of acoustics spreads across many facets of human society—music, medicine, architecture, industrial production, warfare and more. Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or for marking territories. Art, craft, science and technology have provoked one another to advance the whole, as in many other fields of knowledge. Robert Bruce Lindsay's "Wheel of Acoustics" is a well accepted overview of the various fields in acoustics. History Etymology The word "acoustic" is derived from the Greek word ἀκουστικός (akoustikos), meaning "of or for hearing, ready to hear" and that from ἀκουστός (akoustos), "heard, audible", which in turn derives from the verb ἀκούω(akouo), "I hear". The Latin synonym is "sonic", after which the term sonics used to be a synonym for acoustics and later a branch of acoustics. Frequencies above and below the audible range are called "ultrasonic" and "infrasonic", respectively. Early research in acoustics In the 6th century BC, the ancient Greek philosopher Pythagoras wanted to know why some combinations of musical sounds seemed more beautiful than others, and he found answers in terms of numerical ratios representing the harmonic overtone series on a string. He is reputed to have observed that when the lengths of vibrating strings are expressible as ratios of integers (e.g. 2 to 3, 3 to 4), the tones produced will be harmonious, and the smaller the integers the more harmonious the sounds. For example, a string of a certain length would sound particularly harmonious with a string of twice the length (other factors being equal). In modern parlance, if a string sounds the note C when plucked, a string twice as long will sound a C an octave lower. In one system of musical tuning, the tones in between are then given by 16:9 for D, 8:5 for E, 3:2 for F, 4:3 for G, 6:5 for A, and 16:15 for B, in ascending order. Aristotle (384–322 BC) understood that sound consisted of compressions and rarefactions of air which "falls upon and strikes the air which is next to it...", a very good expression of the nature of wave motion. On Things Heard, generally ascribed to Strato of Lampsacus, states that the pitch is related to the frequency of vibrations of the air and to the speed of sound. In about 20 BC, the Roman architect and engineer Vitruvius wrote a treatise on the acoustic properties of theaters including discussion of interference, echoes, and reverberation—the beginnings of architectural acoustics. In Book V of his De architectura (The Ten Books of Architecture) Vitruvius describes sound as a wave comparable to a water wave extended to three dimensions, which, when interrupted by obstructions, would flow back and break up following waves. He described the ascending seats in ancient theaters as designed to prevent this deterioration of sound and also recommended bronze vessels of appropriate sizes be placed in theaters to resonate with the fourth, fifth and so on, up to the double octave, in order to resonate with the more desirable, harmonious notes. During the Islamic golden age, Abū Rayhān al-Bīrūnī (973-1048) is believed to have postulated that the speed of sound was much slower than the speed of light. The physical understanding of acoustical processes advanced rapidly during and after the Scientific Revolution. Mainly Galileo Galilei (1564–1642) but also Marin Mersenne (1588–1648), independently, discovered the complete laws of vibrating strings (completing what Pythagoras and Pythagoreans had started 2000 years earlier). Galileo wrote "Waves are produced by the vibrations of a sonorous body, which spread through the air, bringing to the tympanum of the ear a stimulus which the mind interprets as sound", a remarkable statement that points to the beginnings of physiological and psychological acoustics. Experimental measurements of the speed of sound in air were carried out successfully between 1630 and 1680 by a number of investigators, prominently Mersenne. Meanwhile, Newton (1642–1727) derived the relationship for wave velocity in solids, a cornerstone of physical acoustics (Principia, 1687). Age of Enlightenment and onward Substantial progress in acoustics, resting on firmer mathematical and physical concepts, was made during the eighteenth century by Euler (1707–1783), Lagrange (1736–1813), and d'Alembert (1717–1783). During this era, continuum physics, or field theory, began to receive a definite mathematical structure. The wave equation emerged in a number of contexts, including the propagation of sound in air. In the nineteenth century the major figures of mathematical acoustics were Helmholtz in Germany, who consolidated the field of physiological acoustics, and Lord Rayleigh in England, who combined the previous knowledge with his own copious contributions to the field in his monumental work The Theory of Sound (1877). Also in the 19th century, Wheatstone, Ohm, and Henry developed the analogy between electricity and acoustics. The twentieth century saw a burgeoning of technological applications of the large body of scientific knowledge that was by then in place. The first such application was Sabine's groundbreaking work in architectural acoustics, and many others followed. Underwater acoustics was used for detecting submarines in the first World War. Sound recording and the telephone played important roles in a global transformation of society. Sound measurement and analysis reached new levels of accuracy and sophistication through the use of electronics and computing. The ultrasonic frequency range enabled wholly new kinds of application in medicine and industry. New kinds of transducers (generators and receivers of acoustic energy) were invented and put to use. Definition Acoustics is defined by ANSI/ASA S1.1-2013 as "(a) Science of sound, including its production, transmission, and effects, including biological and psychological effects. (b) Those qualities of a room that, together, determine its character with respect to auditory effects." The study of acoustics revolves around the generation, propagation and reception of mechanical waves and vibrations. The steps shown in the above diagram can be found in any acoustical event or process. There are many kinds of cause, both natural and volitional. There are many kinds of transduction process that convert energy from some other form into sonic energy, producing a sound wave. There is one fundamental equation that describes sound wave propagation, the acoustic wave equation, but the phenomena that emerge from it are varied and often complex. The wave carries energy throughout the propagating medium. Eventually this energy is transduced again into other forms, in ways that again may be natural and/or volitionally contrived. The final effect may be purely physical or it may reach far into the biological or volitional domains. The five basic steps are found equally well whether we are talking about an earthquake, a submarine using sonar to locate its foe, or a band playing in a rock concert. The central stage in the acoustical process is wave propagation. This falls within the domain of physical acoustics. In fluids, sound propagates primarily as a pressure wave. In solids, mechanical waves can take many forms including longitudinal waves, transverse waves and surface waves. Acoustics looks first at the pressure levels and frequencies in the sound wave and how the wave interacts with the environment. This interaction can be described as either a diffraction, interference or a reflection or a mix of the three. If several media are present, a refraction can also occur. Transduction processes are also of special importance to acoustics. Fundamental concepts Wave propagation: pressure levels In fluids such as air and water, sound waves propagate as disturbances in the ambient pressure level. While this disturbance is usually small, it is still noticeable to the human ear. The smallest sound that a person can hear, known as the threshold of hearing, is nine orders of magnitude smaller than the ambient pressure. The loudness of these disturbances is related to the sound pressure level (SPL) which is measured on a logarithmic scale in decibels. Wave propagation: frequency Physicists and acoustic engineers tend to discuss sound pressure levels in terms of frequencies, partly because this is how our ears interpret sound. What we experience as "higher pitched" or "lower pitched" sounds are pressure vibrations having a higher or lower number of cycles per second. In a common technique of acoustic measurement, acoustic signals are sampled in time, and then presented in more meaningful forms such as octave bands or time frequency plots. Both of these popular methods are used to analyze sound and better understand the acoustic phenomenon. The entire spectrum can be divided into three sections: audio, ultrasonic, and infrasonic. The audio range falls between 20 Hz and 20,000 Hz. This range is important because its frequencies can be detected by the human ear. This range has a number of applications, including speech communication and music. The ultrasonic range refers to the very high frequencies: 20,000 Hz and higher. This range has shorter wavelengths which allow better resolution in imaging technologies. Medical applications such as ultrasonography and elastography rely on the ultrasonic frequency range. On the other end of the spectrum, the lowest frequencies are known as the infrasonic range. These frequencies can be used to study geological phenomena such as earthquakes. Analytic instruments such as the spectrum analyzer facilitate visualization and measurement of acoustic signals and their properties. The spectrogram produced by such an instrument is a graphical display of the time varying pressure level and frequency profiles which give a specific acoustic signal its defining character. Transduction in acoustics A transducer is a device for converting one form of energy into another. In an electroacoustic context, this means converting sound energy into electrical energy (or vice versa). Electroacoustic transducers include loudspeakers, microphones, particle velocity sensors, hydrophones and sonar projectors. These devices convert a sound wave to or from an electric signal. The most widely used transduction principles are electromagnetism, electrostatics and piezoelectricity. The transducers in most common loudspeakers (e.g. woofers and tweeters), are electromagnetic devices that generate waves using a suspended diaphragm driven by an electromagnetic voice coil, sending off pressure waves. Electret microphones and condenser microphones employ electrostatics—as the sound wave strikes the microphone's diaphragm, it moves and induces a voltage change. The ultrasonic systems used in medical ultrasonography employ piezoelectric transducers. These are made from special ceramics in which mechanical vibrations and electrical fields are interlinked through a property of the material itself. Acoustician An acoustician is an expert in the science of sound. Education There are many types of acoustician, but they usually have a Bachelor's degree or higher qualification. Some possess a degree in acoustics, while others enter the discipline via studies in fields such as physics or engineering. Much work in acoustics requires a good grounding in Mathematics and science. Many acoustic scientists work in research and development. Some conduct basic research to advance our knowledge of the perception (e.g. hearing, psychoacoustics or neurophysiology) of speech, music and noise. Other acoustic scientists advance understanding of how sound is affected as it moves through environments, e.g. underwater acoustics, architectural acoustics or structural acoustics. Other areas of work are listed under subdisciplines below. Acoustic scientists work in government, university and private industry laboratories. Many go on to work in Acoustical Engineering. Some positions, such as Faculty (academic staff) require a Doctor of Philosophy. Subdisciplines Archaeoacoustics Archaeoacoustics, also known as the archaeology of sound, is one of the only ways to experience the past with senses other than our eyes. Archaeoacoustics is studied by testing the acoustic properties of prehistoric sites, including caves. Iegor Rezkinoff, a sound archaeologist, studies the acoustic properties of caves through natural sounds like humming and whistling. Archaeological theories of acoustics are focused around ritualistic purposes as well as a way of echolocation in the caves. In archaeology, acoustic sounds and rituals directly correlate as specific sounds were meant to bring ritual participants closer to a spiritual awakening. Parallels can also be drawn between cave wall paintings and the acoustic properties of the cave; they are both dynamic. Because archaeoacoustics is a fairly new archaeological subject, acoustic sound is still being tested in these prehistoric sites today. Aeroacoustics Aeroacoustics is the study of noise generated by air movement, for instance via turbulence, and the movement of sound through the fluid air. This knowledge is applied in acoustical engineering to study how to quieten aircraft. Aeroacoustics is important for understanding how wind musical instruments work. Acoustic signal processing Acoustic signal processing is the electronic manipulation of acoustic signals. Applications include: active noise control; design for hearing aids or cochlear implants; echo cancellation; music information retrieval, and perceptual coding (e.g. MP3 or Opus). Architectural acoustics Architectural acoustics (also known as building acoustics) involves the scientific understanding of how to achieve good sound within a building. It typically involves the study of speech intelligibility, speech privacy, music quality, and vibration reduction in the built environment. Commonly studied environments are hospitals, classrooms, dwellings, performance venues, recording and broadcasting studios. Focus considerations include room acoustics, airborne and impact transmission in building structures, airborne and structure-borne noise control, noise control of building systems and electroacoustic systems . Bioacoustics Bioacoustics is the scientific study of the hearing and calls of animal calls, as well as how animals are affected by the acoustic and sounds of their habitat. Electroacoustics This subdiscipline is concerned with the recording, manipulation and reproduction of audio using electronics. This might include products such as mobile phones, large scale public address systems or virtual reality systems in research laboratories. Environmental noise and soundscapes Environmental acoustics is concerned with noise and vibration caused by railways, road traffic, aircraft, industrial equipment and recreational activities. The main aim of these studies is to reduce levels of environmental noise and vibration. Research work now also has a focus on the positive use of sound in urban environments: soundscapes and tranquility. Musical acoustics Musical acoustics is the study of the physics of acoustic instruments; the audio signal processing used in electronic music; the computer analysis of music and composition, and the perception and cognitive neuroscience of music. Noise The goal this acoustics sub-discipline is to reduce the impact of unwanted sound. Scope of noise studies includes the generation, propagation, and impact on structures, objects, and people. Innovative model development Measurement techniques Mitigation strategies Input to the establishment of standards and regulations Noise research investigates the impact of noise on humans and animals to include work in definitions, abatement, transportation noise, hearing protection, Jet and rocket noise, building system noise and vibration, atmospheric sound propagation, soundscapes, and low-frequency sound. Psychoacoustics Many studies have been conducted to identify the relationship between acoustics and cognition, or more commonly known as psychoacoustics, in which what one hears is a combination of perception and biological aspects. The information intercepted by the passage of sound waves through the ear is understood and interpreted through the brain, emphasizing the connection between the mind and acoustics. Psychological changes have been seen as brain waves slow down or speed up as a result of varying auditory stimulus which can in turn affect the way one thinks, feels, or even behaves. This correlation can be viewed in normal, everyday situations in which listening to an upbeat or uptempo song can cause one's foot to start tapping or a slower song can leave one feeling calm and serene. In a deeper biological look at the phenomenon of psychoacoustics, it was discovered that the central nervous system is activated by basic acoustical characteristics of music. By observing how the central nervous system, which includes the brain and spine, is influenced by acoustics, the pathway in which acoustic affects the mind, and essentially the body, is evident. Speech Acousticians study the production, processing and perception of speech. Speech recognition and Speech synthesis are two important areas of speech processing using computers. The subject also overlaps with the disciplines of physics, physiology, psychology, and linguistics. Structural Vibration and Dynamics Structural acoustics is the study of motions and interactions of mechanical systems with their environments and the methods of their measurement, analysis, and control . There are several sub-disciplines found within this regime: Modal Analysis Material characterization Structural health monitoring Acoustic Metamaterials Friction Acoustics Applications might include: ground vibrations from railways; vibration isolation to reduce vibration in operating theatres; studying how vibration can damage health (vibration white finger); vibration control to protect a building from earthquakes, or measuring how structure-borne sound moves through buildings. Ultrasonics Ultrasonics deals with sounds at frequencies too high to be heard by humans. Specialisms include medical ultrasonics (including medical ultrasonography), sonochemistry, ultrasonic testing, material characterisation and underwater acoustics (sonar). Underwater acoustics Underwater acoustics is the scientific study of natural and man-made sounds underwater. Applications include sonar to locate submarines, underwater communication by whales, climate change monitoring by measuring sea temperatures acoustically, sonic weapons, and marine bioacoustics. Acoustic Conferences InterNoise NoiseCon Forum Acousticum SAE Noise and Vibration Conference and Exhibition Professional societies The Acoustical Society of America (ASA) Australian Acoustical Society (AAS) The European Acoustics Association (EAA) Institute of Electrical and Electronics Engineers (IEEE) Institute of Acoustics (IoA UK) The Audio Engineering Society (AES) American Society of Mechanical Engineers, Noise Control and Acoustics Division (ASME-NCAD) International Commission for Acoustics (ICA) American Institute of Aeronautics and Astronautics, Aeroacoustics (AIAA) International Computer Music Association (ICMA) Academic journals Acoustics \| An Open Access Journal from MDPI Acoustics Today Acta Acustica united with Acustica Advances in Acoustics and Vibration Applied Acoustics Building Acoustics IEEE Transacions on Ultrasonics, Ferroelectrics, and Frequency Control Journal of the Acoustical Society of America (JASA) Journal of the Acoustical Society of America, Express Letters (JASA-EL) Journal of the Audio Engineering Society Journal of Sound and Vibration (JSV) Journal of Vibration and Acoustics American Society of Mechanical Engineers MDPI Acoustics Noise Control Engineering Journal SAE International Journal of Vehicle Dynamics, Stability and NVH Ultrasonics (journal) Ultrasonics Sonochemistry Wave Motion See also Outline of acoustics Acoustic attenuation Acoustic emission Acoustic engineering Acoustic impedance Acoustic levitation Acoustic location Acoustic phonetics Acoustic streaming Acoustic tags Acoustic thermometry Acoustic wave Audiology Auditory illusion Diffraction Doppler effect Fisheries acoustics Friction acoustics Helioseismology Lamb wave Linear elasticity The Little Red Book of Acoustics (in the UK) Longitudinal wave Musicology Music therapy Noise pollution One-Way Wave Equation Phonon Picosecond ultrasonics Rayleigh wave Shock wave Seismology Sonification Sonochemistry Soundproofing Soundscape Sonic boom Sonoluminescence Surface acoustic wave Thermoacoustics Transverse wave Wave equation References Further reading External links International Commission for Acoustics European Acoustics Association Acoustical Society of America Institute of Noise Control Engineers National Council of Acoustical Consultants Institute of Acoustic in UK Australian Acoustical Society (AAS) Sound	18
American Sign Language (ASL) is a natural language that serves as the predominant sign language of Deaf communities in the United States of America and most of Anglophone Canada. ASL is a complete and organized visual language that is expressed by employing both manual and nonmanual features. Besides North America, dialects of ASL and ASL-based creoles are used in many countries around the world, including much of West Africa and parts of Southeast Asia. ASL is also widely learned as a second language, serving as a lingua franca. ASL is most closely related to French Sign Language (LSF). It has been proposed that ASL is a creole language of LSF, although ASL shows features atypical of creole languages, such as agglutinative morphology. ASL originated in the early 19th century in the American School for the Deaf (ASD) in Hartford, Connecticut, from a situation of language contact. Since then, ASL use has been propagated widely by schools for the deaf and Deaf community organizations. Despite its wide use, no accurate count of ASL users has been taken. Reliable estimates for American ASL users range from 250,000 to 500,000 persons, including a number of children of deaf adults and other hearing individuals. ASL signs have a number of phonemic components, such as movement of the face, the torso, and the hands. ASL is not a form of pantomime although iconicity plays a larger role in ASL than in spoken languages. English loan words are often borrowed through fingerspelling, although ASL grammar is unrelated to that of English. ASL has verbal agreement and aspectual marking and has a productive system of forming agglutinative classifiers. Many linguists believe ASL to be a subject–verb–object language. However, there are several alternative proposals to account for ASL word order. Classification ASL emerged as a language in the American School for the Deaf (ASD), founded by Thomas Gallaudet in 1817, which brought together Old French Sign Language, various village sign languages, and home sign systems. ASL was created in that situation by language contact. ASL was influenced by its forerunners but distinct from all of them. The influence of French Sign Language (LSF) on ASL is readily apparent; for example, it has been found that about 58% of signs in modern ASL are cognate to Old French Sign Language signs. However, that is far less than the standard 80% measure used to determine whether related languages are actually dialects. That suggests that nascent ASL was highly affected by the other signing systems brought by the ASD students although the school's original director, Laurent Clerc, taught in LSF. In fact, Clerc reported that he often learned the students' signs rather than conveying LSF: It has been proposed that ASL is a creole in which LSF is the superstrate language and the native village sign languages are substrate languages. However, more recent research has shown that modern ASL does not share many of the structural features that characterize creole languages. ASL may have begun as a creole and then undergone structural change over time, but it is also possible that it was never a creole-type language. There are modality-specific reasons that sign languages tend towards agglutination, such as the ability to simultaneously convey information via the face, head, torso, and other body parts. That might override creole characteristics such as the tendency towards isolating morphology. Additionally, Clerc and Thomas Hopkins Gallaudet may have used an artificially constructed form of manually coded language in instruction rather than true LSF. Although the United States, the United Kingdom, and Australia share English as a common oral and written language, ASL is not mutually intelligible with either British Sign Language (BSL) or Auslan. All three languages show degrees of borrowing from English, but that alone is not sufficient for cross-language comprehension. It has been found that a relatively high percentage (37–44%) of ASL signs have similar translations in Auslan, which for oral languages would suggest that they belong to the same language family. However, that does not seem justified historically for ASL and Auslan, and it is likely that the resemblance is caused by the higher degree of iconicity in sign languages in general as well as contact with English. American Sign Language is growing in popularity in many states. Many high school and university students desire to take it as a foreign language, but until recently, it was usually not considered a creditable foreign language elective. ASL users, however, have a very distinct culture, and they interact very differently when they talk. Their facial expressions and hand movements reflect what they are communicating. They also have their own sentence structure, which sets the language apart. American Sign Language is now being accepted by many colleges as a language eligible for foreign language course credit; many states are making it mandatory to accept it as such. In some states however, this is only true with regard to high school coursework. History Prior to the birth of ASL, sign language had been used by various communities in the United States. In the United States, as elsewhere in the world, hearing families with deaf children have historically employed ad hoc home sign, which often reaches much higher levels of sophistication than gestures used by hearing people in spoken conversation. As early as 1541 at first contact by Francisco Vásquez de Coronado, there were reports that the Indigenous peoples of the Great Plains widely spoke a sign language to communicate across vast national and linguistic lines. In the 19th century, a "triangle" of village sign languages developed in New England: one in Martha's Vineyard, Massachusetts; one in Henniker, New Hampshire, and one in Sandy River Valley, Maine. Martha's Vineyard Sign Language (MVSL), which was particularly important for the history of ASL, was used mainly in Chilmark, Massachusetts. Due to intermarriage in the original community of English settlers of the 1690s, and the recessive nature of genetic deafness, Chilmark had a high 4% rate of genetic deafness. MVSL was used even by hearing residents whenever a deaf person was present, and also in some situations where spoken language would be ineffective or inappropriate, such as during church sermons or between boats at sea. ASL is thought to have originated in the American School for the Deaf (ASD), founded in Hartford, Connecticut, in 1817. Originally known as The American Asylum, At Hartford, For The Education And Instruction Of The Deaf And Dumb, the school was founded by the Yale graduate and divinity student Thomas Hopkins Gallaudet. Gallaudet, inspired by his success in demonstrating the learning abilities of a young deaf girl Alice Cogswell, traveled to Europe in order to learn deaf pedagogy from European institutions. Ultimately, Gallaudet chose to adopt the methods of the French Institut National de Jeunes Sourds de Paris, and convinced Laurent Clerc, an assistant to the school's founder Charles-Michel de l'Épée, to accompany him back to the United States. Upon his return, Gallaudet founded the ASD on April 15, 1817. The largest group of students during the first seven decades of the school were from Martha's Vineyard, and they brought MVSL with them. There were also 44 students from around Henniker, New Hampshire, and 27 from the Sandy River valley in Maine, each of which had their own village sign language. Other students brought knowledge of their own home signs. Laurent Clerc, the first teacher at ASD, taught using French Sign Language (LSF), which itself had developed in the Parisian school for the deaf established in 1755. From that situation of language contact, a new language emerged, now known as ASL. More schools for the deaf were founded after ASD, and knowledge of ASL spread to those schools. In addition, the rise of Deaf community organizations bolstered the continued use of ASL. Societies such as the National Association of the Deaf and the National Fraternal Society of the Deaf held national conventions that attracted signers from across the country. All of that contributed to ASL's wide use over a large geographical area, atypical of a sign language. While oralism, an approach to educating deaf students focusing on oral language, had previously been used in American schools, the Milan Congress made it dominant and effectively banned the use of sign languages at schools in the United States and Europe. However, the efforts of Deaf advocates and educators, more lenient enforcement of the Congress's mandate, and the use of ASL in religious education and proselytism ensured greater use and documentation compared to European sign languages, albeit more influenced by fingerspelled loanwords and borrowed idioms from English as students were societally pressured to achieve fluency in spoken language. Nevertheless, oralism remained the predominant method of deaf education up to the 1950s. Linguists did not consider sign language to be true "language" but as something inferior. Recognition of the legitimacy of ASL was achieved by William Stokoe, a linguist who arrived at Gallaudet University in 1955 when that was still the dominant assumption. Aided by the Civil Rights Movement of the 1960s, Stokoe argued for manualism, the use of sign language in deaf education. Stokoe noted that sign language shares the important features that oral languages have as a means of communication, and even devised a transcription system for ASL. In doing so, Stokoe revolutionized both deaf education and linguistics. In the 1960s, ASL was sometimes referred to as "Ameslan", but that term is now considered obsolete. Population Counting the number of ASL signers is difficult because ASL users have never been counted by the American census. The ultimate source for current estimates of the number of ASL users in the United States is a report for the National Census of the Deaf Population (NCDP) by Schein and Delk (1974). Based on a 1972 survey of the NCDP, Schein and Delk provided estimates consistent with a signing population between 250,000 and 500,000. The survey did not distinguish between ASL and other forms of signing; in fact, the name "ASL" was not yet in widespread use. Incorrect figures are sometimes cited for the population of ASL users in the United States based on misunderstandings of known statistics. Demographics of the deaf population have been confused with those of ASL use since adults who become deaf late in life rarely use ASL in the home. That accounts for currently-cited estimations that are greater than 500,000; such mistaken estimations can reach as high as 15,000,000. A 100,000-person lower bound has been cited for ASL users; the source of that figure is unclear, but it may be an estimate of prelingual deafness, which is correlated with but not equivalent to signing. ASL is sometimes incorrectly cited as the third- or fourth-most-spoken language in the United States. Those figures misquote Schein and Delk (1974), who actually concluded that ASL speakers constituted the third-largest population "requiring an interpreter in court". Although that would make ASL the third-most used language among monolinguals other than English, it does not imply that it is the fourth-most-spoken language in the United States since speakers of other languages may also speak English. Geographic distribution ASL is used throughout Anglo-America. That contrasts with Europe, where a variety of sign languages are used within the same continent. The unique situation of ASL seems to have been caused by the proliferation of ASL through schools influenced by the American School for the Deaf, wherein ASL originated, and the rise of community organizations for the Deaf. Throughout West Africa, ASL-based sign languages are signed by educated Deaf adults. Such languages, imported by boarding schools, are often considered by associations to be the official sign languages of their countries and are named accordingly, such as Nigerian Sign Language, Ghanaian Sign Language. Such signing systems are found in Benin, Burkina Faso, Ivory Coast, Ghana, Liberia, Mauritania, Mali, Nigeria, and Togo. Due to lack of data, it is still an open question how similar those sign languages are to the variety of ASL used in America. In addition to the aforementioned West African countries, ASL is reported to be used as a first language in Barbados, Bolivia, Cambodia (alongside Cambodian Sign Language), the Central African Republic, Chad, China (Hong Kong), the Democratic Republic of the Congo, Gabon, Jamaica, Kenya, Madagascar, the Philippines, Singapore, and Zimbabwe. ASL is also used as a lingua franca throughout the deaf world, widely learned as a second language. Regional variation Sign production Sign production can often vary according to location. Signers from the South tend to sign with more flow and ease. Native signers from New York have been reported as signing comparatively quicker and sharper. Sign production of native Californian signers has also been reported as being fast. Research on that phenomenon often concludes that the fast-paced production for signers from the coasts could be due to the fast-paced nature of living in large metropolitan areas. That conclusion also supports how the ease with which Southern sign could be caused by the easygoing environment of the South in comparison to that of the coasts. Sign production can also vary depending on age and native language. For example, sign production of letters may vary in older signers. Slight differences in finger spelling production can be a signal of age. Additionally, signers who learned American Sign Language as a second language vary in production. For Deaf signers who learned a different sign language before learning American Sign Language, qualities of their native language may show in their ASL production. Some examples of that varied production include fingerspelling towards the body, instead of away from it, and signing certain movement from bottom to top, instead of top to bottom. Hearing people who learn American Sign Language also have noticeable differences in signing production. The most notable production difference of hearing people learning American Sign Language is their rhythm and arm posture. Sign variants Most popularly, there are variants of the signs for English words such as "birthday", "pizza", "Halloween", "early", and "soon", just a sample of the most commonly recognized signs with variants based on regional change. The sign for "school" is commonly varied between black and white signers; the variants used by black signers are sometimes called Black American Sign Language. Social variation is also found between citation forms and forms used by Deaf gay men for words such as "pain" and "protest". History and implications The prevalence of residential Deaf schools can account for much of the regional variance of signs and sign productions across the United States. Deaf schools often serve students of the state in which the school resides. That limited access to signers from other regions, combined with the residential quality of Deaf Schools promoted specific use of certain sign variants. Native signers did not have much access to signers from other regions during the beginning years of their education. It is hypothesized that because of that seclusion, certain variants of a sign prevailed over others due to the choice of variant used by the student of the school/signers in the community. However, American Sign Language does not appear to be vastly varied in comparison to other signed languages. That is because when Deaf education was beginning in the United States, many educators flocked to the American School for the Deaf in Hartford, Connecticut, whose central location for the first generation of educators in Deaf education to learn American Sign Language allows ASL to be more standardized than its variant. Varieties Varieties of ASL are found throughout the world. There is little difficulty in comprehension among the varieties of the United States and Canada. Mutual intelligibility among those ASL varieties is high, and the variation is primarily lexical. For example, there are three different words for English about in Canadian ASL; the standard way, and two regional variations (Atlantic and Ontario). Variation may also be phonological, meaning that the same sign may be signed in a different way depending on the region. For example, an extremely common type of variation is between the handshapes /1/, /L/, and /5/ in signs with one handshape. There is also a distinct variety of ASL used by the Black Deaf community. Black ASL evolved as a result of racially segregated schools in some states, which included the residential schools for the deaf. Black ASL differs from standard ASL in vocabulary, phonology, and some grammatical structure. While African American English (AAE) is generally viewed as more innovating than standard English, Black ASL is more conservative than standard ASL, preserving older forms of many signs. Black sign language speakers use more two-handed signs than in mainstream ASL, are less likely to show assimilatory lowering of signs produced on the forehead (e.g. KNOW) and use a wider signing space. Modern Black ASL borrows a number of idioms from AAE; for instance, the AAE idiom "I feel you" is calqued into Black ASL. ASL is used internationally as a lingua franca, and a number of closely related sign languages derived from ASL are used in many different countries. Even so, there have been varying degrees of divergence from standard ASL in those imported ASL varieties. Bolivian Sign Language is reported to be a dialect of ASL, no more divergent than other acknowledged dialects. On the other hand, it is also known that some imported ASL varieties have diverged to the extent of being separate languages. For example, Malaysian Sign Language, which has ASL origins, is no longer mutually comprehensible with ASL and must be considered its own language. For some imported ASL varieties, such as those used in West Africa, it is still an open question how similar they are to American ASL. When communicating with hearing English speakers, ASL-speakers often use what is commonly called Pidgin Signed English (PSE) or 'contact signing', a blend of English structure with ASL vocabulary. Various types of PSE exist, ranging from highly English-influenced PSE (practically relexified English) to PSE which is quite close to ASL lexically and grammatically, but may alter some subtle features of ASL grammar. Fingerspelling may be used more often in PSE than it is normally used in ASL. There have been some constructed sign languages, known as Manually Coded English (MCE), which match English grammar exactly and simply replace spoken words with signs; those systems are not considered to be varieties of ASL. Tactile ASL (TASL) is a variety of ASL used throughout the United States by and with the deaf-blind. It is particularly common among those with Usher's syndrome. It results in deafness from birth followed by loss of vision later in life; consequently, those with Usher's syndrome often grow up in the Deaf community using ASL, and later transition to TASL. TASL differs from ASL in that signs are produced by touching the palms, and there are some grammatical differences from standard ASL in order to compensate for the lack of nonmanual signing. ASL changes over time and from generation to generation. The sign for telephone has changed as the shape of phones and the manner of holding them have changed. The development of telephones with screens has also changed ASL, encouraging the use of signs that can be seen on small screens. Stigma In 2013, the White House published a response to a petition that gained over 37,000 signatures to officially recognize American Sign Language as a community language and a language of instruction in schools. The response is titled "there shouldn't be any stigma about American Sign Language" and addressed that ASL is a vital language for the Deaf and hard of hearing. Stigmas associated with sign languages and the use of sign for educating children often lead to the absence of sign during periods in children's lives when they can access languages most effectively. Scholars such as Beth S. Benedict advocate not only for bilingualism (using ASL and English training) but also for early childhood intervention for children who are deaf. York University psychologist Ellen Bialystok has also campaigned for bilingualism, arguing that those who are bilingual acquire cognitive skills that may help to prevent dementia later in life. Most children born to deaf parents are hearing. Known as CODAs ("Children Of Deaf Adults"), they are often more culturally Deaf than deaf children, most of whom are born to hearing parents. Unlike many deaf children, CODAs acquire ASL as well as Deaf cultural values and behaviors from birth. Such bilingual hearing children may be mistakenly labeled as being "slow learners" or as having "language difficulties" because of preferential attitudes towards spoken language. Writing systems Although there is no well-established writing system for ASL, written sign language dates back almost two centuries. The first systematic writing system for a sign language seems to be that of Roch-Ambroise Auguste Bébian, developed in 1825. However, written sign language remained marginal among the public. In the 1960s, linguist William Stokoe created Stokoe notation specifically for ASL. It is alphabetic, with a letter or diacritic for every phonemic (distinctive) hand shape, orientation, motion, and position, though it lacks any representation of facial expression, and is better suited for individual words than for extended passages of text. Stokoe used that system for his 1965 A Dictionary of American Sign Language on Linguistic Principles. SignWriting, proposed in 1974 by Valerie Sutton, is the first writing system to gain use among the public and the first writing system for sign languages to be included in the Unicode Standard. SignWriting consists of more than 5000 distinct iconic graphs/glyphs. Currently, it is in use in many schools for the Deaf, particularly in Brazil, and has been used in International Sign forums with speakers and researchers in more than 40 countries, including Brazil, Ethiopia, France, Germany, Italy, Portugal, Saudi Arabia, Slovenia, Tunisia, and the United States. Sutton SignWriting has both a printed and an electronically produced form so that persons can use the system anywhere that oral languages are written (personal letters, newspapers, and media, academic research). The systematic examination of the International Sign Writing Alphabet (ISWA) as an equivalent usage structure to the International Phonetic Alphabet for spoken languages has been proposed. According to some researchers, SignWriting is not a phonemic orthography and does not have a one-to-one map from phonological forms to written forms. That assertion has been disputed, and the process for each country to look at the ISWA and create a phonemic/morphemic assignment of features of each sign language was proposed by researchers Msc. Roberto Cesar Reis da Costa and Madson Barreto in a thesis forum on June 23, 2014. The SignWriting community has an open project on Wikimedia Labs to support the various Wikimedia projects on Wikimedia Incubator and elsewhere involving SignWriting. The ASL Wikipedia request was marked as eligible in 2008 and the test ASL Wikipedia has 50 articles written in ASL using SignWriting. The most widely used transcription system among academics is HamNoSys, developed at the University of Hamburg. Based on Stokoe Notation, HamNoSys was expanded to about 200 graphs in order to allow transcription of any sign language. Phonological features are usually indicated with single symbols, though the group of features that make up a handshape is indicated collectively with a symbol. Several additional candidates for written ASL have appeared over the years, including SignFont, ASL-phabet, and Si5s. For English-speaking audiences, ASL is often glossed using English words. Such glosses are typically all-capitalized and are arranged in ASL order. For example, the ASL sentence DOG NOW CHASE>IX=3 CAT, meaning "the dog is chasing the cat", uses NOW to mark ASL progressive aspect and shows ASL verbal inflection for the third person (>IX=3). However, glossing is not used to write the language for speakers of ASL. Phonology Each sign in ASL is composed of a number of distinctive components, generally referred to as parameters. A sign may use one hand or both. All signs can be described using the five parameters involved in signed languages, which are handshape, movement, palm orientation, location and nonmanual markers. Just as phonemes of sound distinguish meaning in spoken languages, those parameters are the phonemes that distinguish meaning in signed languages like ASL. Changing any one of them may change the meaning of a sign, as illustrated by the ASL signs THINK and DISAPPOINTED: There are also meaningful nonmanual signals in ASL, which may include movement of the eyebrows, the cheeks, the nose, the head, the torso, and the eyes. William Stokoe proposed that such components are analogous to the phonemes of spoken languages. There has also been a proposal that they are analogous to classes like place and manner of articulation. As in spoken languages, those phonological units can be split into distinctive features. For instance, the handshapes /2/ and /3/ are distinguished by the presence or absence of the feature [± closed thumb], as illustrated to the right. ASL has processes of allophony and phonotactic restrictions. There is ongoing research into whether ASL has an analog of syllables in spoken language. Grammar Morphology ASL has a rich system of verbal inflection, which involves both grammatical aspect: how the action of verbs flows in time—and agreement marking. Aspect can be marked by changing the manner of movement of the verb; for example, continuous aspect is marked by incorporating rhythmic, circular movement, while punctual aspect is achieved by modifying the sign so that it has a stationary hand position. Verbs may agree with both the subject and the object, and are marked for number and reciprocity. Reciprocity is indicated by using two one-handed signs; for example, the sign SHOOT, made with an L-shaped handshape with inward movement of the thumb, inflects to SHOOT[reciprocal], articulated by having two L-shaped hands "shooting" at each other. ASL has a productive system of classifiers, which are used to classify objects and their movement in space. For example, a rabbit running downhill would use a classifier consisting of a bent V classifier handshape with a downhill-directed path; if the rabbit is hopping, the path is executed with a bouncy manner. In general, classifiers are composed of a "classifier handshape" bound to a "movement root". The classifier handshape represents the object as a whole, incorporating such attributes as surface, depth, and shape, and is usually very iconic. The movement root consists of a path, a direction and a manner. In linguistics, there are two primary ways of changing the form of a word: derivation and inflection. Derivation involves creating new words by adding something to an existing word, while inflection involves changing the form of a word to convey grammatical information without altering its fundamental meaning or category. For example, adding the suffix "-ship" to the noun "friend" creates the new word "friendship", which has a different meaning than the original word. Inflection, on the other hand, involves modifying a word's form to indicate grammatical features such as tense, number, gender, person, case, and degree of comparison. In American Sign Language (ASL), inflection is conveyed through facial expressions, body movements, and other non-manual markers. For instance, to indicate past tense in ASL, one might sign the present tense of a verb (such as "walk"), and then add a facial expression and head tilt to signify that the action occurred in the past (i.e., "walked"). While inflection does not change the basic meaning or category of a word, it does provide additional information that helps us better understand how the word is being used in a sentence. This is similar to how subtitles in a movie provide additional information without altering the content of the film itself. According to the book Linguistics of American Sign Language, ASL signs have two main components: hold segments and movement segments. Hold segments consist of hand-shape, location, orientation, and non-manual features, while movement segments possess similar features. Morphology is the study of how languages form words by using smaller units to construct larger units. The smallest meaningful unit in a language is known as a "morpheme", with some morphemes able to stand alone as independent units (free morphemes), while others must occur with other morphemes (bound morphemes). For example, the plural "-s" and third person "-s" in English are bound morphemes. In ASL, the 3 handshape in signs like THREE-WEEKS and THREE-MONTHS are also bound morphemes. Affixes, which are morphemes added to words to create new words or modify their meanings, are part of the derivational process. For example, in English, prefixes like "re-" and suffixes like "-able" are affixes. In ASL, affixation can be used to modify the sign for CHAIR to indicate different types of chairs. The inflectional process, on the other hand, adds grammatical information to existing units. By studying morphemes and how they can be combined or modified, linguists gain insight into the underlying structure of language and the creative ways in which it can be used to express meaning. Understanding morphology is essential to understanding how languages are built and how new signs or words can be formed. Furthermore, understanding morphology has practical applications in language learning and teaching. For example, teaching students the basic morphological structures of a language can help them to better understand the language's grammar and syntax, and can also aid in their acquisition of new vocabulary. In summary, morphology is an essential component of language and provides valuable insights into the structure and function of languages. By understanding the morphological processes involved in language formation, we can gain a deeper understanding of how languages work and how they can be effectively taught and learned. Fingerspelling ASL possesses a set of 26 signs known as the American manual alphabet, which can be used to spell out words from the English language. Such signs make use of the 19 handshapes of ASL. For example, the signs for 'p' and 'k' use the same handshape but different orientations. A common misconception is that ASL consists only of fingerspelling; although such a method (Rochester Method) has been used, it is not ASL. Fingerspelling is a form of borrowing, a linguistic process wherein words from one language are incorporated into another. In ASL, fingerspelling is used for proper nouns and for technical terms with no native ASL equivalent. There are also some other loan words which are fingerspelled, either very short English words or abbreviations of longer English words, e.g. O-N from English 'on', and A-P-T from English 'apartment'. Fingerspelling may also be used to emphasize a word that would normally be signed otherwise. Syntax ASL is a subject–verb–object (SVO) language, but various phenomena affect that basic word order. Basic SVO sentences are signed without any pauses: However, other word orders may also occur since ASL allows the topic of a sentence to be moved to sentence-initial position, a phenomenon known as topicalization. In object–subject–verb (OSV) sentences, the object is topicalized, marked by a forward head-tilt and a pause: Besides, word orders can be obtained through the phenomenon of subject copy in which the subject is repeated at the end of the sentence, accompanied by head nodding for clarification or emphasis: ASL also allows null subject sentences whose subject is implied, rather than stated explicitly. Subjects can be copied even in a null subject sentence, and the subject is then omitted from its original position, yielding a verb–object–subject (VOS) construction: Topicalization, accompanied with a null subject and a subject copy, can produce yet another word order, object–verb–subject (OVS). Those properties of ASL allow it a variety of word orders, leading many to question which is the true, underlying, "basic" order. There are several other proposals that attempt to account for the flexibility of word order in ASL. One proposal is that languages like ASL are best described with a topic–comment structure whose words are ordered by their importance in the sentence, rather than by their syntactic properties. Another hypothesis is that ASL exhibits free word order, in which syntax is not encoded in word order but can be encoded by other means such as head nods, eyebrow movement, and body position. Iconicity Common misconceptions are that signs are iconically self-explanatory, that they are a transparent imitation of what they mean, or even that they are pantomime. In fact, many signs bear no resemblance to their referent because they were originally arbitrary symbols, or their iconicity has been obscured over time. Even so, in ASL iconicity plays a significant role; a high percentage of signs resemble their referents in some way. That may be because the medium of sign, three-dimensional space, naturally allows more iconicity than oral language. In the era of the influential linguist Ferdinand de Saussure, it was assumed that the mapping between form and meaning in language must be completely arbitrary. Although onomatopoeia is a clear exception, since words like 'choo-choo' bear clear resemblance to the sounds that they mimic, the Saussurean approach was to treat them as marginal exceptions. ASL, with its significant inventory of iconic signs, directly challenges that theory. Research on acquisition of pronouns in ASL has shown that children do not always take advantage of the iconic properties of signs when they interpret their meaning. It has been found that when children acquire the pronoun "you", the iconicity of the point (at the child) is often confused, being treated more like a name. That is a similar finding to research in oral languages on pronoun acquisition. It has also been found that iconicity of signs does not affect immediate memory and recall; less iconic signs are remembered just as well as highly-iconic signs. See also American Sign Language grammar American Sign Language literature Baby sign language Bimodal bilingualism Great ape language, of which ASL has been one attempted mode Legal recognition of sign languages Pointing Sign name ASL interpreting Notes References Bibliography External links Accessible American Sign Language vocabulary site American Sign Language discussion forum One-stop resource American Sign Language and video dictionary National Institute of Deafness ASL section National Association of the Deaf ASL information American Sign Language The American Sign Language Linguistics Research Project Video Dictionary of ASL American Sign Language Dictionary American Sign Language family Articles containing video clips Deaf culture in the United States French Sign Language family Fusional languages Languages of Barbados Languages of Belize Languages of Botswana Languages of Burundi Sign languages of Canada Languages of Grenada Languages of Guyana Languages of Haiti Languages of Saint Kitts and Nevis Languages of Saint Vincent and the Grenadines Languages of the United States Virgin Islands Sign languages of the United States Languages of Zimbabwe Subject–verb–object languages 1817 introductions Languages attested from the 19th century Languages of Canada Languages of the United States	6
In computing, an applet is any small application that performs one specific task that runs within the scope of a dedicated widget engine or a larger program, often as a plug-in. The term is frequently used to refer to a Java applet, a program written in the Java programming language that is designed to be placed on a web page. Applets are typical examples of transient and auxiliary applications that do not monopolize the user's attention. Applets are not full-featured application programs, and are intended to be easily accessible. History The word applet was first used in 1990 in PC Magazine. However, the concept of an applet, or more broadly a small interpreted program downloaded and executed by the user, dates at least to RFC 5 (1969) by Jeff Rulifson, which described the Decode-Encode Language, which was designed to allow remote use of the oN-Line System over ARPANET, by downloading small programs to enhance the interaction. This has been specifically credited as a forerunner of Java's downloadable programs in RFC 2555. Applet as an extension of other software In some cases, an applet does not run independently. These applets must run either in a container provided by a host program, through a plugin, or a variety of other applications including mobile devices that support the applet programming model. Web-based applets Applets were used to provide interactive features to web applications that historically could not be provided by HTML alone. They could capture mouse input and also had controls like buttons or check boxes. In response to the user action, an applet could change the provided graphic content. This made applets well suited for demonstration, visualization, and teaching. There were online applet collections for studying various subjects, from physics to heart physiology. Applets were also used to create online game collections that allowed players to compete against live opponents in real-time. An applet could also be a text area only, providing, for instance, a cross-platform command-line interface to some remote system. If needed, an applet could leave the dedicated area and run as a separate window. However, applets had very little control over web page content outside the applet dedicated area, so they were less useful for improving the site appearance in general (while applets like news tickers or WYSIWYG editors are also known). Applets could also play media in formats that are not natively supported by the browser. HTML pages could embed parameters that were passed to the applet. Hence, the same applet could appear differently depending on the parameters that were passed. Examples of Web-based applets include: QuickTime movies Flash movies Windows Media Player applets, used to display embedded video files in Internet Explorer (and other browsers that supported the plugin) 3D modeling display applets, used to rotate and zoom a model Browser games that were applet-based, though some developed into fully functional applications that required installation. Applet Vs. Subroutine A larger application distinguishes its applets through several features: Applets execute only on the "client" platform environment of a system, as contrasted from "Servlet". As such, an applet provides functionality or performance beyond the default capabilities of its container (the browser). The container restricts applets' capabilities. Applets are written in a language different from the scripting or HTML language that invokes it. The applet is written in a compiled language, whereas the scripting language of the container is an interpreted language, hence the greater performance or functionality of the applet. Unlike a subroutine, a complete web component can be implemented as an applet. Java applets A Java applet is a Java program that is launched from HTML and run in a web browser. It takes code from server and run in a web browser. It can provide web applications with interactive features that cannot be provided by HTML. Since Java's bytecode is platform-independent, Java applets can be executed by browsers running under many platforms, including Windows, Unix, macOS, and Linux. When a Java technology-enabled web browser processes a page that contains an applet, the applet's code is transferred to the client's system and executed by the browser's Java virtual machine. An HTML page references an applet either via the deprecated tag or via its replacement, the tag. Security Recent developments in the coding of applications, including mobile and embedded systems, have led to the awareness of the security of applets. Open platform applets Applets in an open platform environment should provide secure interactions between different applications. A compositional approach can be used to provide security for open platform applets. Advanced compositional verification methods have been developed for secure applet interactions. Java applets A Java applet contains different security models: unsigned Java applet security, signed Java applet security, and self-signed Java applet security. Web-based applets In an applet-enabled web browser, many methods can be used to provide applet security for malicious applets. A malicious applet can infect a computer system in many ways, including denial of service, invasion of privacy, and annoyance. A typical solution for malicious applets is to make the web browser to monitor applets' activities. This will result in a web browser that will enable the manual or automatic stopping of malicious applets. See also Application posture Bookmarklet Java applet Widget engine Abstract Window Toolkit References External links Technology neologisms Component-based software engineering Java (programming language) libraries	5
Alternate history is a subgenre of speculative fiction in which one or more historical events have occurred but are resolved differently than in actual history. As conjecture based upon historical fact, alternate history stories propose What if? scenarios about crucial events in human history, and present outcomes very different from the historical record. Some alternate histories are considered a subgenre of literary fiction, science fiction, or historical fiction. Since the 1950s, as a subgenre of science fiction, alternative history stories feature the tropes of time travel between histories, the psychic awareness of the existence of an alternative universe, by the inhabitants of a given universe; and time travel that divides history into various timestreams. Terminology Other terms include alternative history, allohistory, althist, or AH. Definition Often described as a subgenre of science fiction, alternative history is a genre of fiction wherein the author speculates upon how the course of history might have been altered if a particular historical event had an outcome different from the real life outcome. An alternate history requires three conditions: (i) A point of divergence from the historical record, before the time in which the author is writing; (ii) A change that would alter known history; and (iii) An examination of the ramifications of that alteration to history. Occasionally, some types of genre fiction are misidentified as alternative history, specifically science fiction stories set in a time that was the future for the writer, but now is the past for the reader, such as the novels 2001: A Space Odyssey (1968), by Arthur C. Clarke and Nineteen Eighty-Four (1949), by George Orwell, because the authors did not alter the history of the past when they wrote the stories. Some alternative history stories feature the tropes of time travel between histories, and the psychic awareness of the existence of an alternative universe, by the inhabitants of a given universe; and time travel that divides history into various timestreams. Similar to the genre of Alternative History, there is also the genre of the Secret History of an event, which can be either fictional or non-fictional, documents events that might have occurred in history, but which had no effect upon the recorded historical outcome. Alternative history also is thematically related to, but distinct from, Counterfactual History, which is a form of historiography that attempts to answer the What if? speculations that arise from counterfactual conditions in order to understand what did happen. As a method of historical research, counterfactual history explores historical events with an extrapolated timeline in which key historical events either did not occur or had an outcome different from the historical record. History of literature Antiquity and medieval The earliest example of alternate (or counterfactual) history is found in Livy's Ab Urbe Condita Libri (book IX, sections 17–19). Livy contemplated an alternative 4th century BC in which Alexander the Great had survived to attack Europe as he had planned; asking, "What would have been the results for Rome if she had been engaged in a war with Alexander?" Livy concluded that the Romans would likely have defeated Alexander. An even earlier possibility is Herodotus's Histories, which contains speculative material. Another example of counterfactual history was posited by cardinal and Doctor of the Church Peter Damian in the 11th century. In his famous work De Divina Omnipotentia, a long letter in which he discusses God's omnipotence, he treats questions related to the limits of divine power, including the question of whether God can change the past, for example, bringing about that Rome was never founded:I see I must respond finally to what many people, on the basis of your holiness's [own] judgment, raise as an objection on the topic of this dispute. For they say: If, as you assert, God is omnipotent in all things, can he manage this, that things that have been made were not made? He can certainly destroy all things that have been made, so that they do not exist now. But it cannot be seen how he can bring it about that things that have been made were not made. To be sure, it can come about that from now on and hereafter Rome does not exist; for it can be destroyed. But no opinion can grasp how it can come about that it was not founded long ago...One early work of fiction detailing an alternate history is Joanot Martorell's 1490 epic romance Tirant lo Blanch, which was written when the fall of Constantinople to the Turks was still a recent and traumatic memory for Christian Europe. It tells the story of the knight Tirant the White from Brittany who travels to the embattled remnants of the Byzantine Empire. He becomes a Megaduke and commander of its armies and manages to fight off the invading Ottoman armies of . He saves the city from Islamic conquest, and even chases the Turks deeper into lands they had previously conquered. 19th century One of the earliest works of alternate history published in large quantities for the reception of a large audience may be Louis Geoffroy's Histoire de la Monarchie universelle : Napoléon et la conquête du monde (1812–1832) (History of the Universal Monarchy: Napoleon and the Conquest of the World) (1836), which imagines Napoleon's First French Empire emerging victorious in the French invasion of Russia in 1812 and in an invasion of England in 1814, later unifying the world under Bonaparte's rule. The Book of Mormon (published 1830) is described as an "alternative history" by Richard Lyman Bushman, a biographer of Joseph Smith. Smith claimed to have translated the document from golden plates, which told the story of a Jewish group who migrated from Israel to Americas and inhabited the region from about 600 B.C. and 400 A.D., becoming the ancestors of Native Americans. In the 2005 biography Joseph Smith: Rough Stone Rolling, Bushman wrote that the Book of Mormon "turned American history upside down [and] works on the premise that a history—a book—can reconstitute a nation. It assumes that by giving a nation an alternative history, alternative values can be made to grow." In the English language, the first known complete alternate history may be Nathaniel Hawthorne's short story "P.'s Correspondence", published in 1845. It recounts the tale of a man who is considered "a madman" due to his perceptions of a different 1845, a reality in which long-dead famous people, such as the poets Robert Burns, Lord Byron, Percy Bysshe Shelley and John Keats, the actor Edmund Kean, the British politician George Canning, and Napoleon Bonaparte, are still alive. The first novel-length alternate history in English would seem to be Castello Holford's Aristopia (1895). While not as nationalistic as Louis Geoffroy's Napoléon et la conquête du monde, 1812–1823, Aristopia is another attempt to portray a Utopian society. In Aristopia, the earliest settlers in Virginia discover a reef made of solid gold and are able to build a Utopian society in North America. Early 20th century and the era of the pulps In 1905, H. G. Wells published A Modern Utopia. As explicitly noted in the book itself, Wells's main aim in writing it was to set out his social and political ideas, the plot serving mainly as a vehicle to expound them. This book introduced the idea of a person being transported from a point in our familiar world to the precise geographical equivalent point in an alternate world in which history had gone differently. The protagonists undergo various adventures in the alternate world, and then are finally transported back to our world, again to the precise geographical equivalent point. Since then, that has become a staple of the alternate history genre. A number of alternate history stories and novels appeared in the late 19th and early 20th centuries (see, for example, Joseph Edgar Chamberlin's The Ifs of History [1907] and Charles Petrie's If: A Jacobite Fantasy [1926]). In 1931, British historian Sir John Squire collected a series of essays from some of the leading historians of the period for his anthology If It Had Happened Otherwise. In that work, scholars from major universities, as well as important non-academic authors, turned their attention to such questions as "If the Moors in Spain Had Won" and "If Louis XVI Had Had an Atom of Firmness". The essays range from serious scholarly efforts to Hendrik Willem van Loon's fanciful and satiric portrayal of an independent 20th-century New Amsterdam, a Dutch city-state on the island of Manhattan. Among the authors included were Hilaire Belloc, André Maurois, and Winston Churchill. One of the entries in Squire's volume was Churchill's "If Lee Had Not Won the Battle of Gettysburg", written from the viewpoint of a historian in a world in which the Confederacy had won the American Civil War. The entry considers what would have happened if the North had been victorious (in other words, a character from an alternate world imagines a world more like the real one we live in, although it is not identical in every detail). Speculative work that narrates from the point of view of an alternate history is variously known as "recursive alternate history", a "double-blind what-if", or an "alternate-alternate history". Churchill's essay was one of the influences behind Ward Moore's alternate history novel Bring the Jubilee in which General Robert E. Lee won the Battle of Gettysburg and paved the way for the eventual victory of the Confederacy in the American Civil War (named the "War of Southron Independence" in this timeline). The protagonist, the autodidact Hodgins Backmaker, travels back to the aforementioned battle and inadvertently changes history, which results in the emergence of our own timeline and the consequent victory of the Union instead. The American humorist author James Thurber parodied alternate history stories about the American Civil War in his 1930 story "If Grant Had Been Drinking at Appomattox", which he accompanied with this very brief introduction: "Scribner's magazine is publishing a series of three articles: 'If Booth Had Missed Lincoln', 'If Lee Had Won the Battle of Gettysburg', and 'If Napoleon Had Escaped to America'. This is the fourth". Another example of alternate history from this period (and arguably the first that explicitly posited cross-time travel from one universe to another as anything more than a visionary experience) is H.G. Wells' Men Like Gods (1923) in which the London-based journalist Mr. Barnstable, along with two cars and their passengers, is mysteriously teleported into "another world", which the "Earthlings" call Utopia. Being far more advanced than Earth, Utopia is some 3000 years ahead of humanity in its development. Wells describes a multiverse of alternative worlds, complete with the paratime travel machines that would later become popular with American pulp writers. However, since his hero experiences only a single alternate world, the story is not very different from conventional alternate history. In the 1930s, alternate history moved into a new arena. The December 1933 issue of Astounding published Nat Schachner's "Ancestral Voices", which was quickly followed by Murray Leinster's "Sidewise in Time". While earlier alternate histories examined reasonably-straightforward divergences, Leinster attempted something completely different. In his "World gone mad", pieces of Earth traded places with their analogs from different timelines. The story follows Professor Minott and his students from a fictitious Robinson College as they wander through analogues of worlds that followed a different history. A somewhat similar approach was taken by Robert A. Heinlein in his 1941 novelette Elsewhen in which a professor trains his mind to move his body across timelines. He then hypnotizes his students so that they can explore more of them. Eventually, each settles into the reality that is most suitable for him or her. Some of the worlds they visit are mundane, some are very odd, and others follow science fiction or fantasy conventions. World War II produced alternate history for propaganda: both British and American authors wrote works depicting Nazi invasions of their respective countries as cautionary tales. Time travel to create historical divergences The period around World War II also saw the publication of the time travel novel Lest Darkness Fall by L. Sprague de Camp in which an American academic travels to Italy at the time of the Byzantine invasion of the Ostrogoths. De Camp's time traveler, Martin Padway, is depicted as making permanent historical changes and implicitly forming a new time branch, thereby making the work an alternate history. In William Tenn's short story Brooklyn Project (1948), a tyrannical US Government brushes aside the warnings of scientists about the dangers of time travel and goes on with a planned experiment - with the result that minor changes to the prehistoric past cause Humanity to never have existed, its place taken by tentacled underwater intelligent creatures - who also have a tyrannical government which also insists on experimenting with time-travel. Time travel as the cause of a point of divergence (POD), which can denote either the bifurcation of a historical timeline or a simple replacement of the future that existed before the time-travelling event, has continued to be a popular theme. In Ward Moore's Bring the Jubilee, the protagonist lives in an alternate history in which the Confederacy has won the American Civil War. He travels backward through time and brings about a Union victory at the Battle of Gettysburg. When a story's assumptions about the nature of time travel lead to the complete replacement of the visited time's future, rather than just the creation of an additional time line, the device of a "time patrol" is often used where guardians move through time to preserve the "correct" history. A more recent example is Making History by Stephen Fry in which a time machine is used to alter history so that Adolf Hitler was never born. That ironically results in a more competent leader of Nazi Germany and results in the country's ascendancy and longevity in the altered timeline. Cross-time stories H.G. Wells' "cross-time" or "many universes" variant (see above) was fully developed by Murray Leinster in his 1934 short story "Sidewise in Time", in which sections of the Earth's surface begin changing places with their counterparts in alternate timelines. Fredric Brown employed this subgenre to satirize the science fiction pulps and their adolescent readers—and fears of foreign invasion—in the classic What Mad Universe (1949). In Clifford D. Simak's Ring Around the Sun (1953), the hero ends up in an alternate earth of thick forests in which humanity never developed but a band of mutants is establishing a colony; the story line appears to frame the author's anxieties regarding McCarthyism and the Cold War. Quantum theory of many worlds While many justifications for alternate histories involve a multiverse, the "many world" theory would naturally involve many worlds, in fact a continually exploding array of universes. In quantum theory, new worlds would proliferate with every quantum event, and even if the writer uses human decisions, every decision that could be made differently would result in a different timeline. A writer's fictional multiverse may, in fact, preclude some decisions as humanly impossible, as when, in Night Watch, Terry Pratchett depicts a character informing Vimes that while anything that can happen, has happened, nevertheless there is no history whatsoever in which Vimes has ever murdered his wife. When the writer explicitly maintains that all possible decisions are made in all possible ways, one possible conclusion is that the characters were neither brave, nor clever, nor skilled, but simply lucky enough to happen on the universe in which they did not choose the cowardly route, take the stupid action, fumble the crucial activity, etc.; few writers focus on this idea, although it has been explored in stories such as Larry Niven's story All the Myriad Ways, where the reality of all possible universes leads to an epidemic of suicide and crime because people conclude their choices have no moral import. In any case, even if it is true that every possible outcome occurs in some world, it can still be argued that traits such as bravery and intelligence might still affect the relative frequency of worlds in which better or worse outcomes occurred (even if the total number of worlds with each type of outcome is infinite, it is still possible to assign a different measure to different infinite sets). The physicist David Deutsch, a strong advocate of the many-worlds interpretation of quantum mechanics, has argued along these lines, saying that "By making good choices, doing the right thing, we thicken the stack of universes in which versions of us live reasonable lives. When you succeed, all the copies of you who made the same decision succeed too. What you do for the better increases the portion of the multiverse where good things happen." This view is perhaps somewhat too abstract to be explored directly in science fiction stories, but a few writers have tried, such as Greg Egan in his short story The Infinite Assassin, where an agent is trying to contain reality-scrambling "whirlpools" that form around users of a certain drug, and the agent is constantly trying to maximize the consistency of behavior among his alternate selves, attempting to compensate for events and thoughts he experiences, he guesses are of low measure relative to those experienced by most of his other selves. Many writers—perhaps the majority—avoid the discussion entirely. In one novel of this type, H. Beam Piper's Lord Kalvan of Otherwhen, a Pennsylvania State Police officer, who knows how to make gunpowder, is transported from our world to an alternate universe where the recipe for gunpowder is a tightly held secret and saves a country that is about to be conquered by its neighbors. The paratime patrol members are warned against going into the timelines immediately surrounding it, where the country will be overrun, but the book never depicts the slaughter of the innocent thus entailed, remaining solely in the timeline where the country is saved. The cross-time theme was further developed in the 1960s by Keith Laumer in the first three volumes of his Imperium sequence, which would be completed in Zone Yellow (1990). Piper's politically more sophisticated variant was adopted and adapted by Michael Kurland and Jack Chalker in the 1980s; Chalker's G.O.D. Inc trilogy (1987–89), featuring paratime detectives Sam and Brandy Horowitz, marks the first attempt at merging the paratime thriller with the police procedural. Kurland's Perchance (1988), the first volume of the never-completed "Chronicles of Elsewhen", presents a multiverse of secretive cross-time societies that utilize a variety of means for cross-time travel, ranging from high-tech capsules to mutant powers. Harry Turtledove has launched the Crosstime Traffic series for teenagers featuring a variant of H. Beam Piper's paratime trading empire. Rival paratime worlds The concept of a cross-time version of a world war, involving rival paratime empires, was developed in Fritz Leiber's Change War series, starting with the Hugo Award winning The Big Time (1958); followed by Richard C. Meredith's Timeliner trilogy in the 1970s, Michael McCollum's A Greater Infinity (1982) and John Barnes' Timeline Wars trilogy in the 1990s. Such "paratime" stories may include speculation that the laws of nature can vary from one universe to the next, providing a science fictional explanation—or veneer—for what is normally fantasy. Aaron Allston's Doc Sidhe and Sidhe Devil take place between our world, the "grim world" and an alternate "fair world" where the Sidhe retreated to. Although technology is clearly present in both worlds, and the "fair world" parallels our history, about fifty years out of step, there is functional magic in the fair world. Even with such explanation, the more explicitly the alternate world resembles a normal fantasy world, the more likely the story is to be labelled fantasy, as in Poul Anderson's "House Rule" and "Loser's Night". In both science fiction and fantasy, whether a given parallel universe is an alternate history may not be clear. The writer might allude to a POD only to explain the existence and make no use of the concept, or may present the universe without explanation of its existence. Major writers explore alternate histories Isaac Asimov's short story "What If—" (1952) is about a couple who can explore alternate realities by means of a television-like device. This idea can also be found in Asimov's novel The End of Eternity (1955), in which the "Eternals" can change the realities of the world, without people being aware of it. Poul Anderson's Time Patrol stories feature conflicts between forces intent on changing history and the Patrol who work to preserve it. One story, Delenda Est, describes a world in which Carthage triumphed over the Roman Republic. The Big Time, by Fritz Leiber, describes a Change War ranging across all of history. Keith Laumer's Worlds of the Imperium is one of the earliest alternate history novels; it was published by Fantastic Stories of the Imagination in 1961, in magazine form, and reprinted by Ace Books in 1962 as one half of an Ace Double. Besides our world, Laumer describes a world ruled by an Imperial aristocracy formed by the merger of European empires, in which the American Revolution never happened, and a third world in post-war chaos ruled by the protagonist's doppelganger. Philip K. Dick's novel, The Man in the High Castle (1962), is an alternate history in which Nazi Germany and Imperial Japan won World War II. This book contains an example of "alternate-alternate" history, in that one of its characters authored a book depicting a reality in which the Allies won the war, itself divergent from real-world history in several aspects. The several characters live within a divided United States, in which the Empire of Japan takes the Pacific states, governing them as a puppet, Nazi Germany takes the East Coast of the United States and parts of the Midwest, with the remnants of the old United States' government as the Neutral Zone, a buffer state between the two superpowers. The book has inspired an Amazon series of the same name. Vladimir Nabokov's novel, Ada or Ardor: A Family Chronicle (1969), is a story of incest that takes place within an alternate North America settled in part by Czarist Russia and that borrows from Dick's idea of "alternate-alternate" history (the world of Nabokov's hero is wracked by rumors of a "counter-earth" that apparently is ours). Some critics believe that the references to a counter-earth suggest that the world portrayed in Ada is a delusion in the mind of the hero (another favorite theme of Dick's novels). Strikingly, the characters in Ada seem to acknowledge their own world as the copy or negative version, calling it "Anti-Terra", while its mythical twin is the real "Terra". Like history, science has followed a divergent path on Anti-Terra: it boasts all the same technology as our world, but all based on water instead of electricity; e.g., when a character in Ada makes a long-distance call, all the toilets in the house flush at once to provide hydraulic power. Guido Morselli described the defeat of Italy (and subsequently France) in World War I in his novel, Past Conditional (1975; ), wherein the static Alpine front line which divided Italy from Austria during that war collapses when the Germans and the Austrians forsake trench warfare and adopt blitzkrieg twenty years in advance. Kingsley Amis set his novel, The Alteration (1976), in the 20th century, but major events in the Reformation did not take place, and Protestantism is limited to the breakaway Republic of New England. Martin Luther was reconciled to the Roman Catholic Church and later became Pope Germanian I. In Nick Hancock and Chris England's 1997 book What Didn't Happen Next: An Alternative History of Football it is suggested that, had Gordon Banks been fit to play in the 1970 FIFA World Cup quarter-final, there would have been no Thatcherism and the post-war consensus would have continued indefinitely. Kim Stanley Robinson's novel, The Years of Rice and Salt (2002), starts at the point of divergence with Timur turning his army away from Europe, and the Black Death has killed 99% of Europe's population, instead of only a third. Robinson explores world history from that point in AD 1405 (807 AH) to about AD 2045 (1467 AH). Rather than following the great man theory of history, focusing on leaders, wars, and major events, Robinson writes more about social history, similar to the Annales School of history theory and Marxist historiography, focusing on the lives of ordinary people living in their time and place. Philip Roth's novel, The Plot Against America (2004), looks at an America where Franklin D. Roosevelt is defeated in 1940 in his bid for a third term as President of the United States, and Charles Lindbergh is elected, leading to a US that features increasing fascism and anti-Semitism. Michael Chabon, occasionally an author of speculative fiction, contributed to the genre with his novel The Yiddish Policemen's Union (2007), which explores a world in which the State of Israel was destroyed in its infancy and many of the world's Jews instead live in a small strip of Alaska set aside by the US government for Jewish settlement. The story follows a Jewish detective solving a murder case in the Yiddish-speaking semi-autonomous city state of Sitka. Stylistically, Chabon borrows heavily from the noir and detective fiction genres, while exploring social issues related to Jewish history and culture. Apart from the alternate history of the Jews and Israel, Chabon also plays with other common tropes of alternate history fiction; in the book, Germany actually loses the war even harder than they did in reality, getting hit with a nuclear bomb instead of just simply losing a ground war (subverting the common "what if Germany won WWII?" trope). Contemporary alternate history in popular literature The late 1980s and the 1990s saw a boom in popular-fiction versions of alternate history, fueled by the emergence of the prolific alternate history author Harry Turtledove, as well as the development of the steampunk genre and two series of anthologies—the What Might Have Been series edited by Gregory Benford and the Alternate ... series edited by Mike Resnick. This period also saw alternate history works by S. M. Stirling, Kim Stanley Robinson, Harry Harrison, Howard Waldrop, Peter Tieryas, and others. In 1986, a sixteen-part epic comic book series called Captain Confederacy began examining a world where the Confederate States of America won the American Civil War. In the series, the Captain and others heroes are staged government propaganda events featuring the feats of these superheroes. Since the late 1990s, Harry Turtledove has been the most prolific practitioner of alternate history and has been given the title "Master of Alternate History" by some. His books include those of Timeline 191 (a.k.a. Southern Victory, also known as TL-191), in which, while the Confederate States of America won the American Civil War, the Union and Imperial Germany defeat the Entente Powers in the two "Great War"s of the 1910s and 1940s (with a Nazi-esque Confederate government attempting to exterminate its Black population), and the Worldwar series, in which aliens invaded Earth during World War II. Other stories by Turtledove include A Different Flesh, in which America was not colonized from Asia during the last ice age; In the Presence of Mine Enemies, in which the Nazis won World War II; and Ruled Britannia, in which the Spanish Armada succeeded in conquering England in the Elizabethan era, with William Shakespeare being given the task of writing the play that will motivate the Britons to rise up against their Spanish conquerors. He also co-authored a book with actor Richard Dreyfuss, The Two Georges, in which the United Kingdom retained the American colonies, with George Washington and King George III making peace. He did a two-volume series in which the Japanese not only bombed Pearl Harbor but also invaded and occupied the Hawaiian Islands. Perhaps the most incessantly explored theme in popular alternate history focuses on worlds in which the Nazis won World War Two. In some versions, the Nazis and/or Axis Powers win; or in others, they conquer most of the world but a "Fortress America" exists under siege; while in others, there is a Nazi/Japanese Cold War comparable to the US/Soviet equivalent in 'our' timeline. Fatherland (1992), by Robert Harris, is set in Europe following the Nazi victory. The novel Dominion by C.J. Sansom (2012) is similar in concept but is set in England, with Churchill the leader of an anti-German Resistance and other historic persons in various fictional roles. In the Mecha Samurai Empire series (2016), Peter Tieryas focuses on the Asian-American side of the alternate history, exploring an America ruled by the Japanese Empire while integrating elements of Asian pop culture like mechas and videogames. Several writers have posited points of departure for such a world but then have injected time splitters from the future. For instance James P. Hogan's The Proteus Operation. Norman Spinrad wrote The Iron Dream in 1972, which is intended to be a science fiction novel written by Adolf Hitler after fleeing from Europe to North America in the 1920s. In Jo Walton's "Small Change" series, the United Kingdom made peace with Hitler before the involvement of the United States in World War II, and slowly collapses due to severe economic depression. Former House Speaker Newt Gingrich and William R. Forstchen have written a novel, 1945, in which the US defeated Japan but not Germany in World War II, resulting in a Cold War with Germany rather than the Soviet Union. Gingrich and Forstchen neglected to write the promised sequel; instead, they wrote a trilogy about the American Civil War, starting with Gettysburg: A Novel of the Civil War, in which the Confederates win a victory at the Battle of Gettysburg - however, after Lincoln responds by bringing Grant and his forces to the eastern theater, the Army of Northern Virginia is soon trapped and destroyed in Maryland, and the war ends within weeks. While World War II has been a common Point of Divergence in alternate history literature, several works have been based on other points of divergence. For example, Martin Cruz Smith, in his first novel, posited an independent American Indian nation following the defeat of Custer in The Indians Won (1970). Beginning with The Probability Broach in 1980, L. Neil Smith wrote several novels that postulated the disintegration of the US Federal Government after Albert Gallatin joins the Whiskey Rebellion in 1794 and eventually leads to the creation of a libertarian utopia. In the 2022 novel Poutine and Gin by Steve Rhinelander, the point of divergence is the Battle of the Plains of Abraham of the French and Indian War. That novel is a mystery set in 1940 of that time line. A recent time traveling splitter variant involves entire communities being shifted elsewhere to become the unwitting creators of new time branches. These communities are transported from the present (or the near-future) to the past or to another time-line via a natural disaster, the action of technologically advanced aliens, or a human experiment gone wrong. S. M. Stirling wrote the Island in the Sea of Time trilogy, in which Nantucket Island and all its modern inhabitants are transported to Bronze Age times to become the world's first superpower. In Eric Flint's 1632 series, a small town in West Virginia is transported to 17th century central Europe and drastically changes the course of the Thirty Years' War, which was then underway. John Birmingham's Axis of Time trilogy deals with the culture shock when a United Nations naval task force from 2021 finds itself back in 1942 helping the Allies against the Empire of Japan and the Germans (and doing almost as much harm as good in spite of its advanced weapons). The series also explores the cultural impacts of people with 2021 ideals interacting with 1940s culture. Similarly, Robert Charles Wilson's Mysterium depicts a failed US government experiment which transports a small American town into an alternative version of the US run by believers in a form of Christianity known as Gnosticism, who are engaged in a bitter war with the "Spanish" in Mexico (the chief scientist at the laboratory where the experiment occurred is described as a Gnostic, and references to Christian Gnosticism appear repeatedly in the book). Although not dealing in physical time travel, in his alt-history novel Marx Returns, Jason Barker introduces anachronisms into the life and times of Karl Marx, such as when his wife Jenny sings a verse from the Sex Pistols's song "Anarchy in the U.K.", or in the games of chess she plays with the Marxes' housekeeper Helene Demuth, which on one occasion involves a Caro–Kann Defence. In her review of the novel, Nina Power writes of "Jenny's 'utopian' desire for an end to time", an attitude which, according to Power, is inspired by her husband's co-authored book The German Ideology. However, in keeping with the novel's anachronisms, the latter was not published until 1932. By contrast, the novel's timeline ends in 1871. In the 2022 novel Hydrogen Wars: Atomic Sunrise by R.M. Christianson a small change in post-war Japanese history leads to the election of General Douglas MacArthur as President of the United States. This minor change ultimately leads to all-out atomic war between the major Cold War powers. Through crowdfunding on Kickstarter, Alan Jenkins and Gan Golan produced a graphic novel series called 1/6 depicting a dystopian alternate reality in which the January 6 United States Capitol attack was successful. What follows is the burning down of the Capitol building and the hanging of Vice President Mike Pence. Under Donald Trump's second term as President, a solid gold statue of him is erected and armed thugs patrol the streets of Washington DC suppressing civilian resistance with brutal violence under the banner of the Confederate flag. In fantasy genre Many works of straight fantasy and science fantasy take place in historical settings, though with the addition of, for example, magic or mythological beasts. Some present a secret history in which the modern day world no longer believes that these elements ever existed. Many ambiguous alternate/secret histories are set in Renaissance or pre-Renaissance times, and may explicitly include a "retreat" from the world, which would explain the current absence of such phenomena. Other stories make plan a divergence of some kind. In Poul Anderson's Three Hearts and Three Lions in which the Matter of France is history and the fairy folk are real and powerful. The same author's A Midsummer Tempest occurs in a world in which the plays of William Shakespeare (called here "the Great Historian"), presented the literal truth in every instance. The novel itself takes place in the era of Oliver Cromwell and Charles I. Here, the English Civil War had a different outcome, and the Industrial Revolution has occurred early. Randall Garrett's "Lord Darcy" series presents a point of divergence: a monk systemizes magic rather than science, so the use of foxglove to treat heart disease is regarded as superstition. Another point of divergence occurs in 1199, when Richard the Lionheart survives the Siege of Chaluz and returns to England and makes the Angevin Empire so strong that it survives into the 20th century. Jonathan Strange & Mr Norrell by Susanna Clarke takes place in an England where a separate Kingdom ruled by the Raven King and founded on magic existed in Northumbria for over 300 years. In Patricia Wrede's Regency fantasies, Great Britain has a Royal Society of Wizards. The Tales of Alvin Maker series by Orson Scott Card (a parallel to the life of Joseph Smith, founder of the Latter Day Saint movement) takes place in an alternate America, beginning in the early 19th century. Prior to that time, a POD occurred: England, under the rule of Oliver Cromwell, had banished "makers", or anyone else demonstrating "knacks" (an ability to perform seemingly supernatural feats) to the North American continent. Thus the early American colonists embraced as perfectly ordinary these gifts, and counted on them as a part of their daily lives. The political division of the continent is considerably altered, with two large English colonies bookending a smaller "American" nation, one aligned with England, and the other governed by exiled Cavaliers. Actual historical figures are seen in a much different light: Ben Franklin is revered as the continent's finest "maker", George Washington was executed after being captured, and "Tom" Jefferson is the first president of "Appalachia", the result of a compromise between the Continentals and the British Crown. On the other hand, when the "Old Ones" (fairies) still manifest themselves in England in Keith Roberts's Pavane, which takes place in a technologically backward world after a Spanish assassination of Elizabeth I allowed the Spanish Armada to conquer England, the possibility that the fairies were real but retreated from modern advances makes the POD possible: the fairies really were present all along, in a secret history. Again, in the English Renaissance fantasy Armor of Light by Melissa Scott and Lisa A. Barnett, the magic used in the book, by Dr. John Dee and others, actually was practiced in the Renaissance; positing a secret history of effective magic makes this an alternate history with a point of departure. Sir Philip Sidney survives the Battle of Zutphen in 1586, and shortly thereafter saving the life of Christopher Marlowe. When the magical version of our world's history is set in contemporary times, the distinction becomes clear between alternate history on the one hand and contemporary fantasy, using in effect a form of secret history (as when Josepha Sherman's Son of Darkness has an elf living in New York City, in disguise) on the other. In works such as Robert A. Heinlein's Magic, Incorporated where a construction company can use magic to rig up stands at a sporting event and Poul Anderson's Operation Chaos and its sequel Operation Luna, where djinns are serious weapons of war—with atomic bombs—the use of magic throughout the United States and other modern countries makes it clear that this is not secret history—although references in Operation Chaos to degaussing the effects of cold iron make it possible that it is the result of a POD. The sequel clarifies this as the result of a collaboration of Einstein and Planck in 1901, resulting in the theory of "rhea tics". Henry Moseley applies this theory to "degauss the effects of cold iron and release the goetic forces." This results in the suppression of ferromagnetism and the re-emergence of magic and magical creatures. Alternate history shades off into other fantasy subgenres when the use of actual, though altered, history and geography decreases, although a culture may still be clearly the original source; Barry Hughart's Bridge of Birds and its sequels take place in a fantasy world, albeit one clearly based on China, and with allusions to actual Chinese history, such as the Empress Wu. Richard Garfinkle's Celestial Matters incorporates ancient Chinese physics and Greek Aristotelian physics, using them as if factual. Alternate history has long been a staple of Japanese speculative fiction with such authors as Futaro Yamada and Ryō Hanmura writing novels set in recognizable historical settings with added supernatural or science fiction elements. Ryō Hanmura's 1973 Musubi no Yama Hiroku which recreated 400 years of Japan's history from the perspective of a secret magical family with psychic abilities. The novel has since come to be recognized as a masterpiece of Japanese speculative fiction. Twelve years later, author Hiroshi Aramata wrote the groundbreaking Teito Monogatari which reimagined the history of Tokyo across the 20th century in a world heavily influenced by the supernatural. Television 1983 is set on a world where the Iron Curtain never fell and the Cold War continues until the present (2003). An Englishman's Castle tells the story of the writer of a soap opera in a 1970s England which lost World War II. England is run by a collaborator government which strains to maintain a normal appearance of British life. Slowly, however, the writer begins to uncover the truth. In the Community episode "Remedial Chaos Theory," each of the six members of the study group rolls a die to decide who has to go downstairs to accept a pizza delivery for the group, creating 6 different alternative worlds. Characters from the worst universe, "darkest timeline," would later appear in the "prime universe". Confederate was a planned HBO series set on a world where the south won the US Civil War. Social media backlash during pre-production led to the series being cancelled with no episodes produced. Counterpart tells of a United Nations agency that is responsible for monitoring passage between alternative worlds. Two of the worlds, Alpha and Prime are locked in a cold war. The Court-Martial of George Armstrong Custer is a 1977 telemovie where George Custer survives the Battle of Little Bighorn and faces a court martial hearing over his incompetence. C.S.A.: The Confederate States of America presents itself as a British TV documentary uncovering some of the dark secrets of the Confederacy on a world where the south won the US Civil War. Dark Skies tells that much of history having been shaped since the 1940s by a government conspiracy with aliens. One race of aliens can take over humans, while those immune to the alien's control fight back. Doctor Who'''s main character has visited two alternative worlds in the TV show and several in its spin off media. The Third Doctor visits a world with a fascist Great Britain on the brink of destruction, Inferno while the Tenth Doctor visits a Britain that has a President and blimps are a common form of transportation beset by Cybermen, "Doomsday". The Seventh Doctor faces a threat from an alternative world in Battlefield, where magic is real and the alternative version of The Doctor is hinted to be that reality's Merlin.Fallout shows a 1950s retro-future world that suffers a global nuclear war on the Amazon streaming service.Fatherland is a TV movie set in a 1960 alternative world where US President Joseph Kennedy and Adolf Hitler have agreed to meet to discuss an end to their country's Cold War 15 years after the Axis victory in World War II. However, an American reporter has discovered proof of the long denied Final Solution threatens the meeting. The anime Fena: Pirate Princess featured an alternate 18th century.For All Mankind depicts an alternate timeline in which the Soviet crewed lunar program successfully lands on the Moon before the US Apollo program, resulting in a continued and intensified Space Race. It also includes many historic deviants - including Michael Jordan drafted by Portland Trail Blazers, instead of Chicago Bulls. In the TV show Fringe the father of one of the main characters crosses into another reality to steal that world's version of his son after his son dies. The second world has a slightly different history, with a few different states in the United States, such as only one Carolina and Upper Michigan as a state. In addition, the 9/11 attack didn't take down the Twin Towers but the White House. Also, several major DC Comics events are different, such as Superman not Supergirl dying during Crisis on Infinite Earths. The incursion to steal the son has many negative effects on that world, and while the realities start out as antagonist, they eventually work together to repair the damage. The TV show The Man in the High Castle is an adaptation of the novel with the same name that ran for four seasons showing a world where the Axis Powers won World War II.Motherland: Fort Salem explores a female-dominated world in which witchcraft is real. Its world diverged from our timeline when the Salem witch trials are resolved by an agreement between witches and ungifted humans.Noughts + Crosses is a British TV show set on a world where a powerful West African empire colonizes Europe 700 years before the start of the series. Parallels was a planned TV show whose pilot was later released as a Netflix movie. The plot concerns a building which can shift realities every 36 hours and those who use the building to travel to other realities.The Plot Against America is an HBO miniseries where Charles Lindbergh wins the 1940 US Presidential election as an anti-war candidate who moves the country toward fascism. The TV show Sliders explores different possible alternate realities by having the protagonist "slide" into different parallel dimensions of the same planet Earth.SS-GB (TV series) shows a world where the Axis Powers quickly win World War II, killing Churchill and installing a puppet government. However, British resistance fights back. In the various Star Trek TV shows and spin off media a Mirror Universe has been encountered where Earth has an empire that subjugates other planets. Doppelgängers of the main cast of many the TV shows appear in that reality. The Watchmen series is set on a world where costumed heroes were initially welcomed but later outlawed. It is set 34 years after the events of the comic book on which the series shares a name.Loki on streaming service Disney+ shows an agency which prevents alterations to the time line. Alternative versions of Loki from various realities appear.What If...? is a streaming series on Disney+. Each episode shows what would have happened if events featured in the MCU film universe happened differently. Online Fans of alternate history have made use of the internet from a very early point to showcase their own works and provide useful tools for those fans searching for anything alternate history, first in mailing lists and usenet groups, later in web databases and forums. The "Usenet Alternate History List" was first posted on 11 April 1991, to the Usenet newsgroup rec.arts.sf-lovers. In May 1995, the dedicated newsgroup soc.history.what-if was created for showcasing and discussing alternate histories. Its prominence declined with the general migration from unmoderated usenet to moderated web forums, most prominently AlternateHistory.com, the self-described "largest gathering of alternate history fans on the internet" with over 10,000 active members. In addition to these discussion forums, in 1997 Uchronia: The Alternate History List was created as an online repository, now containing over 2,900 alternate history novels, stories, essays, and other printed materials in several different languages. Uchronia was selected as the Sci Fi Channel's "Sci Fi Site of the Week" twice. Uchronia In Spanish, French, German, Portuguese, Italian, Catalan, and Galician, the words , , and are native versions of alternate history, from which comes the English loanword uchronia. The English term uchronia is a neologism that is sometimes used in its original meaning as a straightforward synonym for alternate history,Loyer, Emmanuelle (2019). Uchronia. Booksandideas.net.Schmid, Helga (2020). Uchronia: Designing Time. Germany: Walter de Gruyter GmbH. p. 26 for example applied to alternate histories like Philip K. Dick's The Man in the High Castle and Philip Roth's The Plot Against America. However, it may also now refer to other concepts, namely an umbrella genre of fiction that encompasses alternate history, parallel universes in fiction, and fiction based in futuristic or non-temporal settings.Craveiro, Joanna (2016). A live/living museum of small, forgotten and unwanted memories: performing narratives, testimonies and archives of the Portuguese Dictatorship and Revolution (Doctoral dissertation, University of Roehampton), p. 46. See also 20th century in science fiction Alien space bats Alternate ending Alternative future American Civil War alternate histories Dieselpunk Dystopian Fictional universe Future history The Garden of Forking Paths Historical revisionism Hypothetical Axis victory in World War II Invasion literature Jonbar hinge List of alternate history fiction Possible worlds Pulp novels Ruritanian romance References Further reading Chapman, Edgar L., and Carl B. Yoke (eds.). Classic and Iconoclastic Alternate History Science Fiction. Mellen, 2003. Collins, William Joseph. Paths Not Taken: The Development, Structure, and Aesthetics of the Alternative History. University of California at Davis 1990. Darius, Julian. "58 Varieties: Watchmen and Revisionism". In Minutes to Midnight: Twelve Essays on Watchmen. Sequart Research & Literacy Organization, 2010. Focuses on Watchmen as alternate history. Cowley, Robert, ed., What If? Military Historians Imagine What Might Have Been. Pan Books, 1999. Gevers, Nicholas. Mirrors of the Past: Versions of History in Science Fiction and Fantasy. University of Cape Town, 1997 Hellekson, Karen. The Alternate History: Refiguring Historical Time. Kent State University Press, 2001 Keen, Antony G. "Alternate Histories of the Roman Empire in Stephen Baxter, Robert Silverberg and Sophia McDougall". Foundation: The International Review of Science Fiction 102, Spring 2008. McKnight, Edgar Vernon, Jr. Alternative History: The Development of a Literary Genre. University of North Carolina at Chapel Hill, 1994. Morgan, Glyn, and C. Palmer-Patel (eds.). Sideways in Time: Critical Essays on Alternate History Fiction. Liverpool University Press, 2019. Nedelkovh, Aleksandar B. British and American Science Fiction Novel 1950–1980 with the Theme of Alternative History (an Axiological Approach). 1994 , 1999 . Rosenfeld, Gavriel David. The World Hitler Never Made: Alternate History and the Memory of Nazism. 2005 Rosenfeld, Gavriel David. "Why Do We Ask 'What If?' Reflections on the Function of Alternate History." History and Theory 41, Theme Issue 41: Unconventional History (December 2002), 90–103. . Schneider-Mayerson, Matthew. "What Almost Was: The Politics of the Contemporary Alternate History Novel". American Studies 30, 3–4 (Summer 2009), 63–83. Singles, Kathleen. Alternate History: Playing with Contingency and Necessity''. De Gruyter, 2013. External links Alternate History on TV Tropes Historical novels subgenres	6
In atomic theory and quantum mechanics, an atomic orbital () is a function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus. The term atomic orbital may also refer to the physical region or space where the electron can be calculated to be present, as predicted by the particular mathematical form of the orbital. Each orbital in an atom is characterized by a set of values of the three quantum numbers , , and , which respectively correspond to the electron's energy, its angular momentum, and an angular momentum vector component (magnetic quantum number). As an alternative to the magnetic quantum number, the orbitals are often labeled by the associated harmonic polynomials (e.g., xy, ). Each such orbital can be occupied by a maximum of two electrons, each with its own projection of spin . The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number and respectively. These names, together with the value of , are used to describe the electron configurations of atoms. They are derived from the description by early spectroscopists of certain series of alkali metal spectroscopic lines as sharp, principal, diffuse, and fundamental. Orbitals for > 3 continue alphabetically (g, h, i, k, ...), omitting j because some languages do not distinguish between the letters "i" and "j". Atomic orbitals are the basic building blocks of the atomic orbital model (or electron cloud or wave mechanics model), a modern framework for visualizing the submicroscopic behavior of electrons in matter. In this model the electron cloud of an atom may be seen as being built up (in approximation) in an electron configuration that is a product of simpler hydrogen-like atomic orbitals. The repeating periodicity of blocks of 2, 6, 10, and 14 elements within sections of the periodic table arises naturally from the total number of electrons that occupy a complete set of s, p, d, and f orbitals, respectively, though for higher values of quantum number , particularly when the atom bears a positive charge, the energies of certain sub-shells become very similar and so the order in which they are said to be populated by electrons (e.g., Cr = [Ar]4s13d5 and Cr2+ = [Ar]3d4) can be rationalized only somewhat arbitrarily. Electron properties With the development of quantum mechanics and experimental findings (such as the two slit diffraction of electrons), it was found that the electrons orbiting a nucleus could not be fully described as particles, but needed to be explained by wave–particle duality. In this sense, electrons have the following properties: Wave-like properties: Electrons do not orbit a nucleus in the manner of a planet orbiting the Sun, but instead exist as standing waves. Thus the lowest possible energy an electron can take is similar to the fundamental frequency of a wave on a string. Higher energy states are similar to harmonics of that fundamental frequency. The electrons are never in a single point location, though the probability of interacting with the electron at a single point can be found from the electron's wave function. The electron's charge acts like it is smeared out in space in a continuous distribution, proportional at any point to the squared magnitude of the electron's wave function. Particle-like properties: The number of electrons orbiting a nucleus can be only an integer. Electrons jump between orbitals like particles. For example, if one photon strikes the electrons, only one electron changes state as a result. Electrons retain particle-like properties such as: each wave state has the same electric charge as its electron particle. Each wave state has a single discrete spin (spin up or spin down) depending on its superposition. Thus, electrons cannot be described simply as solid particles. An analogy might be that of a large and often oddly shaped "atmosphere" (the electron), distributed around a relatively tiny planet (the nucleus). Atomic orbitals exactly describe the shape of this "atmosphere" only when one electron is present. When more electrons are added, the additional electrons tend to more evenly fill in a volume of space around the nucleus so that the resulting collection ("electron cloud") tends toward a generally spherical zone of probability describing the electron's location, because of the uncertainty principle. Formal quantum mechanical definition Atomic orbitals may be defined more precisely in formal quantum mechanical language. They are approximate solutions to the Schrödinger equation for the electrons bound to the atom by the electric field of the atom's nucleus. Specifically, in quantum mechanics, the state of an atom, i.e., an eigenstate of the atomic Hamiltonian, is approximated by an expansion (see configuration interaction expansion and basis set) into linear combinations of anti-symmetrized products (Slater determinants) of one-electron functions. The spatial components of these one-electron functions are called atomic orbitals. (When one considers also their spin component, one speaks of atomic spin orbitals.) A state is actually a function of the coordinates of all the electrons, so that their motion is correlated, but this is often approximated by this independent-particle model of products of single electron wave functions. (The London dispersion force, for example, depends on the correlations of the motion of the electrons.) In atomic physics, the atomic spectral lines correspond to transitions (quantum leaps) between quantum states of an atom. These states are labeled by a set of quantum numbers summarized in the term symbol and usually associated with particular electron configurations, i.e., by occupation schemes of atomic orbitals (for example, 1s2 2s2 2p6 for the ground state of neon-term symbol: 1S0). This notation means that the corresponding Slater determinants have a clear higher weight in the configuration interaction expansion. The atomic orbital concept is therefore a key concept for visualizing the excitation process associated with a given transition. For example, one can say for a given transition that it corresponds to the excitation of an electron from an occupied orbital to a given unoccupied orbital. Nevertheless, one has to keep in mind that electrons are fermions ruled by the Pauli exclusion principle and cannot be distinguished from each other. Moreover, it sometimes happens that the configuration interaction expansion converges very slowly and that one cannot speak about simple one-determinant wave function at all. This is the case when electron correlation is large. Fundamentally, an atomic orbital is a one-electron wave function, even though many electrons are not in one-electron atoms, and so the one-electron view is an approximation. When thinking about orbitals, we are often given an orbital visualization heavily influenced by the Hartree–Fock approximation, which is one way to reduce the complexities of molecular orbital theory. Types of orbital Atomic orbitals can be the hydrogen-like "orbitals" which are exact solutions to the Schrödinger equation for a hydrogen-like "atom" (i.e., atom with one electron). Alternatively, atomic orbitals refer to functions that depend on the coordinates of one electron (i.e., orbitals) but are used as starting points for approximating wave functions that depend on the simultaneous coordinates of all the electrons in an atom or molecule. The coordinate systems chosen for orbitals are usually spherical coordinates in atoms and Cartesian in polyatomic molecules. The advantage of spherical coordinates here is that an orbital wave function is a product of three factors each dependent on a single coordinate: . The angular factors of atomic orbitals generate s, p, d, etc. functions as real combinations of spherical harmonics (where and are quantum numbers). There are typically three mathematical forms for the radial functions which can be chosen as a starting point for the calculation of the properties of atoms and molecules with many electrons: The hydrogen-like orbitals are derived from the exact solutions of the Schrödinger equation for one electron and a nucleus, for a hydrogen-like atom. The part of the function that depends on distance r from the nucleus has radial nodes and decays as . The Slater-type orbital (STO) is a form without radial nodes but decays from the nucleus as does a hydrogen-like orbital. The form of the Gaussian type orbital (Gaussians) has no radial nodes and decays as . Although hydrogen-like orbitals are still used as pedagogical tools, the advent of computers has made STOs preferable for atoms and diatomic molecules since combinations of STOs can replace the nodes in hydrogen-like orbitals. Gaussians are typically used in molecules with three or more atoms. Although not as accurate by themselves as STOs, combinations of many Gaussians can attain the accuracy of hydrogen-like orbitals. History The term "orbital" was coined by Robert S. Mulliken in 1932 as short for one-electron orbital wave function. Niels Bohr explained around 1913 that electrons might revolve around a compact nucleus with definite angular momentum. Bohr's model was an improvement on the 1911 explanations of Ernest Rutherford, that of the electron moving around a nucleus. Japanese physicist Hantaro Nagaoka published an orbit-based hypothesis for electron behavior as early as 1904. These theories were each built upon new observations starting with simple understanding and becoming more correct and complex. Explaining the behavior of these electron "orbits" was one of the driving forces behind the development of quantum mechanics. Early models With J. J. Thomson's discovery of the electron in 1897, it became clear that atoms were not the smallest building blocks of nature, but were rather composite particles. The newly discovered structure within atoms tempted many to imagine how the atom's constituent parts might interact with each other. Thomson theorized that multiple electrons revolve in orbit-like rings within a positively charged jelly-like substance, and between the electron's discovery and 1909, this "plum pudding model" was the most widely accepted explanation of atomic structure. Shortly after Thomson's discovery, Hantaro Nagaoka predicted a different model for electronic structure. Unlike the plum pudding model, the positive charge in Nagaoka's "Saturnian Model" was concentrated into a central core, pulling the electrons into circular orbits reminiscent of Saturn's rings. Few people took notice of Nagaoka's work at the time, and Nagaoka himself recognized a fundamental defect in the theory even at its conception, namely that a classical charged object cannot sustain orbital motion because it is accelerating and therefore loses energy due to electromagnetic radiation. Nevertheless, the Saturnian model turned out to have more in common with modern theory than any of its contemporaries. Bohr atom In 1909, Ernest Rutherford discovered that the bulk of the atomic mass was tightly condensed into a nucleus, which was also found to be positively charged. It became clear from his analysis in 1911 that the plum pudding model could not explain atomic structure. In 1913, Rutherford's post-doctoral student, Niels Bohr, proposed a new model of the atom, wherein electrons orbited the nucleus with classical periods, but were permitted to have only discrete values of angular momentum, quantized in units ħ. This constraint automatically allowed only certain electron energies. The Bohr model of the atom fixed the problem of energy loss from radiation from a ground state (by declaring that there was no state below this), and more importantly explained the origin of spectral lines. After Bohr's use of Einstein's explanation of the photoelectric effect to relate energy levels in atoms with the wavelength of emitted light, the connection between the structure of electrons in atoms and the emission and absorption spectra of atoms became an increasingly useful tool in the understanding of electrons in atoms. The most prominent feature of emission and absorption spectra (known experimentally since the middle of the 19th century), was that these atomic spectra contained discrete lines. The significance of the Bohr model was that it related the lines in emission and absorption spectra to the energy differences between the orbits that electrons could take around an atom. This was, however, not achieved by Bohr through giving the electrons some kind of wave-like properties, since the idea that electrons could behave as matter waves was not suggested until eleven years later. Still, the Bohr model's use of quantized angular momenta and therefore quantized energy levels was a significant step toward the understanding of electrons in atoms, and also a significant step towards the development of quantum mechanics in suggesting that quantized restraints must account for all discontinuous energy levels and spectra in atoms. With de Broglie's suggestion of the existence of electron matter waves in 1924, and for a short time before the full 1926 Schrödinger equation treatment of hydrogen-like atoms, a Bohr electron "wavelength" could be seen to be a function of its momentum; so a Bohr orbiting electron was seen to orbit in a circle at a multiple of its half-wavelength. The Bohr model for a short time could be seen as a classical model with an additional constraint provided by the 'wavelength' argument. However, this period was immediately superseded by the full three-dimensional wave mechanics of 1926. In our current understanding of physics, the Bohr model is called a semi-classical model because of its quantization of angular momentum, not primarily because of its relationship with electron wavelength, which appeared in hindsight a dozen years after the Bohr model was proposed. The Bohr model was able to explain the emission and absorption spectra of hydrogen. The energies of electrons in the n = 1, 2, 3, etc. states in the Bohr model match those of current physics. However, this did not explain similarities between different atoms, as expressed by the periodic table, such as the fact that helium (two electrons), neon (10 electrons), and argon (18 electrons) exhibit similar chemical inertness. Modern quantum mechanics explains this in terms of electron shells and subshells which can each hold a number of electrons determined by the Pauli exclusion principle. Thus the n = 1 state can hold one or two electrons, while the n = 2 state can hold up to eight electrons in 2s and 2p subshells. In helium, all n = 1 states are fully occupied; the same is true for n = 1 and n = 2 in neon. In argon, the 3s and 3p subshells are similarly fully occupied by eight electrons; quantum mechanics also allows a 3d subshell but this is at higher energy than the 3s and 3p in argon (contrary to the situation for hydrogen) and remains empty. Modern conceptions and connections to the Heisenberg uncertainty principle Immediately after Heisenberg discovered his uncertainty principle, Bohr noted that the existence of any sort of wave packet implies uncertainty in the wave frequency and wavelength, since a spread of frequencies is needed to create the packet itself. In quantum mechanics, where all particle momenta are associated with waves, it is the formation of such a wave packet which localizes the wave, and thus the particle, in space. In states where a quantum mechanical particle is bound, it must be localized as a wave packet, and the existence of the packet and its minimum size implies a spread and minimal value in particle wavelength, and thus also momentum and energy. In quantum mechanics, as a particle is localized to a smaller region in space, the associated compressed wave packet requires a larger and larger range of momenta, and thus larger kinetic energy. Thus the binding energy to contain or trap a particle in a smaller region of space increases without bound as the region of space grows smaller. Particles cannot be restricted to a geometric point in space, since this would require infinite particle momentum. In chemistry, Erwin Schrödinger, Linus Pauling, Mulliken and others noted that the consequence of Heisenberg's relation was that the electron, as a wave packet, could not be considered to have an exact location in its orbital. Max Born suggested that the electron's position needed to be described by a probability distribution which was connected with finding the electron at some point in the wave-function which described its associated wave packet. The new quantum mechanics did not give exact results, but only the probabilities for the occurrence of a variety of possible such results. Heisenberg held that the path of a moving particle has no meaning if we cannot observe it, as we cannot with electrons in an atom. In the quantum picture of Heisenberg, Schrödinger and others, the Bohr atom number n for each orbital became known as an n-sphere in a three-dimensional atom and was pictured as the most probable energy of the probability cloud of the electron's wave packet which surrounded the atom. Orbital names Orbital notation and subshells Orbitals have been given names, which are usually given in the form: where X is the energy level corresponding to the principal quantum number ; type is a lower-case letter denoting the shape or subshell of the orbital, corresponding to the angular momentum quantum number . For example, the orbital 1s (pronounced as the individual numbers and letters: "'one' 'ess'") is the lowest energy level () and has an angular quantum number of , denoted as s. Orbitals with are denoted as p, d and f respectively. The set of orbitals for a given n and is called a subshell, denoted . The superscript y shows the number of electrons in the subshell. For example, the notation 2p4 indicates that the 2p subshell of an atom contains 4 electrons. This subshell has 3 orbitals, each with n = 2 and = 1. X-ray notation There is also another, less common system still used in X-ray science known as X-ray notation, which is a continuation of the notations used before orbital theory was well understood. In this system, the principal quantum number is given a letter associated with it. For , the letters associated with those numbers are K, L, M, N, O, ... respectively. Hydrogen-like orbitals The simplest atomic orbitals are those that are calculated for systems with a single electron, such as the hydrogen atom. An atom of any other element ionized down to a single electron is very similar to hydrogen, and the orbitals take the same form. In the Schrödinger equation for this system of one negative and one positive particle, the atomic orbitals are the eigenstates of the Hamiltonian operator for the energy. They can be obtained analytically, meaning that the resulting orbitals are products of a polynomial series, and exponential and trigonometric functions. (see hydrogen atom). For atoms with two or more electrons, the governing equations can be solved only with the use of methods of iterative approximation. Orbitals of multi-electron atoms are qualitatively similar to those of hydrogen, and in the simplest models, they are taken to have the same form. For more rigorous and precise analysis, numerical approximations must be used. A given (hydrogen-like) atomic orbital is identified by unique values of three quantum numbers: , , and . The rules restricting the values of the quantum numbers, and their energies (see below), explain the electron configuration of the atoms and the periodic table. The stationary states (quantum states) of the hydrogen-like atoms are its atomic orbitals. However, in general, an electron's behavior is not fully described by a single orbital. Electron states are best represented by time-depending "mixtures" (linear combinations) of multiple orbitals. See Linear combination of atomic orbitals molecular orbital method. The quantum number first appeared in the Bohr model where it determines the radius of each circular electron orbit. In modern quantum mechanics however, determines the mean distance of the electron from the nucleus; all electrons with the same value of n lie at the same average distance. For this reason, orbitals with the same value of n are said to comprise a "shell". Orbitals with the same value of n and also the same value of are even more closely related, and are said to comprise a "subshell". Quantum numbers Because of the quantum mechanical nature of the electrons around a nucleus, atomic orbitals can be uniquely defined by a set of integers known as quantum numbers. These quantum numbers occur only in certain combinations of values, and their physical interpretation changes depending on whether real or complex versions of the atomic orbitals are employed. Complex orbitals In physics, the most common orbital descriptions are based on the solutions to the hydrogen atom, where orbitals are given by the product between a radial function and a pure spherical harmonic. The quantum numbers, together with the rules governing their possible values, are as follows: The principal quantum number describes the energy of the electron and is always a positive integer. In fact, it can be any positive integer, but for reasons discussed below, large numbers are seldom encountered. Each atom has, in general, many orbitals associated with each value of n; these orbitals together are sometimes called electron shells. The azimuthal quantum number describes the orbital angular momentum of each electron and is a non-negative integer. Within a shell where is some integer , ranges across all (integer) values satisfying the relation . For instance, the shell has only orbitals with , and the shell has only orbitals with , and . The set of orbitals associated with a particular value of are sometimes collectively called a subshell. The magnetic quantum number, , describes the magnetic moment of an electron in an arbitrary direction, and is also always an integer. Within a subshell where is some integer , ranges thus: . The above results may be summarized in the following table. Each cell represents a subshell, and lists the values of available in that subshell. Empty cells represent subshells that do not exist. Subshells are usually identified by their - and -values. is represented by its numerical value, but is represented by a letter as follows: 0 is represented by 's', 1 by 'p', 2 by 'd', 3 by 'f', and 4 by 'g'. For instance, one may speak of the subshell with and as a '2s subshell'. Each electron also has a spin quantum number, s, which describes the spin of each electron (spin up or spin down). The number s can be + or −. The Pauli exclusion principle states that no two electrons in an atom can have the same values of all four quantum numbers. If there are two electrons in an orbital with given values for three quantum numbers, (, , ), these two electrons must differ in their spin. The above conventions imply a preferred axis (for example, the z direction in Cartesian coordinates), and they also imply a preferred direction along this preferred axis. Otherwise there would be no sense in distinguishing from . As such, the model is most useful when applied to physical systems that share these symmetries. The Stern–Gerlach experimentwhere an atom is exposed to a magnetic fieldprovides one such example. Real orbitals In addition to the complex orbitals described above, it is common, especially in the chemistry literature, to use real atomic orbitals. These real orbitals arise from simple linear combinations of complex orbitals. Using the Condon–Shortley phase convention, real orbitals are related to complex orbitals in the same way that the real spherical harmonics are related to complex spherical harmonics. Letting denote a complex orbital with quantum numbers , , and , the real orbitals may be defined by If , with the radial part of the orbital, this definition is equivalent to where is the real spherical harmonic related to either the real or imaginary part of the complex spherical harmonic . Real spherical harmonics are physically relevant when an atom is embedded in a crystalline solid, in which case there are multiple preferred symmetry axes but no single preferred direction. Real atomic orbitals are also more frequently encountered in introductory chemistry textbooks and shown in common orbital visualizations. In real hydrogen-like orbitals, quantum numbers and have the same interpretation and significance as their complex counterparts, but is no longer a good quantum number (but its absolute value is). Some real orbitals are given specific names beyond the simple designation. Orbitals with quantum number equal to are called orbitals. With this one can already assign names to complex orbitals such as ; the first symbol is the quantum number, the second character is the symbol for that particular quantum number and the subscript is the quantum number. As an example of how the full orbital names are generated for real orbitals, one may calculate . From the table of spherical harmonics, with . Then Likewise . As a more complicated example: In all these cases we generate a Cartesian label for the orbital by examining, and abbreviating, the polynomial in , , and appearing in the numerator. We ignore any terms in the polynomial except for the term with the highest exponent in . We then use the abbreviated polynomial as a subscript label for the atomic state, using the same nomenclature as above to indicate the and quantum numbers. The expression above all use the Condon–Shortley phase convention which is favored by quantum physicists. Other conventions exist for the phase of the spherical harmonics. Under these different conventions the and orbitals may appear, for example, as the sum and difference of and , contrary to what is shown above. Below is a list of these Cartesian polynomial names for the atomic orbitals. Note that there does not seem to be reference in the literature as to how to abbreviate the long Cartesian spherical harmonic polynomials for so there does not seem be consensus on the naming of orbitals or higher according to this nomenclature. Shapes of orbitals Simple pictures showing orbital shapes are intended to describe the angular forms of regions in space where the electrons occupying the orbital are likely to be found. The diagrams cannot show the entire region where an electron can be found, since according to quantum mechanics there is a non-zero probability of finding the electron (almost) anywhere in space. Instead the diagrams are approximate representations of boundary or contour surfaces where the probability density has a constant value, chosen so that there is a certain probability (for example 90%) of finding the electron within the contour. Although as the square of an absolute value is everywhere non-negative, the sign of the wave function is often indicated in each subregion of the orbital picture. Sometimes the function is graphed to show its phases, rather than which shows probability density but has no phase (which is lost when taking absolute value, since is a complex number). orbital graphs tend to have less spherical, thinner lobes than graphs, but have the same number of lobes in the same places, and otherwise are recognizable. This article, to show wave function phase, shows mostly graphs. The lobes can be seen as standing wave interference patterns between the two counter rotating, ring resonant traveling wave and modes; the projection of the orbital onto the xy plane has a resonant wavelength around the circumference. Although rarely shown, the traveling wave solutions can be seen as rotating banded tori; the bands represent phase information. For each there are two standing wave solutions and . If , the orbital is vertical, counter rotating information is unknown, and the orbital is z-axis symmetric. If there are no counter rotating modes. There are only radial modes and the shape is spherically symmetric. For any given , the smaller is, the more radial nodes there are. For any given , the smaller is, the fewer radial nodes there are (zero for whichever first has that orbital). Loosely speaking, is energy, is analogous to eccentricity, and is orientation. In the classical case, a ring resonant traveling wave, for example in a circular transmission line, unless actively forced, spontaneously decays into a ring resonant standing wave because reflections build up over time at even the smallest imperfection or discontinuity. In general, determines size and energy of the orbital for a given nucleus; as increases, the size of the orbital increases. The higher nuclear charge of heavier elements causes their orbitals to contract by comparison to lighter ones, so that the size of the atom remains very roughly constant, even as the number of electrons increases. Also in general terms, determines an orbital's shape, and its orientation. However, since some orbitals are described by equations in complex numbers, the shape sometimes depends on also. Together, the whole set of orbitals for a given and fill space as symmetrically as possible, though with increasingly complex sets of lobes and nodes. The single s orbitals () are shaped like spheres. For it is roughly a solid ball (densest at center and fades outward exponentially), but for , each single s orbital is made of spherically symmetric surfaces which are nested shells (i.e., the "wave-structure" is radial, following a sinusoidal radial component as well). See illustration of a cross-section of these nested shells, at right. The s orbitals for all numbers are the only orbitals with an anti-node (a region of high wave function density) at the center of the nucleus. All other orbitals (p, d, f, etc.) have angular momentum, and thus avoid the nucleus (having a wave node at the nucleus). Recently, there has been an effort to experimentally image the 1s and 2p orbitals in a SrTiO3 crystal using scanning transmission electron microscopy with energy dispersive x-ray spectroscopy. Because the imaging was conducted using an electron beam, Coulombic beam-orbital interaction that is often termed as the impact parameter effect is included in the outcome (see the figure at right). The shapes of p, d and f orbitals are described verbally here and shown graphically in the Orbitals table below. The three p orbitals for have the form of two ellipsoids with a point of tangency at the nucleus (the two-lobed shape is sometimes referred to as a "dumbbell"—there are two lobes pointing in opposite directions from each other). The three p orbitals in each shell are oriented at right angles to each other, as determined by their respective linear combination of values of . The overall result is a lobe pointing along each direction of the primary axes. Four of the five d orbitals for look similar, each with four pear-shaped lobes, each lobe tangent at right angles to two others, and the centers of all four lying in one plane. Three of these planes are the xy-, xz-, and yz-planes—the lobes are between the pairs of primary axes—and the fourth has the center along the x and y axes themselves. The fifth and final d orbital consists of three regions of high probability density: a torus in between two pear-shaped regions placed symmetrically on its z axis. The overall total of 18 directional lobes point in every primary axis direction and between every pair. There are seven f orbitals, each with shapes more complex than those of the d orbitals. Additionally, as is the case with the s orbitals, individual p, d, f and g orbitals with values higher than the lowest possible value, exhibit an additional radial node structure which is reminiscent of harmonic waves of the same type, as compared with the lowest (or fundamental) mode of the wave. As with s orbitals, this phenomenon provides p, d, f, and g orbitals at the next higher possible value of (for example, 3p orbitals vs. the fundamental 2p), an additional node in each lobe. Still higher values of further increase the number of radial nodes, for each type of orbital. The shapes of atomic orbitals in one-electron atom are related to 3-dimensional spherical harmonics. These shapes are not unique, and any linear combination is valid, like a transformation to cubic harmonics, in fact it is possible to generate sets where all the d's are the same shape, just like the and are the same shape. Although individual orbitals are most often shown independent of each other, the orbitals coexist around the nucleus at the same time. Also, in 1927, Albrecht Unsöld proved that if one sums the electron density of all orbitals of a particular azimuthal quantum number of the same shell (e.g., all three 2p orbitals, or all five 3d orbitals) where each orbital is occupied by an electron or each is occupied by an electron pair, then all angular dependence disappears; that is, the resulting total density of all the atomic orbitals in that subshell (those with the same ) is spherical. This is known as Unsöld's theorem. Orbitals table This table shows the real hydrogen-like wave functions for all atomic orbitals up to 7s, and therefore covers the occupied orbitals in the ground state of all elements in the periodic table up to radium and some beyond. "ψ" graphs are shown with − and + wave function phases shown in two different colors (arbitrarily red and blue). The orbital is the same as the orbital, but the and are formed by taking linear combinations of the and orbitals (which is why they are listed under the label). Also, the and are not the same shape as the , since they are pure spherical harmonics. * No elements with 6f, 7d or 7f electrons have been discovered yet. † Elements with 7p electrons have been discovered, but their electronic configurations are only predicted. ‡ For the elements whose highest occupied orbital is a 6d orbital, only some electronic configurations have been confirmed. (Ds, Rg and Cn are still missing). These are the real-valued orbitals commonly used in chemistry. Only the orbitals where are eigenstates of the orbital angular momentum operator, . The columns with are combinations of two eigenstates. See comparison in the following picture: Qualitative understanding of shapes The shapes of atomic orbitals can be qualitatively understood by considering the analogous case of standing waves on a circular drum. To see the analogy, the mean vibrational displacement of each bit of drum membrane from the equilibrium point over many cycles (a measure of average drum membrane velocity and momentum at that point) must be considered relative to that point's distance from the center of the drum head. If this displacement is taken as being analogous to the probability of finding an electron at a given distance from the nucleus, then it will be seen that the many modes of the vibrating disk form patterns that trace the various shapes of atomic orbitals. The basic reason for this correspondence lies in the fact that the distribution of kinetic energy and momentum in a matter-wave is predictive of where the particle associated with the wave will be. That is, the probability of finding an electron at a given place is also a function of the electron's average momentum at that point, since high electron momentum at a given position tends to "localize" the electron in that position, via the properties of electron wave-packets (see the Heisenberg uncertainty principle for details of the mechanism). This relationship means that certain key features can be observed in both drum membrane modes and atomic orbitals. For example, in all of the modes analogous to s orbitals (the top row in the animated illustration below), it can be seen that the very center of the drum membrane vibrates most strongly, corresponding to the antinode in all s orbitals in an atom. This antinode means the electron is most likely to be at the physical position of the nucleus (which it passes straight through without scattering or striking it), since it is moving (on average) most rapidly at that point, giving it maximal momentum. A mental "planetary orbit" picture closest to the behavior of electrons in s orbitals, all of which have no angular momentum, might perhaps be that of a Keplerian orbit with the orbital eccentricity of 1 but a finite major axis, not physically possible (because particles were to collide), but can be imagined as a limit of orbits with equal major axes but increasing eccentricity. Below, a number of drum membrane vibration modes and the respective wave functions of the hydrogen atom are shown. A correspondence can be considered where the wave functions of a vibrating drum head are for a two-coordinate system and the wave functions for a vibrating sphere are three-coordinate . None of the other sets of modes in a drum membrane have a central antinode, and in all of them the center of the drum does not move. These correspond to a node at the nucleus for all non-s orbitals in an atom. These orbitals all have some angular momentum, and in the planetary model, they correspond to particles in orbit with eccentricity less than 1.0, so that they do not pass straight through the center of the primary body, but keep somewhat away from it. In addition, the drum modes analogous to p and d modes in an atom show spatial irregularity along the different radial directions from the center of the drum, whereas all of the modes analogous to s modes are perfectly symmetrical in radial direction. The non-radial-symmetry properties of non-s orbitals are necessary to localize a particle with angular momentum and a wave nature in an orbital where it must tend to stay away from the central attraction force, since any particle localized at the point of central attraction could have no angular momentum. For these modes, waves in the drum head tend to avoid the central point. Such features again emphasize that the shapes of atomic orbitals are a direct consequence of the wave nature of electrons. Orbital energy In atoms with one electron (hydrogen-like atom), the energy of an orbital (and, consequently, any electron in the orbital) is determined mainly by . The orbital has the lowest possible energy in the atom. Each successively higher value of has a higher energy, but the difference decreases as increases. For high , the energy becomes so high that the electron can easily escape the atom. In single electron atoms, all levels with different within a given are degenerate in the Schrödinger approximation, and have the same energy. This approximation is broken slightly in the solution to the Dirac equation (where energy depends on and another quantum number ), and by the effect of the magnetic field of the nucleus and quantum electrodynamics effects. The latter induce tiny binding energy differences especially for s electrons that go nearer the nucleus, since these feel a very slightly different nuclear charge, even in one-electron atoms; see Lamb shift. In atoms with multiple electrons, the energy of an electron depends not only on its orbital, but also on its interactions with other electrons. These interactions depend on the detail of its spatial probability distribution, and so the energy levels of orbitals depend not only on but also on . Higher values of are associated with higher values of energy; for instance, the 2p state is higher than the 2s state. When , the increase in energy of the orbital becomes so large as to push the energy of orbital above the energy of the s orbital in the next higher shell; when the energy is pushed into the shell two steps higher. The filling of the 3d orbitals does not occur until the 4s orbitals have been filled. The increase in energy for subshells of increasing angular momentum in larger atoms is due to electron–electron interaction effects, and it is specifically related to the ability of low angular momentum electrons to penetrate more effectively toward the nucleus, where they are subject to less screening from the charge of intervening electrons. Thus, in atoms with higher atomic number, the of electrons becomes more and more of a determining factor in their energy, and the principal quantum numbers of electrons becomes less and less important in their energy placement. The energy sequence of the first 35 subshells (e.g., 1s, 2p, 3d, etc.) is given in the following table. Each cell represents a subshell with and given by its row and column indices, respectively. The number in the cell is the subshell's position in the sequence. For a linear listing of the subshells in terms of increasing energies in multielectron atoms, see the section below. Note: empty cells indicate non-existent sublevels, while numbers in italics indicate sublevels that could (potentially) exist, but which do not hold electrons in any element currently known. Electron placement and the periodic table Several rules govern the placement of electrons in orbitals (electron configuration). The first dictates that no two electrons in an atom may have the same set of values of quantum numbers (this is the Pauli exclusion principle). These quantum numbers include the three that define orbitals, as well as , or spin quantum number. Thus, two electrons may occupy a single orbital, so long as they have different values of . However, only two electrons, because of their spin, can be associated with each orbital. Additionally, an electron always tends to fall to the lowest possible energy state. It is possible for it to occupy any orbital so long as it does not violate the Pauli exclusion principle, but if lower-energy orbitals are available, this condition is unstable. The electron will eventually lose energy (by releasing a photon) and drop into the lower orbital. Thus, electrons fill orbitals in the order specified by the energy sequence given above. This behavior is responsible for the structure of the periodic table. The table may be divided into several rows (called 'periods'), numbered starting with 1 at the top. The presently known elements occupy seven periods. If a certain period has number i, it consists of elements whose outermost electrons fall in the ith shell. Niels Bohr was the first to propose (1923) that the periodicity in the properties of the elements might be explained by the periodic filling of the electron energy levels, resulting in the electronic structure of the atom. The periodic table may also be divided into several numbered rectangular 'blocks'. The elements belonging to a given block have this common feature: their highest-energy electrons all belong to the same -state (but the associated with that -state depends upon the period). For instance, the leftmost two columns constitute the 's-block'. The outermost electrons of Li and Be respectively belong to the 2s subshell, and those of Na and Mg to the 3s subshell. The following is the order for filling the "subshell" orbitals, which also gives the order of the "blocks" in the periodic table: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p The "periodic" nature of the filling of orbitals, as well as emergence of the s, p, d, and f "blocks", is more obvious if this order of filling is given in matrix form, with increasing principal quantum numbers starting the new rows ("periods") in the matrix. Then, each subshell (composed of the first two quantum numbers) is repeated as many times as required for each pair of electrons it may contain. The result is a compressed periodic table, with each entry representing two successive elements: Although this is the general order of orbital filling according to the Madelung rule, there are exceptions, and the actual electronic energies of each element are also dependent upon additional details of the atoms (see ). The number of electrons in an electrically neutral atom increases with the atomic number. The electrons in the outermost shell, or valence electrons, tend to be responsible for an element's chemical behavior. Elements that contain the same number of valence electrons can be grouped together and display similar chemical properties. Relativistic effects For elements with high atomic number , the effects of relativity become more pronounced, and especially so for s electrons, which move at relativistic velocities as they penetrate the screening electrons near the core of high- atoms. This relativistic increase in momentum for high speed electrons causes a corresponding decrease in wavelength and contraction of 6s orbitals relative to 5d orbitals (by comparison to corresponding s and d electrons in lighter elements in the same column of the periodic table); this results in 6s valence electrons becoming lowered in energy. Examples of significant physical outcomes of this effect include the lowered melting temperature of mercury (which results from 6s electrons not being available for metal bonding) and the golden color of gold and caesium. In the Bohr model, an electron has a velocity given by , where is the atomic number, is the fine-structure constant, and is the speed of light. In non-relativistic quantum mechanics, therefore, any atom with an atomic number greater than 137 would require its 1s electrons to be traveling faster than the speed of light. Even in the Dirac equation, which accounts for relativistic effects, the wave function of the electron for atoms with is oscillatory and unbounded. The significance of element 137, also known as untriseptium, was first pointed out by the physicist Richard Feynman. Element 137 is sometimes informally called feynmanium (symbol Fy). However, Feynman's approximation fails to predict the exact critical value of due to the non-point-charge nature of the nucleus and very small orbital radius of inner electrons, resulting in a potential seen by inner electrons which is effectively less than . The critical value, which makes the atom unstable with regard to high-field breakdown of the vacuum and production of electron-positron pairs, does not occur until is about 173. These conditions are not seen except transiently in collisions of very heavy nuclei such as lead or uranium in accelerators, where such electron-positron production from these effects has been claimed to be observed. There are no nodes in relativistic orbital densities, although individual components of the wave function will have nodes. pp hybridization (conjectured) In late period 8 elements, a hybrid of 8p3/2 and 9p1/2 is expected to exist, where "3/2" and "1/2" refer to the total angular momentum quantum number. This "pp" hybrid may be responsible for the p-block of the period due to properties similar to p subshells in ordinary valence shells. Energy levels of 8p3/2 and 9p1/2 come close due to relativistic spin–orbit effects; the 9s subshell should also participate, as these elements are expected to be analogous to the respective 5p elements indium through xenon. Transitions between orbitals Bound quantum states have discrete energy levels. When applied to atomic orbitals, this means that the energy differences between states are also discrete. A transition between these states (i.e., an electron absorbing or emitting a photon) can thus happen only if the photon has an energy corresponding with the exact energy difference between said states. Consider two states of the hydrogen atom: State , , and State , , and By quantum theory, state 1 has a fixed energy of , and state 2 has a fixed energy of . Now, what would happen if an electron in state 1 were to move to state 2? For this to happen, the electron would need to gain an energy of exactly . If the electron receives energy that is less than or greater than this value, it cannot jump from state 1 to state 2. Now, suppose we irradiate the atom with a broad-spectrum of light. Photons that reach the atom that have an energy of exactly will be absorbed by the electron in state 1, and that electron will jump to state 2. However, photons that are greater or lower in energy cannot be absorbed by the electron, because the electron can jump only to one of the orbitals, it cannot jump to a state between orbitals. The result is that only photons of a specific frequency will be absorbed by the atom. This creates a line in the spectrum, known as an absorption line, which corresponds to the energy difference between states 1 and 2. The atomic orbital model thus predicts line spectra, which are observed experimentally. This is one of the main validations of the atomic orbital model. The atomic orbital model is nevertheless an approximation to the full quantum theory, which only recognizes many electron states. The predictions of line spectra are qualitatively useful but are not quantitatively accurate for atoms and ions other than those containing only one electron. See also Atomic electron configuration table Wiswesser's rule Condensed matter physics Electron configuration Energy level Hund's rules Molecular orbital Quantum chemistry Quantum chemistry computer programs Solid-state physics Wave function collapse References External links 3D representation of hydrogenic orbitals The Orbitron, a visualization of all common and uncommon atomic orbitals, from 1s to 7g Grand table Still images of many orbitals Atomic physics Chemical bonding Electron states Quantum chemistry Articles containing video clips	7
Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. He is widely considered to be the father of theoretical computer science and artificial intelligence. Born in Maida Vale, London, Turing was raised in southern England. He graduated at King's College, Cambridge, with a degree in mathematics. Whilst he was a fellow at Cambridge, he published a proof demonstrating that some purely mathematical yes–no questions can never be answered by computation. He defined a Turing machine and proved that the halting problem for Turing machines is undecidable. In 1938, he obtained his PhD from the Department of Mathematics at Princeton University. During the Second World War, Turing worked for the Government Code and Cypher School at Bletchley Park, Britain's codebreaking centre that produced Ultra intelligence. For a time he led Hut 8, the section that was responsible for German naval cryptanalysis. Here, he devised a number of techniques for speeding the breaking of German ciphers, including improvements to the pre-war Polish bomba method, an electromechanical machine that could find settings for the Enigma machine. Turing played a crucial role in cracking intercepted coded messages that enabled the Allies to defeat the Axis powers in many crucial engagements, including the Battle of the Atlantic. After the war, Turing worked at the National Physical Laboratory, where he designed the Automatic Computing Engine, one of the first designs for a stored-program computer. In 1948, Turing joined Max Newman's Computing Machine Laboratory at the Victoria University of Manchester, where he helped develop the Manchester computers and became interested in mathematical biology. He wrote a paper on the chemical basis of morphogenesis and predicted oscillating chemical reactions such as the Belousov–Zhabotinsky reaction, first observed in the 1960s. Despite these accomplishments, Turing was never fully recognised in Britain during his lifetime because much of his work was covered by the Official Secrets Act. Turing was prosecuted in 1952 for homosexual acts. He accepted hormone treatment with DES, a procedure commonly referred to as chemical castration, as an alternative to prison. Turing died on 7 June 1954, 16 days before his 42nd birthday, from cyanide poisoning. An inquest determined his death as a suicide, but it has been noted that the known evidence is also consistent with accidental poisoning. Following a public campaign in 2009, British prime minister Gordon Brown made an official public apology on behalf of the government for "the appalling way [Turing] was treated". Queen Elizabeth II granted a posthumous pardon in 2013. The term "Alan Turing law" is now used informally to refer to a 2017 law in the United Kingdom that retroactively pardoned men cautioned or convicted under historical legislation that outlawed homosexual acts. Turing has an extensive legacy with statues of him and many things named after him, including an annual award for computer science innovations. He appears on the current Bank of England £50 note, which was released on 23 June 2021 to coincide with his birthday. A 2019 BBC series, as voted by the audience, named him the greatest person of the 20th century. Early life and education Family Turing was born in Maida Vale, London, while his father, Julius Mathison Turing was on leave from his position with the Indian Civil Service (ICS) of the British Raj government at Chatrapur, then in the Madras Presidency and presently in Odisha state, in India. Turing's father was the son of a clergyman, the Rev. John Robert Turing, from a Scottish family of merchants that had been based in the Netherlands and included a baronet. Turing's mother, Julius's wife, was Ethel Sara Turing (), daughter of Edward Waller Stoney, chief engineer of the Madras Railways. The Stoneys were a Protestant Anglo-Irish gentry family from both County Tipperary and County Longford, while Ethel herself had spent much of her childhood in County Clare. Julius and Ethel married on 1 October 1907 at Bartholomew's church on Clyde Road, in Dublin. Julius's work with the ICS brought the family to British India, where his grandfather had been a general in the Bengal Army. However, both Julius and Ethel wanted their children to be brought up in Britain, so they moved to Maida Vale, London, where Alan Turing was born on 23 June 1912, as recorded by a blue plaque on the outside of the house of his birth, later the Colonnade Hotel. Turing had an elder brother, John Ferrier Turing, father of Sir John Dermot Turing, 12th Baronet of the Turing baronets. Turing's father's civil service commission was still active during Turing's childhood years, and his parents travelled between Hastings in the United Kingdom and India, leaving their two sons to stay with a retired Army couple. At Hastings, Turing stayed at Baston Lodge, Upper Maze Hill, St Leonards-on-Sea, now marked with a blue plaque. The plaque was unveiled on 23 June 2012, the centenary of Turing's birth. Very early in life, Turing showed signs of the genius that he was later to display prominently. His parents purchased a house in Guildford in 1927, and Turing lived there during school holidays. The location is also marked with a blue plaque. School Turing's parents enrolled him at St Michael's, a primary school at 20 Charles Road, St Leonards-on-Sea, from the age of six to nine. The headmistress recognised his talent, noting that she has "...had clever boys and hardworking boys, but Alan is a genius". Between January 1922 and 1926, Turing was educated at Hazelhurst Preparatory School, an independent school in the village of Frant in Sussex (now East Sussex). In 1926, at the age of 13, he went on to Sherborne School, an independent boarding school in the market town of Sherborne in Dorset, where he boarded at Westcott House. The first day of term coincided with the 1926 General Strike, in Britain, but Turing was so determined to attend that he rode his bicycle unaccompanied from Southampton to Sherborne, stopping overnight at an inn. Turing's natural inclination towards mathematics and science did not earn him respect from some of the teachers at Sherborne, whose definition of education placed more emphasis on the classics. His headmaster wrote to his parents: "I hope he will not fall between two stools. If he is to stay at public school, he must aim at becoming educated. If he is to be solely a Scientific Specialist, he is wasting his time at a public school". Despite this, Turing continued to show remarkable ability in the studies he loved, solving advanced problems in 1927 without having studied even elementary calculus. In 1928, aged 16, Turing encountered Albert Einstein's work; not only did he grasp it, but it is possible that he managed to deduce Einstein's questioning of Newton's laws of motion from a text in which this was never made explicit. Christopher Morcom At Sherborne, Turing formed a significant friendship with fellow pupil Christopher Collan Morcom (13 July 1911 – 13 February 1930), who has been described as Turing's first love. Their relationship provided inspiration in Turing's future endeavours, but it was cut short by Morcom's death, in February 1930, from complications of bovine tuberculosis, contracted after drinking infected cow's milk some years previously. The event caused Turing great sorrow. He coped with his grief by working that much harder on the topics of science and mathematics that he had shared with Morcom. In a letter to Morcom's mother, Frances Isobel Morcom (née Swan), Turing wrote: Turing's relationship with Morcom's mother continued long after Morcom's death, with her sending gifts to Turing, and him sending letters, typically on Morcom's birthday. A day before the third anniversary of Morcom's death (13 February 1933), he wrote to Mrs. Morcom: Some have speculated that Morcom's death was the cause of Turing's atheism and materialism. Apparently, at this point in his life he still believed in such concepts as a spirit, independent of the body and surviving death. In a later letter, also written to Morcom's mother, Turing wrote: University and work on computability After graduating from Sherborne, Turing studied the undergraduate course in Schedule B (that is, a three-year Parts I and II, of the Mathematical Tripos, with extra courses at the end of the third year, as Part III only emerged as a separate degree in 1934) from February 1931 to November 1934 at King's College, Cambridge, where he was awarded first-class honours in mathematics. His dissertation, On the Gaussian error function, written during his senior year and delivered in November 1934 (with a deadline date of 6 December) proved a version of the central limit theorem. It was finally accepted on 16 March 1935. By spring of that same year, Turing started his master's course (Part III)—which he completed in 1937—and, at the same time, he published his first paper, a one-page article called Equivalence of left and right almost periodicity (sent on 23 April), featured in the tenth volume of the Journal of the London Mathematical Society. Later that year, Turing was elected a Fellow of King's College on the strength of his dissertation. However, and, unknown to Turing, this version of the theorem he proved in his paper, had already been proven, in 1922, by Jarl Waldemar Lindeberg. Despite this, the committee found Turing's methods original and so regarded the work worthy of consideration for the fellowship. Abram Besicovitch's report for the committee went so far as to say that if Turing's work had been published before Lindeberg's, it would have been "an important event in the mathematical literature of that year". Between the springs of 1935 and 1936, at the same time as Church, Turing worked on the decidability of problems, starting from Godel's incompleteness theorems. In mid-April 1936, Turing sent Max Newman the first draft typescript of his investigations. That same month, Alonzo Church published his An Unsolvable Problem of Elementary Number Theory, with similar conclusions to Turing's then-yet unpublished work. Finally, on 28 May of that year, he finished and delivered his 36-page paper for publication called "On Computable Numbers, with an Application to the Entscheidungsproblem". It was published in the Proceedings of the London Mathematical Society journal in two parts, the first on 30 November and the second on 23 December. In this paper, Turing reformulated Kurt Gödel's 1931 results on the limits of proof and computation, replacing Gödel's universal arithmetic-based formal language with the formal and simple hypothetical devices that became known as Turing machines. The Entscheidungsproblem (decision problem) was originally posed by German mathematician David Hilbert in 1928. Turing proved that his "universal computing machine" would be capable of performing any conceivable mathematical computation if it were representable as an algorithm. He went on to prove that there was no solution to the decision problem by first showing that the halting problem for Turing machines is undecidable: it is not possible to decide algorithmically whether a Turing machine will ever halt. This paper has been called "easily the most influential math paper in history". Although Turing's proof was published shortly after Alonzo Church's equivalent proof using his lambda calculus, Turing's approach is considerably more accessible and intuitive than Church's. It also included a notion of a 'Universal Machine' (now known as a universal Turing machine), with the idea that such a machine could perform the tasks of any other computation machine (as indeed could Church's lambda calculus). According to the Church–Turing thesis, Turing machines and the lambda calculus are capable of computing anything that is computable. John von Neumann acknowledged that the central concept of the modern computer was due to Turing's paper. To this day, Turing machines are a central object of study in theory of computation. From September 1936 to July 1938, Turing spent most of his time studying under Church at Princeton University, in the second year as a Jane Eliza Procter Visiting Fellow. In addition to his purely mathematical work, he studied cryptology and also built three of four stages of an electro-mechanical binary multiplier. In June 1938, he obtained his PhD from the Department of Mathematics at Princeton; his dissertation, Systems of Logic Based on Ordinals, introduced the concept of ordinal logic and the notion of relative computing, in which Turing machines are augmented with so-called oracles, allowing the study of problems that cannot be solved by Turing machines. John von Neumann wanted to hire him as his postdoctoral assistant, but he went back to the United Kingdom. Career and research When Turing returned to Cambridge, he attended lectures given in 1939 by Ludwig Wittgenstein about the foundations of mathematics. The lectures have been reconstructed verbatim, including interjections from Turing and other students, from students' notes. Turing and Wittgenstein argued and disagreed, with Turing defending formalism and Wittgenstein propounding his view that mathematics does not discover any absolute truths, but rather invents them. Cryptanalysis During the Second World War, Turing was a leading participant in the breaking of German ciphers at Bletchley Park. The historian and wartime codebreaker Asa Briggs has said, "You needed exceptional talent, you needed genius at Bletchley and Turing's was that genius." From September 1938, Turing worked part-time with the Government Code and Cypher School (GC&CS), the British codebreaking organisation. He concentrated on cryptanalysis of the Enigma cipher machine used by Nazi Germany, together with Dilly Knox, a senior GC&CS codebreaker. Soon after the July 1939 meeting near Warsaw at which the Polish Cipher Bureau gave the British and French details of the wiring of Enigma machine's rotors and their method of decrypting Enigma machine's messages, Turing and Knox developed a broader solution. The Polish method relied on an insecure indicator procedure that the Germans were likely to change, which they in fact did in May 1940. Turing's approach was more general, using crib-based decryption for which he produced the functional specification of the bombe (an improvement on the Polish Bomba). On 4 September 1939, the day after the UK declared war on Germany, Turing reported to Bletchley Park, the wartime station of GC&CS. Like all others who came to Bletchley, he was required to sign the Official Secrets Act, in which he agreed not to disclose anything about his work at Bletchley, with severe legal penalties for violating the Act. Specifying the bombe was the first of five major cryptanalytical advances that Turing made during the war. The others were: deducing the indicator procedure used by the German navy; developing a statistical procedure dubbed Banburismus for making much more efficient use of the bombes; developing a procedure dubbed Turingery for working out the cam settings of the wheels of the Lorenz SZ 40/42 (Tunny) cipher machine and, towards the end of the war, the development of a portable secure voice scrambler at Hanslope Park that was codenamed Delilah. By using statistical techniques to optimise the trial of different possibilities in the code breaking process, Turing made an innovative contribution to the subject. He wrote two papers discussing mathematical approaches, titled The Applications of Probability to Cryptography and Paper on Statistics of Repetitions, which were of such value to GC&CS and its successor GCHQ that they were not released to the UK National Archives until April 2012, shortly before the centenary of his birth. A GCHQ mathematician, "who identified himself only as Richard," said at the time that the fact that the contents had been restricted under the Official Secrets Act for some 70 years demonstrated their importance, and their relevance to post-war cryptanalysis: Turing had a reputation for eccentricity at Bletchley Park. He was known to his colleagues as "Prof" and his treatise on Enigma was known as the "Prof's Book". According to historian Ronald Lewin, Jack Good, a cryptanalyst who worked with Turing, said of his colleague: Peter Hilton recounted his experience working with Turing in Hut 8 in his "Reminiscences of Bletchley Park" from A Century of Mathematics in America: Hilton echoed similar thoughts in the Nova PBS documentary Decoding Nazi Secrets. While working at Bletchley, Turing, who was a talented long-distance runner, occasionally ran the to London when he was needed for meetings, and he was capable of world-class marathon standards. Turing tried out for the 1948 British Olympic team, but he was hampered by an injury. His tryout time for the marathon was only 11 minutes slower than British silver medallist Thomas Richards' Olympic race time of 2 hours 35 minutes. He was Walton Athletic Club's best runner, a fact discovered when he passed the group while running alone. When asked why he ran so hard in training he replied: Due to the problems of counterfactual history, it is hard to estimate the precise effect Ultra intelligence had on the war. However, official war historian Harry Hinsley estimated that this work shortened the war in Europe by more than two years and saved over 14 million lives. At the end of the war, a memo was sent to all those who had worked at Bletchley Park, reminding them that the code of silence dictated by the Official Secrets Act did not end with the war but would continue indefinitely. Thus, even though Turing was appointed an Officer of the Order of the British Empire (OBE) in 1946 by King George VI for his wartime services, his work remained secret for many years. Bombe Within weeks of arriving at Bletchley Park, Turing had specified an electromechanical machine called the bombe, which could break Enigma more effectively than the Polish bomba kryptologiczna, from which its name was derived. The bombe, with an enhancement suggested by mathematician Gordon Welchman, became one of the primary tools, and the major automated one, used to attack Enigma-enciphered messages. The bombe searched for possible correct settings used for an Enigma message (i.e., rotor order, rotor settings and plugboard settings) using a suitable crib: a fragment of probable plaintext. For each possible setting of the rotors (which had on the order of 1019 states, or 1022 states for the four-rotor U-boat variant), the bombe performed a chain of logical deductions based on the crib, implemented electromechanically. The bombe detected when a contradiction had occurred and ruled out that setting, moving on to the next. Most of the possible settings would cause contradictions and be discarded, leaving only a few to be investigated in detail. A contradiction would occur when an enciphered letter would be turned back into the same plaintext letter, which was impossible with the Enigma. The first bombe was installed on 18 March 1940. Action This Day By late 1941, Turing and his fellow cryptanalysts Gordon Welchman, Hugh Alexander and Stuart Milner-Barry were frustrated. Building on the work of the Poles, they had set up a good working system for decrypting Enigma signals, but their limited staff and bombes meant they could not translate all the signals. In the summer, they had considerable success, and shipping losses had fallen to under 100,000 tons a month; however, they badly needed more resources to keep abreast of German adjustments. They had tried to get more people and fund more bombes through the proper channels, but had failed. On 28 October they wrote directly to Winston Churchill explaining their difficulties, with Turing as the first named. They emphasised how small their need was compared with the vast expenditure of men and money by the forces and compared with the level of assistance they could offer to the forces. As Andrew Hodges, biographer of Turing, later wrote, "This letter had an electric effect." Churchill wrote a memo to General Ismay, which read: "ACTION THIS DAY. Make sure they have all they want on extreme priority and report to me that this has been done." On 18 November, the chief of the secret service reported that every possible measure was being taken. The cryptographers at Bletchley Park did not know of the Prime Minister's response, but as Milner-Barry recalled, "All that we did notice was that almost from that day the rough ways began miraculously to be made smooth." More than two hundred bombes were in operation by the end of the war. Hut 8 and the naval Enigma Turing decided to tackle the particularly difficult problem of German naval Enigma "because no one else was doing anything about it and I could have it to myself". In December 1939, Turing solved the essential part of the naval indicator system, which was more complex than the indicator systems used by the other services. That same night, he also conceived of the idea of Banburismus, a sequential statistical technique (what Abraham Wald later called sequential analysis) to assist in breaking the naval Enigma, "though I was not sure that it would work in practice, and was not, in fact, sure until some days had actually broken". For this, he invented a measure of weight of evidence that he called the ban. Banburismus could rule out certain sequences of the Enigma rotors, substantially reducing the time needed to test settings on the bombes. Later this sequential process of accumulating sufficient weight of evidence using decibans (one tenth of a ban) was used in Cryptanalysis of the Lorenz cipher. Turing travelled to the United States in November 1942 and worked with US Navy cryptanalysts on the naval Enigma and bombe construction in Washington. He also visited their Computing Machine Laboratory in Dayton, Ohio. Turing's reaction to the American bombe design was far from enthusiastic: During this trip, he also assisted at Bell Labs with the development of secure speech devices. He returned to Bletchley Park in March 1943. During his absence, Hugh Alexander had officially assumed the position of head of Hut 8, although Alexander had been de facto head for some time (Turing having little interest in the day-to-day running of the section). Turing became a general consultant for cryptanalysis at Bletchley Park. Alexander wrote of Turing's contribution: Turingery In July 1942, Turing devised a technique termed Turingery (or jokingly Turingismus) for use against the Lorenz cipher messages produced by the Germans' new Geheimschreiber (secret writer) machine. This was a teleprinter rotor cipher attachment codenamed Tunny at Bletchley Park. Turingery was a method of wheel-breaking, i.e., a procedure for working out the cam settings of Tunny's wheels. He also introduced the Tunny team to Tommy Flowers who, under the guidance of Max Newman, went on to build the Colossus computer, the world's first programmable digital electronic computer, which replaced a simpler prior machine (the Heath Robinson), and whose superior speed allowed the statistical decryption techniques to be applied usefully to the messages. Some have mistakenly said that Turing was a key figure in the design of the Colossus computer. Turingery and the statistical approach of Banburismus undoubtedly fed into the thinking about cryptanalysis of the Lorenz cipher, but he was not directly involved in the Colossus development. Delilah Following his work at Bell Labs in the US, Turing pursued the idea of electronic enciphering of speech in the telephone system. In the latter part of the war, he moved to work for the Secret Service's Radio Security Service (later HMGCC) at Hanslope Park. At the park, he further developed his knowledge of electronics with the assistance of REME officer Donald Bayley. Together they undertook the design and construction of a portable secure voice communications machine codenamed Delilah. The machine was intended for different applications, but it lacked the capability for use with long-distance radio transmissions. In any case, Delilah was completed too late to be used during the war. Though the system worked fully, with Turing demonstrating it to officials by encrypting and decrypting a recording of a Winston Churchill speech, Delilah was not adopted for use. Turing also consulted with Bell Labs on the development of SIGSALY, a secure voice system that was used in the later years of the war. Early computers and the Turing test Between 1945 and 1947, Turing lived in Hampton, London, while he worked on the design of the ACE (Automatic Computing Engine) at the National Physical Laboratory (NPL). He presented a paper on 19 February 1946, which was the first detailed design of a stored-program computer. Von Neumann's incomplete First Draft of a Report on the EDVAC had predated Turing's paper, but it was much less detailed and, according to John R. Womersley, Superintendent of the NPL Mathematics Division, it "contains a number of ideas which are Dr. Turing's own". Although ACE was a feasible design, the effect of the Official Secrets Act surrounding the wartime work at Bletchley Park made it impossible for Turing to explain the basis of his analysis of how a computer installation involving human operators would work. This led to delays in starting the project and he became disillusioned. In late 1947 he returned to Cambridge for a sabbatical year during which he produced a seminal work on Intelligent Machinery that was not published in his lifetime. While he was at Cambridge, the Pilot ACE was being built in his absence. It executed its first program on 10 May 1950, and a number of later computers around the world owe much to it, including the English Electric DEUCE and the American Bendix G-15. The full version of Turing's ACE was not built until after his death. According to the memoirs of the German computer pioneer Heinz Billing from the Max Planck Institute for Physics, published by Genscher, Düsseldorf, there was a meeting between Turing and Konrad Zuse. It took place in Göttingen in 1947. The interrogation had the form of a colloquium. Participants were Womersley, Turing, Porter from England and a few German researchers like Zuse, Walther, and Billing (for more details see Herbert Bruderer, Konrad Zuse und die Schweiz). In 1948, Turing was appointed reader in the Mathematics Department at the Victoria University of Manchester. A year later, he became deputy director of the Computing Machine Laboratory, where he worked on software for one of the earliest stored-program computers—the Manchester Mark 1. Turing wrote the first version of the Programmer's Manual for this machine, and was recruited by Ferranti as a consultant in the development of their commercialised machine, the Ferranti Mark 1. He continued to be paid consultancy fees by Ferranti until his death. During this time, he continued to do more abstract work in mathematics, and in "Computing Machinery and Intelligence" (Mind, October 1950), Turing addressed the problem of artificial intelligence, and proposed an experiment that became known as the Turing test, an attempt to define a standard for a machine to be called "intelligent". The idea was that a computer could be said to "think" if a human interrogator could not tell it apart, through conversation, from a human being. In the paper, Turing suggested that rather than building a program to simulate the adult mind, it would be better to produce a simpler one to simulate a child's mind and then to subject it to a course of education. A reversed form of the Turing test is widely used on the Internet; the CAPTCHA test is intended to determine whether the user is a human or a computer. In 1948, Turing, working with his former undergraduate colleague, D.G. Champernowne, began writing a chess program for a computer that did not yet exist. By 1950, the program was completed and dubbed the Turochamp. In 1952, he tried to implement it on a Ferranti Mark 1, but lacking enough power, the computer was unable to execute the program. Instead, Turing "ran" the program by flipping through the pages of the algorithm and carrying out its instructions on a chessboard, taking about half an hour per move. The game was recorded. According to Garry Kasparov, Turing's program "played a recognizable game of chess". The program lost to Turing's colleague Alick Glennie, although it is said that it won a game against Champernowne's wife, Isabel. His Turing test was a significant, characteristically provocative, and lasting contribution to the debate regarding artificial intelligence, which continues after more than half a century. Pattern formation and mathematical biology When Turing was 39 years old in 1951, he turned to mathematical biology, finally publishing his masterpiece "The Chemical Basis of Morphogenesis" in January 1952. He was interested in morphogenesis, the development of patterns and shapes in biological organisms. He suggested that a system of chemicals reacting with each other and diffusing across space, termed a reaction–diffusion system, could account for "the main phenomena of morphogenesis". He used systems of partial differential equations to model catalytic chemical reactions. For example, if a catalyst A is required for a certain chemical reaction to take place, and if the reaction produced more of the catalyst A, then we say that the reaction is autocatalytic, and there is positive feedback that can be modelled by nonlinear differential equations. Turing discovered that patterns could be created if the chemical reaction not only produced catalyst A, but also produced an inhibitor B that slowed down the production of A. If A and B then diffused through the container at different rates, then you could have some regions where A dominated and some where B did. To calculate the extent of this, Turing would have needed a powerful computer, but these were not so freely available in 1951, so he had to use linear approximations to solve the equations by hand. These calculations gave the right qualitative results, and produced, for example, a uniform mixture that oddly enough had regularly spaced fixed red spots. The Russian biochemist Boris Belousov had performed experiments with similar results, but could not get his papers published because of the contemporary prejudice that any such thing violated the second law of thermodynamics. Belousov was not aware of Turing's paper in the Philosophical Transactions of the Royal Society. Although published before the structure and role of DNA was understood, Turing's work on morphogenesis remains relevant today and is considered a seminal piece of work in mathematical biology. One of the early applications of Turing's paper was the work by James Murray explaining spots and stripes on the fur of cats, large and small. Further research in the area suggests that Turing's work can partially explain the growth of "feathers, hair follicles, the branching pattern of lungs, and even the left-right asymmetry that puts the heart on the left side of the chest". In 2012, Sheth, et al. found that in mice, removal of Hox genes causes an increase in the number of digits without an increase in the overall size of the limb, suggesting that Hox genes control digit formation by tuning the wavelength of a Turing-type mechanism. Later papers were not available until Collected Works of A. M. Turing was published in 1992. A study conducted in 2023 confirmed Turing's mathematical model hypothesis. Presented by the American Physical Society, the experiment involved growing chia seeds in even layers within trays, later adjusting the available moisture. Researchers experimentally tweaked the factors which appear in the Turing equations, and, as a result, patterns resembling those seen in natural environments emerged. This is believed to be the first time that experiments with living vegetation have verified Turing's mathematical insight. Personal life Treasure In the 1940s, Turing became worried about losing his savings in the event of a German invasion. In order to protect it, he bought two silver bars weighing and worth £250 (in 2022, £8,000 adjusted for inflation, £48,000 at spot price) and buried them in a wood near Bletchley Park. Upon returning to dig them up, Turing found that he was unable to break his own code describing where exactly he had hidden them. This, along with the fact that the area had been renovated, meant that he never regained the silver. Engagement In 1941, Turing proposed marriage to Hut 8 colleague Joan Clarke, a fellow mathematician and cryptanalyst, but their engagement was short-lived. After admitting his homosexuality to his fiancée, who was reportedly "unfazed" by the revelation, Turing decided that he could not go through with the marriage. Homosexuality and indecency conviction In January 1952, Turing was 39 when he started a relationship with Arnold Murray, a 19-year-old unemployed man. Just before Christmas, Turing was walking along Manchester's Oxford Road when he met Murray just outside the Regal Cinema and invited him to lunch. On 23 January, Turing's house was burgled. Murray told Turing that he and the burglar were acquainted, and Turing reported the crime to the police. During the investigation, he acknowledged a sexual relationship with Murray. Homosexual acts were criminal offences in the United Kingdom at that time, and both men were charged with "gross indecency" under Section 11 of the Criminal Law Amendment Act 1885. Initial committal proceedings for the trial were held on 27 February during which Turing's solicitor "reserved his defence", i.e., did not argue or provide evidence against the allegations. The proceedings were held at the Sessions House in Knutsford. Turing was later convinced by the advice of his brother and his own solicitor, and he entered a plea of guilty. The case, Regina v. Turing and Murray, was brought to trial on 31 March 1952. Turing was convicted and given a choice between imprisonment and probation. His probation would be conditional on his agreement to undergo hormonal physical changes designed to reduce libido, known as "chemical castration". He accepted the option of injections of what was then called stilboestrol (now known as diethylstilbestrol or DES), a synthetic oestrogen; this feminization of his body was continued for the course of one year. The treatment rendered Turing impotent and caused breast tissue to form, fulfilling in the literal sense Turing's prediction that "no doubt I shall emerge from it all a different man, but quite who I've not found out". Murray was given a conditional discharge. Turing's conviction led to the removal of his security clearance and barred him from continuing with his cryptographic consultancy for the Government Communications Headquarters (GCHQ), the British signals intelligence agency that had evolved from GC&CS in 1946, though he kept his academic job. His trial took place only months after the defection to the Soviet Union of Guy Burgess and Donald Maclean in summer 1951 after which the Foreign Office started to consider anyone known to be homosexual as a potential security risk. Turing was denied entry into the United States after his conviction in 1952, but was free to visit other European countries. In the summer of 1952 he visited Norway which was more tolerant of homosexuals. Among the various men he met there was one named Kjell Carlson. Kjell intended to visit Turing in the UK but the authorities intercepted Kjell's postcard detailing his travel arrangements and were able to intercept and deport him before the two could meet. It was also during this time that Turing started consulting a psychiatrist, Dr Franz Greenbaum, with whom he got on well and subsequently becoming a family friend. Death On 8 June 1954, at his house at 43 Adlington Road, Wilmslow, Turing's housekeeper found him dead. A post mortem was held that evening which determined that he had died the previous day at the age of 41 with Cyanide poisoning cited as the cause of death. When his body was discovered, an apple lay half-eaten beside his bed, and although the apple was not tested for cyanide, it was speculated that this was the means by which Turing had consumed a fatal dose. Turing's brother John identified the body the following day and took the advice given by Dr. Greenbaum to accept the verdict of the inquest as there was little prospect of establishing that the death was accidental. The inquest was held the following day which determined the cause of death to be suicide. Turing's remains were cremated at Woking Crematorium just two days later on 12 June 1954 with just three people attending and his ashes were scattered in the gardens of the crematorium, just as his father's had been. Turing's mother was on holiday in Italy at the time of his death and returned home after the inquest. She never accepted the verdict of suicide. Andrew Hodges and another biographer, David Leavitt, have both speculated that Turing was re-enacting a scene from the Walt Disney film Snow White and the Seven Dwarfs (1937), his favourite fairy tale. Both men noted that (in Leavitt's words) he took "an especially keen pleasure in the scene where the Wicked Queen immerses her apple in the poisonous brew". Philosopher Jack Copeland has questioned various aspects of the coroner's historical verdict. He suggested an alternative explanation for the cause of Turing's death: the accidental inhalation of cyanide fumes from an apparatus used to electroplate gold onto spoons. The potassium cyanide was used to dissolve the gold. Turing had such an apparatus set up in his tiny spare room. Copeland noted that the autopsy findings were more consistent with inhalation than with ingestion of the poison. Turing also habitually ate an apple before going to bed, and it was not unusual for the apple to be discarded half-eaten. Furthermore, Turing had reportedly borne his legal setbacks and hormone treatment (which had been discontinued a year previously) "with good humour" and had shown no sign of despondency before his death. He even set down a list of tasks that he intended to complete upon returning to his office after the holiday weekend. Turing's mother believed that the ingestion was accidental, resulting from her son's careless storage of laboratory chemicals. Biographer Andrew Hodges theorised that Turing deliberately left the nature of his death ambiguous in order to shield his mother from the knowledge that he had killed himself. It has been suggested that Turing's belief in fortune-telling may have caused his depressed mood. As a youth, Turing had been told by a fortune-teller that he would be a genius. In mid-May 1954, shortly before his death, Turing again decided to consult a fortune-teller during a day-trip to St Annes-on-Sea with the Greenbaum family. According to the Greenbaums' daughter, Barbara: Government apology and pardon In August 2009, British programmer John Graham-Cumming started a petition urging the British government to apologise for Turing's prosecution as a homosexual. The petition received more than 30,000 signatures. The prime minister, Gordon Brown, acknowledged the petition, releasing a statement on 10 September 2009 apologising and describing the treatment of Turing as "appalling": In December 2011, William Jones and his member of Parliament, John Leech, created an e-petition requesting that the British government pardon Turing for his conviction of "gross indecency": The petition gathered over 37,000 signatures, and was submitted to Parliament by the Manchester MP John Leech but the request was discouraged by Justice Minister Lord McNally, who said: John Leech, the MP for Manchester Withington (2005–15), submitted several bills to Parliament and led a high-profile campaign to secure the pardon. Leech made the case in the House of Commons that Turing's contribution to the war made him a national hero and that it was "ultimately just embarrassing" that the conviction still stood. Leech continued to take the bill through Parliament and campaigned for several years, gaining the public support of numerous leading scientists, including Stephen Hawking. At the British premiere of a film based on Turing's life, The Imitation Game, the producers thanked Leech for bringing the topic to public attention and securing Turing's pardon. Leech is now regularly described as the "architect" of Turing's pardon and subsequently the Alan Turing Law which went on to secure pardons for 75,000 other men and women convicted of similar crimes. On 26 July 2012, a bill was introduced in the House of Lords to grant a statutory pardon to Turing for offences under section 11 of the Criminal Law Amendment Act 1885, of which he was convicted on 31 March 1952. Late in the year in a letter to The Daily Telegraph, the physicist Stephen Hawking and 10 other signatories including the Astronomer Royal Lord Rees, President of the Royal Society Sir Paul Nurse, Lady Trumpington (who worked for Turing during the war) and Lord Sharkey (the bill's sponsor) called on Prime Minister David Cameron to act on the pardon request. The government indicated it would support the bill, and it passed its third reading in the House of Lords in October. At the bill's second reading in the House of Commons on 29 November 2013, Conservative MP Christopher Chope objected to the bill, delaying its passage. The bill was due to return to the House of Commons on 28 February 2014, but before the bill could be debated in the House of Commons, the government elected to proceed under the royal prerogative of mercy. On 24 December 2013, Queen Elizabeth II signed a pardon for Turing's conviction for "gross indecency", with immediate effect. Announcing the pardon, Lord Chancellor Chris Grayling said Turing deserved to be "remembered and recognised for his fantastic contribution to the war effort" and not for his later criminal conviction. The Queen officially pronounced Turing pardoned in August 2014. The Queen's action is only the fourth royal pardon granted since the conclusion of the Second World War. Pardons are normally granted only when the person is technically innocent, and a request has been made by the family or other interested party; neither condition was met in regard to Turing's conviction. In September 2016, the government announced its intention to expand this retroactive exoneration to other men convicted of similar historical indecency offences, in what was described as an "Alan Turing law". The Alan Turing law is now an informal term for the law in the United Kingdom, contained in the Policing and Crime Act 2017, which serves as an amnesty law to retroactively pardon men who were cautioned or convicted under historical legislation that outlawed homosexual acts. The law applies in England and Wales. On 19 July 2023, following an apology to LGBT veterans from the UK Government, Defence Secretary Ben Wallace suggested Turing should be honoured with a permanent statue on the fourth plinth of Trafalgar Square, describing Dr Turing as "probably the greatest war hero, in my book, of the Second World War, [whose] achievements shortened the war, saved thousands of lives, helped defeat the Nazis. And his story is a sad story of a society and how it treated him." See also Legacy of Alan Turing List of things named after Alan Turing Notes and references Notes References Sources in and Turing's mother, who survived him by many years, wrote this 157-page biography of her son, glorifying his life. It was published in 1959, and so could not cover his war work. Scarcely 300 copies were sold (Sara Turing to Lyn Newman, 1967, Library of St John's College, Cambridge). The six-page foreword by Lyn Irvine includes reminiscences and is more frequently quoted. It was re-published by Cambridge University Press in 2012, to honour the centenary of his birth, and included a new foreword by Martin Davis, as well as a never-before-published memoir by Turing's older brother John F. Turing. This 1986 Hugh Whitemore play tells the story of Turing's life and death. In the original West End and Broadway runs, Derek Jacobi played Turing and he recreated the role in a 1997 television film based on the play made jointly by the BBC and WGBH, Boston. The play is published by Amber Lane Press, Oxford, ASIN: B000B7TM0Q Further reading Articles Books (originally published in 1983); basis of the film The Imitation Game (originally published in 1959 by W. Heffer & Sons, Ltd) External links Oral history interview with Nicholas C. Metropolis, Charles Babbage Institute, University of Minnesota. Metropolis was the first director of computing services at Los Alamos National Laboratory; topics include the relationship between Turing and John von Neumann How Alan Turing Cracked The Enigma Code Imperial War Museums Alan Turing Year CiE 2012: Turing Centenary Conference Science in the Making Alan Turing's papers in the Royal Society's archives Alan Turing site maintained by Andrew Hodges including a short biography AlanTuring.net – Turing Archive for the History of Computing by Jack Copeland The Turing Archive – contains scans of some unpublished documents and material from the King's College, Cambridge archive Alan Turing Papers – University of Manchester Library, Manchester Sherborne School Archives – holds papers relating to Turing's time at Sherborne School Alan Turing plaques recorded on openplaques.org Alan Turing archive on New Scientist 1912 births 1954 suicides 1954 deaths 20th-century English mathematicians 20th-century atheists 20th-century English philosophers Academics of the University of Manchester Academics of the University of Manchester Institute of Science and Technology Alumni of King's College, Cambridge Artificial intelligence researchers Bayesian statisticians Bletchley Park people British anti-fascists British cryptographers British people of World War II Computability theorists Computer designers English atheists English computer scientists English inventors English logicians English male long-distance runners English people of Irish descent English people of Scottish descent Fellows of King's College, Cambridge Fellows of the Royal Society Former Protestants Foreign Office personnel of World War II Gay academics Gay scientists Gay sportsmen GCHQ people History of computing in the United Kingdom LGBT-related suicides LGBT mathematicians LGBT philosophers British LGBT scientists English LGBT sportspeople LGBT track and field athletes Officers of the Order of the British Empire People educated at Sherborne School People from Maida Vale People from Wilmslow People convicted for homosexuality in the United Kingdom People who have received posthumous pardons Princeton University alumni Recipients of British royal pardons Theoretical biologists Theoretical computer scientists Suicides by cyanide poisoning Suicides in England Castrated people Scientists of the National Physical Laboratory (United Kingdom) Computer chess people Enigma machine	9
Area is the measure of a region's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). Two different regions may have the same area (as in squaring the circle); by synecdoche, "area" sometimes is used to refer to the region, as in a "polygonal area". The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number. There are several well-known formulas for the areas of simple shapes such as triangles, rectangles, and circles. Using these formulas, the area of any polygon can be found by dividing the polygon into triangles. For shapes with curved boundary, calculus is usually required to compute the area. Indeed, the problem of determining the area of plane figures was a major motivation for the historical development of calculus. For a solid shape such as a sphere, cone, or cylinder, the area of its boundary surface is called the surface area. Formulas for the surface areas of simple shapes were computed by the ancient Greeks, but computing the surface area of a more complicated shape usually requires multivariable calculus. Area plays an important role in modern mathematics. In addition to its obvious importance in geometry and calculus, area is related to the definition of determinants in linear algebra, and is a basic property of surfaces in differential geometry. In analysis, the area of a subset of the plane is defined using Lebesgue measure, though not every subset is measurable. In general, area in higher mathematics is seen as a special case of volume for two-dimensional regions. Area can be defined through the use of axioms, defining it as a function of a collection of certain plane figures to the set of real numbers. It can be proved that such a function exists. Formal definition An approach to defining what is meant by "area" is through axioms. "Area" can be defined as a function from a collection M of a special kinds of plane figures (termed measurable sets) to the set of real numbers, which satisfies the following properties: For all S in M, . If S and T are in M then so are and , and also . If S and T are in M with then is in M and . If a set S is in M and S is congruent to T then T is also in M and . Every rectangle R is in M. If the rectangle has length h and breadth k then . Let Q be a set enclosed between two step regions S and T. A step region is formed from a finite union of adjacent rectangles resting on a common base, i.e. . If there is a unique number c such that for all such step regions S and T, then . It can be proved that such an area function actually exists. Units Every unit of length has a corresponding unit of area, namely the area of a square with the given side length. Thus areas can be measured in square metres (m2), square centimetres (cm2), square millimetres (mm2), square kilometres (km2), square feet (ft2), square yards (yd2), square miles (mi2), and so forth. Algebraically, these units can be thought of as the squares of the corresponding length units. The SI unit of area is the square metre, which is considered an SI derived unit. Conversions Calculation of the area of a square whose length and width are 1 metre would be: 1 metre × 1 metre = 1 m2 and so, a rectangle with different sides (say length of 3 metres and width of 2 metres) would have an area in square units that can be calculated as: 3 metres × 2 metres = 6 m2. This is equivalent to 6 million square millimetres. Other useful conversions are: 1 square kilometre = 1,000,000 square metres 1 square metre = 10,000 square centimetres = 1,000,000 square millimetres 1 square centimetre = 100 square millimetres. Non-metric units In non-metric units, the conversion between two square units is the square of the conversion between the corresponding length units. 1 foot = 12 inches, the relationship between square feet and square inches is 1 square foot = 144 square inches, where 144 = 122 = 12 × 12. Similarly: 1 square yard = 9 square feet 1 square mile = 3,097,600 square yards = 27,878,400 square feet In addition, conversion factors include: 1 square inch = 6.4516 square centimetres 1 square foot = square metres 1 square yard = square metres 1 square mile = square kilometres Other units including historical There are several other common units for area. The are was the original unit of area in the metric system, with: 1 are = 100 square metres Though the are has fallen out of use, the hectare is still commonly used to measure land: 1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres Other uncommon metric units of area include the tetrad, the hectad, and the myriad. The acre is also commonly used to measure land areas, where 1 acre = 4,840 square yards = 43,560 square feet. An acre is approximately 40% of a hectare. On the atomic scale, area is measured in units of barns, such that: 1 barn = 10−28 square meters. The barn is commonly used in describing the cross-sectional area of interaction in nuclear physics. In South Asia (mainly Indians), although the countries use SI units as official, many South Asians still use traditional units. Each administrative division has its own area unit, some of them have same names, but with different values. There's no official consensus about the traditional units values. Thus, the conversions between the SI units and the traditional units may have different results, depending on what reference that has been used. Some traditional South Asian units that have fixed value: 1 Killa = 1 acre 1 Ghumaon = 1 acre 1 Kanal = 0.125 acre (1 acre = 8 kanal) 1 Decimal = 48.4 square yards 1 Chatak = 180 square feet History Circle area In the 5th century BCE, Hippocrates of Chios was the first to show that the area of a disk (the region enclosed by a circle) is proportional to the square of its diameter, as part of his quadrature of the lune of Hippocrates, but did not identify the constant of proportionality. Eudoxus of Cnidus, also in the 5th century BCE, also found that the area of a disk is proportional to its radius squared. Subsequently, Book I of Euclid's Elements dealt with equality of areas between two-dimensional figures. The mathematician Archimedes used the tools of Euclidean geometry to show that the area inside a circle is equal to that of a right triangle whose base has the length of the circle's circumference and whose height equals the circle's radius, in his book Measurement of a Circle. (The circumference is 2r, and the area of a triangle is half the base times the height, yielding the area r2 for the disk.) Archimedes approximated the value of π (and hence the area of a unit-radius circle) with his doubling method, in which he inscribed a regular triangle in a circle and noted its area, then doubled the number of sides to give a regular hexagon, then repeatedly doubled the number of sides as the polygon's area got closer and closer to that of the circle (and did the same with circumscribed polygons). Triangle area Quadrilateral area In the 7th century CE, Brahmagupta developed a formula, now known as Brahmagupta's formula, for the area of a cyclic quadrilateral (a quadrilateral inscribed in a circle) in terms of its sides. In 1842, the German mathematicians Carl Anton Bretschneider and Karl Georg Christian von Staudt independently found a formula, known as Bretschneider's formula, for the area of any quadrilateral. General polygon area The development of Cartesian coordinates by René Descartes in the 17th century allowed the development of the surveyor's formula for the area of any polygon with known vertex locations by Gauss in the 19th century. Areas determined using calculus The development of integral calculus in the late 17th century provided tools that could subsequently be used for computing more complicated areas, such as the area of an ellipse and the surface areas of various curved three-dimensional objects. Area formulas Polygon formulas For a non-self-intersecting (simple) polygon, the Cartesian coordinates (i=0, 1, ..., n-1) of whose n vertices are known, the area is given by the surveyor's formula: where when i=n-1, then i+1 is expressed as modulus n and so refers to 0. Rectangles The most basic area formula is the formula for the area of a rectangle. Given a rectangle with length and width , the formula for the area is: (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as in the case of a square, the area of a square with side length is given by the formula: (square). The formula for the area of a rectangle follows directly from the basic properties of area, and is sometimes taken as a definition or axiom. On the other hand, if geometry is developed before arithmetic, this formula can be used to define multiplication of real numbers. Dissection, parallelograms, and triangles Most other simple formulas for area follow from the method of dissection. This involves cutting a shape into pieces, whose areas must sum to the area of the original shape. For an example, any parallelogram can be subdivided into a trapezoid and a right triangle, as shown in figure to the left. If the triangle is moved to the other side of the trapezoid, then the resulting figure is a rectangle. It follows that the area of the parallelogram is the same as the area of the rectangle: (parallelogram). However, the same parallelogram can also be cut along a diagonal into two congruent triangles, as shown in the figure to the right. It follows that the area of each triangle is half the area of the parallelogram: (triangle). Similar arguments can be used to find area formulas for the trapezoid as well as more complicated polygons. Area of curved shapes Circles The formula for the area of a circle (more properly called the area enclosed by a circle or the area of a disk) is based on a similar method. Given a circle of radius , it is possible to partition the circle into sectors, as shown in the figure to the right. Each sector is approximately triangular in shape, and the sectors can be rearranged to form an approximate parallelogram. The height of this parallelogram is , and the width is half the circumference of the circle, or . Thus, the total area of the circle is : (circle). Though the dissection used in this formula is only approximate, the error becomes smaller and smaller as the circle is partitioned into more and more sectors. The limit of the areas of the approximate parallelograms is exactly , which is the area of the circle. This argument is actually a simple application of the ideas of calculus. In ancient times, the method of exhaustion was used in a similar way to find the area of the circle, and this method is now recognized as a precursor to integral calculus. Using modern methods, the area of a circle can be computed using a definite integral: Ellipses The formula for the area enclosed by an ellipse is related to the formula of a circle; for an ellipse with semi-major and semi-minor axes and the formula is: Non-planar surface area Most basic formulas for surface area can be obtained by cutting surfaces and flattening them out (see: developable surfaces). For example, if the side surface of a cylinder (or any prism) is cut lengthwise, the surface can be flattened out into a rectangle. Similarly, if a cut is made along the side of a cone, the side surface can be flattened out into a sector of a circle, and the resulting area computed. The formula for the surface area of a sphere is more difficult to derive: because a sphere has nonzero Gaussian curvature, it cannot be flattened out. The formula for the surface area of a sphere was first obtained by Archimedes in his work On the Sphere and Cylinder. The formula is: (sphere), where is the radius of the sphere. As with the formula for the area of a circle, any derivation of this formula inherently uses methods similar to calculus. General formulas Areas of 2-dimensional figures A triangle: (where B is any side, and h is the distance from the line on which B lies to the other vertex of the triangle). This formula can be used if the height h is known. If the lengths of the three sides are known then Heron's formula can be used: where a, b, c are the sides of the triangle, and is half of its perimeter. If an angle and its two included sides are given, the area is where is the given angle and and are its included sides. If the triangle is graphed on a coordinate plane, a matrix can be used and is simplified to the absolute value of . This formula is also known as the shoelace formula and is an easy way to solve for the area of a coordinate triangle by substituting the 3 points (x1,y1), (x2,y2), and (x3,y3). The shoelace formula can also be used to find the areas of other polygons when their vertices are known. Another approach for a coordinate triangle is to use calculus to find the area. A simple polygon constructed on a grid of equal-distanced points (i.e., points with integer coordinates) such that all the polygon's vertices are grid points: , where i is the number of grid points inside the polygon and b is the number of boundary points. This result is known as Pick's theorem. Area in calculus The area between a positive-valued curve and the horizontal axis, measured between two values a and b (b is defined as the larger of the two values) on the horizontal axis, is given by the integral from a to b of the function that represents the curve: The area between the graphs of two functions is equal to the integral of one function, f(x), minus the integral of the other function, g(x): where is the curve with the greater y-value. An area bounded by a function expressed in polar coordinates is: The area enclosed by a parametric curve with endpoints is given by the line integrals: or the z-component of (For details, see .) This is the principle of the planimeter mechanical device. Bounded area between two quadratic functions To find the bounded area between two quadratic functions, we subtract one from the other to write the difference as where f(x) is the quadratic upper bound and g(x) is the quadratic lower bound. Define the discriminant of f(x)-g(x) as By simplifying the integral formula between the graphs of two functions (as given in the section above) and using Vieta's formula, we can obtain The above remains valid if one of the bounding functions is linear instead of quadratic. Surface area of 3-dimensional figures Cone: , where r is the radius of the circular base, and h is the height. That can also be rewritten as or where r is the radius and l is the slant height of the cone. is the base area while is the lateral surface area of the cone. Cube: , where s is the length of an edge. Cylinder: , where r is the radius of a base and h is the height. The can also be rewritten as , where d is the diameter. Prism: , where B is the area of a base, P is the perimeter of a base, and h is the height of the prism. pyramid: , where B is the area of the base, P is the perimeter of the base, and L is the length of the slant. Rectangular prism: , where is the length, w is the width, and h is the height. General formula for surface area The general formula for the surface area of the graph of a continuously differentiable function where and is a region in the xy-plane with the smooth boundary: An even more general formula for the area of the graph of a parametric surface in the vector form where is a continuously differentiable vector function of is: List of formulas The above calculations show how to find the areas of many common shapes. The areas of irregular (and thus arbitrary) polygons can be calculated using the "Surveyor's formula" (shoelace formula). Relation of area to perimeter The isoperimetric inequality states that, for a closed curve of length L (so the region it encloses has perimeter L) and for area A of the region that it encloses, and equality holds if and only if the curve is a circle. Thus a circle has the largest area of any closed figure with a given perimeter. At the other extreme, a figure with given perimeter L could have an arbitrarily small area, as illustrated by a rhombus that is "tipped over" arbitrarily far so that two of its angles are arbitrarily close to 0° and the other two are arbitrarily close to 180°. For a circle, the ratio of the area to the circumference (the term for the perimeter of a circle) equals half the radius r. This can be seen from the area formula πr2 and the circumference formula 2πr. The area of a regular polygon is half its perimeter times the apothem (where the apothem is the distance from the center to the nearest point on any side). Fractals Doubling the edge lengths of a polygon multiplies its area by four, which is two (the ratio of the new to the old side length) raised to the power of two (the dimension of the space the polygon resides in). But if the one-dimensional lengths of a fractal drawn in two dimensions are all doubled, the spatial content of the fractal scales by a power of two that is not necessarily an integer. This power is called the fractal dimension of the fractal. Area bisectors There are an infinitude of lines that bisect the area of a triangle. Three of them are the medians of the triangle (which connect the sides' midpoints with the opposite vertices), and these are concurrent at the triangle's centroid; indeed, they are the only area bisectors that go through the centroid. Any line through a triangle that splits both the triangle's area and its perimeter in half goes through the triangle's incenter (the center of its incircle). There are either one, two, or three of these for any given triangle. Any line through the midpoint of a parallelogram bisects the area. All area bisectors of a circle or other ellipse go through the center, and any chords through the center bisect the area. In the case of a circle they are the diameters of the circle. Optimization Given a wire contour, the surface of least area spanning ("filling") it is a minimal surface. Familiar examples include soap bubbles. The question of the filling area of the Riemannian circle remains open. The circle has the largest area of any two-dimensional object having the same perimeter. A cyclic polygon (one inscribed in a circle) has the largest area of any polygon with a given number of sides of the same lengths. A version of the isoperimetric inequality for triangles states that the triangle of greatest area among all those with a given perimeter is equilateral. The triangle of largest area of all those inscribed in a given circle is equilateral; and the triangle of smallest area of all those circumscribed around a given circle is equilateral. The ratio of the area of the incircle to the area of an equilateral triangle, , is larger than that of any non-equilateral triangle. The ratio of the area to the square of the perimeter of an equilateral triangle, is larger than that for any other triangle. See also Brahmagupta quadrilateral, a cyclic quadrilateral with integer sides, integer diagonals, and integer area. Equiareal map Heronian triangle, a triangle with integer sides and integer area. List of triangle inequalities One-seventh area triangle, an inner triangle with one-seventh the area of the reference triangle. Routh's theorem, a generalization of the one-seventh area triangle. Orders of magnitude—A list of areas by size. Derivation of the formula of a pentagon Planimeter, an instrument for measuring small areas, e.g. on maps. Area of a convex quadrilateral Robbins pentagon, a cyclic pentagon whose side lengths and area are all rational numbers. References External links	5
The astronomical unit (symbol: au, or or AU) is a unit of length, roughly the distance from Earth to the Sun and approximately equal to or 8.3 light-minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once each year. The astronomical unit was originally conceived as the average of Earth's aphelion and perihelion; however, since 2012 it has been defined as exactly . The astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the definition of another unit of astronomical length, the parsec. History of symbol usage A variety of unit symbols and abbreviations have been in use for the astronomical unit. In a 1976 resolution, the International Astronomical Union (IAU) had used the symbol A to denote a length equal to the astronomical unit. In the astronomical literature, the symbol AU was (and remains) common. In 2006, the International Bureau of Weights and Measures (BIPM) had recommended ua as the symbol for the unit, from the French "unité astronomique". In the non-normative Annex C to ISO 80000-3:2006 (now withdrawn), the symbol of the astronomical unit was also ua. In 2012, the IAU, noting "that various symbols are presently in use for the astronomical unit", recommended the use of the symbol "au". The scientific journals published by the American Astronomical Society and the Royal Astronomical Society subsequently adopted this symbol. In the 2014 revision and 2019 edition of the SI Brochure, the BIPM used the unit symbol "au". ISO 80000-3:2019, which replaces ISO 80000-3:2006, does not mention the astronomical unit. Development of unit definition Earth's orbit around the Sun is an ellipse. The semi-major axis of this elliptic orbit is defined to be half of the straight line segment that joins the perihelion and aphelion. The centre of the Sun lies on this straight line segment, but not at its midpoint. Because ellipses are well-understood shapes, measuring the points of its extremes defined the exact shape mathematically, and made possible calculations for the entire orbit as well as predictions based on observation. In addition, it mapped out exactly the largest straight-line distance that Earth traverses over the course of a year, defining times and places for observing the largest parallax (apparent shifts of position) in nearby stars. Knowing Earth's shift and a star's shift enabled the star's distance to be calculated. But all measurements are subject to some degree of error or uncertainty, and the uncertainties in the length of the astronomical unit only increased uncertainties in the stellar distances. Improvements in precision have always been a key to improving astronomical understanding. Throughout the twentieth century, measurements became increasingly precise and sophisticated, and ever more dependent on accurate observation of the effects described by Einstein's theory of relativity and upon the mathematical tools it used. Improving measurements were continually checked and cross-checked by means of improved understanding of the laws of celestial mechanics, which govern the motions of objects in space. The expected positions and distances of objects at an established time are calculated (in au) from these laws, and assembled into a collection of data called an ephemeris. NASA Jet Propulsion Laboratory HORIZONS System provides one of several ephemeris computation services. In 1976, to establish an even precise measure for the astronomical unit, the IAU formally adopted a new definition. Although directly based on the then-best available observational measurements, the definition was recast in terms of the then-best mathematical derivations from celestial mechanics and planetary ephemerides. It stated that "the astronomical unit of length is that length (A) for which the Gaussian gravitational constant (k) takes the value when the units of measurement are the astronomical units of length, mass and time". Equivalently, by this definition, one au is "the radius of an unperturbed circular Newtonian orbit about the sun of a particle having infinitesimal mass, moving with an angular frequency of "; or alternatively that length for which the heliocentric gravitational constant (the product G) is equal to ()2 au3/d2, when the length is used to describe the positions of objects in the Solar System. Subsequent explorations of the Solar System by space probes made it possible to obtain precise measurements of the relative positions of the inner planets and other objects by means of radar and telemetry. As with all radar measurements, these rely on measuring the time taken for photons to be reflected from an object. Because all photons move at the speed of light in vacuum, a fundamental constant of the universe, the distance of an object from the probe is calculated as the product of the speed of light and the measured time. However, for precision the calculations require adjustment for things such as the motions of the probe and object while the photons are transiting. In addition, the measurement of the time itself must be translated to a standard scale that accounts for relativistic time dilation. Comparison of the ephemeris positions with time measurements expressed in Barycentric Dynamical Time (TDB) leads to a value for the speed of light in astronomical units per day (of ). By 2009, the IAU had updated its standard measures to reflect improvements, and calculated the speed of light at (TDB). In 1983, the CIPM modified the International System of Units (SI) to make the metre defined as the distance travelled in a vacuum by light in 1 / second. This replaced the previous definition, valid between 1960 and 1983, which was that the metre equalled a certain number of wavelengths of a certain emission line of krypton-86. (The reason for the change was an improved method of measuring the speed of light.) The speed of light could then be expressed exactly as c0 = , a standard also adopted by the IERS numerical standards. From this definition and the 2009 IAU standard, the time for light to traverse an astronomical unit is found to be τA = , which is slightly more than 8 minutes 19 seconds. By multiplication, the best IAU 2009 estimate was A = c0τA = , based on a comparison of Jet Propulsion Laboratory and IAA–RAS ephemerides. In 2006, the BIPM reported a value of the astronomical unit as . In the 2014 revision of the SI Brochure, the BIPM recognised the IAU's 2012 redefinition of the astronomical unit as . This estimate was still derived from observation and measurements subject to error, and based on techniques that did not yet standardize all relativistic effects, and thus were not constant for all observers. In 2012, finding that the equalization of relativity alone would make the definition overly complex, the IAU simply used the 2009 estimate to redefine the astronomical unit as a conventional unit of length directly tied to the metre (exactly ). The new definition also recognizes as a consequence that the astronomical unit is now to play a role of reduced importance, limited in its use to that of a convenience in some applications. {\| style="border-spacing:0" \|- \|rowspan=7 style="vertical-align:top; padding-right:0"\|1 astronomical unit \|= metres (by definition) \|- \|= (exactly) \|- \|≈ \|- \|≈ light-seconds \|- \|≈ \|- \|≈ \|} This definition makes the speed of light, defined as exactly , equal to exactly × ÷ or about au/d, some 60 parts per trillion less than the 2009 estimate. Usage and significance With the definitions used before 2012, the astronomical unit was dependent on the heliocentric gravitational constant, that is the product of the gravitational constant, G, and the solar mass, . Neither G nor can be measured to high accuracy separately, but the value of their product is known very precisely from observing the relative positions of planets (Kepler's third law expressed in terms of Newtonian gravitation). Only the product is required to calculate planetary positions for an ephemeris, so ephemerides are calculated in astronomical units and not in SI units. The calculation of ephemerides also requires a consideration of the effects of general relativity. In particular, time intervals measured on Earth's surface (Terrestrial Time, TT) are not constant when compared with the motions of the planets: the terrestrial second (TT) appears to be longer near January and shorter near July when compared with the "planetary second" (conventionally measured in TDB). This is because the distance between Earth and the Sun is not fixed (it varies between and ) and, when Earth is closer to the Sun (perihelion), the Sun's gravitational field is stronger and Earth is moving faster along its orbital path. As the metre is defined in terms of the second and the speed of light is constant for all observers, the terrestrial metre appears to change in length compared with the "planetary metre" on a periodic basis. The metre is defined to be a unit of proper length. Indeed, the International Committee for Weights and Measures (CIPM) notes that "its definition applies only within a spatial extent sufficiently small that the effects of the non-uniformity of the gravitational field can be ignored". As such, a distance within the Solar System without specifying the frame of reference for the measurement is problematic. The 1976 definition of the astronomical unit was incomplete because it did not specify the frame of reference in which to apply the measurement, but proved practical for the calculation of ephemerides: a fuller definition that is consistent with general relativity was proposed, and "vigorous debate" ensued until August 2012 when the IAU adopted the current definition of 1 astronomical unit = metres. The astronomical unit is typically used for stellar system scale distances, such as the size of a protostellar disk or the heliocentric distance of an asteroid, whereas other units are used for other distances in astronomy. The astronomical unit is too small to be convenient for interstellar distances, where the parsec and light-year are widely used. The parsec (parallax arcsecond) is defined in terms of the astronomical unit, being the distance of an object with a parallax of . The light-year is often used in popular works, but is not an approved non-SI unit and is rarely used by professional astronomers. When simulating a numerical model of the Solar System, the astronomical unit provides an appropriate scale that minimizes (overflow, underflow and truncation) errors in floating point calculations. History The book On the Sizes and Distances of the Sun and Moon, which is ascribed to Aristarchus, says the distance to the Sun is 18 to 20 times the distance to the Moon, whereas the true ratio is about . The latter estimate was based on the angle between the half-moon and the Sun, which he estimated as (the true value being close to ). Depending on the distance that van Helden assumes Aristarchus used for the distance to the Moon, his calculated distance to the Sun would fall between and Earth radii. According to Eusebius in the Praeparatio evangelica (Book XV, Chapter 53), Eratosthenes found the distance to the Sun to be "σταδιων μυριαδας τετρακοσιας και οκτωκισμυριας" (literally "of stadia myriads 400 and ) but with the additional note that in the Greek text the grammatical agreement is between myriads (not stadia) on the one hand and both 400 and on the other, as in Greek, unlike English, all three (or all four if one were to include stadia) words are inflected. This has been translated either as stadia (1903 translation by Edwin Hamilton Gifford), or as stadia (edition of , dated 1974–1991). Using the Greek stadium of 185 to 190 metres, the former translation comes to to , which is far too low, whereas the second translation comes to 148.7 to 152.8 million kilometres (accurate within 2%). Hipparchus also gave an estimate of the distance of Earth from the Sun, quoted by Pappus as equal to 490 Earth radii. According to the conjectural reconstructions of Noel Swerdlow and G. J. Toomer, this was derived from his assumption of a "least perceptible" solar parallax of . A Chinese mathematical treatise, the Zhoubi Suanjing (), shows how the distance to the Sun can be computed geometrically, using the different lengths of the noontime shadows observed at three places li apart and the assumption that Earth is flat. In the 2nd century CE, Ptolemy estimated the mean distance of the Sun as times Earth's radius. To determine this value, Ptolemy started by measuring the Moon's parallax, finding what amounted to a horizontal lunar parallax of 1° 26′, which was much too large. He then derived a maximum lunar distance of Earth radii. Because of cancelling errors in his parallax figure, his theory of the Moon's orbit, and other factors, this figure was approximately correct. He then measured the apparent sizes of the Sun and the Moon and concluded that the apparent diameter of the Sun was equal to the apparent diameter of the Moon at the Moon's greatest distance, and from records of lunar eclipses, he estimated this apparent diameter, as well as the apparent diameter of the shadow cone of Earth traversed by the Moon during a lunar eclipse. Given these data, the distance of the Sun from Earth can be trigonometrically computed to be Earth radii. This gives a ratio of solar to lunar distance of approximately 19, matching Aristarchus's figure. Although Ptolemy's procedure is theoretically workable, it is very sensitive to small changes in the data, so much so that changing a measurement by a few per cent can make the solar distance infinite. After Greek astronomy was transmitted to the medieval Islamic world, astronomers made some changes to Ptolemy's cosmological model, but did not greatly change his estimate of the Earth–Sun distance. For example, in his introduction to Ptolemaic astronomy, al-Farghānī gave a mean solar distance of Earth radii, whereas in his zij, al-Battānī used a mean solar distance of Earth radii. Subsequent astronomers, such as al-Bīrūnī, used similar values. Later in Europe, Copernicus and Tycho Brahe also used comparable figures ( and Earth radii), and so Ptolemy's approximate Earth–Sun distance survived through the 16th century. Johannes Kepler was the first to realize that Ptolemy's estimate must be significantly too low (according to Kepler, at least by a factor of three) in his Rudolphine Tables (1627). Kepler's laws of planetary motion allowed astronomers to calculate the relative distances of the planets from the Sun, and rekindled interest in measuring the absolute value for Earth (which could then be applied to the other planets). The invention of the telescope allowed far more accurate measurements of angles than is possible with the naked eye. Flemish astronomer Godefroy Wendelin repeated Aristarchus’ measurements in 1635, and found that Ptolemy's value was too low by a factor of at least eleven. A somewhat more accurate estimate can be obtained by observing the transit of Venus. By measuring the transit in two different locations, one can accurately calculate the parallax of Venus and from the relative distance of Earth and Venus from the Sun, the solar parallax (which cannot be measured directly due to the brightness of the Sun). Jeremiah Horrocks had attempted to produce an estimate based on his observation of the 1639 transit (published in 1662), giving a solar parallax of , similar to Wendelin's figure. The solar parallax is related to the Earth–Sun distance as measured in Earth radii by The smaller the solar parallax, the greater the distance between the Sun and Earth: a solar parallax of is equivalent to an Earth–Sun distance of Earth radii. Christiaan Huygens believed that the distance was even greater: by comparing the apparent sizes of Venus and Mars, he estimated a value of about Earth radii, equivalent to a solar parallax of . Although Huygens' estimate is remarkably close to modern values, it is often discounted by historians of astronomy because of the many unproven (and incorrect) assumptions he had to make for his method to work; the accuracy of his value seems to be based more on luck than good measurement, with his various errors cancelling each other out. Jean Richer and Giovanni Domenico Cassini measured the parallax of Mars between Paris and Cayenne in French Guiana when Mars was at its closest to Earth in 1672. They arrived at a figure for the solar parallax of , equivalent to an Earth–Sun distance of about Earth radii. They were also the first astronomers to have access to an accurate and reliable value for the radius of Earth, which had been measured by their colleague Jean Picard in 1669 as toises. This same year saw another estimate for the astronomical unit by John Flamsteed, which accomplished it alone by measuring the martian diurnal parallax. Another colleague, Ole Rømer, discovered the finite speed of light in 1676: the speed was so great that it was usually quoted as the time required for light to travel from the Sun to the Earth, or "light time per unit distance", a convention that is still followed by astronomers today. A better method for observing Venus transits was devised by James Gregory and published in his Optica Promata (1663). It was strongly advocated by Edmond Halley and was applied to the transits of Venus observed in 1761 and 1769, and then again in 1874 and 1882. Transits of Venus occur in pairs, but less than one pair every century, and observing the transits in 1761 and 1769 was an unprecedented international scientific operation including observations by James Cook and Charles Green from Tahiti. Despite the Seven Years' War, dozens of astronomers were dispatched to observing points around the world at great expense and personal danger: several of them died in the endeavour. The various results were collated by Jérôme Lalande to give a figure for the solar parallax of . Karl Rudolph Powalky had made an estimate of in 1864. Another method involved determining the constant of aberration. Simon Newcomb gave great weight to this method when deriving his widely accepted value of for the solar parallax (close to the modern value of ), although Newcomb also used data from the transits of Venus. Newcomb also collaborated with A. A. Michelson to measure the speed of light with Earth-based equipment; combined with the constant of aberration (which is related to the light time per unit distance), this gave the first direct measurement of the Earth–Sun distance in kilometres. Newcomb's value for the solar parallax (and for the constant of aberration and the Gaussian gravitational constant) were incorporated into the first international system of astronomical constants in 1896, which remained in place for the calculation of ephemerides until 1964. The name "astronomical unit" appears first to have been used in 1903. The discovery of the near-Earth asteroid 433 Eros and its passage near Earth in 1900–1901 allowed a considerable improvement in parallax measurement. Another international project to measure the parallax of 433 Eros was undertaken in 1930–1931. Direct radar measurements of the distances to Venus and Mars became available in the early 1960s. Along with improved measurements of the speed of light, these showed that Newcomb's values for the solar parallax and the constant of aberration were inconsistent with one another. Developments The unit distance (the value of the astronomical unit in metres) can be expressed in terms of other astronomical constants: where is the Newtonian constant of gravitation, is the solar mass, is the numerical value of Gaussian gravitational constant and is the time period of one day. The Sun is constantly losing mass by radiating away energy, so the orbits of the planets are steadily expanding outward from the Sun. This has led to calls to abandon the astronomical unit as a unit of measurement. As the speed of light has an exact defined value in SI units and the Gaussian gravitational constant is fixed in the astronomical system of units, measuring the light time per unit distance is exactly equivalent to measuring the product × in SI units. Hence, it is possible to construct ephemerides entirely in SI units, which is increasingly becoming the norm. A 2004 analysis of radiometric measurements in the inner Solar System suggested that the secular increase in the unit distance was much larger than can be accounted for by solar radiation, + metres per century. The measurements of the secular variations of the astronomical unit are not confirmed by other authors and are quite controversial. Furthermore, since 2010, the astronomical unit has not been estimated by the planetary ephemerides. Examples The following table contains some distances given in astronomical units. It includes some examples with distances that are normally not given in astronomical units, because they are either too short or far too long. Distances normally change over time. Examples are listed by increasing distance. See also Orders of magnitude (length) References Further reading External links The IAU and astronomical units Recommendations concerning Units (HTML version of the IAU Style Manual) Chasing Venus, Observing the Transits of Venus Transit of Venus Celestial mechanics Unit Units of length	5
Anglicanism is a Western Christian tradition that has developed from the practices, liturgy, and identity of the Church of England following the English Reformation, in the context of the Protestant Reformation in Europe. It is one of the largest branches of Christianity, with around 110 million adherents worldwide . Adherents of Anglicanism are called Anglicans; they are also called Episcopalians in some countries. The majority of Anglicans are members of national or regional ecclesiastical provinces of the international Anglican Communion, which forms the third-largest Christian communion in the world, after the Roman Catholic Church and the Eastern Orthodox Church. These provinces are in full communion with the See of Canterbury and thus with the Archbishop of Canterbury, whom the communion refers to as its primus inter pares (Latin, 'first among equals'). The Archbishop calls the decennial Lambeth Conference, chairs the meeting of primates, and is the president of the Anglican Consultative Council. Some churches that are not part of the Anglican Communion or recognised by it also call themselves Anglican, including those that are within the Continuing Anglican movement and Anglican realignment. Anglicans base their Christian faith on the Bible, traditions of the apostolic church, apostolic succession ("historic episcopate"), and the writings of the Church Fathers. Anglicanism forms one of the branches of Western Christianity, having definitively declared its independence from the Holy See at the time of the Elizabethan Religious Settlement. Many of the new Anglican formularies of the mid-16th century corresponded closely to those of historical Protestantism. These reforms in the Church of England were understood by one of those most responsible for them, Thomas Cranmer, the Archbishop of Canterbury, and others as navigating a middle way between two of the emerging Protestant traditions, namely Lutheranism and Calvinism. In the first half of the 17th century, the Church of England and its associated Church of Ireland were presented by some Anglican divines as comprising a distinct Christian tradition, with theologies, structures, and forms of worship representing a different kind of middle way, or via media, between Protestantism and Catholicism – a perspective that came to be highly influential in later theories of Anglican identity and expressed in the description of Anglicanism as "catholic and reformed". The degree of distinction between Protestant and Catholic tendencies within the Anglican tradition is routinely a matter of debate both within specific Anglican churches and throughout the Anglican Communion. Unique to Anglicanism is the Book of Common Prayer, the collection of services in one prayer book used for centuries. The book is acknowledged as a principal tie which binds the Anglican Communion together as a liturgical rather than a confessional tradition, or one which claims to possess a formal magisterium, as in the Roman Catholic Church. After the American Revolution, Anglican congregations in the United States and British North America (which would later form the basis for the modern country of Canada) were each reconstituted into autonomous churches with their own bishops and self-governing structures; these were known as the American Episcopal Church and the Church of England in the Dominion of Canada. Through the expansion of the British Empire and the activity of Christian missions, this model was adopted as the model for many newly formed churches, especially in Africa, Australasia, and the Asia-Pacific. In the 19th century, the term Anglicanism was coined to describe the common religious tradition of these churches and also that of the Scottish Episcopal Church, which, though originating earlier within the Church of Scotland, had come to be recognised as sharing this common identity. Terminology The word Anglican originates in , a phrase from Magna Carta dated 15 June 1215, meaning 'the Anglican Church shall be free'. Adherents of Anglicanism are called Anglicans. As an adjective, Anglican is used to describe the people, institutions, and churches, as well as the liturgical traditions and theological concepts developed by the Church of England. As a noun, an Anglican is a member of a church in the Anglican Communion. The word is also used by followers of separated groups that have left the communion or have been founded separately from it, although this is considered a misuse by the Anglican Communion. The word Anglicanism came into being in the 19th century. The word originally referred only to the teachings and rites of Christians throughout the world in communion with the see of Canterbury but has come to sometimes be extended to any church following those traditions rather than actual membership in the modern Anglican Communion. Although the term Anglican is found referring to the Church of England as far back as the 16th century, its use did not become general until the latter half of the 19th century. In British parliamentary legislation referring to the English Established Church, there is no need for a description; it is simply the Church of England, though the word Protestant is used in many legal acts specifying the succession to the Crown and qualifications for office. When the Union with Ireland Act created the United Church of England and Ireland, it is specified that it shall be one "Protestant Episcopal Church", thereby distinguishing its form of church government from the Presbyterian polity that prevails in the Church of Scotland. The word Episcopal is preferred in the title of the Episcopal Church (the province of the Anglican Communion covering the United States) and the Scottish Episcopal Church, though the full name of the former is The Protestant Episcopal Church in the United States of America. Elsewhere, however, the term Anglican Church came to be preferred as it distinguished these churches from others that maintain an episcopal polity. Definition Anglicanism, in its structures, theology, and forms of worship, is commonly understood as a distinct Christian tradition representing a middle ground between what are perceived to be the extremes of the claims of 16th-century Roman Catholicism and the Lutheran and Reformed varieties of Protestantism of that era. As such, it is often referred to as being a via media ('middle way') between these traditions. The faith of Anglicans is founded in the Scriptures and the Gospels, the traditions of the Apostolic Church, the historical episcopate, the first four ecumenical councils, and the early Church Fathers (among these councils, especially the premier four ones, and among these Fathers, especially those active during the five initial centuries of Christianity, according to the quinquasaecularist principle proposed by the English bishop Lancelot Andrewes and the Lutheran dissident Georg Calixtus). Anglicans understand the Old and New Testaments as "containing all things necessary for salvation" and as being the rule and ultimate standard of faith. Reason and tradition are seen as valuable means to interpret scripture (a position first formulated in detail by Richard Hooker), but there is no full mutual agreement among Anglicans about exactly how scripture, reason, and tradition interact (or ought to interact) with each other. Anglicans understand the Apostles' Creed as the baptismal symbol and the Nicene Creed as the sufficient statement of the Christian faith. Anglicans believe the catholic and apostolic faith is revealed in Holy Scripture and the Catholic creeds and interpret these in light of the Christian tradition of the historic church, scholarship, reason, and experience. Anglicans celebrate the traditional sacraments, with special emphasis being given to the Eucharist, also called Holy Communion, the Lord's Supper, or the Mass. The Eucharist is central to worship for most Anglicans as a communal offering of prayer and praise in which the life, death, and resurrection of Jesus Christ are proclaimed through prayer, reading of the Bible, singing, giving God thanks over the bread and wine for the innumerable benefits obtained through the passion of Christ, the breaking of the bread, the blessing of the cup, and the partaking of the body and blood of Christ as instituted at the Last Supper. The consecrated bread and wine, which are the true body and blood of Christ in a spiritual manner, are outward symbols of an inner grace given by Christ, which to the repentant conveys forgiveness and cleansing from sin. While many Anglicans celebrate the Eucharist in similar ways to the predominant Latin Catholic tradition, a considerable degree of liturgical freedom is permitted, and worship styles range from simple to elaborate. Unique to Anglicanism is the Book of Common Prayer (BCP), the collection of services that worshippers in most Anglican churches have used for centuries. It was called common prayer originally because it was intended for use in all Church of England churches, which had previously followed differing local liturgies. The term was kept when the church became international because all Anglicans used to share in its use around the world. In 1549, the first Book of Common Prayer was compiled by Thomas Cranmer, who was then Archbishop of Canterbury. While it has since undergone many revisions and Anglican churches in different countries have developed other service books, the Prayer Book is still acknowledged as one of the ties that bind Anglicans together. Identity Early history The founding of Christianity in Britain is commonly attributed to Joseph of Arimathea, according to Anglican legend, and is commemorated in Glastonbury Abbey. Many of the early Church Fathers wrote of the presence of Christianity in Roman Britain, with Tertullian stating "those parts of Britain into which the Roman arms had never penetrated were become subject to Christ". Saint Alban, who was executed in AD 209, is the first Christian martyr in the British Isles. For this reason he is venerated as the British protomartyr. The historian Heinrich Zimmer writes that "Just as Britain was a part of the Roman Empire, so the British Church formed (during the fourth century) a branch of the Catholic Church of the West; and during the whole of that century, from the Council of Arles (316) onward, took part in all proceedings concerning the Church." After Roman troops withdrew from Britain, the "absence of Roman military and governmental influence and overall decline of Roman imperial political power enabled Britain and the surrounding isles to develop distinctively from the rest of the West. A new culture emerged around the Irish Sea among the Celtic peoples with Celtic Christianity at its core. What resulted was a form of Christianity distinct from Rome in many traditions and practices." The historian Charles Thomas, in addition to the Celticist Heinrich Zimmer, writes that the distinction between sub-Roman and post-Roman Insular Christianity, also known as Celtic Christianity, began to become apparent around AD 475, with the Celtic churches allowing married clergy, observing Lent and Easter according to their own calendar, and having a different tonsure; moreover, like the Eastern Orthodox and the Oriental Orthodox Churches, the Celtic churches operated independently of the Pope's authority, as a result of their isolated development in the British Isles. In what is known as the Gregorian mission, Pope Gregory I sent Augustine of Canterbury to the British Isles in AD 596, with the purpose of evangelising the pagans there (who were largely Anglo-Saxons), as well as to reconcile the Celtic churches in the British Isles to the See of Rome. In Kent, Augustine persuaded the Anglo-Saxon king "Æthelberht and his people to accept Christianity". Augustine, on two occasions, "met in conference with members of the Celtic episcopacy, but no understanding was reached between them." Eventually, the "Christian Church of the Anglo-Saxon kingdom of Northumbria convened the Synod of Whitby in 663/664 to decide whether to follow Celtic or Roman usages." This meeting, with King Oswiu as the final decision maker, "led to the acceptance of Roman usage elsewhere in England and brought the English Church into close contact with the Continent". As a result of assuming Roman usages, the Celtic Church surrendered its independence, and, from this point on, the Church in England "was no longer purely Celtic, but became Anglo-Roman-Celtic". The theologian Christopher L. Webber writes that, although "the Roman form of Christianity became the dominant influence in Britain as in all of western Europe, Anglican Christianity has continued to have a distinctive quality because of its Celtic heritage." The Church in England remained united with Rome until the English Parliament, through the Act of Supremacy (1534), declared King Henry VIII to be the Supreme Head of the Church of England to fulfill the "English desire to be independent from continental Europe religiously and politically." As the change was mostly political, done in order to allow for the annulment of Henry VIII's marriage, the English Church under Henry VIII continued to maintain Roman Catholic doctrines and the sacraments despite the separation from Rome. With little exception, Henry VIII allowed no changes during his lifetime. Under King Edward VI (1547–1553), however, the church in England underwent what is known as the English Reformation, in the course of which it acquired a number of characteristics that would subsequently become recognised as constituting its distinctive "Anglican" identity. Development With the Elizabethan Settlement of 1559, the Protestant identity of the English and Irish churches was affirmed by means of parliamentary legislation which mandated allegiance and loyalty to the English Crown in all their members. The Elizabethan church began to develop distinct religious traditions, assimilating some of the theology of Reformed churches with the services in the Book of Common Prayer (which drew extensively on the Sarum Rite native to England), under the leadership and organisation of a continuing episcopate. Over the years, these traditions themselves came to command adherence and loyalty. The Elizabethan Settlement stopped the radical Protestant tendencies under Edward VI by combining the more radical elements of the 1552 prayer book with the conservative "Catholic" 1549 prayer book into the 1559 Book of Common Prayer. From then on, Protestantism was in a "state of arrested development", regardless of the attempts to detach the Church of England from its "idiosyncratic anchorage in the medieval past" by various groups which tried to push it towards a more Reformed theology and governance in the years 1560–1660. Although two important constitutive elements of what later would emerge as Anglicanism were present in 1559 – scripture, the historic episcopate, the Book of Common Prayer, the teachings of the First Four Ecumenical Councils as the yardstick of catholicity, the teaching of the Church Fathers and Catholic bishops, and informed reason – neither the laypeople nor the clergy perceived themselves as Anglicans at the beginning of Elizabeth I's reign, as there was no such identity. Neither does the term via media appear until the 1627 to describe a church which refused to identify itself definitely as Catholic or Protestant, or as both, "and had decided in the end that this is virtue rather than a handicap". Historical studies on the period 1560–1660 written before the late 1960s tended to project the predominant conformist spirituality and doctrine of the 1660s on the ecclesiastical situation one hundred years before, and there was also a tendency to take polemically binary partitions of reality claimed by contestants studied (such as the dichotomies Protestant-"Popish" or "Laudian"-"Puritan") at face value. Since the late 1960s, these interpretations have been criticised. Studies on the subject written during the last forty-five years have, however, not reached any consensus on how to interpret this period in English church history. The extent to which one or several positions concerning doctrine and spirituality existed alongside the more well-known and articulate Puritan movement and the Durham House Party, and the exact extent of continental Calvinism among the English elite and among the ordinary churchgoers from the 1560s to the 1620s are subjects of current and ongoing debate. In 1662, under King Charles II, a revised Book of Common Prayer was produced, which was acceptable to high churchmen as well as some Puritans, and is still considered authoritative to this day. In so far as Anglicans derived their identity from both parliamentary legislation and ecclesiastical tradition, a crisis of identity could result wherever secular and religious loyalties came into conflict – and such a crisis indeed occurred in 1776 with the American Declaration of Independence, most of whose signatories were, at least nominally, Anglican. For these American patriots, even the forms of Anglican services were in doubt, since the Prayer Book rites of Matins, Evensong, and Holy Communion all included specific prayers for the British Royal Family. Consequently, the conclusion of the War of Independence eventually resulted in the creation of two new Anglican churches, the Episcopal Church in the United States in those states that had achieved independence; and in the 1830s The Church of England in Canada became independent from the Church of England in those North American colonies which had remained under British control and to which many Loyalist churchmen had migrated. Reluctantly, legislation was passed in the British Parliament (the Consecration of Bishops Abroad Act 1786) to allow bishops to be consecrated for an American church outside of allegiance to the British Crown (since no dioceses had ever been established in the former American colonies). Both in the United States and in Canada, the new Anglican churches developed novel models of self-government, collective decision-making, and self-supported financing; that would be consistent with separation of religious and secular identities. In the following century, two further factors acted to accelerate the development of a distinct Anglican identity. From 1828 and 1829, Dissenters and Catholics could be elected to the House of Commons, which consequently ceased to be a body drawn purely from the established churches of Scotland, England, and Ireland; but which nevertheless, over the following ten years, engaged in extensive reforming legislation affecting the interests of the English and Irish churches; which, by the Acts of Union of 1800, had been reconstituted as the United Church of England and Ireland. The propriety of this legislation was bitterly contested by the Oxford Movement (Tractarians), who in response developed a vision of Anglicanism as religious tradition deriving ultimately from the ecumenical councils of the patristic church. Those within the Church of England opposed to the Tractarians, and to their revived ritual practices, introduced a stream of bills in parliament aimed to control innovations in worship. This only made the dilemma more acute, with consequent continual litigation in the secular and ecclesiastical courts. Over the same period, Anglican churches engaged vigorously in Christian missions, resulting in the creation, by the end of the century, of over ninety colonial bishoprics, which gradually coalesced into new self-governing churches on the Canadian and American models. However, the case of John Colenso, Bishop of Natal, reinstated in 1865 by the English Judicial Committee of the Privy Council over the heads of the Church in South Africa, demonstrated acutely that the extension of episcopacy had to be accompanied by a recognised Anglican ecclesiology of ecclesiastical authority, distinct from secular power. Consequently, at the instigation of the bishops of Canada and South Africa, the first Lambeth Conference was called in 1867; to be followed by further conferences in 1878 and 1888, and thereafter at ten-year intervals. The various papers and declarations of successive Lambeth Conferences have served to frame the continued Anglican debate on identity, especially as relating to the possibility of ecumenical discussion with other churches. This ecumenical aspiration became much more of a possibility, as other denominational groups rapidly followed the example of the Anglican Communion in founding their own transnational alliances: the Alliance of Reformed Churches, the Ecumenical Methodist Council, the International Congregational Council, and the Baptist World Alliance. Theories Anglicanism was seen as a middle way, or via media, between two branches of Protestantism, Lutheranism and Reformed Christianity. In their rejection of absolute parliamentary authority, the Tractarians – and in particular John Henry Newman – looked back to the writings of 17th-century Anglican divines, finding in these texts the idea of the English church as a via media between the Protestant and Catholic traditions. This view was associated – especially in the writings of Edward Bouverie Pusey – with the theory of Anglicanism as one of three "branches" (alongside the Roman Catholic Church and the Orthodox Church) historically arising out of the common tradition of the earliest ecumenical councils. Newman himself subsequently rejected his theory of the via media, as essentially historicist and static and hence unable to accommodate any dynamic development within the church. Nevertheless, the aspiration to ground Anglican identity in the writings of the 17th-century divines and in faithfulness to the traditions of the Church Fathers reflects a continuing theme of Anglican ecclesiology, most recently in the writings of Henry Robert McAdoo. The Tractarian formulation of the theory of the via media between Protestantism and Roman Catholicism was essentially a party platform, and not acceptable to Anglicans outside the confines of the Oxford Movement. However, this theory of the via media was reworked in the ecclesiological writings of Frederick Denison Maurice, in a more dynamic form that became widely influential. Both Maurice and Newman saw the Church of England of their day as sorely deficient in faith; but whereas Newman had looked back to a distant past when the light of faith might have appeared to burn brighter, Maurice looked forward to the possibility of a brighter revelation of faith in the future. Maurice saw the Protestant and Catholic strands within the Church of England as contrary but complementary, both maintaining elements of the true church, but incomplete without the other; such that a true catholic and evangelical church might come into being by a union of opposites. Central to Maurice's perspective was his belief that the collective elements of family, nation, and church represented a divine order of structures through which God unfolds his continuing work of creation. Hence, for Maurice, the Protestant tradition had maintained the elements of national distinction which were amongst the marks of the true universal church, but which had been lost within contemporary Roman Catholicism in the internationalism of centralised papal authority. Within the coming universal church that Maurice foresaw, national churches would each maintain the six signs of Catholicity: baptism, Eucharist, the creeds, Scripture, an episcopal ministry, and a fixed liturgy (which could take a variety of forms in accordance with divinely ordained distinctions in national characteristics). This vision of a becoming universal church as a congregation of autonomous national churches proved highly congenial in Anglican circles; and Maurice's six signs were adapted to form the Chicago-Lambeth Quadrilateral of 1888. In the latter decades of the 20th century, Maurice's theory, and the various strands of Anglican thought that derived from it, have been criticised by Stephen Sykes, who argues that the terms Protestant and Catholic as used in these approaches are synthetic constructs denoting ecclesiastic identities unacceptable to those to whom the labels are applied. Hence, the Catholic Church does not regard itself as a party or strand within the universal church – but rather identifies itself as the universal church. Moreover, Sykes criticises the proposition, implicit in theories of via media, that there is no distinctive body of Anglican doctrines, other than those of the universal church; accusing this of being an excuse not to undertake systematic doctrine at all. Contrariwise, Sykes notes a high degree of commonality in Anglican liturgical forms and in the doctrinal understandings expressed within those liturgies. He proposes that Anglican identity might rather be found within a shared consistent pattern of prescriptive liturgies, established and maintained through canon law, and embodying both a historic deposit of formal statements of doctrine, and also framing the regular reading and proclamation of scripture. Sykes nevertheless agrees with those heirs of Maurice who emphasise the incompleteness of Anglicanism as a positive feature, and quotes with qualified approval the words of Michael Ramsey: Doctrine "Catholic and reformed" The distinction between Reformed and Catholic, and the coherence of the two, is a matter of debate within the Anglican Communion. The Oxford Movement of the mid-19th century revived and extended doctrinal, liturgical, and pastoral practices similar to those of Roman Catholicism. This extends beyond the ceremony of high church services to even more theologically significant territory, such as sacramental theology (see Anglican sacraments). While Anglo-Catholic practices, particularly liturgical ones, have become more common within the tradition over the last century, there are also places where practices and beliefs resonate more closely with the evangelical movements of the 1730s (see Sydney Anglicanism). Guiding principles For high-church Anglicans, doctrine is neither established by a magisterium, nor derived from the theology of an eponymous founder (such as Calvinism), nor summed up in a confession of faith beyond the ecumenical creeds (such as the Lutheran Book of Concord). For them, the earliest Anglican theological documents are its prayer books, which they see as the products of profound theological reflection, compromise, and synthesis. They emphasise the Book of Common Prayer as a key expression of Anglican doctrine. The principle of looking to the prayer books as a guide to the parameters of belief and practice is called by the Latin name lex orandi, lex credendi ("the law of prayer is the law of belief"). Within the prayer books are the fundamentals of Anglican doctrine: the Apostles' and Nicene creeds, the Athanasian Creed (now rarely used), the scriptures (via the lectionary), the sacraments, daily prayer, the catechism, and apostolic succession in the context of the historic threefold ministry. For some low-church and evangelical Anglicans, the 16th-century Reformed Thirty-Nine Articles form the basis of doctrine. Distinctives of Anglican belief The Thirty-Nine Articles played a significant role in Anglican doctrine and practice. Following the passing of the 1604 canons, all Anglican clergy had to formally subscribe to the articles. Today, however, the articles are no longer binding, but are seen as a historical document which has played a significant role in the shaping of Anglican identity. The degree to which each of the articles has remained influential varies. On the doctrine of justification, for example, there is a wide range of beliefs within the Anglican Communion, with some Anglo-Catholics arguing for a faith with good works and the sacraments. At the same time, however, some evangelical Anglicans ascribe to the Reformed emphasis on sola fide ("faith alone") in their doctrine of justification (see Sydney Anglicanism). Still other Anglicans adopt a nuanced view of justification, taking elements from the early Church Fathers, Catholicism, Protestantism, liberal theology, and latitudinarian thought. Arguably, the most influential of the original articles has been Article VI on the "sufficiency of scripture", which says that "Scripture containeth all things necessary to salvation: so that whatsoever is not read therein, nor may be proved thereby, is not to be required of any man, that it should be believed as an article of the Faith, or be thought requisite or necessary to salvation." This article has informed Anglican biblical exegesis and hermeneutics since earliest times. Anglicans look for authority in their "standard divines" (see below). Historically, the most influential of these – apart from Cranmer – has been the 16th-century cleric and theologian Richard Hooker, who after 1660 was increasingly portrayed as the founding father of Anglicanism. Hooker's description of Anglican authority as being derived primarily from scripture, informed by reason (the intellect and the experience of God) and tradition (the practices and beliefs of the historical church), has influenced Anglican self-identity and doctrinal reflection perhaps more powerfully than any other formula. The analogy of the "three-legged stool" of scripture, reason, and tradition is often incorrectly attributed to Hooker. Rather, Hooker's description is a hierarchy of authority, with scripture as foundational and reason and tradition as vitally important, but secondary, authorities. Finally, the extension of Anglicanism into non-English cultures, the growing diversity of prayer books, and the increasing interest in ecumenical dialogue have led to further reflection on the parameters of Anglican identity. Many Anglicans look to the Chicago-Lambeth Quadrilateral of 1888 as the sine qua non of communal identity. In brief, the quadrilateral's four points are the scriptures as containing all things necessary to salvation; the creeds (specifically, the Apostles' and Nicene Creeds) as the sufficient statement of Christian faith; the dominical sacraments of Baptism and Holy Communion; and the historic episcopate. Divines Within the Anglican tradition, "divines" are clergy of the Church of England whose theological writings have been considered standards for faith, doctrine, worship, and spirituality, and whose influence has permeated the Anglican Communion in varying degrees through the years. While there is no authoritative list of these Anglican divines, there are some whose names would likely be found on most lists – those who are commemorated in lesser feasts of the Anglican churches and those whose works are frequently anthologised. The corpus produced by Anglican divines is diverse. What they have in common is a commitment to the faith as conveyed by scripture and the Book of Common Prayer, thus regarding prayer and theology in a manner akin to that of the Apostolic Fathers. On the whole, Anglican divines view the via media of Anglicanism not as a compromise, but as "a positive position, witnessing to the universality of God and God's kingdom working through the fallible, earthly ecclesia Anglicana". These theologians regard scripture as interpreted through tradition and reason as authoritative in matters concerning salvation. Reason and tradition, indeed, are extant in and presupposed by scripture, thus implying co-operation between God and humanity, God and nature, and between the sacred and secular. Faith is thus regarded as incarnational and authority as dispersed. Amongst the early Anglican divines of the 16th and 17th centuries, the names of Thomas Cranmer, John Jewel, Matthew Parker, Richard Hooker, Lancelot Andrewes, and Jeremy Taylor predominate. The influential character of Hooker's Of the Laws of Ecclesiastical Polity cannot be overestimated. Published in 1593 and subsequently, Hooker's eight-volume work is primarily a treatise on church-state relations, but it deals comprehensively with issues of biblical interpretation, soteriology, ethics, and sanctification. Throughout the work, Hooker makes clear that theology involves prayer and is concerned with ultimate issues and that theology is relevant to the social mission of the church. The 17th century saw the rise of two important movements in Anglicanism: Cambridge Platonism, with its mystical understanding of reason as the "candle of the Lord", and the evangelical revival, with its emphasis on the personal experience of the Holy Spirit. The Cambridge Platonist movement evolved into a school called Latitudinarianism, which emphasised reason as the barometer of discernment and took a stance of indifference towards doctrinal and ecclesiological differences. The evangelical revival, influenced by such figures as John Wesley and Charles Simeon, re-emphasised the importance of justification through faith and the consequent importance of personal conversion. Some in this movement, such as Wesley and George Whitefield, took the message to the United States, influencing the First Great Awakening and creating an Anglo-American movement called Methodism that would eventually break away, structurally, from the Anglican churches after the American Revolution. By the 19th century, there was a renewed interest in pre-Reformation English religious thought and practice. Theologians such as John Keble, Edward Bouverie Pusey, and John Henry Newman had widespread influence in the realm of polemics, homiletics and theological and devotional works, not least because they largely repudiated the old high-church tradition and replaced it with a dynamic appeal to antiquity which looked beyond the Reformers and Anglican formularies. Their work is largely credited with the development of the Oxford Movement, which sought to reassert Catholic identity and practice in Anglicanism. In contrast to this movement, clergy such as the Bishop of Liverpool, J. C. Ryle, sought to uphold the distinctly Reformed identity of the Church of England. He was not a servant of the status quo, but argued for a lively religion which emphasised grace, holy and charitable living, and the plain use of the 1662 Book of Common Prayer (interpreted in a partisan evangelical way) without additional rituals. Frederick Denison Maurice, through such works as The Kingdom of Christ, played a pivotal role in inaugurating another movement, Christian socialism. In this, Maurice transformed Hooker's emphasis on the incarnational nature of Anglican spirituality to an imperative for social justice. In the 19th century, Anglican biblical scholarship began to assume a distinct character, represented by the so-called "Cambridge triumvirate" of Joseph Lightfoot, F. J. A. Hort, and Brooke Foss Westcott. Their orientation is best summed up by Westcott's observation that "Life which Christ is and which Christ communicates, the life which fills our whole beings as we realise its capacities, is active fellowship with God." The earlier part of the 20th century is marked by Charles Gore, with his emphasis on natural revelation, and William Temple's focus on Christianity and society, while, from outside England, Robert Leighton, Archbishop of Glasgow, and several clergy from the United States have been suggested, such as William Porcher DuBose, John Henry Hobart (1775–1830, Bishop of New York 1816–30), William Meade, Phillips Brooks, and Charles Brent. Churchmanship Churchmanship can be defined as the manifestation of theology in the realms of liturgy, piety and, to some extent, spirituality. Anglican diversity in this respect has tended to reflect the diversity in the tradition's Reformed and Catholic identity. Different individuals, groups, parishes, dioceses and provinces may identify more closely with one or the other, or some mixture of the two. The range of Anglican belief and practice became particularly divisive during the 19th century, when some clergy were disciplined and even imprisoned on charges of introducing illegal ritual while, at the same time, others were criticised for engaging in public worship services with ministers of Reformed churches. Resistance to the growing acceptance and restoration of traditional Catholic ceremonial by the mainstream of Anglicanism ultimately led to the formation of small breakaway churches such as the Free Church of England in England (1844) and the Reformed Episcopal Church in North America (1873). Anglo-Catholic (and some broad-church) Anglicans celebrate public liturgy in ways that understand worship to be something very special and of utmost importance. Vestments are worn by the clergy, sung settings are often used, and incense may be used. Nowadays, in most Anglican churches, the Eucharist is celebrated in a manner similar to the usage of Roman Catholics and some Lutherans, though, in many churches, more traditional, "pre–Vatican II" models of worship are common (e.g., an "eastward orientation" at the altar). Whilst many Anglo-Catholics derive much of their liturgical practice from that of the pre-Reformation English church, others more closely follow traditional Roman Catholic practices. The Eucharist may sometimes be celebrated in the form known as High Mass, with a priest, deacon and subdeacon (usually actually a layman) dressed in traditional vestments, with incense and sanctus bells and prayers adapted from the Roman Missal or other sources by the celebrant. Such churches may also have forms of eucharistic adoration such as Benediction of the Blessed Sacrament. In terms of personal piety, some Anglicans may recite the Rosary and Angelus, be involved in a devotional society dedicated to "Our Lady" (the Blessed Virgin Mary) and seek the intercession of the saints. In recent decades, the prayer books of several provinces have, out of deference to a greater agreement with Eastern Conciliarism (and a perceived greater respect accorded Anglicanism by Eastern Orthodoxy than by Roman Catholicism), instituted a number of historically Eastern and Oriental Orthodox elements in their liturgies, including introduction of the Trisagion and deletion of the filioque clause from the Nicene Creed. For their part, those evangelical (and some broad-church) Anglicans who emphasise the more Protestant aspects of the Church stress the Reformation theme of salvation by grace through faith. They emphasise the two dominical sacraments of Baptism and Eucharist, viewing the other five as "lesser rites". Some evangelical Anglicans may even tend to take the inerrancy of scripture literally, adopting the view of Article VI that it contains all things necessary to salvation in an explicit sense. Worship in churches influenced by these principles tends to be significantly less elaborate, with greater emphasis on the Liturgy of the Word (the reading of the scriptures, the sermon, and the intercessory prayers). The Order for Holy Communion may be celebrated bi-weekly or monthly (in preference to the daily offices), by priests attired in choir habit, or more regular clothes, rather than Eucharistic vestments. Ceremony may be in keeping with their view of the provisions of the 17th-century Puritans – being a Reformed interpretation of the Ornaments Rubric – no candles, no incense, no bells, and a minimum of manual actions by the presiding celebrant (such as touching the elements at the Words of Institution). In recent decades, there has been a growth of charismatic worship among Anglicans. Both Anglo-Catholics and evangelicals have been affected by this movement such that it is not uncommon to find typically charismatic postures, music, and other themes evident during the services of otherwise Anglo-Catholic or evangelical parishes. The spectrum of Anglican beliefs and practice is too large to be fit into these labels. Many Anglicans locate themselves somewhere in the spectrum of the broad-church tradition and consider themselves an amalgam of evangelical and Catholic. Such Anglicans stress that Anglicanism is the via media (middle way) between the two major strains of Western Christianity and that Anglicanism is like a "bridge" between the two strains. Sacramental doctrine and practice In accord with its prevailing self-identity as a via media or "middle path" of Western Christianity, Anglican sacramental theology expresses elements in keeping with its status as being both a church in the Catholic tradition as well as a Reformed church. With respect to sacramental theology, the Catholic heritage is perhaps most strongly asserted in the importance Anglicanism places on the sacraments as a means of grace, sanctification, and salvation, as expressed in the church's liturgy and doctrine. Of the seven sacraments, all Anglicans recognise Baptism and the Eucharist as being directly instituted by Christ. The other five – Confession/Absolution, Matrimony, Confirmation, Holy Orders (also called Ordination), and Anointing of the Sick (also called Unction) – are regarded variously as full sacraments by Anglo-Catholics and many high church and some broad-church Anglicans, but merely as "sacramental rites" by other broad-church and low-church Anglicans, especially evangelicals associated with Reform UK and the Diocese of Sydney. Eucharistic theology Anglican eucharistic theology is divergent in practice, reflecting the essential comprehensiveness of the tradition. A few low-church Anglicans take a strictly memorialist (Zwinglian) view of the sacrament. In other words, they see Holy Communion as a memorial to Christ's suffering, and participation in the Eucharist as both a re-enactment of the Last Supper and a foreshadowing of the heavenly banquet – the fulfilment of the eucharistic promise. Other low-church Anglicans believe in the real presence of Christ in the Eucharist but deny that the presence of Christ is carnal or is necessarily localised in the bread and wine. Despite explicit criticism in the Thirty-Nine Articles, many high-church or Anglo-Catholic Anglicans hold, more or less, the Catholic view of the real presence as expressed in the doctrine of transubstantiation, seeing the Eucharist as a liturgical representation of Christ's atoning sacrifice with the elements actually transformed into Christ's body and blood. The majority of Anglicans, however, have in common a belief in the real presence, defined in one way or another. To that extent, they are in the company of the continental reformer Martin Luther and Calvin rather than Ulrich Zwingli. The Catechism of the American BCP of 1976 repeats the standard Anglican view ("The outward and visible sign in the Eucharist is the bread and wine"..."The inward and spiritual grace in the Holy Communion is the Body and Blood of Christ given to his people, and received by faith") without further definition. It should be remembered that Anglicanism has no official doctrine on this matter, believing it is wiser to leave the Presence a mystery. The faithful can believe privately whatever explanation they favour, be it transubstantiation, consubstantiation, receptionism, or virtualism (the two most congenial to Anglicans for centuries until the Oxford Movement), each of which espouses belief in the real presence in one way or another, or memorialism, which has never been an option with Anglicans. A famous Anglican aphorism regarding Christ's presence in the sacrament, commonly misattributed to Queen Elizabeth I, is first found in print in a poem by John Donne: He was the word that spake it, He took the bread and brake it: And what that word did make it, I do believe and take it. An Anglican position on the eucharistic sacrifice ("Sacrifice of the Mass") was expressed in the response Saepius officio of the Archbishops of Canterbury and York to Pope Leo XIII's Papal Encyclical Apostolicae curae: viz. that the Prayer Book contained a strong sacrificial theology. Later revisions of the Prayer Book influenced by the Scottish Canon of 1764 first adopted by the Protestant Episcopal Church in 1789 made this assertion quite evident: "we do make and celebrate before thy Divine Majesty with these thy holy gifts, which we now OFFER unto thee, the memorial thy Son has commanded us to make", which is repeated in the 1929 English BCP and included in such words or others such as "present" or "show forth" in subsequent revisions. Anglican and Roman Catholic representatives declared that they had "substantial agreement on the doctrine of the Eucharist" in the Windsor Statement on Eucharistic Doctrine by the Anglican-Roman Catholic International Consultation (1971) and the Elucidation of the ARCIC Windsor Statement (1979). The final response (1991) to these documents by the Vatican made it plain that it did not consider the degree of agreement reached to be satisfactory. Practices In Anglicanism, there is a distinction between liturgy, which is the formal public and communal worship of the Church, and personal prayer and devotion, which may be public or private. Liturgy is regulated by the prayer books and consists of the Holy Eucharist (some call it Holy Communion or Mass), the other six Sacraments, and the Divine Office or Liturgy of the Hours. Book of Common Prayer The Book of Common Prayer (BCP) is the foundational prayer book of Anglicanism. The original book of 1549 (revised in 1552) was one of the instruments of the English Reformation, replacing the various "uses" or rites in Latin that had been used in different parts of the country with a single compact volume in the language of the people, so that "now from henceforth all the Realm shall have but one use". Suppressed under Queen Mary I, it was revised in 1559, and then again in 1662, after the Restoration of Charles II. This version was made mandatory in England and Wales by the Act of Uniformity and was in standard use until the mid-20th century. With British colonial expansion from the 17th century onwards, Anglican churches were planted around the globe. These churches at first used and then revised the Book of Common Prayer until they, like their parent church, produced prayer books which took into account the developments in liturgical study and practice in the 19th and 20th centuries, which come under the general heading of the Liturgical Movement. Worship Anglican worship services are open to all visitors. Anglican worship originates principally in the reforms of Thomas Cranmer, who aimed to create a set order of service like that of the pre-Reformation church but less complex in its seasonal variety and said in English rather than Latin. This use of a set order of service is not unlike the Catholic tradition. Traditionally, the pattern was that laid out in the Book of Common Prayer. Although many Anglican churches now use a wide range of modern service books written in the local language, the structures of the Book of Common Prayer are largely retained. Churches which call themselves Anglican will have identified themselves so because they use some form or variant of the Book of Common Prayer in the shaping of their worship. Anglican worship, however, is as diverse as Anglican theology. A contemporary "low-church" service may differ little from the worship of many mainstream non-Anglican Protestant churches. The service is constructed around a sermon focused on Biblical exposition and opened with one or more Bible readings and closed by a series of prayers (both set and extemporised) and hymns or songs. A "high church" or Anglo-Catholic service, by contrast, is usually a more formal liturgy celebrated by clergy in distinctive vestments and may be almost indistinguishable from a Roman Catholic service, often resembling the "pre–Vatican II" Tridentine rite. Between these extremes are a variety of styles of worship, often involving a robed choir and the use of the organ to accompany the singing and to provide music before and after the service. Anglican churches tend to have pews or chairs, and it is usual for the congregation to kneel for some prayers but to stand for hymns and other parts of the service such as the Gloria, Collect, Gospel reading, Creed and either the Preface or all of the Eucharistic Prayer. Anglicans may genuflect or cross themselves in the same way as Roman Catholics. Other more traditional Anglicans tend to follow the 1662 Book of Common Prayer, and retain the use of the King James Bible. This is typical in many Anglican cathedrals and particularly in Royal Peculiars such as the Savoy Chapel and the Queen's Chapel. These services reflect older Anglican liturgies and differ from the Traditional Anglican Communion in that they are in favour of women priests and the ability of clergy to marry. These Anglican church services include classical music instead of songs, hymns from the New English Hymnal (usually excluding modern hymns such as "Lord of the Dance"), and are generally non-evangelical and formal in practice. Until the mid-20th century the main Sunday service was typically morning prayer, but the Eucharist has once again become the standard form of Sunday worship in many Anglican churches; this again is similar to Roman Catholic practice. Other common Sunday services include an early morning Eucharist without music, an abbreviated Eucharist following a service of morning prayer, and a service of evening prayer, sometimes in the form of sung Evensong, usually celebrated between 3 and 6 pm. The late-evening service of Compline was revived in parish use in the early 20th century. Many Anglican churches will also have daily morning and evening prayer, and some have midweek or even daily celebration of the Eucharist. An Anglican service (whether or not a Eucharist) will include readings from the Bible that are generally taken from a standardised lectionary, which provides for much of the Bible (and some passages from the Apocrypha) to be read out loud in the church over a cycle of one, two, or three years (depending on which eucharistic and office lectionaries are used, respectively). The sermon (or homily) is typically about ten to twenty minutes in length, often comparably short to sermons in evangelical churches. Even in the most informal Anglican services, it is common for set prayers such as the weekly Collect to be read. There are also set forms for intercessory prayer, though this is now more often extemporaneous. In high and Anglo-Catholic churches there are generally prayers for the dead. Although Anglican public worship is usually ordered according to the canonically approved services, in practice many Anglican churches use forms of service outside these norms. Liberal churches may use freely structured or experimental forms of worship, including patterns borrowed from ecumenical traditions such as those of the Taizé Community or the Iona Community. Anglo-Catholic parishes might use the modern Roman Catholic liturgy of the Mass or more traditional forms, such as the Tridentine Mass (which is translated into English in the English Missal), the Anglican Missal, or, less commonly, the Sarum Rite. Catholic devotions such as the Rosary, Angelus, and Benediction of the Blessed Sacrament are also common among Anglo-Catholics. Eucharistic discipline Only baptised persons are eligible to receive communion, although in many churches communion is restricted to those who have not only been baptised but also confirmed. In many Anglican provinces, however, all baptised Christians are now often invited to receive communion and some dioceses have regularised a system for admitting baptised young people to communion before they are confirmed. The discipline of fasting before communion is practised by some Anglicans. Most Anglican priests require the presence of at least one other person for the celebration of the Eucharist (referring back to Christ's statement in Matthew 18:20, "When two or more are gathered in my name, I will be in the midst of them."), though some Anglo-Catholic priests (like Roman Catholic priests) may say private Masses. As in the Roman Catholic Church, it is a canonical requirement to use fermented wine for communion. Unlike in Roman Catholicism, the consecrated bread and wine are always offered to the congregation at a eucharistic service ("communion in both kinds"). This practice is becoming more frequent in the Roman Catholic Church as well, especially through the Neocatechumenal Way. In some churches, the sacrament is reserved in a tabernacle or aumbry with a lighted candle or lamp nearby. In Anglican churches, only a priest or a bishop may be the celebrant at the Eucharist. Divine office All Anglican prayer books contain offices for Morning Prayer (Matins) and Evening Prayer (Evensong). In the original Book of Common Prayer, these were derived from combinations of the ancient monastic offices of Matins and Lauds; and Vespers and Compline, respectively. The prayer offices have an important place in Anglican history. Prior to the Catholic revival of the 19th century, which eventually restored the Holy Eucharist as the principal Sunday liturgy, and especially during the 18th century, a morning service combining Matins, the Litany, and ante-Communion comprised the usual expression of common worship, while Matins and Evensong were sung daily in cathedrals and some collegiate chapels. This nurtured a tradition of distinctive Anglican chant applied to the canticles and psalms used at the offices (although plainsong is often used as well). In some official and many unofficial Anglican service books, these offices are supplemented by other offices such as the Little Hours of Prime and prayer during the day such as (Terce, Sext, None, and Compline). Some Anglican monastic communities have a Daily Office based on that of the Book of Common Prayer but with additional antiphons and canticles, etc., for specific days of the week, specific psalms, etc. See, for example, Order of the Holy Cross and Order of St Helena, editors, A Monastic Breviary (Wilton, Conn.: Morehouse-Barlow, 1976). The All Saints Sisters of the Poor, with convents in Catonsville, Maryland, and elsewhere, use an elaborated version of the Anglican Daily Office. The Society of St. Francis publishes Celebrating Common Prayer, which has become especially popular for use among Anglicans. In England, the United States, Canada, Australia, New Zealand, and some other Anglican provinces, the modern prayer books contain four offices: Morning Prayer, corresponding to Matins, Lauds and Prime; Prayer During the Day, roughly corresponding to the combination of Terce, Sext, and None (Noonday Prayer in the USA); Evening Prayer, corresponding to Vespers (and Compline); Compline. In addition, most prayer books include a section of prayers and devotions for family use. In the US, these offices are further supplemented by an "Order of Worship for the Evening", a prelude to or an abbreviated form of Evensong, partly derived from Orthodox prayers. In the United Kingdom, the publication of Daily Prayer, the third volume of Common Worship, was published in 2005. It retains the services for Morning and Evening Prayer and Compline and includes a section entitled "Prayer during the Day". A New Zealand Prayer Book of 1989 provides different outlines for Matins and Evensong on each day of the week, as well as "Midday Prayer", "Night Prayer" and "Family Prayer". Some Anglicans who pray the office on daily basis use the present Divine Office of the Roman Catholic Church. In many cities, especially in England, Anglican and Roman Catholic priests and lay people often meet several times a week to pray the office in common. A small but enthusiastic minority use the Anglican Breviary, or other translations and adaptations of the pre–Vatican II Roman Rite and Sarum Rite, along with supplemental material from cognate western sources, to provide such things as a common of Octaves, a common of Holy Women, and other additional material. Others may privately use idiosyncratic forms borrowed from a wide range of Christian traditions. "Quires and Places where they sing" In the late medieval period, many English cathedrals and monasteries had established small choirs of trained lay clerks and boy choristers to perform polyphonic settings of the Mass in their Lady chapels. Although these "Lady Masses" were discontinued at the Reformation, the associated musical tradition was maintained in the Elizabethan Settlement through the establishment of choral foundations for daily singing of the Divine Office by expanded choirs of men and boys. This resulted from an explicit addition by Elizabeth herself to the injunctions accompanying the 1559 Book of Common Prayer (that had itself made no mention of choral worship) by which existing choral foundations and choir schools were instructed to be continued, and their endowments secured. Consequently, some thirty-four cathedrals, collegiate churches, and royal chapels maintained paid establishments of lay singing men and choristers in the late 16th century. All save four of these have – with interruptions during the Commonwealth and the COVID-19 pandemic – continued daily choral prayer and praise to this day. In the Offices of Matins and Evensong in the 1662 Book of Common Prayer, these choral establishments are specified as "Quires and Places where they sing". For nearly three centuries, this round of daily professional choral worship represented a tradition entirely distinct from that embodied in the intoning of Parish Clerks, and the singing of "west gallery choirs" which commonly accompanied weekly worship in English parish churches. In 1841, the rebuilt Leeds Parish Church established a surpliced choir to accompany parish services, drawing explicitly on the musical traditions of the ancient choral foundations. Over the next century, the Leeds example proved immensely popular and influential for choirs in cathedrals, parish churches, and schools throughout the Anglican communion. More or less extensively adapted, this choral tradition also became the direct inspiration for robed choirs leading congregational worship in a wide range of Christian denominations. In 1719, the cathedral choirs of Gloucester, Hereford, and Worcester combined to establish the annual Three Choirs Festival, the precursor for the multitude of summer music festivals since. By the 20th century, the choral tradition had become for many the most accessible face of worldwide Anglicanism – especially as promoted through the regular broadcasting of choral evensong by the BBC; and also in the annual televising of the festival of Nine Lessons and Carols from King's College, Cambridge. Composers closely concerned with this tradition include Edward Elgar, Ralph Vaughan Williams, Gustav Holst, Charles Villiers Stanford, and Benjamin Britten. A number of important 20th-century works by non-Anglican composers were originally commissioned for the Anglican choral tradition – for example, the Chichester Psalms of Leonard Bernstein and the Nunc dimittis of Arvo Pärt. Communion Principles of governance Contrary to popular misconception, the British monarch is not the constitutional "head" of the Church of England but is, in law, the church's "supreme governor", nor does the monarch have any role in provinces outside England. The role of the crown in the Church of England is practically limited to the appointment of bishops, including the Archbishop of Canterbury, and even this role is limited, as the church presents the government with a short list of candidates from which to choose. This process is accomplished through collaboration with and consent of ecclesial representatives (see Ecclesiastical Commissioners). Although the monarch has no constitutional role in Anglican churches in other parts of the world, the prayer books of several countries where the monarch is head of state contain prayers for him or her as sovereign. A characteristic of Anglicanism is that it has no international juridical authority. All forty-two provinces of the Anglican Communion are autonomous, each with their own primate and governing structure. These provinces may take the form of national churches (such as in Canada, Uganda or Japan) or a collection of nations (such as the West Indies, Central Africa or South Asia), or geographical regions (such as Vanuatu and Solomon Islands) etc. Within these provinces there may exist subdivisions, called ecclesiastical provinces, under the jurisdiction of a metropolitan archbishop. All provinces of the Anglican Communion consist of dioceses, each under the jurisdiction of a bishop. In the Anglican tradition, bishops must be consecrated according to the strictures of apostolic succession, which Anglicans consider one of the marks of catholicity. Apart from bishops, there are two other orders of ordained ministry: deacon and priest. No requirement is made for clerical celibacy, though many Anglo-Catholic priests have traditionally been bachelors. Because of innovations that occurred at various points after the latter half of the 20th century, women may be ordained as deacons in almost all provinces, as priests in most and as bishops in many. Anglican religious orders and communities, suppressed in England during the Reformation, have re-emerged, especially since the mid-19th century, and now have an international presence and influence. Government in the Anglican Communion is synodical, consisting of three houses of laity (usually elected parish representatives), clergy and bishops. National, provincial and diocesan synods maintain different scopes of authority, depending on their canons and constitutions. Anglicanism is not congregational in its polity: it is the diocese, not the parish church, which is the smallest unit of authority in the church. (See Episcopal polity). Archbishop of Canterbury The Archbishop of Canterbury has a precedence of honour over the other primates of the Anglican Communion, and for a province to be considered a part of the communion means specifically to be in full communion with the see of Canterbury – though this principle is currently subject to considerable debate, especially among those in the so-called Global South, including American Anglicans. The archbishop is, therefore, recognised as primus inter pares ("first amongst equals"), even though he does not exercise any direct authority in any province outside England, of which he is chief primate. Rowan Williams, the Archbishop of Canterbury from 2002 to 2012, was the first archbishop appointed from outside the Church of England since the Reformation: he was formerly the Archbishop of Wales. As "spiritual head" of the communion, the Archbishop of Canterbury maintains a certain moral authority and has the right to determine which churches will be in communion with his see. He hosts and chairs the Lambeth Conferences of Anglican Communion bishops and decides who will be invited to them. He also hosts and chairs the Anglican Communion Primates' Meeting and is responsible for the invitations to it. He acts as president of the secretariat of the Anglican Communion Office and its deliberative body, the Anglican Consultative Council. Conferences The Anglican Communion has no international juridical organisation. All international bodies are consultative and collaborative, and their resolutions are not legally binding on the autonomous provinces of the communion. There are three international bodies of note. The Lambeth Conference is the oldest international consultation. It was first convened by Archbishop Charles Longley in 1867 as a vehicle for bishops of the communion to "discuss matters of practical interest, and pronounce what we deem expedient in resolutions which may serve as safe guides to future action". Since then, it has been held roughly every ten years. Invitation is by the Archbishop of Canterbury. The Anglican Consultative Council was created by a 1968 Lambeth Conference resolution and meets biennially. The council consists of representative bishops, clergy and laity chosen by the forty-two provinces. The body has a permanent secretariat, the Anglican Communion Office, of which the Archbishop of Canterbury is president. The Anglican Communion Primates' Meeting is the most recent manifestation of international consultation and deliberation, having been first convened by Archbishop Donald Coggan in 1978 as a forum for "leisurely thought, prayer and deep consultation". Ordained ministry Like the Roman Catholic Church and the Orthodox churches, the Anglican Communion maintains the threefold ministry of deacons, presbyters (usually called "priests"), and bishops. Episcopate Bishops, who possess the fullness of Christian priesthood, are the successors of the apostles. Primates, archbishops, and metropolitans are all bishops and members of the historical episcopate who derive their authority through apostolic succession – an unbroken line of bishops that can be traced back to the 12 apostles of Jesus. Priesthood Bishops are assisted by priests and deacons. Most ordained ministers in the Anglican Communion are priests, who usually work in parishes within a diocese. Priests are in charge of the spiritual life of parishes and are usually called the rector or vicar. A curate (or, more correctly, an "assistant curate") is a priest or deacon who assists the parish priest. Non-parochial priests may earn their living by any vocation, although employment by educational institutions or charitable organisations is most common. Priests also serve as chaplains of hospitals, schools, prisons, and in the armed forces. An archdeacon is a priest or deacon responsible for administration of an archdeaconry, which is often the name given to the principal subdivisions of a diocese. An archdeacon represents the diocesan bishop in his or her archdeaconry. In the Church of England, the position of archdeacon can only be held by someone in priestly orders who has been ordained for at least six years. In some other parts of the Anglican Communion, the position can also be held by deacons. In parts of the Anglican Communion where women cannot be ordained as priests or bishops but can be ordained as deacons, the position of archdeacon is effectively the most senior office to which an ordained woman can be appointed. A dean is a priest who is the principal cleric of a cathedral or other collegiate church and the head of the chapter of canons. If the cathedral or collegiate church has its own parish, the dean is usually also rector of the parish. However, in the Church of Ireland, the roles are often separated, and most cathedrals in the Church of England do not have associated parishes. In the Church in Wales, however, most cathedrals are parish churches and their deans are now also vicars of their parishes. The Anglican Communion recognises Roman Catholic and Eastern Orthodox ordinations as valid. Outside the Anglican Communion, Anglican ordinations (at least of male priests) are recognised by the Old Catholic Church, Porvoo Communion Lutherans, and various Independent Catholic churches. Diaconate In Anglican churches, deacons often work directly in ministry to the marginalised inside and outside the church: the poor, the sick, the hungry, the imprisoned. Unlike Orthodox and most Roman Catholic deacons who may be married only before ordination, deacons are permitted to marry freely both before and after ordination, as are priests. Most deacons are preparing for priesthood and usually only remain as deacons for about a year before being ordained priests. However, there are some deacons who remain so. Many provinces of the Anglican Communion ordain both men and women as deacons. Many of those provinces that ordain women to the priesthood previously allowed them to be ordained only to the diaconate. The effect of this was the creation of a large and overwhelmingly female diaconate for a time, as most men proceeded to be ordained priest after a short time as a deacon. Deacons, in some dioceses, can be granted licences to solemnise matrimony, usually under the instruction of their parish priest and bishop. They sometimes officiate at Benediction of the Blessed Sacrament in churches which have this service. Deacons are not permitted to preside at the Eucharist (but can lead worship with the distribution of already consecrated communion where this is permitted), absolve sins, or pronounce a blessing. It is the prohibition against deacons pronouncing blessings that leads some to believe that deacons cannot solemnise matrimony. Laity All baptised members of the church are called Christian faithful, truly equal in dignity and in the work to build the church. Some non-ordained people also have a formal public ministry, often on a full-time and long-term basis – such as lay readers (also known as readers), churchwardens, vergers, and sextons. Other lay positions include acolytes (male or female, often children), lay eucharistic ministers (also known as chalice bearers), and lay eucharistic visitors (who deliver consecrated bread and wine to "shut-ins" or members of the parish who are unable to leave home or hospital to attend the Eucharist). Lay people also serve on the parish altar guild (preparing the altar and caring for its candles, linens, flowers, etc.), in the choir and as cantors, as ushers and greeters, and on the church council (called the "vestry" in some countries), which is the governing body of a parish. Religious orders A small yet influential aspect of Anglicanism is its religious orders and communities. Shortly after the beginning of the Catholic Revival in the Church of England, there was a renewal of interest in re-establishing religious and monastic orders and communities. One of Henry VIII's earliest acts was their dissolution and seizure of their assets. In 1841, Marian Rebecca Hughes became the first woman to take the vows of religion in communion with the Province of Canterbury since the Reformation. In 1848, Priscilla Lydia Sellon became the superior of the Society of the Most Holy Trinity at Devonport, Plymouth, the first organised religious order. Sellon is called "the restorer, after three centuries, of the religious life in the Church of England". For the next one hundred years, religious orders for both men and women proliferated throughout the world, becoming a numerically small but disproportionately influential feature of global Anglicanism. Anglican religious life at one time boasted hundreds of orders and communities, and thousands of religious. An important aspect of Anglican religious life is that most communities of both men and women lived their lives consecrated to God under the vows of poverty, chastity, and obedience (or, in Benedictine communities, Stability, Conversion of Life, and Obedience) by practising a mixed life of reciting the full eight services of the Breviary in choir, along with a daily Eucharist, plus service to the poor. The mixed life, combining aspects of the contemplative orders and the active orders, remains to this day a hallmark of Anglican religious life. Another distinctive feature of Anglican religious life is the existence of some mixed-gender communities. Since the 1960s, there has been a sharp decline in the number of professed religious in most parts of the Anglican Communion, especially in North America, Europe, and Australia. Many once large and international communities have been reduced to a single convent or monastery with memberships of elderly men or women. In the last few decades of the 20th century, novices have for most communities been few and far between. Some orders and communities have already become extinct. There are, however, still thousands of Anglican religious working today in approximately 200 communities around the world, and religious life in many parts of the Communion – especially in developing nations – flourishes. The most significant growth has been in the Melanesian countries of the Solomon Islands, Vanuatu, and Papua New Guinea. The Melanesian Brotherhood, founded at Tabalia, Guadalcanal, in 1925 by Ini Kopuria, is now the largest Anglican Community in the world, with over 450 brothers in the Solomon Islands, Vanuatu, Papua New Guinea, the Philippines, and the United Kingdom. The Sisters of the Church, started by Mother Emily Ayckbowm in England in 1870, has more sisters in the Solomons than all their other communities. The Community of the Sisters of Melanesia, started in 1980 by Sister Nesta Tiboe, is a growing community of women throughout the Solomon Islands. The Society of Saint Francis, founded as a union of various Franciscan orders in the 1920s, has experienced great growth in the Solomon Islands. Other communities of religious have been started by Anglicans in Papua New Guinea and in Vanuatu. Most Melanesian Anglican religious are in their early to mid-20s – vows may be temporary and it is generally assumed that brothers, at least, will leave and marry in due course – making the average age 40 to 50 years younger than their brothers and sisters in other countries. Growth of religious orders, especially for women, is marked in certain parts of Africa. Worldwide distribution Anglicanism represents the third largest Christian communion in the world, after the Roman Catholic Church and the Eastern Orthodox Church. The number of Anglicans in the world is over 85 million . The 11 provinces in Africa saw growth in the last two decades. They now include 36.7 million members, more Anglicans than there are in England. England remains the largest single Anglican province, with 26 million members. In most industrialised countries, church attendance has decreased since the 19th century. Anglicanism's presence in the rest of the world is due to large-scale emigration, the establishment of expatriate communities, or the work of missionaries. The Church of England has been a church of missionaries since the 17th century, when the Church first left English shores with colonists who founded what would become the United States, Australia, Canada, New Zealand, and South Africa, and established Anglican churches. For example, an Anglican chaplain, Robert Wolfall, with Martin Frobisher's Arctic expedition, celebrated the Eucharist in 1578 in Frobisher Bay. The first Anglican church in the Americas was built at Jamestown, Virginia, in 1607. By the 18th century, missionaries worked to establish Anglican churches in Asia, Africa, and Latin America. The great Church of England missionary societies were founded; for example, the Society for Promoting Christian Knowledge (SPCK) in 1698, the Society for the Propagation of the Gospel in Foreign Parts (SPG) in 1701, and the Church Mission Society (CMS) in 1799. The 19th century saw the founding and expansion of social-oriented evangelism with societies such as the Church Pastoral Aid Society (CPAS) in 1836, Mission to Seafarers in 1856, Girls' Friendly Society (GFS) in 1875, Mothers' Union in 1876, and Church Army in 1882, all carrying out a personal form of evangelism. The 20th century saw the Church of England developing new forms of evangelism such as the Alpha course in 1990, which was developed and propagated from Holy Trinity Brompton Church in London. In the 21st century, there has been renewed effort to reach children and youth. Fresh expressions is a Church of England missionary initiative to youth begun in 2005, and has ministries at a skate park through the efforts of St George's Church, Benfleet, Essex – Diocese of Chelmsford – or youth groups with evocative names, like the C.L.A.W (Christ Little Angels – Whatever!) youth group at Coventry Cathedral. And for the unchurched who do not actually wish to visit a brick and mortar church, there are Internet ministries such as the Diocese of Oxford's online Anglican i-Church, which appeared on the web in 2005. Ecumenism Anglican interest in ecumenical dialogue can be traced back to the time of the Reformation and dialogues with both Orthodox and Lutheran churches in the 16th century. In the 19th century, with the rise of the Oxford Movement, there arose greater concern for reunion of the churches of "Catholic confession". This desire to work towards full communion with other denominations led to the development of the Chicago-Lambeth Quadrilateral, approved by the third Lambeth Conference of 1888. The four points (the sufficiency of scripture, the historic creeds, the two dominical sacraments, and the historic episcopate) were proposed as a basis for discussion, although they have frequently been taken as a non-negotiable bottom-line for any form of reunion. Theological diversity Anglicanism in general has always sought a balance between the emphases of Catholicism and Protestantism, while tolerating a range of expressions of evangelicalism and ceremony. Clergy and laity from all Anglican churchmanship traditions have been active in the formation of the Continuing movement. While there are high church, broad-church and low-church Continuing Anglicans, many Continuing churches are Anglo-Catholic with highly ceremonial liturgical practices. Others belong to a more evangelical or low-church tradition and tend to support the Thirty-nine Articles and simpler worship services. Morning Prayer, for instance, is often used instead of the Holy Eucharist for Sunday worship services, although this is not necessarily true of all low-church parishes. Most Continuing churches in the United States reject the 1979 revision of the Book of Common Prayer by the Episcopal Church and use the 1928 version for their services instead. In addition, Anglo-Catholic bodies may use the Anglican Missal, Anglican Service Book or English Missal when celebrating Mass. Internal conflict A changing focus on social issues after the Second World War led to Lambeth Conference resolutions countenancing contraception and the remarriage of divorced persons. Eventually, most provinces approved the ordination of women. In more recent years, some jurisdictions have permitted the ordination of people in same-sex relationships and authorised rites for the blessing of same-sex unions (see Homosexuality and Anglicanism). "The more liberal provinces that are open to changing Church doctrine on marriage in order to allow for same-sex unions include Brazil, Canada, New Zealand, Scotland, South India, South Africa, the US and Wales," while the more conservative provinces are primarily located in the Global South. The lack of social consensus among and within provinces of diverse cultural traditions has resulted in considerable conflict and even schism concerning some or all of these developments (see Anglican realignment). More conservative elements within and outside of Anglicanism (primarily African churches and factions within North American Anglicanism) have opposed these changes, while some liberal and moderate Anglicans see this opposition as representing a new fundamentalism within Anglicanism and "believe a split is inevitable and preferable to continued infighting and paralysis." Some Anglicans opposed to various liberalising changes, in particular the ordination of women, have become Roman Catholics or Orthodox. Others have, at various times, joined the Continuing Anglican movement or departed for non-Anglican evangelical churches. Continuum The term "Continuing Anglicanism" refers to a number of church bodies which have formed outside of the Anglican Communion in the belief that traditional forms of Anglican faith, worship, and order have been unacceptably revised or abandoned within some Anglican Communion churches in recent decades. They therefore claim that they are "continuing" traditional Anglicanism. The modern Continuing Anglican movement principally dates to the Congress of St. Louis, held in the United States in 1977, where participants rejected changes that had been made in the Episcopal Church's Book of Common Prayer and also the Episcopal Church's approval of the ordination of women to the priesthood. More recent changes in the North American churches of the Anglican Communion, such as the introduction of same-sex marriage rites and the ordination of gay and lesbian people to the priesthood and episcopate, have created further separations. Continuing churches have generally been formed by people who have left the Anglican Communion. The original Anglican churches are charged by the Continuing Anglicans with being greatly compromised by secular cultural standards and liberal theology. Many Continuing Anglicans believe that the faith of some churches in communion with the Archbishop of Canterbury has become unorthodox and therefore have not sought to also be in communion with him. The original continuing parishes in the United States were found mainly in metropolitan areas. Since the late 1990s, a number have appeared in smaller communities, often as a result of a division in the town's existing Episcopal churches. The 2007–08 Directory of Traditional Anglican and Episcopal Parishes, published by the Fellowship of Concerned Churchmen, contained information on over 900 parishes affiliated with either the Continuing Anglican churches or the Anglican realignment movement, a more recent wave of Anglicans withdrawing from the Anglican Communion's North American provinces. Social activism A concern for social justice can be traced to very early Anglican beliefs, relating to an intertwined theology of God, nature, and humanity. The Anglican theologian Richard Hooker wrote in his book The Works of that Learned and Judicious Divine that "God hath created nothing simply for itself, but each thing in all things, and of every thing each part in other have such interest, that in the whole world nothing is found whereunto any thing created can say, 'I need thee not.'" Such statements demonstrate a theological Anglican interest in social activism, which has historically appeared in movements such as evangelical Anglican William Wilberforce's campaign against slavery in the 18th century, or 19th century issues concerning industrialisation. Working conditions and Christian socialism Lord Shaftesbury, a devout evangelical, campaigned to improve the conditions in factories, in mines, for chimney sweeps, and for the education of the very poor. For years, he was chairman of the Ragged School Board. Frederick Denison Maurice was a leading figure advocating reform, founding so-called "producer's co-operatives" and the Working Men's College. His work was instrumental in the establishment of the Christian socialist movement, although he himself was not in any real sense a socialist but "a Tory paternalist with the unusual desire to theories his acceptance of the traditional obligation to help the poor", influenced Anglo-Catholics such as Charles Gore, who wrote that "the principle of the incarnation is denied unless the Christian spirit can be allowed to concern itself with everything that interests and touches human life." Anglican focus on labour issues culminated in the work of William Temple in the 1930s and 1940s." Pacifism A question of whether or not Christianity is a pacifist religion has remained a matter of debate for Anglicans. The leading Anglican spokesman for pacifist ideas, from 1914 to 1945, was Ernest Barnes, bishop of Birmingham from 1924 to 1953. He opposed both world wars. In 1937, the Anglican Pacifist Fellowship emerged as a distinct reform organisation, seeking to make pacifism a clearly defined part of Anglican theology. The group rapidly gained popularity amongst Anglican intellectuals, including Vera Brittain, Evelyn Underhill, and the former British political leader George Lansbury. Furthermore, Dick Sheppard, who during the 1930s was one of Britain's most famous Anglican priests due to his landmark sermon broadcasts for BBC Radio, founded the Peace Pledge Union, a secular pacifist organisation for the non-religious that gained considerable support throughout the 1930s. Whilst never actively endorsed by Anglican churches, many Anglicans unofficially have adopted the Augustinian "Just War" doctrine. The Anglican Pacifist Fellowship remains highly active throughout the Anglican world. It rejects this doctrine of "just war" and seeks to reform the Church by reintroducing the pacifism inherent in the beliefs of many of the earliest Christians and present in their interpretation of Christ's Sermon on the Mount. The principles of the Anglican Pacifist Fellowship are often formulated as a statement of belief that "Jesus' teaching is incompatible with the waging of war ... that a Christian church should never support or justify war ... [and] that our Christian witness should include opposing the waging or justifying of war." Confusing the matter was that the 37th Article of Religion in the Book of Common Prayer states that "it is lawful for Christian men, at the commandment of the Magistrate, to wear weapons, and serve in the wars." Therefore, the Lambeth Council in the modern era has sought to provide a clearer position by repudiating modern war and developed a statement that has been affirmed at each subsequent meeting of the council. This statement was strongly reasserted when "the 67th General Convention of the Episcopal Church reaffirms the statement made by the Anglican Bishops assembled at Lambeth in 1978 and adopted by the 66th General Convention of the Episcopal Church in 1979, calling "Christian people everywhere ... to engage themselves in non-violent action for justice and peace and to support others so engaged, recognising that such action will be controversial and may be personally very costly... this General Convention, in obedience to this call, urges all members of this Church to support by prayer and by such other means as they deem appropriate, those who engaged in such non-violent action, and particularly those who suffer for conscience' sake as a result; and be it further Resolved, that this General Convention calls upon all members of this Church seriously to consider the implications for their own lives of this call to resist war and work for peace for their own lives." After World War II The focus on other social issues became increasingly diffuse after the Second World War. On the one hand, the growing independence and strength of Anglican churches in the Global South brought new emphasis to issues of global poverty, the inequitable distribution of resources, and the lingering effects of colonialism. In this regard, figures such as Desmond Tutu and Ted Scott were instrumental in mobilising Anglicans worldwide against the apartheid policies of South Africa. Rapid social change in the industrialised world during the 20th century compelled the church to examine issues of gender, sexuality, and marriage. Ordinariates within the Roman Catholic Church On 4 November 2009, Pope Benedict XVI issued an apostolic constitution, Anglicanorum Coetibus, to allow groups of former Anglicans to enter into full communion with the Roman Catholic Church as members of personal ordinariates. 20 October 2009 announcement of the imminent constitution mentioned: Pope Benedict XVI approved, within the apostolic constitution, a canonical structure that provides for personal ordinariates which will allow former Anglicans to enter full communion with the Roman Catholic Church while preserving elements of distinctive Anglican spiritual patrimony. For each personal ordinariate, the ordinary may be a former Anglican bishop or priest. It was expected that provision would be made to allow the retention of aspects of Anglican liturgy. Notes References Citations Sources Further reading Buchanan, Colin. Historical Dictionary of Anglicanism (2nd ed. 2015) excerpt External links Anglican Communion website What it means to be an Anglican article Anglican History website Anglicans Online website Online Anglican resources Protestant denominations established in the 16th century Christian denominations founded in Great Britain	9
Athens ( ; , ; , ) is a major coastal urban area in the Mediterranean, and it is both the capital and the largest city of Greece. With its urban area's population numbering over three million, it is also the eighth largest urban area in the European Union. Athens dominates and is the capital of the Attica region and is one of the world's oldest cities, with its recorded history spanning over 3,400 years, and its earliest human presence beginning somewhere between the 11th and 7th millennia BC. The city was named after Athena, the ancient Greek goddess of wisdom. Classical Athens was one of the most powerful city-states in ancient Greece. It was a centre for democracy, the arts, education and philosophy, and was highly influential throughout the European continent, particularly in Ancient Rome. For this reason, it is often regarded as the cradle of Western civilization and the birthplace of democracy in its own right independently from the rest of Greece. In modern times, Athens is a huge cosmopolitan metropolis and central to economic, financial, industrial, maritime, political and cultural life in Greece. In 2023, Athens metropolitan area and its surrounding municipalities (consisting the regional area of Attica) has a population of approximately 4.2 million. Athens is a Beta-status global city according to the Globalization and World Cities Research Network, and is one of the biggest economic centers in Southeastern Europe. It also has a large financial sector, and its port Piraeus is both the 2nd busiest passenger port in Europe, and the 13th largest container port in the world. The Municipality of Athens (also City of Athens), which constitutes a small administrative unit of the entire urban area, had a population of 698.567 (in 2023) within its official limits, and a land area of . The Athens metropolitan area or Greater Athens extends beyond its administrative municipal city limits as well as its urban agglomeration, with a population of 4,207,281 (in 2023) over an area of . Athens is also the southernmost capital on the European mainland. The heritage of the Classical Era is still evident in the city, represented by ancient monuments, and works of art, the most famous of all being the Parthenon, considered a key landmark of early Western culture. The city also retains Roman, Byzantine and a smaller number of Ottoman monuments, while its historical urban core features elements of continuity through its millennia of history. Athens is home to two UNESCO World Heritage Sites, the Acropolis of Athens and the medieval Daphni Monastery. Landmarks of the modern era, dating back to the establishment of Athens as the capital of the independent Greek state in 1834, include the Hellenic Parliament and the Architectural Trilogy of Athens, consisting of the National Library of Greece, the National and Kapodistrian University of Athens, and the Academy of Athens. Athens is also home to several museums and cultural institutions, such as the National Archeological Museum, featuring the world's largest collection of ancient Greek antiquities, the Acropolis Museum, the Museum of Cycladic Art, the Benaki Museum, and the Byzantine and Christian Museum. Athens was the host city of the first modern-day Olympic Games in 1896, and 108 years later it hosted the 2004 Summer Olympics, making it one of five cities to have hosted the Summer Olympics on multiple occasions. Athens joined the UNESCO Global Network of Learning Cities in 2016. Etymology and names In Ancient Greek, the name of the city was (Athênai, in Classical Attic) a plural. In earlier Greek, such as Homeric Greek, the name had been current in the singular form though, as (Athḗnē). It was possibly rendered in the plural later on, like those of (Thêbai) and (Μukênai). The root of the word is probably not of Greek or Indo-European origin, and is possibly a remnant of the Pre-Greek substrate of Attica. In antiquity, it was debated whether Athens took its name from its patron goddess Athena (Attic , Athēnâ, Ionic , Athḗnē, and Doric , Athā́nā) or Athena took her name from the city. Modern scholars now generally agree that the goddess takes her name from the city, because the ending -ene is common in names of locations, but rare for personal names. According to the ancient Athenian founding myth, Athena, the goddess of wisdom and war, competed against Poseidon, the God of the Seas, for patronage of the yet-unnamed city; they agreed that whoever gave the Athenians the better gift would become their patron and appointed Cecrops, the king of Athens, as the judge. According to the account given by Pseudo-Apollodorus, Poseidon struck the ground with his trident and a salt water spring welled up. In an alternative version of the myth from Vergil's poem Georgics, Poseidon instead gave the Athenians the first horse. In both versions, Athena offered the Athenians the first domesticated olive tree. Cecrops accepted this gift and declared Athena the patron goddess of Athens. Eight different etymologies, now commonly rejected, have been proposed since the 17th century. Christian Lobeck proposed as the root of the name the word (áthos) or (ánthos) meaning "flower", to denote Athens as the "flowering city". Ludwig von Döderlein proposed the stem of the verb , stem θη- (tháō, thē-, "to suck") to denote Athens as having fertile soil. Athenians were called cicada-wearers () because they used to wear pins of golden cicadas. A symbol of being autochthonous (earth-born), because the legendary founder of Athens, Erechtheus was an autochthon or of being musicians, because the cicada is a "musician" insect. In classical literature, the city was sometimes referred to as the City of the Violet Crown, first documented in Pindar's ἰοστέφανοι Ἀθᾶναι (iostéphanoi Athânai), or as (tò kleinòn ásty, "the glorious city"). During the medieval period, the name of the city was rendered once again in the singular as . Variant names included Setines, Satine, and Astines, all derivations involving false splitting of prepositional phrases. King Alphonse X of Castile gives the pseudo-etymology 'the one without death/ignorance'. In Ottoman Turkish, it was called Ātīnā, and in modern Turkish, it is Atina. History Antiquity The oldest known human presence in Athens is the Cave of Schist, which has been dated to between the 11th and 7th millennia BC. Athens has been continuously inhabited for at least 5,000 years (3000 BC). By 1400 BC, the settlement had become an important centre of the Mycenaean civilization, and the Acropolis was the site of a major Mycenaean fortress, whose remains can be recognised from sections of the characteristic Cyclopean walls. Unlike other Mycenaean centers, such as Mycenae and Pylos, it is not known whether Athens suffered destruction in about 1200 BC, an event often attributed to a Dorian invasion, and the Athenians always maintained that they were pure Ionians with no Dorian element. However, Athens, like many other Bronze Age settlements, went into economic decline for around 150 years afterwards. Iron Age burials, in the Kerameikos and other locations, are often richly provided for and demonstrate that from 900 BC onwards Athens was one of the leading centres of trade and prosperity in the region. By the sixth century BC, widespread social unrest led to the reforms of Solon. These would pave the way for the eventual introduction of democracy by Cleisthenes in 508 BC. Athens had by this time become a significant naval power with a large fleet, and helped the rebellion of the Ionian cities against Persian rule. In the ensuing Greco-Persian Wars Athens, together with Sparta, led the coalition of Greek states that would eventually repel the Persians, defeating them decisively at Marathon in 490 BC, and crucially at Salamis in 480 BC. However, this did not prevent Athens from being captured and sacked twice by the Persians within one year, after a heroic but ultimately failed resistance at Thermopylae by Spartans and other Greeks led by King Leonidas, after both Boeotia and Attica fell to the Persians. The decades that followed became known as the Golden Age of Athenian democracy, during which time Athens became the leading city of Ancient Greece, with its cultural achievements laying the foundations for Western civilization. The playwrights Aeschylus, Sophocles and Euripides flourished in Athens during this time, as did the historians Herodotus and Thucydides, the physician Hippocrates, and the philosopher Socrates. Guided by Pericles, who promoted the arts and fostered democracy, Athens embarked on an ambitious building program that saw the construction of the Acropolis of Athens (including the Parthenon), as well as empire-building via the Delian League. Originally intended as an association of Greek city-states to continue the fight against the Persians, the league soon turned into a vehicle for Athens's own imperial ambitions. The resulting tensions brought about the Peloponnesian War (431–404 BC), in which Athens was defeated by its rival Sparta. By the mid-4th century BC, the northern Greek kingdom of Macedon was becoming dominant in Athenian affairs. In 338 BC the armies of Philip II defeated an alliance of some of the Greek city-states including Athens and Thebes at the Battle of Chaeronea. Later, under Rome, Athens was given the status of a free city because of its widely admired schools. In the second century AD, The Roman emperor Hadrian, himself an Athenian citizen, ordered the construction of a library, a gymnasium, an aqueduct which is still in use, several temples and sanctuaries, a bridge and financed the completion of the Temple of Olympian Zeus. In the early 4th century AD, the Eastern Roman Empire began to be governed from Constantinople, and with the construction and expansion of the imperial city, many of Athens's works of art were taken by the emperors to adorn it. The Empire became Christianized, and the use of Latin declined in favour of exclusive use of Greek; in the Roman imperial period, both languages had been used. In the later Roman period, Athens was ruled by the emperors continuing until the 13th century, its citizens identifying themselves as citizens of the Roman Empire ("Rhomaioi"). The conversion of the empire from paganism to Christianity greatly affected Athens, resulting in reduced reverence for the city. Ancient monuments such as the Parthenon, Erechtheion and the Hephaisteion (Theseion) were converted into churches. As the empire became increasingly anti-pagan, Athens became a provincial town and experienced fluctuating fortunes. The city remained an important center of learning, especially of Neoplatonism—with notable pupils including Gregory of Nazianzus, Basil of Caesarea and emperor Julian ()—and consequently a center of paganism. Christian items do not appear in the archaeological record until the early 5th century. The sack of the city by the Herules in 267 and by the Visigoths under their king Alaric I () in 396, however, dealt a heavy blow to the city's fabric and fortunes, and Athens was henceforth confined to a small fortified area that embraced a fraction of the ancient city. The emperor Justinian I () banned the teaching of philosophy by pagans in 529, an event whose impact on the city is much debated, but is generally taken to mark the end of the ancient history of Athens. Athens was sacked by the Slavs in 582, but remained in imperial hands thereafter, as highlighted by the visit of the emperor Constans II () in 662/3 and its inclusion in the Theme of Hellas. Middle Ages The city was threatened by Saracen raids in the 8th–9th centuries—in 896, Athens was raided and possibly occupied for a short period, an event which left some archaeological remains and elements of Arabic ornamentation in contemporary buildings—but there is also evidence of a mosque existing in the city at the time. In the great dispute over Byzantine Iconoclasm, Athens is commonly held to have supported the iconophile position, chiefly due to the role played by Empress Irene of Athens in the ending of the first period of Iconoclasm at the Second Council of Nicaea in 787. A few years later, another Athenian, Theophano, became empress as the wife of Staurakios (r. 811–812). Invasion of the empire by the Turks after the Battle of Manzikert in 1071, and the ensuing civil wars, largely passed the region by and Athens continued its provincial existence unharmed. When the Byzantine Empire was rescued by the resolute leadership of the three Komnenos emperors Alexios, John and Manuel, Attica and the rest of Greece prospered. Archaeological evidence tells us that the medieval town experienced a period of rapid and sustained growth, starting in the 11th century and continuing until the end of the 12th century. The Agora (marketplace) had been deserted since late antiquity, began to be built over, and soon the town became an important centre for the production of soaps and dyes. The growth of the town attracted the Venetians, and various other traders who frequented the ports of the Aegean, to Athens. This interest in trade appears to have further increased the economic prosperity of the town. The 11th and 12th centuries were the Golden Age of Byzantine art in Athens. Almost all of the most important Middle Byzantine churches in and around Athens were built during these two centuries, and this reflects the growth of the town in general. However, this medieval prosperity was not to last. In 1204, the Fourth Crusade conquered Athens and the city was not recovered from the Latins before it was taken by the Ottoman Turks. It did not become Greek in government again until the 19th century. From 1204 until 1458, Athens was ruled by Latins in three separate periods, following the Crusades. The "Latins", or "Franks", were western Europeans and followers of the Latin Church brought to the Eastern Mediterranean during the Crusades. Along with rest of Byzantine Greece, Athens was part of the series of feudal fiefs, similar to the Crusader states established in Syria and on Cyprus after the First Crusade. This period is known as the Frankokratia. Ottoman Athens The first Ottoman attack on Athens, which involved a short-lived occupation of the town, came in 1397, under the Ottoman generals Yaqub Pasha and Timurtash. Finally, in 1458, Athens was captured by the Ottomans under the personal leadership of Sultan Mehmed II. As the Ottoman Sultan rode into the city, he was greatly struck by the beauty of its ancient monuments and issued a firman (imperial edict) forbidding their looting or destruction, on pain of death. The Parthenon was converted into the main mosque of the city. Under Ottoman rule, Athens was denuded of any importance and its population severely declined, leaving it as a "small country town" (Franz Babinger). From the early 17th century, Athens came under the jurisdiction of the Kizlar Agha, the chief black eunuch of the Sultan's harem. The city had originally been granted by Sultan Ahmed I () to Basilica, one of his favourite concubines, who hailed from the city, in response of complaints of maladministration by the local governors. After her death, Athens came under the purview of the Kizlar Agha. The Turks began a practice of storing gunpowder and explosives in the Parthenon and Propylaea. In 1640, a lightning bolt struck the Propylaea, causing its destruction. In 1687, during the Morean War, the Acropolis was besieged by the Venetians under Francesco Morosini, and the temple of Athena Nike was dismantled by the Ottomans to fortify the Parthenon. A shot fired during the bombardment of the Acropolis caused a powder magazine in the Parthenon to explode (26 September), and the building was severely damaged, giving it largely the appearance it has today. The Venetian occupation of Athens lasted for six months, and both the Venetians and the Ottomans participated in the looting of the Parthenon. One of its western pediments was removed, causing even more damage to the structure. During the Venetian occupation, the two mosques of the city were converted into Catholic and Protestant churches, but on 9 April 1688 the Venetians abandoned Athens again to the Ottomans. Modern history In 1822, a Greek insurgency captured the city, but it fell to the Ottomans again in 1826 (though Acropolis held till June 1827). Again the ancient monuments suffered badly. The Ottoman forces remained in possession until March 1833, when they withdrew. At that time, the city (as throughout the Ottoman period) had a small population of an estimated 400 houses, mostly located around the Acropolis in the Plaka. Following the Greek War of Independence and the establishment of the Greek Kingdom, Athens was chosen to replace Nafplio as the second capital of the newly independent Greek state in 1834, largely because of historical and sentimental reasons. At the time, after the extensive destruction it had suffered during the war of independence, it was reduced to a town of about 4,000 people (less than half its earlier population) in a loose swarm of houses along the foot of the Acropolis. The first King of Greece, Otto of Bavaria, commissioned the architects Stamatios Kleanthis and Eduard Schaubert to design a modern city plan fit for the capital of a state. The first modern city plan consisted of a triangle defined by the Acropolis, the ancient cemetery of Kerameikos and the new palace of the Bavarian king (now housing the Greek Parliament), so as to highlight the continuity between modern and ancient Athens. Neoclassicism, the international style of this epoch, was the architectural style through which Bavarian, French and Greek architects such as Hansen, Klenze, Boulanger or Kaftantzoglou designed the first important public buildings of the new capital. In 1896, Athens hosted the first modern Olympic Games. During the 1920s a number of Greek refugees, expelled from Asia Minor after the Greco-Turkish War and Greek genocide, swelled Athens's population; nevertheless it was most particularly following World War II, and from the 1950s and 1960s, that the population of the city exploded, and Athens experienced a gradual expansion. In the 1980s, it became evident that smog from factories and an ever-increasing fleet of automobiles, as well as a lack of adequate free space due to congestion, had evolved into the city's most important challenge. A series of anti-pollution measures taken by the city's authorities in the 1990s, combined with a substantial improvement of the city's infrastructure (including the Attiki Odos motorway, the expansion of the Athens Metro, and the new Athens International Airport), considerably alleviated pollution and transformed Athens into a much more functional city. In 2004, Athens hosted the 2004 Summer Olympics. Geography Athens sprawls across the central plain of Attica that is often referred to as the Athens Basin or the Attica Basin (). The basin is bounded by four large mountains: Mount Aigaleo to the west, Mount Parnitha to the north, Mount Pentelicus to the northeast and Mount Hymettus to the east. Beyond Mount Aegaleo lies the Thriasian plain, which forms an extension of the central plain to the west. The Saronic Gulf lies to the southwest. Mount Parnitha is the tallest of the four mountains (), and has been declared a national park. The Athens urban area spreads over from Agios Stefanos in the north to Varkiza in the south. The city is located in the north temperate zone, 38 degrees north of the equator. Athens is built around a number of hills. Lycabettus is one of the tallest hills of the city proper and provides a view of the entire Attica Basin. The meteorology of Athens is deemed to be one of the most complex in the world because its mountains cause a temperature inversion phenomenon which, along with the Greek government's difficulties controlling industrial pollution, was responsible for the air pollution problems the city has faced. This issue is not unique to Athens; for instance, Los Angeles and Mexico City also suffer from similar atmospheric inversion problems. The Cephissus river, the Ilisos and the Eridanos stream are the historical rivers of Athens. Environment By the late 1970s, the pollution of Athens had become so destructive that according to the then Greek Minister of Culture, Constantine Trypanis, "...the carved details on the five the caryatids of the Erechtheum had seriously degenerated, while the face of the horseman on the Parthenon's west side was all but obliterated." A series of measures taken by the authorities of the city throughout the 1990s resulted in the improvement of air quality; the appearance of smog (or nefos as the Athenians used to call it) has become less common. Measures taken by the Greek authorities throughout the 1990s have improved the quality of air over the Attica Basin. Nevertheless, air pollution still remains an issue for Athens, particularly during the hottest summer days. In late June 2007, the Attica region experienced a number of brush fires, including a blaze that burned a significant portion of a large forested national park in Mount Parnitha, considered critical to maintaining a better air quality in Athens all year round. Damage to the park has led to worries over a stalling in the improvement of air quality in the city. The major waste management efforts undertaken in the last decade (particularly the plant built on the small island of Psytalia) have greatly improved water quality in the Saronic Gulf, and the coastal waters of Athens are now accessible again to swimmers. Parks and zoos Parnitha National Park is punctuated by well-marked paths, gorges, springs, torrents and caves dotting the protected area. Hiking and mountain-biking in all four mountains are popular outdoor activities for residents of the city. The National Garden of Athens was completed in 1840 and is a green refuge of 15.5 hectares in the centre of the Greek capital. It is to be found between the Parliament and Zappeion buildings, the latter of which maintains its own garden of seven hectares. Parts of the City Centre have been redeveloped under a masterplan called the Unification of Archeological Sites of Athens, which has also gathered funding from the EU to help enhance the project. The landmark Dionysiou Areopagitou Street has been pedestrianised, forming a scenic route. The route starts from the Temple of Olympian Zeus at Vasilissis Olgas Avenue, continues under the southern slopes of the Acropolis near Plaka, and finishes just beyond the Temple of Hephaestus in Thiseio. The route in its entirety provides visitors with views of the Parthenon and the Agora (the meeting point of ancient Athenians), away from the busy City Centre. The hills of Athens also provide green space. Lycabettus, Philopappos hill and the area around it, including Pnyx and Ardettos hill, are planted with pines and other trees, with the character of a small forest rather than typical metropolitan parkland. Also to be found is the Pedion tou Areos (Field of Mars) of 27.7 hectares, near the National Archaeological Museum. Athens' largest zoo is the Attica Zoological Park, a private zoo located in the suburb of Spata. The zoo is home to around 2000 animals representing 400 species, and is open 365 days a year. Smaller zoos exist within public gardens or parks, such as the zoo within the National Garden of Athens. Climate Athens has a hot-summer Mediterranean climate (Köppen climate classification: Csa). According to the meteorological station near the city center which is operated by the National Observatory of Athens, the downtown area has an annual average temperature of while parts of the urban agglomeration may reach up to , being affected by the urban heat island effect. Athens receives about of precipitation per year, largely concentrated during the colder half of the year with the remaining rainfall falling sparsely, mainly during thunderstorms. Fog is rare in the city center, but somewhat more frequent in areas to the east, close to mount Hymettus. The southern section of the Athens metropolitan area (i.e., Elliniko, Athens Riviera) lies in the transitional zone between Mediterranean (Csa) and hot semi-arid climate (BSh), with its port-city of Piraeus being the most extreme example, receiving just per year. The areas to the south generally see less extreme temperature variations as their climate is moderated by the Saronic gulf. The northern part of the city (i.e., Kifissia), owing to its higher elevation, features moderately lower temperatures and slightly increased precipitation year-round. The generally dry climate of the Athens basin compared to the precipitation amounts seen in a typical Mediterranean climate is due to the rain shadow effect caused by the Pindus mountain range and the Dirfys and Parnitha mountains, substantially drying the westerly and northerly winds respectively. Snowfall is not very common, though it occurs almost annually, but it usually does not cause heavy disruption to daily life, in contrast to the northern parts of the city, where blizzards occur on a somewhat more regular basis. The most recent examples include the snowstorms of 16 February 2021 and 24 January 2022, when the entire urban area was blanketed in snow. Athens may get particularly hot in the summer, owing partly to the strong urban heat island effect characterizing the city. In fact, Athens is considered to be the hottest city in mainland Europe, and it's the first city in Europe to appoint a chief heat officer to deal with severe heat waves. Temperatures of 47.5°C have been reported in several locations of the metropolitan area, including within the urban agglomeration. Metropolitan Athens was until 2021 the holder of the World Meteorological Organization record for the highest temperature ever recorded in Europe with which was recorded in the areas of Elefsina and Tatoi on 10 July 1977. Administration Athens became the capital of Greece in 1834, following Nafplion, which was the provisional capital from 1829. The municipality (City) of Athens is also the capital of the Attica region. The term Athens can refer either to the Municipality of Athens, to Greater Athens or urban area, or to the entire Athens Metropolitan Area. The large City Centre () of the Greek capital falls directly within the Municipality of Athens or Athens Municipality ()—also City of Athens. Athens Municipality is the largest in population size in Greece. Piraeus also forms a significant city centre on its own within the Athens Urban Area and it is the second largest in population size within it. Athens Urban Area The Athens Urban Area (), also known as Urban Area of the Capital () or Greater Athens (), today consists of 40 municipalities, 35 of which make up what was referred to as the former Athens Prefecture municipalities, located within 4 regional units (North Athens, West Athens, Central Athens, South Athens); and a further 5 municipalities, which make up the former Piraeus Prefecture municipalities, located within the regional unit of Piraeus as mentioned above. The Athens Municipality forms the core and center of Greater Athens, which in its turn consists of the Athens Municipality and 40 more municipalities, divided in four regional units (Central, North, South and West Athens), accounting for 2,611,713 people (in 2021) within an area of . Until 2010, which made up the abolished Athens Prefecture and the municipality of Piraeus, the historic Athenian port, with 4 other municipalities make up the regional unit of Piraeus. The regional units of Central Athens, North Athens, South Athens, West Athens and Piraeus with part of East and West Attica regional units combined make up the continuous Athens Urban Area, also called the "Urban Area of the Capital" or simply "Athens" (the most common use of the term), spanning over , with a population of 4,200,764 people as of 2021. The Athens Urban Area is considered to form the city of Athens as a whole, despite its administrative divisions, which is the largest in Greece and the 9th most populated urban area in Europe. Athens metropolitan area The Athens metropolitan area spans within the Attica region and includes a total of 58 municipalities, which are organized in seven regional units (those outlined above, along with East Attica and West Attica), having reached a population of 3,744,059 according to the 2021 census. Athens and Piraeus municipalities serve as the two metropolitan centres of the Athens Metropolitan Area. There are also some inter-municipal centres serving specific areas. For example, Kifissia and Glyfada serve as inter-municipal centres for northern and southern suburbs respectively. The Athens Metropolitan Area consists of 58 densely populated municipalities, sprawling around the Municipality of Athens (the City Centre) in virtually all directions. For the Athenians, all the urban municipalities surrounding the City Centre are called suburbs. According to their geographic location in relation to the City of Athens, the suburbs are divided into four zones; the northern suburbs (including Agios Stefanos, Dionysos, Ekali, Nea Erythraia, Kifissia, Kryoneri, Maroussi, Pefki, Lykovrysi, Metamorfosi, Nea Ionia, Nea Filadelfeia, Irakleio, Vrilissia, Melissia, Penteli, Chalandri, Agia Paraskevi, Gerakas, Pallini, Galatsi, Psychiko and Filothei); the southern suburbs (including Alimos, Nea Smyrni, Moschato, Tavros, Agios Ioannis Renti, Kallithea, Piraeus, Agios Dimitrios, Palaio Faliro, Elliniko, Glyfada, Lagonisi, Saronida, Argyroupoli, Ilioupoli, Varkiza, Voula, Vari and Vouliagmeni); the eastern suburbs (including Zografou, Dafni, Vyronas, Kaisariani, Cholargos and Papagou); and the western suburbs (including Peristeri, Ilion, Egaleo, Koridallos, Agia Varvara, Keratsini, Perama, Nikaia, Drapetsona, Chaidari, Petroupoli, Agioi Anargyroi, Ano Liosia, Aspropyrgos, Eleusina, Acharnes and Kamatero). The Athens city coastline, extending from the major commercial port of Piraeus to the southernmost suburb of Varkiza for some , is also connected to the City Centre by tram. In the northern suburb of Maroussi, the upgraded main Olympic Complex (known by its Greek acronym OAKA) dominates the skyline. The area has been redeveloped according to a design by the Spanish architect Santiago Calatrava, with steel arches, landscaped gardens, fountains, futuristic glass, and a landmark new blue glass roof which was added to the main stadium. A second Olympic complex, next to the sea at the beach of Palaio Faliro, also features modern stadia, shops and an elevated esplanade. Work is underway to transform the grounds of the old Athens Airport – named Elliniko – in the southern suburbs, into one of the largest landscaped parks in Europe, to be named the Hellenikon Metropolitan Park. Many of the southern suburbs (such as Alimos, Palaio Faliro, Elliniko, Glyfada, Voula, Vouliagmeni and Varkiza) known as the Athens Riviera, host a number of sandy beaches, most of which are operated by the Greek National Tourism Organisation and require an entrance fee. Casinos operate on both Mount Parnitha, some from downtown Athens (accessible by car or cable car), and the nearby town of Loutraki (accessible by car via the Athens – Corinth National Highway, or the Athens Suburban Railway). Twin towns – sister cities The concept of a partner city is used under different names in different countries, but they mean the same thing, that two cities in different countries assist each other as partners. Athens has quite a number of partners, whether as a "twin", a "sister", or a "partner." Demographics The Municipality of Athens has an official population of 643,452 people (in 2021). According to the 2021 Population and Housing Census, The four regional units that make up what is referred to as Greater Athens have a combined population of 2,611,713 . They together with the regional unit of Piraeus (Greater Piraeus) make up the dense Athens Urban Area which reaches a total population of 3,059,764 inhabitants (in 2021). The municipality (Center) of Athens is the most populous in Greece, with a population of 643,452 people (in 2021) and an area of , forming the core of the Athens Urban Area within the Attica Basin. The incumbent Mayor of Athens is Kostas Bakoyannis of New Democracy. The municipality is divided into seven municipal districts which are mainly used for administrative purposes. For the Athenians the most popular way of dividing the downtown is through its neighbourhoods such as Pagkrati, Ampelokipoi, Goudi, Exarcheia, Patisia, Ilisia, Petralona, Plaka, Anafiotika, Koukaki, Kolonaki and Kypseli, each with its own distinct history and characteristics. Metropolitan Area The Athens Metropolitan Area, with an area of and inhabited by 3,744,059 people in 2021, consists of the Athens Urban Area with the addition of the towns and villages of East and West Attica, which surround the dense urban area of the Greek capital. It actually sprawls over the whole peninsula of Attica, which is the best part of the region of Attica, excluding the islands. Safety Athens ranks in the lowest percentage for the risk on frequency and severity of terrorist attacks according to the EU Global Terrorism Database (EIU 2007–2016 calculations). The city also ranked 35th in Digital Security, 21st on Health Security, 29th on Infrastructure Security and 41st on Personal Security globally in a 2017 The Economist Intelligence Unit report. It also ranks as a very safe city (39th globally out of 162 cities overall) on the ranking of the safest and most dangerous countries. As May 2022 the crime index from Numbeo places Athens at 56.33 (moderate), while its safety index is at 43.68.Crime in Athens According to a Mercer 2019 Quality of Living Survey, Athens ranks 89th on the Mercer Quality of Living Survey ranking. Economy Athens is the financial capital of Greece. According to data from 2014, Athens as a metropolitan economic area produced US$130 billion as GDP in PPP, which consists of nearly half of the production for the whole country. Athens was ranked 102nd in that year's list of global economic metropolises, while GDP per capita for the same year was 32,000 US-dollars. Athens is one of the major economic centres in south-eastern Europe and is considered a regional economic power. The port of Piraeus, where big investments by COSCO have already been delivered during the recent decade, the completion of the new Cargo Centre in Thriasion, the expansion of the Athens Metro and the Athens Tram, as well as the Hellenikon metropolitan park redevelopment in Elliniko and other urban projects, are the economic landmarks of the upcoming years. Prominent Greek companies such as Hellas Sat, Hellenic Aerospace Industry, Mytilineos Holdings, Titan Cement, Hellenic Petroleum, Papadopoulos E.J., Folli Follie, Jumbo S.A., OPAP, and Cosmote have their headquarters in the metropolitan area of Athens. Multinational companies such as Ericsson, Sony, Siemens, Motorola, Samsung, Microsoft, Teleperformance, Novartis, Mondelez and Coca-Cola also have their regional research and development headquarters in the city. The banking sector is represented by National Bank of Greece, Alpha Bank, Eurobank, and Piraeus Bank, while the Bank of Greece is also situated in the City Centre. The Athens Stock Exchange was severely hit by the Greek government-debt crisis and the decision of the government to proceed into capital controls during summer 2015. As a whole the economy of Athens and Greece was strongly affected, while data showed a change from long recession to growth of 1.4% from 2017 onwards. Tourism is also a leading contributor to the economy of the city, as one of Europe's top destinations for city-break tourism, and also the gateway for excursions to both the islands and other parts of the mainland. Greece attracted 26.5 million visitors in 2015, 30.1 million visitors in 2017, and over 33 million in 2018, making Greece one of the most visited countries in Europe and the world, and contributing 18% to the country's GDP. Athens welcomed more than 5 million tourists in 2018, and 1.4 million were "city-breakers"; this was an increase by over a million city-breakers since 2013. Tourism Athens has been a destination for travellers since antiquity. Over the past decade, the city's infrastructure and social amenities have improved, in part because of its successful bid to stage the 2004 Olympic Games. The Greek Government, aided by the EU, has funded major infrastructure projects such as the state-of-the-art Eleftherios Venizelos International Airport, the expansion of the Athens Metro system, and the new Attiki Odos Motorway. Transport Athens is the country's major transportation hub. The city has Greece's largest airport and its largest port; Piraeus, too, is the largest container transport port in the Mediterranean, and the largest passenger port in Europe. Athens is a major national hub for Intercity (Ktel) and international buses, as well as for domestic and international rail transport. Public transport is serviced by a variety of transportation means, making up the country's largest mass transit system. Transport for Athens operates a large bus and trolleybus fleet, the city's Metro, a Suburban Railway service and a tram network, connecting the southern suburbs to the city centre. Bus transport OSY () (Odikes Sygkoinonies S.A.), a subsidiary company of OASA (Athens urban transport organisation), is the main operator of buses and trolleybuses in Athens. As of 2017, its network consists of around 322 bus lines, spanning the Athens Metropolitan Area, and making up a fleet of 2,375 buses and trolleybuses. Of those 2,375, 619 buses run on compressed natural gas, making up the largest fleet of natural gas-powered buses in Europe, and 354 are electric-powered (trolleybuses). All of the 354 trolleybuses are equipped to run on diesel in case of power failure. International links are provided by a number of private companies. National and regional bus links are provided by KTEL from two InterCity Bus Terminals; Kifissos Bus Terminal A and Liosion Bus Terminal B, both located in the north-western part of the city. Kifissos provides connections towards Peloponnese, North Greece, West Greece and some Ionian Islands, whereas Liosion is used for most of Central Greece. Railways Athens is the hub of the country's national railway system (OSE), connecting the capital with major cities across Greece and abroad (Istanbul, Sofia, Belgrade and Bucharest). The Athens Suburban Railway, referred to as the Proastiakos, connects Athens International Airport to the city of Kiato, west of Athens, via Larissa station, the city's central rail station and the port of Piraeus. The length of Athens's commuter rail network extends to , and is expected to stretch to by 2010. The Athens Metro is operated by STASY S.A. () (Statheres Sygkoinonies S.A.), a subsidiary company of OASA (Athens urban transport organisation), which provides public transport throughout the Athens Urban Area. While its main purpose is transport, it also houses Greek artifacts found during the construction of the system. The Athens Metro runs three metro lines, namely Line 1 (Green Line), Line 2 (Red Line) and Line 3 (Blue Line) lines, of which the first was constructed in 1869, and the other two largely during the 1990s, with the initial new sections opened in January 2000. Line 1 mostly runs at ground level and the other two (Line 2 & 3) routes run entirely underground. A fleet of 42 trains, using 252 carriages, operates on the network, with a daily occupancy of 1,353,000 passengers. Line 1 (Green Line) serves 24 stations, and is the oldest line of the Athens metro network. It runs from Piraeus station to Kifissia station and covers a distance of . There are transfer connections with the Blue Line 3 at Monastiraki station and with the Red Line 2 at Omonia and Attiki stations. Line 2 (Red Line) runs from Anthoupoli station to Elliniko station and covers a distance of . The line connects the western suburbs of Athens with the southeast suburbs, passing through the center of Athens. The Red Line has transfer connections with the Green Line 1 at Attiki and Omonia stations. There are also transfer connections with the Blue Line 3 at Syntagma station and with the tram at Syntagma, Syngrou Fix and Neos Kosmos stations. Line 3 (Blue Line) runs from Dimotiko Theatro station, through the central Monastiraki and Syntagma stations to Doukissis Plakentias avenue in the northeastern suburb of Halandri. It then ascends to ground level and continues to Athens International Airport Eleftherios Venizelos using the suburban railway infrastructure, extending its total length to . The spring 2007 extension from Monastiraki westwards to Egaleo connected some of the main night life hubs of the city, namely those of Gazi (Kerameikos station) with Psirri (Monastiraki station) and the city centre (Syntagma station).The new stations Maniatika, Piraeus and Dimotiko Theatro, were completed in October 10, 2022, connecting the biggest port of Greece, the Port of Piraeus, with Athens International Airport, the biggest airport of Greece. The Athens Tram is operated by STASY S.A. (Statheres Sygkoinonies S.A.), a subsidiary company of Transport for Athens (OASA). It has a fleet of 35 Sirio type vehicles and 25 Alstom Citadis type vehicles which serve 48 stations, employ 345 people with an average daily occupancy of 65,000 passengers. The tram network spans a total length of and covers ten Athenian suburbs. The network runs from Syntagma Square to the southwestern suburb of Palaio Faliro, where the line splits in two branches; the first runs along the Athens coastline toward the southern suburb of Voula, while the other heads toward Neo Faliro. The network covers the majority of the Athens coastline. Further extension is under construction towards the major commercial port of Piraeus. The expansion to Piraeus will include 12 new stations, increase the overall length of tram route by , and increase the overall transportation network. Athens International Airport Athens is served by the Athens International Airport (ATH), located near the town of Spata, in the eastern Messoghia plain, some east of center of Athens. The airport, awarded the "European Airport of the Year 2004" Award, is intended as an expandable hub for air travel in southeastern Europe and was constructed in 51 months, costing 2.2 billion euros. It employs a staff of 14,000. Ferry The Port of Piraeus is the largest port in Greece and one of the largest in Europe. Rafina and Lavrio act as alternative ports of Athens, connects the city with numerous Greek islands of the Aegean Sea, Evia and Çeşme in Turkey, while also serving the cruise ships that arrive. Motorways Two main motorways of Greece begin in Athens, namely the A1/E75, heading north towards Greece's second largest city, Thessaloniki; and the border crossing of Evzones and the A8/E94 heading west, towards Greece's third largest city, Patras, which incorporated the GR-8A. Before their completion much of the road traffic used the GR-1 and the GR-8. Athens' Metropolitan Area is served by the motorway network of the Attiki Odos toll-motorway (code: A6). Its main section extends from the western industrial suburb of Elefsina to Athens International Airport; while two beltways, namely the Aigaleo Beltway (A65) and the Hymettus Beltway (A64) serve parts of western and eastern Athens respectively. The span of the Attiki Odos in all its length is , making it the largest metropolitan motorway network in all of Greece. Education Located on Panepistimiou Street, the old campus of the University of Athens, the National Library, and the Athens Academy form the "Athens Trilogy" built in the mid-19th century. The largest and oldest university in Athens is the National and Kapodistrian University of Athens. Most of the functions of NKUA have been transferred to a campus in the eastern suburb of Zografou. The National Technical University of Athens is located on Patision Street. The University of West Attica is the second largest university in Athens. The seat of the university is located in the western area of Athens, where the philosophers of Ancient Athens delivered lectures. All the activities of UNIWA are carried out in the modern infrastructure of the three University Campuses within the metropolitan region of Athens (Egaleo Park, Ancient Olive Groove and Athens), which offer modern teaching and research spaces, entertainment and support facilities for all students. Other universities that lie within Athens are the Athens University of Economics and Business, the Panteion University, the Agricultural University of Athens and the University of Piraeus. There are overall ten state-supported Institutions of Higher (or Tertiary) education located in the Athens Urban Area, these are by chronological order: Athens School of Fine Arts (1837), National Technical University of Athens (1837), National and Kapodistrian University of Athens (1837), Agricultural University of Athens (1920), Athens University of Economics and Business (1920), Panteion University of Social and Political Sciences (1927), University of Piraeus (1938), Harokopio University of Athens (1990), School of Pedagogical and Technological Education (2002), University of West Attica (2018). There are also several other private colleges, as they called formally in Greece, as the establishment of private universities is prohibited by the constitution. Many of them are accredited by a foreign state or university such as the American College of Greece and the Athens Campus of the University of Indianapolis. Culture Archaeological hub and museums The city is a world centre of archaeological research. Alongside national academic institutions, such as the Athens University and the Archaeological Society, it is home to multiple archaeological museums, taking in the National Archaeological Museum, the Cycladic Museum, the Epigraphic Museum, the Byzantine & Christian Museum, as well as museums at the ancient Agora, Acropolis, Kerameikos, and the Kerameikos Archaeological Museum. The city is also the setting for the Demokritos laboratory for Archaeometry, alongside regional and national archaeological authorities forming part of the Greek Department of Culture. Athens hosts 17 Foreign Archaeological Institutes which promote and facilitate research by scholars from their home countries. As a result, Athens has more than a dozen archaeological libraries and three specialized archaeological laboratories, and is the venue of several hundred specialized lectures, conferences and seminars, as well as dozens of archaeological exhibitions each year. At any given time, hundreds of international scholars and researchers in all disciplines of archaeology are to be found in the city. Athens' most important museums include: the National Archaeological Museum, the largest archaeological museum in the country, and one of the most important internationally, as it contains a vast collection of antiquities. Its artefacts cover a period of more than 5,000 years, from late Neolithic Age to Roman Greece; the Benaki Museum with its several branches for each of its collections including ancient, Byzantine, Ottoman-era, Chinese art and beyond; the Byzantine and Christian Museum, one of the most important museums of Byzantine art; the National Art Gallery, the nation's eponymous leading gallery, which reopened in 2021 after renovation; the National Museum of Contemporary Art, which opened in 2000 in a former brewery building; the Numismatic Museum, housing a major collection of ancient and modern coins; the Museum of Cycladic Art, home to an extensive collection of Cycladic art, including its famous figurines of white marble; the New Acropolis Museum, opened in 2009, and replacing the old museum on the Acropolis. The new museum has proved considerably popular; almost one million people visited during the summer period June–October 2009 alone. A number of smaller and privately owned museums focused on Greek culture and arts are also to be found. the Kerameikos Archaeological Museum, a museum which displays artifacts from the burial site of Kerameikos. Much of the pottery and other artifacts relate to Athenian attitudes towards death and the afterlife, throughout many ages. the Jewish Museum of Greece, a museum which describes the history and culture of the Greek Jewish community. Architecture Athens incorporates architectural styles ranging from Greco-Roman and Neoclassical to Modern. They are often to be found in the same areas, as Athens is not marked by a uniformity of architectural style. A visitor will quickly notice the absence of tall buildings: Athens has very strict height restriction laws in order to ensure the Acropolis Hill is visible throughout the city. Despite the variety in styles, there is evidence of continuity in elements of the architectural environment throughout the city's history. For the greatest part of the 19th century Neoclassicism dominated Athens, as well as some deviations from it such as Eclecticism, especially in the early 20th century. Thus, the Old Royal Palace was the first important public building to be built, between 1836 and 1843. Later in the mid and late 19th century, Theophil Freiherr von Hansen and Ernst Ziller took part in the construction of many neoclassical buildings such as the Athens Academy and the Zappeion Hall. Ziller also designed many private mansions in the centre of Athens which gradually became public, usually through donations, such as Schliemann's Iliou Melathron. Beginning in the 1920s, modern architecture including Bauhaus and Art Deco began to exert an influence on almost all Greek architects, and buildings both public and private were constructed in accordance with these styles. Localities with a great number of such buildings include Kolonaki, and some areas of the centre of the city; neighbourhoods developed in this period include Kypseli. In the 1950s and 1960s during the extension and development of Athens, other modern movements such as the International style played an important role. The centre of Athens was largely rebuilt, leading to the demolition of a number of neoclassical buildings. The architects of this era employed materials such as glass, marble and aluminium, and many blended modern and classical elements. After World War II, internationally known architects to have designed and built in the city included Walter Gropius, with his design for the US Embassy, and, among others, Eero Saarinen, in his postwar design for the east terminal of the Ellinikon Airport. Urban sculpture Across the city numerous statues or busts are to be found. Apart from the neoclassicals by Leonidas Drosis at the Academy of Athens (Plato, Socrates, Apollo and Athena), others in notable categories include the statue of Theseus by Georgios Fytalis at Thiseion; depictions of philhellenes such as Lord Byron, George Canning, and William Gladstone; the equestrian statue of Theodoros Kolokotronis by Lazaros Sochos in front of the Old Parliament; statues of Ioannis Kapodistrias, Rigas Feraios and Adamantios Korais at the University; of Evangelos Zappas and Konstantinos Zappas at the Zappeion; Ioannis Varvakis at the National Garden; the" Woodbreaker" by Dimitrios Filippotis; the equestrian statue of Alexandros Papagos in the Papagou district; and various busts of fighters of Greek independence at the Pedion tou Areos. A significant landmark is also the Tomb of the Unknown Soldier in Syntagma. Entertainment and performing arts Athens is home to 148 theatrical stages, more than any other city in the world, including the ancient Odeon of Herodes Atticus, home to the Athens Festival, which runs from May to October each year. In addition to a large number of multiplexes, Athens plays host to open air garden cinemas. The city also supports music venues, including the Athens Concert Hall (Megaro Moussikis), which attracts world class artists. The Athens Planetarium, located in Andrea Syngrou Avenue, in Palaio Faliro is one of the largest and best equipped digital planetaria in the world. The Stavros Niarchos Foundation Cultural Center, inaugurated in 2016, will house the National Library of Greece and the Greek National Opera. In 2018 Athens was designated as the World Book Capital by UNESCO. Restaurants, tavernas and bars can be found in the entertainment hubs in Plaka and the Trigono areas of the historic centre, the inner suburbs of Gazi and Psyrri are especially busy with nightclubs and bars, while Kolonaki, Exarchia, Metaxourgeio, Koukaki and Pangrati offer more of a cafe and restaurant scene. The coastal suburbs of Microlimano, Alimos and Glyfada include many tavernas, beach bars and busy summer clubs. The most successful songs during the period 1870–1930 were the Athenian serenades (Αθηναϊκές καντάδες), based on the Heptanesean kantádhes (καντάδες 'serenades'; sing.: καντάδα) and the songs performed on stage (επιθεωρησιακά τραγούδια 'theatrical revue songs') in revues, musical comedies, operettas and nocturnes that were dominating Athens' theatre scene. In 1922, following the war, genocide and later population exchange suffered by the Greek population of Asia Minor, many ethnic Greeks fled to Athens. They settled in poor neighbourhoods and brought with them Rebetiko music, making it also popular in Greece, and which later became the base for the Laïko music. Other forms of song popular today in Greece are elafrolaika, entechno, dimotika, and skyladika. Greece's most notable, and internationally famous, composers of Greek song, mainly of the entechno form, are Manos Hadjidakis and Mikis Theodorakis. Both composers have achieved fame abroad for their composition of film scores. The renowned American-born Greek soprano Maria Callas spent her teenage years in Athens, where she settled in 1937. Her professional opera career started in 1940 in Athens, with the Greek National Opera. In 2018, the city's municipal Olympia Theatre was renamed to "Olympia City Music Theatre 'Maria Callas'" and in 2023, the Municipality inaugurated the Maria Callas Museum, housing it in a neoclassical building on 44 Mitropoleos street. Sports Athens has a long tradition in sports and sporting events, serving as home to the most important clubs in Greek sport and housing a large number of sports facilities. The city has also been host to sports events of international importance. Athens has hosted the Summer Olympic Games twice, in 1896 and 2004. The 2004 Summer Olympics required the development of the Athens Olympic Stadium, which has since gained a reputation as one of the most beautiful stadiums in the world, and one of its most interesting modern monuments. The biggest stadium in the country, it hosted two finals of the UEFA Champions League, in 1994 and 2007. Athens' other major stadiums are the Karaiskakis Stadium located in Piraeus, a sports and entertainment complex, host of the 1971 UEFA Cup Winners' Cup Final, and Agia Sophia Stadium located in Nea Filadelfeia. Athens has hosted the EuroLeague final three times, the first in 1985 and second in 1993, both at the Peace and Friendship Stadium, most known as SEF, a large indoor arena, and the third time in 2007 at the Olympic Indoor Hall. Events in other sports such as athletics, volleyball, water polo etc., have been hosted in the capital's venues. Athens is home to three European multi-sport clubs: Panathinaikos, originated in Athens city centre, Olympiacos, originated in the suburb of Piraeus and AEK Athens, originated in the suburb of Nea Filadelfeia. In football, Panathinaikos made it to the 1971 European Cup Final, Olympiacos have dominated domestic competitions, while AEK Athens is the other member of the big three. These clubs also have basketball teams; Panathinaikos and Olympiacos are among the top powers in European basketball, having won the Euroleague six times and three respectively, whilst AEK Athens was the first Greek team to win a European trophy in any team sport. Other notable clubs within Athens are Athinaikos, Panionios, Atromitos, Apollon, Panellinios, Egaleo F.C., Ethnikos Piraeus, Maroussi BC and Peristeri B.C. Athenian clubs have also had domestic and international success in other sports. The Athens area encompasses a variety of terrain, notably hills and mountains rising around the city, and the capital is the only major city in Europe to be bisected by a mountain range. Four mountain ranges extend into city boundaries and thousands of kilometres of trails criss-cross the city and neighbouring areas, providing exercise and wilderness access on foot and bike. Beyond Athens and across the prefecture of Attica, outdoor activities include skiing, rock climbing, hang gliding and windsurfing. Numerous outdoor clubs serve these sports, including the Athens Chapter of the Sierra Club, which leads over 4,000 outings annually in the area. Athens was awarded the 2004 Summer Olympics on 5 September 1997 in Lausanne, Switzerland, after having lost a previous bid to host the 1996 Summer Olympics, to Atlanta, United States. It was to be the second time Athens would host the games, following the inaugural event of 1896. After an unsuccessful bid in 1990, the 1997 bid was radically improved, including an appeal to Greece's Olympic history. In the last round of voting, Athens defeated Rome with 66 votes to 41. Prior to this round, the cities of Buenos Aires, Stockholm and Cape Town had been eliminated from competition, having received fewer votes. Although the heavy cost was criticized, estimated at $1.5 billion, Athens was transformed into a more functional city that enjoys modern technology both in transportation and in modern urban development. The games welcomed over 10,000 athletes from all 202 countries. See also Outline of Athens Timeline of Athens References External links of the Municipality of Athens Ancient Greek archaeological sites in Greece Archaeological sites in Attica Capitals in Europe Capitals of Greek states City-states Greek regional capitals Populated coastal places in Greece Populated places established in the 5th century BC Populated places in ancient Greece Populated places in Central Athens (regional unit) Roman sites in Greece Athens Riviera	12
Anguilla ( ) is a British Overseas Territory in the Caribbean. It is one of the most northerly of the Leeward Islands in the Lesser Antilles, lying east of Puerto Rico and the Virgin Islands and directly north of Saint Martin. The territory consists of the main island of Anguilla, approximately long by wide at its widest point, together with a number of much smaller islands and cays with no permanent population. The territory's capital is The Valley. The total land area of the territory is , with a population of approximately (). Etymology The native Arawak name for the island was Malliouhana. In reference to the island's shape, the Italian , meaning "eel" (in turn, from the Latin diminutive of anguis, "snake") was used as its name. Christopher Columbus is held in Anguillan tradition to have named the island. History Anguilla was first settled by Indigenous Amerindian peoples who migrated from South America. The earliest Native American artefacts found on Anguilla have been dated to around 1300 BC; remains of settlements date from AD 600. There are two known petroglyph sites in Anguilla: Big Spring and Fountain Cavern. The rock ledges of Big Spring contain over 100 petroglyphs (dating back to AD 600–1200), the majority consisting of three indentations that form faces. Precisely when Anguilla was first seen by Europeans is uncertain: some sources claim that Columbus sighted the island during his second voyage in 1493, while others state that the first European explorer was the French Huguenot nobleman and merchant René Goulaine de Laudonnière in 1564. The Dutch West India Company established a fort on the island in 1631. However, the Company later withdrew after its fort was destroyed by the Spanish in 1633. Traditional accounts state that Anguilla was first colonised by English settlers from Saint Kitts beginning in 1650. The settlers focused on planting tobacco, and to a lesser extent cotton. The French temporarily took over the island in 1666 but returned it to English control under the terms of the Treaty of Breda the next year. Major John Scott who visited in September 1667, wrote of leaving the island "in good condition" and noted that in July 1668, "200 or 300 people fled thither in time of war". The French attacked again in 1688, 1745 and 1798, causing much destruction but failing to capture the island. The Indigenous Amerindian population was almost entirely gone within decades of European contact, with disease and enslavement as contributing factors. It is likely that the early European settlers brought enslaved Africans with them. Historians confirm that African slaves lived in the region in the early 17th century, such as slaves from Senegal living on St Kitts in the mid-1600s. By 1672 a slave depot existed on the island of Nevis, serving the Leeward Islands. While the time of African arrival in Anguilla is difficult to place precisely, archival evidence indicates a substantial African presence of at least 100 enslaved people by 1683; these seem to have come from Central Africa as well as West Africa. The slaves were forced to work on the sugar plantations which had begun to replace tobacco as Anguilla's main crop. Over time the African slaves and their descendants came to vastly outnumber the white settlers. The African slave trade was eventually terminated within the British Empire in 1807, and slavery was outlawed completely in 1834. Many planters subsequently sold up or left the island. During the early colonial period, Anguilla was administered by the British through Antigua; in 1825, it was placed under the administrative control of nearby Saint Kitts. Anguilla was federated with St Kitts and Nevis in 1882, against the wishes of many Anguillans. Economic stagnation, and the severe effects of several droughts in the 1890s and later the Great Depression of the 1930s led many Anguillans to emigrate for better prospects elsewhere. Full adult suffrage was introduced to Anguilla in 1952. After a brief period as part of the West Indies Federation (1958–1962), the island of Anguilla became part of the associated state of Saint Kitts-Nevis-Anguilla with full internal autonomy in 1967. However many Anguillans had no wish to be a part of this union, and resented the dominance of St Kitts within it. On 30 May 1967 Anguillans forcibly ejected the St Kitts police force from the island and declared their separation from St Kitts following a referendum. The events, led by Atlin Harrigan and Ronald Webster among others, became known as the Anguillan Revolution; its goal was not independence per se, but rather independence from Saint Kitts and Nevis and a return to being a British colony. With negotiations failing to break the deadlock, a second referendum confirming Anguillans' desire for separation from St Kitts was held and the Republic of Anguilla was declared unilaterally, with Ronald Webster as president. Efforts by British envoy William Whitlock failed to break the impasse and 300 British troops were subsequently sent in March 1969. British authority was restored, and confirmed by the Anguilla Act of July 1971. In 1980, Anguilla was finally allowed to formally secede from Saint Kitts and Nevis and become a separate British Crown colony (now a British overseas territory). Since then, Anguilla has been politically stable, and has seen a large growth in its tourism and offshore financing sectors. Geography and geology Anguilla is a flat, low-lying island of coral and limestone in the Caribbean Sea, measuring some 16 miles (26 km) long and 3.5 miles (6 km) in width. It lies to the east of Puerto Rico and the Virgin Islands and directly north of Saint Martin, separated from that island by the Anguilla Channel. The soil is generally thin and poor, supporting scrub, tropical and forest vegetation. The terrain is generally low-lying, with the highest terrain located in the vicinity of The Valley; Crocus Hill, Anguilla's highest peak at , lies in the western regions of the town. Anguilla is noted for its ecologically important coral reefs and beaches. Apart from the main island of Anguilla itself, the territory includes a number of other smaller islands and cays, mostly tiny and uninhabited: Anguillita Blowing Rock Dog Island Little Scrub Island Prickly Pear Cays Scrub Island Seal Island Sombrero, also known as Hat Island Sandy Island Scilly Cay Geology Anguilla (and the wider Anguilla Bank) is of volcanic origin, lying on the Lesser Antilles volcanic island arc, and tuffs and volcaniclastic breccias of Eocene age are exposed locally on the island. The island was largely submerged during the Miocene, leading to the formation of the reefal limestone Anguilla Formation, which was subsequently tectonically uplifted and covers most of the island today. Since the late Pleistocene, however, Anguilla has undergone tectonic subsidence at a rate of around 1-2mm/yr. Climate Temperature Northeastern trade winds keep this tropical island relatively cool and dry. Average annual temperature is . July–October is its hottest period, December–February, its coolest. Rainfall Rainfall averages annually, although the figures vary from season to season and year to year. The island is subject to both sudden tropical storms and hurricanes, which occur in the period from July to November. The island suffered damage in 1995 from Hurricane Luis and severe flooding from Hurricane Lenny in 1999. Governance Political system Anguilla is an internally self-governing overseas territory of the United Kingdom. Its politics take place in a framework of a parliamentary representative democratic dependency, whereby the Premier is the head of government, and of a pluriform multi-party system. A governor is appointed by the British government to represent the king. The United Nations Committee on Decolonization includes Anguilla on the United Nations list of non-self-governing territories. The territory's constitution is the Anguilla Constitutional Order 1 April 1982 (amended 1990). Executive power is exercised by the government, with legislative power being vested in both the government and the House of Assembly. The judiciary is independent of the executive and the legislature. Defence As a British overseas territory, the UK is responsible for Anguilla's military defence, although there are no active garrisons or armed forces present in the territory. Since 2020, the Royal Navy has forward-deployed the offshore patrol vessel HMS Medway long-term to the Caribbean for patrol and sovereignty protection duties. In October 2023, the destroyer HMS Dauntless (which had temporarily replaced Medway on her normal Caribbean tasking), visited the territory in order to assist local authorities in preparing for the climax of the hurricane season. Anguilla had a small marine police force, comprising around 32 personnel, which operated one VT Halmatic M160-class 52-foot fast patrol boat. Policing on the island is the responsibility of the Royal Anguilla Police Force. Population Demographics The majority of residents (90.08%) are black, most of whom are the descendants of enslaved people transported from Africa. Minorities include whites at 3.74% and people of mixed race at 4.65% (figures from 2001 census). 72% of the population is Anguillan while 28% is non-Anguillan (2001 census). Of the non-Anguillan population, many are citizens of the United States, United Kingdom, St Kitts & Nevis, the Dominican Republic, Jamaica and Nigeria. 2006 and 2007 saw an influx of large numbers of Chinese, Indian and Mexican workers, brought in as labour for major tourist developments due to the local population not being large enough to support the labour requirements. Religion Christian churches did not have a consistent or strong presence during the initial period of English colonisation; spiritual and religious practices of Europeans and Africans tended to reflect their regional origins. As early as 1813, Christian ministers formally ministered to enslaved Africans and promoted literacy among converts. The Wesleyan (Methodist) Missionary Society of England built churches and schools from 1817. According to the 2001 census, Christianity is Anguilla's predominant religion, with 29% of the population practising Anglicanism; another 23.9% are Methodist. Other churches on the island include Seventh-day Adventist, Baptist, Roman Catholic (served by the Diocese of Saint John's–Basseterre, with the See at Saint John on Antigua and Barbuda) and a small community of Jehovah's Witnesses (0.7%). Between 1992 and 2001, the number of followers of the Church of God and Pentecostals increased considerably. There are at least 15 churches on the island. Although a minority on the island, Anguilla is an important location to followers of Rastafarian religion as the birthplace of Robert Athlyi Rogers, author of the Holy Piby which had a strong influence on Rastafarian and other Africa-centre belief systems. More recently, a Muslim cultural centre has opened on the island. Languages Today most people in Anguilla speak a British-influenced variety of standard English. Other languages are also spoken on the island, including varieties of Spanish, Chinese and the languages of other immigrant communities. However, the most common language other than Standard English is the island's own English-lexifier Creole language (not to be confused with Antillean Creole ('French Creole'), spoken in French islands such as Martinique and Guadeloupe). It is referred to locally by terms such as "dialect" (pronounced "dialek"), Anguilla Talk or "Anguillian". It has its main roots in early varieties of English and West African languages, and is similar to the dialects spoken in English-speaking islands throughout the Eastern Caribbean in terms of its structural features. Linguists who are interested in the origins of Anguillan and other Caribbean Creoles point out that some of its grammatical features can be traced to African languages while others can be traced to European languages. Three areas have been identified as significant for the identification of the linguistic origins of those forced migrants who arrived before 1710: the Gold Coast, the Slave Coast and the Windward Coast. Sociohistorical information from Anguilla's archives suggest that Africans and Europeans formed two distinct, but perhaps overlapping speech communities in the early phases of the island's colonisation. "Anguillian" is believed to have emerged as the language of the masses as time passed, slavery was abolished and locals began to see themselves as "belonging" to Anguillan society. Education There are six government primary schools, one government secondary school (Albena Lake Hodge Comprehensive School), and two private schools. There is a single library, the Edison L. Hughes Education & Library Complex of the Anguilla Public Library. A branch of the Saint James School of Medicine was established in 2011 in Anguilla. It is a private, for-profit medical school headquartered in Park Ridge, Illinois. There is a University of the West Indies Open campus site in the island. Culture The island's cultural history begins with the native Taino, Arawak and Carib. Their artifacts have been found around the island, telling of life before European settlers arrived. Anguillan culture has also been built through immigration. Many European families have moved to the island and have impacted the formalities of the Anguillan people. Restaurants such as Dolce Vita and Roy's Bayside Grill, located in Meads Bay, represent the European culture assimilating within the island. Similar to nearby islands, Anguillans geography and location require a cultural reliance on the ocean. The island's abundance of sea life has led to the incorporation of many fish and crustacean into daily life. They have become a part of the local cuisine, opened up opportunities for ecotourism, and introduced celebrations such as Lobster Fest and boat races. As throughout the Caribbean, holidays are a cultural fixture. Anguilla's most important holidays are of historic as much as cultural importance – particularly the anniversary of the emancipation (previously August Monday in the Park), celebrated as the Summer Festival, or Carnival, the sailboat races, and Lobster Fest. British festivities, such as the King's Birthday, are also celebrated. Music in Anguilla presents itself as an important part of its culture as well. All different genres of music are played at the celebrations mentioned above. This music represents the deep history of talent that Anguillans have displayed for decades. The Anguilla National Trust (ANT) was established in 1989 and opened its current office in 1991 charged with the responsibility of preserving the heritage of the island, including its cultural heritage. Cuisine Anguillan cuisine is influenced by native Caribbean, West African, Spanish, French, and English cuisines. Seafood is abundant, including prawns, shrimp, crab, spiny lobster, conch, mahi-mahi, red snapper, marlin, and grouper. Salt cod is a staple food eaten on its own and used in stews, casseroles and soups. Livestock is limited due to the small size of the island and people there use poultry, pork, goat, and mutton, along with imported beef. Goat is the most commonly eaten meat, used in a variety of dishes. The official national food of Anguilla is pigeon peas and rice. A significant amount of the island's produce is imported due to limited land suitable for agriculture production; much of the soil is sandy and infertile. The agriculture produce of Anguilla includes tomatoes, peppers, limes and other citrus fruits, onion, garlic, squash, pigeon peas, and callaloo. Starch staple foods include imported rice and other foods that are imported or locally grown, including yams, sweet potatoes and breadfruit. Literature The Anguilla National Trust has programmes encouraging Anguillan writers and the preservation of the island's history. In 2015, Where I See The Sun – Contemporary Poetry in Anguilla A New Anthology by Lasana M. Sekou was published by House of Nehesi Publishers. Among the forty three poets in the collection are Rita Celestine-Carty, Bankie Banx, John T. Harrigan, Patricia J. Adams, Fabian Fahie, Dr. Oluwakemi Linda Banks, and Reuel Ben Lewi. Music Various Caribbean musical genres are popular on the island, such as soca and calypso, but reggae most deeply roots itself in Anguillan society. Anguilla has produced many artists and groups in this genre. Reggae has shown itself to be the most popular genre in Anguilla. The most successful of reggae artists originating in Anguilla come from the Banks family. Bankie "Banx" and his son Omari Banks have had many chart-topping songs listened to around the world. The two musicians continue to provide live performances across the island quite often. British Dependency has also gained popularity throughout the 21st century. The band, who began in Anguilla, boasts the island's first female bass player. Performing alongside The Wailers on tour, British Dependency have earned attention from an American audience. One of many musical events that take place in Anguilla is Moonsplash. Moonsplash is an annual reggae music festival that has occurred in Anguilla for 33 consecutive years and proves to be the oldest independent musical event in the Caribbean. Along with its longstanding history, it is the largest festival annually alongside carnival. While not many soca and calypso artists have gained extreme popularity, the genres are still widely listened to across the island. Sports Boat racing has deep roots in Anguillan culture and is the national sport. There are regular sailing regattas on national holidays, such as Carnival, which are contested by locally built and designed boats. These boats have names and have sponsors that print their logo on their sails. As in many other former British colonies, cricket is also a popular sport. Anguilla is the home of Omari Banks, who played for the West Indies Cricket Team, while Cardigan Connor played first-class cricket for English county side Hampshire and was 'chef de mission' (team manager) for Anguilla's Commonwealth Games team in 2002. Other noted players include Chesney Hughes, who played for Derbyshire County Cricket Club in England. Rugby union is represented in Anguilla by the Anguilla Eels RFC, who were formed in April 2006. The Eels have been finalists in the St. Martin tournament in November 2006 and semi-finalists in 2007, 2008, 2009 and Champions in 2010. The Eels were formed in 2006 by Scottish club national second row Martin Welsh, Club Sponsor and President of the AERFC Ms. Jacquie Ruan, and Canadian standout Scrumhalf Mark Harris (Toronto Scottish RFC). Anguilla is the birthplace of sprinter Zharnel Hughes who has represented Great Britain since 2015, and England at the 2018 Commonwealth Games. He won the 100 metres at the 2018 European Athletics Championships, the 4 x 100 metres at the same championships, and the 4 x 100 metres for England at the 2018 Commonwealth Games. He also won a relay team gold at the 2022 Birmingham Commonwealth Games and a silver on the relay for Great Britain at the 2020 Olympic Games. In 2023 he broke the British record for the 100m sprint, with a time of 9.83 seconds. Shara Proctor, British Long Jump Silver Medalist at the World Championships in Beijing, first represented Anguilla in the event until 2010 when she began to represent Great Britain and England. Under the Anguillan Flag she achieved several medals in the NACAC games. Keith Connor, triple jumper, is also an Anguillan. He represented Great Britain and England and achieved several international titles including Commonwealth and European Games gold medals and an Olympic bronze medal. Keith later became Head Coach of Australia Athletics. Natural history Wildlife Anguilla has habitat for the Cuban tree frogs (Osteopilus septentrionalis). The red-footed tortoise (Chelonoidis carbonaria) is a species of tortoise found here, which originally came from South America. Hurricanes in the mid-90s led to over-water dispersal of the green iguanas (Iguana iguana) to Anguilla. All three animals are introductions. Five species of bats are known in the literature from Anguilla – the threatened insular single leaf bat (Monophyllus plethodon), the Antillean fruit-eating bat (Brachyphylla cavernarum), the Jamaican fruit bat (Artibeus jamaicensis), the Mexican funnel-eared bat (Natalus stramineus), and the velvety free-tailed bat (Molossus molossus). Notable people Zharnel Hughes (born 1995), sprinter Dee-Ann Kentish-Rogers (born 1993), politician, model and Miss Universe Great Britain 2018 Carlos Newton (born 1976), former UFC Welterweight Champion Shara Proctor (born 1988), long jump athlete Economy Anguilla's thin arid soil being largely unsuitable for agriculture, the island has few land-based natural resources. Its main industries are tourism, offshore incorporation and management, offshore banking, captive insurance and fishing. Anguilla's currency is the East Caribbean dollar, though the US dollar is also widely accepted. The exchange rate is fixed to the US dollar at US$1 = EC$2.70. The economy, and especially the tourism sector, suffered a setback in late 1995 due to the effects of Hurricane Luis in September. Hotels were hit particularly hard but a recovery occurred the following year. Another economic setback occurred during the aftermath of Hurricane Lenny in 2000. Before the 2008 worldwide crisis, the economy of Anguilla was growing strongly, especially the tourism sector, which was driving major new developments in partnerships with multi-national companies. Anguilla's tourism industry received a major boost when it was selected to host the World Travel Awards in December 2014. Known as "the Oscars of the travel industry", the awards ceremony was held at the CuisinArt Resort and Spa and was hosted by Vivica A. Fox. Anguilla was voted the World's Leading Luxury Island Destination from a short list of top-tier candidates such as St. Barts, the Maldives, and Mauritius. Anguilla's financial system comprises seven banks, two money services businesses, more than 40 company managers, more than 50 insurers, 12 brokers, more than 250 captive intermediaries, more than 50 mutual funds, and eight trust companies. Anguilla has become a popular tax haven, having no capital gains, estate, profit, sales, or corporate taxes. In April 2011, faced with a mounting deficit, it introduced a 3% "Interim Stabilisation Levy", Anguilla's first form of income tax. Anguilla also has a 0.75% property tax. Anguilla aims to obtain 15% of its energy from solar power to become less reliant on expensive imported diesel. The Climate & Development Knowledge Network is helping the government gather the information it needs to change the territory's legislation, so that it can integrate renewables into its grid. Barbados has also made good progress in switching to renewables, but many other Small Island Developing States are still at the early stages of planning how to integrate renewable energy into their grids. "For a small island we're very far ahead," said Beth Barry, Coordinator of the Anguilla Renewable Energy Office. "We've got an Energy Policy and a draft Climate Change policy and have been focusing efforts on the question of sustainable energy supply for several years now. As a result, we have a lot of information we can share with other islands." According to a Bloomberg report, due to a skyrocketing interest in artificial intelligence, Anguilla was expected to profit in 2023 from a surge in demand for web addresses ending with the country's top-level domain .ai. The total number of registrations of .ai domain names had already doubled in 2022, and according to Vince Cate, who has managed the top-level domain, Anguilla will bring in as much as $30 million in domain-registration fees for 2023. Transportation Air Anguilla is served by Clayton J. Lloyd International Airport (prior to 4 July 2010 known as Wallblake Airport). The primary runway at the airport is in length and can accommodate moderate-sized aircraft. Regional scheduled passenger services connect to various other Caribbean islands via local airlines. In December 2021 Anguilla inaugurated its first ever international regular commercial jet service flight to and from the mainland U.S. American Eagle operating on behalf of American Airlines began nonstop Embraer 175 regional jet service to Anguilla from Miami in an aviation watershed moment for Anguilla with the airport also currently attempting to attract other international air carriers. Other airlines currently serving the airport include Tradewind Aviation and Cape Air which provide scheduled air service to San Juan, Puerto Rico. Several other small airlines serve the airport as well. The airport can handle large narrow-body jets such as the Boeing 737 and Airbus A320 and has growing private jet service flights with a new private jet terminal being built. Road Aside from taxis, there is no public transport on the island. Cars drive on the left. Boat There are regular ferries from Saint Martin to Anguilla. It is a 20-minute crossing from Marigot, St. Martin to Blowing Point, Anguilla. Ferries commence service from 7:00 am. There is also a charter service, from Blowing Point, Anguilla to Princess Juliana Airport to make travel easier. This way of travel is the most common method of transport between Anguilla and St. Martin. See also Bibliography of Anguilla Outline of Anguilla Index of Anguilla-related articles References Further reading . . Harris, David R. - Plants, Animals and Man in the Outer Leeward Islands, West Indies. An Ecological Study of Antigua, Barbuda, and Anguilla. External links Government Government of Anguilla—Official government website General information Anguilla. The World Factbook. Central Intelligence Agency. Anguilla from UCB Libraries GovPubs battle for freedom -- youtube video compilation archived at Ghostarchive.org on 18 May 2022 Dependent territories in the Caribbean .Anguilla Leeward Islands (Caribbean) English-speaking countries and territories Island countries Former English colonies British Leeward Islands British West Indies Member states of the Organisation of Eastern Caribbean States States and territories established in 1980 Small Island Developing States 1650 establishments in the British Empire 1650 establishments in North America 1650s establishments in the Caribbean States and territories established in 1650	5
Ada is a structured, statically typed, imperative, and object-oriented high-level programming language, inspired by Pascal and other languages. It has built-in language support for design by contract (DbC), extremely strong typing, explicit concurrency, tasks, synchronous message passing, protected objects, and non-determinism. Ada improves code safety and maintainability by using the compiler to find errors in favor of runtime errors. Ada is an international technical standard, jointly defined by the International Organization for Standardization (ISO), and the International Electrotechnical Commission (IEC). , the standard, called Ada 2012 informally, is ISO/IEC 8652:2012. Ada was originally designed by a team led by French computer scientist Jean Ichbiah of Honeywell under contract to the United States Department of Defense (DoD) from 1977 to 1983 to supersede over 450 programming languages used by the DoD at that time. Ada was named after Ada Lovelace (1815–1852), who has been credited as the first computer programmer. Features Ada was originally designed for embedded and real-time systems. The Ada 95 revision, designed by S. Tucker Taft of Intermetrics between 1992 and 1995, improved support for systems, numerical, financial, and object-oriented programming (OOP). Features of Ada include: strong typing, modular programming mechanisms (packages), run-time checking, parallel processing (tasks, synchronous message passing, protected objects, and nondeterministic select statements), exception handling, and generics. Ada 95 added support for object-oriented programming, including dynamic dispatch. The syntax of Ada minimizes choices of ways to perform basic operations, and prefers English keywords (such as "or else" and "and then") to symbols (such as "\|\|" and "&&"). Ada uses the basic arithmetical operators "+", "-", "*", and "/", but avoids using other symbols. Code blocks are delimited by words such as "declare", "begin", and "end", where the "end" (in most cases) is followed by the identifier of the block it closes (e.g., if ... end if, loop ... end loop). In the case of conditional blocks this avoids a dangling else that could pair with the wrong nested if-expression in other languages like C or Java. Ada is designed for developing very large software systems. Ada packages can be compiled separately. Ada package specifications (the package interface) can also be compiled separately without the implementation to check for consistency. This makes it possible to detect problems early during the design phase, before implementation starts. A large number of compile-time checks are supported to help avoid bugs that would not be detectable until run-time in some other languages or would require explicit checks to be added to the source code. For example, the syntax requires explicitly named closing of blocks to prevent errors due to mismatched end tokens. The adherence to strong typing allows detecting many common software errors (wrong parameters, range violations, invalid references, mismatched types, etc.) either during compile-time, or otherwise during run-time. As concurrency is part of the language specification, the compiler can in some cases detect potential deadlocks. Compilers also commonly check for misspelled identifiers, visibility of packages, redundant declarations, etc. and can provide warnings and useful suggestions on how to fix the error. Ada also supports run-time checks to protect against access to unallocated memory, buffer overflow errors, range violations, off-by-one errors, array access errors, and other detectable bugs. These checks can be disabled in the interest of runtime efficiency, but can often be compiled efficiently. It also includes facilities to help program verification. For these reasons, Ada is widely used in critical systems, where any anomaly might lead to very serious consequences, e.g., accidental death, injury or severe financial loss. Examples of systems where Ada is used include avionics, air traffic control, railways, banking, military and space technology. Ada's dynamic memory management is high-level and type-safe. Ada has no generic or untyped pointers; nor does it implicitly declare any pointer type. Instead, all dynamic memory allocation and deallocation must occur via explicitly declared access types. Each access type has an associated storage pool that handles the low-level details of memory management; the programmer can either use the default storage pool or define new ones (this is particularly relevant for Non-Uniform Memory Access). It is even possible to declare several different access types that all designate the same type but use different storage pools. Also, the language provides for accessibility checks, both at compile time and at run time, that ensures that an access value cannot outlive the type of the object it points to. Though the semantics of the language allow automatic garbage collection of inaccessible objects, most implementations do not support it by default, as it would cause unpredictable behaviour in real-time systems. Ada does support a limited form of region-based memory management; also, creative use of storage pools can provide for a limited form of automatic garbage collection, since destroying a storage pool also destroys all the objects in the pool. A double-dash ("--"), resembling an em dash, denotes comment text. Comments stop at end of line, to prevent unclosed comments from accidentally voiding whole sections of source code. Disabling a whole block of code now requires the prefixing of each line (or column) individually with "--". While clearly denoting disabled code with a column of repeated "--" down the page, this renders the experimental dis/re-enablement of large blocks a more drawn out process. The semicolon (";") is a statement terminator, and the null or no-operation statement is null;. A single ; without a statement to terminate is not allowed. Unlike most ISO standards, the Ada language definition (known as the Ada Reference Manual or ARM, or sometimes the Language Reference Manual or LRM) is free content. Thus, it is a common reference for Ada programmers, not only programmers implementing Ada compilers. Apart from the reference manual, there is also an extensive rationale document which explains the language design and the use of various language constructs. This document is also widely used by programmers. When the language was revised, a new rationale document was written. One notable free software tool that is used by many Ada programmers to aid them in writing Ada source code is the GNAT Programming Studio, and GNAT which is part of the GNU Compiler Collection. History In the 1970s the US Department of Defense (DoD) became concerned by the number of different programming languages being used for its embedded computer system projects, many of which were obsolete or hardware-dependent, and none of which supported safe modular programming. In 1975, a working group, the High Order Language Working Group (HOLWG), was formed with the intent to reduce this number by finding or creating a programming language generally suitable for the department's and the UK Ministry of Defence's requirements. After many iterations beginning with an original straw-man proposal the eventual programming language was named Ada. The total number of high-level programming languages in use for such projects fell from over 450 in 1983 to 37 by 1996. HOLWG crafted the Steelman language requirements, a series of documents stating the requirements they felt a programming language should satisfy. Many existing languages were formally reviewed, but the team concluded in 1977 that no existing language met the specifications. Requests for proposals for a new programming language were issued and four contractors were hired to develop their proposals under the names of Red (Intermetrics led by Benjamin Brosgol), Green (Honeywell, led by Jean Ichbiah), Blue (SofTech, led by John Goodenough) and Yellow (SRI International, led by Jay Spitzen). In April 1978, after public scrutiny, the Red and Green proposals passed to the next phase. In May 1979, the Green proposal, designed by Jean Ichbiah at Honeywell, was chosen and given the name Ada—after Augusta Ada, Countess of Lovelace. This proposal was influenced by the language LIS that Ichbiah and his group had developed in the 1970s. The preliminary Ada reference manual was published in ACM SIGPLAN Notices in June 1979. The Military Standard reference manual was approved on December 10, 1980 (Ada Lovelace's birthday), and given the number MIL-STD-1815 in honor of Ada Lovelace's birth year. In 1981, C. A. R. Hoare took advantage of his Turing Award speech to criticize Ada for being overly complex and hence unreliable, but subsequently seemed to recant in the foreword he wrote for an Ada textbook. Ada attracted much attention from the programming community as a whole during its early days. Its backers and others predicted that it might become a dominant language for general purpose programming and not only defense-related work. Ichbiah publicly stated that within ten years, only two programming languages would remain: Ada and Lisp. Early Ada compilers struggled to implement the large, complex language, and both compile-time and run-time performance tended to be slow and tools primitive. Compiler vendors expended most of their efforts in passing the massive, language-conformance-testing, government-required Ada Compiler Validation Capability (ACVC) validation suite that was required in another novel feature of the Ada language effort. The Jargon File, a dictionary of computer hacker slang originating in 1975–1983, notes in an entry on Ada that "it is precisely what one might expect given that kind of endorsement by fiat; designed by committee...difficult to use, and overall a disastrous, multi-billion-dollar boondoggle...Ada Lovelace...would almost certainly blanch at the use her name has been latterly put to; the kindest thing that has been said about it is that there is probably a good small language screaming to get out from inside its vast, elephantine bulk." The first validated Ada implementation was the NYU Ada/Ed translator, certified on April 11, 1983. NYU Ada/Ed is implemented in the high-level set language SETL. Several commercial companies began offering Ada compilers and associated development tools, including Alsys, TeleSoft, DDC-I, Advanced Computer Techniques, Tartan Laboratories, Irvine Compiler, TLD Systems, and Verdix. Computer manufacturers who had a significant business in the defense, aerospace, or related industries, also offered Ada compilers and tools on their platforms; these included Concurrent Computer Corporation, Cray Research, Inc., Digital Equipment Corporation, Harris Computer Systems, and Siemens Nixdorf Informationssysteme AG. In 1991, the US Department of Defense began to require the use of Ada (the Ada mandate) for all software, though exceptions to this rule were often granted. The Department of Defense Ada mandate was effectively removed in 1997, as the DoD began to embrace commercial off-the-shelf (COTS) technology. Similar requirements existed in other NATO countries: Ada was required for NATO systems involving command and control and other functions, and Ada was the mandated or preferred language for defense-related applications in countries such as Sweden, Germany, and Canada. By the late 1980s and early 1990s, Ada compilers had improved in performance, but there were still barriers to fully exploiting Ada's abilities, including a tasking model that was different from what most real-time programmers were used to. Because of Ada's safety-critical support features, it is now used not only for military applications, but also in commercial projects where a software bug can have severe consequences, e.g., avionics and air traffic control, commercial rockets such as the Ariane 4 and 5, satellites and other space systems, railway transport and banking. For example, the Primary Flight Control System, the fly-by-wire system software in the Boeing 777, was written in Ada, as were the fly-by-wire systems for the aerodynamically unstable Eurofighter, Gripen, F-22 Raptor and the DFCS replacement flight control system for the F-14 Tomcat. The Canadian Automated Air Traffic System was written in 1 million lines of Ada (SLOC count). It featured advanced distributed processing, a distributed Ada database, and object-oriented design. Ada is also used in other air traffic systems, e.g., the UK's next-generation Interim Future Area Control Tools Support () air traffic control system is designed and implemented using SPARK Ada. It is also used in the French TVM in-cab signalling system on the TGV high-speed rail system, and the metro suburban trains in Paris, London, Hong Kong and New York City. Standardization Preliminary Ada can be found in ACM Sigplan Notices Vol 14, No 6, June 1979. Ada was first published in 1980 as an ANSI standard ANSI/MIL-STD 1815. As this very first version held many errors and inconsistencies (see Summary of Ada Language Changes), the revised edition was published in 1983 as ANSI/MIL-STD 1815A. Without any further changes, it became an ISO standard in 1987, ISO 8652:1987. This version of the language is commonly known as Ada 83, from the date of its adoption by ANSI, but is sometimes referred to also as Ada 87, from the date of its adoption by ISO. This is the Ada 83 Reference Manual. There is also a French translation; DIN translated it into German as DIN 66268 in 1988. Ada 95, the joint ISO/IEC/ANSI standard ISO/IEC 8652:1995 (see Ada 95 RM) was published in February 1995, making it the first ISO standard object-oriented programming language. To help with the standard revision and future acceptance, the US Air Force funded the development of the GNAT Compiler. Presently, the GNAT Compiler is part of the GNU Compiler Collection. Work has continued on improving and updating the technical content of the Ada language. A Technical Corrigendum to Ada 95 was published in October 2001, ISO/IEC 8652:1995/Corr 1:2001 (see Ada 95 RM with TC 1), and a major Amendment, ISO/IEC 8652:1995/Amd 1:2007 (see Ada 2005 RM) was published on March 9, 2007, commonly known as Ada 2005 because work on the new standard was finished that year. At the Ada-Europe 2012 conference in Stockholm, the Ada Resource Association (ARA) and Ada-Europe announced the completion of the design of the latest version of the Ada language and the submission of the reference manual to the ISO/IEC JTC 1/SC 22/WG 9 of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) for approval. ISO/IEC 8652:2012 (see Ada 2012 RM) was published in December 2012, known as Ada 2012. A technical corrigendum was published ISO/IEC 8652:2012/COR 1:2016 (see RM 2012 with TC 1). Despite the names Ada 83, 95 etc., legally there is only one Ada standard, the one of the last ISO/IEC standard: with the acceptance of a new standard version, the previous one becomes withdrawn. The other names are just informal ones referencing a certain edition. Other related standards include ISO/IEC 8651-3:1988 Information processing systems—Computer graphics—Graphical Kernel System (GKS) language bindings—Part 3: Ada. Language constructs Ada is an ALGOL-like programming language featuring control structures with reserved words such as if, then, else, while, for, and so on. However, Ada also has many data structuring facilities and other abstractions which were not included in the original ALGOL 60, such as type definitions, records, pointers, enumerations. Such constructs were in part inherited from or inspired by Pascal. "Hello, world!" in Ada A common example of a language's syntax is the Hello world program: (hello.adb) with Ada.Text_IO; procedure Hello is begin Ada.Text_IO.Put_Line ("Hello, world!"); end Hello; This program can be compiled by using the freely available open source compiler GNAT, by executing gnatmake hello.adb Data types Ada's type system is not based on a set of predefined primitive types but allows users to declare their own types. This declaration in turn is not based on the internal representation of the type but on describing the goal which should be achieved. This allows the compiler to determine a suitable memory size for the type, and to check for violations of the type definition at compile time and run time (i.e., range violations, buffer overruns, type consistency, etc.). Ada supports numerical types defined by a range, modulo types, aggregate types (records and arrays), and enumeration types. Access types define a reference to an instance of a specified type; untyped pointers are not permitted. Special types provided by the language are task types and protected types. For example, a date might be represented as: type Day_type is range 1 .. 31; type Month_type is range 1 .. 12; type Year_type is range 1800 .. 2100; type Hours is mod 24; type Weekday is (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday); type Date is record Day : Day_type; Month : Month_type; Year : Year_type; end record; Important to note: Day_type, Month_type, Year_type, Hours are incompatible types, meaning that for instance the following expression is illegal: Today: Day_type := 4; Current_Month: Month_type := 10; ... Today + Current_Month ... -- illegal The predefined plus-operator can only add values of the same type, so the expression is illegal. Types can be refined by declaring subtypes: subtype Working_Hours is Hours range 0 .. 12; -- at most 12 Hours to work a day subtype Working_Day is Weekday range Monday .. Friday; -- Days to work Work_Load: constant array(Working_Day) of Working_Hours -- implicit type declaration := (Friday => 6, Monday => 4, others => 10); -- lookup table for working hours with initialization Types can have modifiers such as limited, abstract, private etc. Private types do not show their inner structure; objects of limited types cannot be copied. Ada 95 adds further features for object-oriented extension of types. Control structures Ada is a structured programming language, meaning that the flow of control is structured into standard statements. All standard constructs and deep-level early exit are supported, so the use of the also supported "go to" commands is seldom needed. -- while a is not equal to b, loop. while a /= b loop Ada.Text_IO.Put_Line ("Waiting"); end loop; if a > b then Ada.Text_IO.Put_Line ("Condition met"); else Ada.Text_IO.Put_Line ("Condition not met"); end if; for i in 1 .. 10 loop Ada.Text_IO.Put ("Iteration: "); Ada.Text_IO.Put (i); Ada.Text_IO.Put_Line; end loop; loop a := a + 1; exit when a = 10; end loop; case i is when 0 => Ada.Text_IO.Put ("zero"); when 1 => Ada.Text_IO.Put ("one"); when 2 => Ada.Text_IO.Put ("two"); -- case statements have to cover all possible cases: when others => Ada.Text_IO.Put ("none of the above"); end case; for aWeekday in Weekday'Range loop -- loop over an enumeration Put_Line ( Weekday'Image(aWeekday) ); -- output string representation of an enumeration if aWeekday in Working_Day then -- check of a subtype of an enumeration Put_Line ( " to work for " & Working_Hours'Image (Work_Load(aWeekday)) ); -- access into a lookup table end if; end loop; Packages, procedures and functions Among the parts of an Ada program are packages, procedures and functions. Example: Package specification (example.ads) package Example is type Number is range 1 .. 11; procedure Print_and_Increment (j: in out Number); end Example; Package body (example.adb) with Ada.Text_IO; package body Example is i : Number := Number'First; procedure Print_and_Increment (j: in out Number) is function Next (k: in Number) return Number is begin return k + 1; end Next; begin Ada.Text_IO.Put_Line ( "The total is: " & Number'Image(j) ); j := Next (j); end Print_and_Increment; -- package initialization executed when the package is elaborated begin while i < Number'Last loop Print_and_Increment (i); end loop; end Example; This program can be compiled, e.g., by using the freely available open-source compiler GNAT, by executing gnatmake -z example.adb Packages, procedures and functions can nest to any depth, and each can also be the logical outermost block. Each package, procedure or function can have its own declarations of constants, types, variables, and other procedures, functions and packages, which can be declared in any order. Concurrency Ada has language support for task-based concurrency. The fundamental concurrent unit in Ada is a task, which is a built-in limited type. Tasks are specified in two parts – the task declaration defines the task interface (similar to a type declaration), the task body specifies the implementation of the task. Depending on the implementation, Ada tasks are either mapped to operating system threads or processes, or are scheduled internally by the Ada runtime. Tasks can have entries for synchronisation (a form of synchronous message passing). Task entries are declared in the task specification. Each task entry can have one or more accept statements within the task body. If the control flow of the task reaches an accept statement, the task is blocked until the corresponding entry is called by another task (similarly, a calling task is blocked until the called task reaches the corresponding accept statement). Task entries can have parameters similar to procedures, allowing tasks to synchronously exchange data. In conjunction with select statements it is possible to define guards on accept statements (similar to Dijkstra's guarded commands). Ada also offers protected objects for mutual exclusion. Protected objects are a monitor-like construct, but use guards instead of conditional variables for signaling (similar to conditional critical regions). Protected objects combine the data encapsulation and safe mutual exclusion from monitors, and entry guards from conditional critical regions. The main advantage over classical monitors is that conditional variables are not required for signaling, avoiding potential deadlocks due to incorrect locking semantics. Like tasks, the protected object is a built-in limited type, and it also has a declaration part and a body. A protected object consists of encapsulated private data (which can only be accessed from within the protected object), and procedures, functions and entries which are guaranteed to be mutually exclusive (with the only exception of functions, which are required to be side effect free and can therefore run concurrently with other functions). A task calling a protected object is blocked if another task is currently executing inside the same protected object, and released when this other task leaves the protected object. Blocked tasks are queued on the protected object ordered by time of arrival. Protected object entries are similar to procedures, but additionally have guards. If a guard evaluates to false, a calling task is blocked and added to the queue of that entry; now another task can be admitted to the protected object, as no task is currently executing inside the protected object. Guards are re-evaluated whenever a task leaves the protected object, as this is the only time when the evaluation of guards can have changed. Calls to entries can be requeued to other entries with the same signature. A task that is requeued is blocked and added to the queue of the target entry; this means that the protected object is released and allows admission of another task. The select statement in Ada can be used to implement non-blocking entry calls and accepts, non-deterministic selection of entries (also with guards), time-outs and aborts. The following example illustrates some concepts of concurrent programming in Ada. with Ada.Text_IO; use Ada.Text_IO; procedure Traffic is type Airplane_ID is range 1..10; -- 10 airplanes task type Airplane (ID: Airplane_ID); -- task representing airplanes, with ID as initialisation parameter type Airplane_Access is access Airplane; -- reference type to Airplane protected type Runway is -- the shared runway (protected to allow concurrent access) entry Assign_Aircraft (ID: Airplane_ID); -- all entries are guaranteed mutually exclusive entry Cleared_Runway (ID: Airplane_ID); entry Wait_For_Clear; private Clear: Boolean := True; -- protected private data - generally more than only a flag... end Runway; type Runway_Access is access all Runway; -- the air traffic controller task takes requests for takeoff and landing task type Controller (My_Runway: Runway_Access) is -- task entries for synchronous message passing entry Request_Takeoff (ID: in Airplane_ID; Takeoff: out Runway_Access); entry Request_Approach(ID: in Airplane_ID; Approach: out Runway_Access); end Controller; -- allocation of instances Runway1 : aliased Runway; -- instantiate a runway Controller1: Controller (Runway1'Access); -- and a controller to manage it ------ the implementations of the above types ------ protected body Runway is entry Assign_Aircraft (ID: Airplane_ID) when Clear is -- the entry guard - calling tasks are blocked until the condition is true begin Clear := False; Put_Line (Airplane_ID'Image (ID) & " on runway "); end; entry Cleared_Runway (ID: Airplane_ID) when not Clear is begin Clear := True; Put_Line (Airplane_ID'Image (ID) & " cleared runway "); end; entry Wait_For_Clear when Clear is begin null; -- no need to do anything here - a task can only enter if "Clear" is true end; end Runway; task body Controller is begin loop My_Runway.Wait_For_Clear; -- wait until runway is available (blocking call) select -- wait for two types of requests (whichever is runnable first) when Request_Approach'count = 0 => -- guard statement - only accept if there are no tasks queuing on Request_Approach accept Request_Takeoff (ID: in Airplane_ID; Takeoff: out Runway_Access) do -- start of synchronized part My_Runway.Assign_Aircraft (ID); -- reserve runway (potentially blocking call if protected object busy or entry guard false) Takeoff := My_Runway; -- assign "out" parameter value to tell airplane which runway end Request_Takeoff; -- end of the synchronised part or accept Request_Approach (ID: in Airplane_ID; Approach: out Runway_Access) do My_Runway.Assign_Aircraft (ID); Approach := My_Runway; end Request_Approach; or -- terminate if no tasks left who could call terminate; end select; end loop; end; task body Airplane is Rwy : Runway_Access; begin Controller1.Request_Takeoff (ID, Rwy); -- This call blocks until Controller task accepts and completes the accept block Put_Line (Airplane_ID'Image (ID) & " taking off..."); delay 2.0; Rwy.Cleared_Runway (ID); -- call will not block as "Clear" in Rwy is now false and no other tasks should be inside protected object delay 5.0; -- fly around a bit... loop select -- try to request a runway Controller1.Request_Approach (ID, Rwy); -- this is a blocking call - will run on controller reaching accept block and return on completion exit; -- if call returned we're clear for landing - leave select block and proceed... or delay 3.0; -- timeout - if no answer in 3 seconds, do something else (everything in following block) Put_Line (Airplane_ID'Image (ID) & " in holding pattern"); -- simply print a message end select; end loop; delay 4.0; -- do landing approach... Put_Line (Airplane_ID'Image (ID) & " touched down!"); Rwy.Cleared_Runway (ID); -- notify runway that we're done here. end; New_Airplane: Airplane_Access; begin for I in Airplane_ID'Range loop -- create a few airplane tasks New_Airplane := new Airplane (I); -- will start running directly after creation delay 4.0; end loop; end Traffic; Pragmas A pragma is a compiler directive that conveys information to the compiler to allow specific manipulating of compiled output. Certain pragmas are built into the language, while others are implementation-specific. Examples of common usage of compiler pragmas would be to disable certain features, such as run-time type checking or array subscript boundary checking, or to instruct the compiler to insert object code instead of a function call (as C/C++ does with inline functions). Generics See also Ada compilers APSE – a specification for a programming environment to support software development in Ada Ravenscar profile – a subset of the Ada tasking features designed for safety-critical hard real-time computing SPARK – a programming language consisting of a highly restricted subset of Ada, annotated with meta-information describing desired component behavior and individual runtime requirements References International standards ISO/IEC 8652: Information technology—Programming languages—Ada ISO/IEC 15291: Information technology—Programming languages—Ada Semantic Interface Specification (ASIS) ISO/IEC 18009: Information technology—Programming languages—Ada: Conformity assessment of a language processor (ACATS) IEEE Standard 1003.5b-1996, the POSIX Ada binding Ada Language Mapping Specification, the CORBA interface description language (IDL) to Ada mapping Rationale These documents have been published in various forms, including print. Also available apps.dtic.mil, pdf Books 795 pages. Archives Ada Programming Language Materials, 1981–1990. Charles Babbage Institute, University of Minnesota. Includes literature on software products designed for the Ada language; U.S. government publications, including Ada 9X project reports, technical reports, working papers, newsletters; and user group information. External links Ada - C/C++ changer - MapuSoft DOD Ada programming language (ANSI/MIL STD 1815A-1983) specification JTC1/SC22/WG9 ISO home of Ada Standards Programming languages .NET programming languages Avionics programming languages High Integrity Programming Language Multi-paradigm programming languages Programming language standards Programming languages created in 1980 Programming languages with an ISO standard Statically typed programming languages Systems programming languages 1980 software High-level programming languages Ada Lovelace	18
Alfonso Cuarón Orozco ( , ; born 28 November 1961) is a Mexican filmmaker. He is known for directing films in a variety of genres, including the family drama A Little Princess (1995), the romantic drama Great Expectations (1998), the coming of age road film Y tu mamá también (2001), the fantasy film Harry Potter and the Prisoner of Azkaban (2004), science fiction films such as Children of Men (2006) and Gravity (2013) and the semi-autobiographical drama Roma (2018). Cuarón has received 11 Academy Award nominations, winning four: Best Director for Gravity and Roma, Best Film Editing for Gravity, and Best Cinematography for Roma. He is the first Mexican filmmaker to win the Best Director award, and the second person to have been nominated for an Academy Award in seven different categories after Kenneth Branagh. Early life Cuarón was born in Mexico City, the son of Alfredo Cuarón, a doctor specializing in nuclear medicine, and Cristina Orozco, a pharmaceutical biochemist. He has a sister Christina, and two brothers; Carlos, also a filmmaker, and Alfredo, a conservation biologist. Cuarón studied philosophy at the National Autonomous University of Mexico and filmmaking at the Centro Universitario de Estudios Cinematográficos, a school within the same university. There he met the director Carlos Marcovich and cinematographer Emmanuel Lubezki, and they made what would be his first short film, Vengeance Is Mine. Career 1990s: Early career Cuarón began working on television in Mexico, first as a technician and then as a director. His television work led to assignments as an assistant director for several film productions including La Gran Fiesta, Gaby: A True Story and Romero, and in 1991 he landed his first big-screen directorial assignment. In 1991, Cuarón directed Sólo con tu pareja, a sex comedy about a womanizing businessman (played by Daniel Giménez Cacho) who, after having sex with an attractive nurse, is fooled into believing he's contracted AIDS. In addition to writing, producing and directing, Cuarón co-edited the film with Luis Patlán. The film, which also starred cabaret singer Astrid Hadad and model/actress Claudia Ramírez (with whom Cuarón was linked between 1989 and 1993) was a big hit in Mexico. After this success, director Sydney Pollack hired Cuarón to direct an episode of Fallen Angels, a series of neo-noir stories produced for the Showtime premium cable network in 1993; other directors who worked on the series included Steven Soderbergh, Jonathan Kaplan, Peter Bogdanovich, and Tom Hanks. In 1995, Cuarón released his first feature film produced in the United States, A Little Princess, an adaptation of Frances Hodgson Burnett's classic novel. Cuarón's next feature was also a literary adaptation, a modernized version of Charles Dickens's Great Expectations starring Ethan Hawke, Gwyneth Paltrow, and Robert De Niro. 2000s: International success In 2001, Cuarón found himself returning to Mexico with a Spanish-speaking cast to film Y tu mamá también, starring Gael García Bernal, Diego Luna and Maribel Verdú. It was a provocative and controversial road comedy about two sexually obsessed teenagers who take an extended road trip with an attractive married woman who is much older than them. The film's open portrayal of sexuality and frequent rude humor, as well as the politically and socially relevant asides, made the film an international hit and a major success with critics. Cuarón shared an Academy Award nomination for Best Original Screenplay with co-writer and brother Carlos Cuarón. In 2004, Cuarón directed the third film in the successful Harry Potter series, Harry Potter and the Prisoner of Azkaban. Cuarón faced criticism at the time from some Harry Potter fans for his approach to the film, notably its tendency to take more creative liberties with the source material than its predecessors. However, author J. K. Rowling, who had seen and loved Cuarón's film Y tu mamá también, said that it was her personal favorite from the series so far. Critically, the film was also better received than the first two installments, with some critics remarking its new tone and for being the first Harry Potter film to truly capture the essence of the novels. It has been subsequently rated by audience polls and critics as the best of the movie franchise series. In 2006, Cuarón's feature Children of Men, an adaptation of the P. D. James novel starring Clive Owen, Julianne Moore, and Michael Caine, received wide critical acclaim including three Academy Award nominations. Cuarón himself received two nominations for his work on the film, in Best Film Editing (with Alex Rodríguez) and Best Adapted Screenplay (with several collaborators). He created the production and distribution company Esperanto Filmoj ("Esperanto Films", named because of his support for the international language Esperanto), which has credits in the films Duck Season, Pan's Labyrinth, and Gravity. Cuarón also directed the controversial public service announcement I Am Autism for Autism Speaks that was criticized by disability rights groups for its negative portrayal of autism. 2010s: Awards success In 2010, Cuarón began to develop the film Gravity, a drama set in space. He was joined by producer David Heyman, with whom Cuarón worked on Harry Potter and the Prisoner of Azkaban. Starring Sandra Bullock and George Clooney, the film opened the 70th Venice International Film Festival in August. The film was then released in America in October 2013. The film became a financial success, earning 723.2 million at the box office against a budget of 130 million. The film also received many awards nominations. For the film, he received the Golden Globe Award in the category of Best Director. The film received ten Academy Award nominations, including Best Picture and Best Director. Cuarón won for Best Directing, becoming the first Latin American to win the award, while he and Mark Sanger received the award for Best Film Editing. In 2013, Cuarón created Believe, a science fiction/fantasy/adventure series that was broadcast as part of the 2013–14 United States network television schedule on NBC as a mid-season entry. The series was created by Cuarón for Bad Robot Productions and Warner Bros. Television. In 2014, Time placed him in its list of "100 Most Influential People in the World" – Pioneers. In May 2015, Cuarón was announced as the president of the jury for the 72nd Venice International Film Festival. Production began in fall 2016 for Cuarón's eighth film, Roma, a tale of a housekeeper for a middle class Mexican family in 1970s Mexico City, based on the life of his family's longtime maid, Liboria Rodríguez. The project was produced by Cuarón, Gabriela Rodríguez and Nicolás Celis and starred Yalitza Aparicio and Marina de Tavira both of whom received Oscar nominations. The film debuted at the 75th Venice International Film Festival, where it won the Golden Lion, and was distributed to select Mexican and American theaters before its online release on Netflix. Roma was highly acclaimed upon release; among its accolades are two Golden Globes (Golden Globe Award for Best Foreign Language Film and Best Director for Cuarón) and three Academy Awards (Best Director, Best Foreign Language Film, and Best Cinematography for Cuarón) out of a leading ten nominations. In 2019, Cuaron signed an overall TV deal at Apple. His first series for Apple will be the psychological thriller Disclaimer, which is set to star Cate Blanchett and Kevin Kline. Style Cuarón often uses long takes and moving cameras to emulate a documentary film style. Personal life Cuarón is a vegetarian and has been living in London since 2000. Cuarón's first marriage was to Mariana Elizondo with whom he has a son, Jonás Cuarón, born in 1981. Jonás is also a film director, known for Year of the Nail and Desierto. Alfonso's second marriage, from 2001 to 2008 was to Italian actress and freelance journalist Annalisa Bugliani, with whom he has two children. He has publicly shown his fascination for the Esperanto language and his support for the Esperanto movement. He called his production company Esperanto Filmoj. Filmography Awards and nominations See also Esperanto Filmoj Cha Cha Cha Films Cinema of Mexico List of Academy Award records References External links Alfonso Cuarón: A Life in Pictures, BAFTA webcast, 27 July 2007 1961 births Living people Best Cinematographer Academy Award winners Best Cinematography BAFTA Award winners Best Directing Academy Award winners Best Director AACTA International Award winners Best Director BAFTA Award winners Best Director Golden Globe winners Best Film Editing Academy Award winners Directors Guild of America Award winners Directors of Best Foreign Language Film Academy Award winners Directors of Golden Lion winners English-language film directors Fantasy film directors Filmmakers who won the Best Film BAFTA Award Filmmakers who won the Best Foreign Language Film BAFTA Award Film directors from Mexico City Hugo Award-winning writers Mexican cinematographers Mexican Esperantists Mexican expatriates in the United Kingdom Mexican film producers Mexican filmmakers Mexican people of Spanish descent Mexican screenwriters Mexican television directors Mexican television producers Mexican television writers National Autonomous University of Mexico alumni Nebula Award winners Science fiction film directors Spanish-language film directors Writers from Mexico City	6
The Advanced Encryption Standard (AES), also known by its original name Rijndael (), is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. AES is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen, who submitted a proposal to NIST during the AES selection process. Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits. AES has been adopted by the U.S. government. It supersedes the Data Encryption Standard (DES), which was published in 1977. The algorithm described by AES is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data. In the United States, AES was announced by the NIST as U.S. FIPS PUB 197 (FIPS 197) on November 26, 2001. This announcement followed a five-year standardization process in which fifteen competing designs were presented and evaluated, before the Rijndael cipher was selected as the most suitable. AES is included in the ISO/IEC 18033-3 standard. AES became effective as a U.S. federal government standard on May 26, 2002, after approval by U.S. Secretary of Commerce Donald Evans. AES is available in many different encryption packages, and is the first (and only) publicly accessible cipher approved by the U.S. National Security Agency (NSA) for top secret information when used in an NSA approved cryptographic module. Definitive standards The Advanced Encryption Standard (AES) is defined in each of: FIPS PUB 197: Advanced Encryption Standard (AES) ISO/IEC 18033-3: Block ciphers Description of the ciphers AES is based on a design principle known as a substitution–permutation network, and is efficient in both software and hardware. Unlike its predecessor DES, AES does not use a Feistel network. AES is a variant of Rijndael, with a fixed block size of 128 bits, and a key size of 128, 192, or 256 bits. By contrast, Rijndael per se is specified with block and key sizes that may be any multiple of 32 bits, with a minimum of 128 and a maximum of 256 bits. Most AES calculations are done in a particular finite field. AES operates on a 4 × 4 column-major order array of 16 bytes termed the state: The key size used for an AES cipher specifies the number of transformation rounds that convert the input, called the plaintext, into the final output, called the ciphertext. The number of rounds are as follows: 10 rounds for 128-bit keys. 12 rounds for 192-bit keys. 14 rounds for 256-bit keys. Each round consists of several processing steps, including one that depends on the encryption key itself. A set of reverse rounds are applied to transform ciphertext back into the original plaintext using the same encryption key. High-level description of the algorithm round keys are derived from the cipher key using the AES key schedule. AES requires a separate 128-bit round key block for each round plus one more. Initial round key addition: each byte of the state is combined with a byte of the round key using bitwise xor. 9, 11 or 13 rounds: a non-linear substitution step where each byte is replaced with another according to a lookup table. a transposition step where the last three rows of the state are shifted cyclically a certain number of steps. a linear mixing operation which operates on the columns of the state, combining the four bytes in each column. Final round (making 10, 12 or 14 rounds in total): The step In the step, each byte in the state array is replaced with a using an 8-bit substitution box. Note that before round 0, the state array is simply the plaintext/input. This operation provides the non-linearity in the cipher. The S-box used is derived from the multiplicative inverse over , known to have good non-linearity properties. To avoid attacks based on simple algebraic properties, the S-box is constructed by combining the inverse function with an invertible affine transformation. The S-box is also chosen to avoid any fixed points (and so is a derangement), i.e., , and also any opposite fixed points, i.e., . While performing the decryption, the step (the inverse of ) is used, which requires first taking the inverse of the affine transformation and then finding the multiplicative inverse. The step The step operates on the rows of the state; it cyclically shifts the bytes in each row by a certain offset. For AES, the first row is left unchanged. Each byte of the second row is shifted one to the left. Similarly, the third and fourth rows are shifted by offsets of two and three respectively. In this way, each column of the output state of the step is composed of bytes from each column of the input state. The importance of this step is to avoid the columns being encrypted independently, in which case AES would degenerate into four independent block ciphers. The step In the step, the four bytes of each column of the state are combined using an invertible linear transformation. The function takes four bytes as input and outputs four bytes, where each input byte affects all four output bytes. Together with , provides diffusion in the cipher. During this operation, each column is transformed using a fixed matrix (matrix left-multiplied by column gives new value of column in the state): Matrix multiplication is composed of multiplication and addition of the entries. Entries are bytes treated as coefficients of polynomial of order . Addition is simply XOR. Multiplication is modulo irreducible polynomial . If processed bit by bit, then, after shifting, a conditional XOR with 1B16 should be performed if the shifted value is larger than FF16 (overflow must be corrected by subtraction of generating polynomial). These are special cases of the usual multiplication in . In more general sense, each column is treated as a polynomial over and is then multiplied modulo with a fixed polynomial . The coefficients are displayed in their hexadecimal equivalent of the binary representation of bit polynomials from . The step can also be viewed as a multiplication by the shown particular MDS matrix in the finite field . This process is described further in the article Rijndael MixColumns. The In the step, the subkey is combined with the state. For each round, a subkey is derived from the main key using Rijndael's key schedule; each subkey is the same size as the state. The subkey is added by combining of the state with the corresponding byte of the subkey using bitwise XOR. Optimization of the cipher On systems with 32-bit or larger words, it is possible to speed up execution of this cipher by combining the and steps with the step by transforming them into a sequence of table lookups. This requires four 256-entry 32-bit tables (together occupying 4096 bytes). A round can then be performed with 16 table lookup operations and 12 32-bit exclusive-or operations, followed by four 32-bit exclusive-or operations in the step. Alternatively, the table lookup operation can be performed with a single 256-entry 32-bit table (occupying 1024 bytes) followed by circular rotation operations. Using a byte-oriented approach, it is possible to combine the , , and steps into a single round operation. Security The National Security Agency (NSA) reviewed all the AES finalists, including Rijndael, and stated that all of them were secure enough for U.S. Government non-classified data. In June 2003, the U.S. Government announced that AES could be used to protect classified information: The design and strength of all key lengths of the AES algorithm (i.e., 128, 192 and 256) are sufficient to protect classified information up to the SECRET level. TOP SECRET information will require use of either the 192 or 256 key lengths. The implementation of AES in products intended to protect national security systems and/or information must be reviewed and certified by NSA prior to their acquisition and use. AES has 10 rounds for 128-bit keys, 12 rounds for 192-bit keys, and 14 rounds for 256-bit keys. By 2006, the best known attacks were on 7 rounds for 128-bit keys, 8 rounds for 192-bit keys, and 9 rounds for 256-bit keys. Known attacks For cryptographers, a cryptographic "break" is anything faster than a brute-force attack – i.e., performing one trial decryption for each possible key in sequence. A break can thus include results that are infeasible with current technology. Despite being impractical, theoretical breaks can sometimes provide insight into vulnerability patterns. The largest successful publicly known brute-force attack against a widely implemented block-cipher encryption algorithm was against a 64-bit RC5 key by distributed.net in 2006. The key space increases by a factor of 2 for each additional bit of key length, and if every possible value of the key is equiprobable, this translates into a doubling of the average brute-force key search time. This implies that the effort of a brute-force search increases exponentially with key length. Key length in itself does not imply security against attacks, since there are ciphers with very long keys that have been found to be vulnerable. AES has a fairly simple algebraic framework. In 2002, a theoretical attack, named the "XSL attack", was announced by Nicolas Courtois and Josef Pieprzyk, purporting to show a weakness in the AES algorithm, partially due to the low complexity of its nonlinear components. Since then, other papers have shown that the attack, as originally presented, is unworkable; see XSL attack on block ciphers. During the AES selection process, developers of competing algorithms wrote of Rijndael's algorithm "we are concerned about [its] use ... in security-critical applications." In October 2000, however, at the end of the AES selection process, Bruce Schneier, a developer of the competing algorithm Twofish, wrote that while he thought successful academic attacks on Rijndael would be developed someday, he "did not believe that anyone will ever discover an attack that will allow someone to read Rijndael traffic." Until May 2009, the only successful published attacks against the full AES were side-channel attacks on some specific implementations. In 2009, a new related-key attack was discovered that exploits the simplicity of AES's key schedule and has a complexity of 2119. In December 2009 it was improved to 299.5. This is a follow-up to an attack discovered earlier in 2009 by Alex Biryukov, Dmitry Khovratovich, and Ivica Nikolić, with a complexity of 296 for one out of every 235 keys. However, related-key attacks are not of concern in any properly designed cryptographic protocol, as a properly designed protocol (i.e., implementational software) will take care not to allow related keys, essentially by constraining an attacker's means of selecting keys for relatedness. Another attack was blogged by Bruce Schneier on July 30, 2009, and released as a preprint on August 3, 2009. This new attack, by Alex Biryukov, Orr Dunkelman, Nathan Keller, Dmitry Khovratovich, and Adi Shamir, is against AES-256 that uses only two related keys and 239 time to recover the complete 256-bit key of a 9-round version, or 245 time for a 10-round version with a stronger type of related subkey attack, or 270 time for an 11-round version. 256-bit AES uses 14 rounds, so these attacks are not effective against full AES. The practicality of these attacks with stronger related keys has been criticized, for instance, by the paper on chosen-key-relations-in-the-middle attacks on AES-128 authored by Vincent Rijmen in 2010. In November 2009, the first known-key distinguishing attack against a reduced 8-round version of AES-128 was released as a preprint. This known-key distinguishing attack is an improvement of the rebound, or the start-from-the-middle attack, against AES-like permutations, which view two consecutive rounds of permutation as the application of a so-called Super-S-box. It works on the 8-round version of AES-128, with a time complexity of 248, and a memory complexity of 232. 128-bit AES uses 10 rounds, so this attack is not effective against full AES-128. The first key-recovery attacks on full AES were by Andrey Bogdanov, Dmitry Khovratovich, and Christian Rechberger, and were published in 2011. The attack is a biclique attack and is faster than brute force by a factor of about four. It requires 2126.2 operations to recover an AES-128 key. For AES-192 and AES-256, 2190.2 and 2254.6 operations are needed, respectively. This result has been further improved to 2126.0 for AES-128, 2189.9 for AES-192 and 2254.3 for AES-256, which are the current best results in key recovery attack against AES. This is a very small gain, as a 126-bit key (instead of 128-bits) would still take billions of years to brute force on current and foreseeable hardware. Also, the authors calculate the best attack using their technique on AES with a 128-bit key requires storing 288 bits of data. That works out to about 38 trillion terabytes of data, which is more than all the data stored on all the computers on the planet in 2016. As such, there are no practical implications on AES security. The space complexity has later been improved to 256 bits, which is 9007 terabytes (while still keeping a time complexity of 2126.2). According to the Snowden documents, the NSA is doing research on whether a cryptographic attack based on tau statistic may help to break AES. At present, there is no known practical attack that would allow someone without knowledge of the key to read data encrypted by AES when correctly implemented. Side-channel attacks Side-channel attacks do not attack the cipher as a black box, and thus are not related to cipher security as defined in the classical context, but are important in practice. They attack implementations of the cipher on hardware or software systems that inadvertently leak data. There are several such known attacks on various implementations of AES. In April 2005, D. J. Bernstein announced a cache-timing attack that he used to break a custom server that used OpenSSL's AES encryption. The attack required over 200 million chosen plaintexts. The custom server was designed to give out as much timing information as possible (the server reports back the number of machine cycles taken by the encryption operation). However, as Bernstein pointed out, "reducing the precision of the server's timestamps, or eliminating them from the server's responses, does not stop the attack: the client simply uses round-trip timings based on its local clock, and compensates for the increased noise by averaging over a larger number of samples." In October 2005, Dag Arne Osvik, Adi Shamir and Eran Tromer presented a paper demonstrating several cache-timing attacks against the implementations in AES found in OpenSSL and Linux's dm-crypt partition encryption function. One attack was able to obtain an entire AES key after only 800 operations triggering encryptions, in a total of 65 milliseconds. This attack requires the attacker to be able to run programs on the same system or platform that is performing AES. In December 2009 an attack on some hardware implementations was published that used differential fault analysis and allows recovery of a key with a complexity of 232. In November 2010 Endre Bangerter, David Gullasch and Stephan Krenn published a paper which described a practical approach to a "near real time" recovery of secret keys from AES-128 without the need for either cipher text or plaintext. The approach also works on AES-128 implementations that use compression tables, such as OpenSSL. Like some earlier attacks, this one requires the ability to run unprivileged code on the system performing the AES encryption, which may be achieved by malware infection far more easily than commandeering the root account. In March 2016, Ashokkumar C., Ravi Prakash Giri and Bernard Menezes presented a side-channel attack on AES implementations that can recover the complete 128-bit AES key in just 6–7 blocks of plaintext/ciphertext, which is a substantial improvement over previous works that require between 100 and a million encryptions. The proposed attack requires standard user privilege and key-retrieval algorithms run under a minute. Many modern CPUs have built-in hardware instructions for AES, which protect against timing-related side-channel attacks. Quantum attacks AES-256 is considered to be quantum resistant, as it has similar quantum resistance to AES-128's resistance against traditional, non-quantum, attacks. Whilst AES-192 and AES-128 are not considered quantum resistant due to their smaller key sizes. AES-192 has a strength of 96-bits against quantum attacks and AES-128 has 64-bits of strength against quantum attacks, making them both insecure. NIST/CSEC validation The Cryptographic Module Validation Program (CMVP) is operated jointly by the United States Government's National Institute of Standards and Technology (NIST) Computer Security Division and the Communications Security Establishment (CSE) of the Government of Canada. The use of cryptographic modules validated to NIST FIPS 140-2 is required by the United States Government for encryption of all data that has a classification of Sensitive but Unclassified (SBU) or above. From NSTISSP #11, National Policy Governing the Acquisition of Information Assurance: “Encryption products for protecting classified information will be certified by NSA, and encryption products intended for protecting sensitive information will be certified in accordance with NIST FIPS 140-2.” The Government of Canada also recommends the use of FIPS 140 validated cryptographic modules in unclassified applications of its departments. Although NIST publication 197 (“FIPS 197”) is the unique document that covers the AES algorithm, vendors typically approach the CMVP under FIPS 140 and ask to have several algorithms (such as Triple DES or SHA1) validated at the same time. Therefore, it is rare to find cryptographic modules that are uniquely FIPS 197 validated and NIST itself does not generally take the time to list FIPS 197 validated modules separately on its public web site. Instead, FIPS 197 validation is typically just listed as an "FIPS approved: AES" notation (with a specific FIPS 197 certificate number) in the current list of FIPS 140 validated cryptographic modules. The Cryptographic Algorithm Validation Program (CAVP) allows for independent validation of the correct implementation of the AES algorithm. Successful validation results in being listed on the NIST validations page. This testing is a pre-requisite for the FIPS 140-2 module validation. However, successful CAVP validation in no way implies that the cryptographic module implementing the algorithm is secure. A cryptographic module lacking FIPS 140-2 validation or specific approval by the NSA is not deemed secure by the US Government and cannot be used to protect government data. FIPS 140-2 validation is challenging to achieve both technically and fiscally. There is a standardized battery of tests as well as an element of source code review that must be passed over a period of a few weeks. The cost to perform these tests through an approved laboratory can be significant (e.g., well over $30,000 US) and does not include the time it takes to write, test, document and prepare a module for validation. After validation, modules must be re-submitted and re-evaluated if they are changed in any way. This can vary from simple paperwork updates if the security functionality did not change to a more substantial set of re-testing if the security functionality was impacted by the change. Test vectors Test vectors are a set of known ciphers for a given input and key. NIST distributes the reference of AES test vectors as AES Known Answer Test (KAT) Vectors. Performance High speed and low RAM requirements were some of the criteria of the AES selection process. As the chosen algorithm, AES performed well on a wide variety of hardware, from 8-bit smart cards to high-performance computers. On a Pentium Pro, AES encryption requires 18 clock cycles per byte, equivalent to a throughput of about 11 MiB/s for a 200 MHz processor. On Intel Core and AMD Ryzen CPUs supporting AES-NI instruction set extensions, throughput can be multiple GiB/s (even over 15 GiB/s on an i7-12700k). Implementations See also AES modes of operation Disk encryption Encryption Whirlpool – hash function created by Vincent Rijmen and Paulo S. L. M. Barreto List of free and open-source software packages Notes References alternate link (companion web site contains online lectures on AES) External links AES algorithm archive information – (old, unmaintained) Animation of Rijndael – AES deeply explained and animated using Flash (by Enrique Zabala / University ORT / Montevideo / Uruguay). This animation (in English, Spanish, and German) is also part of CrypTool 1 (menu Indiv. Procedures → Visualization of Algorithms → AES). HTML5 Animation of Rijndael – Same Animation as above made in HTML5. Advanced Encryption Standard Cryptography	17
Anisotropy () is the structural property of non-uniformity in different directions, as opposed to isotropy. An anisotropic object or pattern has properties that differ according to direction of measurement. For example, many materials exhibit very different properties when measured along different axes: physical or mechanical properties (absorbance, refractive index, conductivity, tensile strength, etc.). An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it because of the directional non-uniformity of the grain (the grain is the same in one direction, not all directions). Fields of interest Computer graphics In the field of computer graphics, an anisotropic surface changes in appearance as it rotates about its geometric normal, as is the case with velvet. Anisotropic filtering (AF) is a method of enhancing the image quality of textures on surfaces that are far away and steeply angled with respect to the point of view. Older techniques, such as bilinear and trilinear filtering, do not take into account the angle a surface is viewed from, which can result in aliasing or blurring of textures. By reducing detail in one direction more than another, these effects can be reduced easily. Chemistry A chemical anisotropic filter, as used to filter particles, is a filter with increasingly smaller interstitial spaces in the direction of filtration so that the proximal regions filter out larger particles and distal regions increasingly remove smaller particles, resulting in greater flow-through and more efficient filtration. In fluorescence spectroscopy, the fluorescence anisotropy, calculated from the polarization properties of fluorescence from samples excited with plane-polarized light, is used, e.g., to determine the shape of a macromolecule. Anisotropy measurements reveal the average angular displacement of the fluorophore that occurs between absorption and subsequent emission of a photon. In NMR spectroscopy, the orientation of nuclei with respect to the applied magnetic field determines their chemical shift. In this context, anisotropic systems refer to the electron distribution of molecules with abnormally high electron density, like the pi system of benzene. This abnormal electron density affects the applied magnetic field and causes the observed chemical shift to change. Real-world imagery Images of a gravity-bound or man-made environment are particularly anisotropic in the orientation domain, with more image structure located at orientations parallel with or orthogonal to the direction of gravity (vertical and horizontal). Physics Physicists from University of California, Berkeley reported about their detection of the cosmic anisotropy in cosmic microwave background radiation in 1977. Their experiment demonstrated the Doppler shift caused by the movement of the earth with respect to the early Universe matter, the source of the radiation. Cosmic anisotropy has also been seen in the alignment of galaxies' rotation axes and polarization angles of quasars. Physicists use the term anisotropy to describe direction-dependent properties of materials. Magnetic anisotropy, for example, may occur in a plasma, so that its magnetic field is oriented in a preferred direction. Plasmas may also show "filamentation" (such as that seen in lightning or a plasma globe) that is directional. An anisotropic liquid has the fluidity of a normal liquid, but has an average structural order relative to each other along the molecular axis, unlike water or chloroform, which contain no structural ordering of the molecules. Liquid crystals are examples of anisotropic liquids. Some materials conduct heat in a way that is isotropic, that is independent of spatial orientation around the heat source. Heat conduction is more commonly anisotropic, which implies that detailed geometric modeling of typically diverse materials being thermally managed is required. The materials used to transfer and reject heat from the heat source in electronics are often anisotropic. Many crystals are anisotropic to light ("optical anisotropy"), and exhibit properties such as birefringence. Crystal optics describes light propagation in these media. An "axis of anisotropy" is defined as the axis along which isotropy is broken (or an axis of symmetry, such as normal to crystalline layers). Some materials can have multiple such optical axes. Geophysics and geology Seismic anisotropy is the variation of seismic wavespeed with direction. Seismic anisotropy is an indicator of long range order in a material, where features smaller than the seismic wavelength (e.g., crystals, cracks, pores, layers, or inclusions) have a dominant alignment. This alignment leads to a directional variation of elasticity wavespeed. Measuring the effects of anisotropy in seismic data can provide important information about processes and mineralogy in the Earth; significant seismic anisotropy has been detected in the Earth's crust, mantle, and inner core. Geological formations with distinct layers of sedimentary material can exhibit electrical anisotropy; electrical conductivity in one direction (e.g. parallel to a layer), is different from that in another (e.g. perpendicular to a layer). This property is used in the gas and oil exploration industry to identify hydrocarbon-bearing sands in sequences of sand and shale. Sand-bearing hydrocarbon assets have high resistivity (low conductivity), whereas shales have lower resistivity. Formation evaluation instruments measure this conductivity or resistivity, and the results are used to help find oil and gas in wells. The mechanical anisotropy measured for some of the sedimentary rocks like coal and shale can change with corresponding changes in their surface properties like sorption when gases are produced from the coal and shale reservoirs. The hydraulic conductivity of aquifers is often anisotropic for the same reason. When calculating groundwater flow to drains or to wells, the difference between horizontal and vertical permeability must be taken into account; otherwise the results may be subject to error. Most common rock-forming minerals are anisotropic, including quartz and feldspar. Anisotropy in minerals is most reliably seen in their optical properties. An example of an isotropic mineral is garnet. Medical acoustics Anisotropy is also a well-known property in medical ultrasound imaging describing a different resulting echogenicity of soft tissues, such as tendons, when the angle of the transducer is changed. Tendon fibers appear hyperechoic (bright) when the transducer is perpendicular to the tendon, but can appear hypoechoic (darker) when the transducer is angled obliquely. This can be a source of interpretation error for inexperienced practitioners. Materials science and engineering Anisotropy, in materials science, is a material's directional dependence of a physical property. This is a critical consideration for materials selection in engineering applications. A material with physical properties that are symmetric about an axis that is normal to a plane of isotropy is called a transversely isotropic material. Tensor descriptions of material properties can be used to determine the directional dependence of that property. For a monocrystalline material, anisotropy is associated with the crystal symmetry in the sense that more symmetric crystal types have fewer independent coefficients in the tensor description of a given property. When a material is polycrystalline, the directional dependence on properties is often related to the processing techniques it has undergone. A material with randomly oriented grains will be isotropic, whereas materials with texture will be often be anisotropic. Textured materials are often the result of processing techniques like cold rolling, wire drawing, and heat treatment. Mechanical properties of materials such as Young's modulus, ductility, yield strength, and high-temperature creep rate, are often dependent on the direction of measurement. Fourth-rank tensor properties, like the elastic constants, are anisotropic, even for materials with cubic symmetry. The Young's modulus relates stress and strain when an isotropic material is elastically deformed; to describe elasticity in an anisotropic material, stiffness (or compliance) tensors are used instead. In metals, anisotropic elasticity behavior is present in all single crystals with three independent coefficients for cubic crystals, for example. For face-centered cubic materials such as nickel and copper, the stiffness is highest along the <111> direction, normal to the close-packed planes, and smallest parallel to <100>. Tungsten is so nearly isotropic at room temperature that it can be considered to have only two stiffness coefficients; aluminium is another metal that is nearly isotropic. For an isotropic material, where is the shear modulus, is the Young's modulus, and is the material's Poisson's ratio. Therefore, for cubic materials, we can think of anisotropy, , as the ratio between the empirically determined shear modulus for the cubic material and its (isotropic) equivalent: The latter expression is known as the Zener ratio, , where refers to elastic constants in Voigt (vector-matrix) notation. For an isotropic material, the ratio is one. Limitation of the Zener ratio to cubic materials is waived in the Tensorial anisotropy index AT that takes into consideration all the 27 components of the fully anisotropic stiffness tensor. It is composed of two major parts and , the former referring to components existing in cubic tensor and the latter in anisotropic tensor so that This first component includes the modified Zener ratio and additionally accounts for directional differences in the material, which exist in orthotropic material, for instance. The second component of this index covers the influence of stiffness coefficients that are nonzero only for non-cubic materials and remains zero otherwise. Fiber-reinforced or layered composite materials exhibit anisotropic mechanical properties, due to orientation of the reinforcement material. In many fiber-reinforced composites like carbon fiber or glass fiber based composites, the weave of the material (e.g. unidirectional or plain weave) can determine the extent of the anisotropy of the bulk material. The tunability of orientation of the fibers allows for application-based designs of composite materials, depending on the direction of stresses applied onto the material. Amorphous materials such as glass and polymers are typically isotropic. Due to the highly randomized orientation of macromolecules in polymeric materials, polymers are in general described as isotropic. However, mechanically gradient polymers can be engineered to have directionally dependent properties through processing techniques or introduction of anisotropy-inducing elements. Researchers have built composite materials with aligned fibers and voids to generate anisotropic hydrogels, in order to mimic hierarchically ordered biological soft matter. 3D printing, especially Fused Deposition Modeling, can introduce anisotropy into printed parts. This is due to the fact that FDM is designed to extrude and print layers of thermoplastic materials. This creates materials that are strong when tensile stress is applied in parallel to the layers and weak when the material is perpendicular to the layers. Microfabrication Anisotropic etching techniques (such as deep reactive-ion etching) are used in microfabrication processes to create well defined microscopic features with a high aspect ratio. These features are commonly used in MEMS (microelectromechanical systems) and microfluidic devices, where the anisotropy of the features is needed to impart desired optical, electrical, or physical properties to the device. Anisotropic etching can also refer to certain chemical etchants used to etch a certain material preferentially over certain crystallographic planes (e.g., KOH etching of silicon [100] produces pyramid-like structures) Neuroscience Diffusion tensor imaging is an MRI technique that involves measuring the fractional anisotropy of the random motion (Brownian motion) of water molecules in the brain. Water molecules located in fiber tracts are more likely to move anisotropically, since they are restricted in their movement (they move more in the dimension parallel to the fiber tract rather than in the two dimensions orthogonal to it), whereas water molecules dispersed in the rest of the brain have less restricted movement and therefore display more isotropy. This difference in fractional anisotropy is exploited to create a map of the fiber tracts in the brains of the individual. Remote sensing and radiative transfer modeling Radiance fields (see Bidirectional reflectance distribution function (BRDF)) from a reflective surface are often not isotropic in nature. This makes calculations of the total energy being reflected from any scene a difficult quantity to calculate. In remote sensing applications, anisotropy functions can be derived for specific scenes, immensely simplifying the calculation of the net reflectance or (thereby) the net irradiance of a scene. For example, let the BRDF be where 'i' denotes incident direction and 'v' denotes viewing direction (as if from a satellite or other instrument). And let P be the Planar Albedo, which represents the total reflectance from the scene. It is of interest because, with knowledge of the anisotropy function as defined, a measurement of the BRDF from a single viewing direction (say, ) yields a measure of the total scene reflectance (planar albedo) for that specific incident geometry (say, ). See also Circular symmetry References External links "Overview of Anisotropy" DoITPoMS Teaching and Learning Package: "Introduction to Anisotropy" "Gauge, and knitted fabric generally, is an anisotropic phenomenon" Orientation (geometry) Asymmetry	7
Extreme poverty is the most severe type of poverty, defined by the United Nations (UN) as "a condition characterized by severe deprivation of basic human needs, including food, safe drinking water, sanitation facilities, health, shelter, education and information. It depends not only on income but also on access to services". Historically, other definitions have been proposed within the United Nations. In 2018, extreme poverty mainly refers to an income below the international poverty line of $1.90 per day (in 2011 prices, $ in dollars), set by the World Bank. In October 2017, the World Bank updated the international poverty line, a global absolute minimum, to $1.90 a day. This is the equivalent of $1.00 a day in 1996 US prices, hence the widely used expression "living on less than a dollar a day". The vast majority of those in extreme poverty reside in South Asia and Sub-Saharan Africa. As of 2018, it is estimated that the country with the most people living in extreme poverty is Nigeria, at 86 million. In the past, the vast majority of the world population lived in conditions of extreme poverty. The percentage of the global population living in absolute poverty fell from over 80% in 1800 to under 20% by 2015. According to UN estimates, roughly 734 million people or 10% remained under those conditions. The number had previously been measured as 1.9 billion in 1990, and 1.2 billion in 2008. Despite the significant number of individuals still below the international poverty line, these figures represent significant progress for the international community, as they reflect a decrease of more than one billion people over 15 years. In public opinion surveys around the globe, people surveyed tend to think that extreme poverty has not decreased. The reduction of extreme poverty and hunger was the first Millennium Development Goal (MDG1), as set by the United Nations in 2000. Specifically, the target was to reduce the extreme poverty rate by half by 2015, a goal that was met five years ahead of schedule. In the Sustainable Development Goals, which succeeded the MDGs, the goal is to end extreme poverty in all its forms everywhere. With this declaration the international community, including the UN and the World Bank have adopted the target of ending extreme poverty by 2030. Definition Previous definitions In July 1993, Leandro Despouy, the then UN Special Rapporteur on extreme poverty and human rights made use of a definition he adapted from a 1987 report to the French Economic and Social Council by Fr. Joseph Wresinski, founder of the International Movement ATD Fourth World, distinguishing "lack of basic security" (poverty) and "chronic poverty" (extreme poverty), linking the eradication of extreme poverty by allowing people currently experiencing it a real opportunity to exercise all their human rights: "The lack of basic security connotes the absence of one or more factors enabling individuals and families to assume basic responsibilities and to enjoy fundamental rights. The situation may become widespread and result in more serious and permanent consequences. The lack of basic security leads to chronic poverty when it simultaneously affects several aspects of people's lives, when it is prolonged and when it severely compromises people's chances of regaining their rights and of reassuming their responsibilities in the foreseeable future." This definition was mentioned previously, in June 1989, in the preliminary report on the realization of economic, social and cultural rights by the UN Special Rapporteur Danilo Türk. It is still in use today, among others, in the current UN Guiding Principles on Extreme Poverty and Human Rights adopted by the UN Human Rights Council in September 2012 Consumption-based definition Extreme poverty is defined by the international community as living below $1.90 a day, as measured in 2011 international prices (equivalent to $2.12 in 2018). This number, also known as the international poverty line, is periodically updated to account for inflation and differences in the cost of living; it was originally defined at $1.00 a day in 1996. The updates are made according to new price data to portray the costs of basic food, health services, clothing, and shelter around the world as accurately as possible. The latest revision was made in 2015 when the World Bank increased the line to international- $1.90. Because many of the world's poorest people do not have a monetary income, the poverty measurement is based on the monetary value of a person's consumption. Otherwise the poverty measurement would be missing the home production of subsistence farmers that consume largely their own production. Alternative definitions The $1.90/day extreme poverty line remains the most widely used metric as it highlights the reality of those in the most severe conditions. Although widely used by most international organizations, it has come under scrutiny due to a variety of factors. For example, it does not account for how far below the line people are, referred to as the depth of poverty. For this purpose, the same institutions publish data on the poverty gap. The international poverty line is designed to stay constant over time, to allow comparisons between different years. It is therefore a measure of absolute poverty and is not measuring relative poverty. It is also not designed to capture how people view their own financial situation (known as the socially subjective poverty line). Moreover, the calculation of the poverty line relies on information about consumer prices to calculate purchasing power parity, which are very hard to measure and are necessarily debatable. As with all other metrics, there may also be missing data from the poorest and most fragile countries. Several alternative instruments for measuring extreme poverty have been suggested which incorporate other factors such as malnutrition and lack of access to a basic education. The Multidimensional Poverty Index (MPI), based on the Alkire-Foster Method, is published by the Oxford Poverty & Human Development Initiative (OPHI): it measures deprivation in basic needs and can be broken down to reflect both the incidence and the intensity of poverty. For example, under conventional measures, in both Ethiopia and Uzbekistan about 40% of the population is considered extremely poor, but based on the MPI, 90% of Ethiopians but only 2% of Uzbeks are in multidimensional poverty. The MPI is useful for development officials to determine the most likely causes of poverty within a region, using the M0 measure of the method (which is calculated by multiplying the fraction of people in poverty by the fraction of dimensions they are deprived in). For example, in the Gaza Strip of Palestine, using the M0 measure of the Alkire-Foster method reveals that poverty in the region is primarily caused by a lack of access to electricity, lack of access to drinking water, and widespread overcrowding. In contrast, data from the Chhukha District of Bhutan reveals that income is a much larger contributor to poverty as opposed to other dimensions within the region. However, the MPI only presents data from 105 countries, so it cannot be used for global measurements. Share of the population living in extreme poverty Current trends Getting to zero Using the World Bank definition of $1.90/day, , roughly 710 million people remained in extreme poverty (or roughly 1 in 10 people worldwide). Nearly half of them live in India and China, with more than 85% living in just 20 countries. Since the mid-1990s, there has been a steady decline in both the worldwide poverty rate and the total number of extreme poor. In 1990, the percentage of the global population living in extreme poverty was 43%, but in 2011, that percentage had dropped down to 21%. This halving of the extreme poverty rate falls in line with the first Millennium Development Goal (MDG1) proposed by former UN Secretary-General Kofi Annan, who called on the international community at the turn of the century to reduce the percentage of people in extreme poverty by half by 2015. This reduction in extreme poverty took place most notably in China, Indonesia, India, Pakistan and Vietnam. These five countries accounted for the alleviation of 715 million people out of extreme poverty between 1990 and 2010 – more than the global net total of roughly 700 million. This statistical oddity can be explained by the fact that the number of people living in extreme poverty in Sub-Saharan Africa rose from 290 million to 414 million over the same period. However, there have been many positive signs for extensive, global poverty reduction as well. Since 1999, the total number of extreme poor has declined by an average of 50 million per year. Moreover, in 2005, for the first time in recorded history, poverty rates began to fall in every region of the world, including Africa. As aforementioned, the number of people living in extreme poverty has reduced from 1.9 billion to 766 million over the span of the last decades. If we remain on our current trajectory, many economists predict we could reach global zero by 2030–2035, thus ending extreme poverty. Global zero entails a world in which fewer than 3% of the global population lives in extreme poverty (projected under most optimistic scenarios to be fewer than 200 million people). This zero figure is set at 3% in recognition of the fact that some amount of frictional (temporary) poverty will continue to exist, whether it is caused by political conflict or unexpected economic fluctuations, at least for the foreseeable future. However, the Brookings Institution notes that any projection about poverty more than a few years into the future runs the risk of being highly uncertain. This is because changes in consumption and distribution throughout the developing world over the next two decades could result in monumental shifts in global poverty, for better or worse. Others are more pessimistic about this possibility, predicting a range of 193 million to 660 million people still living in extreme poverty by 2035. Additionally, some believe the rate of poverty reduction will slow down in the developing world, especially in Africa, and as such it will take closer to five decades to reach global zero. Despite these reservations, several prominent international and national organizations, including the UN, the World Bank and the United States Federal Government (via USAID), have set a target of reaching global zero by the end of 2030. Exacerbating factors There are a variety of factors that may reinforce or instigate the existence of extreme poverty, such as weak institutions, cycles of violence and a low level of growth. Recent World Bank research shows that some countries can get caught in a "fragility trap", in which self-reinforcing factors prevent the poorest nations from emerging from low-level equilibrium in the long run. Moreover, most of the reduction in extreme poverty over the past twenty years has taken place in countries that have not experienced a civil conflict or have had governing institutions with a strong capacity to actually govern. Thus, to end extreme poverty, it is also important to focus on the interrelated problems of fragility and conflict. USAID defines fragility as a government's lack of both legitimacy (the perception the government is adequate at doing its job) and effectiveness (how good the government is at maintaining law and order, in an equitable manner). As fragile nations are unable to equitably and effectively perform the functions of a state, these countries are much more prone to violent unrest and mass inequality. Additionally, in countries with high levels of inequality (a common problem in countries with inadequate governing institutions), much higher growth rates are needed to reduce the rate of poverty when compared with other nations. Additionally, if China and India are removed from the equation, up to 70% of the world's poor live in fragile states by some definitions of fragility. Some analysts project that extreme poverty will be increasingly concentrated in fragile, low-income states like Haiti, Yemen and the Central African Republic. However, some academics, such as Andy Sumner, say that extreme poverty will be increasingly concentrated in middle-income countries, creating a paradox where the world's poor do not actually live in the poorest countries. To help low-income earners, fragile states make the transition towards peace and prosperity, the New Deal for Engagement in Fragile States, endorsed by roughly forty countries and multilateral institutions, was created in 2011. This represents an important step towards redressing the problem of fragility as it was originally articulated by self-identified fragile states who called on the international community to not only "do things differently", but to also "do different things". Civil conflict also remains a prime cause for the perpetuation of poverty throughout the developing world. Armed conflict can have severe effects on economic growth for many reasons such as the destruction of assets, destruction of livelihoods, creation of unwanted mass migration, and diversion of public resources towards war. Significantly, a country that experienced major violence during 1981–2005 had extreme poverty rates 21 percentage points higher than a country with no violence. On average, each civil conflict will cost a country roughly 30 years of GDP growth. Therefore, a renewed commitment from the international community to address the deteriorating situation in highly fragile states is necessary to both prevent the mass loss of life, but to also prevent the vicious cycle of extreme poverty. Population trends and dynamics (e.g. population growth) can also have a large impact on prospects for poverty reduction. According to the United Nations, "in addition to improving general health and well-being, analysis shows that meeting the reproductive health and contraceptive needs of all women in the developing world more than pays for itself"). In 2013, a prevalent finding in a report by the World Bank was that extreme poverty is most prevalent in low-income countries. In these countries, the World Bank found that progress in poverty reduction is the slowest, the poor live under the worst conditions, and the most affected persons are children age 12 and under. International initiatives Millennium Summit and Millennium Development Goals In September 2000, world leaders gathered at the Millennium Summit held in New York, launching the United Nations Millennium Project suggested by then UN Secretary-General Kofi Annan. Prior to the launch of the conference, the office of Secretary-General Annan released a report entitled "We The Peoples: The Role of the United Nations in the 21st Century". In this document, now widely known as the Millennium Report, Kofi Annan called on the international community to reduce the proportion of people in extreme poverty by half by 2015, a target that would affect over 1 billion people. Citing the close correlation between economic growth and the reduction of poverty in poor countries, Annan urged international leaders to indiscriminately target the problem of extreme poverty across every region. In charge of managing the project was Jeffrey Sachs, a noted development economist, who in 2005 released a plan for action called "Investing in Development: A Practical Plan to Achieve the Millennium Development Goals". Thomas Pogge criticized the 2000 Millennium Declaration for being less ambitious than a previous declaration from the World Food Summit due to using 1990 as the benchmark rather than 1996. Overall, there has been significant progress towards reducing extreme poverty, with the MDG1 target of reducing extreme poverty rates by half being met five years early, representing 700 million people being lifted out of extreme poverty from 1990 to 2010, with 1.2 billion people still remaining under those conditions. The notable exception to this trend was in Sub-Saharan Africa, the only region where the number of people living in extreme poverty rose from 290 million in 1990 to 414 million in 2010, comprising more than a third of those living in extreme poverty worldwide. 2005 World Summit The 2005 World Summit, held in September which was organized to measure international progress towards fulfilling the Millennium Development Goals (MDGs). Notably, the conference brought together more than 170 Heads of State. While world leaders at the summit were encouraged by the reduction of poverty in some nations, they were concerned by the uneven decline of poverty within and among different regions of the globe. However, at the end of the summit, the conference attendees reaffirmed the UN's commitment to achieve the MDGs by 2015 and urged all supranational, national and non-governmental organizations to follow suit. Sustainable Development Goals As the expiration of the Millennium Development Goals approached in 2015, the UN convened a panel to advise on a Post-2015 Development Agenda, which led to a new set of 17 goals for 2030 titled the Sustainable Development Goals (SDGs). The first goal (SDG 1) is to "End poverty in all its forms everywhere." The HLP report, entitled A New Global Partnership: Eradicate Poverty and Transform Economies Through Sustainable Development, was published in May 2013. In the report, the HLP wrote that: Ending extreme poverty is just the beginning, not the end. It is vital, but our vision must be broader: to start countries on the path of sustainable development – building on the foundations established by the 2012 UN Conference on Sustainable Development in Rio de Janeiro, and meeting a challenge that no country, developed or developing, has met so far. We recommend to the Secretary-General that deliberations on a new development agenda must be guided by the vision of eradicating extreme poverty once and for all, in the context of sustainable development. Therefore, the report determined that a central goal of the Post-Millennium Development agenda is to eradicate extreme poverty by 2030. However, the report also emphasized that the MDGs were not enough on their own, as they did not "focus on the devastating effects of conflict and violence on development ... the importance to development of good governance and institution ... nor the need for inclusive growth..." Consequently, there now exists synergy between the policy position papers put forward by the United States (through USAID), the World Bank and the UN itself in terms of viewing fragility and a lack of good governance as exacerbating extreme poverty. However, in a departure from the views of other organizations, the commission also proposed that the UN focus not only on extreme poverty (a line drawn at $1.25), but also on a higher target, such as $2. The report notes this change could be made to reflect the fact that escaping extreme poverty is only a first step. In addition to the UN, a host of other supranational and national actors such as the European Union and the African Union have published their own positions or recommendations on what should be incorporated in the Post-2015 agenda. The European Commission's communication, published in A decent Life for all: from vision to collective action, affirmed the UN's commitment to "eradicate extreme poverty in our lifetime and put the world on a sustainable path to ensure a decent life for all by 2030". A unique vision of the report was the commission's environmental focus (in addition to a plethora of other goals such as combating hunger and gender inequality). Specifically, the Commission argued, "long-term poverty reduction ... requires inclusive and sustainable growth. Growth should create decent jobs, take place with resource efficiency and within planetary boundaries, and should support efforts to mitigate climate change." The African Union's report, entitled Common African Position (CAP) on the Post-2015 Development Agenda, likewise encouraged the international community to focus on eradicating the twin problems of poverty and exclusion in our lifetime. Moreover, the CAP pledged that "no person – regardless of ethnicity, gender, geography, disability, race or other status – is denied universal human rights and basic economic opportunities". Least developed country conferences The UN least developed country (LDC) conferences were a series of summits organized by the UN to promote the substantial and even development of the world's least developed countries. The first UN LDC Conference was held between 1 and 14 September 1981, in Paris, the first UN LDC Conference was organized to finalize the UN's "Substantial New Programme of Action" for the 1980s in Least Developed Countries. This program, which was unanimously adopted by the conference attendees, argued for internal reforms in LDCs (meant to encourage economic growth) to be complemented by strong international measures. However, despite the major economic and policy reforms initiated many of these LDCs, in addition to strong international aid, the economic situation of these countries worsened as a whole in the 1980s. This prompted the organization of a 2nd UN LDC conference almost a decade later. The second UN LDC Conference was held between 3 and 14 September 1990, once again in Paris, the second UN LDC Conference was convened to measure the progress made by the LDCs towards fulfilling their development goals during the 1980s. Recognizing the problems that plagued the LDCs over the past decade, the conference formulated a new set of national and international policies to accelerate the growth rates of the poorest nations. These new principles were embodied in the "Paris Declaration and Programme of Action for the Least Developed Countries for the 1990s". The fourth UN LDC Conference was the most recent conference. It was held in May 2011 in Istanbul, recognized that the nature of development had fundamentally changed since the 1st conference held almost 30 years earlier. In the 21st century, the capital flow into emerging economies has increasingly become dominated by foreign direct investment and remittances, as opposed to bilateral and multilateral assistance. Moreover, since the 1980s, significant structural changes have taken place on the international stage. With the creation of the G-20 conference of the largest economic powers, including many nations in the Global South, formerly undeveloped nations are now able to have a much larger say in international relations. Furthermore, the conference recognized that in the midst of a deep global recession, coupled with multiple crises (energy, climate, food, etc.), the international community would have fewer resources to aid the LDCs. Thus, the UN considered the participation of a wide range of stakeholders (not least the LDCs themselves), crucial to the formulation of the conference. Organizations working to end extreme poverty International organizations World Bank In 2013, the Board of Governors of the World Bank Group (WBG) set two overriding goals for the WBG to commit itself to in the future. First, to end extreme poverty by 2030, an objective that echoes the sentiments of the UN and the Obama administration. Additionally, the WBG set an interim target of reducing extreme poverty to below 9% by 2020. Second, to focus on growth among the bottom 40% of people, as opposed to standard GDP growth. This commitment ensures that the growth of the developing world lifts people out of poverty, rather than exacerbating inequality. As the World Bank's primary focus is on delivering economic growth to enable equitable prosperity, its developments programs are primarily commercial-based in nature, as opposed to the UN. Since the World Bank recognizes better jobs will result in higher income, and thus less poverty, the WBG seeks to support employment training initiatives, small business development programs and strong labor protection laws. However, since much of the growth in the developing world has been inequitable, the World Bank has also begun teaming with client states to map out trends in inequality and to propose public policy changes that can level the playing field. Moreover, the World Bank engages in a variety of nutritional, transfer payments and transport-based initiatives. Children who experience under-nutrition from conception to two years of age have a much higher risk of physical and mental disability. Thus, they are often trapped in poverty and are unable to make a full contribution to the social and economic development of their communities as adults. The WBG estimates that as much as 3% of GDP can be lost as a result of under-nutrition among the poorest nations. To combat undernutrition, the WBG has partnered with UNICEF and the WHO to ensure all small children are fully fed. The WBG also offers conditional cash transfers to poor households who meet certain requirements such as maintaining children's healthcare or ensuring school attendance. Finally, the WBG understands investment in public transportation and better roads is key to breaking rural isolation, improving access to healthcare and providing better job opportunities for the World's poor. United Nations The UN Office for the Coordination of Humanitarian Affairs (OCHA) works to synchronize the disparate international, national and non-governmental efforts to contest poverty. OCHA seeks to prevent "confusion" in relief operations and to ensure that the humanitarian response to disaster situations has greater accountability and predictability. To do so, OCHA has begun deploying Humanitarian Coordinators and Country Teams to provide a solid architecture for the international community to work through. The United Nation's Children's Fund (UNICEF) was created by the UN to provide food, clothing and healthcare to European children facing famine and disease in the immediate aftermath of World War II. After the UN General Assembly extended UNICEF's mandate indefinitely in 1953, it actively worked to help children in extreme poverty in more than 190 countries and territories to overcome the obstacles that poverty, violence, disease and discrimination place in a child's path. Its current focus areas are 1) Child survival & development 2) Basic education & gender equality 3) Children and HIV/AIDS and 4) Child protection. The UN Refugee Agency (UNHCR) is mandated to lead and coordinate international action to protect refugees worldwide. Its primary purpose is to safeguard the rights of refugees by ensuring anyone can exercise the right to seek asylum in another state, with the option to return home voluntarily, integrate locally or resettle in a third country. The UNHCR operates in over 125 countries, helping approximately 33.9 million persons. The World Food Programme (WFP) is the largest agency dedicated to fighting hunger worldwide. On average, the WFP brings food assistance to more than 90 million people in 75 countries. The WFP not only strives to prevent hunger in the present, but also in the future by developing stronger communities which will make food even more secure on their own. The WFP has a range of expertise from Food Security Analysis, Nutrition, Food Procurement and Logistics. The World Health Organization (WHO) is responsible for providing leadership on global health matters, shaping the health research agenda, articulating evidence-based policy decisions and combating diseases that are induced from poverty, such as HIV/AIDS, malaria and tuberculosis. Moreover, the WHO deals with pressing issues ranging from managing water safety, to dealing with maternal and newborn health. Governmental agencies USAID The US Agency for International Development (USAID) is the lead US government agency dedicated to ending extreme poverty. Currently the largest bilateral donor in the world, the United States channels the majority of its development assistance through USAID and the US Department of State. In President Obama's 2013 State of the Union address, he declared, "So the United States will join with our allies to eradicate such extreme poverty in the next two decades ... which is within our reach." In response to Obama's call to action, USAID has made ending extreme poverty central to its mission statement. Under its New Model of Development, USAID seeks to eradicate extreme poverty through the use of innovation in science and technology, by putting a greater emphasis on evidence based decision-making, and through leveraging the ingenuity of the private sector and global citizens. A major initiative of the Obama Administration is Power Africa, which aims to bring energy to 20 million people in Sub-Saharan Africa. By reaching out to its international partners, whether commercial or public, the US has leveraged over $14 billion in outside commitments after investing only US$7 billion of its own. To ensure that Power Africa reaches the region's poorest, the initiative engages in a transaction based approach to create systematic change. This includes expanding access to electricity to more than 20,000 additional households which already live without power. In terms of specific programming, USAID works in a variety of fields from preventing hunger, reducing HIV/AIDS, providing general health assistance and democracy assistance, as well as dealing with gender issues. To deal with food security, which affects roughly 842 million people (who go to bed hungry each night), USAID coordinates the Feed the Future Initiative (FtF). FtF aims to reduce poverty and under-nutrition each by 20% over five years. Because of the President's Emergency Plan for AIDS Relief (PEPFAR) and a variety of congruent actors, the incidence of AIDS and HIV, which used to ravage Africa, reduced in scope and intensity. Through PEPFAR, the United States has ensured over five million people have received life-saving antiviral drugs, a significant proportion of the eight million people receiving treatment in relatively poor nations. In terms of general health assistance, USAID has worked to reduce maternal mortality by 30%, under-five child mortality by 35%, and has accomplished a host of other goals. USAID also supports the gamut of democratic initiatives, from promoting human rights and accountable, fair governance, to supporting free and fair elections and the rule of law. In pursuit of these goals, USAID has increased global political participation by training more than 9,800 domestic election observers and providing civic education to more than 6.5 million people. Since 2012, the Agency has begun integrating critical gender perspectives across all aspects of its programming to ensure all USAID initiatives work to eliminate gender disparities. To do so, USAID seeks to increase the capability of women and girls to realize their rights and determine their own life outcomes. Moreover, USAID supports additional programs to improve women's access to capital and markets, builds theirs skills in agriculture, and supports women's desire to own businesses. Others Other major government development agencies with annual aid programmes of more than $10 billion include: GIZ (Germany), FCDO (United Kingdom), JICA (Japan), European Union and AFD (France). Non-Governmental Organizations A multitude of non-governmental organizations operate in the field of extreme poverty, actively working to alleviate the poorest of the poor of their deprivation. To name but a few notable organizations: Save the Children, the Overseas Development Institute, Concern Worldwide, ONE, Trickle Up and Oxfam have all done a considerable amount of work in extreme poverty. Save the Children is the leading international organization dedicated to helping the world's indigent children. In 2013, Save the Children reached over 143 million children through their work, including over 52 million children directly. Save the Children also recently released their own report titled "Getting to Zero", in which they argued the international community could feasibly do more than lift the world's poor above $1.25/day. The Overseas Development Institute (ODI) is a UK based think tank on international development and humanitarian issues. ODI is dedicated to alleviating the suffering of the world's poor by providing high-quality research and practical policy advice to the World's development officials. ODI also recently released a paper entitled, "The Chronic Poverty Report 2014–2015: The road to zero extreme poverty", in which its authors assert that though the international communities' goal of ending extreme poverty by 2030 is laudable, much more targeted resources will be necessary to reach said target. The report states that "To eradicate extreme poverty, massive global investment is required in social assistance, education and pro-poorest economic growth". Concern Worldwide is an international humanitarian organization whose mission is to end extreme poverty by influencing decision makers at all levels of government (from local to international). Concern has also produced a report on extreme poverty in which they explain their own conception of extreme poverty from a NGO's standpoint. In this paper, named "How Concern Understands Extreme Poverty", the report's creators write that extreme poverty entails more than just living under $1.25/day, it also includes having a small number of assets and being vulnerable to severe negative shocks (whether natural or man made). ONE, the organization co-founded by Bono, is a non-profit organization funded almost entirely by foundations, individual philanthropists and corporations. ONE's goals include raising public awareness and working with political leaders to fight preventable diseases, increase government accountability and increase investment in nutrition. Finally, trickleUp is a micro-enterprise development program targeted at those living on under $1.25/day, which provides the indigent with resources to build a sustainable livelihood through both direct financing and considerable training efforts. Oxfam is a non-governmental organization that works prominently in Africa; their mission is to improve local community organizations and it works to reduce impediments to the development of the country. Oxfam helps families suffering from poverty receive food and healthcare to survive. There are many children in Africa experiencing growth stunting, and this is one example of an issue that Oxfam targets and aims to resolve. Cash transfers appear to be an effective intervention for reducing extreme poverty, while at the same time improving health and education outcomes. Campaigns Giving What We Can Global Poverty Project Live Below the Line Make Poverty History See also List of countries by percentage of population living in poverty Income inequality metrics Least developed countries Poverty threshold Poverty reduction Millennium Development Goals (2015) Sustainable Development Goals (2030) Notes References External links Eradicate Extreme Poverty and Hunger by 2015 \| UN Millennium Development Goal curated by the Center for Latin American and Caribbean Studies at Michigan State University The Life You Can Save – Acting Now to End World Poverty Scientific American Magazine (September 2005 Issue) Can Extreme Poverty Be Eliminated? International Movement ATD Fourth World Walk In Her Shoes Measurements and definitions of poverty	15
The analytical engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. It was first described in 1837 as the successor to Babbage's difference engine, which was a design for a simpler mechanical calculator. The analytical engine incorporated an arithmetic logic unit, control flow in the form of conditional branching and loops, and integrated memory, making it the first design for a general-purpose computer that could be described in modern terms as Turing-complete. In other words, the structure of the analytical engine was essentially the same as that which has dominated computer design in the electronic era. The analytical engine is one of the most successful achievements of Charles Babbage. Babbage was never able to complete construction of any of his machines due to conflicts with his chief engineer and inadequate funding. It was not until 1941 that Konrad Zuse built the first general-purpose computer, Z3, more than a century after Babbage had proposed the pioneering analytical engine in 1837. Design Babbage's first attempt at a mechanical computing device, the Difference Engine, was a special-purpose machine designed to tabulate logarithms and trigonometric functions by evaluating finite differences to create approximating polynomials. Construction of this machine was never completed; Babbage had conflicts with his chief engineer, Joseph Clement, and ultimately the British government withdrew its funding for the project. During this project, Babbage realised that a much more general design, the analytical engine, was possible. The work on the design of the analytical engine started around 1833. The input, consisting of programs ("formulae") and data, was to be provided to the machine via punched cards, a method being used at the time to direct mechanical looms such as the Jacquard loom. For output, the machine would have a printer, a curve plotter, and a bell. The machine would also be able to punch numbers onto cards to be read in later. It employed ordinary base-10 fixed-point arithmetic. There was to be a store (that is, a memory) capable of holding 1,000 numbers of 50 decimal digits each (ca. 16.6 kB). An arithmetic unit (the "mill") would be able to perform all four arithmetic operations, plus comparisons and optionally square roots. Initially (1838) it was conceived as a difference engine curved back upon itself, in a generally circular layout, with the long store exiting off to one side. Later drawings (1858) depict a regularised grid layout. Like the central processing unit (CPU) in a modern computer, the mill would rely upon its own internal procedures, to be stored in the form of pegs inserted into rotating drums called "barrels", to carry out some of the more complex instructions the user's program might specify. The programming language to be employed by users was akin to modern day assembly languages. Loops and conditional branching were possible, and so the language as conceived would have been Turing-complete as later defined by Alan Turing. Three different types of punch cards were used: one for arithmetical operations, one for numerical constants, and one for load and store operations, transferring numbers from the store to the arithmetical unit or back. There were three separate readers for the three types of cards. Babbage developed some two dozen programs for the analytical engine between 1837 and 1840, and one program later. These programs treat polynomials, iterative formulas, Gaussian elimination, and Bernoulli numbers. In 1842, the Italian mathematician Luigi Federico Menabrea published a description of the engine in French, based on lectures Babbage gave when he visited Turin in 1840. In 1843, the description was translated into English and extensively annotated by Ada Lovelace, who had become interested in the engine eight years earlier. In recognition of her additions to Menabrea's paper, which included a way to calculate Bernoulli numbers using the machine (widely considered to be the first complete computer program), she has been described as the first computer programmer. Construction Late in his life, Babbage sought ways to build a simplified version of the machine, and assembled a small part of it before his death in 1871. In 1878, a committee of the British Association for the Advancement of Science described the analytical engine as "a marvel of mechanical ingenuity", but recommended against constructing it. The committee acknowledged the usefulness and value of the machine, but could not estimate the cost of building it, and were unsure whether the machine would function correctly after being built. Intermittently from 1880 to 1910, Babbage's son Henry Prevost Babbage was constructing a part of the mill and the printing apparatus. In 1910, it was able to calculate a (faulty) list of multiples of pi. This constituted only a small part of the whole engine; it was not programmable and had no storage. (Popular images of this section have sometimes been mislabelled, implying that it was the entire mill or even the entire engine.) Henry Babbage's "analytical engine mill" is on display at the Science Museum in London. Henry also proposed building a demonstration version of the full engine, with a smaller storage capacity: "perhaps for a first machine ten (columns) would do, with fifteen wheels in each". Such a version could manipulate 20 numbers of 25 digits each, and what it could be told to do with those numbers could still be impressive. "It is only a question of cards and time", wrote Henry Babbage in 1888, "... and there is no reason why (twenty thousand) cards should not be used if necessary, in an analytical engine for the purposes of the mathematician". In 1991, the London Science Museum built a complete and working specimen of Babbage's Difference Engine No. 2, a design that incorporated refinements Babbage discovered during the development of the analytical engine. This machine was built using materials and engineering tolerances that would have been available to Babbage, quelling the suggestion that Babbage's designs could not have been produced using the manufacturing technology of his time. In October 2010, John Graham-Cumming started a "Plan 28" campaign to raise funds by "public subscription" to enable serious historical and academic study of Babbage's plans, with a view to then build and test a fully working virtual design which will then in turn enable construction of the physical analytical engine. As of May 2016, actual construction had not been attempted, since no consistent understanding could yet be obtained from Babbage's original design drawings. In particular it was unclear whether it could handle the indexed variables which were required for Lovelace's Bernoulli program. By 2017, the "Plan 28" effort reported that a searchable database of all catalogued material was available, and an initial review of Babbage's voluminous Scribbling Books had been completed. Many of Babbage's original drawings have been digitised and are publicly available online. Instruction set Babbage is not known to have written down an explicit set of instructions for the engine in the manner of a modern processor manual. Instead he showed his programs as lists of states during their execution, showing what operator was run at each step with little indication of how the control flow would be guided. Allan G. Bromley has assumed that the card deck could be read in forwards and backwards directions as a function of conditional branching after testing for conditions, which would make the engine Turing-complete: ...the cards could be ordered to move forward and reverse (and hence to loop)... The introduction for the first time, in 1845, of user operations for a variety of service functions including, most importantly, an effective system for user control of looping in user programs. There is no indication how the direction of turning of the operation and variable cards is specified. In the absence of other evidence I have had to adopt the minimal default assumption that both the operation and variable cards can only be turned backward as is necessary to implement the loops used in Babbage's sample programs. There would be no mechanical or microprogramming difficulty in placing the direction of motion under the control of the user. In their emulator of the engine, Fourmilab say: The Engine's Card Reader is not constrained to simply process the cards in a chain one after another from start to finish. It can, in addition, directed by the very cards it reads and advised by whether the Mill's run-up lever is activated, either advance the card chain forward, skipping the intervening cards, or backward, causing previously-read cards to be processed once again. This emulator does provide a written symbolic instruction set, though this has been constructed by its authors rather than based on Babbage's original works. For example, a factorial program would be written as: N0 6 N1 1 N2 1 × L1 L0 S1 – L0 L2 S0 L2 L0 CB?11 where the CB is the conditional branch instruction or "combination card" used to make the control flow jump, in this case backward by 11 cards. Influence Predicted influence Babbage understood that the existence of an automatic computer would kindle interest in the field now known as algorithmic efficiency, writing in his Passages from the Life of a Philosopher, "As soon as an analytical engine exists, it will necessarily guide the future course of the science. Whenever any result is sought by its aid, the question will then arise—By what course of calculation can these results be arrived at by the machine in the shortest time?" Computer science From 1872 Henry continued diligently with his father's work and then intermittently in retirement in 1875. Percy Ludgate wrote about the engine in 1914 and published his own design for an analytical engine in 1909. It was drawn up in detail, but never built, and the drawings have never been found. Ludgate's engine would be much smaller (about , which corresponds to cube of side length ) than Babbage's, and hypothetically would be capable of multiplying two 20-decimal-digit numbers in about six seconds. In his work Essays on Automatics (1914) Leonardo Torres Quevedo, inspired by Babbage, designed a theoretical electromechanical calculating machine which was to be controlled by a read-only program. The paper also contains the idea of floating-point arithmetic. In 1920, to celebrate the 100th anniversary of the invention of the arithmometer, Torres presented in Paris the Electromechanical Arithmometer, which consisted of an arithmetic unit connected to a (possibly remote) typewriter, on which commands could be typed and the results printed automatically. Vannevar Bush's paper Instrumental Analysis (1936) included several references to Babbage's work. In the same year he started the Rapid Arithmetical Machine project to investigate the problems of constructing an electronic digital computer. Despite this groundwork, Babbage's work fell into historical obscurity, and the analytical engine was unknown to builders of electromechanical and electronic computing machines in the 1930s and 1940s when they began their work, resulting in the need to re-invent many of the architectural innovations Babbage had proposed. Howard Aiken, who built the quickly-obsoleted electromechanical calculator, the Harvard Mark I, between 1937 and 1945, praised Babbage's work likely as a way of enhancing his own stature, but knew nothing of the analytical engine's architecture during the construction of the Mark I, and considered his visit to the constructed portion of the analytical engine "the greatest disappointment of my life". The Mark I showed no influence from the analytical engine and lacked the analytical engine's most prescient architectural feature, conditional branching. J. Presper Eckert and John W. Mauchly similarly were not aware of the details of Babbage's analytical engine work prior to the completion of their design for the first electronic general-purpose computer, the ENIAC. Comparison to other early computers If the analytical engine had been built, it would have been digital, programmable and Turing-complete. It would, however, have been very slow. Luigi Federico Menabrea reported in Sketch of the Analytical Engine: "Mr. Babbage believes he can, by his engine, form the product of two numbers, each containing twenty figures, in three minutes". By comparison the Harvard Mark I could perform the same task in just six seconds. A modern CPU could do the same thing in under a billionth of a second. In popular culture The cyberpunk novelists William Gibson and Bruce Sterling co-authored a steampunk novel of alternative history titled The Difference Engine in which Babbage's difference and analytical engines became available to Victorian society. The novel explores the consequences and implications of the early introduction of computational technology. Moriarty by Modem, a short story by Jack Nimersheim, describes an alternative history where Babbage's analytical engine was indeed completed and had been deemed highly classified by the British government. The characters of Sherlock Holmes and Moriarty had in reality been a set of prototype programs written for the analytical engine. This short story follows Holmes as his program is implemented on modern computers and he is forced to compete against his nemesis yet again in the modern counterparts of Babbage's analytical engine. A similar setting is used by Sydney Padua in the webcomic The Thrilling Adventures of Lovelace and Babbage. It features an alternative history where Ada Lovelace and Babbage have built the analytical engine and use it to fight crime at Queen Victoria's request. The comic is based on thorough research on the biographies of and correspondence between Babbage and Lovelace, which is then twisted for humorous effect. The Orion's Arm online project features the Machina Babbagenseii, fully sentient Babbage-inspired mechanical computers. Each is the size of a large asteroid, only capable of surviving in microgravity conditions, and processes data at 0.5% the speed of a human brain. References Bibliography External links The Babbage Papers, Science Museum archive The Analytical Engine at Fourmilab, includes historical documents and online simulations Image of a later Plan of Analytical Engine with grid layout (1858) First working Babbage "barrel" actually assembled, circa 2005 Special issue, IEEE Annals of the History of Computing, Volume 22, Number 4, October–December 2000 Babbage, Science Museum, London (archived) Plan 28: Building Charles Babbage's Analytical Engine Charles Babbage Computer-related introductions in 1837 English inventions Mechanical calculators Mechanical computers One-of-a-kind computers Ada Lovelace	10
Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian, was the founder of the Roman Empire; he reigned as the first Roman emperor from 27 BC until his death in AD 14. The reign of Augustus initiated an imperial cult as well as an era associated with imperial peace, the Pax Romana or Pax Augusta, in which the Roman world was largely free of armed conflict aside from expansionary wars and the Year of the Four Emperors. The Principate system of imperial rule established by Augustus lasted until the Crisis of the Third Century. Gaius Octavius was born into an old and wealthy equestrian branch of the plebeian gens Octavia. His maternal great-uncle Julius Caesar was assassinated in 44 BC, and Octavius was named in Caesar's will as his adopted son and heir; as a result, he inherited Caesar's name, estate, and the loyalty of his legions. He, Mark Antony, and Marcus Lepidus formed the Second Triumvirate to defeat the assassins of Caesar. Following their victory at the Battle of Philippi (42 BC), the Triumvirate divided the Roman Republic among themselves and ruled as de facto dictators. The Triumvirate was eventually torn apart by the competing ambitions of its members; Lepidus was exiled in 36 BC, and Antony was defeated by Octavian at the Battle of Actium in 31 BC. Antony and his wife Cleopatra, the Ptolemaic queen of Egypt, killed themselves during Octavian's invasion of Egypt, which then became a Roman province. After the demise of the Second Triumvirate, Augustus restored the outward facade of the free republic, with governmental power vested in the Roman Senate, the executive magistrates and the legislative assemblies, yet he maintained autocratic authority by having the Senate grant him lifetime tenure as commander-in-chief, tribune and censor. A similar ambiguity is seen in his chosen names, the implied rejection of monarchical titles whereby he called himself Princeps Civitatis (First Citizen) juxtaposed with his adoption of the title Augustus. Augustus dramatically enlarged the empire, annexing Egypt, Dalmatia, Pannonia, Noricum, and Raetia, expanding possessions in Africa, and completing the conquest of Hispania, but he suffered a major setback in Germania. Beyond the frontiers, he secured the empire with a buffer region of client states and made peace with the Parthian Empire through diplomacy. He reformed the Roman system of taxation, developed networks of roads with an official courier system, established a standing army, established the Praetorian Guard as well as official police and fire-fighting services for Rome, and rebuilt much of the city during his reign. Augustus died in AD 14 at age 75, probably from natural causes. Persistent rumors, substantiated somewhat by deaths in the imperial family, have claimed his wife Livia poisoned him. He was succeeded as emperor by his adopted son Tiberius, Livia's son and former husband of Augustus' only biological child Julia. Name As a consequence of Roman customs, society, and personal preference, Augustus ( ) was known by many names throughout his life: Gaius Octavius ( , ). According to Suetonius, the cognomen Thurinus () was added to his birth name as a toddler in 60 BC. Later, after he had taken the name of Caesar, his rival Mark Antony referred to him as "Thurinus" in order to belittle him. In response, he merely said he was surprised that "using his old name was thought to be an insult". Gaius Julius Caesar Octavianus. After his adoption by Julius Caesar on the latter's death in 44 BC, Octavian took Caesar's name, but was often distinguished from him as "Octavianus" (), denoting that he was a former member of the gens Octavia. He is mainly known by the anglicization "Octavian" ( ) for the period between 44 and 27 BC. Imperator Caesar. Octavian's early coins and inscriptions all refer to him simply as Gaius Caesar, but by 38 BC he had replaced "Gaius" with the victory title imperator ("commander"). Occasionally the epithet divi filius or ("son of the divine Julius") was included, alluding to Julius Caesar's deification in 42 BC. Imperator Caesar Augustus. On 16 January 27 BC, partly on his own insistence, the Roman Senate granted him the honorific Augustus (). Historians use this name to refer to him from 27 BC until his death in AD 14. The name is sometimes given as "Augustus Caesar". Early life Gaius Octavius was born in Rome on 23 September 63 BC. His paternal family was from the Volscian town of Velletri, approximately south-east of the city. He was born at Ox Head, a small property on the Palatine Hill, very close to the Roman Forum. In his childhood, he received the cognomen "Thurinus", possibly commemorating his father's victory at Thurii over a rebellious band of slaves which occurred a few years after his birth. Suetonius wrote: "There are many indications that the Octavian family was in days of old a distinguished one at Velitrae; for not only was a street in the most frequented part of town long ago called Octavian, but an altar was shown there besides, consecrated by an Octavius. This man was leader in a war with a neighbouring town ..." Due to the crowded nature of Rome at the time, Octavius was taken to his father's home village at Velletri to be raised. Octavius mentions his father's equestrian family only briefly in his memoirs. His paternal great-grandfather Gaius Octavius was a military tribune in Sicily during the Second Punic War. His grandfather had served in several local political offices. His father, also named Gaius Octavius, had been governor of Macedonia. His mother, Atia, was the niece of Julius Caesar. His father died in 59 BC when Octavius was four years old. His mother married a former governor of Syria, Lucius Marcius Philippus. Philippus claimed descent from Alexander the Great and was elected consul in 56 BC. Philippus never had much of an interest in young Octavius. Because of this, Octavius was raised by his grandmother, Julia, the sister of Julius Caesar. Julia died in 52 or 51 BC, and Octavius delivered the funeral oration for his grandmother. From this point, his mother and stepfather took a more active role in raising him. He donned the toga virilis ("toga of manhood") four years later and was elected to the College of Pontiffs in 47 BC. The following year he was put in charge of the Greek games that were staged in honor of the Temple of Venus Genetrix, built by Julius Caesar. According to Nicolaus of Damascus, Octavius wished to join Caesar's staff for his campaign in Africa but gave way when his mother protested. In 46 BC, she consented for him to join Caesar in Hispania, where he planned to fight the forces of Pompey, Caesar's late enemy, but Octavius fell ill and was unable to travel. When he had recovered, he sailed to the front but was shipwrecked. After coming ashore with a handful of companions, he crossed hostile territory to Caesar's camp, which impressed Caesar considerably. Velleius Paterculus reports that after that time, Caesar allowed the young man to share his carriage. When back in Rome, Caesar deposited a new will with the Vestal Virgins, naming Octavius as the prime beneficiary. Rise to power Heir to Caesar Octavius was studying and undergoing military training in Apollonia, Illyria, when Julius Caesar was assassinated on the Ides of March (15 March) 44 BC. He rejected the advice of some army officers to take refuge with the troops in Macedonia and sailed to Italy to ascertain whether he had any potential political fortunes or security. Caesar had no living legitimate children under Roman law and so had adopted Octavius, his grand-nephew, in his will, making him his primary heir. Mark Antony later charged that Octavian had earned his adoption by Caesar through sexual favours, though Suetonius describes Antony's accusation as political slander. This form of slander was popular during this time in the Roman Republic to demean and discredit political opponents by accusing them of having an inappropriate sexual affair. After landing at Lupiae near Brundisium, Octavius learned the contents of Caesar's will, and only then did he decide to become Caesar's political heir as well as heir to two-thirds of his estate. Upon his adoption, Octavius assumed his great-uncle's name Gaius Julius Caesar. Roman citizens adopted into a new family usually retained their old nomen in cognomen form (e.g., Octavianus for one who had been an Octavius, Aemilianus for one who had been an Aemilius, etc.). However, though some of his contemporaries did, there is no evidence that Octavius officially used the name Octavianus, as it would have made his modest origins too obvious. Historians usually refer to the new Caesar as "Octavian" during the time between his adoption and his assumption of the name Augustus in 27 BC in order to avoid confusing the dead dictator with his heir. Octavian could not rely on his limited funds to make a successful entry into the upper echelons of the Roman political hierarchy. After a warm welcome by Caesar's soldiers at Brundisium, Octavian demanded a portion of the funds that were allotted by Caesar for the intended war against the Parthian Empire in the Middle East. This amounted to 700 million sesterces stored at Brundisium, the staging ground in Italy for military operations in the east. A later senatorial investigation into the disappearance of the public funds took no action against Octavian since he subsequently used that money to raise troops against the Senate's arch enemy Mark Antony. Octavian made another bold move in 44 BC when, without official permission, he appropriated the annual tribute that had been sent from Rome's Near Eastern province to Italy. Octavian began to bolster his personal forces with Caesar's veteran legionaries and with troops designated for the Parthian war, gathering support by emphasizing his status as heir to Caesar. On his march to Rome through Italy, Octavian's presence and newly acquired funds attracted many, winning over Caesar's former veterans stationed in Campania. By June, he had gathered an army of 3,000 loyal veterans, paying each a bonus of 500 denarii. Growing tensions Arriving in Rome on 6 May 44 BC, Octavian found consul Mark Antony, Caesar's former colleague, in an uneasy truce with the dictator's assassins. They had been granted a general amnesty on 17 March, yet Antony had succeeded in driving most of them out of Rome with an inflammatory eulogy at Caesar's funeral, mounting public opinion against the assassins. Mark Antony was amassing political support, but Octavian still had the opportunity to rival him as the leading member of the faction supporting Caesar. Antony had lost the support of many Romans and supporters of Caesar when he initially opposed the motion to elevate Caesar to divine status. It is alleged that Antony refused to hand over the money due Octavian as Caesar's adopted heir, possibly on grounds that it would take time to disentangle it from state funds. During the summer, Octavian won the support of Caesarian veterans and also made common cause with those senators – many of whom were themselves former Caesarians – who perceived Antony as a threat to the state. After an abortive attempt by the veterans to reconcile Octavian and Antony, Antony's bellicose edicts against Brutus and Cassius alienated him from the moderate Caesarians in the senate, who feared a renewed civil war. In September, Marcus Tullius Cicero began to attack Antony in a series of speeches portraying him as a threat to the republican order. First conflict with Antony With opinion in Rome turning against him and his year of consular power nearing its end, Antony attempted to pass laws that would assign him the province of Cisalpine Gaul. Octavian meanwhile built up a private army in Italy by recruiting Caesarian veterans, and on 28 November he won over two of Antony's legions with the enticing offer of monetary gain. In the face of Octavian's large and capable force, Antony saw the danger of staying in Rome and, to the relief of the Senate, he left Rome for Cisalpine Gaul, which was to be handed to him on 1 January. However, the province had earlier been assigned to Decimus Junius Brutus Albinus, one of Caesar's assassins, who now refused to yield to Antony. Antony besieged him at Mutina and rejected the resolutions passed by the Senate to stop the fighting. The Senate had no army to enforce their resolutions. This provided an opportunity for Octavian, who already was known to have armed forces. Cicero also defended Octavian against Antony's taunts about Octavian's lack of noble lineage and aping of Julius Caesar's name, stating "we have no more brilliant example of traditional piety among our youth." At the urging of Cicero, the Senate inducted Octavian as senator on 1 January 43 BC, yet he also was given the power to vote alongside the former consuls. In addition, Octavian was granted imperium pro praetore (commanding power) which legalized his command of troops, sending him to relieve the siege along with Hirtius and Pansa (the consuls for 43 BC). He assumed the fasces on 7 January, a date that he would later commemorate as the beginning of his public career. Antony's forces were defeated at the battles of Forum Gallorum (14 April) and Mutina (21 April), forcing Antony to retreat to Transalpine Gaul. Both consuls were killed, however, leaving Octavian in sole command of their armies. The Senate heaped many more rewards on Decimus Brutus than on Octavian for defeating Antony, then attempted to give command of the consular legions to Decimus Brutus. In response, Octavian stayed in the Po Valley and refused to aid any further offensive against Antony. In July, an embassy of centurions sent by Octavian entered Rome and demanded the consulship left vacant by Hirtius and Pansa and also that the decree should be rescinded which declared Antony a public enemy. When this was refused, he marched on the city with eight legions. He encountered no military opposition in Rome and on 19 August 43 BC was elected consul with his relative Quintus Pedius as co-consul. Meanwhile, Antony formed an alliance with Marcus Aemilius Lepidus, another leading Caesarian. Second Triumvirate Proscriptions In a meeting near Bononia in October 43 BC, Octavian, Antony, and Lepidus formed the Second Triumvirate. Their powers were made official by the Senate on 27 November. This explicit arrogation of special powers lasting five years was then legalised by law passed by the plebs, unlike the unofficial First Triumvirate formed by Pompey, Julius Caesar, and Marcus Licinius Crassus. The triumvirs then set in motion proscriptions, in which between 130 and 300 senators and 2,000 equites were branded as outlaws and deprived of their property and, for those who failed to escape, their lives. This decree issued by the triumvirate was motivated in part by a need to raise money to pay the salaries of their troops for the upcoming conflict against Caesar's assassins, Marcus Junius Brutus and Gaius Cassius Longinus. Rewards for their arrest gave incentive for Romans to capture those proscribed, while the assets and properties of those arrested were seized by the triumvirs. Contemporary Roman historians provide conflicting reports as to which triumvir was most responsible for the proscriptions and killing. However, the sources agree that enacting the proscriptions was a means by all three factions to eliminate political enemies. Marcus Velleius Paterculus asserted that Octavian tried to avoid proscribing officials whereas Lepidus and Antony were to blame for initiating them. Cassius Dio defended Octavian as trying to spare as many as possible, whereas Antony and Lepidus, being older and involved in politics longer, had many more enemies to deal with. This claim was rejected by Appian, who maintained that Octavian shared an equal interest with Lepidus and Antony in eradicating his enemies. Suetonius said that Octavian was reluctant to proscribe officials but did pursue his enemies with more vigor than the other triumvirs. Plutarch described the proscriptions as a ruthless and cutthroat swapping of friends and family among Antony, Lepidus, and Octavian. For example, Octavian allowed the proscription of his ally Cicero, Antony the proscription of his maternal uncle Lucius Julius Caesar (the consul of 64 BC), and Lepidus his brother Paullus. Battle of Philippi and division of territory On 1 January 42 BC, the Senate posthumously recognized Julius Caesar as a divinity of the Roman state, divus Iulius. Octavian was able to further his cause by emphasizing the fact that he was divi filius, "Son of the Divine". Antony and Octavian then sent twenty-eight legions by sea to face the armies of Brutus and Cassius, who had built their base of power in Greece. After two battles at Philippi in Macedonia in October 42, the Caesarian army was victorious and Brutus and Cassius committed suicide. Mark Antony later used the examples of these battles as a means to belittle Octavian, as both battles were decisively won with the use of Antony's forces. In addition to claiming responsibility for both victories, Antony branded Octavian as a coward for handing over his direct military control to Marcus Vipsanius Agrippa instead. After Philippi, a new territorial arrangement was made among the members of the Second Triumvirate. Gaul and the province of Hispania were placed in the hands of Octavian. Antony traveled east to Egypt where he allied himself with Queen Cleopatra, the former lover of Julius Caesar and mother of Caesar's son Caesarion. Lepidus was left with the province of Africa, stymied by Antony, who conceded Hispania to Octavian instead. Octavian was left to decide where in Italy to settle the tens of thousands of veterans of the Macedonian campaign, whom the triumvirs had promised to discharge. The tens of thousands who had fought on the republican side with Brutus and Cassius could easily ally with a political opponent of Octavian if not appeased, and they also required land. There was no more government-controlled land to allot as settlements for their soldiers, so Octavian had to choose one of two options: alienating many Roman citizens by confiscating their land, or alienating many Roman soldiers who could mount a considerable opposition against him in the Roman heartland. Octavian chose the former. There were as many as eighteen Roman towns affected by the new settlements, with entire populations driven out or at least given partial evictions. Rebellion and marriage alliances There was widespread dissatisfaction with Octavian over these settlements of his soldiers, and this encouraged many to rally at the side of Lucius Antonius, who was brother of Mark Antony and supported by a majority in the Senate. Meanwhile, Octavian asked for a divorce from Claudia, the daughter of Fulvia (Antony's wife) and her first husband Publius Clodius Pulcher. He returned Claudia to her mother, claiming that their marriage had never been consummated. Fulvia decided to take action. Together with Lucius Antonius, she raised an army in Italy to fight for Antony's rights against Octavian. Lucius and Fulvia took a political and martial gamble in opposing Octavian however, since the Roman army still depended on the triumvirs for their salaries. Lucius and his allies ended up in a defensive siege at Perusia, where Octavian forced them into surrender in early 40 BC. Lucius and his army were spared because of his kinship with Antony, the strongman of the East, while Fulvia was exiled to Sicyon. Octavian showed no mercy, however, for the mass of allies loyal to Lucius. On 15 March, the anniversary of Julius Caesar's assassination, he had 300 Roman senators and equestrians executed for allying with Lucius. Perusia also was pillaged and burned as a warning for others. This bloody event sullied Octavian's reputation and was criticized by many, such as Augustan poet Sextus Propertius. Sextus Pompeius, the son of Pompey and still a renegade general, following Julius Caesar's victory over his father, had established himself in Sicily and Sardinia as part of an agreement reached with the Second Triumvirate in 39 BC. Both Antony and Octavian were vying for an alliance with Pompeius. Octavian succeeded in a temporary alliance in 40 BC when he married Scribonia, a sister (or daughter) of Pompeius's father-in-law Lucius Scribonius Libo. Scribonia gave birth to Octavian's only natural child, Julia, the same day that he divorced her to marry Livia Drusilla, little more than a year after their marriage. While in Egypt, Antony had been engaged in an affair with Cleopatra and had fathered three children with her. Aware of his deteriorating relationship with Octavian, Antony left Cleopatra; he sailed to Italy in 40 BC with a large force to oppose Octavian, laying siege to Brundisium. This new conflict proved untenable for both Octavian and Antony, however. Their centurions, who had become important figures politically, refused to fight because of their Caesarian cause, while the legions under their command followed suit. Meanwhile, in Sicyon, Antony's wife Fulvia died of a sudden illness while Antony was en route to meet her. Fulvia's death and the mutiny of their centurions allowed the two remaining triumvirs to effect a reconciliation. In the autumn of 40, Octavian and Antony approved the Treaty of Brundisium, by which Lepidus would remain in Africa, Antony in the East, Octavian in the West. The Italian Peninsula was left open to all for the recruitment of soldiers, but in reality this provision was useless for Antony in the East. To further cement relations of alliance with Antony, Octavian gave his sister, Octavia Minor, in marriage to Antony in late 40 BC. War with Sextus Pompeius Sextus Pompeius threatened Octavian in Italy by denying shipments of grain through the Mediterranean Sea to the peninsula. Pompeius's own son was put in charge as naval commander in the effort to cause widespread famine in Italy. Pompeius's control over the sea prompted him to take on the name Neptuni filius, "son of Neptune". A temporary peace agreement was reached in 39 BC with the Pact of Misenum; the blockade on Italy was lifted once Octavian granted Pompeius Sardinia, Corsica, Sicily, and the Peloponnese, and ensured him a future position as consul for 35 BC. The territorial agreement between the triumvirate and Sextus Pompeius began to crumble once Octavian divorced Scribonia and married Livia on 17 January 38 BC. One of Pompeius's naval commanders betrayed him and handed over Corsica and Sardinia to Octavian. Octavian lacked the resources to confront Pompeius alone, so an agreement was reached with the Second Triumvirate's extension for another five-year period beginning in 37 BC. In supporting Octavian, Antony expected to gain support for his own campaign against the Parthian Empire, desiring to avenge Rome's defeat at Carrhae in 53 BC. In an agreement reached at Tarentum, Antony provided 120 ships for Octavian to use against Pompeius, while Octavian was to send 20,000 legionaries to Antony for use against Parthia. Octavian sent only a tenth of those promised, which Antony viewed as an intentional provocation. Octavian and Lepidus launched a joint operation against Sextus in Sicily in 36 BC. Despite setbacks for Octavian, the naval fleet of Sextus Pompeius was almost entirely destroyed on 3 September by General Agrippa at the naval battle of Naulochus. Sextus fled to the east with his remaining forces, where he was captured and executed in Miletus by one of Antony's generals the following year. As Lepidus and Octavian accepted the surrender of Pompeius's troops, Lepidus attempted to claim Sicily for himself, ordering Octavian to leave. Lepidus's troops deserted him, however, and defected to Octavian since they were weary of fighting and were enticed by Octavian's promises of money. Lepidus surrendered to Octavian and was permitted to retain the office of pontifex maximus (head of the college of priests) but was ejected from the Triumvirate. His public career at an end, he effectively was exiled to a villa at Cape Circei in Italy. The Roman dominions were divided between Octavian in the West and Antony in the East. Octavian ensured Rome's citizens of their rights to property in order to maintain peace and stability in his portion of the empire. This time, he settled his discharged soldiers outside of Italy, while also returning 30,000 slaves to their former Roman owners—slaves who had fled to join Pompeius's army and navy. Octavian had the Senate grant him, his wife, and his sister tribunal immunity, or sacrosanctitas, in order to ensure his own safety and that of Livia and Octavia once he returned to Rome. War with Antony and Cleopatra Meanwhile, Antony's campaign turned disastrous against Parthia, tarnishing his image as a leader, and the mere 2,000 legionaries sent by Octavian to Antony were hardly enough to replenish his forces. On the other hand, Cleopatra could restore his army to full strength; he already was engaged in a romantic affair with her, so he decided to send Octavia back to Rome. Octavian used this to spread propaganda implying that Antony was becoming less than Roman because he rejected a legitimate Roman spouse for an "Oriental paramour". In 36 BC, Octavian used a political ploy to make himself look less autocratic and Antony more the villain by proclaiming that the civil wars were coming to an end and that he would step down as triumvir—if only Antony would do the same. Antony refused. Roman troops captured the Kingdom of Armenia in 34 BC, and Antony made his son Alexander Helios the ruler of Armenia. He also awarded the title "Queen of Kings" to Cleopatra, acts that Octavian used to convince the Roman Senate that Antony had ambitions to diminish the preeminence of Rome. Octavian became consul once again on 1 January 33 BC, and he opened the following session in the Senate with a vehement attack on Antony's grants of titles and territories to his relatives and to his queen. The breach between Antony and Octavian prompted a large portion of the senators, as well as both of that year's consuls, to leave Rome and defect to Antony. However, Octavian received two key deserters from Antony in the autumn of 32 BC: Munatius Plancus and Marcus Titius. These defectors gave Octavian the information that he needed to confirm with the Senate all the accusations that he made against Antony. Octavian forcibly entered the temple of the Vestal Virgins and seized Antony's secret will, which he promptly publicized. The will would have given away Roman-conquered territories as kingdoms for his sons to rule and designated Alexandria as the site for a tomb for him and his queen. In late 32 BC, the Senate officially revoked Antony's powers as consul and declared war on Cleopatra's regime in Egypt. In early 31 BC, Antony and Cleopatra were temporarily stationed in Greece when Octavian gained a preliminary victory: the navy successfully ferried troops across the Adriatic Sea under the command of Agrippa. Agrippa cut off Antony and Cleopatra's main force from their supply routes at sea, while Octavian landed on the mainland opposite the island of Corcyra (modern Corfu) and marched south. Trapped on land and sea, deserters of Antony's army fled to Octavian's side daily while Octavian's forces were comfortable enough to make preparations. Antony's fleet sailed through the bay of Actium on the western coast of Greece in a desperate attempt to break free of the naval blockade. It was there that Antony's fleet faced the much larger fleet of smaller, more maneuverable ships under commanders Agrippa and Gaius Sosius in the Battle of Actium on 2 September 31 BC. Antony and his remaining forces were spared by a last-ditch effort from Cleopatra's fleet that had been waiting nearby. Octavian pursued them and defeated their forces in Alexandria on 1 August 30 BC—after which Antony and Cleopatra committed suicide. Antony fell on his own sword and was taken by his soldiers back to Alexandria where he died in Cleopatra's arms. Cleopatra died soon after, reputedly by the venomous bite of an asp or by poison. Octavian had exploited his position as Caesar's heir to further his own political career, and he was well aware of the dangers in allowing another person to do the same. He therefore followed the advice of the Greek philosopher Arius Didymus that "two Caesars are one too many", ordering Caesarion killed while sparing Cleopatra's children by Antony, with the exception of Antony's older son. Octavian had previously shown little mercy to surrendered enemies and acted in ways that had proven unpopular with the Roman people, yet he was given credit for pardoning many of his opponents after the Battle of Actium. Sole ruler of Rome After Actium and the defeat of Antony and Cleopatra, Octavian was in a position to rule the entire republic under an unofficial principate—but he had to achieve this through incremental power gains. He did so by courting the Senate and the people while upholding the republican traditions of Rome, appearing that he was not aspiring to dictatorship or monarchy. Marching into Rome, Octavian and Agrippa were elected as consuls by the Senate. Years of civil war had left Rome in a state of near lawlessness, but the republic was not prepared to accept the control of Octavian as a despot. At the same time, Octavian could not give up his authority without risking further civil wars among the Roman generals, and even if he desired no position of authority his position demanded that he look to the well-being of the city of Rome and the Roman provinces. Octavian's aims from this point forward were to return Rome to a state of stability, traditional legality, and civility by lifting the overt political pressure imposed on the courts of law and ensuring free elections—in name at least. First settlement On 13 January 27 BC, Octavian made a show of returning full power to the Roman Senate and relinquishing his control of the Roman provinces and their armies. Under his consulship, however, the Senate had little power in initiating legislation by introducing bills for senatorial debate. Octavian was no longer in direct control of the provinces and their armies, but he retained the loyalty of active duty soldiers and veterans alike. The careers of many clients and adherents depended on his patronage, as his financial power was unrivaled in the Roman Republic. Historian Werner Eck states: To a large extent, the public was aware of the vast financial resources that Octavian commanded. He failed to encourage enough senators to finance the building and maintenance of networks of roads in Italy in 20 BC, but he undertook direct responsibility for them. This was publicized on the Roman currency issued in 16 BC, after he donated vast amounts of money to the aerarium Saturni, the public treasury. According to historian H. H. Scullard, however, Octavian's power was based on the exercise of "a predominant military power and ... the ultimate sanction of his authority was force, however much the fact was disguised." The Senate proposed to Octavian, the victor of Rome's civil wars, that he once again assume command of the provinces. The Senate's proposal was a ratification of Octavian's extra-constitutional power. Through the Senate, Octavian was able to continue the appearance of a still-functional constitution. Feigning reluctance, he accepted a ten-year responsibility of overseeing provinces that were considered chaotic. The provinces ceded to Augustus for that ten-year period comprised much of the conquered Roman world, including all of Hispania and Gaul, Syria, Cilicia, Cyprus, and Egypt. Moreover, command of these provinces provided Octavian with control over the majority of Rome's legions. While Octavian acted as consul in Rome, he dispatched senators to the provinces under his command as his representatives to manage provincial affairs and ensure that his orders were carried out. The provinces not under Octavian's control were overseen by governors chosen by the Roman Senate. Octavian became the most powerful political figure in the city of Rome and in most of its provinces, but he did not have a monopoly on political and martial power. The Senate still controlled North Africa, an important regional producer of grain, as well as Illyria and Macedonia, two strategic regions with several legions. However, the Senate had control of only five or six legions distributed among three senatorial proconsuls, compared to the twenty legions under the control of Octavian, and their control of these regions did not amount to any political or military challenge to Octavian. The Senate's control over some of the Roman provinces helped maintain a republican facade for the autocratic principate. Also, Octavian's control of entire provinces followed republican-era precedents for the objective of securing peace and creating stability, in which such prominent Romans as Pompey had been granted similar military powers in times of crisis and instability. Change to Augustus On 16 January 27 BC the Senate gave Octavian the new title of augustus. Augustus is from the Latin word augere (meaning "to increase") and can be translated as "illustrious one" or "sublime". It was a title of religious authority rather than political one, and it indicated that Octavian now approached divinity. His name of Augustus was also more favorable than Romulus, the previous one which he styled for himself in reference to the story of the legendary founder of Rome, which symbolized a second founding of Rome. The title of Romulus was associated too strongly with notions of monarchy and kingship, an image that Octavian tried to avoid. The Senate also confirmed his position as princeps senatus, which originally meant the member of the Senate with the highest precedence, but in this case it became an almost regnal title for a leader who was first in charge. The honorific augustus was inherited by all future emperors and became the de facto main title of the emperor. As a result, modern historians usually regard this event as the beginning of his reign as "emperor". Augustus himself appears to have reckoned his "reign" from 27 BC. Augustus styled himself as Imperator Caesar divi filius, "Commander Caesar son of the deified one". With this title, he boasted his familial link to deified Julius Caesar, and the use of imperator signified a permanent link to the Roman tradition of victory. He transformed Caesar, a cognomen for one branch of the Julian family, into a new family line that began with him. Augustus was granted the right to hang the corona civica (civic crown) above his door and to have laurels drape his doorposts. However, he renounced flaunting insignia of power such as holding a scepter, wearing a diadem, or wearing the golden crown and purple toga of his predecessor Julius Caesar. If he refused to symbolize his power by donning and bearing these items on his person, the Senate nonetheless awarded him with a golden shield displayed in the meeting hall of the Curia, bearing the inscription virtus, pietas, clementia, iustitia—"valor, piety, clemency, and justice." Second settlement By 23 BC, some of the un-republican implications were becoming apparent concerning the settlement of 27 BC. Augustus's retention of an annual consulate drew attention to his de facto dominance over the Roman political system and cut in half the opportunities for others to achieve what was still nominally the preeminent position in the Roman state. Further, he was causing political problems by desiring to have his nephew Marcus Claudius Marcellus follow in his footsteps and eventually assume the principate in his turn, alienating his three greatest supporters: Agrippa, Maecenas, and Livia. He appointed noted republican Calpurnius Piso (who had fought against Julius Caesar and supported Cassius and Brutus) as co-consul in 23 BC, after his choice Aulus Terentius Varro Murena died unexpectedly. In the late spring Augustus had a severe illness and on his supposed deathbed made arrangements that would ensure the continuation of the principate in some form, while allaying senators' suspicions of his anti-republicanism. Augustus prepared to hand down his signet ring to his favored general Agrippa. However, Augustus handed over to his co-consul Piso all of his official documents, an account of public finances, and authority over listed troops in the provinces while Augustus's supposedly favored nephew Marcellus came away empty-handed. This was a surprise to many who believed Augustus would have named an heir to his position as an unofficial emperor. Augustus bestowed only properties and possessions to his designated heirs, as an obvious system of institutionalized imperial inheritance would have provoked resistance and hostility among the republican-minded Romans fearful of monarchy. With regards to the principate, it was obvious to Augustus that Marcellus was not ready to take on his position; nonetheless, by giving his signet ring to Agrippa, Augustus intended to signal to the legions that Agrippa was to be his successor and that they should continue to obey Agrippa, constitutional procedure notwithstanding. Soon after his bout of illness subsided, Augustus gave up his consulship. The only other times Augustus would serve as consul would be in the years 5 and 2 BC, both times to introduce his grandsons into public life. This was a clever ploy by Augustus; ceasing to serve as one of two annually elected consuls allowed aspiring senators a better chance to attain the consular position while allowing Augustus to exercise wider patronage within the senatorial class. Although Augustus had resigned as consul, he desired to retain his consular imperium not just in his provinces but throughout the empire. This desire, as well as the Marcus Primus affair, led to a second compromise between him and the Senate known as the second settlement. The primary reasons for the second settlement were as follows. First, after Augustus relinquished the annual consulship, he was no longer in an official position to rule the state, yet his dominant position remained unchanged over his Roman, 'imperial' provinces where he was still a proconsul. When he annually held the office of consul, he had the power to intervene with the affairs of the other provincial proconsuls appointed by the Senate throughout the empire, when he deemed necessary. A second problem later arose showing the need for the second settlement in what became known as the "Marcus Primus affair". In late 24 or early 23 BC, charges were brought against Marcus Primus, the former proconsul (governor) of Macedonia, for waging a war without prior approval of the Senate on the Odrysian kingdom of Thrace, whose king was a Roman ally. He was defended by Lucius Licinius Varro Murena who told the trial that his client had received specific instructions from Augustus ordering him to attack the client state. Later, Primus testified that the orders came from the recently deceased Marcellus. Such orders, had they been given, would have been considered a breach of the Senate's prerogative under the constitutional settlement of 27 BC and its aftermath—i.e., before Augustus was granted imperium proconsulare maius—as Macedonia was a senatorial province under the Senate's jurisdiction, not an imperial province under the authority of Augustus. Such an action would have ripped away the veneer of republican restoration as promoted by Augustus, and exposed his fraud of merely being the first citizen, a first among equals. Even worse, the involvement of Marcellus provided some measure of proof that Augustus's policy was to have the youth take his place as princeps, instituting a form of monarchy – accusations that had already played out. The situation was so serious that Augustus appeared at the trial even though he had not been called as a witness. Under oath, Augustus declared that he gave no such order. Murena disbelieved Augustus's testimony and resented his attempt to subvert the trial by using his auctoritas. He rudely demanded to know why Augustus had turned up to a trial to which he had not been called; Augustus replied that he came in the public interest. Although Primus was found guilty, some jurors voted to acquit, meaning that not everybody believed Augustus's testimony, an insult to the 'August One'. The second settlement was completed in part to allay confusion and formalize Augustus's legal authority to intervene in senatorial provinces. The Senate granted Augustus a form of general imperium proconsulare, or proconsular imperium (power) that applied throughout the empire, not solely to his provinces. Moreover, the Senate augmented Augustus's proconsular imperium into imperium proconsulare maius, or proconsular imperium applicable throughout the empire that was more (maius) or greater than that held by the other proconsuls. This in effect gave Augustus constitutional power superior to all other proconsuls in the empire. Augustus stayed in Rome during the renewal process and provided veterans with lavish donations to gain their support, thereby ensuring that his status of proconsular imperium maius was renewed in 13 BC. Additional powers During the second settlement, Augustus was also granted the power of a tribune (tribunicia potestas) for life, though not the official title of tribune. For some years, Augustus had been awarded tribunicia sacrosanctitas, the immunity given to a tribune of the plebs. Now he decided to assume the full powers of the magistracy, renewed annually, in perpetuity. Legally, it was closed to patricians, a status that Augustus had acquired some years earlier when adopted by Julius Caesar. This power allowed him to convene the Senate and people at will and lay business before them, to veto the actions of either the Assembly or the Senate, to preside over elections, and to speak first at any meeting. Also included in Augustus's tribunician authority were powers usually reserved for the Roman censor; these included the right to supervise public morals and scrutinize laws to ensure that they were in the public interest, as well as the ability to hold a census and determine the membership of the Senate. With the powers of a censor, Augustus appealed to virtues of Roman patriotism by banning all attire but the classic toga while entering the Forum. There was no precedent within the Roman system for combining the powers of the tribune and the censor into a single position, nor was Augustus ever elected to the office of censor. Julius Caesar had been granted similar powers, wherein he was charged with supervising the morals of the state. However, this position did not extend to the censor's ability to hold a census and determine the Senate's roster. The office of the tribunus plebis began to lose its prestige due to Augustus's amassing of tribunal powers, so he revived its importance by making it a mandatory appointment for any plebeian desiring the praetorship. Augustus was granted sole imperium within the city of Rome in addition to being granted proconsular imperium maius and tribunician authority for life. Traditionally, proconsuls (Roman province governors) lost their proconsular "imperium" when they crossed the Pomerium—the sacred boundary of Rome—and entered the city. In these situations, Augustus would have power as part of his tribunician authority, but his constitutional imperium within the Pomerium would be less than that of a serving consul, which meant that when he was in the city he might not be the constitutional magistrate with the most authority. Thanks to his prestige or auctoritas, his wishes would usually be obeyed, but there might be some difficulty. To fill this power vacuum, the Senate voted that Augustus's imperium proconsulare maius (superior proconsular power) should not lapse when he was inside the city walls. All armed forces in the city had formerly been under the control of the urban praetors and consuls, but this situation now placed them under the sole authority of Augustus. In addition, the credit was given to Augustus for each subsequent Roman military victory after this time, because the majority of Rome's armies were stationed in imperial provinces commanded by Augustus through the legatus who were deputies of the princeps in the provinces. Moreover, if a battle was fought in a senatorial province, Augustus's proconsular imperium maius allowed him to take command of (or credit for) any major military victory. This meant that Augustus was the only individual able to receive a triumph, a tradition that began with Romulus, Rome's first king and first triumphant general. Tiberius, Augustus's eldest stepson by Livia, was the only other general to receive a triumph—for victories in Germania in 7 BC. Normally during republican times, the powers Augustus held even after the second settlement would have been split between several people, who would each exercise them with the assistance of a colleague and for a specific period of time. Augustus held them all at once by himself and with no time limits; even those that nominally had time limits were automatically renewed whenever they lapsed. Conspiracy Many of the political subtleties of the second settlement seem to have evaded the comprehension of the plebeian class, who were Augustus's greatest supporters and clientele. This caused them to insist upon Augustus's participation in imperial affairs from time to time. Augustus failed to stand for election as consul in 22 BC, and fears arose once again that he was being forced from power by the aristocratic Senate. In 22, 21, and 19 BC, the people rioted in response and only allowed a single consul to be elected for each of those years, ostensibly to leave the other position open for Augustus. Likewise, there was a food shortage in Rome in 22 BC which sparked panic, while many urban plebs called for Augustus to take on dictatorial powers to personally oversee the crisis. After a theatrical display of refusal before the Senate, Augustus finally accepted authority over Rome's grain supply "by virtue of his proconsular imperium", and ended the crisis almost immediately. It was not until AD 8 that a food crisis of this sort prompted Augustus to establish a praefectus annonae, a permanent prefect who was in charge of procuring food supplies for Rome. There were some who were concerned by the expansion of powers granted to Augustus by the second settlement, and this came to a head with the apparent conspiracy of Fannius Caepio. Some time prior to 1 September 22 BC, a certain Castricius provided Augustus with information about a conspiracy led by Fannius Caepio. Murena, the outspoken consul who defended Primus in the Marcus Primus affair, was named among the conspirators. The conspirators were tried in absentia with Tiberius acting as prosecutor; the jury found them guilty, but it was not a unanimous verdict. All the accused were sentenced to death for treason and executed as soon as they were captured—without ever giving testimony in their defence. Augustus ensured that the façade of Republican government continued with an effective cover-up of the events. In 19 BC, the Senate granted Augustus a form of "general consular imperium", which was probably imperium consulare maius, like the proconsular powers that he received in 23 BC. Like his tribune authority, the consular powers were another instance of gaining power from offices that he did not actually hold. In addition, Augustus was allowed to wear the consul's insignia in public and before the Senate, as well as to sit in the symbolic chair between the two consuls and hold the fasces, an emblem of consular authority. This seems to have assuaged the populace; regardless of whether or not Augustus was a consul, the importance was that he both appeared as one before the people and could exercise consular power if necessary. On 6 March 12 BC, after the death of Lepidus, he additionally took up the position of pontifex maximus, the high priest of the college of the pontiffs, the most important position in Roman religion. On 5 February 2 BC, Augustus was also given the title pater patriae, or "father of the country". Stability and staying power A final reason for the second settlement was to give the principate constitutional stability and staying power in case something happened to Princeps Augustus. His illness of early 23 BC and the Caepio conspiracy showed that the regime's existence hung by the thin thread of the life of one man, Augustus himself, who had several severe and dangerous illnesses throughout his life. If he were to die from natural causes or fall victim to assassination, Rome could be subjected to another round of civil war. The memories of Pharsalus, the Ides of March, the proscriptions, Philippi, and Actium, barely twenty-five years distant, were still vivid in the minds of many citizens. Proconsular imperium was conferred upon Agrippa for five years, similar to Augustus's power, in order to accomplish this constitutional stability. The exact nature of the grant is uncertain but it probably covered Augustus's imperial provinces, east and west, perhaps lacking authority over the provinces of the Senate. That came later, as did the jealously guarded tribunicia potestas. Augustus's accumulation of powers was now complete. War and expansion By AD 13, Augustus boasted 21 occasions where his troops proclaimed "imperator" ("victorious commander") as his title after a successful battle. Almost the entire fourth chapter in his publicly released memoirs of achievements known as the Res Gestae is devoted to his military victories and honors. Augustus also promoted the ideal of a superior Roman civilization with a task of ruling the world (to the extent to which the Romans knew it), a sentiment embodied in words that the contemporary poet Virgil attributes to a legendary ancestor of Augustus: tu regere imperio populos, Romane, memento—"Roman, remember to rule the Earth's peoples with authority!" The impulse for expansionism was apparently prominent among all classes at Rome, and it is accorded divine sanction by Virgil's Jupiter in Book 1 of the Aeneid, where Jupiter promises Rome imperium sine fine, "sovereignty without end". By the end of his reign, the armies of Augustus had conquered northern Hispania (modern Spain and Portugal) and the Alpine regions of Raetia and Noricum (modern Switzerland, Bavaria, Austria, Slovenia), Illyricum and Pannonia (modern Albania, Croatia, Hungary, Serbia, etc.), and had extended the borders of Africa Proconsularis to the east and south. Judea was added to the province of Syria when Augustus deposed Herod Archelaus, successor to client king Herod the Great. Syria (like Egypt after Antony) was governed by a high prefect of the equestrian class rather than by a proconsul or legate of Augustus. Again, no military effort was needed in 25 BC when Galatia (part of modern Turkey) was converted to a Roman province shortly after Amyntas of Galatia was killed by an avenging widow of a slain prince from Homonada. The rebellious tribes of Asturias and Cantabria in modern-day Spain were finally quelled in 19 BC, and the territory fell under the provinces of Hispania and Lusitania. This region proved to be a major asset in funding Augustus's future military campaigns, as it was rich in mineral deposits that could be fostered in Roman mining projects, especially the very rich gold deposits at Las Médulas. Conquering the peoples of the Alps in 16 BC was another important victory for Rome, since it provided a large territorial buffer between the Roman citizens of Italy and Rome's enemies in Germania to the north. Horace dedicated an ode to the victory, while the monumental Trophy of Augustus near Monaco was built to honor the occasion. The capture of the Alpine region also served the next offensive in 12 BC, when Tiberius began the offensive against the Pannonian tribes of Illyricum, and his brother Nero Claudius Drusus moved against the Germanic tribes of the eastern Rhineland. Both campaigns were successful, as Drusus's forces reached the Elbe River by 9 BC—though he died shortly after by falling off his horse. It was recorded that the pious Tiberius walked in front of his brother's body all the way back to Rome. To protect Rome's eastern territories from the Parthian Empire, Augustus relied on the client states of the east to act as territorial buffers and areas that could raise their own troops for defense. To ensure security of the empire's eastern flank, Augustus stationed a Roman army in Syria, while his skilled stepson Tiberius negotiated with the Parthians as Rome's diplomat to the East. Tiberius was responsible for restoring Tigranes V to the throne of the Kingdom of Armenia. Arguably his greatest diplomatic achievement was negotiating with Phraates IV of Parthia (37–2 BC) in 20 BC for the return of the battle standards lost by Crassus in the Battle of Carrhae, a symbolic victory and great boost of morale for Rome. Werner Eck claims that this was a great disappointment for Romans seeking to avenge Crassus's defeat by military means. However, Maria Brosius explains that Augustus used the return of the standards as propaganda symbolizing the submission of Parthia to Rome. The event was celebrated in art such as the breastplate design on the statue Augustus of Prima Porta and in monuments such as the Temple of Mars Ultor ('Mars the Avenger') built to house the standards. Parthia had always posed a threat to Rome in the east, but the real battlefront was along the Rhine and Danube rivers. Before the final fight with Antony, Octavian's campaigns against the tribes in Dalmatia were the first step in expanding Roman dominions to the Danube. Victory in battle was not always a permanent success, as newly conquered territories were constantly retaken by Rome's enemies in Germania. A prime example of Roman loss in battle was the Battle of the Teutoburg Forest in AD 9, where three entire legions led by Publius Quinctilius Varus were destroyed by Arminius, leader of the Cherusci, an apparent Roman ally. Augustus retaliated by dispatching Tiberius and Drusus to the Rhineland to pacify it, which had some success although the battle brought the end to Roman expansion into Germany. The Roman general Germanicus took advantage of a Cherusci civil war between Arminius and Segestes; at the Battle of Idistaviso in AD 16, he defeated Arminius. Death and succession The illness of Augustus in 23 BC brought the problem of succession to the forefront of political issues and the public. To ensure stability, he needed to designate an heir to his unique position in Roman society and government. This was to be achieved in small, undramatic and incremental ways that did not stir senatorial fears of monarchy. If someone was to succeed to Augustus's unofficial position of power, he would have to earn it through his own publicly proven merits. Some Augustan historians argue that indications pointed toward his sister's son Marcellus, who had been quickly married to Augustus's daughter Julia the Elder. Other historians dispute this since Augustus's will was read aloud to the Senate while he was seriously ill in 23 BC, indicating a preference for Marcus Agrippa, who was Augustus's second in charge and arguably the only one of his associates who could have controlled the legions and held the empire together. After the death of Marcellus in 23 BC, Augustus married his daughter to Agrippa. This union produced five children, three sons and two daughters: Gaius Caesar, Lucius Caesar, Vipsania Julia, Agrippina, and Agrippa Postumus, so named because he was born after Marcus Agrippa died. Shortly after the second settlement, Agrippa was granted a five-year term of administering the eastern half of the empire with the imperium of a proconsul and the same tribunicia potestas granted to Augustus (although not trumping Augustus's authority), his seat of governance stationed at Samos in the eastern Aegean. This granting of power showed Augustus's favor for Agrippa, but it was also a measure to please members of his Caesarian party by allowing one of their members to share a considerable amount of power with him. Augustus's intent became apparent to make his grandsons Gaius and Lucius his heirs when he adopted them as his own children. He took the consulship in 5 and 2 BC so that he could personally usher them into their political careers, and they were nominated for the consulships of AD 1 and 4. Augustus also showed favor to his stepsons, Livia's children from her first marriage, Nero Claudius Drusus Germanicus (henceforth referred to as Drusus) and Tiberius Claudius (henceforth Tiberius), granting them military commands and public office, though seeming to favor Drusus. After Agrippa died in 12 BC, Tiberius was ordered to divorce his own wife, Vipsania Agrippina, and marry Augustus's widowed daughter, Julia, as soon as a period of mourning for Agrippa had ended. Drusus's marriage to Augustus's niece Antonia was considered an unbreakable affair, whereas Vipsania was "only" the daughter of the late Agrippa from his first marriage. Tiberius shared in Augustus's tribune powers as of 6 BC but shortly thereafter went into retirement, reportedly wanting no further role in politics while he exiled himself to Rhodes. No specific reason is known for his departure, though it could have been a combination of reasons, including a failing marriage with Julia as well as a sense of envy and exclusion over Augustus's apparent favouring of the younger Gaius and Lucius. (Gaius and Lucius joined the college of priests at an early age, were presented to spectators in a more favorable light, and were introduced to the army in Gaul.) After the deaths of both Lucius and Gaius in AD 2 and 4 respectively, and the earlier death of his brother Drusus (9 BC), Tiberius was recalled to Rome in June AD 4, where he was adopted by Augustus on the condition that he, in turn, adopt his nephew Germanicus. This continued the tradition of presenting at least two generations of heirs. In that year, Tiberius was also granted the powers of a tribune and proconsul, emissaries from foreign kings had to pay their respects to him and by AD 13 was awarded with his second triumph and equal level of imperium with that of Augustus. The only other possible claimant as heir was Agrippa Postumus, who had been exiled by Augustus in AD 7, his banishment made permanent by senatorial decree, and Augustus officially disowned him. He certainly fell out of Augustus's favor as an heir; the historian Erich S. Gruen notes various contemporary sources that state Agrippa Postumus was a "vulgar young man, brutal and brutish, and of depraved character". On 19 August AD 14, Augustus died while visiting Nola where his father had died. Both Tacitus and Cassius Dio wrote that Livia was rumored to have brought about Augustus's death by poisoning fresh figs. This element features in many modern works of historical fiction pertaining to Augustus's life, but some historians view it as likely to have been a salacious fabrication made by those who had favoured Postumus as heir, or other of Tiberius's political enemies. Livia had long been the target of similar rumors of poisoning on the behalf of her son, most or all of which are unlikely to have been true. Alternatively, it is possible that Livia did supply a poisoned fig (she did cultivate a variety of fig named for her that Augustus is said to have enjoyed), but did so as a means of assisted suicide rather than murder. Augustus's health had been in decline in the months immediately before his death, and he had made significant preparations for a smooth transition in power, having at last reluctantly settled on Tiberius as his choice of heir. It is likely that Augustus was not expected to return alive from Nola, but it seems that his health improved once there; it has therefore been speculated that Augustus and Livia conspired to end his life at the anticipated time, having committed all political process to accepting Tiberius, in order to not endanger that transition. Augustus's famous last words were, "Have I played the part well? Then applaud as I exit" ()—referring to the play-acting and regal authority that he had put on as emperor. An enormous funerary procession of mourners traveled with Augustus's body from Nola to Rome, and all public and private businesses closed on the day of his burial. Tiberius and his son Drusus delivered the eulogy while standing atop two rostra. Augustus's body was coffin-bound and cremated on a pyre close to his mausoleum. It was proclaimed that Augustus joined the company of the gods as a member of the Roman pantheon. Historian D. C. A. Shotter states that Augustus's policy of favoring the Julian family line over the Claudian might have afforded Tiberius sufficient cause to show open disdain for Augustus after the latter's death; instead, Tiberius was always quick to rebuke those who criticized Augustus. Shotter suggests that Augustus's deification obliged Tiberius to suppress any open resentment that he might have harbored, coupled with Tiberius's "extremely conservative" attitude towards religion. Also, historian R. Shaw-Smith points to letters of Augustus to Tiberius which display affection towards Tiberius and high regard for his military merits. Shotter states that Tiberius focused his anger and criticism on Gaius Asinius Gallus (for marrying Vipsania after Augustus forced Tiberius to divorce her), as well as toward the two young Caesars, Gaius and Lucius—instead of Augustus, the real architect of his divorce and imperial demotion. Legacy Augustus created a regime which maintained peace and prosperity in the Roman west and the Greek east for two centuries. Its dominance also laid the foundations of a concept of universal empire in the Byzantine Empire and the Holy Roman Empires down to their dissolutions in 1453 and 1806, respectively. Both his adoptive surname, Caesar, and his title Augustus became the permanent titles of the rulers of the Roman Empire for fourteen centuries after his death, in use both at Old Rome and at New Rome. In many languages, Caesar became the word for emperor, as in the German Kaiser and in the Bulgarian and subsequently Russian Tsar (sometimes Csar or Czar). The cult of Divus Augustus continued until the state religion of the empire was changed to Christianity in 391 by Theodosius I. Consequently, there are many statues and busts of the first emperor. He had composed an account of his achievements, the Res Gestae Divi Augusti, to be inscribed in bronze in front of his mausoleum. Copies of the text were inscribed throughout the empire upon his death. The inscriptions in Latin featured translations in Greek beside it and were inscribed on many public edifices, such as the temple in Ankara dubbed the Monumentum Ancyranum, called the "queen of inscriptions" by historian Theodor Mommsen. The Res Gestae is the only work to have survived from antiquity, though Augustus is also known to have composed poems entitled Sicily, Epiphanus, and Ajax, an autobiography of 13 books, a philosophical treatise, and a written rebuttal to Brutus's Eulogy of Cato. Historians are able to analyze excerpts of letters penned by Augustus, preserved in other works, to others for additional facts or clues about his personal life. Many consider Augustus to be Rome's greatest emperor; his policies certainly extended the empire's life span and initiated the celebrated Pax Romana or Pax Augusta. The Roman Senate wished subsequent emperors to "be more fortunate than Augustus and better than Trajan". Augustus was intelligent, decisive, and a shrewd politician, but he was not perhaps as charismatic as Julius Caesar and was influenced on occasion by Livia (sometimes for the worse). Nevertheless, his legacy proved more enduring. The city of Rome was utterly transformed under Augustus, with Rome's first institutionalized police force, firefighting force, and the establishment of the municipal prefect as a permanent office. The police force was divided into cohorts of 500 men each, while the units of firemen ranged from 500 to 1,000 men each, with 7 units assigned to 14 divided city sectors. A praefectus vigilum, or "Prefect of the Watch" was put in charge of the vigiles, Rome's fire brigade and police. With Rome's civil wars at an end, Augustus was also able to create a standing army for the Roman Empire, fixed at a size of 28 legions of about 170,000 soldiers. This was supported by numerous auxiliary units of 500 non-citizen soldiers each, often recruited from recently conquered areas. With his finances securing the maintenance of roads throughout Italy, Augustus installed an official courier system of relay stations overseen by a military officer known as the praefectus vehiculorum. Besides the advent of swifter communication among Italian polities, his extensive building of roads throughout Italy also allowed Rome's armies to march swiftly and at an unprecedented pace across the country. In the year 6 Augustus established the aerarium militare, donating 170 million sesterces to the new military treasury that provided for both active and retired soldiers. One of the most enduring institutions of Augustus was the establishment of the Praetorian Guard in 27 BC, originally a personal bodyguard unit on the battlefield that evolved into an imperial guard as well as an important political force in Rome. They had the power to intimidate the Senate, install new emperors, and depose ones they disliked; the last emperor they served was Maxentius, as it was Constantine I who disbanded them in the early 4th century and destroyed their barracks, the Castra Praetoria. Although the most powerful individual in the Roman Empire, Augustus wished to embody the spirit of Republican virtue and norms. He also wanted to relate to and connect with the concerns of the plebs and lay people. He achieved this through various means of generosity and a cutting back of lavish excess. In the year 29 BC, Augustus gave 400 sesterces (equal to 1/10 of a Roman pound of gold) each to 250,000 citizens, 1,000 sesterces each to 120,000 veterans in the colonies, and spent 700 million sesterces in purchasing land for his soldiers to settle upon. He also restored 82 different temples to display his care for the Roman pantheon of deities. In 28 BC, he melted down 80 silver statues erected in his likeness and in honor of him, an attempt of his to appear frugal and modest. The longevity of Augustus's reign and its legacy to the Roman world should not be overlooked as a key factor in its success. As Tacitus wrote, the younger generations alive in AD 14 had never known any form of government other than the principate. Had Augustus died earlier, matters might have turned out differently. The attrition of the civil wars on the old Republican oligarchy and the longevity of Augustus, therefore, must be seen as major contributing factors in the transformation of the Roman state into a de facto monarchy in these years. Augustus's own experience, his patience, his tact, and his political acumen also played their parts. He directed the future of the empire down many lasting paths, from the existence of a standing professional army stationed at or near the frontiers, to the dynastic principle so often employed in the imperial succession, to the embellishment of the capital at the emperor's expense. Augustus's ultimate legacy was the peace and prosperity the Empire enjoyed for the next two centuries under the system he initiated. His memory was enshrined in the political ethos of the Imperial age as a paradigm of the good emperor. Every emperor of Rome adopted his name, Caesar Augustus, which gradually lost its character as a name and eventually became a title. The Augustan era poets Virgil and Horace praised Augustus as a defender of Rome, an upholder of moral justice, and an individual who bore the brunt of responsibility in maintaining the empire. However, for his rule of Rome and establishing the principate, Augustus has also been subjected to criticism throughout the ages. The contemporary Roman jurist Marcus Antistius Labeo, fond of the days of pre-Augustan republican liberty in which he had been born, openly criticized the Augustan regime. In the beginning of his Annals, Tacitus wrote that Augustus had cunningly subverted Republican Rome into a position of slavery. He continued to say that, with Augustus's death and swearing of loyalty to Tiberius, the people of Rome traded one slaveholder for another. Tacitus, however, records two contradictory but common views of Augustus: According to the second opposing opinion: In a 2006 biography on Augustus, Anthony Everitt asserts that through the centuries, judgments on Augustus's reign have oscillated between these two extremes but stresses that: Tacitus was of the belief that Nerva (r. 96–98) successfully "mingled two formerly alien ideas, principate and liberty". The 3rd-century historian Cassius Dio acknowledged Augustus as a benign, moderate ruler, yet like most other historians after the death of Augustus, Dio viewed Augustus as an autocrat. The poet Marcus Annaeus Lucanus (AD 39–65) was of the opinion that Caesar's victory over Pompey and the fall of Cato the Younger (95 BC–46 BC) marked the end of traditional liberty in Rome; historian Chester Starr writes of his avoidance of criticizing Augustus, "perhaps Augustus was too sacred a figure to accuse directly." The Anglo-Irish writer Jonathan Swift (1667–1745), in his Discourse on the Contests and Dissentions in Athens and Rome, criticized Augustus for installing tyranny over Rome, and likened what he believed Great Britain's virtuous constitutional monarchy to Rome's moral Republic of the 2nd century BC. In his criticism of Augustus, the admiral and historian Thomas Gordon (1658–1741) compared Augustus to the puritanical tyrant Oliver Cromwell (1599–1658). Thomas Gordon and the French political philosopher Montesquieu (1689–1755) both remarked that Augustus was a coward in battle. In his Memoirs of the Court of Augustus, the Scottish scholar Thomas Blackwell (1701–1757) deemed Augustus a Machiavellian ruler, "a bloodthirsty vindicative usurper", "wicked and worthless", "a mean spirit", and a "tyrant". Revenue reforms Augustus's public revenue reforms had a great impact on the subsequent success of the Empire. Augustus brought a far greater portion of the Empire's expanded land base under consistent, direct taxation from Rome, instead of exacting varying, intermittent, and somewhat arbitrary tributes from each local province as Augustus's predecessors had done. This reform greatly increased Rome's net revenue from its territorial acquisitions, stabilized its flow, and regularized the financial relationship between Rome and the provinces, rather than provoking fresh resentments with each new arbitrary exaction of tribute. The measures of taxation in the reign of Augustus were determined by population census, with fixed quotas for each province. Citizens of Rome and Italy paid indirect taxes, while direct taxes were exacted from the provinces. Indirect taxes included a 4% tax on the price of slaves, a 1% tax on goods sold at auction, and a 5% tax on the inheritance of estates valued at over 100,000 sesterces by persons other than the next of kin. An equally important reform was the abolition of private tax farming, which was replaced by salaried civil service tax collectors. Private contractors who collected taxes for the State were the norm in the Republican era. Some of them were powerful enough to influence the number of votes for men running for offices in Rome. These tax farmers called publicans were infamous for their depredations, great private wealth, and the right to tax local areas. The use of Egypt's immense land rents to finance the Empire's operations resulted from Augustus's conquest of Egypt and the shift to a Roman form of government. As it was effectively considered Augustus's private property rather than a province of the Empire, it became part of each succeeding emperor's patrimonium. Instead of a legate or proconsul, Augustus installed a prefect from the equestrian class to administer Egypt and maintain its lucrative seaports; this position became the highest political achievement for any equestrian besides becoming Prefect of the Praetorian Guard. The highly productive agricultural land of Egypt yielded enormous revenues that were available to Augustus and his successors to pay for public works and military expeditions. Month of August The month of August (Latin: Augustus) is named after Augustus; until his time it was called Sextilis (named so because it had been the sixth month of the original Roman calendar and the Latin word for six is sex). Commonly repeated lore has it that August has 31 days because Augustus wanted his month to match the length of Julius Caesar's July, but this is an invention of the 13th century scholar Johannes de Sacrobosco. Sextilis in fact had 31 days before it was renamed, and it was not chosen for its length (see Julian calendar). According to a senatus consultum quoted by Macrobius, Sextilis was renamed to honor Augustus because several of the most significant events in his rise to power, culminating in the fall of Alexandria, fell in that month. Creation of "Italia" Roman Italy was established by Augustus in 7 BC with the Latin name "Italia". This was the first time that the Italian peninsula was united administratively and politically under the same name. Due to this act, Augustus was called the Father of Italy by Italian historians such as G. Giannelli. Building projects On his deathbed, Augustus boasted "I found a Rome of bricks; I leave to you one of marble." Although there is some truth in the literal meaning of this, Cassius Dio asserts that it was a metaphor for the Empire's strength. Marble could be found in buildings of Rome before Augustus, but it was not extensively used as a building material until the reign of Augustus. Although this did not apply to the Subura slums, which were still as rickety and fire-prone as ever, he did leave a mark on the monumental topography of the centre and of the Campus Martius, with the (Altar of Peace) and monumental sundial, whose central gnomon was an obelisk taken from Egypt. The relief sculptures decorating the visually augmented the written record of Augustus's triumphs in the Res Gestae. Its reliefs depicted the imperial pageants of the praetorians, the Vestals, and the citizenry of Rome. He also built the Temple of Caesar, the Temple of Jupiter Tonans, the Temple of Apollo Palatinus and the Baths of Agrippa, and the Forum of Augustus with its Temple of Mars Ultor. Other projects were either encouraged by him, such as the Theatre of Balbus, and Agrippa's construction of the Pantheon, or funded by him in the name of others, often relations (e.g. Portico of Octavia, Theatre of Marcellus). Even his Mausoleum of Augustus was built before his death to house members of his family. To celebrate his victory at the Battle of Actium, the Arch of Augustus was built in 29 BC near the entrance of the Temple of Castor and Pollux, and widened in 19 BC to include a triple-arch design. After the death of Agrippa in 12 BC, a solution had to be found in maintaining Rome's water supply system. This came about because it was overseen by Agrippa when he served as aedile, and was even funded by him afterwards when he was a private citizen paying at his own expense. In that year, Augustus arranged a system where the Senate designated three of its members as prime commissioners in charge of the water supply and to ensure that Rome's aqueducts did not fall into disrepair. In the late Augustan era, the commission of five senators called the curatores locorum publicorum iudicandorum (translated as "Supervisors of Public Property") was put in charge of maintaining public buildings and temples of the state cult. Augustus created the senatorial group of the curatores viarum (translated as "Supervisors for Roads") for the upkeep of roads; this senatorial commission worked with local officials and contractors to organize regular repairs. The Corinthian order of architectural style originating from ancient Greece was the dominant architectural style in the age of Augustus and the imperial phase of Rome. Suetonius once commented that Rome was unworthy of its status as an imperial capital, yet Augustus and Agrippa set out to dismantle this sentiment by transforming the appearance of Rome upon the classical Greek model. Residences The official residence of Augustus was the Domus Augusti on the Palatine which he made into a palace after buying it in 41/40 BC. He had other residences such as the horti maecenati in Rome where Augustus preferred to stay whenever he became ill and which Maecenas left to him in his will in 8 BC. The great villa of Vedius Pollio at Posilipo near Naples was beqeathed (probably forced) to him in 15 BC. Augustus built the Palazzo a Mare palace on Capri. He also built the immense Villa Giulia on the island of Ventotene as a summer residence early in his reign. The family home of Augustus was probably the villa at Somma Vesuviana, Nola. This was the location where he died and where his father also died. Physical appearance and official images His biographer Suetonius, writing about a century after Augustus's death, described his appearance as: "... unusually handsome and exceedingly graceful at all periods of his life, though he cared nothing for personal adornment. He was so far from being particular about the dressing of his hair, that he would have several barbers working in a hurry at the same time, and as for his beard he now had it clipped and now shaved, while at the very same time he would either be reading or writing something ... He had clear, bright eyes ... His teeth were wide apart, small, and ill-kept; his hair was slightly curly and inclined to golden; his eyebrows met. His ears were of moderate size, and his nose projected a little at the top and then bent ever so slightly inward. His complexion was between dark and fair. He was short of stature, although Julius Marathus, his freedman and keeper of his records, says that he was five feet and nine inches (just under 5 ft. 7 in., or 1.70 meters, in modern height measurements), but this was concealed by the fine proportion and symmetry of his figure, and was noticeable only by comparison with some taller person standing beside him...", adding that "his shoes [were] somewhat high-soled, to make him look taller than he really was". Scientific analysis of traces of paint found in his official statues shows that he most likely had light brown hair and eyes (his hair and eyes were depicted as the same color). His official images were very tightly controlled and idealized, drawing from a tradition of Hellenistic portraiture rather than the tradition of realism in Roman portraiture. He first appeared on coins at the age of 19, and from about 29 BC "the explosion in the number of Augustan portraits attests a concerted propaganda campaign aimed at dominating all aspects of civil, religious, economic and military life with Augustus's person." The early images did indeed depict a young man, but although there were gradual changes his images remained youthful until he died in his seventies, by which time they had "a distanced air of ageless majesty", according to the classicist R. R. R. Smith. Among the best known of many surviving portraits are the Augustus of Prima Porta, the image on the Ara Pacis, and the Via Labicana Augustus, which depicts him in his role as pontifex maximus. Several cameo portraits include the Blacas Cameo and Gemma Augustea. See also Augustan and Julio-Claudian art Augustan literature (ancient Rome) Propaganda in Augustan Rome Bierzo Edict Gaius Maecenas Indo-Roman trade relations Julio-Claudian family tree List of Roman emperors Temple of Augustus Notes References Sources Ancient sources Modern sources Further reading External links Works by and about Augustus at Perseus Digital Library Gallery of the Ancient Art: August The Via Iulia Augusta: road built by the Romans; constructed on the orders of Augustus between the 13–12 B.C. Augustan Legionaries – Augustus's legions and legionaries Augustus – short biography at the BBC Brown, F. The Achievements of Augustus Caesar, Clio History Journal, 2009. "Augustus Caesar and the Pax Romana" – essay by Steven Kreis about Augustus's legacy "De Imperatoribus Romanis" (archived 17 March 2022) – article about Augustus at Garrett G. Fagan's online encyclopedia of Roman emperors Augustus – article by Andrew Selkirk 63 BC births 14 deaths 1st-century BC Roman augurs 1st-century BC Roman consuls 1st-century BC monarchs in Europe 1st-century Roman emperors 1st-century clergy Ancient Roman adoptees Ancient Roman military personnel Burials at the Mausoleum of Augustus Characters in Book VI of the Aeneid Children of Julius Caesar Deified Roman emperors Founding monarchs Julii Caesares Julio-Claudian dynasty People in the canonical gospels Political spokespersons Pontifices Roman pharaohs Shipwreck survivors 1st-century Romans Octavii	11
Transport in Antarctica has transformed from explorers crossing the isolated remote area of Antarctica by foot to a more open era due to human technologies enabling more convenient and faster transport, predominantly by air and water, but also by land as well. Transportation technologies on a remote area like Antarctica need to be able to deal with extremely low temperatures and continuous winds to ensure the travelers' safety. Due to the fragility of the Antarctic environment, only a limited amount of transport movements can take place and sustainable transportation technologies have to be used to reduce the ecological footprint. The infrastructure of land, water and air transport needs to be safe and sustainable. Currently thousands of tourists and hundreds of scientists a year depend on the Antarctic transportation system. Land transport Roads Winds continuously blow snow on roads in Antarctica. The South Pole Traverse (McMurdo–South Pole highway) is approximately long and links the United States McMurdo Station on the coast to the Amundsen–Scott South Pole Station. It was constructed by leveling snow and in crevasses, but is not paved. There are flags to mark the road. Also, the United States Antarctic Program maintains two ice roads during the austral summer. One provides access to Pegasus Field on the Ross Ice Shelf. The ice road between Pegasus Field and McMurdo Station is about . The other road provides access to the Ice Runway, which is on sea ice. The road between the Ice Runway and McMurdo Station varies in length from year to year depending on many factors, including ice stability. These roads are critical for resupplying McMurdo Station, Scott Base, and Amundsen–Scott South Pole Station. Vehicles The scarcity and poor quality of road infrastructure limits land transportation by conventional vehicles. A normal car on tires has very limited capability in Antarctic conditions. Scientific bases are often built on snow-free areas (oases) close to the ocean. Around these stations and on a hard packed snow or ice, tire based vehicles can drive but on deeper and softer snow, a normal tire-based vehicle cannot travel. Due to these limitations, vehicles on belts have been the preferred option in Antarctica. In 1997, two specialized cars with very large tires running tire pressure as low as travelled onto the high Antarctica Plateau, giving strong indication that tire based vehicles could be an option for efficient travelling in Antarctica. Mawson Station started using classic Volkswagen Beetles, the first production cars to be used in Antarctica. The first of these was named "Antarctica 1". In December 1997 into February 1998 two AT44, 4x4 cars (built in Iceland by Arctic Trucks with tire size of 44-inch tall) joined an expedition by the Swedish Polar Institution (SWEA). The cars got used to transport people and supplies from the Ice shelf to WASA station, to perform scanning of the snow and support a drilling expedition to on the Antarctica Plateau 76°S 8°03'W. This is the first time tire based vehicles successfully travel on the Antarctica high plateau. In 2005, a team of six people took part in the Ice Challenger Expedition. Travelling in a specially designed six wheel drive vehicle, the team completed the journey from the Antarctic coast at Patriot Hills to the geographic South Pole in 69 hours. In doing so they easily beat the previous record of 24 days. They arrived at the South Pole on December 12, 2005. The team members on that expedition were Andrew Regan, Jason De Carteret, Andrew Moon, Richard Griffiths, Gunnar Egilsson and Andrew Miles. The expedition successfully showed that wheeled transport on the continent is not only possible but also often more practical. The expedition also hoped to raise awareness about global warming and climate change. From start of December 2008 into February 2009, four AT44, 4x4 cars were used to support a ski race by Amundsen Omega 3, from S82° 41' E17° 43' to South Pole. A film was made of this race by BBC called "On Thin Ice" with Ben Fogle and James Cracknell. The cars started from Novo airbase at S70° 49' E11° 38', establish a route onto the plateau through the crevasse areas in the Shcherbakov Mountain Range driving nearly to the start line of the ski race. For the return journey each car covered between with one fuel depot on the way. From 2008 to date (Dec 2015) tire based cars, AT44 4x4 and AT44 6x6 have been used every season to support various NGO and scientific expedition/projects, supporting flights, fuel drops, filming, skiers, biker, a tractor, collecting snow samples and more. The combined distance covered on the Antarctica Plateau is over and even though towing capacity is much lower than for most belt based vehicles, the tire based cars multiply the travel speed and use only a fraction of the fuel making this an option for some expeditions/projects. A second expedition led by Andrew Regan and Andrew Moon departed in November 2010. The Moon-Regan Trans Antarctic Expedition this time traversed the entire continent twice, using two six-wheel-drive vehicles and a Concept Ice Vehicle designed by Lotus. This time the team used the expedition to raise awareness about the global environmental importance of the Antarctic region and to show that biofuel can be a viable and environmentally friendly option. Water transport Antarctica's only harbour is at McMurdo Station. Most coastal stations have offshore anchorages, and supplies are transferred from ship to shore by small boats, barges, and helicopters. A few stations have a basic wharf facility. All ships at port are subject to inspection in accordance with Article 7, Antarctic Treaty. Offshore anchorage is sparse and intermittent, but poses no problem to sailboats designed for the ice, typically with lifting keels and long shorelines. McMurdo Station (), Palmer Station (); government use only except by permit (see Permit Office under "Legal System"). A number of tour boats, ranging from large motorized vessels to small sailing yachts, visit the Antarctic Peninsula during the summer months (January–March). Most are based in Ushuaia, Argentina. Air transport Transport in Antarctica takes place by air, using fixed-wing aircraft and helicopters. Runways and helicopter pads have to be kept snow-free to ensure safe take off and landing conditions. Antarctica has 20 airports, but there are no developed public-access airports or landing facilities. Thirty stations, operated by 16 national governments party to the Antarctic Treaty, have landing facilities for either helicopters and/or fixed-wing aircraft; commercial enterprises operate two additional air facilities. Helicopter pads are available at 27 stations; runways at 15 locations are gravel, sea-ice, blue-ice, or compacted snow suitable for landing wheeled, fixed-wing aircraft; of these, one is greater than in length, six are between in length, three are between in length, three are less than in length, and two are of unknown length; snow surface skiways, limited to use by ski-equipped, fixed-wing aircraft, are available at another 15 locations; of these, four are greater than 3 km in length, three are between 2 km and 3 km in length, two are between 1 km and 2 km in length, two are less than 1 km in length, and data is unavailable for the remaining four. Antarctic airports are subject to severe restrictions and limitations resulting from extreme seasonal and geographic conditions; they do not meet ICAO standards, and advance approval from the respective governmental or nongovernmental operating organization is required for landing (1999 est.) Flights to the continent in the permanent darkness of the winter are normally only undertaken in an emergency, with burning barrels of fuel to outline a runway. On September 11, 2008, a United States Air Force C-17 Globemaster III successfully completed the first landing in Antarctica using night-vision goggles at Pegasus Field. In April 2001 an emergency evacuation of Dr. Ronald Shemenski was needed from Amundsen–Scott South Pole Station when he contracted pancreatitis. Three C-130 Hercules were called back before their final leg because of weather. Organizers then called on Kenn Borek Air based in Calgary, Alberta. Two de Havilland Twin Otters were dispatched out of Calgary with one being back-up. Twin Otters are specifically designed for the Canadian north and Kenn Borek Air's motto is "Anywhere, Anytime, World-Wide". The mission was a success but not without difficulties and drawbacks. Ground crews needed to create a runway with tracked equipment not designed to operate in the low temperatures at that time of year, the aircraft controls had to be "jerry-rigged" when the flaps were frozen in position after landing, and instruments were not reliable because of the cold. When they saw a "faint pink line on the horizon" they knew they were going in the right direction. This was the first rescue from the South Pole during winter. Canada honoured the Otter crew for bravery. In 2021, an Airbus A340 aeroplane operated by Portuguese charter airline Hi Fly landed in Antarctica for the first time. See also Tourism in Antarctica List of airports in Antarctica Bibliography of Antarctica References External links Webpage of the Swedish Polar Research Secretariat on logistics	6
The Antarctic Treaty and related agreements, collectively known as the Antarctic Treaty System (ATS), regulate international relations with respect to Antarctica, Earth's only continent without a native human population. It was the first arms control agreement established during the Cold War, setting aside the continent as a scientific preserve, establishing freedom of scientific investigation, and banning military activity; for the purposes of the treaty system, Antarctica is defined as all the land and ice shelves south of 60°S latitude. Since September 2004, the Antarctic Treaty Secretariat, which implements the treaty system, is headquartered in Buenos Aires, Argentina. The main treaty was opened for signature on 1 December 1959, and officially entered into force on 23 June 1961. The original signatories were the 12 countries active in Antarctica during the International Geophysical Year (IGY) of 1957–58: Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, the Soviet Union, the United Kingdom, and the United States. These countries had established over 55 Antarctic research stations for the IGY, and the subsequent promulgation of the treaty was seen as a diplomatic expression of the operational and scientific cooperation that had been achieved. , the treaty has 56 parties. History 1940s After World War II, the U.S. considered establishing a claim in Antarctica. From 26 August 1946, and until the beginning of 1947, it carried out Operation Highjump, the largest military expeditionary force that the United States had ever sent to Antarctica, consisting of 13 ships, 4,700 men, and numerous aerial devices. Its goals were to train military personnel and to test material in conditions of extreme cold for a hypothetical war in the Antarctic. On 2 September 1947, the quadrant of Antarctica in which the United States was interested (between 24° W and 90° W) was included as part of the security zone of the Inter-American Treaty of Reciprocal Assistance, committing its members to defend it in case of external aggression. In August 1948, the United States proposed that Antarctica be under the guardianship of the United Nations, as a trust territory administered by Argentina, Australia, Chile, France, the United States, the United Kingdom, and New Zealand. This idea was rejected by Argentina, Australia, Chile, France, and Norway. Before the rejection, on 28 August 1948, the United States proposed to the claimant countries some form of internationalization of Antarctica, and the United Kingdom supported this. Chile responded by presenting a plan to suspend all Antarctic claims for five to ten years while negotiating a final solution, but this did not find acceptance. In 1950, the interest of the United States to keep the Soviet Union away from Antarctica was frustrated, when the Soviets informed the claimant states that they would not accept any Antarctic agreement in which they were not represented. The fear that the USSR would react by making a territorial claim, bringing the Cold War to Antarctica, led the United States to make none. International conflicts Various international conflicts motivated the creation of an agreement for the Antarctic. Some incidents had occurred during the Second World War, and a new one occurred in Hope Bay on 1 February 1952, when the Argentine military fired warning shots at a group of Britons. The response of the United Kingdom was to send a warship that landed marines at the scene on 4 February. In 1949, Argentina, Chile, and the United Kingdom signed a Tripartite Naval Declaration committing not to send warships south of the 60th parallel south, which was renewed annually until 1961 when it was deemed unnecessary when the treaty entered into force. This tripartite declaration was signed after the tension generated when Argentina sent a fleet of eight warships to Antarctica in February 1948. On 17 January 1953, Argentina reopened the Lieutenant Lasala refuge on Deception Island, leaving a sergeant and a corporal in the Argentine Navy. On 15 February, in the incident on Deception Island, 32 royal marines landed from the British frigate HMS Snipe armed with Sten machine guns, rifles, and tear gas capturing the two Argentine sailors. The Argentine refuge and a nearby uninhabited Chilean shelter were destroyed, and the Argentine sailors were delivered to a ship from that country on 18 February near South Georgia. A British detachment remained three months on the island while the frigate patrolled its waters until April. On 4 May 1955, the United Kingdom filed two lawsuits, against Argentina and Chile respectively, before the International Court of Justice to declare the invalidity of the claims of the sovereignty of the two countries over Antarctic and sub-Antarctic areas. On 15 July 1955, the Chilean government rejected the jurisdiction of the court in that case, and on 1 August, the Argentine government also did so, so on 16 March 1956, the claims were closed. In 1956 and 1958, India tried unsuccessfully to bring the Antarctic issue to the United Nations General Assembly. International Geophysical Year In 1950, the International Council of Scientific Unions (ICSU) had discussed the possibility of holding a third International Polar Year. At the suggestion of the World Meteorological Organization, the idea of the International Polar Year was extended to the entire planet, thus creating the International Geophysical Year that took place between 1 July 1957, and 31 December 1958. In this event, 66 countries participated. At the ICSU meeting in Stockholm from 9 to 11 September 1957, the creation of a Special Committee for Antarctic Research (SCAR) was approved, inviting the twelve countries conducting Antarctic investigations to send delegates to integrate the committee, with the purpose of exchanging scientific information among its members regarding Antarctica. The SCAR was later renamed to the Scientific Committee for Research in Antarctica. Both Argentina and Chile stated that research carried out on the continent during the International Geophysical Year would not give any territorial rights to the participants, and that the facilities that were erected during that year should be dismantled at the end of it. However, in February 1958, the United States proposed that the Antarctic investigations should be extended for another year, and the Soviet Union reported that it would maintain its scientific bases until the studies being carried out had been completed. Negotiation of the treaty Scientific bases increased international tension concerning Antarctica. The danger of the Cold War spreading to that continent caused the President of the United States, Dwight D. Eisenhower, to convene an Antarctic Conference of the twelve countries active in Antarctica during the International Geophysical Year, to sign a treaty. In the first phase, representatives of the twelve nations met in Washington, who met in sixty sessions between June 1958 and October 1959 to define a basic negotiating framework. However, no consensus was reached on a preliminary draft. In the second phase, a conference at the highest diplomatic level was held from 15 October to 1 December 1959, when the Treaty was signed. The Antarctic Treaty was signed in 1959 by 12 nations and came into effect in the mid-1960s. The central ideas with full acceptance were the freedom of scientific research in Antarctica and the peaceful use of the continent. There was also a consensus for demilitarization and the maintenance of the status quo. The treaty prohibits nuclear testing, military operations, economic exploitation, and territorial claims in Antarctica. It is monitored through on-site inspections. The only permanent structures allowed are scientific research stations. The original signatory countries hold voting rights on Antarctic governance, with seven of them claiming portions of the continent and the remaining five being non-claimants. Other nations have joined as consultative members by conducting significant research in Antarctica. Non-consultative parties can also adhere to the treaty. In 1991-1992, the treaty was renegotiated by 33 nations, with the main change being the Madrid Protocol on Environmental Protection, which prohibited mining and oil exploration for 50 years. The positions of the United States, the Soviet Union, the United Kingdom, and New Zealand coincided in the establishment of an international administration for Antarctica, proposing that it should be within the framework of the United Nations. Australia and the United Kingdom expressed the need for inspections by observers, and the British also proposed the use of military personnel for logistical functions. Argentina proposed that all atomic explosions be banned in Antarctica, which caused a crisis that lasted until the last day of the conference, since the United States, along with other countries, intended to ban only those that were made without prior notice and without prior consultation. The support of the USSR and Chile for the Argentine proposal finally caused the United States to retract its opposition. The signing of the treaty was the first arms control agreement that occurred in the framework of the Cold War, and the participating countries managed to avoid the internationalization of Antarctic sovereignty. As of the year 2048, any of the consultative parties to the treaty may request the revision of the treaty and its entire normative system, with the approval of a relative majority. Other agreements Other agreements – some 200 recommendations adopted at treaty consultative meetings and ratified by governments – include: Agreed Measures for the Conservation of Antarctic Fauna and Flora (1964) (entered into force in 1982) The Convention for the Conservation of Antarctic Seals (1972) The Convention for the Conservation of Antarctic Marine Living Resources (1982) The Convention on the Regulation of Antarctic Mineral Resource Activities (1988) (signed in 1988, not in force) The Protocol on Environmental Protection to the Antarctic Treaty was signed 4 October 1991, and entered into force 14 January 1998; this agreement prevents development and provides for the protection of the Antarctic environment through five specific annexes on marine pollution, fauna and flora, environmental impact assessments, waste management, and protected areas. It prohibits all activities relating to mineral resources except scientific. A sixth annex on liability arising from environmental emergencies was adopted in 2005, but is yet to enter into force. Bilateral treaties Exchange of Notes constituting an Agreement between the Governments of Australia, New Zealand and the United Kingdom of Great Britain and Northern Ireland, and the Government of the French Republic, regarding Aerial Navigation in the Antarctic (Paris, 25 October 1938) Treaty Between the Government of Australia and the Government of the French Republic on Cooperation in the Maritime Areas Adjacent to the French Southern and Antarctic Territories (TAAF), Heard Island and the McDonald Islands (Canberra, 24 November 2003) Agreement on Cooperative Enforcement of Fisheries Laws between the Government of Australia and the Government of the French Republic in the Maritime Areas Adjacent to the French Southern and Antarctic Territories, Heard Island and the McDonald Islands (Paris, 8 January 2007) Meetings The Antarctic Treaty System's yearly Antarctic Treaty Consultative Meetings (ATCM) are the international forum for the administration and management of the region. Only 29 of the 56 parties to the agreements have the right to participate in decision-making at these meetings, though the other 27 are still allowed to attend. The decision-making participants are the Consultative Parties and, in addition to the 12 original signatories, including 17 countries that have demonstrated their interest in Antarctica by carrying out substantial scientific activity there. The Antarctic Treaty also has Special Antarctic Treaty Consultative Meetings (SATCM), which are generally summoned to treat more important topics but are less frequents and Meetings of Experts. Parties As of 2023, there are 56 states party to the treaty, 29 of which, including all 12 original signatories to the treaty, have consultative (voting) status. The consultative members include the 7 countries that claim portions of Antarctica as their territory. The 49 non-claimant countries do not recognize the claims of others. 42 parties to the Antarctic Treaty have also ratified the "Protocol on Environmental Protection to the Antarctic Treaty". Overview of parties to the Antarctic Treaty System * Has an overlapping claim with another one or two claimants. † Reserved the right to make a claim. Antarctic Treaty Secretariat The Antarctic Treaty Secretariat was established in Buenos Aires, Argentina in September 2004 by the Antarctic Treaty Consultative Meeting (ATCM). Jan Huber (the Netherlands) served as the first Executive Secretary for five years until 31 August 2009. He was succeeded on 1 September 2009, by Manfred Reinke (Germany). Reinke was succeeded by Albert Lluberas (Uruguay), who was elected in June 2017 at the 40th Antarctic Consultative Treaty Meeting in Beijing, China. The tasks of the Antarctic Treaty Secretariat can be divided into the following areas: Supporting the annual Antarctic Treaty Consultative Meeting (ATCM) and the meeting of the Committee for Environmental Protection (CEP). Facilitating the exchange of information between the Parties required in the Treaty and the Environment Protocol. Collecting, storing, arranging and publishing the documents of the ATCM. Providing and disseminating public information about the Antarctic Treaty system and Antarctic activities. Legal system Antarctica currently has no permanent population and therefore it has no citizenship nor government. Personnel present on Antarctica at any time are always citizens or nationals of some sovereignty outside Antarctica, as there is no Antarctic sovereignty. The majority of Antarctica is claimed by one or more countries, but most countries do not explicitly recognize those claims. The area on the mainland between 90 degrees west and 150 degrees west is the only major land on Earth not claimed by any country. Until 2015 the interior of the Norwegian Sector, the extent of which had never been officially defined, was considered to be unclaimed. That year, Norway formally laid claim to the area between its Queen Maud Land and the South Pole. Governments that are party to the Antarctic Treaty and its Protocol on Environmental Protection implement the articles of these agreements, and decisions taken under them, through national laws. These laws generally apply only to their own citizens, wherever they are in Antarctica, and serve to enforce the consensus decisions of the consultative parties: about which activities are acceptable, which areas require permits to enter, what processes of environmental impact assessment must precede activities, and so on. The Antarctic Treaty is often considered to represent an example of the common heritage of mankind principle. Australia Since the designation of the Australian Antarctic Territory pre-dated the signing of the Antarctic Treaty, Australian laws that relate to Antarctica date from more than two decades before the Antarctic Treaty era. In terms of criminal law, the laws that apply to the Jervis Bay Territory (which follows the laws of the Australian Capital Territory) apply to the Australian Antarctic Territory. Key Australian legislation applying Antarctic Treaty System decisions include the Antarctic Treaty Act 1960, the Antarctic Treaty (Environment Protection) Act 1980 and the Antarctic Marine Living Resources Conservation Act 1981. United States The law of the United States, including certain criminal offences by or against U.S. nationals, such as murder, may apply to areas not under jurisdiction of other countries. To this end, the United States now stations special deputy U.S. Marshals in Antarctica to provide a law enforcement presence. Some U.S. laws directly apply to Antarctica. For example, the Antarctic Conservation Act, Public Law 95-541, et seq., provides civil and criminal penalties for the following activities, unless authorized by regulation or statute: the taking of native Antarctic mammals or birds the introduction into Antarctica of non-indigenous plants and animals entry into specially protected or scientific areas the discharge or disposal of pollutants into Antarctica or Antarctic waters the importation into the U.S. of certain items from Antarctica Violation of the Antarctic Conservation Act carries penalties of up to US$10,000 in fines and one year in prison. The Departments of the Treasury, Commerce, Transportation, and the Interior share enforcement responsibilities. The Act requires expeditions from the U.S. to Antarctica to notify, in advance, the Office of Oceans and Polar Affairs of the State Department, which reports such plans to other nations as required by the Antarctic Treaty. Further information is provided by the Office of Polar Programs of the National Science Foundation. New Zealand In 2006, the New Zealand police reported that jurisdictional issues prevented them issuing warrants for potential American witnesses who were reluctant to testify during the Christchurch Coroner's investigation into the death by poisoning of Australian astrophysicist Rodney Marks at the South Pole base in May 2000. Dr. Marks died while wintering over at the United States' Amundsen–Scott South Pole Station located at the geographic South Pole. Prior to autopsy, the death was attributed to natural causes by the National Science Foundation and the contractor administering the base. However, an autopsy in New Zealand revealed that Dr. Marks died from methanol poisoning. The New Zealand Police launched an investigation. In 2006, frustrated by lack of progress, the Christchurch Coroner said that it was unlikely that Dr. Marks ingested the methanol knowingly, although there is no certainty that he died as the direct result of the act of another person. During media interviews, the police detective in charge of the investigation criticized the National Science Foundation and contractor Raytheon for failing to cooperate with the investigation. South Africa Under the South African Citizens in Antarctica Act, 1962, South African law applies to all South African citizens in Antarctica, and they are subject to the jurisdiction of the magistrate's court in Cape Town. The Antarctic Treaties Act, 1996 incorporates the Antarctic Treaty and related agreements into South African law. In regard to violations of these treaties, South Africa also asserts jurisdiction over South African residents and members of expeditions organised in South Africa. See also Antarctic and Southern Ocean Coalition (ASOC) Antarctic Protected Areas Antarctic Treaty issue Arctic Council Arctic sanctuary Crime in Antarctica Endurance – lost ship of Ernest Shackleton, found in 2022 and protected by the treaty International Seabed Authority Montreal Protocol Moon treaty Multilateral treaty National Antarctic Program Category: Outposts of Antarctica Research stations in Antarctica Solar radiation management Svalbard Treaty References External links Antarctic Treaty Secretariat Full Text of the Antarctic Treaty Original facsimile of Antarctic Treaty Australian Antarctic Territory Why 60 South? National Science Foundation – Office of Polar Programs List of all Antarctic Treaty Consultative Meetings An Antarctic Solution for the Koreas San Diego Union-Tribune, 25 August 2005 (Both South Korea and North Korea are members of the Antarctic Treaty) Emblem of the Antarctic Treaty Antarctica agreements 1959 in Antarctica 1959 in Washington, D.C. December 1959 events 1961 in Antarctica 1961 in the environment Arms control treaties Cold War treaties Territorial claims in Antarctica Treaties concluded in 1959 Treaties entered into force in 1961 Treaties establishing nuclear-weapon-free zones Treaties of Argentina Treaties of Australia Treaties of Austria Treaties of Belarus Treaties of Belgium Treaties of the military dictatorship in Brazil Treaties of the People's Republic of Bulgaria Treaties of Canada Treaties of Chile Treaties of the People's Republic of China Treaties of Colombia Treaties of Cuba Treaties of Denmark Treaties of the Czech Republic Treaties of Czechoslovakia Treaties of Ecuador Treaties of Estonia Treaties of Finland Treaties of France Treaties of West Germany Treaties of East Germany Treaties of Greece Treaties of Guatemala Treaties of the Hungarian People's Republic Treaties of Italy Treaties of India Treaties of Japan Treaties of Malaysia Treaties of Monaco Treaties of the Netherlands Treaties of New Zealand Treaties of North Korea Treaties of Norway Treaties of Pakistan Treaties of Papua New Guinea Treaties of Peru Treaties of the Polish People's Republic Treaties of Portugal Treaties of the Socialist Republic of Romania Treaties of the Soviet Union Treaties of Slovakia Treaties of South Africa Treaties of South Korea Treaties of Spain Treaties of Sweden Treaties of Switzerland Treaties of Turkey Treaties of Ukraine Treaties of the United Kingdom Treaties of the United States Treaties of Uruguay Treaties of Venezuela History of the Ross Dependency December 1959 events in the United States	9
Ames () is a city in Story County, Iowa, United States, located approximately north of Des Moines in central Iowa. It is best known as the home of Iowa State University (ISU), with leading agriculture, design, engineering, and veterinary medicine colleges. A United States Department of Energy national laboratory, Ames Laboratory, is located on the ISU campus. According to the 2020 census, Ames had a population of 66,427, making it the state's ninth most populous city. Iowa State University was home to 27,854 students as of spring 2023, which make up approximately one half of the city's population. Ames also hosts United States Department of Agriculture (USDA) sites: the largest federal animal disease center in the United States, the USDA Agricultural Research Service's National Animal Disease Center (NADC), as well as one of two national USDA sites for the Animal and Plant Health Inspection Service (APHIS), which comprises the National Veterinary Services Laboratory and the Center for Veterinary Biologics. Ames also hosts the headquarters for the Iowa Department of Transportation. History The city was founded in 1864 as a station stop on the Cedar Rapids and Missouri Railroad and was named after 19th century U.S. Congressman Oakes Ames of Massachusetts, who was influential in the building of the transcontinental railroad. Ames was founded by local resident Cynthia Olive Duff (née Kellogg) and railroad magnate John Insley Blair, near a location that was deemed favorable for a railroad crossing of the Skunk River. Geography Ames is located along the western edge of Story County, roughly north of the state capital, Des Moines, near the intersection of Interstate 35 and U.S. Route 30. A smaller highway, U.S. Route 69, passes through the town. Also passing through Ames is the cross country line of the Union Pacific Railroad and two small streams (the South Skunk River and Ioway Creek). According to the United States Census Bureau, the city has a total area of , of which is land and is water. Campustown Campustown is the neighborhood directly south of Iowa State University Central Campus bordered by Lincoln Way on the north. Campustown is a high-density mixed-use neighborhood that is home to many student apartments, nightlife venues, restaurants, and numerous other establishments, most of which are unique to Ames. Climate Ames has a humid continental climate (Köppen climate classification Dfa). On average, the warmest month is July and the coldest is January. The highest recorded temperature was in 1988 and the lowest was in 1996. Demographics 2010 census As of the census of 2010, there were 58,965 people, 22,759 households, and 9,959 families residing in the city. The population density was . There were 23,876 housing units at an average density of . The racial makeup of the city was 84.5% White, 3.4% African American, 0.2% Native American, 8.8% Asian, 1.1% from other races, and 2.0% from two or more races. Hispanic or Latino of any race were 3.4% of the population. There were 22,759 households, of which 19.1% had children under the age of 18 living with them, 35.6% were married couples living together, 5.4% had a female householder with no husband present, 2.7% had a male householder with no wife present, and 56.2% were non-families. 30.5% of all households were made up of individuals, and 6.2% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.82. The median age in the city was 23.8 years. 13.4% of residents were under the age of 18; 40.5% were between the ages of 18 and 24; 22.9% were from 25 to 44; 15% were from 45 to 64; and 8.1% were 65 years of age or older. The gender makeup of the city was 53.0% male and 47.0% female. 2000 census As of the census of 2000, there were 50,731 people, 18,085 households, and 8,970 families residing in the city. The population density was . There were 18,757 housing units at an average density of . The racial makeup of the city was 87.34% White, 7.70% Asian, 2.65% African American, 0.04% Native American, 0.76% Pacific Islander and other races, and 1.36% from two or more races. Hispanic or Latino of any race were 1.98% of the population. There were 18,085 households, out of which 22.3% had children under the age of 18 living with them, 42.0% were married couples living together, 5.3% had a female householder with no husband present, and 50.4% were non-families. 28.5% of all households were made up of individuals, and 5.9% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.85. Age spread: 14.6% under the age of 18, 40.0% from 18 to 24, 23.7% from 25 to 44, 13.9% from 45 to 64, and 7.7% who were 65 years of age or older. The median age was 24 years. For every 100 females, there were 109.3 males. For every 100 females age 18 and over, there were 109.9 males. The median income for a household in the city was $36,042, and the median income for a family was $56,439. Males had a median income of $37,877 versus $28,198 for females. The per capita income for the city was $18,881. About 7.6% of families and 20.4% of the population were below the poverty line, including 9.2% of those under age 18 and 4.1% of those age 65 or over. Metropolitan area The U.S. Census Bureau designates the Ames MSA as encompassing all of Story County. While Ames is the largest city in Story County, the county seat is in the nearby city of Nevada, east of Ames. Ames metropolitan statistical area combined with the Boone, Iowa micropolitan statistical area (Boone County, Iowa) make up the larger Ames-Boone combined statistical area. Ames is the larger principal city of the Combined Statistical Area that includes all of Story County, Iowa and Boone County, Iowa. which had a combined population of 106,205 at the 2000 census. Economy Ames is home of Iowa State University of Science and Technology, a public land-grant and space-grant research university. At its founding in 1858, Iowa State was known as the Iowa State College of Agriculture and Mechanic Arts. Ames is the home of the closely allied U.S. Department of Agriculture's National Animal Disease Center (See Ames strain), the U.S. Department of Energy's Ames Laboratory (a major materials research and development facility), and the main offices of the Iowa Department of Transportation. State and Federal institutions are the largest employers in Ames. Other area employers include a 3M manufacturing plant; Danfoss Power Solutions, a hydraulics manufacturer; Barilla, a pasta manufacturer; Ball, a manufacturer of canning jars and plastic bottles; Workiva, a global cloud computing company; Renewable Energy Group, America's largest producer of biomass-based diesel; and the National Farmers Organization. The Iowa State University Research Park is a not-for-profit business development incubator located in Ames, and affiliated with Iowa State University. In 2015, Ames was ranked in the top 15 "Cities That Have Done the Best Since the Recession" by Bloomberg Businessweek. The Bureau of Labor Statistics ranked Ames and Boulder, Colorado as having the lowest unemployment rate (2.5%) of any metropolitan area in the US in 2016. By June 2018, unemployment in Ames had fallen even further, to 1.5%, though wage increases for workers were not keeping pace with rising rents. Top employers As of 2022, the top employers in the city are: Arts and culture Ames History Museum - founded in 1980, the museum also operates a historic schoolhouse. Brunnier Art Museum (Scheman Building) Ames Public Library - located in a Carnegie library, it was founded in 1904. it has 1,386,273 items in circulations, including 799,349 books and 586,924 multimedia items. The Octagon Center for the Arts - the Center includes galleries, art classes, art studios, and retail shop. They sponsor the local street fair, The Octagon Arts Festival, and hold an annual National Juried Exhibition Clay, Fiber, Paper Glass Metal, Wood. Sports Iowa Sports Foundation The Iowa State Cyclones play a variety of sports in the Ames area. The Iowa State Cyclones football team plays at Jack Trice Stadium in Ames. Also, the Cyclones' Men's and Women's Basketball teams and Volleyball teams play at Hilton Coliseum just across the street from Jack Trice Stadium. The Iowa State Cyclones are a charter member of the Big 12 Conference in all sports and compete in NCAA Division I-A. The Iowa State Women's Tennis is also well known and very successful. The Ames Figure Skating Club provides recreational to professional level skating opportunities. The club sponsors the Learn to Skate Program. Coaches provide on and off ice lessons or workshops. The club hosts the figure skating portion of the Iowa Games competition every summer. In the fall the club hosts Cyclone Country Championships. The Ames ISU ice arena also hosts the Iowa State Cyclones hockey team. The arena also hosts the Ames Little Cyclones hockey program for high school students and children in elementary or middle school. Education Much of the city is served by the Ames Community School District. A portion of northern Ames is zoned to the Gilbert Community School District. Public high school in Ames Ames High School: Grades 9–12 Public elementary/middle schools in Ames David Edwards Elementary: K-5 Abbie Sawyer Elementary School: Grades K-5 Kate Mitchell Elementary School: Grades K-5 Warren H. Meeker Elementary School: Grades K-5 Gertrude Fellows Elementary School: Grades K-5 Ames Middle School: Grades 6–8 Gilbert CSD students are zoned to Gilbert High School. Private schools in Ames Ames Christian School Saint Cecilia School (preK – 5th grade) Iowa State University Iowa State University of Science and Technology, more commonly known as Iowa State University (ISU), is a public land-grant and space-grant research university located in Ames. Iowa State University is the birthplace of the Atanasoff–Berry Computer, the world's first electronic digital computer. Iowa State has produced a number of astronauts, scientists, Nobel laureates, and Pulitzer Prize winners. Until 1945 it was known as the Iowa State College of Agriculture and Mechanic Arts. The university is a member of the American Association of Universities and the Big 12 Conference. ISU is the nation's first designated land-grant university. In 1856, the Iowa General Assembly enacted legislation to establish the State Agricultural College and Model Farm. Story County was chosen as the location on June 21, 1859, from proposals by Johnson, Kossuth, Marshall, Polk, and Story counties. When Iowa accepted the provisions of the Morrill Act of 1862, Iowa State became the first institution in nation designated as a land-grant college. The institution was coeducational from the first preparatory class admitted in 1868. The formal admitting of students began the following year, and the first graduating class of 1872 consisted of 24 men and 2 women. The first building on the Iowa State campus was Farm House. Built in the 1860s, it currently serves as a museum and National Historic Landmark. Today, Iowa State has over 60 notable buildings, including Beardshear Hall, Morrill Hall, Memorial Union, Catt Hall, Curtiss Hall, Carver Hall, Parks Library, the Campanile, Hilton Coliseum, C.Y. Stephens Auditorium, Fisher Theater, Jack Trice Stadium, Lied Recreation Center, numerous residence halls, and many buildings specific to ISU's many different majors and colleges. The official mascot for ISU is Cy the Cardinal. The official school colors are cardinal and gold. The Iowa State Cyclones play in the NCAA's Division I-A as a member of the Big 12 Conference. Media Online and newsprint Ames Tribune, Tuesday-Sunday paper produced in Ames. Iowa State Daily, independent student newspaper produced at Iowa State University. The Des Moines Register also provides extensive coverage of Iowa news and sports to Ames. Story County Sun, weekly newspaper that covers the entire county published in Ames. Radio stations licensed to Ames KURE, student radio operated at Iowa State University. WOI-FM, Iowa Public Radio's flagship "Studio One" station, broadcasting an NPR news format during the day and a music format in the evening, owned and operated at Iowa State University. WOI (AM), Iowa Public Radio's flagship station delivering a 24-hour news format consisting mainly of NPR programming, owned and operated at Iowa State University. KOEZ, Adult Contemporary station licensed to Ames, but operated in Des Moines. KCYZ, Hot Adult Contemporary station owned and operated by Clear Channel in Ames. KASI, news/talk station owned and operated by Clear Channel in Ames. KNWM-FM, Contemporary Christian Madrid/Ames station owned and operated by the University of Northwestern – St. Paul - simulcast with KNWI-FM Osceola/Des Moines KHOI, Community Radio station licensed to Story City with studios in Ames. KHOI broadcasts music and local public affairs programs and is affiliated with the Pacifica Radio network. Ames is also served by stations in the Des Moines media market, which includes Clear Channel's 50,000-watt talk station WHO, music stations KAZR, KDRB, KGGO, KKDM, KHKI, KIOA, KJJY, KRNT, KSPZ and KSTZ, talk station KWQW, and sports stations KXNO and KXNO-FM. Television Like radio, Ames is served by the Des Moines media market. WOI-DT, the ABC affiliate in central Iowa, was originally owned and operated by Iowa State University until the 1990s. The station is still licensed to Ames, but studio's are located in West Des Moines. Other stations serving Ames include KCCI, KDIN-TV, WHO-DT, KCWI-TV, KDMI, KDSM-TV and KFPX-TV. Channel 12 is owned by the City of Ames and overseen by the City Manager's Office. The channel broadcasts meetings for city council as well as other city government councils and boards. Channel 12 also produces its own original content focused on news and other happenings in Ames. Channel 12 has won various regional and national awards including a NATOA Government Programming Award and a Telly Award. Channel 12's goals are "To provide quality programming to the citizens of Ames that educates and informs about city government issues" and "To provide live coverage and rebroadcasts of council and commission meetings." Channel 16 serves as Ames' public access TV channel. "The purpose of Ames Public Access TV (Channel 16) is to provide residents the opportunity to broadcast locally produced programs on cable television. APATV provides cablecasting of non-commercial, public access programming independently produced by professionals or non-professionals in either a VHS or DVD format. This service is provided on a first-come-first-served, non-discriminatory, non monopolistic basis. Other services include video messaging to serve as a community calendar." Infrastructure Transportation The town is served by U.S. Highways 30 and 69 and Interstate 35. Ames is the only town in Iowa with a population of greater than 50,000 that does not have a state highway serving it. , Ames currently has three roundabouts constructed on University Avenue/530th Avenue. The first is at the intersection of Airport Road (Oakwood Rd.) and University Avenue, the second at the intersection of Cottonwood Road and 530th Avenue and the third at Collaboration Place and 530th Avenue. Ames was serviced by the Fort Dodge, Des Moines and Southern Railroad via a branch from Kelley to Iowa State and to downtown Ames. The tracks were removed in the 1960s. The Chicago and North Western Transportation Company twin mainline runs east and west bisecting the town and running just south of the downtown business district. The C&NW used to operate a branch to Des Moines. This line was removed in the 1980s when the Spine Line through the nearby city of Nevada was purchased from the Rock Island Railroad after its bankruptcy. The Union Pacific, successor to the C&NW, still runs 60–70 trains a day through Ames on twin mainlines, which leads to some traffic delays. There is also a branch to Eagle Grove that leaves Ames to the north. The Union Pacific maintains a small yard called Ames Yard east of Ames between Ames and Nevada. Ames has been testing automatic train horns at several of its crossings. These directional horns which are focused down the streets are activated when the crossing signals turn on and are shut off after the train crosses the crossing. This system cancels out the need for the trains to blow their horns. Train noise had been a problem in the residential areas to the west and northwest of downtown. Ames Municipal Airport is located southeast of the city. The current (and only) fixed-base operator is Central Iowa Air Service. The airport has two runways – 01/19, which is , and 13/31, which is . The City of Ames offers a transit system throughout town, called CyRide, that is funded jointly by Iowa State University, the ISU Government of the Student Body, and the City of Ames. Rider fares are free for children under five, while students pay a set cost as part of their tuition. In addition to local transit, Ames is served by intercity buses from Jefferson Lines, which stop at the Ames Intermodal Facility. In 2009, the Ames metropolitan statistical area (MSA) ranked as the third highest in the United States for percentage of commuters who walked to work (10.4 percent). Ames has the headquarters of the Iowa Department of Transportation. Health care Ames is served by Mary Greeley Medical Center, a 220-bed regional referral hospital which is adjacent to McFarland Clinic PC, central Iowa's largest physician-owned multi-specialty clinic, and also Iowa Heart Center. Parks and recreation On September 10, 2019 the City of Ames proposed a $29,000,000 bond for building a fitness center called the Healthy Life Center. It failed to pass. Iowa State University owns the land it was to be built on. In popular culture The character of Kate Austen in the television series Lost (2004–2010) is from Ames. Ames is prominently featured in Jeffrey Zaslow's 2009 book The Girls from Ames. Ames is featured in the 2012 Supernatural episode "Heartache". Ames is mentioned in the music video for Bo Burnham's 2013 song "Repeat Stuff", which shows satirical subliminal messages quickly flashing up on the screen, one of which states that "Michael Clarke Duncan is alive and living in Ames, Iowa". Notable people This is a list of notable people associated with Ames, Iowa arranged by career and in alphabetical order. Acting Evan Helmuth, actor (1977-2017) (Fever Pitch, The Devil Inside) Nick Nolte, actor, lived in Ames, 1945-1950 Artists and photographers John E. Buck, sculptor Robert Crumb, cartoonist and musician, the Crumb family moved to Ames in August 1950, for two years. Margaret Lloyd, opera singer Laurel Nakadate, American video artist, filmmaker and photographer Velma Wallace Rayness (1896–1977), "V.W. Rayness," author, painter and artist Brian Smith, Pulitzer Prize-winning photographer, born July 16, 1959 Aviation Mary Anita (née Snook) Southern, pioneer aviator, taught Amelia Earhart to fly. Musicians John Darnielle, musician from indie rock band The Mountain Goats; former Ames resident Envy Corps, indie rock band Leslie Hall, electronic rap musician/Gem Sweater collector, born in Ames in 1981 Peter Schickele, musician, born in Ames in 1935 Richie Hayward, drummer and founding member of the band Little Feat; former Ames resident and graduate of Ames High School Journalists Robert Bartley, editorial page editor of The Wall Street Journal and a Presidential Medal of Freedom recipient; raised in Ames and ISU graduate Wally Bruner, ABC News journalist and television host Michael Gartner, former president of NBC News; retired to own and publish the Ames Tribune Politicians Ruth Bascom, Mayor of Eugene, Oregon Edward Mezvinsky, former U.S. Congressman; father-in-law of Chelsea Clinton; raised in Ames Bee Nguyen, former Georgia (U.S. state) state representative Bob Walkup, Mayor of Tucson, Arizona Lee Teng-hui, President of the Republic of China, ISU graduate Henry A. Wallace, 11th United States Secretary of Agriculture, 10th United States Secretary of Commerce, and 33rd Vice President of the United States, ISU graduate; lived in Ames from 1892 - 1896 Sports Harrison Barnes, NBA player, 2015 NBA champion, 2016 U.S. Olympic gold medalist, Ames HS graduate Joe Burrow, NFL player, 2019 Heisman Trophy Award Winner, 2020 CFP National Championship Winner. Born in Ames, but grew up in The Plains, Ohio Juan Sebastián Botero, soccer player Doug McDermott, basketball player, Ames HS graduate Kip Corrington, NFL player Dick Gibbs, NBA player, Ames HS graduate Terry Hoage, NFL player Fred Hoiberg, retired NBA basketball player; raised in Ames, ISU graduate, former ISU basketball coach, former coach of the Chicago Bulls and current Nebraska men's basketball coach. Cael Sanderson, U.S. Olympic gold medalist; undefeated, four-time NCAA wrestling champion; former ISU wrestling coach and alumnus Herb Sies, pro football player and coach Billy Sunday, evangelist and Major League Baseball player; born in Ames in 1863 Fred Tisue, Olympian water polo player Scientists George Washington Carver, inventor, Iowa State University alumnus and professor Laurel Blair Salton Clark, astronaut, died on STS-107 Charles W. "Chuck" Durham, civil engineer, philanthropist, civic leader, former CEO and chairman Emeritus of HDR, Inc.; raised in Ames Lyle Goodhue, scientist, lived and studied here 1925–1934 Frank Spedding, chemist, creator of the Ames Process during the Manhattan Project Dan Shechtman, awarded 2011 Nobel Prize in Chemistry for "the discovery of quasicrystals"; Professor of Materials Science at Iowa State University (2004–present) and Associate at the Department of Energy's Ames Laboratory George W. Snedecor, statistician, founder of first academic department of statistics in the United States at Iowa State University Writers and poets Ann Cotten, poet, born in Ames, grew up in Vienna Brian Evenson, author Jane Espenson, writer and producer for television, including Buffy the Vampire Slayer and Star Trek: The Next Generation, grew up in Ames Michelle Hoover, author, born in Ames Meg Johnson, poet and dancer Fern Kupfer, author Joseph Geha, author Ted Kooser, U.S. Poet Laureate; raised in Ames and ISU graduate John Madson, freelance naturalist of tallgrass prairie ecosystems Sara Paretsky, author of the V.I. Warshawski mysteries; born in Ames in 1947 Jane Smiley, Pulitzer Prize-winning novelist; former instructor at ISU (1981–1996); used ISU as the basis for her novel Moo Neal Stephenson, author, grew up in Ames Hugh Young, coauthor of University Physics textbook Lincoln Peirce, cartoonist/writer of the Big Nate comics and books Other Neva Morris, at her death (2010) second-oldest person in the world and oldest American aged 114 years; lived in Ames her entire life Nate Staniforth, magician Todd Snyder (fashion designer) Politics From 1979 through 2011, Ames was the location of the Ames Straw Poll, which was held every August prior to a presidential election year in which the Republican presidential nomination was undecided (meaning there was no Republican president running for re-election—as in 2011, 2007, 1999, 1995, 1987, and 1979). The poll would gauge support for the various Republican candidates amongst attendees of a fundraising dinner benefiting the Iowa Republican Party. The straw poll was frequently seen by national media and party insiders as a first test of organizational strength in Iowa. In 2015, the straw poll was to be moved to nearby Boone before the Iowa Republican Party eventually decided to cancel it altogether. See also Ames process North Grand Mall Reiman Gardens References External links Official Ames City Website Ames Campustown official site The Main Street Cultural District Cities in Iowa Cities in Story County, Iowa Populated places established in 1864 1864 establishments in Iowa	12
Abalone ( or ; via Spanish , from Rumsen aulón) is a common name for any of a group of small to very large marine gastropod molluscs in the family Haliotidae. Other common names are ear shells, sea ears, and, rarely, muttonfish or muttonshells in parts of Australia, ormer in the UK, perlemoen in South Africa, and paua in New Zealand. Abalones are marine snails. Their taxonomy puts them in the family Haliotidae, which contains only one genus, Haliotis, which once contained six subgenera. These subgenera have become alternative representations of Haliotis. The number of species recognized worldwide ranges between 30 and 130 with over 230 species-level taxa described. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies. The shells of abalones have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre (mother-of-pearl), which in many species is highly iridescent, giving rise to a range of strong, changeable colors which make the shells attractive to humans as decorative objects, jewelry, and as a source of colorful mother-of-pearl. The flesh of abalones is widely considered to be a desirable food, and is consumed raw or cooked by a variety of cultures. Description Most abalone vary in size from (Haliotis pulcherrima) to . The largest species, Haliotis rufescens, reaches . The shell of abalones is convex, rounded to oval in shape, and may be highly arched or very flattened. The shell of the majority of species has a small, flat spire and two to three whorls. The last whorl, known as the body whorl, is auriform, meaning that the shell resembles an ear, giving rise to the common name "ear shell". Haliotis asinina has a somewhat different shape, as it is more elongated and distended. The shell of Haliotis cracherodii cracherodii is also unusual as it has an ovate form, is imperforate, shows an exserted spire, and has prickly ribs. A mantle cleft in the shell impresses a groove in the shell, in which are the row of holes characteristic of the genus. These holes are respiratory apertures for venting water from the gills and for releasing sperm and eggs into the water column. They make up what is known as the selenizone, which forms as the shell grows. This series of eight to 38 holes is near the anterior margin. Only a small number is generally open. The older holes are gradually sealed up as the shell grows and new holes form. Each species has a typical number of open holes, between four and 10, in the selenizone. An abalone has no operculum. The aperture of the shell is very wide and nacreous. The exterior of the shell is striated and dull. The color of the shell is very variable from species to species, which may reflect the animal's diet. The iridescent nacre that lines the inside of the shell varies in color from silvery white, to pink, red and green-red to deep blue, green to purple. The animal has fimbriated head lobes and side lobes that are fimbriated and cirrated. The radula has small median teeth, and the lateral teeth are single and beam-like. They have about 70 uncini, with denticulated hooks, the first four very large. The rounded foot is very large in comparison to most molluscs. The soft body is coiled around the columellar muscle, and its insertion, instead of being on the columella, is on the middle of the inner wall of the shell. The gills are symmetrical and both well developed. These snails cling solidly with their broad, muscular foot to rocky surfaces at sublittoral depths, although some species such as Haliotis cracherodii used to be common in the intertidal zone. Abalones reach maturity at a relatively small size. Their fecundity is high and increases with their size, laying from 10,000 to 11 million eggs at a time. The spermatozoa are filiform and pointed at one end, and the anterior end is a rounded head. Distribution The haliotid family has a worldwide distribution, along the coastal waters of every continent, except the Pacific coast of South America, the Atlantic coast of North America, the Arctic, and Antarctica. The majority of abalone species are found in cold waters, such as off the coasts of New Zealand, South Africa, Australia, Western North America, and Japan. Structure and properties of the shell The shell of the abalone is exceptionally strong and is made of microscopic calcium carbonate tiles stacked like bricks. Between the layers of tiles is a clingy protein substance. When the abalone shell is struck, the tiles slide instead of shattering and the protein stretches to absorb the energy of the blow. Material scientists around the world are studying this tiled structure for insight into stronger ceramic products such as body armor. The dust created by grinding and cutting abalone shell is dangerous; appropriate safeguards must be taken to protect people from inhaling these particles. Diseases and pests Abalones are subject to various diseases. The Victorian Department of Primary Industries said in 2007 that ganglioneuritis killed up to 90% of stock in affected regions. Abalone are also severe hemophiliacs, as their fluids will not clot in the case of a laceration or puncture wound. Members of the Spionidae of the polychaetes are known as pests of abalone. Human use Abalone has been harvested worldwide for centuries as a source of food and decorative items. Abalone shells and associated materials, like their claw-like pearls and nacre, have been used as jewelry and for buttons, buckles, and inlay. These shells have been found in archaeological sites around the world, ranging from 100,000-year-old deposits at Blombos Cave in South Africa to historic Chinese abalone middens on California's Northern Channel Islands. For at least 12,000 years, abalones were harvested to such an extent around the Channel Islands that shells in the area decreased in size four thousand years ago. Farming Farming of abalone began in the late 1950s and early 1960s in Japan and China. Since the mid-1990s, there have been many increasingly successful endeavors to commercially farm abalone for the purpose of consumption. Overfishing and poaching have reduced wild populations to such an extent that farmed abalone now supplies most of the abalone meat consumed. The principal abalone farming regions are China, Taiwan, Japan, and Korea. Abalone is also farmed in Australia, Canada, Chile, France, Iceland, Ireland, Mexico, Namibia, New Zealand, South Africa, Spain, Thailand, and the United States. After trials in 2012, a commercial "sea ranch" was set up in Flinders Bay, Western Australia to raise abalone. The ranch is based on an artificial reef made up of 5,000 separate concrete abalone habitat units, which can host 400 abalone each. The reef is seeded with young abalone from an onshore hatchery. The abalone feed on seaweed that grows naturally on the habitats; the ecosystem enrichment of the bay also results in growing numbers of dhufish, pink snapper, wrasse, and Samson fish among other species. Consumption Abalones have long been a valuable food source for humans in every area of the world where a species is abundant. The meat of this mollusc is considered a delicacy in certain parts of Latin America (particularly Chile), France, New Zealand, East Asia and Southeast Asia. In the Greater China region and among Overseas Chinese communities, abalone is commonly known as bao yu, and sometimes forms part of a Chinese banquet. In the same way as shark fin soup or bird's nest soup, abalone is considered a luxury item, and is traditionally reserved for special occasions such as weddings and other celebrations. As abalone became more popular and less common, the prices adjusted accordingly. In the 1920s, a restaurant-served portion of abalone, about 4 ounces, would cost (in inflation adjusted dollars) about US$7; by 2004, the price had risen to US$75. In the United States, prior to this time, abalone was predominantly eaten, gathered, and prepared by Chinese immigrants. Before that, abalone were collected to be eaten, and used for other purposes by Native American tribes. By 1900, laws were passed in California to outlaw the taking of abalone above the intertidal zone. This forced the Chinese out of the market and the Japanese perfected diving, with or without gear, to enter the market. Abalone started to become popular in the US after the Panama–Pacific International Exposition in 1915, which exhibited 365 varieties of fish with cooking demonstrations, and a 1,300-seat dining hall. In Japan, live and raw abalones are used in awabi sushi, or served steamed, salted, boiled, chopped, or simmered in soy sauce. Salted, fermented abalone entrails are the main component of tottsuru, a local dish from Honshū. Tottsuru is mainly enjoyed with sake. In South Korea, abalone is called Jeonbok (/juhn-bok/) and used in various recipes. Jeonbok porridge and pan-fried abalone steak with butter are popular but also commonly used in soups or ramyeon. In California, abalone meat can be found on pizza, sautéed with caramelized mango, or in steak form dusted with cracker meal and flour. Sport harvesting Australia Tasmania supplies about 25% of the yearly world abalone harvest. Around 12,500 Tasmanians recreationally fish for blacklip and greenlip abalone. For blacklip abalone, the size limit varies between for the southern end of the state and for the northern end of the state. Greenlip abalones have a minimum size of , except for an area around Perkins Bay in the north of the state where the minimum size is . With a recreational abalone licence, the bag limit is 10 per day, with a total possession limit of 20. Scuba diving for abalone is allowed, and has a rich history in Australia. (Scuba diving for abalone in the states of New South Wales and Western Australia is illegal; a free-diving catch limit of two is allowed). Victoria has had an active abalone fishery since the late 1950s. The state is sectioned into three fishing zones, Eastern, Central and Western, with each fisher required a zone-allocated licence. Harvesting is performed by divers using surface-supplied air "hookah" systems operating from runabout-style, outboard-powered boats. While the diver seeks out colonies of abalone amongst the reef beds, the deckhand operates the boat, known as working "live" and stays above where the diver is working. Bags of abalone pried from the rocks are brought to the surface by the diver or by way of "shot line", where the deckhand drops a weighted rope for the catch bag to be connected then retrieved. Divers measure each abalone before removing from the reef and the deckhand remeasures each abalone and removes excess weed growth from the shell. Since 2002, the Victorian industry has seen a significant decline in catches, with the total allowable catch reduced from 1440 to 787 tonnes for the 2011/12 fishing year, due to dwindling stocks and most notably the abalone virus ganglioneuritis, which is fast-spreading and lethal to abalone stocks. United States Sport harvesting of red abalone is permitted with a California fishing license and an abalone stamp card. In 2008, the abalone card also came with a set of 24 tags. This was reduced to 18 abalone per year in 2014, and as of 2017 the limit has been reduced to 12, only nine of which may be taken south of Mendocino County. Legal-size abalone must be tagged immediately. Abalone may only be taken using breath-hold techniques or shorepicking; scuba diving for abalone is strictly prohibited. Taking of abalone is not permitted south of the mouth of San Francisco Bay. A size minimum of measured across the shell is in place. A person may be in possession of only three abalone at any given time. As of 2017, abalone season is May to October, excluding July. Transportation of abalone may only legally occur while the abalone is still attached in the shell. Sale of sport-obtained abalone is illegal, including the shell. Only red abalone may be taken, as black, white, pink, flat, green, and pinto abalone are protected by law. In 2018, The California Fish and Game Commission closed recreational abalone season due to dramatically declining populations. That year, they extended the moratorium to last through April 2021. An abalone diver is normally equipped with a thick wetsuit, including a hood, bootees, and gloves, and usually also a mask, snorkel, weight belt, abalone iron, and abalone gauge. Alternatively, the rock picker can feel underneath rocks at low tides for abalone. Abalone are mostly taken in depths from a few inches up to ; less common are freedivers who can work deeper than . Abalone are normally found on rocks near food sources such as kelp. An abalone iron is used to pry the abalone from the rock before it has time to fully clamp down. Divers dive from boats, kayaks, tube floats, or directly off the shore. The largest abalone recorded in California is , caught by John Pepper somewhere off the coast of San Mateo County in September 1993. The mollusc Concholepas concholepas is often sold in the United States under the name "Chilean abalone", though it is not an abalone, but a muricid. New Zealand In New Zealand, abalone is called paua (, from the Māori language). Haliotis iris (or blackfoot paua) is the ubiquitous New Zealand paua, the highly polished nacre of which is extremely popular as souvenirs with its striking blue, green, and purple iridescence. Haliotis australis and Haliotis virginea are also found in New Zealand waters, but are less popular than H. iris. Like all New Zealand shellfish, recreational harvesting of paua does not require a permit provided catch limits, size restrictions, and seasonal and local restrictions set by the Ministry for Primary Industries (MPI) are followed. The legal recreational daily limit is 10 per diver, with a minimum shell length of for H. iris and for H. australis. In addition, no person may be in possession, even on land, of more than 20 paua or more than of paua meat at any one time. Paua can only be caught by free-diving; it is illegal to catch them using scuba gear. An extensive global black market exists in collecting and exporting abalone meat. This can be a particularly awkward problem where the right to harvest paua can be granted legally under Māori customary rights. When such permits to harvest are abused, it is frequently difficult to police. The limit is strictly enforced by roving Ministry for Primary Industries fishery officers with the backing of the New Zealand Police. Poaching is a major industry in New Zealand with many thousands being taken illegally, often undersized. Convictions have resulted in seizure of diving gear, boats, and motor vehicles and fines and in rare cases, imprisonment. South Africa There are five species endemic to South Africa, namely H. parva, H. spadicea, H. queketti and H. speciosa. The largest abalone in South Africa, Haliotis midae, occurs along roughly two-thirds of the country's coastline. Abalone-diving has been a recreational activity for many years, but stocks are currently being threatened by illegal commercial harvesting. In South Africa, all persons harvesting this shellfish need permits that are issued annually, and no abalone may be harvested using scuba gear. For the last few years, however, no permits have been issued for collecting abalone, but commercial harvesting still continues as does illegal collection by syndicates. In 2007, because of widespread poaching of abalone, the South African government listed abalone as an endangered species according to the CITES section III appendix, which requests member governments to monitor the trade in this species. This listing was removed from CITES in June 2010 by the South African government and South African abalone is no longer subject to CITES trade controls. Export permits are still required, however. The abalone meat from South Africa is prohibited for sale in the country to help reduce poaching; however, much of the illegally harvested meat is sold in Asian countries. As of early 2008, the wholesale price for abalone meat was approximately US$40.00 per kilogram. There is an active trade in the shells, which sell for more than US$1,400 per tonne. Channel Islands, Brittany and Normandy Ormers (Haliotis tuberculata) are considered a delicacy in the British Channel Islands as well as in adjacent areas of France, and are pursued with great alacrity by the locals. This, and a recent lethal bacterial disease, has led to a dramatic depletion in numbers since the latter half of the 19th century, and "ormering" is now strictly regulated to preserve stocks. The gathering of ormers is now restricted to a number of 'ormering tides', from 1 January to 30 April, which occur on the full or new moon and two days following. No ormers may be taken from the beach that are under in shell length. Gatherers are not allowed to wear wetsuits or even put their heads underwater. Any breach of these laws is a criminal offence and can lead to a fine of up to £5,000 or six months in prison. The demand for ormers is such that they led to the world's first underwater arrest, when Mr. Kempthorne-Leigh of Guernsey was arrested by a police officer in full diving gear when illegally diving for ormers. Decorative items The highly iridescent inner nacre layer of the shell of abalone has traditionally been used as a decorative item, in jewelry, buttons, and as inlay in furniture and musical instruments, such as on fret boards and binding of guitars. Indigenous use Abalone has been an important staple in a number of Indigenous cultures around the world, specifically in Africa and on the Northwest American coast. The meat is a traditional food, and the shell is used to make ornaments; historically, the shells were also used as currency in some communities. Threat of extinction Abalones are one of the many classes of organism threatened with extinction due to overfishing and the acidification of oceans from anthropogenic carbon dioxide, as reduced pH erodes their shells. In the 21st century, white, pink, and green abalone are on the United States federal endangered species list, and possible restoration sites have been proposed for the San Clemente Island and Santa Barbara Island areas. The possibility of farming abalone to be reintroduced into the wild has also been proposed, with these abalone having special tags to help track the population. Species The number of species that are recognized within the genus Haliotis has fluctuated over time, and depends on the source that is consulted. The number of recognized species range from 30 to 130. This list finds a compromise using the WoRMS database, plus some species that have been added, for a total of 57. The majority of abalone have not been rated for conservation status. Those that have been reviewed tend to show that the abalone in general is an animal that is declining in numbers, and will need protection throughout the globe. Synonyms See also List of delicacies Citations References Further reading External links Abalone: Species Diversity ABMAP: The Abalone Mapping Project Abalone biology Conchology Hardy's Internet Guide to Marine Gastropods : Shell Catalog book on crafting with Abalone Shell Fisheries Western Australia – Abalone Fact Sheet Imagemap of worldwide abalone distribution Oman’s Abalone Harvest Pro abalone diver, Mallacoota, Victoria (1967) Tathra NSW(1961), Abalone (1963) Fathom magazine "The Abalone Divers" Pages 43,44,45 (1972) Abalone Healing Properties Commercial molluscs Extant Late Cretaceous first appearances Organic gemstones Mollusc common names de:Seeohren ja:アワビ#人間との関わり zh:鮑魚	5
The term abdominal surgery broadly covers surgical procedures that involve opening the abdomen (laparotomy). Surgery of each abdominal organ is dealt with separately in connection with the description of that organ (see stomach, kidney, liver, etc.) Diseases affecting the abdominal cavity are dealt with generally under their own names (e.g. appendicitis). Types The most common abdominal surgeries are described below. Appendectomy: surgical opening of the abdominal cavity and removal of the appendix. Typically performed as definitive treatment for appendicitis, although sometimes the appendix is prophylactically removed incidental to another abdominal procedure. Caesarean section (also known as C-section): a surgical procedure in which one or more incisions are made through a mother's abdomen (laparotomy) and uterus (hysterotomy) to deliver one or more babies, or, rarely, to remove a dead fetus. Inguinal hernia surgery: the repair of an inguinal hernia. Exploratory laparotomy: the opening of the abdominal cavity for direct examination of its contents; for example, to locate a source of bleeding or trauma. It may or may not be followed by repair or removal of the primary problem. Laparoscopy: a minimally invasive approach to abdominal surgery where rigid tubes are inserted through small incisions into the abdominal cavity. The tubes allow introduction of a small camera, surgical instruments, and gases into the cavity for direct or indirect visualization and treatment of the abdomen. The abdomen is inflated with carbon dioxide gas to facilitate visualization and, often, a small video camera is used to show the procedure on a monitor in the operating room. The surgeon manipulates instruments within the abdominal cavity to perform procedures such as cholecystectomy (gallbladder removal), the most common laparoscopic procedure. The laparoscopic method speeds recovery time and reduces blood loss and infection as compared to the traditional "open" method. Complications Complications of abdominal surgery include, but are not limited to: Adhesions (also called scar tissue): complications of postoperative adhesion formation are frequent, they have a large negative effect on patients’ health, and increase workload in clinical practice Bleeding Infection Paralytic ileus: short-term paralysis of the bowel Perioperative mortality, any death occurring within 30 days after surgery Shock Sterile technique, aseptic post-operative care, antibiotics, use of the WHO Surgical Safety Checklist, and vigilant post-operative monitoring greatly reduce the risk of these complications. Planned surgery performed under sterile conditions is much less risky than that performed under emergency or unsterile conditions. The contents of the bowel are unsterile, and thus leakage of bowel contents, as from trauma, substantially increases the risk of infection. Globally, there are few studies comparing perioperative mortality following abdominal surgery across different health systems. One major prospective study of 10,745 adult patients undergoing emergency laparotomy from 357 centres in 58 high-, middle-, and low-income countries found that mortality is three times higher in low- compared with high-HDI countries even when adjusted for prognostic factors. In this study the overall global mortality rate was 1.6 percent at 24 hours (high 1.1 percent, middle 1.9 percent, low 3.4 percent), increasing to 5.4 percent by 30 days (high 4.5 percent, middle 6.0 percent, low 8.6 percent). Of the 578 patients who died, 404 (69.9 percent) did so between 24 hours and 30 days following surgery (high 74.2 percent, middle 68.8 percent, low 60.5 percent). Patient safety factors were suggested to play an important role, with use of the WHO Surgical Safety Checklist associated with reduced mortality at 30 days. Taking a similar approach, a unique global study of 1,409 children undergoing emergency laparotomy from 253 centres in 43 countries showed that adjusted mortality in children following surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries, translating to 40 excess deaths per 1,000 procedures performed in these settings. Internationally, the most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23)) and middle-HDI (4.42 (1.44 to 13.56)) countries compared with high-HDI countries. Absorption of drugs administered orally was shown to be significantly affected following abdominal surgery. There is low-certainty evidence that there is no difference between using scalpel and electrosurgery in infection rates during major abdominal surgeries. See also Abdominoplasty ASA physical status classification system or perioperative physical fitness Diabetes General surgery Laparotomy Low-fiber/low-residue diet Perioperative mortality References Surgical specialties General surgery	5
The Alan Parsons Project were a British rock band active between 1975 and 1990, whose core membership consisted of producer, audio engineer, musician and composer Alan Parsons and singer, songwriter and pianist Eric Woolfson. They were accompanied by varying session musicians and some relatively consistent session players such as guitarist Ian Bairnson, arranger Andrew Powell, bassist and vocalist David Paton, drummer Stuart Elliott, and vocalists Lenny Zakatek and Chris Rainbow. Parsons and Woolfson shared writing credits on almost all of the Project's songs, with Parsons producing or co-producing all of the band's recordings. The Alan Parsons Project released eleven studio albums in its 15-year career, the most successful being I Robot (1977) and Eye in the Sky (1982). Many of their albums are conceptual in nature and focus on science fiction, supernatural, literary and sociological themes. Among the group's most popular songs are "I Wouldn't Want to Be Like You", "Games People Play", "Time", "Sirius"/"Eye in the Sky" and "Don't Answer Me". Career 1974–1976: Formation and debut Alan Parsons met Eric Woolfson in the canteen of Abbey Road Studios in the summer of 1974. Parsons was Assistant Engineer on the Beatles' albums Abbey Road (1969) and Let It Be (1970), engineered Pink Floyd's The Dark Side of the Moon (1973), and produced several acts for EMI Records. Woolfson, a songwriter and composer, was working as a session pianist while composing material for a concept album based on the work of Edgar Allan Poe. Woolfson's idea was to manage Alan and help his already successful production career. This was the start of their longstanding friendly business relationship. He managed Parsons' career as a producer and engineer through a string of successes, including Pilot, Steve Harley, Cockney Rebel, John Miles, Al Stewart, Ambrosia, and the Hollies. Woolfson came up with the idea of making an album based on developments in the film industry—the focal point of the films' promotion shifted from film stars to directors such as Alfred Hitchcock and Stanley Kubrick. If the film industry was becoming a director's medium, Woolfson felt the music business might well become a producer's medium. Recalling his earlier Edgar Allan Poe material, Woolfson saw a way to combine his and Parsons's talents. Parsons produced and engineered songs written and composed by the two, and the first Alan Parsons Project was begun. The Project's first album, Tales of Mystery and Imagination (1976), released by 20th Century Fox Records and including major contributions by all members of Pilot and Ambrosia, was a success, reaching the Top 40 in the US Billboard 200 chart. The song "The Raven" featured lead vocals by the actor Leonard Whiting. According to the 2007 re-mastered album liner notes, this was the first rock song to use a vocoder, with Alan Parsons speaking lyrics through it, although others such as Bruce Haack pioneered this field in the previous decade. 1977–1990: Mainstream success and final releases Arista Records then signed the Alan Parsons Project for further albums. Through the late 1970s and early 1980s, the Project's popularity continued to grow. However, the Project was always more popular in North America, Ibero-America, and Continental Europe than in Parsons' home country, never achieving a UK Top 40 single or Top 20 album. The singles "I Wouldn't Want to Be Like You", "Games People Play", "Damned If I Do", "Time" (the first single to feature Woolfson's lead vocal) and "Eye in the Sky" had a notable impact on the Billboard Hot 100. "Don't Answer Me" became the Project's last successful single in the United States; it reached the top 15 on the American charts in 1984. After those successes, however, the Project began to fade from view. There were fewer hit singles, and declining album sales. 1987's Gaudi was the Project's final release, though it had planned to record an album called Freudiana (1990) next. The musical Freudiana Even though the studio version of Freudiana was produced by Parsons (and featured the regular Project session musicians, making it an 'unofficial' Project album), it was primarily Woolfson's idea to turn it into a musical. While Parsons pursued his own solo career and took many session players of the Project on the road for the first time in a successful worldwide tour, Woolfson went on to produce musical plays influenced by the Project's music. Freudiana, Gaudi, and Gambler were three musicals that included some Project songs like "Eye in the Sky", "Time", "Inside Looking Out", and "Limelight". The live music from Gambler was only distributed at the performance site in Mönchengladbach, Germany. The Sicilian Defence In 1979, Parsons, Woolfson, and their record label Arista, had been stalled in contract renegotiations when the two submitted an all-instrumental album tentatively titled The Sicilian Defence, named after an aggressive opening move in chess, arguably to get out of their recording contract. Arista's refusal to release the album had two known effects: the negotiations led to a renewed contract, and the album was not released at that time. In interviews he gave before his death in 2009, Woolfson said he planned to release one track from the "Sicilian" album, which in 2008 appeared as a bonus track on a CD re-issue of the Eve album. Sometime later, after he had relocated the original tapes, Parsons reluctantly agreed to release the album and announced that it would finally be released on an upcoming Project box set called The Complete Albums Collection in 2014 for the first time as a bonus disc. Parsons' and Woolfson's solo careers Parsons released titles under his name; these were Try Anything Once (1993), On Air (1996), The Time Machine (1999), A Valid Path (2004) and The Secret (2019). Meanwhile, Woolfson made concept albums titled Freudiana (1990), about Sigmund Freud's work on psychology, and Poe: More Tales of Mystery and Imagination (2003); this continued from the Alan Parsons Project's first album about Edgar Allan Poe's literature. Tales of Mystery and Imagination (1976) was re-mixed in 1987 for release on CD, and included narration by Orson Welles recorded in 1975, but delivered too late to be included on the original album. For the 2007 deluxe edition release, parts of this tape were used for the 1976 Griffith Park Planetarium launch of the original album, the 1987 remix, and various radio spots. All were included as bonus material. Sound The band's sound is described as progressive rock, art rock, progressive pop, and soft rock. "Sirius" is their best-known and most-frequently heard of all Parsons/Woolfson songs. It was used as entrance music by various American sports teams, notably by the Chicago Bulls during their 1990s NBA dynasty. It was also used as the entrance theme for Ricky Steamboat in pro wrestling of the mid-1980s. In addition, "Sirius" is played in a variety of TV shows and movies including the BBC series Record Breakers, the episode "Vanishing Act" of The Adventures of Jimmy Neutron: Boy Genius and the 2009 film Cloudy with a Chance of Meatballs. Vocal duties were shared by guests to complement each song. In later years, Woolfson sang lead on many of the group's hits, including "Time", "Eye in the Sky", and "Don't Answer Me". The record company pressured Parsons to use Woolfson more, but Parsons preferred to use polished proficient singers; Woolfson admitted he was not in that category. In addition to Woolfson, vocalists Chris Rainbow, Lenny Zakatek, John Miles, David Paton, and Colin Blunstone are regulars. Other singers, such as Arthur Brown, Steve Harley, Gary Brooker, Dave Terry a.k.a. Elmer Gantry, Vitamin Z's Geoff Barradale, and Marmalade's Dean Ford, recorded only once or twice with the Project. Parsons sang lead on one song ("The Raven") through a vocoder and backing on a few others, including "To One in Paradise". Both of those songs appeared on Tales of Mystery and Imagination (1976). Parsons also sings a prominent counter melody on “Time”. A variety of session musicians worked with the Alan Parsons Project regularly, contributing to the recognizable style of a song despite the varied singer line-up. With Parsons and Woolfson, the studio band consisted of the group Pilot, with Ian Bairnson (guitar), David Paton (bass) and Stuart Tosh (drums). Pilot's keyboardist Billy Lyall contributed. From Pyramid (1978) onward, Tosh was replaced by Stuart Elliott of Cockney Rebel. Bairnson played on all albums, and Paton stayed almost until the end. Andrew Powell appeared as arranger of orchestra (and often choirs) on all albums except Vulture Culture (1985); he was composing the score of Richard Donner's film Ladyhawke (1985). This score was partly in the APP style, recorded by most of the APP regulars, and produced and engineered by Parsons. Powell composed some material for the first two Project albums. For Vulture Culture and later, Richard Cottle played as a regular contributor on synthesizers and saxophone. The Alan Parsons Project played live only once under that name during its original incarnation because Woolfson and Parsons held the roles of writing and production, and because of the technical difficulties of re-producing on stage the complex instrumentation used in the studio. In the 1990s, musical production evolved with the technology of digital samplers. The one occasion the band was introduced as 'The Alan Parsons Project' in a live performance was at The Night of the Proms in October 1990. The concerts featured all Project regulars except Woolfson, present behind the scenes, while Parsons stayed at the mixer except for the last song, when he played acoustic guitar. Since 1993, Alan Parsons continues to perform live as the Alan Parsons Live Project to be distinct from The Alan Parsons Project. The current line up consists of lead singer P.J. Olsson, guitarist Jeffrey Kollman, drummer Danny Thompson, keyboardist Tom Brooks, bass guitarist Guy Erez, vocalist and saxophonist Todd Cooper, and guitarist and vocalist Dan Tracey. In 2013, Alan Parsons Live Project played Colombia with a full choir and orchestra (the Medellin Philharmonic) as 'Alan Parsons Symphonic Project'. A 2-CD live set and a DVD version of this concert were released in May 2016. In Popular Culture In Austin Powers: The Spy Who Shagged Me Dr. Evil devised a plan to turn the moon into a "Death Star" using a "laser" invented by Dr. Alan Parsons. He called this "The Alan Parsons Project". Members Official members Alan Parsons – production, engineering, programming, composition, vocals, keyboards, guitars (1975–1990) Eric Woolfson – composition, lyrics, piano, keyboards, vocals, executive production (1975–1990; died 2009) Notable contributors Andrew Powell – composition, keyboards, orchestral arrangements (1975–1996) Philharmonia Orchestra Ian Bairnson – guitars (1975–1990; died 2023) David Pack – guitars (1976, 1993), vocals, keyboards (1993) Richard Cottle – keyboards, saxophone (1984–1990) David Paton – bass (1975–1986), vocals (1975–1986, 1990), acoustic guitar (1990) Stuart Tosh – drums, percussion (1975–1977) Stuart Elliott – drums, percussion (1977–1990) Mel Collins – saxophone (1982–1984) Geoff Barradale – vocals (1987) Phil Kenzie – saxophone (1978) Andy Kanavan - percussion (1993) Dennis Clarke – saxophone (1980) Colin Blunstone – vocals (1978–1984) Gary Brooker – vocals (1985; died 2022) Arthur Brown – vocals (1975) Lesley Duncan – vocals (1979; died 2010) Graham Dye – vocals (1985, 1998) Dean Ford – vocals (1978; died 2018) Dave Terry ("Elmer Gantry") – vocals (1980, 1982) Jack Harris – vocals (1976–1978) The Hollies – vocals John Miles – vocals (1976, 1978, 1985, 1987, 1990; died 2021) Chris Rainbow – vocals (1979–1990; died 2015) Eric Stewart – vocals (1990, 1993) Peter Straker – vocals (1977) Clare Torry – vocals (1979) Dave Townsend – vocals (1977, 1979) Lenny Zakatek – vocals (1977–1987) The English Chorale – choir (1976, 1977, 1982, 1987) Discography Tales of Mystery and Imagination (1976) I Robot (1977) Pyramid (1978) Eve (1979) The Turn of a Friendly Card (1980) Eye in the Sky (1982) Ammonia Avenue (1984) Vulture Culture (1985) Stereotomy (1985) Gaudi (1987) Freudiana (1990 – Austrian Original Cast Musical Soundtrack, virtually a solo Woolfson project) The Sicilian Defence (2014, recorded in 1979) Related The Philharmonia Orchestra Plays the Best of the Alan Parsons Project (1983 – orchestral album by Andrew Powell) Ladyhawke (1985 – soundtrack by Powell, produced and engineered by Parsons) References External links www.The-Alan-Parsons-Project.com The official Eric Woolfson website The Alan Parsons Project albums to be listened as stream at Spotify.com British progressive rock groups British soft rock music groups Arista Records artists Charisma Records artists Progressive pop musicians Soft rock duos Male musical duos	7
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal. Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms. Minuscule numbers of antiparticles can be generated at particle accelerators; however, total artificial production has been only a few nanograms. No macroscopic amount of antimatter has ever been assembled due to the extreme cost and difficulty of production and handling. Nonetheless, antimatter is an essential component of widely-available applications related to beta decay, such as positron emission tomography, radiation therapy, and industrial imaging. In theory, a particle and its antiparticle (for example, a proton and an antiproton) have the same mass, but opposite electric charge, and other differences in quantum numbers. A collision between any particle and its anti-particle partner leads to their mutual annihilation, giving rise to various proportions of intense photons (gamma rays), neutrinos, and sometimes less-massive particleantiparticle pairs. The majority of the total energy of annihilation emerges in the form of ionizing radiation. If surrounding matter is present, the energy content of this radiation will be absorbed and converted into other forms of energy, such as heat or light. The amount of energy released is usually proportional to the total mass of the collided matter and antimatter, in accordance with the notable mass–energy equivalence equation, . Antiparticles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom. The nuclei of antihelium have been artificially produced, albeit with difficulty, and are the most complex anti-nuclei so far observed. Physical principles indicate that complex antimatter atomic nuclei are possible, as well as anti-atoms corresponding to the known chemical elements. There is strong evidence that the observable universe is composed almost entirely of ordinary matter, as opposed to an equal mixture of matter and antimatter. This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics. The process by which this inequality between matter and antimatter particles developed is called baryogenesis. Definitions Antimatter particles carry the same charge as matter particles, but of opposite sign. That is, an antiproton is negatively charged and an antielectron (positron) is positively charged. Neutrons do not carry a net charge, but their constituent quarks do. Protons and neutrons have a baryon number of +1, while antiprotons and antineutrons have a baryon number of –1. Similarly, electrons have a lepton number of +1, while that of positrons is –1. When a particle and its corresponding antiparticle collide, they are both converted into energy. The French term contra-terrene led to the initialism "C.T." and the science fiction term "seetee", as used in such novels as Seetee Ship. Conceptual history The idea of negative matter appears in past theories of matter that have now been abandoned. Using the once popular vortex theory of gravity, the possibility of matter with negative gravity was discussed by William Hicks in the 1880s. Between the 1880s and the 1890s, Karl Pearson proposed the existence of "squirts" and sinks of the flow of aether. The squirts represented normal matter and the sinks represented negative matter. Pearson's theory required a fourth dimension for the aether to flow from and into. The term antimatter was first used by Arthur Schuster in two rather whimsical letters to Nature in 1898, in which he coined the term. He hypothesized antiatoms, as well as whole antimatter solar systems, and discussed the possibility of matter and antimatter annihilating each other. Schuster's ideas were not a serious theoretical proposal, merely speculation, and like the previous ideas, differed from the modern concept of antimatter in that it possessed negative gravity. The modern theory of antimatter began in 1928, with a paper by Paul Dirac. Dirac realised that his relativistic version of the Schrödinger wave equation for electrons predicted the possibility of antielectrons. Although Dirac had laid the groundwork for the existence of these “antielectrons” he initially failed to pick up on the implications contained within his own equation. He freely gave the credit for that insight to J. Robert Oppenheimer, whose seminal paper “On the Theory of Electrons and Protons” (Feb 14th 1930) drew on Dirac’s equation and argued for the existence of a positively charged electron (a positron), which as a counterpart to the electron should have the same mass as the electron itself. This meant that it could not be, as Dirac had in fact suggested, a proton. Dirac further postulated the existence of antimatter in a 1931 paper which referred to the positron as an "anti-electron". These were discovered by Carl D. Anderson in 1932 and named positrons from "positive electron". Although Dirac did not himself use the term antimatter, its use follows on naturally enough from antielectrons, antiprotons, etc. A complete periodic table of antimatter was envisaged by Charles Janet in 1929. The Feynman–Stueckelberg interpretation states that antimatter and antiparticles are regular particles traveling backward in time. Notation One way to denote an antiparticle is by adding a bar over the particle's symbol. For example, the proton and antiproton are denoted as and , respectively. The same rule applies if one were to address a particle by its constituent components. A proton is made up of quarks, so an antiproton must therefore be formed from antiquarks. Another convention is to distinguish particles by positive and negative electric charge. Thus, the electron and positron are denoted simply as and respectively. To prevent confusion, however, the two conventions are never mixed. Properties Theorized anti-gravitational properties of antimatter are currently being tested at the AEGIS and ALPHA-g experiments at CERN. Research is needed to study the possible gravitational effects between matter and antimatter, and between antimatter and antimatter. However, research is difficult considering when the two meet they annihilate, along with the current difficulties of capturing and containing antimatter. There are compelling theoretical reasons to believe that, aside from the fact that antiparticles have different signs on all charges (such as electric and baryon charges), matter and antimatter have exactly the same properties. This means a particle and its corresponding antiparticle must have identical masses and decay lifetimes (if unstable). It also implies that, for example, a star made up of antimatter (an "antistar") will shine just like an ordinary star. This idea was tested experimentally in 2016 by the ALPHA experiment, which measured the transition between the two lowest energy states of antihydrogen. The results, which are identical to that of hydrogen, confirmed the validity of quantum mechanics for antimatter. On 27 September 2023, physicists reported studies which support the notion that antimatter particles behave in a similar way as normal matter in a gravitational field. Origin and asymmetry Most matter observable from the Earth seems to be made of matter rather than antimatter. If antimatter-dominated regions of space existed, the gamma rays produced in annihilation reactions along the boundary between matter and antimatter regions would be detectable. Antiparticles are created everywhere in the universe where high-energy particle collisions take place. High-energy cosmic rays striking Earth's atmosphere (or any other matter in the Solar System) produce minute quantities of antiparticles in the resulting particle jets, which are immediately annihilated by contact with nearby matter. They may similarly be produced in regions like the center of the Milky Way and other galaxies, where very energetic celestial events occur (principally the interaction of relativistic jets with the interstellar medium). The presence of the resulting antimatter is detectable by the two gamma rays produced every time positrons annihilate with nearby matter. The frequency and wavelength of the gamma rays indicate that each carries 511 keV of energy (that is, the rest mass of an electron multiplied by c2). Observations by the European Space Agency's INTEGRAL satellite may explain the origin of a giant antimatter cloud surrounding the Galactic Center. The observations show that the cloud is asymmetrical and matches the pattern of X-ray binaries (binary star systems containing black holes or neutron stars), mostly on one side of the Galactic Center. While the mechanism is not fully understood, it is likely to involve the production of electron–positron pairs, as ordinary matter gains kinetic energy while falling into a stellar remnant. Antimatter may exist in relatively large amounts in far-away galaxies due to cosmic inflation in the primordial time of the universe. Antimatter galaxies, if they exist, are expected to have the same chemistry and absorption and emission spectra as normal-matter galaxies, and their astronomical objects would be observationally identical, making them difficult to distinguish. NASA is trying to determine if such galaxies exist by looking for X-ray and gamma ray signatures of annihilation events in colliding superclusters. In October 2017, scientists working on the BASE experiment at CERN reported a measurement of the antiproton magnetic moment to a precision of 1.5 parts per billion. It is consistent with the most precise measurement of the proton magnetic moment (also made by BASE in 2014), which supports the hypothesis of CPT symmetry. This measurement represents the first time that a property of antimatter is known more precisely than the equivalent property in matter. Antimatter quantum interferometry has been first demonstrated in 2018 in the Positron Laboratory (L-NESS) of Rafael Ferragut in Como (Italy), by a group led by Marco Giammarchi. Natural production Positrons are produced naturally in β+ decays of naturally occurring radioactive isotopes (for example, potassium-40) and in interactions of gamma quanta (emitted by radioactive nuclei) with matter. Antineutrinos are another kind of antiparticle created by natural radioactivity (β− decay). Many different kinds of antiparticles are also produced by (and contained in) cosmic rays. In January 2011, research by the American Astronomical Society discovered antimatter (positrons) originating above thunderstorm clouds; positrons are produced in terrestrial gamma ray flashes created by electrons accelerated by strong electric fields in the clouds. Antiprotons have also been found to exist in the Van Allen Belts around the Earth by the PAMELA module. Antiparticles are also produced in any environment with a sufficiently high temperature (mean particle energy greater than the pair production threshold). It is hypothesized that during the period of baryogenesis, when the universe was extremely hot and dense, matter and antimatter were continually produced and annihilated. The presence of remaining matter, and absence of detectable remaining antimatter, is called baryon asymmetry. The exact mechanism that produced this asymmetry during baryogenesis remains an unsolved problem. One of the necessary conditions for this asymmetry is the violation of CP symmetry, which has been experimentally observed in the weak interaction. Recent observations indicate black holes and neutron stars produce vast amounts of positron-electron plasma via the jets. Observation in cosmic rays Satellite experiments have found evidence of positrons and a few antiprotons in primary cosmic rays, amounting to less than 1% of the particles in primary cosmic rays. This antimatter cannot all have been created in the Big Bang, but is instead attributed to have been produced by cyclic processes at high energies. For instance, electron-positron pairs may be formed in pulsars, as a magnetized neutron star rotation cycle shears electron-positron pairs from the star surface. Therein the antimatter forms a wind that crashes upon the ejecta of the progenitor supernovae. This weathering takes place as "the cold, magnetized relativistic wind launched by the star hits the non-relativistically expanding ejecta, a shock wave system forms in the impact: the outer one propagates in the ejecta, while a reverse shock propagates back towards the star." The former ejection of matter in the outer shock wave and the latter production of antimatter in the reverse shock wave are steps in a space weather cycle. Preliminary results from the presently operating Alpha Magnetic Spectrometer (AMS-02) on board the International Space Station show that positrons in the cosmic rays arrive with no directionality, and with energies that range from 10 GeV to 250 GeV. In September, 2014, new results with almost twice as much data were presented in a talk at CERN and published in Physical Review Letters. A new measurement of positron fraction up to 500 GeV was reported, showing that positron fraction peaks at a maximum of about 16% of total electron+positron events, around an energy of 275 ± 32 GeV. At higher energies, up to 500 GeV, the ratio of positrons to electrons begins to fall again. The absolute flux of positrons also begins to fall before 500 GeV, but peaks at energies far higher than electron energies, which peak about 10 GeV. These results on interpretation have been suggested to be due to positron production in annihilation events of massive dark matter particles. Cosmic ray antiprotons also have a much higher energy than their normal-matter counterparts (protons). They arrive at Earth with a characteristic energy maximum of 2 GeV, indicating their production in a fundamentally different process from cosmic ray protons, which on average have only one-sixth of the energy. There is an ongoing search for larger antimatter nuclei, such as antihelium nuclei (that is, anti-alpha particles), in cosmic rays. The detection of natural antihelium could imply the existence of large antimatter structures such as an antistar. A prototype of the AMS-02 designated AMS-01, was flown into space aboard the on STS-91 in June 1998. By not detecting any antihelium at all, the AMS-01 established an upper limit of 1.1×10−6 for the antihelium to helium flux ratio. AMS-02 revealed in December 2016 that it had discovered a few signals consistent with antihelium nuclei amidst several billion helium nuclei. The result remains to be verified, and the team is currently trying to rule out contamination. Artificial production Positrons Positrons were reported in November 2008 to have been generated by Lawrence Livermore National Laboratory in larger numbers than by any previous synthetic process. A laser drove electrons through a gold target's nuclei, which caused the incoming electrons to emit energy quanta that decayed into both matter and antimatter. Positrons were detected at a higher rate and in greater density than ever previously detected in a laboratory. Previous experiments made smaller quantities of positrons using lasers and paper-thin targets; newer simulations showed that short bursts of ultra-intense lasers and millimeter-thick gold are a far more effective source. Antiprotons, antineutrons, and antinuclei The existence of the antiproton was experimentally confirmed in 1955 by University of California, Berkeley physicists Emilio Segrè and Owen Chamberlain, for which they were awarded the 1959 Nobel Prize in Physics. An antiproton consists of two up antiquarks and one down antiquark (). The properties of the antiproton that have been measured all match the corresponding properties of the proton, with the exception of the antiproton having opposite electric charge and magnetic moment from the proton. Shortly afterwards, in 1956, the antineutron was discovered in proton–proton collisions at the Bevatron (Lawrence Berkeley National Laboratory) by Bruce Cork and colleagues. In addition to antibaryons, anti-nuclei consisting of multiple bound antiprotons and antineutrons have been created. These are typically produced at energies far too high to form antimatter atoms (with bound positrons in place of electrons). In 1965, a group of researchers led by Antonino Zichichi reported production of nuclei of antideuterium at the Proton Synchrotron at CERN. At roughly the same time, observations of antideuterium nuclei were reported by a group of American physicists at the Alternating Gradient Synchrotron at Brookhaven National Laboratory. Antihydrogen atoms In 1995, CERN announced that it had successfully brought into existence nine hot antihydrogen atoms by implementing the SLAC/Fermilab concept during the PS210 experiment. The experiment was performed using the Low Energy Antiproton Ring (LEAR), and was led by Walter Oelert and Mario Macri. Fermilab soon confirmed the CERN findings by producing approximately 100 antihydrogen atoms at their facilities. The antihydrogen atoms created during PS210 and subsequent experiments (at both CERN and Fermilab) were extremely energetic and were not well suited to study. To resolve this hurdle, and to gain a better understanding of antihydrogen, two collaborations were formed in the late 1990s, namely, ATHENA and ATRAP. In 1999, CERN activated the Antiproton Decelerator, a device capable of decelerating antiprotons from to – still too "hot" to produce study-effective antihydrogen, but a huge leap forward. In late 2002 the ATHENA project announced that they had created the world's first "cold" antihydrogen. The ATRAP project released similar results very shortly thereafter. The antiprotons used in these experiments were cooled by decelerating them with the Antiproton Decelerator, passing them through a thin sheet of foil, and finally capturing them in a Penning–Malmberg trap. The overall cooling process is workable, but highly inefficient; approximately 25 million antiprotons leave the Antiproton Decelerator and roughly 25,000 make it to the Penning–Malmberg trap, which is about or 0.1% of the original amount. The antiprotons are still hot when initially trapped. To cool them further, they are mixed into an electron plasma. The electrons in this plasma cool via cyclotron radiation, and then sympathetically cool the antiprotons via Coulomb collisions. Eventually, the electrons are removed by the application of short-duration electric fields, leaving the antiprotons with energies less than . While the antiprotons are being cooled in the first trap, a small cloud of positrons is captured from radioactive sodium in a Surko-style positron accumulator. This cloud is then recaptured in a second trap near the antiprotons. Manipulations of the trap electrodes then tip the antiprotons into the positron plasma, where some combine with antiprotons to form antihydrogen. This neutral antihydrogen is unaffected by the electric and magnetic fields used to trap the charged positrons and antiprotons, and within a few microseconds the antihydrogen hits the trap walls, where it annihilates. Some hundreds of millions of antihydrogen atoms have been made in this fashion. In 2005, ATHENA disbanded and some of the former members (along with others) formed the ALPHA Collaboration, which is also based at CERN. The ultimate goal of this endeavour is to test CPT symmetry through comparison of the atomic spectra of hydrogen and antihydrogen (see hydrogen spectral series). Most of the sought-after high-precision tests of the properties of antihydrogen could only be performed if the antihydrogen were trapped, that is, held in place for a relatively long time. While antihydrogen atoms are electrically neutral, the spins of their component particles produce a magnetic moment. These magnetic moments can interact with an inhomogeneous magnetic field; some of the antihydrogen atoms can be attracted to a magnetic minimum. Such a minimum can be created by a combination of mirror and multipole fields. Antihydrogen can be trapped in such a magnetic minimum (minimum-B) trap; in November 2010, the ALPHA collaboration announced that they had so trapped 38 antihydrogen atoms for about a sixth of a second. This was the first time that neutral antimatter had been trapped. On 26 April 2011, ALPHA announced that they had trapped 309 antihydrogen atoms, some for as long as 1,000 seconds (about 17 minutes). This was longer than neutral antimatter had ever been trapped before. ALPHA has used these trapped atoms to initiate research into the spectral properties of the antihydrogen. In 2016, a new antiproton decelerator and cooler called ELENA (Extra Low ENergy Antiproton decelerator) was built. It takes the antiprotons from the antiproton decelerator and cools them to 90 keV, which is "cold" enough to study. This machine works by using high energy and accelerating the particles within the chamber. More than one hundred antiprotons can be captured per second, a huge improvement, but it would still take several thousand years to make a nanogram of antimatter. The biggest limiting factor in the large-scale production of antimatter is the availability of antiprotons. Recent data released by CERN states that, when fully operational, their facilities are capable of producing ten million antiprotons per minute. Assuming a 100% conversion of antiprotons to antihydrogen, it would take 100 billion years to produce 1 gram or 1 mole of antihydrogen (approximately atoms of anti-hydrogen). However, CERN only produces 1% of the anti-matter Fermilab does, and neither are designed to produce anti-matter. According to Gerald Jackson, using technology already in use today we are capable of producing and capturing 20 grams of anti-matter particles per year at a yearly cost of 670 million dollars per facility. Antihelium Antihelium-3 nuclei () were first observed in the 1970s in proton–nucleus collision experiments at the Institute for High Energy Physics by Y. Prockoshkin's group (Protvino near Moscow, USSR) and later created in nucleus–nucleus collision experiments. Nucleus–nucleus collisions produce antinuclei through the coalescence of antiprotons and antineutrons created in these reactions. In 2011, the STAR detector reported the observation of artificially created antihelium-4 nuclei (anti-alpha particles) () from such collisions. The Alpha Magnetic Spectrometer on the International Space Station has, as of 2021, recorded eight events that seem to indicate the detection of antihelium-3. Preservation Antimatter cannot be stored in a container made of ordinary matter because antimatter reacts with any matter it touches, annihilating itself and an equal amount of the container. Antimatter in the form of charged particles can be contained by a combination of electric and magnetic fields, in a device called a Penning trap. This device cannot, however, contain antimatter that consists of uncharged particles, for which atomic traps are used. In particular, such a trap may use the dipole moment (electric or magnetic) of the trapped particles. At high vacuum, the matter or antimatter particles can be trapped and cooled with slightly off-resonant laser radiation using a magneto-optical trap or magnetic trap. Small particles can also be suspended with optical tweezers, using a highly focused laser beam. In 2011, CERN scientists were able to preserve antihydrogen for approximately 17 minutes. The record for storing antiparticles is currently held by the TRAP experiment at CERN: antiprotons were kept in a Penning trap for 405 days. A proposal was made in 2018 to develop containment technology advanced enough to contain a billion anti-protons in a portable device to be driven to another lab for further experimentation. Cost Scientists claim that antimatter is the costliest material to make. In 2006, Gerald Smith estimated $250 million could produce 10 milligrams of positrons (equivalent to $25 billion per gram); in 1999, NASA gave a figure of $62.5 trillion per gram of antihydrogen. This is because production is difficult (only very few antiprotons are produced in reactions in particle accelerators) and because there is higher demand for other uses of particle accelerators. According to CERN, it has cost a few hundred million Swiss francs to produce about 1 billionth of a gram (the amount used so far for particle/antiparticle collisions). In comparison, to produce the first atomic weapon, the cost of the Manhattan Project was estimated at $23 billion with inflation during 2007. Several studies funded by the NASA Institute for Advanced Concepts are exploring whether it might be possible to use magnetic scoops to collect the antimatter that occurs naturally in the Van Allen belt of the Earth, and ultimately, the belts of gas giants, like Jupiter, hopefully at a lower cost per gram. Uses Medical Matter–antimatter reactions have practical applications in medical imaging, such as positron emission tomography (PET). In positive beta decay, a nuclide loses surplus positive charge by emitting a positron (in the same event, a proton becomes a neutron, and a neutrino is also emitted). Nuclides with surplus positive charge are easily made in a cyclotron and are widely generated for medical use. Antiprotons have also been shown within laboratory experiments to have the potential to treat certain cancers, in a similar method currently used for ion (proton) therapy. Fuel Isolated and stored antimatter could be used as a fuel for interplanetary or interstellar travel as part of an antimatter-catalyzed nuclear pulse propulsion or another antimatter rocket. Since the energy density of antimatter is higher than that of conventional fuels, an antimatter-fueled spacecraft would have a higher thrust-to-weight ratio than a conventional spacecraft. If matter–antimatter collisions resulted only in photon emission, the entire rest mass of the particles would be converted to kinetic energy. The energy per unit mass () is about 10 orders of magnitude greater than chemical energies, and about 3 orders of magnitude greater than the nuclear potential energy that can be liberated, today, using nuclear fission (about per fission reaction or ), and about 2 orders of magnitude greater than the best possible results expected from fusion (about for the proton–proton chain). The reaction of of antimatter with of matter would produce (180 petajoules) of energy (by the mass–energy equivalence formula, ), or the rough equivalent of 43 megatons of TNT – slightly less than the yield of the 27,000 kg Tsar Bomba, the largest thermonuclear weapon ever detonated. Not all of that energy can be utilized by any realistic propulsion technology because of the nature of the annihilation products. While electron–positron reactions result in gamma ray photons, these are difficult to direct and use for thrust. In reactions between protons and antiprotons, their energy is converted largely into relativistic neutral and charged pions. The neutral pions decay almost immediately (with a lifetime of 85 attoseconds) into high-energy photons, but the charged pions decay more slowly (with a lifetime of 26 nanoseconds) and can be deflected magnetically to produce thrust. Charged pions ultimately decay into a combination of neutrinos (carrying about 22% of the energy of the charged pions) and unstable charged muons (carrying about 78% of the charged pion energy), with the muons then decaying into a combination of electrons, positrons and neutrinos (cf. muon decay; the neutrinos from this decay carry about 2/3 of the energy of the muons, meaning that from the original charged pions, the total fraction of their energy converted to neutrinos by one route or another would be about ). Weapons Antimatter has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there is no evidence that it will ever be feasible. Nonetheless, the U.S. Air Force funded studies of the physics of antimatter in the Cold War, and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. See also References Further reading External links Freeview Video 'Antimatter' by the Vega Science Trust and the BBC/OU CERN Webcasts (RealPlayer required) What is Antimatter? (from the Frequently Asked Questions at the Center for Antimatter–Matter Studies) FAQ from CERN with information about antimatter aimed at the general reader, posted in response to antimatter's fictional portrayal in Angels & Demons Antimatter at Angels and Demons, CERN What is direct CP-violation? Animated illustration of antihydrogen production at CERN from the Exploratorium. Quantum field theory Fictional power sources Articles containing video clips	5
Casa Milà (, ), popularly known as La Pedrera (, ; "the stone quarry") in reference to its unconventional rough-hewn appearance, is a Modernista building in Barcelona, Catalonia, Spain. It was the last private residence designed by architect Antoni Gaudí and was built between 1906 and 1912. The building was commissioned in 1906 by and his wife . At the time, it was controversial because of its undulating stone facade, twisting wrought iron balconies, and design by Josep Maria Jujol. Several structural innovations include a self-supporting stone façade, and a free-plan floor, underground garage and the spectacular terrace on the roof. In 1984, it was declared a World Heritage Site by UNESCO. Since 2013 it has been the headquarters of the Fundació Catalunya La Pedrera, which manages visits to the building, exhibitions and other cultural and educational activities at Casa Milà. Building history Architect Antoni Gaudí i Cornet was born on June 25, 1852, in Catalonia, Spain. As a child, Gaudí's health was poor, suffering from rheumatism. Because of this, he was afforded lengthy periods of time resting at his summer house in Riudoms. Here he spent a large portion of his time outdoors, allowing him to deeply study nature. This would become one of the major influences in his architecture to come. Gaudí was a very practical man and a craftsman at his core. In his work he followed impulses and turned creative plans into reality. His openness to embrace new styles combined with a vivid imagination helped mold new styles of architecture and consequently helped push the limits of construction. Today he is regarded as a pioneer of the modern architecture style. In 1870, Gaudí moved to Barcelona to study architecture. He was an inconsistent student who showed flashes of brilliance. It took him eight years to graduate due to a mix of health complications, military service as well as other activities. After completion of his education he became a prolific architect as well as designing gardens, sculptures and all other decorative arts. Gaudí's most famous works consisted of several buildings: Parque Güell; Palacio Güell; Casa Mila; Casa Vicens. He also is contributed for his work on the Crypt of La Sagrada Familia and the Nativity facade. Gaudí's work at the time was both admired and criticized for his bold, innovative solutions. Gaudí was injured on June 7, 1926, when he was run over by a tram. He later died in the hospital due to his injuries on June 10, 1926, at the age of 73. A few years after his death, his fame became renowned by critics and the general public alike. Building owners Casa Milà was built for Roser Segimón and her husband Pere Milà. Roser Segimón was the wealthy widow of Josep Guardiola, an Indiano or Americano, or former colonist returned from South America, who had made his fortune with a coffee plantation in Guatemala. Her second husband, Pere Milà was a developer known for his flamboyant lifestyle. Construction process In 1905, Milà and Segimón married and on June 9, Roser Segimón bought a house with garden which occupied an area of 1,835 square meters, located on Paseo de Gracia, 92. In September, they commissioned Gaudí for building them a new house with the idea of living in the main floor and renting out the rest of the apartments. On February 2, 1906, the project was presented to the Barcelona City Council and the works began, demolishing the pre-existing building instead of reforming it, as in the case of the Casa Batlló. The building was completed in December 1910 and the owner asked Gaudí to make a certificate to inhabit the main floor, which the City Council authorized in October 1911, and the couple moved in. On October 31, 1912, Gaudí issued the certificate stating that, in accordance with his plans and his direction, the work had been completed and the whole house was ready to be rented. Critics and controversies The building did not respect any rules of conventional style, for which Gaudí received much criticism. To begin with, the name "La Pedrera" is in fact a nickname assigned by the citizens who disapproved of its unusualness. The unique structure of the building and the relationship between the building's architect and Pere Milà became the object of ridicule for the people of Barcelona and many humorous publications of the time. Catholic symbols Gaudí, a Catholic and a devotee of the Virgin Mary, planned for the Casa Milà to be a spiritual symbol. Overt religious elements include an excerpt from the Rosary on the cornice and planned statues of Mary, specifically Our Lady of the Rosary, and two archangels, St. Michael and St. Gabriel. However, the Casa Milà was not built entirely to Gaudí's specifications. The local government ordered the demolition of elements that exceeded the height standard for the city, and fined the Milàs for many infractions of building codes. After Semana Trágica, an outbreak of anticlericalism in the city, Milà prudently decided to forgo the religious statues. Gaudí contemplated abandoning the project but a priest persuaded him to continue. Change of ownership In 1940, Milà died. Segimon sold the property in 1946 for 18 million pesetas to Josep Ballvé i Pellisé, known for his department stores on , in partnership with the family of Pío Rubert Laporta. The Compañía Inmobiliaria Provenza, SA (CIPSA) was founded to administer the building. Roser Segimon continued to live on the main floor until her death in 1964. The new owners divided the first floor facing into five apartments instead of the original two. In 1953, they commissioned to convert 13 rubbish-filled attic laundry rooms to street-facing apartments, leaving a communal hallway on the side facing the courtyards. Some of these two or three room apartments had a loft and were designed and furnished in a typical early 1950s style using brick, ceramic and wood. Items of furniture, such as the , were reminiscent of Eero Saarinen's work. The insurance company Northern took over the main floor in 1966. By then, Casa Milà had housed a bingo hall, an academy and the offices of Cementos Molins and Inoxcrom among others. Maintenance costs were high and the owners had allowed the building to become dilapidated, causing stones to loosen in 1971. Josep Anton Comas made some emergency repairs, especially to the paintings in the courtyards, while respecting the original design. Restoration Gaudí's work was designated a historic and artistic monument on July 24, 1969. Casa Milà was in poor condition in the early 1980s. It had been painted a dreary brown and many of its interior color schemes had been abandoned or allowed to deteriorate, but it has been restored since and many of the original colors revived. In 1984, the building became part of a World Heritage Site encompassing some of Gaudí's works. The Barcelonan city council tried to rent the main floor as an office for the 1992 Olympic bid. Finally, the day before Christmas 1986, Caixa Catalunya bought La Pedrera for 900 million pesetas. On February 19, 1987, urgently needed work began on the restoration and cleaning of the façade. The work was done by the architects Joseph Emilio Hernández-Cros and Rafael Vila. The renovated main floor opened in 1990 as part of the Cultural Olympiad of Barcelona. The floor became an exhibition room with an example of modernism in the Eixample. Design The building is 1,323 m2 per floor on a plot of 1,620 m2. Gaudí made the first sketches in his workshop in the Sagrada Família. He designed the house as a constant curve, both outside and inside, incorporating ruled geometry and naturalistic elements. Casa Milà consists of two buildings, which are structured around two courtyards that provide light to the nine stories: basement, ground floor, mezzanine, main (or noble) floor, four upper floors, and an attic. The basement was intended to be the garage, the main floor the residence of the Milàs (a flat of all 1,323 m2), and the rest distributed over 20 apartments. The resulting layout is shaped like an asymmetrical "8" because of the different shapes and sizes of the courtyards. The attic housed the laundry and drying areas, forming an insulating space for the building and simultaneously determining the levels of the roof. One of the most notable elements of the building is the roof, crowned with skylights, staircase exits, fans, and chimneys. All of these elements, constructed out of brick covered with lime, broken marble, or glass have a specific architectural function but are also real sculptures integrated into the building. The apartments feature plastered ceilings with dynamic reliefs, handcrafted wooden doors, windows, and furniture, as well as hydraulic tiles and various ornamental elements. The stairways were intended as service entries, with the main access to the apartments by elevator except for the noble floor, where Gaudí added a prominent interior staircase. Gaudí wanted the people who lived in the flats to all know each other. Therefore, there were only elevators on every other floor, so people on different floors would meet one another. Structure Casa Milà is characterized by its self-supporting stone facade, meaning that it is free of load-bearing walls. The facade connects to the internal structure of each floor by means of curved iron beams surrounding the perimeter of each floor. This construction system allows, on one hand, large openings in the facade which give light to the homes, and on the other, free structuring of the different levels, so that internal walls can be added and demolished without affecting the stability of the building. This allows the owners to change their minds at will and to modify, without problems, the interior layout of the homes. Constructive and decorative items Facade The facade is composed of large blocks of limestone from the Garraf Massif on the first floor and from the Villefranche quarry for the higher levels. The blocks were cut to follow the plot of the projection of the model, then raised to their location and adjusted to align in a continuous curve to the pieces around them. The windows of La Pedrera are an integral part of the overall facade design. Gaudí made sure that the windows were of varying sizes, designed to optimize the amount of natural light that could enter the building. Viewed from the outside the building has three parts: the main body of the six-storey blocks with winding stone floors, two floors set a block back with a different curve, similar to waves, a smoother texture and whiter color, and with small holes that look like embrasures, and finally the body of the roof. Gaudí's original facade had some of its lower-level ironwork removed. In 1928, the tailor Mosella opened the first store in La Pedrera, and he eliminated the bars. This did not concern anyone, because in the middle of twentieth century, wrought ironwork had little importance. The ironwork was lost until a few years later, when Americans donated one of them to the MoMa, where it is on display. With restoration initiatives launched in 1987, the facade was rejoined to some pieces of stone that had fallen. In order to respect the fidelity of the original, material was obtained from the Villefranche quarry, even though by then it was no longer operating. Hall and courtyards The building uses a completely original solution to solve the issue of a lobby being too closed and dark. Its open and airy courtyards provide a place of transit and are directly visible to those accessing the building. There are two patios on the side of the Passeig de Gracia and of the street Provence. Patios Patios, structurally, are key as supporting loads of interior facades. The floor of the courtyard is supported by pillars of cast iron. In the courtyard, there are traditional elliptical beams and girders but Gaudí applied an ingenious solution of using two concentric cylindrical beams with stretched radial beams, like the spokes of a bicycle. They form a point outside of the beam to two points above and below, making the function of the central girder a keystone and working in tension and compression simultaneously. This supported structure is twelve feet in diameter and is considered "the soul of the building" with a clear resemblance to Gothic crypts. The centerpiece was built in a shipyard by Josep Maria Carandell who copied a steering wheel, interpreting Gaudí's intent as to represent the helm of the ship of life. Interior, gates Access is protected by a massive iron gate with a design attributed to Jujol. It was originally used by both people and cars, as access to the garage is in the basement, now an auditorium. The two halls are fully polychrome with oil paintings on the plaster surfaces, with eclectic references to mythology and flowers. During construction there was a problem including a basement as a garage for cars, the new invention that was thrilling the bourgeois at the time. The future neighbor Felix Anthony Meadows, owner of Industrial Linera, requested a change because his Rolls-Royce could not access it. Gaudí agreed to remove a pillar on the ramp that led into the garage so that Felix, who was establishing sales and factory in Parets del Vallès, could go to both places with his car from La Pedrera. For the floors of Casa Milà, Gaudí used a model of floor forms of square timbers with two colors, and the hydraulic pavement hexagonal pieces of blue and sea motifs that had originally been designed for the Batllo house. The wax was designed in gray by John Bertrand under the supervision of Gaudí who "touched up with their own fingers," in the words of the manufacturer Josep Bay. Loft Like in Casa Batlló, Gaudí shows the application of the catenary arch as a support structure for the roof, a form which he had already used shortly after graduating in the wood frameworks of Mataró's cooperative known as "L'Obrera Mataronense." In this case, Gaudí used the Catalan technique of timbrel, imported from Italy in the fourteenth century. The attic, where the laundry rooms were located, was a clear room under a Catalan vault roof supported by 270 parabolic vaults of different heights and spaced by about 80 cm. The roof resembles both the ribs of a huge animal and a palm, giving the roof-deck a very unconventional shape similar to a landscape of hills and valleys. The shape and location of the courtyards makes the arches higher when the space is narrowed and lower when the space expands. The builder Bayó explained its construction: "First the face of a wide wall was filled with mortar and plastered. Then Canaleta indicated the opening of each arch and Bayó put a nail at each starting point of the arch at the top of the wall. From these nails was dangled a chain so that the lowest point coincided with the deflection of the arch. Then the profile displayed on the wall by the chain was drawn and on this profile the carpenter marked and placed the corresponding centering, and the timbrel vault was started with three rows of plane bricks. Gaudí wanted to add a longitudinal axis of bricks connecting all vaults at their keystones". Roof and chimneys The work of Gaudí on the rooftop of La Pedrera brought his experience at Palau Güell together with solutions that were clearly more innovative – this time creating shapes and volumes with more body, more prominence, and less polychromasia. On the rooftop there are six skylights/staircase exits (four of which were covered with broken pottery and some that ended in a double cross typical of Gaudí), twenty-eight chimneys in several groupings, two half-hidden vents whose function is to renew the air in the building, and four domes that discharged to the facade. The staircases also house the water tanks; some of which are snail-shaped. The stepped roof of La Pedrera, called "the garden of warriors" by the poet Pere Gimferrer because the chimneys appear to be protecting the skylights, has undergone a radical restoration, removing chimneys added in interventions after Gaudí, television antennas, and other elements that degraded the space. The restoration brought back the splendor to the chimneys and the skylights that were covered with fragments of marble and broken Valencia tiles. One of the chimneys was topped with glass pieces – it was said that Gaudí did that the day after the inauguration of the building, taking advantage of the empty bottles from the party. It was restored with the bases of champagne bottles from the early twentieth century. The repair work has enabled the restoration of the original impact of the overhangs made of stone from Ulldecona with fragments of tiles. This whole set is more colorful than the facade, although here the creamy tones are dominant. Furniture Gaudí, as he had done in Casa Batlló, designed furniture specifically for the main floor. This was part of the concept artwork itself integral to modernism in which the architect assumed responsibility for global issues such as the structure and the facade, as well as every detail of the decor, designing furniture and accessories such as lamps, planters, floors or ceilings. This was another point of friction with Segimon, who complained that there was no straight wall to place her Steinway piano. Gaudí's response was blunt: "So play the violin." The result of these disagreements has been the loss of the decorative legacy of Gaudí, as most of the furniture was removed due to climate change and the changes she made to the main floor when Gaudí died. Some remain in private collections, including a curtain made of oak 4 m. long by 1.96 m. high in the Museum of Catalan Modernism; and a chair and desktop of Milà. Gaudí carved oak doors similar to what he had done for the Casa y Bardes, but these were only included on two floors as when Segimon discovered the price, she decided there would be no more at that quality. Architecture Casa Milà is part of the UNESCO World Heritage Site "Works of Antoni Gaudí". It was a predecessor of some buildings with a similar biomorphic appearance: the 1921 Einstein Tower in Potsdam, designed by Erich Mendelsohn Solomon R. Guggenheim Museum in Manhattan, New York, designed by Frank Lloyd Wright Chapelle Notre Dame du Haut, Ronchamp, France, designed by Le Corbusier the Hundertwasserhaus and other works by Austrian architect Friedensreich Hundertwasser Disney Concert Hall in Los Angeles, by Frank Gehry Free exhibitions often are held on the first floor, which also provides some opportunity to see the interior design. There is a charge for entrance to the apartment on the fourth floor and the roof. The other floors are not open to visitors. Constructive similarities Gaudí's La Pedrera was inspired by a mountain, but there is no agreement as to which mountain was the reference model. Joan Bergós thought it was the rocks of Fray Guerau in Prades mountains. Joan Matamala thought that the model could have been St. Miquel del Fai, while the sculptor Vicente Vilarubias believed it was inspired by the cliffs Torrent Pareis in Menorca. Other options include the mountains of Uçhisar in Cappadocia, suggested by Juan Goytisolo, or Mola Gallifa, suggested by Louis Permanyer, based on the fact that Gaudí visited the area in 1885 to escape an outbreak of cholera in Barcelona. Some people say that the interior layout of La Pedrera comes from studies that Gaudí made of medieval fortresses. This image is reinforced by the seeming appearance of the rooftop chimneys as "sentinels" with great helmets. The structure of the iron door in the lobby does not follow any symmetry, straight or repetitive pattern. Rather, it evokes bubbles of soap that are formed between the hands or the structures of a plant cell. Criticism and controversy The building's unconventional style made it the subject of much criticism. It was given the nickname "La Pedrera", meaning "the quarry". Casa Milà appeared in many satirical magazines. Joan Junceda presented it as a traditional "Easter cake" by means of cartoons in Patufet. Joaquim Garcia made a joke about the difficulty of setting the damask wrought iron balconies in his magazine. Homeowners in Passeig de Gracia became angry with Milà and ceased to greet him, arguing that the weird building by Gaudí would lower the price of land in the area. Administrative problems Casa Milà also caused some administrative problems. In December 1907 the City Hall stopped work on the building because of a pillar which occupied part of the sidewalk, not respecting the alignment of facades. Again on August 17, 1908, more problems occurred when the building surpassed the predicted height and borders of its construction site by . The Council called for a fine of 100,000 pesetas (approximately 25% of the cost of work) or for the demolition of the attic and roof. The dispute was resolved a year and a half later, December 28, 1909, when the Commission certified that it was a monumental building and thus not required to have a 'strict compliance' with the bylaws. Design competitions The owner entered La Pedrera in the annual sponsored by the Barcelona City Council (Ayuntament). Other entries in the competition included two works by Sagnier (Calle Mallorca 264, and one on Corsica and Av. Diagonal), the by architect , and the , designed by . Although the most dramatic and clear favorite was Casa Milà, the jury opined that even though the facades were complete, "there's still a lot left to do before it's fully completed, finalized and in a perfect state of appreciation." The winner in 1910 was Samanillo Perez, for his building which now houses the headquarters of the Circulo Ecuestre. Design disagreements Gaudí's relations with Segimon deteriorated during the construction and decoration of the house. There were many disagreements between them, one example was the monumental bronze virgin del Rosario, which Gaudí wanted as the statue on the front of the building in homage to the name of the owner, that the artist Carles Mani i Roig was to sculpt. The statue was not made although the words "Ave gratia M plena Dominus tecum" were written at the top of the facade. Continuing disagreements led Gaudí to take Milà to court over his fees. The lawsuit was won by Gaudí in 1916, and he gave the 105,000 pesetas he won in the case to charity, stating that "the principles mattered more than money." Milà was having to pay the mortgage. After Gaudí's death in 1926, Segimon got rid of most of the furniture that Gaudí had designed and covered over parts of Gaudí's designs with new decorations in the style of Louis XVI. La Pedrera was acquired in 1986 by and when restoration was done four years later, some of the original decorations re-emerged. When the Civil War broke out in July 1936, the Milàs were on vacation. Part of the building was collectivized by the Unified Socialist Party of Catalonia; the Milàs fled the area with some artwork. In media and literature A scene in The Passenger (Italian: Professione: reporter), a film directed by Michelangelo Antonioni and starring Jack Nicholson and Maria Schneider, was filmed on the roof of the building. A scene filmed on the roof in Vicky Cristina Barcelona, directed by Woody Allen. A major part in the story "A murderer is born" in the novel Seiobo There Below by László Krasznahorkai happens here Mentioned in the book by Eoin Colfer: Artemis Fowl and the Lost Colony Mentioned in the book by Trudi Alexy 'The Mezuzah in the Madonna's Foot' Mentioned in the 'Ballrooms and Biscotti' episode (season 4, episode 1) of Gilmore Girls Several scenes in the movie, Gaudi Afternoon A scale model exhibited at the Catalunya en Miniatura park. Featured in the music video for Deep Forest's 'Sweet Lullaby' The home of Edmond Kirsch in Dan Brown's novel Origin, the 5th book featuring Robert Langdon. Gallery See also List of Modernisme buildings in Barcelona References Rainer Zervst. Gaudí, 1852–1926, Antoni Gaudí i Cornet – A Life Devoted to Architecture. Cologne: Benedikt Taschen Verlag GmbH & Co. KG., 1988. p176. External links La Pedrera Official Website Virtual tour Immersive photographies of Casa Milà Link pictures La Casa Milà, furniture and decorative arts Visionary environments Buildings and structures in Barcelona Passeig de Gràcia World Heritage Sites in Catalonia Antoni Gaudí buildings Tourist attractions in Barcelona Apartment buildings in Spain Residential buildings completed in 1910 Eixample Modernisme architecture in Barcelona Art Nouveau apartment buildings	7
In particle physics, every type of particle is associated with an antiparticle with the same mass but with opposite physical charges (such as electric charge). For example, the antiparticle of the electron is the positron (also known as an antielectron). While the electron has a negative electric charge, the positron has a positive electric charge, and is produced naturally in certain types of radioactive decay. The opposite is also true: the antiparticle of the positron is the electron. Some particles, such as the photon, are their own antiparticle. Otherwise, for each pair of antiparticle partners, one is designated as the normal particle (the one that occurs in matter usually interacted with in daily life). The other (usually given the prefix "anti-") is designated the antiparticle. Particle–antiparticle pairs can annihilate each other, producing photons; since the charges of the particle and antiparticle are opposite, total charge is conserved. For example, the positrons produced in natural radioactive decay quickly annihilate themselves with electrons, producing pairs of gamma rays, a process exploited in positron emission tomography. The laws of nature are very nearly symmetrical with respect to particles and antiparticles. For example, an antiproton and a positron can form an antihydrogen atom, which is believed to have the same properties as a hydrogen atom. This leads to the question of why the formation of matter after the Big Bang resulted in a universe consisting almost entirely of matter, rather than being a half-and-half mixture of matter and antimatter. The discovery of charge parity violation helped to shed light on this problem by showing that this symmetry, originally thought to be perfect, was only approximate. Because charge is conserved, it is not possible to create an antiparticle without either destroying another particle of the same charge (as is for instance the case when antiparticles are produced naturally via beta decay or the collision of cosmic rays with Earth's atmosphere), or by the simultaneous creation of both a particle and its antiparticle, which can occur in particle accelerators such as the Large Hadron Collider at CERN. Particles and their antiparticles have equal and opposite charges, so that an uncharged particle also gives rise to an uncharged antiparticle. In many cases, the antiparticle and the particle coincide: pairs of photons, Z0 bosons, mesons, and hypothetical gravitons and some hypothetical WIMPs all self-annihilate. However, electrically neutral particles need not be identical to their antiparticles: for example, the neutron and antineutron are distinct. History Experiment In 1932, soon after the prediction of positrons by Paul Dirac, Carl D. Anderson found that cosmic-ray collisions produced these particles in a cloud chamber – a particle detector in which moving electrons (or positrons) leave behind trails as they move through the gas. The electric charge-to-mass ratio of a particle can be measured by observing the radius of curling of its cloud-chamber track in a magnetic field. Positrons, because of the direction that their paths curled, were at first mistaken for electrons travelling in the opposite direction. Positron paths in a cloud-chamber trace the same helical path as an electron but rotate in the opposite direction with respect to the magnetic field direction due to their having the same magnitude of charge-to-mass ratio but with opposite charge and, therefore, opposite signed charge-to-mass ratios. The antiproton and antineutron were found by Emilio Segrè and Owen Chamberlain in 1955 at the University of California, Berkeley. Since then, the antiparticles of many other subatomic particles have been created in particle accelerator experiments. In recent years, complete atoms of antimatter have been assembled out of antiprotons and positrons, collected in electromagnetic traps. Dirac hole theory Solutions of the Dirac equation contain negative energy quantum states. As a result, an electron could always radiate energy and fall into a negative energy state. Even worse, it could keep radiating infinite amounts of energy because there were infinitely many negative energy states available. To prevent this unphysical situation from happening, Dirac proposed that a "sea" of negative-energy electrons fills the universe, already occupying all of the lower-energy states so that, due to the Pauli exclusion principle, no other electron could fall into them. Sometimes, however, one of these negative-energy particles could be lifted out of this Dirac sea to become a positive-energy particle. But, when lifted out, it would leave behind a hole in the sea that would act exactly like a positive-energy electron with a reversed charge. These holes were interpreted as "negative-energy electrons" by Paul Dirac and mistakenly identified with protons in his 1930 paper A Theory of Electrons and Protons However, these "negative-energy electrons" turned out to be positrons, and not protons. This picture implied an infinite negative charge for the universea problem of which Dirac was aware. Dirac tried to argue that we would perceive this as the normal state of zero charge. Another difficulty was the difference in masses of the electron and the proton. Dirac tried to argue that this was due to the electromagnetic interactions with the sea, until Hermann Weyl proved that hole theory was completely symmetric between negative and positive charges. Dirac also predicted a reaction + → + , where an electron and a proton annihilate to give two photons. Robert Oppenheimer and Igor Tamm, however, proved that this would cause ordinary matter to disappear too fast. A year later, in 1931, Dirac modified his theory and postulated the positron, a new particle of the same mass as the electron. The discovery of this particle the next year removed the last two objections to his theory. Within Dirac's theory, the problem of infinite charge of the universe remains. Some bosons also have antiparticles, but since bosons do not obey the Pauli exclusion principle (only fermions do), hole theory does not work for them. A unified interpretation of antiparticles is now available in quantum field theory, which solves both these problems by describing antimatter as negative energy states of the same underlying matter field, i.e. particles moving backwards in time. Particle–antiparticle annihilation If a particle and antiparticle are in the appropriate quantum states, then they can annihilate each other and produce other particles. Reactions such as + → (the two-photon annihilation of an electron-positron pair) are an example. The single-photon annihilation of an electron-positron pair, + → , cannot occur in free space because it is impossible to conserve energy and momentum together in this process. However, in the Coulomb field of a nucleus the translational invariance is broken and single-photon annihilation may occur. The reverse reaction (in free space, without an atomic nucleus) is also impossible for this reason. In quantum field theory, this process is allowed only as an intermediate quantum state for times short enough that the violation of energy conservation can be accommodated by the uncertainty principle. This opens the way for virtual pair production or annihilation in which a one particle quantum state may fluctuate into a two particle state and back. These processes are important in the vacuum state and renormalization of a quantum field theory. It also opens the way for neutral particle mixing through processes such as the one pictured here, which is a complicated example of mass renormalization. Properties Quantum states of a particle and an antiparticle are interchanged by the combined application of charge conjugation , parity and time reversal . and are linear, unitary operators, is antilinear and antiunitary, . If denotes the quantum state of a particle with momentum and spin whose component in the z-direction is , then one has where denotes the charge conjugate state, that is, the antiparticle. In particular a massive particle and its antiparticle transform under the same irreducible representation of the Poincaré group which means the antiparticle has the same mass and the same spin. If , and can be defined separately on the particles and antiparticles, then where the proportionality sign indicates that there might be a phase on the right hand side. As anticommutes with the charges, , particle and antiparticle have opposite electric charges q and -q. Quantum field theory This section draws upon the ideas, language and notation of canonical quantization of a quantum field theory. One may try to quantize an electron field without mixing the annihilation and creation operators by writing where we use the symbol k to denote the quantum numbers p and σ of the previous section and the sign of the energy, E(k), and ak denotes the corresponding annihilation operators. Of course, since we are dealing with fermions, we have to have the operators satisfy canonical anti-commutation relations. However, if one now writes down the Hamiltonian then one sees immediately that the expectation value of H need not be positive. This is because E(k) can have any sign whatsoever, and the combination of creation and annihilation operators has expectation value 1 or 0. So one has to introduce the charge conjugate antiparticle field, with its own creation and annihilation operators satisfying the relations where k has the same p, and opposite σ and sign of the energy. Then one can rewrite the field in the form where the first sum is over positive energy states and the second over those of negative energy. The energy becomes where E0 is an infinite negative constant. The vacuum state is defined as the state with no particle or antiparticle, i.e., and . Then the energy of the vacuum is exactly E0. Since all energies are measured relative to the vacuum, H is positive definite. Analysis of the properties of ak and bk shows that one is the annihilation operator for particles and the other for antiparticles. This is the case of a fermion. This approach is due to Vladimir Fock, Wendell Furry and Robert Oppenheimer. If one quantizes a real scalar field, then one finds that there is only one kind of annihilation operator; therefore, real scalar fields describe neutral bosons. Since complex scalar fields admit two different kinds of annihilation operators, which are related by conjugation, such fields describe charged bosons. Feynman–Stueckelberg interpretation By considering the propagation of the negative energy modes of the electron field backward in time, Ernst Stueckelberg reached a pictorial understanding of the fact that the particle and antiparticle have equal mass m and spin J but opposite charges q. This allowed him to rewrite perturbation theory precisely in the form of diagrams. Richard Feynman later gave an independent systematic derivation of these diagrams from a particle formalism, and they are now called Feynman diagrams. Each line of a diagram represents a particle propagating either backward or forward in time. In Feynman diagrams, anti-particles are shown traveling backwards in time relative to normal matter, and vice versa. This technique is the most widespread method of computing amplitudes in quantum field theory today. Since this picture was first developed by Stueckelberg, and acquired its modern form in Feynman's work, it is called the Feynman–Stueckelberg interpretation of antiparticles to honor both scientists. See also List of particles Antimatter Gravitational interaction of antimatter Parity, charge conjugation, and time reversal symmetry CP violations Quantum field theory Baryogenesis, baryon asymmetry, and Leptogenesis One-electron universe Paul Dirac Notes References External links Antimatter at CERN Subatomic particles Quantum field theory Antimatter Particle physics	7
Events Pre-1600 461 – Roman Emperor Majorian is beheaded near the river Iria in north-west Italy following his arrest and deposition by the magister militum Ricimer. 626 – The Avar and Slav armies leave the siege of Constantinople. 768 – Pope Stephen III is elected to office, and quickly seeks Frankish protection against the Lombard threat, since the Byzantine Empire is no longer able to help. 936 – Coronation of King Otto I of Germany. 1461 – The Ming dynasty Chinese military general Cao Qin stages a coup against the Tianshun Emperor. 1479 – Battle of Guinegate: French troops of King Louis XI were defeated by the Burgundians led by Archduke Maximilian of Habsburg. 1601–1900 1679 – The brigantine Le Griffon becomes the first ship to sail the upper Great Lakes of North America. 1714 – The Battle of Gangut: The first important victory of the Russian Navy. 1743 – The Treaty of Åbo ended the 1741–1743 Russo-Swedish War. 1782 – George Washington orders the creation of the Badge of Military Merit to honor soldiers wounded in battle. It is later renamed to the more poetic Purple Heart. 1786 – The first federal Indian Reservation is created by the United States. 1789 – The United States Department of War is established. 1791 – American troops destroy the Miami town of Kenapacomaqua near the site of present-day Logansport, Indiana in the Northwest Indian War. 1794 – U.S. President George Washington invokes the Militia Acts of 1792 to suppress the Whiskey Rebellion in western Pennsylvania. 1819 – Simón Bolívar triumphs over Spain in the Battle of Boyacá. 1858 – The first Australian rules football match is played between Melbourne Grammar and Scotch College. 1890 – Anna Månsdotter, found guilty of the 1889 Yngsjö murder, became the last woman to be executed in Sweden. 1901–present 1909 – Alice Huyler Ramsey and three friends become the first women to complete a transcontinental auto trip, taking 59 days to travel from New York, New York to San Francisco, California. 1927 – The Peace Bridge opens between Fort Erie, Ontario and Buffalo, New York. 1930 – The last confirmed lynching of black people in the Northern United States occurs in Marion, Indiana; two men, Thomas Shipp and Abram Smith, are killed. 1933 – The Kingdom of Iraq slaughters over 3,000 Assyrians in the village of Simele. This date is recognized as Martyrs Day or National Day of Mourning by the Assyrian community in memory of the Simele massacre. 1942 – World War II: The Battle of Guadalcanal begins as the United States Marines initiate the first American offensive of the war with landings on Guadalcanal and Tulagi in the Solomon Islands. 1944 – IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the Harvard Mark I). 1946 – The government of the Soviet Union presented a note to its Turkish counterparts which refuted the latter's sovereignty over the Turkish Straits, thus beginning the Turkish Straits crisis. 1947 – Thor Heyerdahl's balsa wood raft, the Kon-Tiki, smashes into the reef at Raroia in the Tuamotu Islands after a 101-day, journey across the Pacific Ocean in an attempt to prove that pre-historic peoples could have traveled from South America. 1947 – The Bombay Municipal Corporation formally takes over the Bombay Electric Supply and Transport (BEST). 1959 – Explorer program: Explorer 6 launches from the Atlantic Missile Range in Cape Canaveral, Florida. 1960 – Ivory Coast becomes independent from France. 1962 – Canadian-born American pharmacologist Frances Oldham Kelsey is awarded the U.S. President's Award for Distinguished Federal Civilian Service for her refusal to authorize thalidomide. 1964 – Vietnam War: The U.S. Congress passes the Gulf of Tonkin Resolution giving U.S. President Lyndon B. Johnson broad war powers to deal with North Vietnamese attacks on American forces. 1969 – Richard Nixon appoints Luis R. Bruce, a Mohawk-Oglala Sioux and co-founder of the National Congress of American Indians, as the new commissioner of the Bureau of Indian Affairs. 1970 – California judge Harold Haley is taken hostage in his courtroom and killed during an effort to free George Jackson from police custody. 1974 – Philippe Petit performs a high wire act between the twin towers of the World Trade Center in the air. 1976 – Viking program: Viking 2 enters orbit around Mars. 1978 – U.S. President Jimmy Carter declares a federal emergency at Love Canal due to toxic waste that had been disposed of negligently. 1981 – The Washington Star ceases all operations after 128 years of publication. 1985 – Takao Doi, Mamoru Mohri and Chiaki Mukai are chosen to be Japan's first astronauts. 1987 – Cold War: Lynne Cox becomes the first person to swim from the United States to the Soviet Union, crossing the Bering Strait from Little Diomede Island in Alaska to Big Diomede in the Soviet Union. 1989 – U.S. Congressman Mickey Leland (D-TX) and 15 others die in a plane crash in Ethiopia. 1990 – First American soldiers arrive in Saudi Arabia as part of the Gulf War. 1993 – Ada Deer, a Menominee activist, is sworn in as the head of the Bureau of Indian Affairs. 1995 – The Chilean government declares state of emergency in the southern half of the country in response to an event of intense, cold, wind, rain and snowfall known as the White Earthquake. 1997 – Space Shuttle Program: The Space Shuttle Discovery launches on STS-85 from the Kennedy Space Center in Cape Canaveral, Florida. 1997 – Fine Air Flight 101 crashes after takeoff from Miami International Airport, killing five people. 1998 – Bombings at United States embassies in Dar es Salaam, Tanzania and Nairobi, Kenya kill approximately 212 people. 1999 – The Chechnya-based Islamic International Brigade invades neighboring Dagestan. 2007 – At AT&T Park, Barry Bonds hits his 756th career home run to surpass Hank Aaron's 33-year-old record. 2008 – The start of the Russo-Georgian War over the territory of South Ossetia. 2020 – Air India Express Flight 1344 overshoots the runway at Calicut International Airport in the Malappuram district of Kerala, India, and crashes, killing 21 of the 190 people on board. Births Pre-1600 317 – Constantius II, Roman emperor (d. 361) 1282 – Elizabeth of Rhuddlan (d. 1316) 1533 – Alonso de Ercilla, Spanish soldier and poet (d. 1595) 1560 – Elizabeth Báthory, Hungarian aristocrat and purported serial killer (d. 1614) 1571 – Thomas Lupo, English viol player and composer (d. 1627) 1574 – Robert Dudley, English explorer and cartographer (d. 1649) 1598 – Georg Stiernhielm, Swedish poet and linguist (d. 1672) 1601–1900 1613 – William Frederick, Prince of Nassau-Dietz, Dutch stadtholder (d. 1664) 1702 – Muhammad Shah, Mughal emperor of India (d. 1748) 1726 – James Bowdoin, American banker and politician, 2nd Governor of Massachusetts (d. 1790) 1742 – Nathanael Greene, American general (d. 1786) 1751 – Wilhelmina of Prussia, Princess of Orange (d. 1820) 1779 – Carl Ritter, German geographer and academic (d. 1859) 1826 – August Ahlqvist, Finnish professor, poet, scholar of the Finno-Ugric languages, author, and literary critic (d. 1889) 1844 – Auguste Michel-Lévy, French geologist and author (d. 1911) 1860 – Alan Leo, English astrologer and author (d. 1917) 1862 – Henri Le Sidaner, French painter (d. 1939) 1862 – Victoria of Baden (d. 1931) 1867 – Emil Nolde, Danish-German painter and illustrator (d. 1956) 1868 – Ladislaus Bortkiewicz, Russian-German economist and statistician (d. 1931) 1868 – Huntley Wright, English actor (d. 1941) 1869 – Mary Frances Winston, American mathematician (d. 1959) 1876 – Mata Hari, Dutch dancer and spy (d. 1917) 1879 – Johannes Kotze, South African cricketer (d. 1931) 1884 – Billie Burke, American actress and singer (d. 1970) 1884 – Nikolai Triik, Estonian painter and illustrator (d. 1940) 1887 – Anna Elisabet Weirauch, German author and playwright (d. 1970) 1890 – Elizabeth Gurley Flynn, American author and activist (d. 1964) 1901–present 1901 – Ann Harding, American actress and singer (d. 1981) 1903 – Louis Leakey, Kenyan-English palaeontologist and archaeologist (d. 1972) 1904 – Ralph Bunche, American political scientist, academic, and diplomat, Nobel Prize laureate (d. 1971) 1907 – Albert Kotin, Belarusian-American soldier and painter (d. 1980) 1910 – Freddie Slack, American pianist and bandleader (d. 1965) 1911 – István Bibó, Hungarian lawyer and politician (d. 1979) 1911 – Nicholas Ray, American director and screenwriter (d. 1979) 1913 – George Van Eps, American guitarist (d. 1998) 1916 – Kermit Love, American actor, puppeteer, and costume designer (d. 2008) 1918 – C. Buddingh', Dutch poet and translator (d. 1985) 1918 – Gordon Zahn, American sociologist and author (d. 2007) 1921 – Manitas de Plata, French guitarist (d. 2014) 1921 – Karel Husa, Czech-American composer and conductor (d. 2016) 1924 – Kenneth Kendall, Indian-English journalist and actor (d. 2012) 1925 – Felice Bryant, American songwriter (d. 2003) 1926 – Stan Freberg, American puppeteer, voice actor, and singer (d. 2015) 1927 – Rocky Bridges, American baseball player and coach (d. 2015) 1927 – Edwin Edwards, American soldier, lawyer, and politician, 50th Governor of Louisiana (d. 2021) 1927 – Art Houtteman, American baseball player and journalist (d. 2003) 1928 – Betsy Byars, American author and academic (d. 2020) 1928 – Owen Luder, English architect, designed Tricorn Centre and Trinity Square (d. 2021) 1928 – James Randi, Canadian-American stage magician and author (d. 2020) 1929 – Don Larsen, American baseball player (d. 2020) 1930 – Togrul Narimanbekov, Azerbaijani-French painter and academic (d. 2013) 1930 – Veljo Tormis, Estonian composer and educator (d. 2017) 1931 – Jack Good, British television producer (d. 2017) 1931 – Charles E. Rice, American scholar and author (d. 2015) 1932 – Abebe Bikila, Ethiopian runner (d. 1973) 1932 – Edward Hardwicke, English actor (d. 2011) 1932 – Rien Poortvliet, Dutch painter and illustrator (d. 1995) 1932 – Maurice Rabb, Jr., American ophthalmologist and academic (d. 2005) 1933 – Eddie Firmani, South African footballer and manager 1933 – Elinor Ostrom, American economist and academic, Nobel Prize laureate (d. 2012) 1933 – Jerry Pournelle, American journalist and author (d. 2017) 1933 – Alberto Romulo, Filipino politician and diplomat 1934 – Sándor Simó, Hungarian director, producer, and screenwriter (d. 2001) 1935 – Lee Corso, American college football coach and broadcaster 1935 – Rahsaan Roland Kirk, American saxophonist and composer (d. 1977) 1937 – Zoltán Berczik, Hungarian table tennis player and coach (d. 2011) 1937 – Don Wilson, English cricketer and coach (d. 2012) 1938 – Giorgetto Giugiaro, Italian automotive designer 1940 – Jean-Luc Dehaene, French-Belgian lawyer and politician, 63rd Prime Minister of Belgium (d. 2014) 1940 – Uwe Nettelbeck, German record producer, journalist and film critic (d. 2007) 1941 – Matthew Evans, Baron Evans of Temple Guiting, English publisher and politician (d. 2016) 1942 – Garrison Keillor, American humorist, novelist, short story writer, and radio host 1942 – Carlos Monzon, Argentinian boxer and actor (d. 1995) 1942 – Caetano Veloso, Brazilian singer-songwriter, writer and producer 1942 – Richard Sykes, English biochemist and academic 1942 – B. J. Thomas, American singer (d. 2021) 1943 – Mohammed Badie, Egyptian religious leader 1943 – Lana Cantrell, Australian singer-songwriter and lawyer 1943 – Alain Corneau, French director and screenwriter (d. 2010) 1944 – John Glover, American actor 1944 – Robert Mueller, American soldier and lawyer, 6th Director of the Federal Bureau of Investigation 1945 – Kenny Ireland, Scottish actor and director (d. 2014) 1945 – Alan Page, American football player and jurist 1947 – Franciscus Henri, Dutch-Australian singer-songwriter 1947 – Sofia Rotaru, Ukrainian singer-songwriter, producer, and actress 1948 – Marty Appel, American businessman and author 1948 – Greg Chappell, Australian cricketer and coach 1949 – Walid Jumblatt, Lebanese journalist and politician 1949 – Matthew Parris, South African-English journalist and politician 1950 – Rodney Crowell, American singer-songwriter and guitarist 1950 – Alan Keyes, American politician and diplomat, 16th Assistant Secretary of State for International Organization Affairs 1950 – S. Thandayuthapani, Sri Lankan educator and politician 1952 – Caroline Aaron, American actress and producer 1952 – Eamonn Darcy, Irish golfer 1952 – Kees Kist, Dutch footballer 1952 – Alexei Sayle, English comedian, actor, and author 1953 – Anne Fadiman, American journalist and author 1954 – Valery Gazzaev, Russian footballer, manager and politician 1954 – Jonathan Pollard, Israeli spy 1954 – Alan Reid, Scottish politician 1955 – Wayne Knight, American actor, comedian and voice actor 1955 – Greg Nickels, American lawyer and politician, 51st Mayor of Seattle 1955 – Vladimir Sorokin, Russian author and playwright 1957 – Daire Brehan, Irish journalist, lawyer, and actress (d. 2012) 1957 – Alexander Dityatin, Russian gymnast and colonel 1958 – Russell Baze, Canadian-American jockey 1958 – Bruce Dickinson, English singer-songwriter and guitarist 1958 – Alberto Salazar, Cuban-American runner and coach 1959 – Koenraad Elst, Belgian orientalist and author 1959 – Ali Shah, Zimbabwean cricketer and coach 1960 – David Duchovny, American actor, director, producer, and screenwriter 1961 – Brian Conley, English actor and singer 1961 – Yelena Davydova, Russian gymnast 1961 – Walter Swinburn, English jockey and trainer (d. 2016) 1961 – Carlos Vives, Colombian singer, songwriter, and actor 1962 – Alison Brown, American banjo player, songwriter, and producer 1963 – Paul Dunn, Australian rugby league player 1963 – Nick Gillespie, American journalist and author 1963 – Marcus Roberts, American pianist and educator 1964 – John Birmingham, English-Australian journalist and author 1964 – Ian Dench, English guitarist and songwriter 1964 – Peter Niven, Scottish jockey 1965 – Raul Malo, American singer-songwriter, guitarist, and producer 1965 – Elizabeth Manley, Canadian figure skater 1966 – David Cairns, Scottish laicised priest and politician, Minister of State for Scotland (d. 2011) 1966 – Shobna Gulati, British actress 1966 – Kristin Hersh, American singer-songwriter and guitarist 1966 – Jimmy Wales, American-British entrepreneur, co-founder of Wikipedia 1967 – Jason Grimsley, American baseball player 1968 – Francesca Gregorini, Italian-American director and screenwriter 1968 – Trevor Hendy, Australian surfer and coach 1968 – Sophie Lee, Australian actress and author 1969 – Paul Lambert, Scottish footballer and manager 1969 – Dana G. Peleg, Israeli writer and LGBT activist 1970 – Eric Namesnik, American swimmer (d. 2006) 1971 – Dominic Cork, England cricketer and sportscaster 1971 – Rachel York, American actress and singer 1972 – Gerry Peñalosa, Filipino boxer and promoter 1973 – Mikhail Gorsheniov, Russian singer-songwriter (d. 2013) 1973 – Danny Graves, Vietnamese-American baseball player 1973 – Kevin Muscat, English-Australian footballer, coach, and manager 1974 – Chico Benymon, American actor 1974 – Michael Shannon, American actor 1975 – Koray Candemir, Turkish singer-songwriter 1975 – Gerard Denton, Australian cricketer 1975 – Megan Gale, Australian model and actress 1975 – Ray Hill, American football player (d. 2015) 1975 – Rebecca Kleefisch, American journalist and politician, 44th Lieutenant Governor of Wisconsin 1975 – Édgar Rentería, Colombian baseball player 1975 – Charlize Theron, South African actress 1976 – Dimitrios Eleftheropoulos, Greek footballer and manager 1976 – Shane Lechler, American football player 1977 – Charlotte Ronson, English fashion designer 1977 – Samantha Ronson, English singer-songwriter and DJ 1977 – Justin Brooker, Rugby League Player 1978 – Alexandre Aja, French director, producer, and screenwriter 1978 – Jamey Jasta, American singer-songwriter 1978 – Mark McCammon, English-Barbadian footballer 1978 – Cirroc Lofton, American actor 1979 – Eric Johnson, American actor, director, and screenwriter 1979 – Miguel Llera, Spanish footballer 1979 – Birgit Zotz, Austrian anthropologist and author 1980 – Carsten Busch, German footballer 1980 – Aurélie Claudel, French model and actress 1980 – Tácio Caetano Cruz Queiroz, Brazilian footballer 1980 – Seiichiro Maki, Japanese footballer 1981 – David Testo, American soccer player 1981 – Randy Wayne, American actor and producer 1982 – Ángeles Balbiani, Argentine actress and singer 1982 – Abbie Cornish, Australian actress 1982 – Juan Martín Hernández, Argentine rugby player 1982 – Marquise Hill, American football player (d. 2007) 1982 – Vassilis Spanoulis, Greek basketball player 1982 – Martin Vučić, Macedonian singer and drummer 1983 – Christian Chávez, Mexican singer-songwriter and actor 1983 – Murat Dalkılıç, Turkish singer-songwriter 1983 – Danny, Portuguese footballer 1983 – Andriy Hrivko, Ukrainian cyclist 1983 – Mark Pettini, English cricketer and journalist 1984 – Stratos Perperoglou, Greek basketball player 1984 – Tooba Siddiqui, Pakistani model and actress 1984 – Yun Hyon-seok, South Korean poet and author (d. 2003) 1986 – Paul Biedermann, German swimmer 1986 – Valter Birsa, Slovenian footballer 1986 – Altaír Jarabo, Mexican model and actress 1986 – Juan de la Rosa, Mexican boxer 1987 – Sidney Crosby, Canadian ice hockey player 1987 – Mustapha Dumbuya, Sierra Leonean footballer 1987 – Ryan Lavarnway, American baseball player 1987 – Rouven Sattelmaier, German footballer 1988 – Jonathan Bernier, Canadian ice hockey player 1988 – Mohamed Coulibaly, Senegalese footballer 1988 – Anisa Mohammed, West Indian cricketer 1988 – Melody Oliveria, American blogger 1988 – Erik Pieters, Dutch footballer 1988 – Beanie Wells, American football player 1989 – DeMar DeRozan, American basketball player 1990 – Josh Franceschi, English singer-songwriter 1991 – Luis Salom, Spanish motorcycle racer (d. 2016) 1991 – Mitchell te Vrede, Dutch footballer 1991 – Mike Trout, American baseball player 1992 – Adam Yates, English cyclist 1992 – Simon Yates, English cyclist 1992 – E. J. Tackett, American bowler 1992 – Wout Weghorst, Dutch footballer 1993 – Francesca Eastwood, American actress and television personality 1993 – Martti Nõmme, Estonian ski jumper 1993 – Karol Zalewski, Polish sprinter 1997 – Matty Cash, Polish footballer 1997 – Kyler Murray, American football player 1998 – Vladimir Barbu, Italian diver 1998 – María Bazo, Peruvian windsurfer 1998 – Jalen Hurts, American football player Deaths Pre-1600 461 – Majorian, Roman emperor (b. 420) 707 – Li Chongjun, Chinese prince 1028 – Alfonso V, king of León (b. 994) 1106 – Henry IV, Holy Roman Emperor (b. 1050) 1234 – Hugh Foliot, bishop of Hereford (b. c. 1155) 1272 – Richard Middleton, English Lord Chancellor 1296 – Heinrich II von Rotteneck, prince-bishop of Regensburg 1385 – Joan of Kent, mother of Richard II (b. 1328) 1485 – Alexander Stewart, duke of Albany (b. 1454) 1547 – Cajetan, Italian priest and saint (b. 1480) 1601–1900 1613 – Thomas Fleming, English judge and politician, Lord Chief Justice of England (b. 1544) 1616 – Vincenzo Scamozzi, Italian architect, designed Teatro Olimpico (b. 1548) 1632 – Robert de Vere, 19th Earl of Oxford, English soldier (b. 1575) 1635 – Friedrich Spee, German poet and academic (b. 1591) 1639 – Martin van den Hove, Dutch astronomer and mathematician (b. 1605) 1661 – Jin Shengtan, Chinese journalist and critic (b. 1608) 1787 – Francis Blackburne, English Anglican churchman and activist (b. 1705) 1817 – Pierre Samuel du Pont de Nemours, French economist and politician (b. 1739) 1834 – Joseph Marie Jacquard, French weaver and inventor, invented the Jacquard loom (b. 1752) 1848 – Jöns Jacob Berzelius, Swedish chemist and academic (b. 1779) 1855 – Mariano Arista, Mexican general and politician, 19th President of Mexico (b. 1802) 1864 – Li Xiucheng, Chinese field marshal (b. 1823) 1893 – Alfredo Catalani, Italian composer and academic (b. 1854) 1899 – Jacob Maris, Dutch painter and educator (b. 1837) 1900 – Wilhelm Liebknecht, German lawyer and politician (b. 1826) 1901–present 1912 – François-Alphonse Forel, Swiss limnologist and academic (b. 1841) 1917 – Edwin Harris Dunning, South African-English commander and pilot (b. 1891) 1938 – Konstantin Stanislavski, Russian actor and director (b. 1863) 1941 – Rabindranath Tagore, Indian author, poet, and playwright, Nobel Prize laureate (b. 1861) 1948 – Charles Bryant, English-American actor and director (b. 1879) 1953 – Abner Powell, American baseball player and manager (b. 1860) 1957 – Oliver Hardy, American actor, singer, and director (b. 1892) 1958 – Elizabeth Foreman Lewis, American author and educator (b. 1892) 1960 – Luis Ángel Firpo, Argentine boxer (b. 1894) 1963 – Ramon Vila Capdevila, last of the Spanish Maquis, holding out after the end of the Spanish Civil War (b. 1908) 1968 – Giovanni Bracco, Italian race car driver (b. 1908) 1969 – Jean Bastien, French professional footballer (b. 1915) 1969 – Joseph Kosma, Hungarian-French composer (b. 1905) 1970 – Harold Haley, American lawyer and judge (b. 1904) 1970 – Jonathan P. Jackson, American bodyguard and kidnapper (b. 1953) 1972 – Joi Lansing, American model, actress, and singer (b. 1929) 1973 – Jack Gregory, Australian cricketer (b. 1895) 1974 – Rosario Castellanos, Mexican poet and author (b. 1925) 1974 – Sylvio Mantha, Canadian ice hockey player and coach (b. 1902) 1978 – Eddie Calvert, English trumpeter (b. 1922) 1981 – Gunnar Uusi, Estonian chess player (b. 1931) 1985 – Grayson Hall, American actress (b. 1922) 1987 – Camille Chamoun, Lebanese lawyer and politician, 7th President of Lebanon (b. 1900) 1989 – Mickey Leland, American lawyer and politician (b. 1944) 1994 – Larry Martyn, English actor (b. 1934) 1995 – Brigid Brophy, English author and critic (b. 1929) 2001 – Algirdas Lauritėnas, Lithuanian basketball player (b. 1932) 2003 – K. D. Arulpragasam, Sri Lankan zoologist and academic (b. 1931) 2003 – Mickey McDermott, American baseball player and coach (b. 1929) 2004 – Red Adair, American firefighter (b. 1915) 2004 – Colin Bibby, English ornithologist and academic (b. 1948) 2005 – Peter Jennings, Canadian-American journalist and author (b. 1938) 2005 – Ester Šimerová-Martinčeková, Slovak painter (b. 1909) 2006 – Mary Anderson Bain, American lawyer and politician (b. 1911) 2007 – Ernesto Alonso, Mexican actor, director, and producer (b. 1917) 2007 – Angus Tait, New Zealand businessman, founded Tait Communications (b. 1919) 2008 – Bernie Brillstein, American talent agent and producer (b. 1931) 2008 – Andrea Pininfarina, Italian engineer and businessman (b. 1957) 2009 – Louis E. Saavedra, American educator and politician, 48th Mayor of Albuquerque (b. 1933) 2009 – Mike Seeger, American singer-songwriter (b. 1933) 2010 – John Nelder, English mathematician and statistician (b. 1924) 2011 – Mark Hatfield, American soldier, academic, and politician, 29th Governor of Oregon (b. 1922) 2011 – Nancy Wake, New Zealand-English captain and spy (b. 1912) 2012 – Murtuz Alasgarov, Azerbaijani academic and politician, Speaker of the National Assembly of Azerbaijan (b. 1928) 2012 – Judith Crist, American critic and academic (b. 1922) 2012 – Vladimir Kobzev, Russian footballer and coach (b. 1959) 2012 – Anna Piaggi, Italian journalist and author (b. 1931) 2012 – Mayer Zald, American sociologist and academic (b. 1931) 2012 – Dušan Zbavitel, Czech indologist and author (b. 1925) 2013 – Samuel G. Armistead, American linguist, historian, and academic (b. 1927) 2013 – Almir Kayumov, Russian footballer (b. 1964) 2013 – Anthony Pawson, English-Canadian biologist, chemist, and academic (b. 1952) 2013 – Margaret Pellegrini, American actress and dancer (b. 1923) 2013 – Meeli Truu, Estonian architect (b. 1946) 2013 – Alexander Yagubkin, Russian boxer (b. 1961) 2014 – Víctor Fayad, Argentine lawyer and politician (b. 1955) 2014 – Perry Moss, American football player and coach (b. 1926) 2014 – Henry Stone, American record producer (b. 1921) 2015 – Manuel Contreras, Chilean general (b. 1929) 2015 – Frances Oldham Kelsey, Canadian pharmacologist and physician (b. 1914) 2015 – Louise Suggs, American golfer, co-founded LPGA (b. 1923) 2016 – Bryan Clauson, American racing driver (b. 1989) 2017 – Don Baylor, American baseball player (b. 1949) 2017 – David Maslanka, American composer (b. 1943) 2018 – M. Karunanidhi, Indian politician, former Tamil Nadu Chief Minister and prominent leader of Tamils (b. 1924) 2018 – Stan Mikita, Slovak hockey player (b. 1940) 2019 – David Berman, American musician, singer, poet and cartoonist (b. 1967) 2020 – Lê Khả Phiêu, Vietnamese politician (b. 1931) 2021 – Markie Post, American actress (b. 1950) 2021 – Trevor Moore, American comedian (b. 1980) 2022 – David McCullough, American historian and author (b. 1933) 2023 – William Friedkin, American film director (b. 1935) Holidays and observances Assyrian Martyrs Day (Assyrian community) Battle of Boyacá Day (Colombia) Christian feast day: Albert of Trapani Cajetan of Thienna Carpophorus and companions Dometius of Persia Donatus of Arezzo Donatus of Besançon Donatus of Muenstereifel John Mason Neale and Catherine Winkworth (Episcopal Church (USA)) Nantovinus Pope Sixtus II August 7 (Eastern Orthodox liturgics) Filseta (Ethiopian and Eritrean Orthodox Tewahedo Church) Emancipation Day (Saint Kitts and Nevis) Republic Day (Ivory Coast) Youth Day (Kiribati) National Purple Heart Day (United States) References External links Days of the year August	5
The Americans with Disabilities Act of 1990 or ADA () is a civil rights law that prohibits discrimination based on disability. It affords similar protections against discrimination to Americans with disabilities as the Civil Rights Act of 1964, which made discrimination based on race, religion, sex, national origin, and other characteristics illegal, and later sexual orientation and gender identity. In addition, unlike the Civil Rights Act, the ADA also requires covered employers to provide reasonable accommodations to employees with disabilities, and imposes accessibility requirements on public accommodations. In 1986, the National Council on Disability had recommended the enactment of an Americans with Disabilities Act and drafted the first version of the bill which was introduced in the House and Senate in 1988. A broad bipartisan coalition of legislators supported the ADA, while the bill was opposed by business interests (who argued the bill imposed costs on business) and conservative evangelicals (who opposed protection for individuals with HIV). The final version of the bill was signed into law on July 26, 1990, by President George H. W. Bush. It was later amended in 2008 and signed by President George W. Bush with changes effective as of January 1, 2009. Disabilities included ADA disabilities include both mental and physical medical conditions. A condition does not need to be severe or permanent to be a disability. Equal Employment Opportunity Commission regulations provide a list of conditions that should easily be concluded to be disabilities: amputation, attention deficit hyperactivity disorder (ADHD), autism, bipolar disorder, blindness, cancer, cerebral palsy, deafness, diabetes, epilepsy, human immunodeficiency virus (HIV), intellectual disability (formerly termed mental retardation), major depressive disorder, mobility impairments (often requiring a wheelchair), multiple sclerosis, muscular dystrophy, obsessive–compulsive disorder (OCD), post-traumatic stress disorder (PTSD), and schizophrenia. Other mental or physical health conditions also may be disabilities, depending on what the individual's symptoms would be in the absence of "mitigating measures" (medication, therapy, assistive devices, or other means of restoring function), during an "active episode" of the condition (if the condition is episodic). Certain specific conditions that are widely considered anti-social, or tend to result in illegal activity, such as kleptomania, pedophilia, exhibitionism, voyeurism, etc. are excluded under the definition of "disability" in order to prevent abuse of the statute's purpose. Additionally, sexual orientation is no longer considered a disorder and is also excluded under the definition of "disability". However, in 2022, the United States Court of Appeals for the Fourth Circuit stated that the ADA covers individuals with gender dysphoria, which may aid transgender people in accessing legal protections they otherwise may be unable to. Titles Title I—employment See also US labor law and . The ADA states that a "covered entity" shall not discriminate against "a qualified individual with a disability". This applies to job application procedures, hiring, advancement and discharge of employees, job training, and other terms, conditions, and privileges of employment. "Covered entities" include employers with 15 or more employees, as well as employment agencies, labor organizations, and joint labor-management committees. There are strict limitations on when a covered entity can ask job applicants or employees disability-related questions or require them to undergo medical examination, and all medical information must be kept confidential. Prohibited discrimination may include, among other things, firing or refusing to hire someone based on a real or perceived disability, segregation, and harassment based on a disability. Covered entities are also required to provide reasonable accommodations to job applicants and employees with disabilities. A reasonable accommodation is a change in the way things are typically done that the person needs because of a disability, and can include, among other things, special equipment that allows the person to perform the job, scheduling changes, and changes to the way work assignments are chosen or communicated. An employer is not required to provide an accommodation that would involve undue hardship (excessive difficulty or expense), and the individual who receives the accommodation must still perform the essential functions of the job and meet the normal performance requirements. An employee or applicant who currently engages in the illegal use of drugs is not considered qualified when a covered entity takes adverse action based on such use. Part of Title I was found unconstitutional by the United States Supreme Court as it pertains to states in the case of Board of Trustees of the University of Alabama v. Garrett as violating the sovereign immunity rights of the several states as specified by the Eleventh Amendment to the United States Constitution. The Court determined that state employees cannot sue their employer for violating ADA rules. State employees can, however, file complaints at the Department of Justice or the Equal Employment Opportunity Commission, who can sue on their behalf. Title II—public entities (and public transportation) Title II prohibits disability discrimination by all public entities at the local level, e.g., school district, municipal, city, or county, and at state level. Public entities must comply with Title II regulations by the U.S. Department of Justice. These regulations cover access to all programs and services offered by the entity. Access includes physical access described in the ADA Standards for Accessible Design and programmatic access that might be obstructed by discriminatory policies or procedures of the entity. Title II applies to public transportation provided by public entities through regulations by the U.S. Department of Transportation. It includes the National Railroad Passenger Corporation (Amtrak), along with all other commuter authorities. This section requires the provision of paratransit services by public entities that provide fixed-route services. ADA also sets minimum requirements for space layout in order to facilitate wheelchair securement on public transport. Title II also applies to all state and local public housing, housing assistance, and housing referrals. The Office of Fair Housing and Equal Opportunity is charged with enforcing this provision. Title III—public accommodations (and commercial facilities) Under Title III, no individual may be discriminated against on the basis of disability with regards to the full and equal enjoyment of the goods, services, facilities, or accommodations of any place of public accommodation by any person who owns, leases, or operates a place of public accommodation. Public accommodations include most places of lodging (such as inns and hotels), recreation, transportation, education, and dining, along with stores, care providers, and places of public displays. Under Title III of the ADA, all new construction (construction, modification or alterations) after the effective date of the ADA (approximately July 1992) must be fully compliant with the Americans With Disabilities Act Accessibility Guidelines (ADAAG) found in the Code of Federal Regulations at 28 C.F.R., Part 36, Appendix A. Title III also has applications to existing facilities. One of the definitions of "discrimination" under Title III of the ADA is a "failure to remove" architectural barriers in existing facilities. See . This means that even facilities that have not been modified or altered in any way after the ADA was passed still have obligations. The standard is whether "removing barriers" (typically defined as bringing a condition into compliance with the ADAAG) is "readily achievable", defined as "...easily accomplished without much difficulty or expense". The statutory definition of "readily achievable" calls for a balancing test between the cost of the proposed "fix" and the wherewithal of the business and/or owners of the business. Thus, what might be "readily achievable" for a sophisticated and financially capable corporation might not be readily achievable for a small or local business. There are exceptions to this title; many private clubs and religious organizations may not be bound by Title III. With regard to historic properties (those properties that are listed or that are eligible for listing in the National Register of Historic Places, or properties designated as historic under state or local law), those facilities must still comply with the provisions of Title III of the ADA to the "maximum extent feasible" but if following the usual standards would "threaten to destroy the historic significance of a feature of the building" then alternative standards may be used. Under 2010 revisions of Department of Justice regulations, newly constructed or altered swimming pools, wading pools, and spas must have an accessible means of entrance and exit to pools for disabled people. However, the requirement is conditioned on whether providing access through a fixed lift is "readily achievable". Other requirements exist, based on pool size, include providing a certain number of accessible means of entry and exit, which are outlined in Section 242 of the standards. However, businesses are free to consider the differences in the application of the rules depending on whether the pool is new or altered, or whether the swimming pool was in existence before the effective date of the new rule. Full compliance may not be required for existing facilities; Section 242 and 1009 of the 2010 Standards outline such exceptions. Service animals The ADA provides explicit coverage for service animals. Guidelines have been developed not only to protect persons with disabilities but also to indemnify businesses from damages related to granting access to service animals on their premises. Businesses are allowed to ask if the animal is a service animal and ask what tasks it is trained to perform, but they are not allowed to ask the service animal to perform the task nor ask for a special ID of the animal. They cannot ask what the person's disabilities are. A person with a disability cannot be removed from the premises unless either of two things happen: the animal is out of control and its owner cannot get it under control (e.g. a dog barking uncontrollably in a restaurant), or the animal is a direct threat to people's health and safety. Allergies and fear of animals would not be considered a threat to people's health and safety, so it would not be a valid reason to deny access to people with service animals. Businesses that prepare or serve food must allow service animals and their owners on the premises even if state or local health laws otherwise prohibit animals on the premises. In this case, businesses that prepare or serve food are not required to provide care or food for service animals, nor do they have to provide a designated area for the service animal to relieve itself. Lastly, people that require service dogs cannot be charged an extra fee for their service dog or be treated unfairly, for example, being isolated from people at a restaurant. People with disabilities cannot be treated as "less than" other customers. However, if a business normally charges for damages caused by the person to property, the customer with a disability will be charged for their service animal's damages to the property. Auxiliary aids The ADA provides explicit coverage for auxiliary aids. Auxiliary aids and services are items, equipment or services that assist in effective communication between a person who has a hearing, vision or speech disability and a person who does not. ADA says that a public accommodation shall take those steps that may be necessary to ensure that no individual with a disability is excluded, denied services, segregated or otherwise treated differently than other individuals because of the absence of auxiliary aids and services, unless the public accommodation can demonstrate that taking those steps would fundamentally alter the nature of the goods, services, facilities, privileges, advantages, or accommodations being offered or would result in an undue burden, i.e., significant difficulty or expense. The term "auxiliary aids and services" includes: Qualified interpreters on-site or through video remote interpreting (VRI) services; notetakers; real-time computer-aided transcription services; written materials; exchange of written notes; telephone handset amplifiers; assistive listening devices; assistive listening systems; telephones compatible with hearing aids; closed caption decoders; open and closed captioning, including real-time captioning; voice, text, and video-based telecommunications products and systems, including text telephones (TTYs), videophones, and captioned telephones, or equally effective telecommunications devices; videotext displays; accessible electronic and information technology; or other effective methods of making aurally delivered information available to individuals who are deaf or hard of hearing; Qualified readers; taped texts; audio recordings; Brailled materials and displays; screen reader software; magnification software; optical readers; secondary auditory programs (SAP); large print materials; accessible electronic and information technology; or other effective methods of making visually delivered materials available to individuals who are blind or have low vision; Acquisition or modification of equipment or devices; and Other similar services and actions. Captions are considered one type of auxiliary aid. Since the passage of the ADA, the use of captioning has expanded. Entertainment, educational, informational, and training materials are captioned for deaf and hard-of-hearing audiences at the time they are produced and distributed. The Television Decoder Circuitry Act of 1990 requires that all televisions larger than 13 inches sold in the United States after July 1993 have a special built-in decoder that enables viewers to watch closed-captioned programming. The Telecommunications Act of 1996 directs the Federal Communications Commission (FCC) to adopt rules requiring closed captioning of most television programming. The FCC's rules on closed captioning became effective January 1, 1998. Title IV—telecommunications Title IV of the ADA amended the landmark Communications Act of 1934 primarily by adding section . This section requires that all telecommunications companies in the U.S. take steps to ensure functionally equivalent services for consumers with disabilities, notably those who are deaf or hard of hearing and those with speech impairments. When Title IV took effect in the early 1990s, it led to the installation of public teletypewriter (TTY) machines and other TDD (telecommunications devices for the deaf). Title IV also led to the creation, in all 50 states and the District of Columbia, of what was then called dual-party relay services and now are known as Telecommunications Relay Services (TRS), such as STS relay. Today, many TRS-mediated calls are made over the Internet by consumers who use broadband connections. Some are Video Relay Service (VRS) calls, while others are text calls. In either variation, communication assistants translate between the signed or typed words of a consumer and the spoken words of others. In 2006, according to the Federal Communications Commission (FCC), VRS calls averaged two million minutes a month. Title V—miscellaneous provisions Title V includes technical provisions. It discusses, for example, the fact that nothing in the ADA amends, overrides or cancels anything in Section 504. Additionally, Title V includes an anti-retaliation or coercion provision. The Technical Assistance Manual for the ADA explains this provision: History The ADA has roots in Section 504 of the Rehabilitation Act of 1973. Drafting In 1986, the National Council on Disability (NCD), an independent federal agency, issued a report, Towards Independence, in which the Council examined incentives and disincentives in federal laws towards increasing the independence and full integration of people with disabilities into U.S. society. Among the disincentives to independence the Council identified was the existence of large remaining gaps in civil rights coverage for people with disabilities in the United States. A principal conclusion of the report was to recommend the adoption of comprehensive civil rights legislation, which became the ADA. The idea of federal legislation enhancing and extending civil rights legislation to millions of Americans with disabilities gained bipartisan support in late 1988 and early 1989. In early 1989 both Congress and the newly inaugurated Bush White House worked separately, then jointly, to write legislation capable of expanding civil rights without imposing undue harm or costs on those already in compliance with existing rules and laws. Lobbying Over the years, key activists and advocates played an important role in lobbying members of the U.S. Congress to develop and pass the ADA, including Justin Whitlock Dart Jr., Patrisha Wright and others. Ms. Wright is known as "the General" for her work in coordinating the campaign to enact the ADA. She is widely considered the main force behind the campaign lobbying for the ADA. Support and opposition Support Senator Bob Dole was a supporter and advocate for the bill. About the importance of making employment opportunities inclusive, Shirley Davis, director of global diversity and inclusion at the Society for Human Resource Management, said: "People with disabilities represent a critical talent pool that is underserved and underutilized". Opposition from religious groups Conservative evangelicals opposed the ADA because the legislation protected individuals with HIV, which they associated with homosexuality. The debate over the Americans with Disabilities Act led some religious groups to take opposite positions. The Association of Christian Schools International opposed the ADA in its original form, primarily because the ADA labeled religious institutions "public accommodations" and thus would have required churches to make costly structural changes to ensure access for all. The cost argument advanced by ACSI and others prevailed in keeping religious institutions from being labeled as "public accommodations". Church groups such as the National Association of Evangelicals testified against the ADA's Title I employment provisions on grounds of religious liberty. The NAE believed the regulation of the internal employment of churches was "... an improper intrusion [of] the federal government." Opposition from business interests Many companies and corporations, and business groups, opposed the Americans with Disabilities Act, arguing that the legislation would impose costs on businesses. Testifying before Congress, Greyhound Bus Lines stated that the act had the potential to "deprive millions of people of affordable intercity public transportation and thousands of rural communities of their only link to the outside world." The US Chamber of Commerce argued that the costs of the ADA would be "enormous" and have "a disastrous impact on many small businesses struggling to survive." The National Federation of Independent Businesses, an organization that lobbies for small businesses, called the ADA "a disaster for small business". Pro-business conservative commentators joined in opposition, writing that the Americans with Disabilities Act was "an expensive headache to millions" that would not necessarily improve the lives of people with disabilities. "Capitol Crawl" Shortly before the act was passed, disability rights activists with physical disabilities coalesced in front of the Capitol Building, shed their crutches, wheelchairs, powerchairs and other assistive devices, and immediately proceeded to crawl and pull their bodies up all 100 of the Capitol's front steps, without warning. As the activists did so, many of them chanted "ADA now", and "Vote, Now". Some activists who remained at the bottom of the steps held signs and yelled words of encouragement at the "Capitol Crawlers". Jennifer Keelan, a second grader with cerebral palsy, was videotaped as she pulled herself up the steps, using mostly her hands and arms, saying "I'll take all night if I have to." This direct action is reported to have "inconvenienced" several senators and to have pushed them to approve the act. While there are those who do not attribute much overall importance to this action, the "Capitol Crawl" of 1990 is seen by some present-day disability activists in the United States as a central act for encouraging the ADA into law. Final passage Senator Tom Harkin (D-IA) authored what became the final bill and was its chief sponsor in the Senate. Harkin delivered part of his introduction speech in sign language, saying it was so his deaf brother could understand. George H. W. Bush, on signing the measure on July 26, 1990, said: ADA Amendments Act, 2008 The ADA defines a covered disability as a physical or mental impairment that substantially limits one or more major life activities, a history of having such an impairment, or being regarded as having such an impairment. The Equal Employment Opportunity Commission (EEOC) was charged with interpreting the 1990 law with regard to discrimination in employment. The EEOC developed regulations limiting an individual's impairment to one that "severely or significantly restricts" a major life activity. The ADAAA directed the EEOC to amend its regulations and replace "severely or significantly" with "substantially limits", a more lenient standard. On September 25, 2008, President George W. Bush signed the ADA Amendments Act of 2008 (ADAAA) into law. The amendment broadened the definition of "disability", thereby extending the ADA's protections to a greater number of people. The ADAAA also added to the ADA examples of "major life activities" including, but not limited to, "caring for oneself, performing manual tasks, seeing, hearing, eating, sleeping, walking, standing, lifting, bending, speaking, breathing, learning, reading, concentrating, thinking, communicating, and working" as well as the operation of several specified major bodily functions. The act overturned a 1999 US Supreme Court case that held that an employee was not disabled if the impairment could be corrected by mitigating measures; it specifically provides that such impairment must be determined without considering such ameliorative measures. It also overturned the court restriction that an impairment that substantially limits one major life activity must also limit others to be considered a disability. In 2008, the United States House Committee on Education and Labor stated that the amendment "makes it absolutely clear that the ADA is intended to provide broad coverage to protect anyone who faces discrimination on the basis of disability." Thus the ADAAA led to broader coverage of impaired employees. Web Content Accessibility Guidelines, 2019 In October 2019, the Supreme Court declined to resolve a circuit split as to whether websites are covered by the ADA. The Court turned down an appeal from Domino's Pizza and let stand a U.S. 9th Circuit Court of Appeals ruling which held that the Americans With Disabilities Act protects access not just to brick-and-mortar public accommodations, but also to the websites and apps of those businesses. Impact The ADA led to significant improvements in terms of access to public services, accessibility in the built environment, and societal understanding of disability. Accessibility Employment Between 1991 (after the enactment of the ADA) and 1995, the employment rate of men with disabilities dropped by 7.8% regardless of age, educational level, or type of disability, with the most affected being young, less-educated and intellectually disabled men. While no causal link between the ADA and that trend has been definitively identified, some researchers have characterized the ADA as ineffectual and argued that it caused this decline by raising the cost of doing business for employers, who quietly avoid hiring people with disabilities for fear of lawsuit. To these employers, hiring people with disabilities became too expensive as they had to spend extra on assistive technology. In 2001, for men of all working ages and women under 40, Current Population Survey data showed a sharp drop in the employment of disabled workers, leading at least two economists to attribute the cause to the Act. By contrast, a study in 2003 found that while the Act may have led to short term reactions by employers, in the long term, there were either positive or neutral consequences for wages and employment. In 2005, the rate of employment among disabled people increased to 45% of the population of disabled people. Societal attitudes "Professional plaintiffs" Since enforcement of the act began in July 1992, it has quickly become a major component of employment law. The ADA allows private plaintiffs to receive only injunctive relief (a court order requiring the public accommodation to remedy violations of the accessibility regulations) and attorneys' fees, and does not provide monetary rewards to private plaintiffs who sue non-compliant businesses. Unless a state law, such as the California Unruh Civil Rights Act, provides for monetary damages to private plaintiffs, persons with disabilities do not obtain direct financial benefits from suing businesses that violate the ADA. The attorneys' fees provision of Title III does provide incentive for lawyers to specialize and engage in serial ADA litigation, but a disabled plaintiff does not obtain a financial reward from attorneys' fees unless they act as their own attorney, or as mentioned above, a disabled plaintiff resides in a state that provides for minimum compensation and court fees in lawsuits. Moreover, there may be a benefit to these private attorneys general who identify and compel the correction of illegal conditions: they may increase the number of public accommodations accessible to persons with disabilities. "Civil rights law depends heavily on private enforcement. Moreover, the inclusion of penalties and damages is the driving force that facilitates voluntary compliance with the ADA." Courts have noted: However, in states that have enacted laws that allow private individuals to win monetary awards from non-compliant businesses (as of 2008, these include California, Florida, Hawaii, and Illinois), "professional plaintiffs" are typically found. At least one of these plaintiffs in California has been barred by courts from filing lawsuits unless he receives prior court permission. Through the end of fiscal year 1998, 86% of the 106,988 ADA charges filed with and resolved by the Equal Employment Opportunity Commission, were either dropped or investigated and dismissed by EEOC but not without imposing opportunity costs and legal fees on employers. Case law There have been some notable cases regarding the ADA. For example, a major hotel room marketer (Hotels.com) with their business presence on the Internet was sued because their customers with disabilities could not reserve hotel rooms through their website without substantial extra efforts that persons without disabilities were not required to perform. Such lawsuits represent a major potential expansion of the ADA in that they (known as "bricks vs. clicks"), seek to expand the ADA's authority to cyberspace, where entities may not have actual physical facilities that are required to comply. Green v. State of California Green v. State of California, No. S137770 (Cal. August 23, 2007) was a case in which the majority of the Supreme Court in California was faced with deciding whether the employee suing the state is required to prove they are able to perform "essential" job duties, regardless of whether or not there was "reasonable accommodation", or if the employer must prove the person suing was unable to do so. The court ruled the burden was on the employee, not the employer, and reversed a disputed decision by the courts. Plaintiff attorney David Greenberg brought forth considerations of the concept that, even in the state of California, employers do not have to employ a worker who is unable to perform "essential job functions" with "reasonable accommodation". Forcing employers to do so "would defy logic and establish a poor public policy in employment matters." National Federation of the Blind v. Target Corporation National Federation of the Blind v. Target Corp. was a case where a major retailer, Target Corp., was sued because their web designers failed to design its website to enable persons with low or no vision to use it. Board of Trustees of the University of Alabama v. Garrett Board of Trustees of the University of Alabama v. Garrett was a United States Supreme Court case about Congress's enforcement powers under the Fourteenth Amendment to the Constitution. It decided that Title I of the Americans with Disabilities Act was unconstitutional insofar as it allowed private citizens to sue states for money damages. Barden v. The City of Sacramento Barden v. The City of Sacramento, filed in March 1999, claimed that the City of Sacramento failed to comply with the ADA when, while making public street improvements, it did not bring its sidewalks into compliance with the ADA. Certain issues were resolved in Federal Court. One issue, whether sidewalks were covered by the ADA, was appealed to the 9th Circuit Court of Appeals, which ruled that sidewalks were a "program" under ADA and must be made accessible to persons with disabilities. The ruling was later appealed to the U.S. Supreme Court, which refused to hear the case, letting stand the ruling of the 9th Circuit Court. Bates v. United Parcel Service, Inc Bates v. United Parcel Service, Inc (UPS; begun in 1999) was the first equal opportunity employment class action brought on behalf of Deaf and Hard of Hearing (d/Deaf/HoH) workers throughout the country concerning workplace discrimination. It established legal precedence for d/Deaf/HoH Employees and Customers to be fully covered under the ADA. Key findings included UPS failed to address communication barriers and to ensure equal conditions and opportunities for deaf employees; Deaf employees were routinely excluded from workplace information, denied opportunities for promotion, and exposed to unsafe conditions due to lack of accommodations by UPS; UPS also lacked a system to alert these employees as to emergencies, such as fires or chemical spills, to ensure that they would safely evacuate their facility; and UPS had no policy to ensure that deaf applicants and employees actually received effective communication in the workplace. The outcome was that UPS agreed to pay a $5.8 million award and agreed to a comprehensive accommodations program that was implemented in their facilities throughout the country. Spector v. Norwegian Cruise Line Ltd. Spector v. Norwegian Cruise Line Ltd. was a case that was decided by the United States Supreme Court in 2005. The defendant argued that as a vessel flying the flag of a foreign nation it was exempt from the requirements of the ADA. This argument was accepted by a federal court in Florida and, subsequently, the Fifth Circuit Court of Appeals. However, the U.S. Supreme Court reversed the ruling of the lower courts on the basis that Norwegian Cruise Lines was a business headquartered in the United States whose clients were predominantly Americans and, more importantly, operated out of port facilities throughout the United States. Olmstead v. L.C. Olmstead v. L.C. was a case before the United States Supreme Court in 1999. The two plaintiffs, Lois Curtis and E.W., were institutionalized in Georgia for diagnosed "mental retardation" and schizophrenia. Clinical assessments by the state determined that the plaintiffs could be appropriately treated in a community setting rather than the state institution. The plaintiffs sued the state of Georgia and the institution for being inappropriately treated and housed in the institutional setting rather than being treated in one of the state's community-based treatment facilities. The Supreme Court decided under Title II of the ADA that mental illness is a form of disability and therefore covered under the ADA, and that unjustified institutional isolation of a person with a disability is a form of discrimination because it "...perpetuates unwarranted assumptions that persons so isolated are incapable or unworthy of participating in community life." The court added, "Confinement in an institution severely diminishes the everyday life activities of individuals, including family relations, social contacts, work options, economic independence, educational advancement, and cultural enrichment." Therefore, under Title II no person with a disability can be unjustly excluded from participation in or be denied the benefits of services, programs or activities of any public entity. Michigan Paralyzed Veterans of America v. The University of Michigan Michigan Paralyzed Veterans of America v. The University of Michigan was a case filed before The United States District Court for the Eastern District of Michigan Southern Division. It was filed on behalf of the Michigan Paralyzed Veterans of America against University of Michigan – Michigan Stadium claiming that Michigan Stadium violated the Americans with Disabilities Act in its $226-million renovation by failing to add enough seats for disabled fans or accommodate the needs for disabled restrooms, concessions and parking. Additionally, the distribution of the accessible seating was at issue, with nearly all the seats being provided in the end-zone areas. The U.S. Department of Justice assisted in the suit filed by attorney Richard Bernstein of The Law Offices of Sam Bernstein in Farmington Hills, Michigan, which was settled in March 2008. The settlement required the stadium to add 329 wheelchair seats throughout the stadium by 2010, and an additional 135 accessible seats in clubhouses to go along with the existing 88 wheelchair seats. This case was significant because it set a precedent for the uniform distribution of accessible seating and gave the DOJ the opportunity to clarify previously unclear rules. The agreement now is a blueprint for all stadiums and other public facilities regarding accessibility. Paralyzed Veterans of America v. Ellerbe Becket Architects and Engineers One of the first major ADA lawsuits, Paralyzed Veterans of America v. Ellerbe Becket Architects and Engineers (PVA 1996) was focused on the wheelchair accessibility of a stadium project that was still in the design phase, MCI Center (now known as Capital One Arena) in Washington, D.C. Previous to this case, which was filed only five years after the ADA was passed, the DOJ was unable or unwilling to provide clarification on the distribution requirements for accessible wheelchair locations in large assembly spaces. While Section 4.33.3 of ADAAG makes reference to lines of sight, no specific reference is made to seeing over standing patrons. The MCI Center, designed by Ellerbe Becket Architects & Engineers, was designed with too few wheelchair and companion seats, and the ones that were included did not provide sight lines that would enable the wheelchair user to view the playing area while the spectators in front of them were standing. This case and another related case established precedent on seat distribution and sight lines issues for ADA enforcement that continues to present day. Toyota Motor Manufacturing, Kentucky, Inc. v. Williams Toyota Motor Manufacturing, Kentucky, Inc. v. Williams, was a case in which the Supreme Court interpreted the meaning of the phrase "substantially impairs" as used in the Americans with Disabilities Act. It reversed a Sixth Court of Appeals decision to grant a partial summary judgment in favor of the respondent, Ella Williams, that qualified her inability to perform manual job-related tasks as a disability. The Court held that the "major life activity" definition in evaluating the performance of manual tasks focuses the inquiry on whether Williams was unable to perform a range of tasks central to most people in carrying out the activities of daily living. The issue is not whether Williams was unable to perform her specific job tasks. Therefore, the determination of whether an impairment rises to the level of a disability is not limited to activities in the workplace solely, but rather to manual tasks in life in general. When the Supreme Court applied this standard, it found that the Court of Appeals had incorrectly determined the presence of a disability because it relied solely on her inability to perform specific manual work tasks, which was insufficient in proving the presence of a disability. The Court of Appeals should have taken into account the evidence presented that Williams retained the ability to do personal tasks and household chores, such activities being the nature of tasks most people do in their daily lives, and placed too much emphasis on her job disability. Since the evidence showed that Williams was performing normal daily tasks, it ruled that the Court of Appeals erred when it found that Williams was disabled. This ruling has since been invalidated by the ADAAA. In fact, Congress explicitly cited Toyota v. Williams in the text of the ADAAA itself as one of its driving influences for passing the ADAAA. US Airways, Inc. v. Barnett US Airways, Inc. v. Barnett was decided by the US Supreme Court in 2002. This case held that even requests for accommodation that might seem reasonable on their face, e.g., a transfer to a different position, can be rendered unreasonable because it would require a violation of the company's seniority system. While the court held that, in general, a violation of a seniority system renders an otherwise reasonable accommodation unreasonable, a plaintiff can present evidence that, despite the seniority system, the accommodation is reasonable in the specific case at hand, e.g., the plaintiff could offer evidence that the seniority system is so often disregarded that another exception would not make a difference. Importantly, the court held that the defendant need not provide proof that this particular application of the seniority system should prevail, and that, once the defendant showed that the accommodation violated the seniority system, it fell to Barnett to show it was nevertheless reasonable. In this case, Barnett was a US Airways employee who injured his back, rendering him physically unable to perform his cargo-handling job. Invoking seniority, he transferred to a less-demanding mailroom job, but this position later became open to seniority-based bidding and was bid on by more senior employees. Barnett requested the accommodation of being allowed to stay on in the less-demanding mailroom job. US Airways denied his request, and he lost his job. The Supreme Court decision invalidated both the approach of the district court, which found that the mere presence and importance of the seniority system was enough to warrant a summary judgment in favor of US Airways, as well as the circuit court's approach that interpreted 'reasonable accommodation' as 'effective accommodation.' Access Now v. Southwest Airlines Access Now, Inc. v. Southwest Airlines Co. was a 2002 case where the District Court decided that the website of Southwest Airlines was not in violation of the Americans with Disabilities Act, because the ADA is concerned with things with a physical existence and thus cannot be applied to cyberspace. Judge Patricia A. Seitz found that the "virtual ticket counter" of the website was a virtual construct, and hence not a "public place of accommodation". As such, "To expand the ADA to cover 'virtual' spaces would be to create new rights without well-defined standards." Ouellette v. Viacom International Inc. Ouellette v. Viacom International Inc. (2011) held that a mere online presence does not subject a website to the ADA guidelines. Thus Myspace and YouTube were not liable for a dyslexic man's inability to navigate the site regardless of how impressive the "online theater" is. Authors Guild v. HathiTrust Authors Guild v. HathiTrust was a case in which the District Court decided that the HathiTrust digital library was a transformative, fair use of copyrighted works, making a large number of written text available to those with print disability. Zamora-Quezada v. HealthTexas Medical Group Zamora-Quezada v. HealthTexas Medical Group (begun in 1998) was the first time this act was used against HMOs when a novel lawsuit was filed by Texas attorney Robert Provan against five HMOs for their practice of revoking the contracts of doctors treating disabled patients. In 1999, these HMOs sought to dismiss Provan's lawsuit, but a federal court ruled against them, and the case was settled out of court. Many decisions relating to Provan's unique lawsuit against these HMOs have been cited in other court cases since. Campbell v. General Dynamics Government Systems Corp. Campbell v. General Dynamics Government Systems Corp. (2005) concerned the enforceability of a mandatory arbitration agreement, contained in a dispute resolution policy linked to an e-mailed company-wide announcement, insofar as it applies to employment discrimination claims brought under the Americans with Disabilities Act. Tennessee v. Lane Tennessee v. Lane, 541 U.S. 509 (2004), was a case in the Supreme Court of the United States involving Congress's enforcement powers under section 5 of the Fourteenth Amendment. George Lane was unable to walk after a 1997 car accident in which he was accused of driving on the wrong side of the road. A woman was killed in the crash, and Lane faced misdemeanor charges of reckless driving. The suit was brought about because he was denied access to appear in criminal court because the courthouse had no elevator, even though the court was willing to carry him up the stairs and then willing to move the hearing to the first floor. He refused, citing he wanted to be treated as any other citizen, and was subsequently charged with failure to appear, after appearing at a previous hearing where he dragged himself up the stairs. The court ruled that Congress did have enough evidence that disabled people were being denied those fundamental rights that are protected by the Due Process clause of the Fourteenth Amendment and had the enforcement powers under section 5 of the Fourteenth Amendment. It further ruled that "reasonable accommodations" mandated by the ADA were not unduly burdensome and disproportionate to the harm. Gender dysphoria In 2022, the United States Court of Appeals for the Fourth Circuit stated that the ADA covers individuals with gender dysphoria, which may aid transgender people in accessing legal protections they otherwise may be unable to. See also References Further reading Bush, George H. W., Remarks of President George Bush at the Signing of the Americans with Disabilities Act. Available online at Equal Employment Opportunity Commission. Davis, Lennard J. Enabling Acts. The Hidden Story of How the Americans with Disabilities Act Gave the Largest US Minority Its Rights. Boston, MA: Beacon Press, 2015. Fielder, J. F. Mental Disabilities and the Americans with Disabilities Act. Westport, CT: Quorum Books, 2004. Hamilton Krieger, Linda, ed., Backlash Against the ADA: Reinterpreting Disability Rights Ann Arbor: University of Michigan Press, 2003. Johnson, Mary. (2000). Make Them Go Away: Clint Eastwood, Christopher Reeve & the Case Against Disability Rights. Louisville, KY: The Advocado Press. Mayer, Arlene. (1992). The History of the Americans with Disabilities Act: A Movement Perspective. Available online at the Disability Rights Education & Defense Fund website O'Brien, Ruth, ed. Voices from the Edge: Narratives about the Americans with Disabilities Act. New York: Oxford, 2004. Pletcher, David and Ashlee Russeau-Pletcher. History of the Civil Rights Movement for the Physically Disabled Schall, Carol M. (Jun 1998). The Americans with Disabilities Act—Are We Keeping Our Promise? An Analysis of the Effect of the ADA on the Employment of Persons with Disabilities. Journal of Vocational Rehabilitation, v10 n3 pp. 191–203. Schwochau, Susan & Blanck, Peter David. The Economics of the Americans with Disabilities Act, Part III: Does the ADA Disable the Disabled? Berkeley Journal of Employment & Labor Law [Vol. 21:271] Switzer, Jacqueline Vaughn. Disabled Rights: American Disability Policy and the Fight for Equality. Washington, D.C.: Georgetown University Press, 2003. Weber, Mark C. Disability Harassment. New York: NYU Press, 2007. External links Department of Labor ADA page Equal Employment Opportunity Commission ADA page As codified in 42 U.S.C. chapter 126 of the United States Code from the US House of Representatives As codified in 42 U.S.C. chapter 126 of the United States Code from the LII Americans with Disabilities Act of 1990 (PDF/details) as amended in the GPO Statute Compilations collection Family Network on Disabilities FNDUSA.ORG—Florida Parent Training and Information Center funded by DOED Offices of Special Education Programs (OSEP) Lainey Feingold's Global Law and Policy: United States – federal (national) 101st United States Congress 1990 in American law Anti-discrimination law in the United States Civil rights in the United States Disability in law United States federal civil rights legislation United States federal disability legislation	16
The Apple Computer 1 (Apple-1), later known predominantly as the Apple I, is an 8-bit motherboard-only personal computer designed by Steve Wozniak and released by the Apple Computer Company (now Apple Inc.) in 1976. The company was initially formed to sell the Apple Iits first product and would later become the world's largest technology company. The idea of starting a company and selling the computer came from Wozniak's friend and Apple co-founder Steve Jobs. To finance its development, Wozniak and Jobs sold some of their possessions for a few hundred dollars. Wozniak demonstrated the first prototype in July 1976 at the Homebrew Computer Club in Palo Alto, California, impressing an early computer retailer. After securing an order for 50 computers, Jobs was able to order the parts on credit and deliver the first Apple products after ten days. The Apple I was one of the first computers available that used the inexpensive MOS Technology 6502 microprocessor. An expansion included a BASIC interpreter, allowing users to utilize BASIC at home instead of at institutions with mainframe computers, greatly lowering the entry cost for computing with BASIC. Production was discontinued on September 30, 1977, after the June 10, 1977 introduction of its successor, the Apple II, which Byte magazine referred to as part of the "1977 Trinity" of personal computing (along with the PET 2001 from Commodore Business Machines and the TRS-80 Model I from Tandy Corporation). As relatively few computers were made before they were discontinued, coupled with their status as Apple's first product, surviving Apple I units are now displayed in computer museums. History Development In 1975, Steve Wozniak started attending meetings of the Homebrew Computer Club, which was a major source of inspiration for him. New microcomputers such as the Altair 8800 and the IMSAI 8080 inspired Wozniak to build a microprocessor into his video terminal circuit to make a complete computer. At the time the only microcomputer CPUs generally available were the $179 Intel 8080 (), and the $170 Motorola 6800 (). Wozniak preferred the 6800, but both were out of his price range. So he watched, and learned, and designed computers on paper, waiting for the day he could afford a CPU. When MOS Technology released its $20 () 6502 chip in 1976, Wozniak wrote a version of BASIC for it, then began to design a computer for it to run on. The 6502 was designed by the same people who designed the 6800, as many in Silicon Valley left employers to form their own companies. Wozniak's earlier 6800 paper-computer needed only minor changes to run on the new chip. By March 1, 1976, Wozniak completed the basic design of his computer. Wozniak originally offered the design to HP while working there, but was denied by the company on five occasions. When he demonstrated his computer at the Homebrew Computer Club, his friend and fellow club regular Steve Jobs was immediately interested in its commercial potential. Wozniak intended to share schematics of the machine for free, but Jobs advised him to start a business together and sell bare printed circuit boards for the computer. Wozniak, at first skeptical, was later convinced by Jobs that even if they were not successful they could at least say to their grandchildren that they had had their own company. To raise the money they needed to build the first batch of the circuit boards, Wozniak sold his HP scientific calculator while Jobs sold his Volkswagen van. After the company was formed, Jobs and Wozniak made one last trip to the Homebrew Computer Club to give a presentation of the fully assembled "Apple Computer A". Paul Terrell, who was starting a new computer shop in Mountain View, California, called the Byte Shop, saw the presentation and was impressed by the machine. Terrell told Jobs that he would order 50 units of the Apple I and pay $500 () each on delivery, but only if they came fully assembledhe was not interested in buying bare printed circuit boards with no components. Jobs took the purchase order from the Byte Shop to national electronic parts distributor Cramer Electronics, and ordered the components needed. When asked by the credit manager how he would pay for the parts, Jobs replied, "I have this purchase order from the Byte Shop chain of computer stores for 50 of my computers and the payment terms are COD. If you give me the parts on net 30-day terms I can build and deliver the computers in that time frame, collect my money from Terrell at the Byte Shop and pay you." To verify the purchase order, the credit manager called Paul Terrell, who assured him if the computers showed up, Jobs would have more than enough money for the parts order. The two Steves and their small crew spent day and night building and testing the computers, and delivered to Terrell on time. Terrell was surprised to receive a batch of assembled circuit boards, as he had expected complete computers with a case, monitor and keyboard. Nonetheless, he kept his word and paid the two Steves the money promised. Announcement and sales The Apple I went on sale in July 1976 at a price of . Wozniak later said he had no idea about the relation between the number and the mark of the beast, and that he came up with the price because he liked "repeating digits" and because it was a one-third markup on the wholesale price. Jobs had managed to get the inventory into the nation's first four storefront microcomputer retailers: Byte Shop (Palo Alto, California), itty bitty machine company (Evanston, Illinois), Data Domain (Bloomington, Indiana), and Computer Mart (New York City). The first unit produced was used in a high school math class, and donated to Liza Loop's public-access computer center. About 200 units were produced, and all but 25 were sold within nine or ten months. In April 1977, the price was dropped to . It continued to be sold through August 1977, despite the introduction of the Apple II in April 1977, which began shipping in June of that year. In October 1977, the Apple I was officially discontinued and removed from Apple's price list. As Wozniak was the only person who could answer most customer support questions about the computer, the company offered Apple I owners discounts and trade-ins for Apple IIs to persuade them to return their computers. These recovered boards were then destroyed by Apple, contributing to their later rarity. Both Steve Jobs and Steve Wozniak have stated that Apple did not assign serial numbers to the Apple l. Several boards have been found with numbered stickers affixed to them, which appear to be inspection stickers from the PCB manufacturer/assembler. A batch of boards is known to have numbers hand-written in black permanent marker on the back; these usually appear as "01-00##". As of January 2022, 29 Apple-1s with a serial number are known. The highest known number is . Two original Apple-1s have been analyzed by PSA, Los Angeles, concluding the serial numbers had been hand-written by Steve Jobs. Hardware Wozniak's design originally used a Motorola 6800 processor, which cost $175, but when MOS Technology introduced the much cheaper 6502 microprocessor ($25) he switched. The Apple I CPU ran at , a fraction () of the NTSC color carrier which simplified video circuitry. Memory used the new 4-Kbit DRAM chips, and was , expandable to on board, or externally. The board was designed to use the next generation of 16-Kbit memory chips when they became available. An optional $75 plug-in cassette interface card allowed users to store programs on ordinary audio cassette tapes. A BASIC interpreter, originally written by Wozniak, was provided that let users easily write programs and play simple games. An onboard AC power supply was included. Video The Apple I's built-in computer terminal circuitry with TV composite output used shift register memory and a character generator. All one needed was a television set and a ASCII keyboard. The Apple I did not come with a case. It was either used as-is or some chose to build custom (mostly wooden) cases. Competing machines such as the Altair 8800 generally were programmed with front-mounted toggle switches and used indicator lights (red LEDs, most commonly) for output, and had to be extended with separate hardware to allow connection to a computer terminal or a teletypewriter machine. This made the Apple I, along with earlier introduced Sphere 1 and other hobbyist microcomputers, an innovative machine for its day. The computer used a Signetics 2513 64×8×5 Character Generator, capable of displaying uppercase characters, numbers and basic punctuation and math symbols with a 5x8 pixel font: Apple Cassette Interface expansion A cassette interface was available in the form of an optional add-on for the Apple I's expansion slot. A cassette deck plugged in to the expansion's phone connector ports could be written to and read from as a form of removable storage. The expansion came with a free cassette tape with an Apple BASIC interpreter, and other software tapes were supplied "at minimal cost" including ported video games such as Hamurabi, Lunar Lander and Star Trek. It is possible to save and play back recorded software using an iPod or other portable media player in place of a cassette deck. Conservation Only about 200 Apple I boards were produced, and the whereabouts of 62 to 82 are known. After the success of the Apple II, and of Apple broadly, the Apple I was recognized as an important historical computer; according to the 1986 Apple IIe Owner's Guide, an Apple I was worth "between $10,000 and $15,000" and a board was reportedly sold for $50,000 in 1999. In November 2010, an Apple I with a cache of original documents and packaging sold for £133,250 ($210,000) at Christie's auction house in London. The documents included the return label showing Steve Jobs's parents' address, a personally typed and signed letter from Jobs (answering technical questions about the computer), and the invoice (listing "Steven" as the salesman). The computer was brought to Polytechnic University of Turin for restoration. In October 2014 the Henry Ford Museum purchased an Apple I at a Bonhams auction for . The sale included the keyboard, monitor, cassette decks and a manual. In 2017, an Apple I removed from Steve Jobs's office in 1985 by Apple quality control engineer Don Hutmacher was placed on display at Living Computers: Museum + Labs. On May 30, 2015, an elderly woman reportedly dropped off boxes of electronics for disposal at an electronics recycling center in the Silicon Valley of Northern California. Included in the electronics (removed from her garage after the death of her husband) was an original Apple I computer, which the recycling firm sold for . When a discarded item is sold, it is the company's practice to give 50% of the proceeds to the original owner, but the woman has not been identified. Apple I computers with original documents and memorabilia have frequently been auctioned for over $300,000 throughout the 2010s and 2020s. The production prototype for the Apple I survives in a badly damaged state and was itself auctioned in 2022 for $677,196. Emulation Several Apple I clones and replicas have been released in recent years. These are created by hobbyists and marketed to the hobbyist/collector community. Availability is usually limited to small runs in response to demand. Emulation software for the Apple I has been written for modern home computers and for web browsers. It has also been emulated on 1980s era computers including the SAM Coupé and Commodore 64. See also Computer museum History of computer science History of computing KIM-1 Notes References Citations Sources Owad, Tom (2005). Apple I Replica Creation: Back to the Garage . Rockland, Mass.: Syngress Publishing. . Price, Rob (1987). So Far: The First Ten Years of a Vision. Cupertino, Calif.: Apple Computer. . External links Apple I Computer specifications Bugbook Computer Museum blog. Apple 1 display. Apple I Owners Club Apple I Operational Manual (browse) German making-of article to recreate the Apple I Operational Manual Apple I project on www.sbprojects.com Apple 1 Computer Registry Macintosh Prehistory: The Apple I John Calande III blog – Building the Apple I clone, including corrections on the early history of Apple Computer Apple 1 \| Cameron's Closet – includes display of the Apple 1's character set on real hardware, compared to on most emulators Computer-related introductions in 1976 Apple II family Apple Inc. hardware Early microcomputers 6502-based home computers Products and services discontinued in 1977 Discontinued Apple Inc. products Steve Jobs	8
Apatosaurus (; meaning "deceptive lizard") is a genus of herbivorous sauropod dinosaur that lived in North America during the Late Jurassic period. Othniel Charles Marsh described and named the first-known species, A. ajax, in 1877, and a second species, A. louisae, was discovered and named by William H. Holland in 1916. Apatosaurus lived about 152 to 151 million years ago (mya), during the late Kimmeridgian to early Tithonian age, and are now known from fossils in the Morrison Formation of modern-day Colorado, Oklahoma, New Mexico, Wyoming, and Utah in the United States. Apatosaurus had an average length of , and an average mass of . A few specimens indicate a maximum length of 11–30% greater than average and a mass of approximately . The cervical vertebrae of Apatosaurus are less elongated and more heavily constructed than those of Diplodocus, a diplodocid like Apatosaurus, and the bones of the leg are much stockier despite being longer, implying that Apatosaurus was a more robust animal. The tail was held above the ground during normal locomotion. Apatosaurus had a single claw on each forelimb and three on each hindlimb. The Apatosaurus skull, long thought to be similar to Camarasaurus, is much more similar to that of Diplodocus. Apatosaurus was a generalized browser that likely held its head elevated. To lighten its vertebrae, Apatosaurus had air sacs that made the bones internally full of holes. Like that of other diplodocids, its tail may have been used as a whip to create loud noises, or, as more recently suggested, as a sensory organ. The skull of Apatosaurus was confused with that of Camarasaurus and Brachiosaurus until 1909, when the holotype of A. louisae was found, and a complete skull just a few meters away from the front of the neck. Henry Fairfield Osborn disagreed with this association, and went on to mount a skeleton of Apatosaurus with a Camarasaurus skull cast. Apatosaurus skeletons were mounted with speculative skull casts until 1970, when McIntosh showed that more robust skulls assigned to Diplodocus were more likely from Apatosaurus. Apatosaurus is a genus in the family Diplodocidae. It is one of the more basal genera, with only Amphicoelias and possibly a new, unnamed genus more primitive. Although the subfamily Apatosaurinae was named in 1929, the group was not used validly until an extensive 2015 study. Only Brontosaurus is also in the subfamily, with the other genera being considered synonyms or reclassified as diplodocines. Brontosaurus has long been considered a junior synonym of Apatosaurus; its type species was reclassified as A.excelsus in 1903. A 2015 study concluded that Brontosaurus is a valid genus of sauropod distinct from Apatosaurus, but not all paleontologists agree with this division. As it existed in North America during the late Jurassic, Apatosaurus would have lived alongside dinosaurs such as Allosaurus, Camarasaurus, Diplodocus, and Stegosaurus. Description Apatosaurus was a large, long-necked, quadrupedal animal with a long, whip-like tail. Its forelimbs were slightly shorter than its hindlimbs. Most size estimates are based on specimen CM3018, the type specimen of A.louisae, reaching in length and in body mass. A 2015 study that estimated the mass of volumetric models of Dreadnoughtus, Apatosaurus, and Giraffatitan estimates CM3018 at , similar in mass to Dreadnoughtus. Some specimens of A.ajax (such as OMNH1670) represent individuals 1130% longer, suggesting masses twice that of CM3018 or , potentially rivaling the largest titanosaurs. However, the upper size estimate of OMNH1670 is likely an exaggeration, with the size estimates revised in 2020 at in length and in body mass based on volumetric analysis. The skull is small in relation to the size of the animal. The jaws are lined with spatulate (chisel-like) teeth suited to an herbivorous diet. The snout of Apatosaurus and similar diplodocoids is squared, with only Nigersaurus having a squarer skull. The braincase of Apatosaurus is well preserved in specimen BYU17096, which also preserved much of the skeleton. A phylogenetic analysis found that the braincase had a morphology similar to those of other diplodocoids. Some skulls of Apatosaurus have been found still in articulation with their teeth. Those teeth that have the enamel surface exposed do not show any scratches on the surface; instead, they display a sugary texture and little wear. Like those of other sauropods, the neck vertebrae are deeply bifurcated; they carried neural spines with a large trough in the middle, resulting in a wide, deep neck. The vertebral formula for the holotype of A.louisae is 15cervicals, 10dorsals, 5sacrals, and 82caudals. The caudal vertebra number may vary, even within species. The cervical vertebrae of Apatosaurus and Brontosaurus are stouter and more robust than those of other diplodocids and were found to be most similar to Camarasaurus by Charles Whitney Gilmore. In addition, they support cervical ribs that extend farther towards the ground than in diplodocines, and have vertebrae and ribs that are narrower towards the top of the neck, making the neck nearly triangular in cross-section. In Apatosaurus louisae, the atlas-axis complex of the first cervicals is nearly fused. The dorsal ribs are not fused or tightly attached to their vertebrae and are instead loosely articulated. Apatosaurus has ten dorsal ribs on either side of the body. The large neck was filled with an extensive system of weight-saving air sacs. Apatosaurus, like its close relative Supersaurus, has tall neural spines, which make up more than half the height of the individual bones of its vertebrae. The shape of the tail is unusual for a diplodocid; it is comparatively slender because of the rapidly decreasing height of the vertebral spines with increasing distance from the hips. Apatosaurus also had very long ribs compared to most other diplodocids, giving it an unusually deep chest. As in other diplodocids, the tail transformed into a whip-like structure towards the end. The limb bones are also very robust. Within Apatosaurinae, the scapula of Apatosaurus louisae is intermediate in morphology between those of A.ajax and Brontosaurus excelsus. The arm bones are stout, so the humerus of Apatosaurus resembles that of Camarasaurus, as well as Brontosaurus. However, the humeri of Brontosaurus and A.ajax are more similar to each other than they are to A.louisae. In 1936, Charles Gilmore noted that previous reconstructions of Apatosaurus forelimbs erroneously proposed that the radius and ulna could cross; in life they would have remained parallel. Apatosaurus had a single large claw on each forelimb, a feature shared by all sauropods more derived than Shunosaurus. The first three toes had claws on each hindlimb. The phalangeal formula is 2-1-1-1-1, meaning the innermost finger (phalanx) on the forelimb has two bones and the next has one. The single manual claw bone (ungual) is slightly curved and squarely truncated on the anterior end. The pelvic girdle includes the robust ilia, and the fused (co-ossified) pubes and ischia. The femora of Apatosaurus are very stout and represent some of the most robust femora of any member of Sauropoda. The tibia and fibula bones are different from the slender bones of Diplodocus but are nearly indistinguishable from those of Camarasaurus. The fibula is longer and slenderer than the tibia. The foot of Apatosaurus has three claws on the innermost digits; the digit formula is 3-4-5-3-2. The first metatarsal is the stoutest, a feature shared among diplodocids. Discovery and species Initial discovery The first Apatosaurus fossils were discovered by Arthur Lakes, a local miner, and his friend Henry C. Beckwith in the spring of 1877 in Morrison, a town in the eastern foothills of the Rocky Mountains in Jefferson County, Colorado. Arthur Lakes wrote to Othniel Charles Marsh, Professor of Paleontology at Yale University, and Edward Drinker Cope, paleontologist based in Philadelphia, about the discovery until eventually collecting several fossils and sending them to both paleontologists. Marsh named Atlantosaurus montanus based on some of the fossils sent and hired Lakes to collect the rest of the material at Morrison and send it to Yale, while Cope attempted to hire Lakes as well but was rejected. One of the best specimens collected by Lakes in 1877 was a well preserved partial postcranial skeleton, including many vertebrae, and a partial braincase (YPM VP 1860), which was sent to Marsh and named Apatosaurus ajax in November 1877. The composite term Apatosaurus comes from the Greek words ()/ () meaning "deception"/"deceptive", and () meaning "lizard"; thus, "deceptive lizard". Marsh gave it this name based on the chevron bones, which are dissimilar to those of other dinosaurs; instead, the chevron bones of Apatosaurus showed similarities with those of mosasaurs, most likely that of the representative species Mosasaurus. By the end of excavations at Lakes' quarry in Morrison, several partial specimens of Apatosaurus had been collected, but only the type specimen of A. ajax can be confidently referred to the species. During excavation and transportation, the bones of the holotype skeleton were mixed with those of another Apatosaurine individual originally described as Atlantosaurus immanis; as a consequence, some elements cannot be ascribed to either specimen with confidence. Marsh distinguished the new genus Apatosaurus from Atlantosaurus on the basis of the number of sacral vertebrae, with Apatosaurus possessing three and Atlantosaurus four. Recent research shows that traits usually used to distinguish taxa at this time were actually widespread across several taxa, causing many of the taxa named to be invalid, like Atlantosaurus. Two years later, Marsh announced the discovery of a larger and more complete specimen (YPM VP 1980) from Como Bluff, Wyoming, he gave this specimen the name Brontosaurus excelsus. Also at Como Bluff, the Hubbell brothers working for Edward Drinker Cope collected a tibia, fibula, scapula, and several caudal vertebrae along with other fragments belonging to Apatosaurus in 1877–78 at Cope's Quarry 5 at the site. Later in 1884, Othniel Marsh named Diplodocus lacustris based on a chimeric partial dentary, snout, and several teeth collected by Lakes in 1877 at Morrison. In 2013, it was suggested that the dentary of D. lacustris and its teeth were actually from Apatosaurus ajax based on its proximity to the type braincase of A. ajax. All specimens currently considered Apatosaurus were from the Morrison Formation, the location of the excavations of Marsh and Cope. Second Dinosaur Rush and skull issue After the end of the Bone Wars, many major institutions in the eastern United States were inspired by the depictions and finds by Marsh and Cope to assemble their own dinosaur fossil collections. The competition to mount the first sauropod skeleton specifically was the most intense, with the American Museum of Natural History, Carnegie Museum of Natural History, and Field Museum of Natural History all sending expeditions to the west to find the most complete sauropod specimen, bring it back to the home institution, and mount it in their fossil halls. The American Museum of Natural History was the first to launch an expedition, finding a well preserved skeleton (AMNH 460), which is occasionally assigned to Apatosaurus, is considered nearly complete; only the head, feet, and sections of the tail are missing, and it was the first sauropod skeleton mounted. The specimen was found north of Medicine Bow, Wyoming, in 1898 by Walter Granger, and took the entire summer to extract. To complete the mount, sauropod feet that were discovered at the same quarry and a tail fashioned to appear as Marsh believed it shouldbut which had too few vertebraewere added. In addition, a sculpted model of what the museum thought the skull of this massive creature might look like was made. This was not a delicate skull like that of Diplodocuswhich was later found to be more accuratebut was based on "the biggest, thickest, strongest skull bones, lower jaws and tooth crowns from three different quarries". These skulls were likely those of Camarasaurus, the only other sauropod for which good skull material was known at the time. The mount construction was overseen by Adam Hermann, who failed to find Apatosaurus skulls. Hermann was forced to sculpt a stand-in skull by hand. Osborn said in a publication that the skull was "largely conjectural and based on that of Morosaurus" (now Camarasaurus). In 1903, Elmer Riggs published a study that described a well-preserved skeleton of a diplodocid from the Grand River Valley near Fruita, Colorado, Field Museum of Natural History specimen P25112. Riggs thought that the deposits were similar in age to those of the Como Bluff in Wyoming from which Marsh had described Brontosaurus. Most of the skeleton was found, and after comparison with both Brontosaurus and Apatosaurus ajax, Riggs realized that the holotype of A.ajax was immature, and thus the features distinguishing the genera were not valid. Since Apatosaurus was the earlier name, Brontosaurus should be considered a junior synonym of Apatosaurus. Because of this, Riggs recombined Brontosaurus excelsus as Apatosaurus excelsus. Based on comparisons with other species proposed to belong to Apatosaurus, Riggs also determined that the Field Columbian Museum specimen was likely most similar to A.excelsus. Despite Riggs' publication, Henry Fairfield Osborn, who was a strong opponent of Marsh and his taxa, labeled the Apatosaurus mount of the American Museum of Natural History Brontosaurus. Because of this decision the name Brontosaurus was commonly used outside of scientific literature for what Riggs considered Apatosaurus, and the museum's popularity meant that Brontosaurus became one of the best known dinosaurs, even though it was invalid throughout nearly all of the 20th and early 21st centuries. It was not until 1909 that an Apatosaurus skull was found during the first expedition, led by Earl Douglass, to what would become known as the Carnegie Quarry at Dinosaur National Monument. The skull was found a short distance from a skeleton (specimen CM3018) identified as the new species Apatosaurus louisae, named after Louise Carnegie, wife of Andrew Carnegie, who funded field research to find complete dinosaur skeletons in the American West. The skull was designated CM11162; it was very similar to the skull of Diplodocus. Another smaller skeleton of A.louisae was found nearby CM11162 and CM3018. The skull was accepted as belonging to the Apatosaurus specimen by Douglass and Carnegie Museum director William H. Holland, although other scientistsmost notably Osbornrejected this identification. Holland defended his view in 1914 in an address to the Paleontological Society of America, yet he left the Carnegie Museum mount headless. While some thought Holland was attempting to avoid conflict with Osborn, others suspected Holland was waiting until an articulated skull and neck were found to confirm the association of the skull and skeleton. After Holland's death in 1934, museum staff placed a cast of a Camarasaurus skull on the mount. While most other museums were using cast or sculpted Camarasaurus skulls on Apatosaurus mounts, the Yale Peabody Museum decided to sculpt a skull based on the lower jaw of a Camarasaurus, with the cranium based on Marsh's 1891 illustration of the skull. The skull also included forward-pointing nasalssomething unusual for any dinosaurand fenestrae differing from both the drawing and other skulls. No Apatosaurus skull was mentioned in literature until the 1970s when John Stanton McIntosh and David Berman redescribed the skulls of Diplodocus and Apatosaurus. They found that though he never published his opinion, Holland was almost certainly correct, that Apatosaurus had a Diplodocus-like skull. According to them, many skulls long thought to pertain to Diplodocus might instead be those of Apatosaurus. They reassigned multiple skulls to Apatosaurus based on associated and closely associated vertebrae. Even though they supported Holland, it was noted that Apatosaurus might have possessed a Camarasaurus-like skull, based on a disarticulated Camarasaurus-like tooth found at the precise site where an Apatosaurus specimen was found years before. On October20, 1979, after the publications by McIntosh and Berman, the first true skull of Apatosaurus was mounted on a skeleton in a museum, that of the Carnegie. In 1998, it was suggested that the Felch Quarry skull that Marsh had included in his 1896 skeletal restoration instead belonged to Brachiosaurus. Recent discoveries and reassesment In 2011, the first specimen of Apatosaurus where a skull was found articulated with its cervical vertebrae was described. This specimen, CMCVP7180, was found to differ in both skull and neck features from A.louisae, but shared many features of the cervical vertebrae with A.ajax. Another well-preserved skull is Brigham Young University specimen 17096, a well-preserved skull and skeleton, with a preserved braincase. The specimen was found in Cactus Park Quarry in western Colorado. In 2013, Matthew Mossbrucker and several other authors published an abstract that described a premaxilla and maxilla from Lakes' original quarry in Morrison and referred the material to Apatosaurus ajax. Almost all modern paleontologists agreed with Riggs that the two dinosaurs should be classified together in a single genus. According to the rules of the ICZN (which governs the scientific names of animals), the name Apatosaurus, having been published first, has priority as the official name; Brontosaurus was considered a junior synonym and was therefore long discarded from formal use. Despite this, at least one paleontologistRobert T. Bakkerargued in the 1990s that A.ajax and A.excelsus were in fact sufficiently distinct for the latter to merit a separate genus. In 2015, Emanuel Tschopp, Octávio Mateus, and Roger Benson released a paper on diplodocoid systematics, and proposed that genera could be diagnosed by thirteen differing characters, and species separated based on six. The minimum number for generic separation was chosen based on the fact that A.ajax and A.louisae differ in twelve characters, and Diplodocus carnegiei and D.hallorum differ in eleven characters. Thus, thirteen characters were chosen to validate the separation of genera. The six differing features for specific separation were chosen by counting the number of differing features in separate specimens generally agreed to represent one species, with only one differing character in D.carnegiei and A.louisae, but five differing features in B.excelsus. Therefore, Tschopp etal. argued that Apatosaurus excelsus, originally classified as Brontosaurus excelsus, had enough morphological differences from other species of Apatosaurus that it warranted being reclassified as a separate genus again. The conclusion was based on a comparison of 477 morphological characteristics across 81 different dinosaur individuals. Among the many notable differences are the widerand presumably strongerneck of Apatosaurus species compared to B.excelsus. Other species previously assigned to Apatosaurus, such as Elosaurus parvus and Eobrontosaurus yahnahpin were also reclassified as Brontosaurus. Some features proposed to separate Brontosaurus from Apatosaurus include: posterior dorsal vertebrae with the centrum longer than wide; the scapula rear to the acromial edge and the distal blade being excavated; the acromial edge of the distal scapular blade bearing a rounded expansion; and the ratio of the proximodistal length to transverse breadth of the astragalus 0.55 or greater. Sauropod expert Michael D'Emic pointed out that the criteria chosen were to an extent arbitrary and that they would require abandoning the name Brontosaurus again if newer analyses obtained different results. Mammal paleontologist Donald Prothero criticized the mass media reaction to this study as superficial and premature, concluding that he would keep "Brontosaurus" in quotes and not treat the name as a valid genus. Valid species Many species of Apatosaurus have been designated from scant material. Marsh named as many species as he could, which resulted in many being based upon fragmentary and indistinguishable remains. In 2005, Paul Upchurch and colleagues published a study that analyzed the species and specimen relationships of Apatosaurus. They found that A.louisae was the most basal species, followed by FMNHP25112, and then a polytomy of A.ajax, A.parvus, and A.excelsus. Their analysis was revised and expanded with many additional diplodocid specimens in 2015, which resolved the relationships of Apatosaurus slightly differently, and also supported separating Brontosaurus from Apatosaurus. Apatosaurus ajax was named by Marsh in 1877 after Ajax, a hero from Greek mythology. Marsh designated the incomplete, juvenile skeleton YPM1860 as its holotype. The species is less studied than Brontosaurus and A.louisae, especially because of the incomplete nature of the holotype. In 2005, many specimens in addition to the holotype were found assignable to A.ajax, YPM1840, NSMT-PV 20375, YPM1861, and AMNH460. The specimens date from the late Kimmeridgian to the early Tithonian ages. In 2015, only the A.ajax holotype YPM1860 assigned to the species, with AMNH460 found either to be within Brontosaurus, or potentially its own taxon. However, YPM1861 and NSMT-PV 20375 only differed in a few characteristics, and cannot be distinguished specifically or generically from A.ajax. YPM1861 is the holotype of "Atlantosaurus" immanis, which means it might be a junior synonym of A.ajax. Apatosaurus louisae was named by Holland in 1916, being first known from a partial skeleton that was found in Utah. The holotype is CM3018, with referred specimens including CM3378, CM11162, and LACM52844. The former two consist of a vertebral column; the latter two consist of a skull and a nearly complete skeleton, respectively. Apatosaurus louisae specimens all come from the late Kimmeridgian of Dinosaur National Monument. In 2015, Tschopp etal. found the type specimen of Apatosaurus laticollis to nest closely with CM3018, meaning the former is likely a junior synonym of A.louisae. The cladogram below is the result of an analysis by Tschopp, Mateus, and Benson (2015). The authors analyzed most diplodocid type specimens separately to deduce which specimen belonged to which species and genus. Reassigned species Apatosaurus grandis was named in 1877 by Marsh in the article that described A.ajax. It was briefly described, figured, and diagnosed. Marsh later mentioned it was only provisionally assigned to Apatosaurus when he reassigned it to his new genus Morosaurus in 1878. Since Morosaurus has been considered a synonym of Camarasaurus, C.grandis is the oldest-named species of the latter genus. Apatosaurus excelsus was the original type species of Brontosaurus, first named by Marsh in 1879. Elmer Riggs reclassified Brontosaurus as a synonym of Apatosaurus in 1903, transferring the species B.excelsus to A.excelsus. In 2015, Tschopp, Mateus, and Benson argued that the species was distinct enough to be placed in its own genus, so they reclassified it back into Brontosaurus. Apatosaurus parvus, first described from a juvenile specimen as Elosaurus in 1902 by Peterson and Gilmore, was reassigned to Apatosaurus in 1994, and then to Brontosaurus in 2015. Many other, more mature specimens were assigned to it following the 2015 study. Apatosaurus minimus was originally described as a specimen of Brontosaurus sp. in 1904 by Osborn. In 1917, Henry Mook named it as its own species, A.minimus, for a pair of ilia and their sacrum. In 2012, Mike P. Taylor and Matt J. Wedel published a short abstract describing the material of A. minimus, finding it hard to place among either Diplodocoidea or Macronaria. While it was placed with Saltasaurus in a phylogenetic analysis, it was thought to represent instead some form with convergent features from many groups. The study of Tschopp etal. did find that a camarasaurid position for the taxon was supported, but noted that the position of the taxon was found to be highly variable and there was no clearly more likely position. Apatosaurus alenquerensis was named in 1957 by Albert-Félix de Lapparent and Georges Zbyweski. It was based on post cranial material from Portugal. In 1990, this material was reassigned to Camarasaurus, but in 1998 it was given its own genus, Lourinhasaurus. This was further supported by the findings of Tschopp etal. in 2015, where Lourinhasaurus was found to be sister to Camarasaurus and other camarasaurids. Apatosaurus yahnahpin was named by James Filla and Patrick Redman in 1994. Bakker made A.yahnahpin the type species of a new genus, Eobrontosaurus in 1998, and Tschopp reclassified it as Brontosaurus yahnahpin in 2015. Classification Apatosaurus is a member of the family Diplodocidae, a clade of gigantic sauropod dinosaurs. The family includes some of the longest creatures ever to walk the earth, including Diplodocus, Supersaurus, and Barosaurus. Apatosaurus is sometimes classified in the subfamily Apatosaurinae, which may also include Suuwassea, Supersaurus, and Brontosaurus. Othniel Charles Marsh described Apatosaurus as allied to Atlantosaurus within the now-defunct group Atlantosauridae. In 1878, Marsh raised his family to the rank of suborder, including Apatosaurus, Atlantosaurus, Morosaurus (=Camarasaurus) and Diplodocus. He classified this group within Sauropoda, a group he erected in the same study. In 1903, Elmer S. Riggs said the name Sauropoda would be a junior synonym of earlier names; he grouped Apatosaurus within Opisthocoelia. Sauropoda is still used as the group name. In 2011, John Whitlock published a study that placed Apatosaurus a more basal diplodocid, sometimes less basal than Supersaurus. Cladogram of the Diplodocidae after Tschopp, Mateus, and Benson (2015). Paleobiology It was believed throughout the 19th and early 20th centuries that sauropods like Apatosaurus were too massive to support their own weight on dry land. It was theorized that they lived partly submerged in water, perhaps in swamps. More recent findings do not support this; sauropods are now thought to have been fully terrestrial animals. A study of diplodocid snouts showed that the square snout, large proportion of pits, and fine, subparallel scratches of the teeth of Apatosaurus suggests it was a ground-height, nonselective browser. It may have eaten ferns, cycadeoids, seed ferns, horsetails, and algae. Stevens and Parish (2005) speculate that these sauropods fed from riverbanks on submerged water plants. A 2015 study of the necks of Apatosaurus and Brontosaurus found many differences between them and other diplodocids, and that these variations may have shown that the necks of Apatosaurus and Brontosaurus were used for intraspecific combat. Various uses for the single claw on the forelimb of sauropods have been proposed. One suggestion is that they were used for defense, but their shape and size make this unlikely. It was also possible they were for feeding, but the most probable use for the claw was grasping objects such as tree trunks when rearing. Trackways of sauropods like Apatosaurus show that they may have had a range of around per day, and that they could potentially have reached a top speed of per hour. The slow locomotion of sauropods may be due to their minimal muscling, or to recoil after strides. A trackway of a juvenile has led some to believe that they were capable of bipedalism, though this is disputed. Neck posture Diplodocids like Apatosaurus are often portrayed with their necks held high up in the air, allowing them to browse on tall trees. Some studies state diplodocid necks were less flexible than previously believed, because the structure of the neck vertebrae would not have allowed the neck to bend far upward, and that sauropods like Apatosaurus were adapted to low browsing or ground feeding. Other studies by Taylor find that all tetrapods appear to hold their necks at the maximum possible vertical extension when in a normal, alert posture; they argue the same would hold true for sauropods barring any unknown, unique characteristics that set the soft tissue anatomy of their necks apart from that of other animals. Apatosaurus, like Diplodocus, would have held its neck angled upward with the head pointing downward in a resting posture. Kent Stevens and Michael Parrish (1999 and 2005) state Apatosaurus had a great feeding range; its neck could bend into a U-shape laterally. The neck's range of movement would have also allowed the head to feed at the level of the feet. Matthew Cobley et al. (2013) dispute this, finding that large muscles and cartilage would have limited movement of the neck. They state the feeding ranges for sauropods like Diplodocus were smaller than previously believed, and the animals may have had to move their whole bodies around to better access areas where they could browse vegetation. As such, they might have spent more time foraging to meet their minimum energy needs. The conclusions of Cobley etal. are disputed by Taylor, who analyzed the amount and positioning of intervertebral cartilage to determine the flexibility of the neck of Apatosaurus and Diplodocus. He found that the neck of Apatosaurus was very flexible. Physiology Given the large body mass and long neck of sauropods like Apatosaurus, physiologists have encountered problems determining how these animals breathed. Beginning with the assumption that, like crocodilians, Apatosaurus did not have a diaphragm, the dead-space volume (the amount of unused air remaining in the mouth, trachea, and air tubes after each breath) has been estimated at about for a specimen. Paladino calculates its tidal volume (the amount of air moved in or out during a single breath) at with an avian respiratory system, if mammalian, and if reptilian. On this basis, its respiratory system would likely have been parabronchi, with multiple pulmonary air sacs as in avian lungs, and a flow-through lung. An avian respiratory system would need a lung volume of about compared with a mammalian requirement of , which would exceed the space available. The overall thoracic volume of Apatosaurus has been estimated at , allowing for a , four-chambered heart and a lung capacity. That would allow about for the necessary tissue. Evidence for the avian system in Apatosaurus and other sauropods is also present in the pneumaticity of the vertebrae. Though this plays a role in reducing the weight of the animal, Wedel (2003) states they are also likely connected to air sacs, as in birds. James Spotila et al. (1991) concludes that the large body size of sauropods would have made them unable to maintain high metabolic rates because they would not have been able to release enough heat. They assumed sauropods had a reptilian respiratory system. Wedel says that an avian system would have allowed it to dump more heat. Some scientists state that the heart would have had trouble sustaining sufficient blood pressure to oxygenate the brain. Others suggest that the near-horizontal posture of the head and neck would have eliminated the problem of supplying blood to the brain because it would not have been elevated. James Farlow (1987) calculates that an Apatosaurus-sized dinosaur about would have possessed of fermentation contents. Assuming Apatosaurus had an avian respiratory system and a reptilian resting-metabolism, Frank Paladino etal. (1997) estimate the animal would have needed to consume only about of water per day. Growth A 1999 microscopic study of Apatosaurus and Brontosaurus bones concluded the animals grew rapidly when young and reached near-adult sizes in about 10years. In 2008, a study on the growth rates of sauropods was published by Thomas Lehman and Holly Woodward. They said that by using growth lines and length-to-mass ratios, Apatosaurus would have grown to 25t (25 long tons; 28 short tons) in 15years, with growth peaking at in a single year. An alternative method, using limb length and body mass, found Apatosaurus grew per year, and reached its full mass before it was about 70years old. These estimates have been called unreliable because the calculation methods are not sound; old growth lines would have been obliterated by bone remodelling. One of the first identified growth factors of Apatosaurus was the number of sacral vertebrae, which increased to five by the time of the creature's maturity. This was first noted in 1903 and again in 1936. Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Eva Griebeler etal. (2013) examined long-bone histological data and concluded the Apatosaurus sp.SMA0014 weighed , reached sexual maturity at 21years, and died aged 28. The same growth model indicated Apatosaurus sp.BYU 601–17328 weighed , reached sexual maturity at 19years, and died aged 31. Juveniles Compared with most sauropods, a relatively large amount of juvenile material is known from Apatosaurus. Multiple specimens in the OMNH are from juveniles of an undetermined species of Apatosaurus; this material includes partial shoulder and pelvic girdles, some vertebrae, and limb bones. OMNH juvenile material is from at least two different age groups and based on overlapping bones likely comes from more than three individuals. The specimens exhibit features that distinguish Apatosaurus from its relatives, and thus likely belong to the genus. Juvenile sauropods tend to have proportionally shorter necks and tails, and a more pronounced forelimb-hindlimb disparity than found in adult sauropods. Tail An article published in 1997 reported research of the mechanics of Apatosaurus tails by Nathan Myhrvold and paleontologist Philip J. Currie. Myhrvold carried out a computer simulation of the tail, which in diplodocids like Apatosaurus was a very long, tapering structure resembling a bullwhip. This computer modeling suggested diplodocids were capable of producing a whiplike cracking sound of over 200 decibels, comparable to the volume of a cannon being fired. A pathology has been identified on the tail of Apatosaurus, caused by a growth defect. Two caudal vertebrae are seamlessly fused along the entire articulating surface of the bone, including the arches of the neural spines. This defect might have been caused by the lack or inhibition of the substance that forms intervertebral disks or joints. It has been proposed that the whips could have been used in combat and defense, but the tails of diplodocids were quite light and narrow compared to Shunosaurus and mamenchisaurids, and thus to injure another animal with the tail would severely injure the tail itself. More recently, Baron (2020) considers the use of the tail as a bullwhip unlikely because of the potentially catastrophic muscle and skeletal damage such speeds could cause on the large and heavy tail. Instead, he proposes that the tails might have been used as a tactile organ to keep in touch with the individuals behind and on the sides in a group while migrating, which could have augmented cohesion and allowed communication among individuals while limiting more energetically demanding activities like stopping to search for dispersed individuals, turning to visually check on individuals behind, or communicating vocally. Paleoecology The Morrison Formation is a sequence of shallow marine and alluvial sediments which, according to radiometric dating, dates from between 156.3mya at its base, and 146.8mya at the top, placing it in the late Oxfordian, Kimmeridgian, and early Tithonian stages of the Late Jurassic period. This formation is interpreted as originating in a locally semiarid environment with distinct wet and dry seasons. The Morrison Basin, where dinosaurs lived, stretched from New Mexico to Alberta and Saskatchewan; it was formed when the precursors to the Front Range of the Rocky Mountains started pushing up to the west. The deposits from their east-facing drainage basins were carried by streams and rivers and deposited in swampy lowlands, lakes, river channels, and floodplains. This formation is similar in age to the Lourinhã Formation in Portugal and the Tendaguru Formation in Tanzania. Apatosaurus was the second most common sauropod in the Morrison Formation ecosystem, after Camarasaurus. Apatosaurus may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of Apatosaurus ajax are known exclusively from the upper Brushy Basin Member, about 152–151 mya. A.louisae fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional Apatosaurus remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to Brontosaurus. The Morrison Formation records a time when the local environment was dominated by gigantic sauropod dinosaurs. Dinosaurs known from the Morrison Formation include the theropods Allosaurus, Ceratosaurus, Ornitholestes, Saurophaganax, and Torvosaurus; the sauropods Brontosaurus, Brachiosaurus, Camarasaurus, and Diplodocus; and the ornithischians Camptosaurus, Dryosaurus, and Stegosaurus. Apatosaurus is commonly found at the same sites as Allosaurus, Camarasaurus, Diplodocus, and Stegosaurus. Allosaurus accounted for 70–75% of theropod specimens and was at the top trophic level of the Morrison food web. Many of the dinosaurs of the Morrison Formation are of the same genera as those seen in Portuguese rocks of the Lourinhã Formationmainly Allosaurus, Ceratosaurus, and Torvosaurusor have a close counterpartBrachiosaurus and Lusotitan, Camptosaurus and Draconyx, and Apatosaurus and Dinheirosaurus. Other vertebrates that are known to have shared this paleo-environment include ray-finned fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphs, and several species of pterosaur. Shells of bivalves and aquatic snails are also common. The flora of the period has been evidenced in fossils of green algae, fungi, mosses, horsetails, cycads, ginkgoes, and several families of conifers. Vegetation varied from river-lining forests of tree ferns with fern understory (gallery forests), to fern savannas with occasional trees such as the Araucaria-like conifer Brachyphyllum. References External links Batuman, Elif. Brontosaurus Rising (April 2015), The New Yorker Krystek, Lee. "Whatever Happened to the Brontosaurus?" UnMuseum (Museum of Unnatural Mystery), 2002. Taylor, Mike. "Why is 'Brontosaurus' now called Apatosaurus?" MikeTaylor.org.uk, June 28, 2004. Dinosaurs of the Morrison Formation Fossil taxa described in 1877 Late Jurassic dinosaurs of North America Paleontology in Colorado Paleontology in Wyoming Taxa named by Othniel Charles Marsh Apatosaurinae	5
Allosaurus () is an extinct genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic period (Kimmeridgian to late Tithonian ages). The name "Allosaurus" means "different lizard", alluding to its unique (at the time of its discovery) concave vertebrae. It is derived from the Greek words () ("different", "strange", or "other") and () ("lizard" or "reptile"). The first fossil remains that could definitively be ascribed to this genus were described in 1877 by famed paleontologist Othniel Charles Marsh. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Allosaurus was a large bipedal predator for its time. Its skull was light, robust, and equipped with dozens of sharp, serrated teeth. It averaged in length for A. fragilis, with the largest specimens estimated as being long. Relative to the large and powerful legs, its three-fingered hands were small and the body was balanced by a long, muscular tail. It is classified as an allosaurid, a type of carnosaurian theropod dinosaur. The genus has a very complicated taxonomy and includes at least three valid species, the best known of which is A. fragilis. The bulk of Allosaurus remains have come from North America's Morrison Formation, with material also known from the Lourinhã Formation in Portugal. It was known for over half of the 20th century as Antrodemus, but a study of the abundant remains from the Cleveland-Lloyd Dinosaur Quarry returned the name "Allosaurus" to prominence and established it as one of the best-known dinosaurs. As the most abundant large predator of the Morrison Formation, Allosaurus was at the top of the food chain and probably preyed on contemporaneous large herbivorous dinosaurs, with the possibility of hunting other predators. Potential prey included ornithopods, stegosaurids, and sauropods. Some paleontologists interpret Allosaurus as having had cooperative social behavior and hunting in packs, while others believe individuals may have been aggressive toward each other and that congregations of this genus are the result of lone individuals feeding on the same carcasses. Discovery and history Early discoveries and research The discovery and early study of Allosaurus is complicated by the multiplicity of names coined during the Bone Wars of the late 19th century. The first described fossil in this history was a bone obtained secondhand by Ferdinand Vandeveer Hayden in 1869. It came from Middle Park, near Granby, Colorado, probably from Morrison Formation rocks. The locals had identified such bones as "petrified horse hoofs". Hayden sent his specimen to Joseph Leidy, who identified it as half of a tail vertebra and tentatively assigned it to the European dinosaur genus Poekilopleuron as Poicilopleuron valens. He later decided it deserved its own genus, Antrodemus. Allosaurus itself is based on YPM 1930, a small collection of fragmentary bones including parts of three vertebrae, a rib fragment, a tooth, a toe bone, and (most useful for later discussions) the shaft of the right humerus (upper arm). Othniel Charles Marsh gave these remains the formal name Allosaurus fragilis in 1877. Allosaurus comes from the Greek words /, meaning "strange" or "different", and /, meaning "lizard" or "reptile". It was named 'different lizard' because its vertebrae were different from those of other dinosaurs known at the time of its discovery. The species epithet fragilis is Latin for "fragile", referring to lightening features in the vertebrae. The bones were collected from the Morrison Formation of Garden Park, north of Cañon City. O. C. Marsh and Edward Drinker Cope, who were in scientific competition with each other, went on to coin several other genera based on similarly sparse material that would later figure in the taxonomy of Allosaurus. These include Marsh's Creosaurus and Labrosaurus, as well as Cope's Epanterias. In their haste, Cope and Marsh did not always follow up on their discoveries (or, more commonly, those made by their subordinates). For example, after the discovery by Benjamin Mudge of the type specimen of Allosaurus in Colorado, Marsh elected to concentrate work in Wyoming. When work resumed at Garden Park in 1883, M. P. Felch found an almost complete Allosaurus and several partial skeletons. In addition, one of Cope's collectors, H. F. Hubbell, found a specimen in the Como Bluff area of Wyoming in 1879, but apparently did not mention its completeness and Cope never unpacked it. Upon unpacking it in 1903 (several years after Cope had died), it was found to be one of the most complete theropod specimens then known and the skeleton, now cataloged as AMNH 5753, was put on public view in 1908. This is the well-known mount poised over a partial Apatosaurus skeleton as if scavenging it, illustrated as such in a painting by Charles R. Knight. Although notable as the first free-standing mount of a theropod dinosaur and often illustrated and photographed, it has never been scientifically described. The multiplicity of early names complicated later research, with the situation compounded by the terse descriptions provided by Marsh and Cope. Even at the time, authors such as Samuel Wendell Williston suggested that too many names had been coined. For example, Williston pointed out in 1901 that Marsh had never been able to adequately distinguish Allosaurus from Creosaurus. The most influential early attempt to sort out the convoluted situation was produced by Charles W. Gilmore in 1920. He came to the conclusion that the tail vertebra named Antrodemus by Leidy was indistinguishable from those of Allosaurus and that Antrodemus should be the preferred name because, as the older name, it had priority. Antrodemus became the accepted name for this familiar genus for over 50 years, until James Henry Madsen published on the Cleveland-Lloyd specimens and concluded that Allosaurus should be used because Antrodemus was based on material with poor, if any, diagnostic features and locality information. For example, the geological formation that the single bone of Antrodemus came from is unknown. "Antrodemus" has been used informally for convenience when distinguishing between the skull Gilmore restored and the composite skull restored by Madsen. Cleveland-Lloyd discoveries Although sporadic work at what became known as the Cleveland-Lloyd Dinosaur Quarry in Emery County, Utah, had taken place as early as 1927 and the fossil site itself described by William L. Stokes in 1945, major operations did not begin there until 1960. Under a cooperative effort involving nearly 40 institutions, thousands of bones were recovered between 1960 and 1965, led by James Henry Madsen. The quarry is notable for the predominance of Allosaurus remains, the condition of the specimens, and the lack of scientific resolution on how it came to be. The majority of bones belong to the large theropod Allosaurus fragilis (it is estimated that the remains of at least 46 A. fragilis have been found there, out of at a minimum 73 dinosaurs) and the fossils found there are disarticulated and well-mixed. Nearly a dozen scientific papers have been written on the taphonomy of the site, suggesting numerous mutually exclusive explanations for how it may have formed. Suggestions have ranged from animals getting stuck in a bog, becoming trapped in deep mud, falling victim to drought-induced mortality around a waterhole, and getting trapped in a spring-fed pond or seep. Regardless of the actual cause, the great quantity of well-preserved Allosaurus remains has allowed this genus to be known in great detail, making it among the best-known of all theropods. Skeletal remains from the quarry pertain to individuals of almost all ages and sizes, from less than to long, and the disarticulation is an advantage for describing bones usually found fused. Due to being one of Utah's two fossil quarries where numerous Allosaurus specimens have been discovered, Allosaurus was designated as the state fossil of Utah in 1988. Recent work: 1980s–present The period since Madsen's monograph has been marked by a great expansion in studies dealing with topics concerning Allosaurus in life (paleobiological and paleoecological topics). Such studies have covered topics including skeletal variation, growth, skull construction, hunting methods, the brain, and the possibility of gregarious living and parental care. Reanalysis of old material (particularly of large 'allosaur' specimens), new discoveries in Portugal, and several very complete new specimens have also contributed to the growing knowledge base. "Big Al" and "Big Al II" In 1991, "Big Al" (MOR 693), a 95% complete, partially articulated specimen of Allosaurus was discovered, measuring about 8 meters (about 26 ft) long. MOR 693 was excavated near Shell, Wyoming, by a joint Museum of the Rockies and University of Wyoming Geological Museum team. This skeleton was discovered by a Swiss team, led by Kirby Siber. Chure and Loewen in 2020 identified the individual as a representative of the species Allosaurus jimmadseni. In 1996, the same team discovered a second Allosaurus, "Big Al II". This specimen, the best preserved skeleton of its kind to date, is also referred to Allosaurus jimmadseni. The completeness, preservation, and scientific importance of this skeleton gave "Big Al" its name. The individual itself was below the average size for Allosaurus fragilis, as it was a subadult estimated at only 87% grown. The specimen was described by Breithaupt in 1996. Nineteen of its bones were broken or showed signs of serious infection, which may have contributed to "Big Al's" death. Pathologic bones included five ribs, five vertebrae, and four bones of the feet. Several of its damaged bones showed signs of osteomyelitis, a severe bone infection. A particular problem for the living animal was infection and trauma to the right foot that probably affected movement and may have also predisposed the other foot to injury because of a change in gait. "Big Al" had an infection on the first phalanx on the third toe that was afflicted by an involucrum. The infection was long-lived, perhaps up to six months. “Big Al II” is also known to have multiple injuries. Species Six species of Allosaurus have been named: A. amplus, A. atrox, A. europaeus, the type species A. fragilis, A. jimmadseni and A. lucasi. Among these, Daniel Chure and Mark Loewen in 2020 only recognized the species A. fragilis, A. europaeus, and the newly-named A. jimmadseni as being valid species. However, A. europaeus does not show any unique characters compared to the North American species, so a reevaluation of its validity is required. A. fragilis is the type species and was named by Marsh in 1877. It is known from the remains of at least 60 individuals, all found in the Kimmeridgian–Tithonian Upper Jurassic-age Morrison Formation of the United States, spread across Colorado, Montana, New Mexico, Oklahoma, South Dakota, Utah, and Wyoming. Details of the humerus (upper arm) of A. fragilis have been used as diagnostic among Morrison theropods, but A. jimmadseni indicates that this is no longer the case at the species level. A. jimmadseni has been scientifically described based on two nearly complete skeletons. The first specimen to wear the identification was unearthed in Dinosaur National Monument in northeastern Utah, with the original "Big Al" individual subsequently recognized as belonging to the same species. This species differs from A. fragilis in several anatomical details, including a jugal (cheekbone) with a straight lower margin. Fossils are confined to the Salt Wash Member of the Morrison Formation, with A. fragilis only found in the higher Brushy Basin Member. A. fragilis, A. jimmadseni, A. amplus, and A. lucasi are all known from remains discovered in the Kimmeridgian–Tithonian Upper Jurassic-age Morrison Formation of the United States, spread across Colorado, Montana, New Mexico, Oklahoma, South Dakota, Utah and Wyoming. A. fragilis is regarded as the most common, known from the remains of at least 60 individuals. For a while in the late 1980s and early 1990s, it was common to recognize A. fragilis as the short-snouted species, with the long-snouted taxon being A. atrox. However, subsequent analysis of specimens from the Cleveland-Lloyd Dinosaur Quarry, Como Bluff, and Dry Mesa Quarry showed that the differences seen in the Morrison Formation material could be attributed to individual variation. A study of skull elements from the Cleveland-Lloyd site found wide variation between individuals, calling into question previous species-level distinctions based on such features as the shape of the lacrimal horns and the proposed differentiation of A. jimmadseni based on the shape of the jugal. A. europaeus was found in the Kimmeridgian-age Porto Novo Member of the Lourinhã Formation, but it may be the same as A. fragilis. Allosaurus material from Portugal was first reported in 1999 on the basis of MHNUL/AND.001, a partial skeleton including a quadrate, vertebrae, ribs, gastralia, chevrons, part of the hips, and legs. This specimen was assigned to A. fragilis, but the subsequent discovery of a partial skull and neck (ML 415) near Lourinhã, in the Kimmeridgian-age Porto Novo Member of the Lourinhã Formation, spurred the naming of the new species as A. europaeus by Octávio Mateus and colleagues. The species appeared earlier in the Jurassic than A. fragilis and differs from other species of Allosaurus in cranial details. However, more material may show it to be A. fragilis, as originally described. The issue of species and potential synonyms is complicated by the type specimen of Allosaurus fragilis (YPM 1930) being extremely fragmentary, consisting of a few incomplete vertebrae, limb fragments, rib fragments, and a single tooth. Because of this, several scientists have interpreted the type specimen as potentially dubious, meaning the genus Allosaurus itself or at least the species A. fragilis would be a nomen dubium ("dubious name", based on a specimen too incomplete to compare to other specimens or to classify). To address this situation, Gregory S. Paul and Kenneth Carpenter (2010) submitted a petition to the ICZN to have the name "A. fragilis" officially transferred to the more complete specimen USNM4734 (as a neotype). Synonyms Creosaurus, Epanterias, and Labrosaurus are regarded as junior synonyms of Allosaurus. Most of the species that are regarded as synonyms of A. fragilis, or that were misassigned to the genus, are obscure and based on very scrappy remains. One exception is Labrosaurus ferox, named in 1884 by Marsh for an oddly formed partial lower jaw, with a prominent gap in the tooth row at the tip of the jaw, and a rear section greatly expanded and turned down. Later researchers suggested that the bone was pathologic, showing an injury to the living animal, and that part of the unusual form of the rear of the bone was due to plaster reconstruction. It is now regarded as an example of A. fragilis. In his 1988 book, Predatory Dinosaurs of the World, the freelance artist & author Gregory S. Paul proposed that A. fragilis had tall pointed horns and a slender build compared to a postulated second species A. atrox, as well as not being a different sex due to rarity. Allosaurus atrox was originally named by Marsh in 1878 as the type species of its own genus, Creosaurus, and is based on YPM 1890, an assortment of bones that includes a couple of pieces of the skull, portions of nine tail vertebrae, two hip vertebrae, an ilium, and ankle and foot bones. Although the idea of two common Morrison allosaur species was followed in some semi-technical and popular works, the 2000 thesis on Allosauridae noted that Charles Gilmore mistakenly reconstructed USNM 4734 as having a shorter skull than the specimens referred by Paul to atrox, refuting supposed differences between USNM 4734 and putative A. atrox specimens like DINO 2560, AMNH 600, and AMNH 666. "Allosaurus agilis", seen in Zittel, 1887, and Osborn, 1912, is a typographical error for A. fragilis. "Allosaurus ferox" is a typographical error by Marsh for A. fragilis in a figure caption for the partial skull YPM 1893 and YPM 1893 has been treated as a specimen of A fragilis. Likewise, "Labrosaurus fragilis" is a typographical error by Marsh (1896) for Labrosaurus ferox. "A. whitei" is a nomen nudum coined by Pickering in 1996 for the complete Allosaurus specimens that Paul referred to A. atrox. "Madsenius" was coined by David Lambert in 1990, being based on remains from Dinosaur National Monument assigned to Allosaurus or Creosaurus (a synonym of Allosaurus), and was to be described by paleontologist Robert Bakker as "Madsenius trux". However, "Madsenius" is now seen as yet another synonym of Allosaurus because Bakker's action was predicated upon the false assumption of USNM 4734 being distinct from long-snouted Allosaurus due to errors in Gilmore's 1920 reconstruction of USNM 4734. "Wyomingraptor" was informally coined by Bakker for allosaurid remains from the Morrison Formation of the Late Jurassic. The remains unearthed are labeled as Allosaurus and are housed in the Tate Geological Museum. However, there has been no official description of the remains and "Wyomingraptor" has been dismissed as a nomen nudum, with the remains referable to Allosaurus. Formerly assigned species and fossils Several species initially classified within or referred to Allosaurus do not belong within the genus. A. medius was named by Marsh in 1888 for various specimens from the Early Cretaceous Arundel Formation of Maryland, although most of the remains were removed by Richard Swann Lull to the new ornithopod species Dryosaurus grandis, except for a tooth. It was transferred to Antrodemus by Oliver Hay in 1902, but Hay later clarified that this was an inexplicable error on his part. Gilmore considered the tooth nondiagnostic but transferred it to Dryptosaurus, as D. medius. The referral was not accepted in the most recent review of basal tetanurans, and Allosaurus medius was simply listed as a dubious species of theropod. It may be closely related to Acrocanthosaurus. Allosaurus valens is a new combination for Antrodemus valens used by Friedrich von Huene in 1932; Antrodemus valens itself may also pertain to Allosaurus fragilis, as Gilmore suggested in 1920. A. lucaris, another Marsh name, was given to a partial skeleton in 1878. He later decided it warranted its own genus, Labrosaurus, but this has not been accepted, and A. lucaris is also regarded as another specimen of A. fragilis. Allosaurus lucaris, is known mostly from vertebrae, sharing characters with Allosaurus. Paul and Carpenter stated that the type specimen of this species, YPM 1931, was from a younger age than Allosaurus, and might represent a different genus. However, they found that the specimen was undiagnostic, and thus A. lucaris was a nomen dubium. Allosaurus sibiricus was described in 1914 by A. N. Riabinin on the basis of a bone, later identified as a partial fourth metatarsal, from the Early Cretaceous of Buryatia, Russia. It was transferred to Chilantaisaurus in 1990, but is now considered a nomen dubium indeterminate beyond Theropoda. Allosaurus meriani was a new combination by George Olshevsky for Megalosaurus meriani Greppin, 1870, based on a tooth from the Late Jurassic of Switzerland. However, a recent overview of Ceratosaurus included it in Ceratosaurus sp. Apatodon mirus, based on a scrap of vertebra Marsh first thought to be a mammalian jaw, has been listed as a synonym of Allosaurus fragilis. However, it was considered indeterminate beyond Dinosauria by Chure, and Mickey Mortimer believes that the synonymy of Apatodon with Allosaurus was due to correspondence to Ralph Molnar by John McIntosh, whereby the latter reportedly found a paper saying that Othniel Charles Marsh admitted that the Apatodon holotype was actually an allosaurid dorsal vertebra. A. amplexus was named by Gregory S. Paul for giant Morrison allosaur remains, and included in his conception Saurophagus maximus (later Saurophaganax). A. amplexus was originally coined by Cope in 1878 as the type species of his new genus Epanterias, and is based on what is now AMNH 5767, parts of three vertebrae, a coracoid, and a metatarsal. Following Paul's work, this species has been accepted as a synonym of A. fragilis. A 2010 study by Paul and Kenneth Carpenter, however, indicates that Epanterias is temporally younger than the A. fragilis type specimen, so it is a separate species at minimum. A. maximus was a new combination by David K. Smith for Chure's Saurophaganax maximus, a taxon created by Chure in 1995 for giant allosaurid remains from the Morrison of Oklahoma. These remains had been known as Saurophagus, but that name was already in use, leading Chure to propose a substitute. Smith, in his 1998 analysis of variation, concluded that S. maximus was not different enough from Allosaurus to be a separate genus, but did warrant its own species, A. maximus. This reassignment was rejected in a review of basal tetanurans. There are also several species left over from the synonymizations of Creosaurus and Labrosaurus with Allosaurus. Creosaurus potens was named by Lull in 1911 for a vertebra from the Early Cretaceous of Maryland. It is now regarded as a dubious theropod. Labrosaurus stechowi, described in 1920 by Janensch based on isolated Ceratosaurus-like teeth from the Tendaguru beds of Tanzania, was listed by Donald F. Glut as a species of Allosaurus, is now considered a dubious ceratosaurian related to Ceratosaurus. L. sulcatus, named by Marsh in 1896 for a Morrison theropod tooth, which like L. stechowi is now regarded as a dubious Ceratosaurus-like ceratosaur. A. tendagurensis was named in 1925 by Werner Janensch for a partial shin (MB.R.3620) found in the Kimmeridgian-age Tendaguru Formation in Mtwara, Tanzania. Although tabulated as a tentatively valid species of Allosaurus in the second edition of the Dinosauria, subsequent studies place it as indeterminate beyond Tetanurae, either a carcharodontosaurian or megalosaurid. Although obscure, it was a large theropod, possibly around 10 meters long (33 ft) and 2.5 metric tons (2.8 short tons) in weight. Kurzanov and colleagues in 2003 designated six teeth from Siberia as Allosaurus sp. (meaning the authors found the specimens to be most like those of Allosaurus, but did not or could not assign a species to them). They were reclassified as an indeterminate theropod. Also, reports of Allosaurus in Shanxi, China go back to at least 1982. These were interpreted as Torvosaurus remains in 2012. An astragalus (ankle bone) thought to belong to a species of Allosaurus was found at Cape Paterson, Victoria in Early Cretaceous beds in southeastern Australia. It was thought to provide evidence that Australia was a refugium for animals that had gone extinct elsewhere. This identification was challenged by Samuel Welles, who thought it more resembled that of an ornithomimid, but the original authors defended their identification. With fifteen years of new specimens and research to look at, Daniel Chure reexamined the bone and found that it was not Allosaurus, but could represent an allosauroid. Similarly, Yoichi Azuma and Phil Currie, in their description of Fukuiraptor, noted that the bone closely resembled that of their new genus. This specimen is sometimes referred to as "Allosaurus robustus", an informal museum name. It likely belonged to something similar to Australovenator, although one study considered it to belong to an abelisaur. Description Allosaurus was a typical large theropod, having a massive skull on a short neck, a long, slightly sloping tail, and reduced forelimbs. Allosaurus fragilis, the best-known species, had an average length of and mass of , with the largest definitive Allosaurus specimen (AMNH 680) estimated at long, with an estimated weight of . In his 1976 monograph on Allosaurus, James H. Madsen mentioned a range of bone sizes which he interpreted to show a maximum length of . As with dinosaurs in general, weight estimates are debatable, and since 1980 have ranged between , , and approximately for modal adult weight (not maximum). John Foster, a specialist on the Morrison Formation, suggests that is reasonable for large adults of A. fragilis, but that is a closer estimate for individuals represented by the average-sized thigh bones he has measured. Using the subadult specimen nicknamed "Big Al", since assigned to the species Allosaurus jimmadseni, researchers using computer modelling arrived at a best estimate of for the individual, but by varying parameters they found a range from approximately to approximately . A. europaeus has been measured up to in length and in body mass. Several gigantic specimens have been attributed to Allosaurus, but may in fact belong to other genera. The closely related genus Saurophaganax (OMNH 1708) reached perhaps in length, and its single species has sometimes been included in the genus Allosaurus as Allosaurus maximus, though recent studies support it as a separate genus. Another potential specimen of Allosaurus, once assigned to the genus Epanterias (AMNH 5767), may have measured in length. A more recent discovery is a partial skeleton from the Peterson Quarry in Morrison rocks of New Mexico; this large allosaurid may be another individual of Saurophaganax. David K. Smith, examining Allosaurus fossils by quarry, found that the Cleveland-Lloyd Dinosaur Quarry (Utah) specimens are generally smaller than those from Como Bluff (Wyoming) or Brigham Young University's Dry Mesa Quarry (Colorado), but the shapes of the bones themselves did not vary between the sites. A later study by Smith incorporating Garden Park (Colorado) and Dinosaur National Monument (Utah) specimens found no justification for multiple species based on skeletal variation; skull variation was most common and was gradational, suggesting individual variation was responsible. Further work on size-related variation again found no consistent differences, although the Dry Mesa material tended to clump together on the basis of the astragalus, an ankle bone. Kenneth Carpenter, using skull elements from the Cleveland-Lloyd site, found wide variation between individuals, calling into question previous species-level distinctions based on such features as the shape of the horns, and the proposed differentiation of A. jimmadseni based on the shape of the jugal. A study published by Motani et al., in 2020 suggests that Allosaurus was also sexually dimorphic in the width of the femur's head against its length. Skull The skull and teeth of Allosaurus were modestly proportioned for a theropod of its size. Paleontologist Gregory S. Paul gives a length of for a skull belonging to an individual he estimates at long. Each premaxilla (the bones that formed the tip of the snout) held five teeth with D-shaped cross-sections, and each maxilla (the main tooth-bearing bones in the upper jaw) had between 14 and 17 teeth; the number of teeth does not exactly correspond to the size of the bone. Each dentary (the tooth-bearing bone of the lower jaw) had between 14 and 17 teeth, with an average count of 16. The teeth became shorter, narrower, and more curved toward the back of the skull. All of the teeth had saw-like edges. They were shed easily, and were replaced continually, making them common fossils. Its skull was light, robust and equipped with dozens of sharp, serrated teeth. The skull had a pair of horns above and in front of the eyes. These horns were composed of extensions of the lacrimal bones, and varied in shape and size. There were also lower paired ridges running along the top edges of the nasal bones that led into the horns. The horns were probably covered in a keratin sheath and may have had a variety of functions, including acting as sunshades for the eyes, being used for display, and being used in combat against other members of the same species (although they were fragile). There was a ridge along the back of the skull roof for muscle attachment, as is also seen in tyrannosaurids. Inside the lacrimal bones were depressions that may have held glands, such as salt glands. Within the maxillae were sinuses that were better developed than those of more basal theropods such as Ceratosaurus and Marshosaurus; they may have been related to the sense of smell, perhaps holding something like Jacobson's organs. The roof of the braincase was thin, perhaps to improve thermoregulation for the brain. The skull and lower jaws had joints that permitted motion within these units. In the lower jaws, the bones of the front and back halves loosely articulated, permitting the jaws to bow outward and increasing the animal's gape. The braincase and frontals may also have had a joint. Postcranial skeleton Allosaurus had nine vertebrae in the neck, 14 in the back, and five in the sacrum supporting the hips. The number of tail vertebrae is unknown and varied with individual size; James Madsen estimated about 50, while Gregory S. Paul considered that to be too many and suggested 45 or less. There were hollow spaces in the neck and anterior back vertebrae. Such spaces, which are also found in modern theropods (that is, the birds), are interpreted as having held air sacs used in respiration. The rib cage was broad, giving it a barrel chest, especially in comparison to less derived theropods like Ceratosaurus. Allosaurus had gastralia (belly ribs), but these are not common findings, and they may have ossified poorly. In one published case, the gastralia show evidence of injury during life. A furcula (wishbone) was also present, but has only been recognized since 1996; in some cases furculae were confused with gastralia. The ilium, the main hip bone, was massive, and the pubic bone had a prominent foot that may have been used for both muscle attachment and as a prop for resting the body on the ground. Madsen noted that in about half of the individuals from the Cleveland-Lloyd Dinosaur Quarry, independent of size, the pubes had not fused to each other at their foot ends. He suggested that this was a sexual characteristic, with females lacking fused bones to make egg-laying easier. This proposal has not attracted further attention, however. The forelimbs of Allosaurus were short in comparison to the hindlimbs (only about 35% the length of the hindlimbs in adults) and had three fingers per hand, tipped with large, strongly curved and pointed claws. The arms were powerful, and the forearm was somewhat shorter than the upper arm (1:1.2 ulna/humerus ratio). The wrist had a version of the semilunate carpal also found in more derived theropods like maniraptorans. Of the three fingers, the innermost (or thumb) was the largest, and diverged from the others. The phalangeal formula is 2-3-4-0-0, meaning that the innermost finger (phalange) has two bones, the next has three, and the third finger has four. The legs were not as long or suited for speed as those of tyrannosaurids, and the claws of the toes were less developed and more hoof-like than those of earlier theropods. Each foot had three weight-bearing toes and an inner dewclaw, which Madsen suggested could have been used for grasping in juveniles. There was also what is interpreted as the splint-like remnant of a fifth (outermost) metatarsal, perhaps used as a lever between the Achilles tendon and foot. Skin Skin impressions from Allosaurus have been described. One impression, from a juvenile specimen, measures 30 cm² and is associated with the anterior dorsal ribs/pectoral region. The impression shows small scales measuring 1–3 mm in diameter. A large skin impression from the "Big Al Two" specimen, associated with the base of the tail, measures 20 cm x 20 cm, and shows large scales measuring up to 2 cm in diameter. However it has been noted that these scales are more similar to those of sauropods, and due to the presence of non-theropod remains associated with the tail of "Big Al Two" there is a possibility that this skin impression is not from Allosaurus. Another Allosaurus fossil feature a skin impression from the mandible, showing scales measuring 1–2 mm in diameter. The same fossil also preserves skin impressions from the ventral side of the neck, showing broad scutes. A small skin impression from an Allosaurus skull has been reported, but never described. Classification Allosaurus was an allosaurid, a member of a family of large theropods within the larger group Carnosauria. The family name Allosauridae was created for this genus in 1878 by Othniel Charles Marsh, but the term was largely unused until the 1970s in favor of Megalosauridae, another family of large theropods that eventually became a wastebasket taxon. This, along with the use of Antrodemus for Allosaurus during the same period, is a point that needs to be remembered when searching for information on Allosaurus in publications that predate James Madsen's 1976 monograph. Major publications using the name "Megalosauridae" instead of "Allosauridae" include Gilmore, 1920, von Huene, 1926, Romer, 1956 and 1966, Steel, 1970, and Walker, 1964. Following the publication of Madsen's influential monograph, Allosauridae became the preferred family assignment, but it too was not strongly defined. Semi-technical works used Allosauridae for a variety of large theropods, usually those that were larger and better-known than megalosaurids. Typical theropods that were thought to be related to Allosaurus included Indosaurus, Piatnitzkysaurus, Piveteausaurus, Yangchuanosaurus, Acrocanthosaurus, Chilantaisaurus, Compsosuchus, Stokesosaurus, and Szechuanosaurus. Given modern knowledge of theropod diversity and the advent of cladistic study of evolutionary relationships, none of these theropods is now recognized as an allosaurid, although several, like Acrocanthosaurus and Yangchuanosaurus, are members of closely related families. Below is a cladogram based on the analysis of Benson et al. in 2010. Allosauridae is one of four families in Allosauroidea; the other three are Neovenatoridae, Carcharodontosauridae and Sinraptoridae. Allosauridae has at times been proposed as ancestral to the Tyrannosauridae (which would make it paraphyletic), one example being Gregory S. Paul's Predatory Dinosaurs of the World, but this has been rejected, with tyrannosaurids identified as members of a separate branch of theropods, the Coelurosauria. Allosauridae is the smallest of the carnosaur families, with only Saurophaganax and a currently unnamed French allosauroid accepted as possible valid genera besides Allosaurus in the most recent review. Another genus, Epanterias, is a potential valid member, but it and Saurophaganax may turn out to be large examples of Allosaurus. Recent reviews have kept the genus Saurophaganax and included Epanterias with Allosaurus. Paleobiology Life history The wealth of Allosaurus fossils, from nearly all ages of individuals, allows scientists to study how the animal grew and how long its lifespan may have been. Remains may reach as far back in the lifespan as eggs—crushed eggs from Colorado have been suggested as those of Allosaurus. Based on histological analysis of limb bones, bone deposition appears to stop at around 22 to 28 years, which is comparable to that of other large theropods like Tyrannosaurus. From the same analysis, its maximum growth appears to have been at age 15, with an estimated growth rate of about 150 kilograms (330 lb) per year. Medullary bone tissue (endosteally derived, ephemeral, mineralization located inside the medulla of the long bones in gravid female birds) has been reported in at least one Allosaurus specimen, a shin bone from the Cleveland-Lloyd Quarry. Today, this bone tissue is only formed in female birds that are laying eggs, as it is used to supply calcium to shells. Its presence in the Allosaurus individual has been used to establish sex and show it had reached reproductive age. However, other studies have called into question some cases of medullary bone in dinosaurs, including this Allosaurus individual. Data from extant birds suggested that the medullary bone in this Allosaurus individual may have been the result of a bone pathology instead. However, with the confirmation of medullary tissue indicating sex in a specimen of Tyrannosaurus, it may be possible to ascertain whether or not the Allosaurus in question was indeed female. The discovery of a juvenile specimen with a nearly complete hindlimb shows that the legs were relatively longer in juveniles, and the lower segments of the leg (shin and foot) were relatively longer than the thigh. These differences suggest that younger Allosaurus were faster and had different hunting strategies than adults, perhaps chasing small prey as juveniles, then becoming ambush hunters of large prey upon adulthood. The thigh bone became thicker and wider during growth, and the cross-section less circular, as muscle attachments shifted, muscles became shorter, and the growth of the leg slowed. These changes imply that juvenile legs has less predictable stresses compared with adults, which would have moved with more regular forward progression. Conversely, the skull bones appear to have generally grown isometrically, increasing in size without changing in proportion. Feeding Many paleontologists accept Allosaurus as an active predator of large animals. There is dramatic evidence for allosaur attacks on Stegosaurus, including an Allosaurus tail vertebra with a partially healed puncture wound that fits a Stegosaurus tail spike, and a Stegosaurus neck plate with a U-shaped wound that correlates well with an Allosaurus snout. Sauropods seem to be likely candidates as both live prey and as objects of scavenging, based on the presence of scrapings on sauropod bones fitting allosaur teeth well and the presence of shed allosaur teeth with sauropod bones. However, as Gregory Paul noted in 1988, Allosaurus was probably not a predator of fully grown sauropods, unless it hunted in packs, as it had a modestly sized skull and relatively small teeth, and was greatly outweighed by contemporaneous sauropods. Another possibility is that it preferred to hunt juveniles instead of fully grown adults. Research in the 1990s and the first decade of the 21st century may have found other solutions to this question. Robert T. Bakker, comparing Allosaurus to Cenozoic saber-toothed carnivorous mammals, found similar adaptations, such as a reduction of jaw muscles and increase in neck muscles, and the ability to open the jaws extremely wide. Although Allosaurus did not have saber teeth, Bakker suggested another mode of attack that would have used such neck and jaw adaptations: the short teeth in effect became small serrations on a saw-like cutting edge running the length of the upper jaw, which would have been driven into prey. This type of jaw would permit slashing attacks against much larger prey, with the goal of weakening the victim. Similar conclusions were drawn by another study using finite element analysis on an Allosaurus skull. According to their biomechanical analysis, the skull was very strong but had a relatively small bite force. By using jaw muscles only, it could produce a bite force of 805 to 8,724 N, but the skull could withstand nearly 55,500 N of vertical force against the tooth row. The authors suggested that Allosaurus used its skull like a machete against prey, attacking open-mouthed, slashing flesh with its teeth, and tearing it away without splintering bones, unlike Tyrannosaurus, which is thought to have been capable of damaging bones. They also suggested that the architecture of the skull could have permitted the use of different strategies against different prey; the skull was light enough to allow attacks on smaller and more agile ornithopods, but strong enough for high-impact ambush attacks against larger prey like stegosaurids and sauropods. Their interpretations were challenged by other researchers, who found no modern analogues to a hatchet attack and considered it more likely that the skull was strong to compensate for its open construction when absorbing the stresses from struggling prey. The original authors noted that Allosaurus itself has no modern equivalent, that the tooth row is well-suited to such an attack, and that articulations in the skull cited by their detractors as problematic actually helped protect the palate and lessen stress. Another possibility for handling large prey is that theropods like Allosaurus were "flesh grazers" which could take bites of flesh out of living sauropods that were sufficient to sustain the predator so it would not have needed to expend the effort to kill the prey outright. This strategy would also potentially have allowed the prey to recover and be fed upon in a similar way later. An additional suggestion notes that ornithopods were the most common available dinosaurian prey, and that allosaurs may have subdued them by using an attack similar to that of modern big cats: grasping the prey with their forelimbs, and then making multiple bites on the throat to crush the trachea. This is compatible with other evidence that the forelimbs were strong and capable of restraining prey. Studies done by Stephen Lautenschager et al. from the University of Bristol also indicate Allosaurus could open its jaws quite wide and sustain considerable muscle force. When compared with Tyrannosaurus and the therizinosaurid Erlikosaurus in the same study, it was found that Allosaurus had a wider gape than either; the animal was capable of opening its jaws to a 92-degree angle at maximum. The findings also indicate that large carnivorous dinosaurs, like modern carnivores, had wider jaw gapes than herbivores. A biomechanical study published in 2013 by Eric Snively and colleagues found that Allosaurus had an unusually low attachment point on the skull for the longissimus capitis superficialis neck muscle compared to other theropods such as Tyrannosaurus. This would have allowed the animal to make rapid and forceful vertical movements with the skull. The authors found that vertical strikes as proposed by Bakker and Rayfield are consistent with the animal's capabilities. They also found that the animal probably processed carcasses by vertical movements in a similar manner to falcons, such as kestrels: the animal could have gripped prey with the skull and feet, then pulled back and up to remove flesh. This differs from the prey-handling envisioned for tyrannosaurids, which probably tore flesh with lateral shakes of the skull, similar to crocodilians. In addition, Allosaurus was able to "move its head and neck around relatively rapidly and with considerable control", at the cost of power. Other aspects of feeding include the eyes, arms, and legs. The shape of the skull of Allosaurus limited potential binocular vision to 20° of width, slightly less than that of modern crocodilians. As with crocodilians, this may have been enough to judge prey distance and time attacks. The arms, compared with those of other theropods, were suited for both grasping prey at a distance or clutching it close, and the articulation of the claws suggests that they could have been used to hook things. Finally, the top speed of Allosaurus has been estimated at 30 to 55 kilometers per hour (19 to 34 miles per hour). A paper on the cranio-dental morphology of Allosaurus and how it worked has deemed the hatchet jaw attack unlikely, reinterpreting the unusually wide gape as an adaptation to allow Allosaurus to deliver a muscle-driven bite to large prey, with the weaker jaw muscles being a trade-off to allow for the widened gape. Social behavior It has been speculated since the 1970s that Allosaurus preyed on sauropods and other large dinosaurs by hunting in groups. Such a depiction is common in semitechnical and popular dinosaur literature. Robert T. Bakker has extended social behavior to parental care, and has interpreted shed allosaur teeth and chewed bones of large prey animals as evidence that adult allosaurs brought food to lairs for their young to eat until they were grown, and prevented other carnivores from scavenging on the food. However, there is actually little evidence of gregarious behavior in theropods, and social interactions with members of the same species would have included antagonistic encounters, as shown by injuries to gastralia and bite wounds to skulls (the pathologic lower jaw named Labrosaurus ferox is one such possible example). Such head-biting may have been a way to establish dominance in a pack or to settle territorial disputes. Although Allosaurus may have hunted in packs, it has been argued that Allosaurus and other theropods had largely aggressive interactions instead of cooperative interactions with other members of their own species. The study in question noted that cooperative hunting of prey much larger than an individual predator, as is commonly inferred for theropod dinosaurs, is rare among vertebrates in general, and modern diapsid carnivores (including lizards, crocodiles, and birds) rarely cooperate to hunt in such a way. Instead, they are typically territorial and will kill and cannibalize intruders of the same species, and will also do the same to smaller individuals that attempt to eat before they do when aggregated at feeding sites. According to this interpretation, the accumulation of remains of multiple Allosaurus individuals at the same site; e.g., in the Cleveland–Lloyd Quarry, are not due to pack hunting, but to the fact that Allosaurus individuals were drawn together to feed on other disabled or dead allosaurs, and were sometimes killed in the process. This could explain the high proportion of juvenile and subadult allosaurs present, as juveniles and subadults are disproportionally killed at modern group feeding sites of animals like crocodiles and Komodo dragons. The same interpretation applies to Bakker's lair sites. There is some evidence for cannibalism in Allosaurus, including Allosaurus shed teeth found among rib fragments, possible tooth marks on a shoulder blade, and cannibalized allosaur skeletons among the bones at Bakker's lair sites. Brain and senses The brain of Allosaurus, as interpreted from spiral CT scanning of an endocast, was more consistent with crocodilian brains than those of the other living archosaurs, birds. The structure of the vestibular apparatus indicates that the skull was held nearly horizontal, as opposed to strongly tipped up or down. The structure of the inner ear was like that of a crocodilian, and so Allosaurus probably could have heard lower frequencies best, and would have had trouble with subtle sounds. The olfactory bulbs were large and seem to have been well suited for detecting odors, although the area for evaluating smells was relatively small. Paleopathology In 2001, Bruce Rothschild and others published a study examining evidence for stress fractures and tendon avulsions in theropod dinosaurs and the implications for their behavior. Since stress fractures are caused by repeated trauma rather than singular events they are more likely to be caused by the behavior of the animal than other kinds of injury. Stress fractures and tendon avulsions occurring in the forelimb have special behavioral significance since while injuries to the feet could be caused by running or migration, resistant prey items are the most probable source of injuries to the hand. Allosaurus was one of only two theropods examined in the study to exhibit a tendon avulsion, and in both cases the avulsion occurred on the forelimb. When the researchers looked for stress fractures, they found that Allosaurus had a significantly greater number of stress fractures than Albertosaurus, Ornithomimus or Archaeornithomimus. Of the 47 hand bones the researchers studied, three were found to contain stress fractures. Of the feet, 281 bones were studied and 17 were found to have stress fractures. The stress fractures in the foot bones "were distributed to the proximal phalanges" and occurred across all three weight-bearing toes in "statistically indistinguishable" numbers. Since the lower end of the third metatarsal would have contacted the ground first while an allosaur was running, it would have borne the most stress. If the allosaurs' stress fractures were caused by damage accumulating while walking or running this bone should have experience more stress fractures than the others. The lack of such a bias in the examined Allosaurus fossils indicates an origin for the stress fractures from a source other than running. The authors conclude that these fractures occurred during interaction with prey, like an allosaur trying to hold struggling prey with its feet. The abundance of stress fractures and avulsion injuries in Allosaurus provide evidence for "very active" predation-based rather than scavenging diets. The left scapula and fibula of an Allosaurus fragilis specimen catalogued as USNM 4734 are both pathological, both probably due to healed fractures. The specimen USNM 8367 preserved several pathological gastralia which preserve evidence of healed fractures near their middle. Some of the fractures were poorly healed and "formed pseudoarthroses". A specimen with a fractured rib was recovered from the Cleveland-Lloyd Quarry. Another specimen had fractured ribs and fused vertebrae near the end of the tail. An apparent subadult male Allosaurus fragilis was reported to have extensive pathologies, with a total of fourteen separate injuries. The specimen MOR 693 had pathologies on five ribs, the sixth neck vertebra, the third, eighth, and thirteenth back vertebrae, the second tail vertebra and its chevron, the gastralia right scapula, manual phalanx I left ilium metatarsals III and V, the first phalanx of the third toe and the third phalanx of the second. The ilium had "a large hole...caused by a blow from above". The near end of the first phalanx of the third toe was afflicted by an involucrum. Other pathologies reported in Allosaurus include: Willow breaks in two ribs Healed fractures in the humerus and radius Distortion of joint surfaces in the foot, possibly due to osteoarthritis or developmental issues Osteopetrosis along the endosteal surface of a tibia. Distortions of the joint surfaces of the tail vertebrae, possibly due to osetoarthritis or developmental issues "[E]xtensive 'neoplastic' ankylosis of caudals", possibly due to physical trauma, as well as the fusion of chevrons to centra Coossification of vertebral centra near the end of the tail Amputation of a chevron and foot bone, both possibly a result of bites "[E]xtensive exostoses" in the first phalanx of the third toe Lesions similar to those caused by osteomyelitis in two scapulae Bone spurs in a premaxilla, ungual, and two metacarpals Exostosis in a pedal phalanx possibly attributable to an infectious disease A metacarpal with a round depressed fracture Paleoecology Allosaurus was the most common large theropod in the vast tract of Western American fossil-bearing rock known as the Morrison Formation, accounting for 70 to 75% of theropod specimens, and as such was at the top trophic level of the Morrison food chain. The Morrison Formation is interpreted as a semiarid environment with distinct wet and dry seasons, and flat floodplains. Vegetation varied from river-lining forests of conifers, tree ferns, and ferns (gallery forests), to fern savannas with occasional trees such as the Araucaria-like conifer Brachyphyllum. The Morrison Formation has been a rich fossil hunting ground. The flora of the period has been revealed by fossils of green algae, fungi, mosses, horsetails, ferns, cycads, ginkgoes, and several families of conifers. Animal fossils discovered include bivalves, snails, ray-finned fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphs, several species of pterosaur, numerous dinosaur species, and early mammals such as docodonts, multituberculates, symmetrodonts, and triconodonts. Dinosaurs known from the Morrison include the theropods Ceratosaurus, Ornitholestes, Tanycolagreus, and Torvosaurus, the sauropods Haplocanthosaurus, Camarasaurus, Cathetosaurus, Brachiosaurus, Suuwassea, Apatosaurus, Brontosaurus, Barosaurus, Diplodocus, Supersaurus, Amphicoelias, and Maraapunisaurus, and the ornithischians Camptosaurus, Dryosaurus, and Stegosaurus. Allosaurus is commonly found at the same sites as Apatosaurus, Camarasaurus, Diplodocus, and Stegosaurus. The Late Jurassic formations of Portugal where Allosaurus is present are interpreted as having been similar to the Morrison, but with a stronger marine influence. Many of the dinosaurs of the Morrison Formation are the same genera as those seen in Portuguese rocks (mainly Allosaurus, Ceratosaurus, Torvosaurus, and Stegosaurus), or have a close counterpart (Brachiosaurus and Lusotitan, Camptosaurus and Draconyx). Allosaurus coexisted with fellow large theropods Ceratosaurus and Torvosaurus in both the United States and Portugal. The three appear to have had different ecological niches, based on anatomy and the location of fossils. Ceratosaurus and Torvosaurus may have preferred to be active around waterways, and had lower, thinner bodies that would have given them an advantage in forest and underbrush terrains, whereas Allosaurus was more compact, with longer legs, faster but less maneuverable, and seems to have preferred dry floodplains. Ceratosaurus, better known than Torvosaurus, differed noticeably from Allosaurus in functional anatomy by having a taller, narrower skull with large, broad teeth. Allosaurus was itself a potential food item to other carnivores, as illustrated by an Allosaurus pubic foot marked by the teeth of another theropod, probably Ceratosaurus or Torvosaurus. The location of the bone in the body (along the bottom margin of the torso and partially shielded by the legs), and the fact that it was among the most massive in the skeleton, indicates that the Allosaurus was being scavenged. A bone assemblage in the Upper Jurassic Mygatt-Moore Quarry preserves an unusually high occurrence of theropod bite marks, most of which can be attributed to Allosaurus and Ceratosaurus, while others could have been made by Saurophaganax or Torvosaurus given the size of the striations. While the position of the bite marks on the herbivorous dinosaurs is consistent with predation or early access to remains, bite marks found on Allosaurus material suggest scavenging, either from the other theropods or from another Allosaurus. The unusually high concentration of theropod bite marks compared to other assemblages could be explained either by a more complete utilization of resources during a dry season by theropods, or by a collecting bias in other localities. References External links Specimens, discussion, and references pertaining to Allosaurus fragilis at The Theropod Database Utah State Fossil, Allosaurus , from Pioneer: Utah's Online Library Restoration of MOR 693 ("Big Al") and muscle and organ restoration at Scott Hartman's Skeletal Drawing website List of the many possible Allosaurus species... Late Jurassic genus first appearances Late Jurassic genus extinctions Late Jurassic dinosaurs of Europe Jurassic Portugal Fossils of Portugal Lourinhã Formation Late Jurassic dinosaurs of North America Dinosaurs of the Morrison Formation Paleontology in Colorado Paleontology in Wyoming Paleontology in Utah Fossil taxa described in 1877 Taxa named by Othniel Charles Marsh Apex predators	5
The AK-47, officially known as the Avtomat Kalashnikova (; also known as the Kalashnikov or just AK), is a gas-operated assault rifle that is chambered for the 7.62×39mm cartridge. Developed in the Soviet Union by Russian small-arms designer Mikhail Kalashnikov, it is the originating firearm of the Kalashnikov (or "AK") family of rifles. After more than seven decades since its creation, the AK-47 model and its variants remain one of the most popular and widely used firearms in the world. Design work on the AK-47 began in 1945. It was presented for official military trials in 1947, and, in 1948, the fixed-stock version was introduced into active service for selected units of the Soviet Army. In early 1949, the AK was officially accepted by the Soviet Armed Forces and used by the majority of the member states of the Warsaw Pact. The model and its variants owe their global popularity to their reliability under harsh conditions, low production cost (compared to contemporary weapons), availability in virtually every geographic region, and ease of use. The AK has been manufactured in many countries and has seen service with armed forces as well as irregular forces and insurgencies throughout the world. , "of the estimated 500 million firearms worldwide, approximately 100 million belong to the Kalashnikov family, three-quarters of which are AK-47s". The model is the basis for the development of many other types of individual, crew-served, and specialized firearms. History Origins During World War II, the Sturmgewehr 44 rifle used by German forces made a deep impression on their Soviet counterparts. The select-fire rifle was chambered for a new intermediate cartridge, the 7.92×33mm Kurz, and combined the firepower of a submachine gun with the range and accuracy of a rifle. On 15 July 1943, an earlier model of the Sturmgewehr was demonstrated before the People's Commissariat of Arms of the USSR. The Soviets were impressed with the weapon and immediately set about developing an intermediate caliber fully automatic rifle of their own, to replace the PPSh-41 submachine guns and outdated Mosin–Nagant bolt-action rifles that armed most of the Soviet Army. The Soviets soon developed the 7.62×39mm M43 cartridge, used in the semi-automatic SKS carbine and the RPD light machine gun. Shortly after World War II, the Soviets developed the AK-47 rifle, which quickly replaced the SKS in Soviet service. Introduced in 1959, the AKM is a lighter stamped steel version and the most ubiquitous variant of the entire AK series of firearms. In the 1960s, the Soviets introduced the RPK light machine gun, an AK-type weapon with a stronger receiver, a longer heavy barrel, and a bipod, that eventually replaced the RPD light machine gun. Concept Mikhail Kalashnikov began his career as a weapon designer in 1941 while recuperating from a shoulder wound that he received during the Battle of Bryansk. Kalashnikov himself stated..."I was in the hospital, and a soldier in the bed beside me asked: 'Why do our soldiers have only one rifle for two or three of our men when the Germans have automatics?' So I designed one. I was a soldier, and I created a machine gun for a soldier. It was called an Avtomat Kalashnikova, the automatic weapon of Kalashnikov—AK—and it carried the year of its first manufacture, 1947." The AK-47 is best described as a hybrid of previous rifle technology innovations. "Kalashnikov decided to design an automatic rifle combining the best features of the American M1 Garand and the German StG 44." Kalashnikov's team had access to these weapons and did not need to "reinvent the wheel". Kalashnikov himself observed: "A lot of Russian Army soldiers ask me how one can become a constructor, and how new weaponry is designed. These are very difficult questions. Each designer seems to have his own paths, his own successes and failures. But one thing is clear: before attempting to create something new, it is vital to have a good appreciation of everything that already exists in this field. I myself have had many experiences confirming this to be so." Some claimed that Kalashnikov copied designs like Bulkin's TKB-415 or Simonov's AVS-31. Early designs Kalashnikov started work on a submachine gun design in 1942 and light machine gun design in 1943. Early in 1944, Kalashnikov was given some 7.62×39mm M43 cartridges and informed that other designers were working on weapons for this new Soviet small-arms cartridge. It was suggested that a new weapon might well lead to greater things. He then undertook work on the new rifle. In 1944, he entered a design competition with this new 7.62×39mm, semi-automatic, gas-operated, long-stroke piston carbine, strongly influenced by the American M1 Garand. The new rifle was in the same class as the SKS-45 carbine, with a fixed magazine and gas tube above the barrel. However, the new Kalashnikov design lost out to a Simonov design. In 1946, a new design competition was initiated to develop a new rifle. Kalashnikov submitted a gas-operated rifle with a short-stroke gas piston above the barrel, a breechblock mechanism similar to his 1944 carbine, and a curved 30-round magazine. Kalashnikov's rifles, the AK-1 (with a milled receiver) and AK-2 (with a stamped receiver) proved to be reliable weapons and were accepted to a second round of competition along with other designs. These prototypes (also known as the AK-46) had a rotary bolt, a two-part receiver with separate trigger unit housing, dual controls (separate safety and fire selector switches), and a non-reciprocating charging handle located on the left side of the weapon. This design had many similarities to the StG 44. In late 1946, as the rifles were being tested, one of Kalashnikov's assistants, Aleksandr Zaitsev, suggested a major redesign to improve reliability. At first, Kalashnikov was reluctant, given that their rifle had already fared better than its competitors. Eventually, however, Zaitsev managed to persuade Kalashnikov. In November 1947, the new prototypes (AK-47s) were completed. The rifle used a long-stroke gas piston above the barrel. The upper and lower receivers were combined into a single receiver. The selector and safety were combined into a single control lever/dust cover on the right side of the rifle. And, the bolt handle was simply attached to the bolt carrier. This simplified the design and production of the rifle. The first army trial series began in early 1948. The new rifle proved to be reliable under a wide range of conditions and possessed convenient handling characteristics. In 1949, it was adopted by the Soviet Army as the "7.62 mm Kalashnikov rifle (AK)". Further development There were many difficulties during the initial phase of production. The first production models had stamped sheet metal receivers with a milled trunnion and butt stock insert and a stamped body. Difficulties were encountered in welding the guide and ejector rails, causing high rejection rates. Instead of halting production, a heavy machined receiver was substituted for the sheet metal receiver. Even though production of these milled rifles started in 1951, they were officially referred to as AK-49, based on the date their development started, but they are widely known in the collectors' and current commercial market as "Type 2 AK-47". This was a more costly process, but the use of machined receivers accelerated production as tooling and labor for the earlier Mosin–Nagant rifle's machined receiver were easily adapted. Partly because of these problems, the Soviets were not able to distribute large numbers of the new rifles to soldiers until 1956. During this time, production of the interim SKS rifle continued. Once the manufacturing difficulties of non-milled receivers had been overcome, a redesigned version designated the AKM (M for "modernized" or "upgraded"; in Russian: []) was introduced in 1959. This new model used a stamped sheet metal receiver and featured a slanted muzzle brake on the end of the barrel to compensate for muzzle rise under recoil. In addition, a hammer retarder was added to prevent the weapon from firing out of battery (without the bolt being fully closed), during rapid or fully automatic fire. This is also sometimes referred to as a "cyclic rate reducer", or simply "rate reducer", as it also has the effect of reducing the number of rounds fired per minute during fully automatic fire. The rifle was also roughly one-third lighter than the previous model. Most licensed and unlicensed productions of the Kalashnikov assault rifle abroad were of the AKM variant, partially due to the much easier production of the stamped receiver. This model is the most commonly encountered, having been produced in much greater quantities. All rifles based on the Kalashnikov design are often colloquially referred to as "AK-47s" in the West and some parts of Asia, although this is only correct when applied to rifles based on the original three receiver types. In most former Eastern Bloc countries, the weapon is known simply as the "Kalashnikov" or "AK". The differences between the milled and stamped receivers includes the use of rivets rather than welds on the stamped receiver, as well as the placement of a small dimple above the magazine well for stabilization of the magazine. Replacement In 1974, the Soviets began replacing their AK-47 and AKM rifles with a newer design, the AK-74, which uses 5.45×39mm ammunition. This new rifle and cartridge had only started to be manufactured in Eastern European nations when the Soviet Union collapsed, drastically slowing the production of the AK-74 and other weapons of the former Soviet bloc. Design The AK-47 was designed to be a simple, reliable fully automatic rifle that could be manufactured quickly and cheaply, using mass production methods that were state of the art in the Soviet Union during the late 1940s. The AK-47 uses a long-stroke gas system generally associated with high reliability in adverse conditions. The large gas piston, generous clearance between moving parts, and tapered cartridge case design allow the gun to endure large amounts of foreign matter and fouling without failing to cycle. Cartridge The AK fires the 7.62×39mm cartridge with a muzzle velocity of . The cartridge weight is , and the projectile weight is . The original Soviet M43 bullets are 123-grain boat-tail bullets with a copper-plated steel jacket, a large steel core, and some lead between the core and the jacket. The AK has excellent penetration when shooting through heavy foliage, walls, or a common vehicle's metal body and into an opponent attempting to use these things as cover. The 7.62×39mm M43 projectile does not generally fragment when striking an opponent and has an unusual tendency to remain intact even after making contact with bone. The 7.62×39mm round produces significant wounding in cases where the bullet tumbles (yaws) in tissue, but produces relatively minor wounds in cases where the bullet exits before beginning to yaw. In the absence of yaw, the M43 round can pencil through tissue with relatively little injury. Most, if not all, of the 7.62×39mm ammunition found today is of the upgraded M67 variety. This variety deleted the steel insert, shifting the center of gravity rearward, and allowing the projectile to destabilize (or yaw) at about , nearly earlier in tissue than the M43 round. This change also reduces penetration in ballistic gelatin to ~ for the newer M67 round versus ~ for the older M43 round. However, the wounding potential of M67 is mostly limited to the small permanent wound channel the bullet itself makes, especially when the bullet yaws. Operating mechanism To fire, the operator inserts a loaded magazine, pulls back and releases the charging handle, and then pulls the trigger. In semi-automatic, the firearm fires only once, requiring the trigger to be released and depressed again for the next shot. In fully automatic, the rifle continues to fire automatically cycling fresh rounds into the chamber until the magazine is exhausted or pressure is released from the trigger. After ignition of the cartridge primer and propellant, rapidly expanding propellant gases are diverted into the gas cylinder above the barrel through a vent near the muzzle. The build-up of gases inside the gas cylinder drives the long-stroke piston and bolt carrier rearward and a cam guide machined into the underside of the bolt carrier, along with an ejector spur on the bolt carrier rail guide, rotates the bolt approximately 35° and unlocks it from the barrel extension via a camming pin on the bolt. The moving assembly has about of free travel, which creates a delay between the initial recoil impulse of the piston and the bolt unlocking sequence, allowing gas pressures to drop to a safe level before the seal between the chamber and the bolt is broken. The AK-47 does not have a gas valve; excess gases are ventilated through a series of radial ports in the gas cylinder. Unlike many other rifle platforms, such as the AR-15 platform, the Kalashnikov platform bolt locking lugs are chamfered allowing for primary extraction upon bolt rotation which aids reliable feeding and extraction, albeit not with that much force due to the short distance the bolt carrier travels before acting on the locking lug. The Kalashnikov platform then uses an extractor claw to eject the spent cartridge case. Barrel The rifle received a barrel with a chrome-lined bore and four right-hand grooves at a 240 mm (1 in 9.45 in) or 31.5 calibers rifling twist rate. The gas block contains a gas channel that is installed at a slanted angle with the bore axis. The muzzle is threaded for the installation of various muzzle devices such as a muzzle brake or a blank-firing adaptor. Gas block The gas block of the AK-47 features a cleaning rod capture or sling loop. Gas relief ports that alleviate gas pressure are placed horizontally in a row on the gas cylinder. Fire selector The fire selector is a large lever located on the right side of the rifle; it acts as a dust cover and prevents the charging handle from being pulled fully to the rear when it is on safe. It is operated by the shooter's right fore-fingers and has three settings: safe (up), full-auto (center), and semi-auto (down). The reason for this is that a soldier under stress will push the selector lever down with considerable force, bypassing the full-auto stage and setting the rifle to semi-auto. To set the AK-47 to full-auto requires the deliberate action of centering the selector lever. To operate the fire selector lever, right-handed shooters have to briefly remove their right hand from the pistol grip, which is ergonomically sub-optimal. Some AK-type rifles also have a more traditional selector lever on the left side of the receiver, just above the pistol grip. This lever is operated by the shooter's right thumb and has three settings: safe (forward), full-auto (center), and semi-auto (backward). Sights The AK-47 uses a notched rear tangent iron sight calibrated in increments from . The front sight is a post adjustable for elevation in the field. Horizontal adjustment requires a special drift tool and is done by the armory before the issue or if the need arises by an armorer after the issue. The sight line elements are approximately over the bore axis. The "point-blank range" battle zero setting "П" standing for постоянная (constant) on the 7.62×39mm AK-47 rear tangent sight element corresponds to a zero. These settings mirror the Mosin–Nagant and SKS rifles, which the AK-47 replaced. For the AK-47 combined with service cartridges, the 300 m battle zero setting limits the apparent "bullet rise" within approximately relative to the line of sight. Soldiers are instructed to fire at any target within this range by simply placing the sights on the center of mass (the belt buckle, according to Russian and former Soviet doctrine) of the enemy target. Any errors in range estimation are tactically irrelevant, as a well-aimed shot will hit the torso of the enemy soldier. Some AK-type rifles have a front sight with a flip-up luminous dot that is calibrated at , for improved night fighting. Furniture The AK-47 was originally equipped with a buttstock, handguard, and an upper heat guard made from solid wood. With the introduction of the Type 3 receiver the buttstock, lower handguard, and upper heat guard were manufactured from birch plywood laminates. Such engineered woods are stronger and resist warping better than the conventional one-piece patterns, do not require lengthy maturing, and are cheaper. The wooden furniture was finished with the Russian amber shellac finishing process. AKS and AKMS models featured a downward-folding metal butt-stock similar to that of the German MP40 submachine-gun, for use in the restricted space in the BMP infantry combat vehicle, as well as by paratroops. All 100 series AKs use plastic furniture with side-folding stocks. Magazines The standard magazine capacity is 30 rounds. There are also 10, 20, and 40-round box magazines, as well as 75-round drum magazines. The AK-47's standard 30-round magazines have a pronounced curve that allows them to smoothly feed ammunition into the chamber. Their heavy steel construction combined with "feed-lips" (the surfaces at the top of the magazine that control the angle at which the cartridge enters the chamber) machined from a single steel billet makes them highly resistant to damage. These magazines are so strong that "Soldiers have been known to use their mags as hammers, and even bottle openers". This contributes to the AK-47 magazine being more reliable but makes it heavier than U.S. and NATO magazines. The early slab-sided steel AK-47 30-round detachable box magazines had sheet-metal bodies and weighed empty. The later steel AKM 30-round magazines had lighter sheet-metal bodies with prominent reinforcing ribs weighing empty. To further reduce weight, a lightweight magazine with an aluminum body with a prominent reinforcing waffle rib pattern weighing empty was developed for the AKM that proved to be too fragile, and the small issued amount of these magazines were quickly withdrawn from service. As a replacement steel-reinforced 30-round plastic 7.62×39mm box magazines were introduced. These rust-colored magazines weigh empty and are often mistakenly identified as being made of Bakelite (a phenolic resin), but were fabricated from two parts of AG-S4 molding compound (a glass-reinforced phenol-formaldehyde binder impregnated composite), assembled using an epoxy resin adhesive. Noted for their durability, these magazines did however compromise the rifle's camouflage and lacked the small horizontal reinforcing ribs running down both sides of the magazine body near the front that were added on all later plastic magazine generations. A second-generation steel-reinforced dark-brown (color shades vary from maroon to plum to near black) 30-round 7.62×39mm magazine was introduced in the early 1980s, fabricated from ABS plastic. The third generation steel-reinforced 30-round 7.62×39mm magazine is similar to the second generation, but is darker colored and has a matte non-reflective surface finish. The current issue is a steel-reinforced matte true black non- reflective surface finished 7.62×39mm 30-round magazine, fabricated from ABS plastic weighing empty. Early steel AK-47 magazines are long; the later ribbed steel AKM and newer plastic 7.62×39mm magazines are about shorter. The transition from steel to mainly plastic magazines yields a significant weight reduction and allows a soldier to carry more ammunition for the same weight. All 7.62×39mm AK magazines are backward compatible with older AK variants. 10.12 kg (22.3 lb) is the maximum amount of ammo that the average soldier can comfortably carry. It also allows for the best comparison of the three most common 7.62×39mm AK magazines. Most Yugoslavian and some East German AK magazines were made with cartridge followers that hold the bolt open when empty; however, most AK magazine followers allow the bolt to close when the magazine is empty. Accessories Accessories supplied with the rifle include a long 6H3 bayonet featuring a long spear point blade. The AK-47 bayonet is installed by slipping the diameter muzzle ring around the muzzle and latching the handle down on the bayonet lug under the front sight base. All current model AKM rifles can mount under-barrel 40 mm grenade launchers such as the GP-25 and its variants, which can fire up to 20 rounds per minute and have an effective range of up to 400 meters. The main grenade is the VOG-25 (VOG-25M) fragmentation grenade which has a 6 m (9 m) (20 ft (30 ft)) lethality radius. The VOG-25P/VOG-25PM ("jumping") variant explodes above the ground. The AK-47 can also mount a (rarely used) cup-type grenade launcher, the Kalashnikov grenade launcher that fires standard RGD-5 Soviet hand grenades. The maximum effective range is approximately 150 meters. This launcher can also be used to launch tear gas and riot control grenades. All current AKs (100 series) and some older models have side rails for mounting a variety of scopes and sighting devices, such as the PSO-1 Optical Sniper Sight. The side rails allow for the removal and remounting of optical accessories without interfering with the zeroing of the optic. However, the 100 series side folding stocks cannot be folded with the optics mounted. Characteristics Service life The AK-47 and its variants have been and are made in dozens of countries, with "quality ranging from finely engineered weapons to pieces of questionable workmanship." As a result, the AK-47 has a service/system life of approximately 6,000, to 10,000, to 15,000 rounds. The AK-47 was designed to be a cheap, simple, easy-to-manufacture rifle, perfectly matching Soviet military doctrine that treats equipment and weapons as disposable items. As units are often deployed without adequate logistical support and dependent on "battlefield cannibalization" for resupply, it is more cost-effective to replace rather than repair weapons. The AK-47 has small parts and springs that need to be replaced every few thousand rounds. However, "Every time it is disassembled beyond the field stripping stage, it will take some time for some parts to regain their fit, and some parts may tend to shake loose and fall out when firing the weapon. Some parts of the AK-47 line are riveted together. Repairing these can be quite a hassle since the end of the rivet has to be ground off and a new one set after the part is replaced." Variants Early variants (7.62×39mm) Issue of 1948/49: Type 1: The very earliest models, stamped sheet metal receivers, are now very rare. Issue of 1951: Type 2: Has a milled receiver. The barrel and chamber are chrome-plated to resist corrosion. Issue of 1954/55: Type 3: Lightened, milled receiver variant. Rifle weight is . AKS (AKS-47): Type 1, 2, or 3 receivers: Featured a downward-folding metal stock similar to that of the MP 40 produced in Nazi Germany, for use in the restricted space in the BMP infantry combat vehicle, as well as by paratroops. AKN (AKSN): Night scope rail. Modernized (7.62×39mm) AKM: A simplified, lighter version of the AK-47; the Type 4 receiver is made from stamped and riveted sheet metal. A slanted muzzle device was added to counterclimb in automatic fire. The rifle weight is due to the lighter receiver. This is the most ubiquitous variant of the AK-47. AKMS: Under-folding stock version of the AKM intended for airborne troops. AKMN (AKMSN): Night scope rail. AKML (AKMSL): Slotted flash suppressor and night scope rail. RPK: Hand-held machine gun version with longer barrel and bipod. The variants—RPKS, RPKN (RPKSN), RPKL (RPKSL)—mirror AKM variants. The "S" variants have a side-folding wooden stock. Foreign Variants (7.62×39mm) Type 56: Chinese assault rifle based on the . Still in production primarily for export markets. For the further developed AK models, see Kalashnikov rifles. Production Manufacturing countries of AK-47 and its variants in alphabetical order. A private company Kalashnikov Concern (formerly Izhmash) from Russia has repeatedly claimed that the majority of foreign manufacturers are producing AK-type rifles without proper licensing. Accuracy potential US military method The AK-47's accuracy is generally sufficient to hit an adult male torso out to about , though even experts firing from prone or bench rest positions at this range were observed to have difficulty placing ten consecutive rounds on target. Later designs did not significantly improve the rifle's accuracy. An AK can fire a 10-shot group of at , and at The newer stamped-steel receiver AKM models, while more rugged and less prone to metal fatigue, are less accurate than the forged/milled receivers of their predecessors: the milled AK-47s are capable of shooting groups at , whereas the stamped AKMs are capable of shooting groups at . The best shooters can hit a man-sized target at within five shots (firing from a prone or bench rest position) or ten shots (standing). The single-shot hit-probability on the NATO E-type Silhouette Target (a human upper body half and head silhouette) of the AK-47 and the later developed AK-74, M16A1, and M16A2 rifles were measured by the US military under ideal proving ground conditions in the 1980s as follows: Under worst field exercise circumstances, the hit probabilities for all the tested rifles were drastically reduced, from 34% at 50m down to 3–4% at 600m with no significant differences between weapons at each range. Russian method The following table represents the Russian circular error probable method for determining accuracy, which involves drawing two circles on the target, one for the maximum vertical dispersion of hits and one for the maximum horizontal dispersion of hits. They then disregard the hits on the outer part of the target and only count half of the hits (50% or R50) on the inner part of the circles. This significantly reduces the overall diameter of the groups. They then use both the vertical and horizontal measurements of the reduced groups to measure accuracy. When the R50 results are doubled, the hit probability increases to 93.7%. R50 means the closest 50 percent of the shot group will all be within a circle of the mentioned diameter. The vertical and horizontal mean (R50) deviations with service ammunition at for AK platforms are. Users : Type 56 variant. : Used by pro-Russian separatists : EKAM: The counter-terrorist unit of the Hellenic Police. : Used by pro-Russian separatists : Type 58 variant. – Locally made as well as being in service with the Army Used by Thahan Phran Former users : MPi-K (AK-47) and MPi-KM (AKM). : Replaced by the AKM in 1959 and the AK-74 in 1974. : Replaced by the AKM and AK-74. : Captured from PAVN and Vietcong Illicit trade Throughout the world, the AK and its variants are commonly used by governments, revolutionaries, terrorists, criminals, and civilians alike. In some countries, such as Somalia, Rwanda, Mozambique, Congo, and Tanzania, the prices for Black Market AKs are between $30 and $125 per weapon and prices have fallen in the last few decades due to mass counterfeiting. In Kenya, "an AK-47 fetches five head of cattle (about 10,000 Kenya shillings or 100 U.S. dollars) when offered for barter, but costs almost half that price when cash is paid". There are places around the world where AK-type weapons can be purchased on the black market "for as little as $6, or traded for a chicken or a sack of grain". The AK-47 has also spawned a cottage industry of sorts and has been copied and manufactured (one gun at a time) in small shops around the world (see Khyber Pass Copy). The estimated numbers of AK-type weapons vary greatly. The Small Arms Survey suggests that "between 70 and 100 million of these weapons have been produced since 1947". The World Bank estimates that out of the 500 million total firearms available worldwide, 100 million are of the Kalashnikov family, and 75 million are AK-47s. Because AK-type weapons have been made in many countries, often illicitly, it is impossible to know how many exist. Conflicts The AK-47 has been used in the following conflicts: 1950s Hungarian Revolution (1956) Vietnam War (1955–1975) Laotian Civil War (1959–1975) 1960s Congo Crisis (1960–1965) Portuguese Colonial War (1961–1974) Rhodesian Bush War (1964–1979) The Troubles (late 1960s–1998) Communist insurgency in Thailand (1965–1983) South African Border War (1966–1990) India-China clashes (1967) Cambodian Civil War (1968–1975) Communist insurgency in Malaysia (1968–1989) 1970s Yom Kippur War (1973) Ethiopian Civil War (1974–1991) Western Sahara War (1975–1991) Cambodian–Vietnamese War (1978–1989) Chadian–Libyan War (1978–1987) Soviet–Afghan War (1979–1989) 1980s Iran–Iraq War (1980–1988) Insurgency in Jammu and Kashmir (1988–present) Sri Lankan Civil War (1983–2009) United States invasion of Grenada (1983) Lord's Resistance Army insurgency (1987–present) 1990s Tuareg rebellion (1990–1995) Gulf War (1990–1991) Somali Civil War (1991–present) Yugoslav Wars (1991–2001) Burundian Civil War (1993–2005) Republic of the Congo Civil War (1997–1999) Kargil War (1999) 2000s War in Afghanistan (2001–2021) Iraq War (2003–2011) South Thailand insurgency (2004–present) Mexican drug war (2006–present) 2010s Libyan Civil War (2011) Syrian civil war (2011–present) Iraqi insurgency (2011–2013) Central African Republic Civil War (2012–present) Russo-Ukrainian War (2014–present) 2020s Second Nagorno-Karabakh War (2020) Tigray War (2020–2022) Russian invasion of Ukraine (2022–present) Cultural influence and impact During the Cold War, the Soviet Union and the People's Republic of China, as well as United States and other NATO nations supplied arms and technical knowledge to numerous countries and rebel forces around the world. During this time the Western countries used relatively expensive automatic rifles, such as the FN FAL, the HK G3, the M14, and the M16. In contrast, the Russians and Chinese used the AK-47; its low production cost and ease of manufacture allow them to make AKs in vast numbers. In the pro-communist states, the AK-47 became a symbol of the Third World revolution. They were utilized in the Cambodian Civil War and the Cambodian–Vietnamese War. During the 1980s, the Soviet Union became the principal arms dealer to countries embargoed by Western nations, including Middle Eastern nations such as Libya and Syria, which welcomed Soviet Union backing against Israel. After the fall of the Soviet Union, AK-47s were sold both openly and on the black market to any group with cash, including drug cartels and dictatorial states, and more recently they have been seen in the hands of Islamic groups such as Al-Qaeda, ISIL, and the Taliban in Afghanistan and Iraq, and FARC, Ejército de Liberación Nacional guerrillas in Colombia. In Russia, the Kalashnikov is a tremendous source of national pride. "The family of the inventor of the world's most famous rifle, Mikhail Kalashnikov, has authorized German engineering company MMI to use the well-known Kalashnikov name on a variety of not-so-deadly goods." In recent years, Kalashnikov Vodka has been marketed with souvenir bottles in the shape of the AK-47 Kalashnikov. There are also Kalashnikov watches, umbrellas, and knives. The Kalashnikov Museum (also called the AK-47 museum) opened on 4 November 2004 in Izhevsk, Udmurt Republic. This city is in the Ural Region of Russia. The museum chronicles the biography of General Kalashnikov and documents the invention of the AK-47. The museum complex of Kalashnikov's small arms, a series of halls, and multimedia exhibitions are devoted to the evolution of the AK-47 rifle and attracts 10,000 monthly visitors. Nadezhda Vechtomova, the museum director, stated in an interview that the purpose of the museum is to honor the ingenuity of the inventor and the hard work of the employees and to "separate the weapon as a weapon of murder from the people who are producing it and to tell its history in our country". On 19 September 2017 a monument of Kalashnikov was unveiled in central Moscow. A protester, later detained by police, attempted to unfurl a banner reading "a creator of weapons is a creator of death". The proliferation of this weapon is reflected by more than just numbers. The AK-47 is included on the flag of Mozambique and its emblem, an acknowledgment that the country gained its independence in large part through the effective use of their AK-47s. It is also found in the coats of arms of East Timor, Zimbabwe and the revolution era Burkina Faso, as well as in the flags of Hezbollah, Syrian Resistance, FARC-EP, the New People's Army, TKP/TIKKO and the International Revolutionary People's Guerrilla Forces. U.S. and Western Europe countries frequently associate the AK-47 with their enemies; both Cold War era and present-day. For example, Western works of fiction (movies, television, novels, video games) often portray criminals, gang members, insurgents, and terrorists using AK-47s as the weapon of choice. Conversely, throughout the developing world, the AK-47 can be positively attributed with revolutionaries against foreign occupation, imperialism, or colonialism. In Ireland the AK-47 is associated with The Troubles due to its extensive use by republican paramilitaries during this period. In 2013, a decommissioned AK-47 was included in the A History of Ireland in 100 Objects collection. The AK-47 made an appearance in U.S. popular culture as a recurring focus in the Nicolas Cage film Lord of War (2005). Numerous monologues in the movie focus on the weapon, and its effects on global conflict and the gun running market. In Iraq and Afghanistan, private military company contractors from the U.K. and other countries used the AK-47 and its variants along with Western firearms such as the AR-15. In 2006, the Colombian musician and peace activist César López devised the escopetarra, an AK converted into a guitar. One sold for US$17,000 in a fundraiser held to benefit the victims of anti-personnel mines, while another was exhibited at the United Nations' Conference on Disarmament. In Mexico, the AK-47 is known as "Cuerno de Chivo" (literally "Goat's Horn") because of its curved magazine design. It is one of the weapons of choice of Mexican drug cartels. It is sometimes mentioned in Mexican folk music lyrics. Gallery See also Comparison of the AK-47 and M16 AK-12 PK machine gun Draco Notes References Bibliography Further reading Ружье. Оружие и амуниция, 1999/3, pp. 18–21 has an article about the AK-47 prototypes. An article rejecting some of the alternative theories as to the authorship of the AK-47. An article comparing the internals of the StG 44 and AK-47. Transcription of the commission report on the testing round from the summer of 1947; no winner was selected at this point, but the commission held Kalashnikov's, Dementiev's and Bulkin's designs as most closely satisfying TTT number 3131. Report/letter on the final round of testing, 27 December 1947, declaring Kalashnikov's design the winner. Articles on the 1948 military trials. External links US Army Operator's Manual for the AK-47 Assault Rifle & Weapons and ammunition introduced in 1947 7.62×39mm assault rifles Infantry weapons of the Cold War Rifles of the Cold War Kalashnikov derivatives Assault rifles of the Soviet Union Kalashnikov Concern products	13
The Atanasoff–Berry computer (ABC) was the first automatic electronic digital computer. Limited by the technology of the day, and execution, the device has remained somewhat obscure. The ABC's priority is debated among historians of computer technology, because it was neither programmable, nor Turing-complete. Conventionally, the ABC would be considered the first electronic ALU (arithmetic logic unit) which is integrated into every modern processor's design. Its unique contribution was to make computing faster by being the first to use vacuum tubes to do the arithmetic calculations. Prior to this, slower electro-mechanical methods were used by Konrad Zuse's Z1 computer, and the simultaneously developed Harvard Mark I. The first electronic, programmable, digital machine, the Colossus computer from 1943 to 1945, used similar tube-based technology as ABC. Overview Conceived in 1937, the machine was built by Iowa State College mathematics and physics professor John Vincent Atanasoff with the help of graduate student Clifford Berry. It was designed only to solve systems of linear equations and was successfully tested in 1942. However, its intermediate result storage mechanism, a paper card writer/reader, was not perfected, and when John Vincent Atanasoff left Iowa State College for World War II assignments, work on the machine was discontinued. The ABC pioneered important elements of modern computing, including binary arithmetic and electronic switching elements, but its special-purpose nature and lack of a changeable, stored program distinguish it from modern computers. The computer was designated an IEEE Milestone in 1990. Atanasoff and Berry's computer work was not widely known until it was rediscovered in the 1960s, amid patent disputes over the first instance of an electronic computer. At that time ENIAC, that had been created by John Mauchly and J. Presper Eckert, was considered to be the first computer in the modern sense, but in 1973 a U.S. District Court invalidated the ENIAC patent and concluded that the ENIAC inventors had derived the subject matter of the electronic digital computer from Atanasoff. When, in the mid-1970s, the secrecy surrounding the British World War II development of the Colossus computers that pre-dated ENIAC, was lifted and Colossus was described at a conference in Los Alamos, New Mexico, in June 1976, John Mauchly and Konrad Zuse were reported to have been astonished. Design and construction According to Atanasoff's account, several key principles of the Atanasoff–Berry computer were conceived in a sudden insight after a long nighttime drive to Rock Island, Illinois, during the winter of 1937–38. The ABC innovations included electronic computation, binary arithmetic, parallel processing, regenerative capacitor memory, and a separation of memory and computing functions. The mechanical and logic design was worked out by Atanasoff over the next year. A grant application to build a proof of concept prototype was submitted in March 1939 to the Agronomy department, which was also interested in speeding up computation for economic and research analysis. $5,000 of further funding () to complete the machine came from the nonprofit Research Corporation of New York City. The ABC was built by Atanasoff and Berry in the basement of the physics building at Iowa State College during 1939–1942. The initial funds were released in September, and the 11-tube prototype was first demonstrated in October 1939. A December demonstration prompted a grant for construction of the full-scale machine. The ABC was built and tested over the next two years. A January 15, 1941, story in the Des Moines Register announced the ABC as "an electrical computing machine" with more than 300 vacuum tubes that would "compute complicated algebraic equations" (but gave no precise technical description of the computer). The system weighed more than . It contained approximately of wire, 280 dual-triode vacuum tubes, 31 thyratrons, and was about the size of a desk. It was not programmable, which distinguishes it from more general machines of the same era, such as Konrad Zuse's 1941 Z3 (or earlier iterations) and the Colossus computers of 1943–1945. Nor did it implement the stored-program architecture, first implemented in the Manchester Baby of 1948, required for fully general-purpose practical computing machines. The machine was, however, the first to implement: Using vacuum tubes, rather than wheels, ratchets, mechanical switches, or telephone relays, allowing for greater speed than previous computers Using capacitors for memory, rather than mechanical components, allowing for greater speed and density The memory of the Atanasoff–Berry computer was a system called regenerative capacitor memory, which consisted of a pair of drums, each containing 1600 capacitors that rotated on a common shaft once per second. The capacitors on each drum were organized into 32 "bands" of 50 (30 active bands and two spares in case a capacitor failed), giving the machine a speed of 30 additions/subtractions per second. Data was represented as 50-bit binary fixed-point numbers. The electronics of the memory and arithmetic units could store and operate on 60 such numbers at a time (3000 bits). The alternating current power-line frequency of 60 Hz was the primary clock rate for the lowest-level operations. The arithmetic logic functions were fully electronic, implemented with vacuum tubes. The family of logic gates ranged from inverters to two- and three-input gates. The input and output levels and operating voltages were compatible between the different gates. Each gate consisted of one inverting vacuum-tube amplifier, preceded by a resistor divider input network that defined the logical function. The control logic functions, which only needed to operate once per drum rotation and therefore did not require electronic speed, were electromechanical, implemented with relays. The ALU operated on only one bit of each number at a time; it kept the carry/borrow bit in a capacitor for use in the next AC cycle. Although the Atanasoff–Berry computer was an important step up from earlier calculating machines, it was not able to run entirely automatically through an entire problem. An operator was needed to operate the control switches to set up its functions, much like the electro-mechanical calculators and unit record equipment of the time. Selection of the operation to be performed, reading, writing, converting to or from binary to decimal, or reducing a set of equations was made by front-panel switches and, in some cases, jumpers. There were two forms of input and output: primary user input and output and an intermediate results output and input. The intermediate results storage allowed operation on problems too large to be handled entirely within the electronic memory. (The largest problem that could be solved without the use of the intermediate output and input was two simultaneous equations, a trivial problem.) Intermediate results were binary, written onto paper sheets by electrostatically modifying the resistance at 1500 locations to represent 30 of the 50-bit numbers (one equation). Each sheet could be written or read in one second. The reliability of the system was limited to about 1 error in 100,000 calculations by these units, primarily attributed to lack of control of the sheets' material characteristics. In retrospect, a solution could have been to add a parity bit to each number as written. This problem was not solved by the time Atanasoff left the university for war-related work. Primary user input was decimal, via standard IBM 80-column punched cards, and output was decimal, via a front-panel display. Function The ABC was designed for a specific purpose the solution of systems of simultaneous linear equations. It could handle systems with up to 29 equations, a difficult problem for the time. Problems of this scale were becoming common in physics, the department in which John Atanasoff worked. The machine could be fed two linear equations with up to 29 variables and a constant term and eliminate one of the variables. This process would be repeated manually for each of the equations, which would result in a system of equations with one fewer variable. Then the whole process would be repeated to eliminate another variable. George W. Snedecor, the head of Iowa State's Statistics Department, was very likely the first user of an electronic digital computer to solve real-world mathematics problems. He submitted many of these problems to Atanasoff. Patent dispute On June 26, 1947, J. Presper Eckert and John Mauchly were the first to file for patent on a digital computing device (ENIAC), much to the surprise of Atanasoff. The ABC had been examined by John Mauchly in June 1941, and Isaac Auerbach, a former student of Mauchly's, alleged that it influenced his later work on ENIAC, although Mauchly denied this. The ENIAC patent did not issue until 1964, and by 1967 Honeywell sued Sperry Rand in an attempt to break the ENIAC patents, arguing that the ABC constituted prior art. The United States District Court for the District of Minnesota released its judgement on October 19, 1973, finding in Honeywell v. Sperry Rand that the ENIAC patent was a derivative of John Atanasoff's invention. Campbell-Kelly and Aspray conclude: The case was legally resolved on October 19, 1973, when U.S. District Judge Earl R. Larson held the ENIAC patent invalid, ruling that the ENIAC derived many basic ideas from the Atanasoff–Berry computer. Judge Larson explicitly stated: Herman Goldstine, one of the original developers of ENIAC wrote: Replica The original ABC was eventually dismantled in 1948, when the university converted the basement to classrooms, and all of its pieces except for one memory drum were discarded. In 1997, a team of researchers led by Dr. Delwyn Bluhm and John Gustafson from Ames Laboratory (located on the Iowa State University campus) finished building a working replica of the Atanasoff–Berry computer at a cost of $350,000 (equivalent to $ in ). The replica ABC was on display in the first floor lobby of the Durham Center for Computation and Communication at Iowa State University and was subsequently exhibited at the Computer History Museum. See also History of computing hardware List of vacuum-tube computers Mikhail Kravchuk References Bibliography External links The Birth of the ABC Reconstruction of the ABC, 1994-1997 John Gustafson, Reconstruction of the Atanasoff-Berry Computer The ENIAC patent trial Honeywell v. Sperry Rand Records, 1846-1973, Charles Babbage Institute, University of Minnesota. The Atanasoff-Berry Computer In Operation (YouTube) 1940s computers One-of-a-kind computers Vacuum tube computers Computer-related introductions in 1942 Early computers Iowa State University Serial computers	9
The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S latitude), and has an average height of about . The Andes extend from north to south through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile and Argentina. Along their length, the Andes are split into several ranges, separated by intermediate depressions. The Andes are the location of several high plateaus—some of which host major cities such as Quito, Bogotá, Cali, Arequipa, Medellín, Bucaramanga, Sucre, Mérida, El Alto and La Paz. The Altiplano Plateau is the world's second-highest after the Tibetan Plateau. These ranges are in turn grouped into three major divisions based on climate: the Tropical Andes, the Dry Andes, and the Wet Andes. The Andes Mountains are the highest mountain range outside Asia. The highest mountain outside Asia, Argentina's Aconcagua, rises to an elevation of about above sea level. The peak of Chimborazo in the Ecuadorian Andes is farther from the Earth's center than any other location on the Earth's surface, due to the equatorial bulge resulting from the Earth's rotation. The world's highest volcanoes are in the Andes, including Ojos del Salado on the Chile-Argentina border, which rises to . The Andes are also part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of the Americas and Antarctica. Etymology The etymology of the word Andes has been debated. The majority consensus is that it derives from the Quechua word 'east' as in Antisuyu (Quechua for 'east region'), one of the four regions of the Inca Empire. The term cordillera comes from the Spanish word cordel 'rope' and is used as a descriptive name for several contiguous sections of the Andes, as well as the entire Andean range, and the combined mountain chain along the western part of the North and South American continents. Geography The Andes can be divided into three sections: The Southern Andes in Argentina and Chile, south of Llullaillaco. The Central Andes in Peru and Bolivia. The Northern Andes in Venezuela, Colombia, and Ecuador. In the northern part of the Andes, the separate Sierra Nevada de Santa Marta range is often treated as part of the Northern Andes. The Leeward Antilles islands Aruba, Bonaire, and Curaçao, which lie in the Caribbean Sea off the coast of Venezuela, were formerly thought to represent the submerged peaks of the extreme northern edge of the Andes range, but ongoing geological studies indicate that such a simplification does not do justice to the complex tectonic boundary between the South American and Caribbean plates. Geology The Andes are a Mesozoic–Tertiary orogenic belt of mountains along the Pacific Ring of Fire, a zone of volcanic activity that encompasses the Pacific rim of the Americas as well as the Asia-Pacific region. The Andes are the result of tectonic plate processes, caused by the subduction of oceanic crust beneath the South American Plate as the Nazca Plate and South American Plate converge. These processes were accelerated by the effects of climate. As the uplift of the Andes created a rain shadow on the western fringes of Chile, ocean currents and prevailing winds carried moisture away from the Chilean coast. This caused some areas of the subduction zone to be sediment starved, causing excess friction and an increased rate of compressed coastal uplift. The main cause of the rise of the Andes is the compression of the western rim of the South American Plate due to the subduction of the Nazca Plate and the Antarctic Plate. To the east, the Andes range is bounded by several sedimentary basins, such as Orinoco, Amazon Basin, Madre de Dios and Gran Chaco, that separate the Andes from the ancient cratons in eastern South America. In the south, the Andes share a long boundary with the former Patagonia Terrane. To the west, the Andes end at the Pacific Ocean, although the Peru-Chile trench can be considered their ultimate western limit. From a geographical approach, the Andes are considered to have their western boundaries marked by the appearance of coastal lowlands and less rugged topography. The Andes Mountains also contain large quantities of iron ore located in many mountains within the range. The Andean orogen has a series of bends or oroclines. The Bolivian Orocline is a seaward concave bending in the coast of South America and the Andes Mountains at about 18° S. At this point, the orientation of the Andes turns from Northwest in Peru to South in Chile and Argentina. The Andean segment north and south of the Orocline have been rotated 15° to 20° counter-clockwise and clockwise respectively. The Bolivian Orocline area overlaps with the area of the maximum width of the Altiplano Plateau and according to Isacks (1988) the Orocline is related to crustal shortening. The specific point at 18° S where the coastline bends is known as the "Arica Elbow". Further south lies the Maipo Orocline a more subtle Orocline between 30° S and 38°S with a seaward-concave break in trend at 33° S. Near the southern tip of the Andes lies the Patagonian Orocline. Orogeny The western rim of the South American Plate has been the place of several pre-Andean orogenies since at least the late Proterozoic and early Paleozoic, when several terranes and microcontinents collided and amalgamated with the ancient cratons of eastern South America, by then the South American part of Gondwana. The formation of the modern Andes began with the events of the Triassic when Pangaea began the break up that resulted in developing several rifts. The development continued through the Jurassic Period. It was during the Cretaceous Period that the Andes began to take their present form, by the uplifting, faulting and folding of sedimentary and metamorphic rocks of the ancient cratons to the east. The rise of the Andes has not been constant, as different regions have had different degrees of tectonic stress, uplift, and erosion. Tectonic forces above the subduction zone along the entire west coast of South America where the Nazca Plate and a part of the Antarctic Plate are sliding beneath the South American Plate continue to produce an ongoing orogenic event resulting in minor to major earthquakes and volcanic eruptions to this day. In the extreme south, a major transform fault separates Tierra del Fuego from the small Scotia Plate. Across the wide Drake Passage lie the mountains of the Antarctic Peninsula south of the Scotia Plate which appear to be a continuation of the Andes chain. The far east regions of the Andes experience a series of changes resulting from the Andean orogeny. Parts of the Sunsás Orogen in Amazonian craton disappeared from the surface of the earth being overridden by the Andes. The Sierras de Córdoba, where the effects of the ancient Pampean orogeny can be observed, owe their modern uplift and relief to the Andean orogeny in the Tertiary. Further south in southern Patagonia the onset of the Andean orogeny caused the Magallanes Basin to evolve from being an extensional back-arc basin in the Mesozoic to being a compressional foreland basin in the Cenozoic. Volcanism The Andes range has many active volcanoes distributed in four volcanic zones separated by areas of inactivity. The Andean volcanism is a result of the subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products and morphology. While some differences can be explained by which volcanic zone a volcano belongs to, there are significant differences inside volcanic zones and even between neighbouring volcanoes. Despite being a typical location for calc-alkalic and subduction volcanism, the Andean Volcanic Belt has a large range of volcano-tectonic settings, such as rift systems and extensional zones, transpressional faults, subduction of mid-ocean ridges and seamount chains apart from a large range of crustal thicknesses and magma ascent paths, and different amount of crustal assimilations. Ore deposits and evaporates The Andes Mountains host large ore and salt deposits and some of their eastern fold and thrust belts act as traps for commercially exploitable amounts of hydrocarbons. In the forelands of the Atacama Desert some of the largest porphyry copper mineralizations occur making Chile and Peru the first- and second-largest exporters of copper in the world. Porphyry copper in the western slopes of the Andes has been generated by hydrothermal fluids (mostly water) during the cooling of plutons or volcanic systems. The porphyry mineralization further benefited from the dry climate that let them largely out of the disturbing actions of meteoric water. The dry climate in the central western Andes has also led to the creation of extensive saltpeter deposits which were extensively mined until the invention of synthetic nitrates. Yet another result of the dry climate are the salars of Atacama and Uyuni, the former being the largest source of lithium today and the latter the world's largest reserve of the element. Early Mesozoic and Neogene plutonism in Bolivia's Cordillera Central created the Bolivian tin belt as well as the famous, now mostly depleted, deposits of Cerro Rico de Potosí. History The Andes Mountains, initially inhabited by hunter-gatherers, experienced the development of agriculture and the rise of politically centralised civilizations, which culminated in the establishment of the century-long Inca Empire. This all changed in the 16th century, when the Spanish conquistadors colonized the mountains in advance of the mining economy. In the tide of anti-imperialist nationalism, the Andes became the scene of a series of independence wars in the 19th century when rebel forces swept through the region to overthrow Spanish colonial rule. Since then, many former Spanish territories have become five independent Andean states. Climate and hydrology The climate in the Andes varies greatly depending on latitude, altitude, and proximity to the sea. Temperature, atmospheric pressure and humidity decrease in higher elevations. The southern section is rainy and cool, the central section is dry. The northern Andes are typically rainy and warm, with an average temperature of in Colombia. The climate is known to change drastically in rather short distances. Rainforests exist just kilometres away from the snow-covered peak of Cotopaxi. The mountains have a large effect on the temperatures of nearby areas. The snow line depends on the location. It is at between in the tropical Ecuadorian, Colombian, Venezuelan, and northern Peruvian Andes, rising to in the drier mountains of southern Peru south to northern Chile south to about 30°S before descending to on Aconcagua at 32°S, at 40°S, at 50°S, and only in Tierra del Fuego at 55°S; from 50°S, several of the larger glaciers descend to sea level. The Andes of Chile and Argentina can be divided into two climatic and glaciological zones: the Dry Andes and the Wet Andes. Since the Dry Andes extend from the latitudes of the Atacama Desert to the area of the Maule River, precipitation is more sporadic and there are strong temperature oscillations. The line of equilibrium may shift drastically over short periods of time, leaving a whole glacier in the ablation area or in the accumulation area. In the high Andes of Central Chile and Mendoza Province, rock glaciers are larger and more common than glaciers; this is due to the high exposure to solar radiation. In these regions glaciers occur typically at higher altitudes than rock glaciers. The lowest active rock glacier occur at 900 m a.s.l. in Aconcagua. Though precipitation increases with height, there are semiarid conditions in the nearly highest mountains of the Andes. This dry steppe climate is considered to be typical of the subtropical position at 32–34° S. The valley bottoms have no woods, just dwarf scrub. The largest glaciers, for example, the Plomo Glacier and the Horcones Glaciers, do not even reach in length and have only insignificant ice thickness. At glacial times, however, c. 20,000 years ago, the glaciers were over ten times longer. On the east side of this section of the Mendozina Andes, they flowed down to and on the west side to about above sea level. The massifs of Cerro Aconcagua (), Cerro Tupungato () and Nevado Juncal () are tens of kilometres away from each other and were connected by a joint ice stream network. The Andes' dendritic glacier arms, i.e. components of valley glaciers, were up to long, over thick and overspanned a vertical distance of . The climatic glacier snowline (ELA) was lowered from to at glacial times. Flora The Andean region cuts across several natural and floristic regions, due to its extension, from Caribbean Venezuela to cold, windy and wet Cape Horn passing through the hyperarid Atacama Desert. Rainforests and tropical dry forests used to encircle much of the northern Andes but are now greatly diminished, especially in the Chocó and inter-Andean valleys of Colombia. Opposite of the humid Andean slopes are the relatively dry Andean slopes in most of western Peru, Chile and Argentina. Along with several Interandean Valles, they are typically dominated by deciduous woodland, shrub and xeric vegetation, reaching the extreme in the slopes near the virtually lifeless Atacama Desert. About 30,000 species of vascular plants live in the Andes, with roughly half being endemic to the region, surpassing the diversity of any other hotspot. The small tree Cinchona pubescens, a source of quinine which is used to treat malaria, is found widely in the Andes as far south as Bolivia. Other important crops that originated from the Andes are tobacco and potatoes. The high-altitude Polylepis forests and woodlands are found in the Andean areas of Colombia, Ecuador, Peru, Bolivia and Chile. These trees, by locals referred to as Queñua, Yagual and other names, can be found at altitudes of above sea level. It remains unclear if the patchy distribution of these forests and woodlands is natural, or the result of clearing which began during the Incan period. Regardless, in modern times the clearance has accelerated, and the trees are now considered to be highly endangered, with some believing that as little as 10% of the original woodland remains. Fauna The Andes are rich in fauna: With almost 1,000 species, of which roughly 2/3 are endemic to the region, the Andes are the most important region in the world for amphibians. The diversity of animals in the Andes is high, with almost 600 species of mammals (13% endemic), more than 1,700 species of birds (about 1/3 endemic), more than 600 species of reptile (about 45% endemic), and almost 400 species of fish (about 1/3 endemic). The vicuña and guanaco can be found living in the Altiplano, while the closely related domesticated llama and alpaca are widely kept by locals as pack animals and for their meat and wool. The crepuscular (active during dawn and dusk) chinchillas, two threatened members of the rodent order, inhabit the Andes' alpine regions. The Andean condor, the largest bird of its kind in the Western Hemisphere, occurs throughout much of the Andes but generally in very low densities. Other animals found in the relatively open habitats of the high Andes include the huemul, cougar, foxes in the genus Pseudalopex, and, for birds, certain species of tinamous (notably members of the genus Nothoprocta), Andean goose, giant coot, flamingos (mainly associated with hypersaline lakes), lesser rhea, Andean flicker, diademed sandpiper-plover, miners, sierra-finches and diuca-finches. Lake Titicaca hosts several endemics, among them the highly endangered Titicaca flightless grebe and Titicaca water frog. A few species of hummingbirds, notably some hillstars, can be seen at altitudes above , but far higher diversities can be found at lower altitudes, especially in the humid Andean forests ("cloud forests") growing on slopes in Colombia, Ecuador, Peru, Bolivia and far northwestern Argentina. These forest-types, which includes the Yungas and parts of the Chocó, are very rich in flora and fauna, although few large mammals exist, exceptions being the threatened mountain tapir, spectacled bear and yellow-tailed woolly monkey. Birds of humid Andean forests include mountain toucans, quetzals and the Andean cock-of-the-rock, while mixed species flocks dominated by tanagers and furnariids commonly are seen – in contrast to several vocal but typically cryptic species of wrens, tapaculos and antpittas. A number of species such as the royal cinclodes and white-browed tit-spinetail are associated with Polylepis, and consequently also threatened. Human activity The Andes Mountains form a north-south axis of cultural influences. A long series of cultural development culminated in the expansion of the Inca civilization and Inca Empire in the central Andes during the 15th century. The Incas formed this civilization through imperialistic militarism as well as careful and meticulous governmental management. The government sponsored the construction of aqueducts and roads in addition to preexisting installations. Some of these constructions are still in existence today. Devastated by European diseases and by civil war, the Incas were defeated in 1532 by an alliance composed of tens of thousands of allies from nations they had subjugated (e.g. Huancas, Chachapoyas, Cañaris) and a small army of 180 Spaniards led by Francisco Pizarro. One of the few Inca sites the Spanish never found in their conquest was Machu Picchu, which lay hidden on a peak on the eastern edge of the Andes where they descend to the Amazon. The main surviving languages of the Andean peoples are those of the Quechua and Aymara language families. Woodbine Parish and Joseph Barclay Pentland surveyed a large part of the Bolivian Andes from 1826 to 1827. Cities In modern times, the largest cities in the Andes are Bogotá, with a metropolitan population of over ten million, and Santiago, Medellín, Cali, and Quito. Lima is a coastal city adjacent to the Andes and is the largest city of all Andean countries. It is the seat of the Andean Community of Nations. La Paz, Bolivia's seat of government, is the highest capital city in the world, at an elevation of approximately . Parts of the La Paz conurbation, including the city of El Alto, extend up to . Other cities in or near the Andes include Bariloche, Catamarca, Jujuy, Mendoza, Salta, San Juan, Tucumán, and Ushuaia in Argentina; Calama and Rancagua in Chile; Cochabamba, Oruro, Potosí, Sucre, Sacaba, Tarija, and Yacuiba in Bolivia; Arequipa, Cajamarca, Cusco, Huancayo, Huánuco, Huaraz, Juliaca, and Puno in Peru; Ambato, Cuenca, Ibarra, Latacunga, Loja, Riobamba and Tulcán in Ecuador; Armenia, Cúcuta, Bucaramanga, Duitama, Ibagué, Ipiales, Manizales, Palmira, Pasto, Pereira, Popayán, Sogamoso, Tunja, and Villavicencio in Colombia; and Barquisimeto, La Grita, Mérida, San Cristóbal, Tovar, Trujillo, and Valera in Venezuela. The cities of Caracas, Valencia, and Maracay are in the Venezuelan Coastal Range, which is a debatable extension of the Andes at the northern extremity of South America. Transportation Cities and large towns are connected with asphalt-paved roads, while smaller towns are often connected by dirt roads, which may require a four-wheel-drive vehicle. The rough terrain has historically put the costs of building highways and railroads that cross the Andes out of reach of most neighboring countries, even with modern civil engineering practices. For example, the main crossover of the Andes between Argentina and Chile is still accomplished through the Paso Internacional Los Libertadores. Only recently the ends of some highways that came rather close to one another from the east and the west have been connected. Much of the transportation of passengers is done via aircraft. However, there is one railroad that connects Chile with Peru via the Andes, and there are others that make the same connection via southern Bolivia. See railroad maps of that region. There are multiple highways in Bolivia that cross the Andes. Some of these were built during a period of war between Bolivia and Paraguay, in order to transport Bolivian troops and their supplies to the war front in the lowlands of southeastern Bolivia and western Paraguay. For decades, Chile claimed ownership of land on the eastern side of the Andes. However, these claims were given up in about 1870 during the War of the Pacific between Chile and the allied Bolivia and Peru, in a diplomatic deal to keep Peru out of the war. The Chilean Army and Chilean Navy defeated the combined forces of Bolivia and Peru, and Chile took over Bolivia's only province on the Pacific Coast, some land from Peru that was returned to Peru decades later. Bolivia has been a completely landlocked country ever since. It mostly uses seaports in eastern Argentina and Uruguay for international trade because its diplomatic relations with Chile have been suspended since 1978. Because of the tortuous terrain in places, villages and towns in the mountains—to which travel via motorized vehicles is of little use—are still located in the high Andes of Chile, Bolivia, Peru, and Ecuador. Locally, the relatives of the camel, the llama, and the alpaca continue to carry out important uses as pack animals, but this use has generally diminished in modern times. Donkeys, mules, and horses are also useful. Agriculture The ancient peoples of the Andes such as the Incas have practiced irrigation techniques for over 6,000 years. Because of the mountain slopes, terracing has been a common practice. Terracing, however, was only extensively employed after Incan imperial expansions to fuel their expanding realm. The potato holds a very important role as an internally consumed staple crop. Maize was also an important crop for these people, and was used for the production of chicha, important to Andean native people. Currently, tobacco, cotton and coffee are the main export crops. Coca, despite eradication programmes in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea, and, both controversially and illegally, for the production of cocaine. Irrigation In unirrigated land, pasture is the most common type of land use. In the rainy season (summer), part of the rangeland is used for cropping (mainly potatoes, barley, broad beans and wheat). Irrigation is helpful in advancing the sowing data of the summer crops which guarantees an early yield in the period of food shortage. Also, by early sowing, maize can be cultivated higher up in the mountains (up to ). In addition, it makes cropping in the dry season (winter) possible and allows the cultivation of frost-resistant vegetable crops like onion and carrot. Mining The Andes rose to fame for their mineral wealth during the Spanish conquest of South America. Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals, the mineralizations of the Andes were first mined on a large scale after the Spanish arrival. Potosí in present-day Bolivia and Cerro de Pasco in Peru were among the principal mines of the Spanish Empire in the New World. Río de la Plata and Argentina derive their names from the silver of Potosí. Currently, mining in the Andes of Chile and Peru places these countries as the first and second major producers of copper in the world. Peru also contains the 4th largest goldmine in the world: the Yanacocha. The Bolivian Andes produce principally tin although historically silver mining had a huge impact on the economy of 17th-century Europe. There is a long history of mining in the Andes, from the Spanish silver mines in Potosí in the 16th century to the vast current porphyry copper deposits of Chuquicamata and Escondida in Chile and Toquepala in Peru. Other metals including iron, gold, and tin in addition to non-metallic resources are important. The Andes have a vast supply of lithium; Argentina, Bolivia, and Chile have the three largest reserves in the world respectively. Peaks This list contains some of the major peaks in the Andes mountain range. The highest peak is Aconcagua of Argentina (see below). Argentina Aconcagua, Cerro Bonete, Galán, Mercedario, Pissis, The border between Argentina and Chile Cerro Bayo, Cerro Fitz Roy, or 3,405 m, Patagonia, also known as Cerro Chaltén Cerro Escorial, Cordón del Azufre, Falso Azufre, Incahuasi, Lastarria, Llullaillaco, Maipo, Marmolejo, Ojos del Salado, Olca, Sierra Nevada de Lagunas Bravas, Socompa, Nevado Tres Cruces, (south summit) (III Region) Tronador, Tupungato, Nacimiento, Bolivia Janq'u Uma, Cabaraya, Chacaltaya, Wayna Potosí, Illampu, Illimani, Laram Q'awa, Macizo de Pacuni, Nevado Anallajsi, Nevado Sajama, Patilla Pata, Tata Sabaya, Border between Bolivia and Chile Acotango, Michincha, Iru Phutunqu, Licancabur, Olca, Parinacota, Paruma, Pomerape, Chile Monte San Valentin, Cerro Paine Grande, Cerro Macá, c. Monte Darwin, c. Volcan Hudson, c. Cerro Castillo Dynevor, c. Mount Tarn, c. Polleras, c. Acamarachi, c. Colombia Nevado del Huila, Nevado del Ruiz, Nevado del Tolima, Pico Pan de Azúcar, Ritacuba Negro, Nevado del Cumbal, Cerro Negro de Mayasquer, Ritacuba Blanco, Nevado del Quindío, Puracé, Santa Isabel, Doña Juana, Galeras, Azufral, Ecuador Antisana, Cayambe, Chiles, Chimborazo, Corazón, Cotopaxi, El Altar, Illiniza, Pichincha, Quilotoa, Reventador, Sangay, Tungurahua, Peru Alpamayo, Artesonraju, Carnicero, Chumpe, Coropuna, El Misti, El Toro, Huandoy, Huascarán, Jirishanca, Pumasillo, Rasac, Rondoy, Sarapo, Salcantay, Seria Norte, Siula Grande, Huaytapallana, Yerupaja, Yerupaja Chico, Venezuela Pico Bolívar, Pico Humboldt, Pico Bonpland, Pico La Concha, Pico Piedras Blancas, Pico El Águila, Pico El Toro Pico El León Pico Mucuñuque See also Andean Geology—a scientific journal Andesite line Apu (god) Mountain passes of the Andes List of mountain ranges Notes References Biggar, J. (2005). The Andes: A Guide For Climbers. 3rd. edition. Andes: Kirkcudbrightshire. de Roy, T. (2005). The Andes: As the Condor Flies. Firefly books: Richmond Hill. Fjeldså, J. & N. Krabbe (1990). The Birds of the High Andes. Zoological Museum, University of Copenhagen: Fjeldså, J. & M. Kessler (1996). Conserving the biological diversity of Polylepis woodlands of the highlands on Peru and Bolivia, a contribution to sustainable natural resource management in the Andes. NORDECO: Copenhagen. Bibliography External links University of Arizona: Andes geology Blueplanetbiomes.org: Climate and animal life of the Andes Discover-peru.org: Regions and Microclimates in the Andes Peaklist.org: Complete list of mountains in South America with an elevation at/above Mountain ranges of South America Regions of South America Physiographic divisions	9
An anchor is a device, normally made of metal, used to secure a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin , which itself comes from the Greek (). Anchors can either be temporary or permanent. Permanent anchors are used in the creation of a mooring, and are rarely moved; a specialist service is normally needed to move or maintain them. Vessels carry one or more temporary anchors, which may be of different designs and weights. A sea anchor is a drag device, not in contact with the seabed, used to minimise drift of a vessel relative to the water. A drogue is a drag device used to slow or help steer a vessel running before a storm in a following or overtaking sea, or when crossing a bar in a breaking sea. Overview Anchors achieve holding power either by "hooking" into the seabed, or weight, or a combination of the two. Permanent moorings use large masses (commonly a block or slab of concrete) resting on the seabed. Semi-permanent mooring anchors (such as mushroom anchors) and large ship's anchors derive a significant portion of their holding power from their weight, while also hooking or embedding in the bottom. Modern anchors for smaller vessels have metal flukes that hook on to rocks on the bottom or bury themselves in soft seabed. The vessel is attached to the anchor by the rode (also called a cable or a warp). It can be made of rope, chain or a combination of rope and chain. The ratio of the length of rode to the water depth is known as the scope (see below). Holding ground Holding ground is the area of sea floor that holds an anchor, and thus the attached ship or boat. Different types of anchor are designed to hold in different types of holding ground. Some bottom materials hold better than others; for instance, hard sand holds well, shell holds poorly. Holding ground may be fouled with obstacles. An anchorage location may be chosen for its holding ground. In poor holding ground, only the weight of an anchor matters; in good holding ground, it is able to dig in, and the holding power can be significantly higher. History Evolution of the anchor The earliest anchors were probably rocks, and many rock anchors have been found dating from at least the Bronze Age. Pre-European Maori waka (canoes) used one or more hollowed stones, tied with flax ropes, as anchors. Many modern moorings still rely on a large rock as the primary element of their design. However, using pure weight to resist the forces of a storm works well only as a permanent mooring; a large enough rock would be nearly impossible to move to a new location. The ancient Greeks used baskets of stones, large sacks filled with sand, and wooden logs filled with lead. According to Apollonius Rhodius and Stephen of Byzantium, anchors were formed of stone, and Athenaeus states that they were also sometimes made of wood. Such anchors held the vessel merely by their weight and by their friction along the bottom. Fluked anchors Iron was afterwards introduced for the construction of anchors, and an improvement was made by forming them with teeth, or "flukes", to fasten themselves into the bottom. This is the iconic anchor shape most familiar to non-sailors. This form has been used since antiquity. The Roman Nemi ships of the 1st century AD used this form. The Viking Ladby ship (probably 10th century) used a fluked anchor of this type, made of iron, which would have had a wooden stock mounted perpendicular to the shank and flukes to make the flukes contact the bottom at a suitable angle to hook or penetrate. Admiralty anchor The Admiralty Pattern anchor, or simply "Admiralty", also known as a "Fisherman", consists of a central shank with a ring or shackle for attaching the rode (the rope, chain, or cable connecting the ship and the anchor). At the other end of the shank there are two arms, carrying the flukes, while the stock is mounted to the shackle end, at ninety degrees to the arms. When the anchor lands on the bottom, it generally falls over with the arms parallel to the seabed. As a strain comes onto the rope, the stock digs into the bottom, canting the anchor until one of the flukes catches and digs into the bottom. The Admiralty Anchor is an entirely independent reinvention of a classical design, as seen in one of the Nemi ship anchors. This basic design remained unchanged for centuries, with the most significant changes being to the overall proportions, and a move from stocks made of wood to iron stocks in the late 1830s and early 1840s. Since one fluke always protrudes up from the set anchor, there is a great tendency of the rode to foul the anchor as the vessel swings due to wind or current shifts. When this happens, the anchor may be pulled out of the bottom, and in some cases may need to be hauled up to be re-set. In the mid-19th century, numerous modifications were attempted to alleviate these problems, as well as improve holding power, including one-armed mooring anchors. The most successful of these patent anchors, the Trotman Anchor, introduced a pivot at the centre of the crown where the arms join the shank, allowing the "idle" upper arm to fold against the shank. When deployed the lower arm may fold against the shank tilting the tip of the fluke upwards, so each fluke has a tripping palm at its base, to hook on the bottom as the folded arm drags along the seabed, which unfolds the downward oriented arm until the tip of the fluke can engage the bottom. Handling and storage of these anchors requires special equipment and procedures. Once the anchor is hauled up to the hawsepipe, the ring end is hoisted up to the end of a timber projecting from the bow known as the cathead. The crown of the anchor is then hauled up with a heavy tackle until one fluke can be hooked over the rail. This is known as "catting and fishing" the anchor. Before dropping the anchor, the fishing process is reversed, and the anchor is dropped from the end of the cathead. Stockless anchor The stockless anchor, patented in England in 1821, represented the first significant departure in anchor design in centuries. Although their holding-power-to-weight ratio is significantly lower than admiralty pattern anchors, their ease of handling and stowage aboard large ships led to almost universal adoption. In contrast to the elaborate stowage procedures for earlier anchors, stockless anchors are simply hauled up until they rest with the shank inside the hawsepipes, and the flukes against the hull (or inside a recess in the hull). While there are numerous variations, stockless anchors consist of a set of heavy flukes connected by a pivot or ball and socket joint to a shank. Cast into the crown of the anchor is a set of tripping palms, projections that drag on the bottom, forcing the main flukes to dig in. Small boat anchors Until the mid-20th century, anchors for smaller vessels were either scaled-down versions of admiralty anchors, or simple grapnels. As new designs with greater holding-power-to-weight ratios were sought, a great variety of anchor designs has emerged. Many of these designs are still under patent, and other types are best known by their original trademarked names. Grapnel anchor / drag A traditional design, the grapnel is merely a shank (no stock) with four or more tines, also known as a drag. It has a benefit in that, no matter how it reaches the bottom, one or more tines are aimed to set. In coral, or rock, it is often able to set quickly by hooking into the structure, but may be more difficult to retrieve. A grapnel is often quite light, and may have additional uses as a tool to recover gear lost overboard. Its weight also makes it relatively easy to move and carry, however its shape is generally not compact and it may be awkward to stow unless a collapsing model is used. Grapnels rarely have enough fluke area to develop much hold in sand, clay, or mud. It is not unknown for the anchor to foul on its own rode, or to foul the tines with refuse from the bottom, preventing it from digging in. On the other hand, it is quite possible for this anchor to find such a good hook that, without a trip line from the crown, it is impossible to retrieve. Herreshoff anchor Designed by yacht designer L. Francis Herreshoff, this is essentially the same pattern as an admiralty anchor, albeit with small diamond-shaped flukes or palms. The novelty of the design lay in the means by which it could be broken down into three pieces for stowage. In use, it still presents all the issues of the admiralty pattern anchor. Northill anchor Originally designed as a lightweight anchor for seaplanes, this design consists of two plough-like blades mounted to a shank, with a folding stock crossing through the crown of the anchor. CQR plough anchor Many manufacturers produce a plough-type anchor, so-named after its resemblance to an agricultural plough. All such anchors are copied from the original CQR (Coastal Quick Release, or Clyde Quick Release, later rebranded as 'secure' by Lewmar), a 1933 design patented in the UK by mathematician Geoffrey Ingram Taylor. Plough anchors stow conveniently in a roller at the bow, and have been popular with cruising sailors and private boaters. Ploughs can be moderately good in all types of seafloor, though not exceptional in any. Contrary to popular belief, the CQR's hinged shank is not to allow the anchor to turn with direction changes rather than breaking out, but actually to prevent the shank's weight from disrupting the fluke's orientation while setting. The hinge can wear out and may trap a sailor's fingers. Some later plough anchors have a rigid shank, such as the Lewmar's "Delta". A plough anchor has a fundamental flaw: like its namesake, the agricultural plough, it digs in but then tends to break out back to the surface. Plough anchors sometimes have difficulty setting at all, and instead skip across the seafloor. By contrast, modern efficient anchors tend to be "scoop" types that dig ever deeper. Delta anchor The Delta anchor was derived from the CQR. It was patented by Philip McCarron, James Stewart, and Gordon Lyall of British marine manufacturer Simpson-Lawrence Ltd in 1992. It was designed as an advance over the anchors used for floating systems such as oil rigs. It retains the weighted tip of the CQR but has a much higher fluke area to weight ratio than its predecessor. The designers also eliminated the sometimes troublesome hinge. It is a plough anchor with a rigid, arched shank. It is described as self-launching because it can be dropped from a bow roller simply by paying out the rode, without manual assistance. This is an oft copied design with the European Brake and Australian Sarca Excel being two of the more notable ones. Although it is a plough type anchor, it sets and holds reasonably well in hard bottoms. Danforth anchor American Richard Danforth invented the Danforth Anchor in the 1940s for use aboard landing craft. It uses a stock at the crown to which two large flat triangular flukes are attached. The stock is hinged so the flukes can orient toward the bottom (and on some designs may be adjusted for an optimal angle depending on the bottom type). Tripping palms at the crown act to tip the flukes into the seabed. The design is a burying variety, and once well set can develop high resistance. Its lightweight and compact flat design make it easy to retrieve and relatively easy to store; some anchor rollers and hawsepipes can accommodate a fluke-style anchor. A Danforth does not usually penetrate or hold in gravel or weeds. In boulders and coral it may hold by acting as a hook. If there is much current, or if the vessel is moving while dropping the anchor, it may "kite" or "skate" over the bottom due to the large fluke area acting as a sail or wing. The FOB HP anchor designed in Brittany in the 1970s is a Danforth variant designed to give increased holding through its use of rounded flukes setting at a 30° angle. The Fortress is an American aluminum alloy Danforth variant that can be disassembled for storage and it features an adjustable 32° and 45° shank/fluke angle to improve holding capability in common sea bottoms such as hard sand and soft mud. This anchor performed well in a 1989 US Naval Sea Systems Command (NAVSEA) test and in an August 2014 holding power test that was conducted in the soft mud bottoms of the Chesapeake Bay. Bruce or claw anchor This claw-shaped anchor was designed by Peter Bruce from Scotland in the 1970s. Bruce gained his early reputation from the production of large-scale commercial anchors for ships and fixed installations such as oil rigs. It was later scaled down for small boats, and copies of this popular design abound. The Bruce and its copies, known generically as "claw type anchors", have been adopted on smaller boats (partly because they stow easily on a bow roller) but they are most effective in larger sizes. Claw anchors are quite popular on charter fleets as they have a high chance to set on the first try in many bottoms. They have the reputation of not breaking out with tide or wind changes, instead slowly turning in the bottom to align with the force. Bruce anchors can have difficulty penetrating weedy bottoms and grass. They offer a fairly low holding-power-to-weight ratio and generally have to be oversized to compete with newer types. Scoop type anchors Three time circumnavigator German Rolf Kaczirek invented the Bügel Anker in the 1980s. Kaczirek wanted an anchor that was self-righting without necessitating a ballasted tip. Instead, he added a roll bar and switched out the plough share for a flat blade design. As none of the innovations of this anchor were patented, copies of it abound. Alain Poiraud of France introduced the scoop type anchor in 1996. Similar in design to the Bügel anchor, Poiraud's design features a concave fluke shaped like the blade of a shovel, with a shank attached parallel to the fluke, and the load applied toward the digging end. It is designed to dig into the bottom like a shovel, and dig deeper as more pressure is applied. The common challenge with all the scoop type anchors is that they set so well, they can be difficult to weigh. Bügelanker, or Wasi: This German-designed bow anchor has a sharp tip for penetrating weed, and features a roll-bar that allows the correct setting attitude to be achieved without the need for extra weight to be inserted into the tip. Spade: This is a French design that has proven successful since 1996. It features a demountable shank (hollow in some instances) and the choice of galvanized steel, stainless steel, or aluminium construction, which means a lighter and more easily stowable anchor. The geometry also makes this anchor self stowing on a single roller. Rocna: This New Zealand spade design, available in galvanised or stainless steel, has been produced since 2004. It has a roll-bar (similar to that of the Bügel), a large spade-like fluke area, and a sharp toe for penetrating weed and grass. The Rocna sets quickly and holds well. Mantus: This is claimed to be a fast setting anchor with high holding power. It is designed as an all round anchor capable of setting even in challenging bottoms such as hard sand/clay bottoms and grass. The shank is made out of a high tensile steel capable of withstanding high loads. It is similar in design to the Rocna but has a larger and wider roll-bar that reduces the risk of fouling and increases the angle of the fluke that results in improved penetration in some bottoms. Ultra: This is an innovative spade design that dispenses with a roll-bar. Made primarily of stainless steel, its main arm is hollow, while the fluke tip has lead within it. It is similar in appearance to the Spade anchor. Vulcan: A recent sibling to the Rocna, this anchor performs similarly but does not have a roll-bar. Instead the Vulcan has patented design features such as the "V-bulb" and the "Roll Palm" that allow it to dig in deeply. The Vulcan was designed primarily for sailors who had difficulties accommodating the roll-bar Rocna on their bow. Peter Smith (originator of the Rocna) designed it specifically for larger powerboats. Both Vulcans and Rocnas are available in galvanised steel, or in stainless steel. The Vulcan is similar in appearance to the Spade anchor. Knox Anchor: This is produced in Scotland and was invented by Professor John Knox. It has a divided concave large area fluke arrangement and a shank in high tensile steel. A roll bar similar to the Rocna gives fast setting and a holding power of about 40 times anchor weight. Other temporary anchors Mud weight: Consists of a blunt heavy weight, usually cast iron or cast lead, that sinks into the mud and resist lateral movement. It is suitable only for soft silt bottoms and in mild conditions. Sizes range between 5 and 20 kg for small craft. Various designs exist and many are home produced from lead or improvised with heavy objects. This is a commonly used method on the Norfolk Broads in England. Bulwagga: This is a unique design featuring three flukes instead of the usual two. It has performed well in tests by independent sources such as American boating magazine Practical Sailor. Permanent anchors These are used where the vessel is permanently or semi-permanently sited, for example in the case of lightvessels or channel marker buoys. The anchor needs to hold the vessel in all weathers, including the most severe storm, but needs to be lifted only occasionally, at most – for example, only if the vessel is to be towed into port for maintenance. An alternative to using an anchor under these circumstances, especially if the anchor need never be lifted at all, may be to use a pile that is driven into the seabed. Permanent anchors come in a wide range of types and have no standard form. A slab of rock with an iron staple in it to attach a chain to would serve the purpose, as would any dense object of appropriate weight (for instance, an engine block). Modern moorings may be anchored by augers, which look and act like oversized screws drilled into the seabed, or by barbed metal beams pounded in (or even driven in with explosives) like pilings, or by a variety of other non-mass means of getting a grip on the bottom. One method of building a mooring is to use three or more conventional anchors laid out with short lengths of chain attached to a swivel, so no matter which direction the vessel moves, one or more anchors are aligned to resist the force. Mushroom The mushroom anchor is suitable where the seabed is composed of silt or fine sand. It was invented by Robert Stevenson, for use by an 82-ton converted fishing boat, Pharos, which was used as a lightvessel between 1807 and 1810 near to Bell Rock whilst the lighthouse was being constructed. It was equipped with a 1.5-ton example. It is shaped like an inverted mushroom, the head becoming buried in the silt. A counterweight is often provided at the other end of the shank to lay it down before it becomes buried. A mushroom anchor normally sinks in the silt to the point where it has displaced its own weight in bottom material, thus greatly increasing its holding power. These anchors are suitable only for a silt or mud bottom, since they rely upon suction and cohesion of the bottom material, which rocky or coarse sand bottoms lack. The holding power of this anchor is at best about twice its weight until it becomes buried, when it can be as much as ten times its weight. They are available in sizes from about 5 kg up to several tons. Deadweight A deadweight is an anchor that relies solely on being a heavy weight. It is usually just a large block of concrete or stone at the end of the chain. Its holding power is defined by its weight underwater (i.e., taking its buoyancy into account) regardless of the type of seabed, although suction can increase this if it becomes buried. Consequently, deadweight anchors are used where mushroom anchors are unsuitable, for example in rock, gravel or coarse sand. An advantage of a deadweight anchor over a mushroom is that if it does drag, it continues to provide its original holding force. The disadvantage of using deadweight anchors in conditions where a mushroom anchor could be used is that it needs to be around ten times the weight of the equivalent mushroom anchor. Auger Auger anchors can be used to anchor permanent moorings, floating docks, fish farms, etc. These anchors, which have one or more slightly pitched self-drilling threads, must be screwed into the seabed with the use of a tool, so require access to the bottom, either at low tide or by use of a diver. Hence they can be difficult to install in deep water without special equipment. Weight for weight, augers have a higher holding than other permanent designs, and so can be cheap and relatively easily installed, although difficult to set in extremely soft mud. High-holding-types There is a need in the oil-and-gas industry to resist large anchoring forces when laying pipelines and for drilling vessels. These anchors are installed and removed using a support tug and pennant/pendant wire. Some examples are the Stevin range supplied by Vrijhof Ankers. Large plate anchors such as the Stevmanta are used for permanent moorings. Anchoring gear The elements of anchoring gear include the anchor, the cable (also called a rode), the method of attaching the two together, the method of attaching the cable to the ship, charts, and a method of learning the depth of the water. Vessels may carry a number of anchors: bower anchors are the main anchors used by a vessel and normally carried at the bow of the vessel. A kedge anchor is a light anchor used for warping an anchor, also known as kedging, or more commonly on yachts for mooring quickly or in benign conditions. A stream anchor, which is usually heavier than a kedge anchor, can be used for kedging or warping in addition to temporary mooring and restraining stern movement in tidal conditions or in waters where vessel movement needs to be restricted, such as rivers and channels. Charts are vital to good anchoring. Knowing the location of potential dangers, as well as being useful in estimating the effects of weather and tide in the anchorage, is essential in choosing a good place to drop the hook. One can get by without referring to charts, but they are an important tool and a part of good anchoring gear, and a skilled mariner would not choose to anchor without them. Anchor rode The anchor rode (or "cable" or "warp") that connects the anchor to the vessel is usually made up of chain, rope, or a combination of those. Large ships use only chain rode. Smaller craft might use a rope/chain combination or an all chain rode. All rodes should have some chain; chain is heavy but it resists abrasion from coral, sharp rocks, or shellfish beds, whereas a rope warp is susceptible to abrasion and can fail in a short time when stretched against an abrasive surface. The weight of the chain also helps keep the direction of pull on the anchor closer to horizontal, which improves holding, and absorbs part of snubbing loads. Where weight is not an issue, a heavier chain provides better holding by forming a catenary curve through the water and resting as much of its length on the bottom as would not be lifted by tension of the mooring load. Any changes to the tension are accommodated by additional chain being lifted or settling on the bottom, and this absorbs shock loads until the chain is straight, at which point the full load is taken by the anchor. Additional dissipation of shock loads can be achieved by fitting a snubber between the chain and a bollard or cleat on deck. This also reduces shock loads on the deck fittings, and the vessel usually lies more comfortably and quietly. Being strong and elastic, nylon rope is the most suitable as an anchor rode. Polyester (terylene) is stronger but less elastic than nylon. Both materials sink, so they avoid fouling other craft in crowded anchorages and do not absorb much water. Neither breaks down quickly in sunlight. Elasticity helps absorb shock loading, but causes faster abrasive wear when the rope stretches over an abrasive surface, like a coral bottom or a poorly designed chock. Polypropylene ("polyprop") is not suited to rodes because it floats and is much weaker than nylon, being barely stronger than natural fibres. Some grades of polypropylene break down in sunlight and become hard, weak, and unpleasant to handle. Natural fibres such as manila or hemp are still used in developing nations but absorb a lot of water, are relatively weak, and rot, although they do give good handling grip and are often relatively cheap. Ropes that have little or no elasticity are not suitable as anchor rodes. Elasticity is partly a function of the fibre material and partly of the rope structure. All anchors should have chain at least equal to the boat's length. Some skippers prefer an all chain warp for greater security on coral or sharp edged rock bottoms. The chain should be shackled to the warp through a steel eye or spliced to the chain using a chain splice. The shackle pin should be securely wired or moused. Either galvanized or stainless steel is suitable for eyes and shackles, galvanised steel being the stronger of the two. Some skippers prefer to add a swivel to the rode. There is a school of thought that says these should not be connected to the anchor itself, but should be somewhere in the chain. However, most skippers connect the swivel directly to the anchor. Scope Scope is the ratio of length of the rode to the depth of the water measured from the highest point (usually the anchor roller or bow chock) to the seabed, making allowance for the highest expected tide. The function of this ratio is to ensure that the pull on the anchor is unlikely to break it out of the bottom if it is embedded, or lift it off a hard bottom, either of which is likely to result in the anchor dragging. A large scope induces a load that is nearly horizontal. In moderate conditions the ratio of rode to water depth should be 4:1 – where there is sufficient swing-room, a greater scope is always better. In rougher conditions it should be up to twice this with the extra length giving more stretch and a smaller angle to the bottom to resist the anchor breaking out. For example, if the water is deep, and the anchor roller is above the water, then the 'depth' is 9 meters (~30 feet). The amount of rode to let our in moderate conditions is thus 36 meters (120 feet). (For this reason it is important to have a reliable and accurate method of measuring the depth of water.) When using a rope rode, there is a simple way to estimate the scope: The ratio of bow height of the rode to length of rode above the water while lying back hard on the anchor is the same or less than the scope ratio. The basis for this is simple geometry (Intercept Theorem): The ratio between two sides of a triangle stays the same regardless of the size of the triangle as long as the angles do not change. Generally, the rode should be between 5 and 10 times the depth to the seabed, giving a scope of 5:1 or 10:1; the larger the number, the shallower the angle is between the cable and the seafloor, and the less upwards force is acting on the anchor. A 10:1 scope gives the greatest holding power, but also allows for much more drifting due to the longer amount of cable paid out. Anchoring with sufficient scope and/or heavy chain rode brings the direction of strain close to parallel with the seabed. This is particularly important for light, modern anchors designed to bury in the bottom, where scopes of 5:1 to 7:1 are common, whereas heavy anchors and moorings can use a scope of 3:1, or less. Some modern anchors, such as the Ultra holds with a scope of 3:1; but, unless the anchorage is crowded, a longer scope always reduces shock stresses. Anchoring techniques The basic anchoring consists of determining the location, dropping the anchor, laying out the scope, setting the hook, and assessing where the vessel ends up. The ship seeks a location that is sufficiently protected; has suitable holding ground, enough depth at low tide and enough room for the boat to swing. The location to drop the anchor should be approached from down wind or down current, whichever is stronger. As the chosen spot is approached, the vessel should be stopped or even beginning to drift back. The anchor should initially be lowered quickly but under control until it is on the bottom (see anchor windlass). The vessel should continue to drift back, and the cable should be veered out under control (slowly) so it is relatively straight. Once the desired scope is laid out, the vessel should be gently forced astern, usually using the auxiliary motor but possibly by backing a sail. A hand on the anchor line may telegraph a series of jerks and jolts, indicating the anchor is dragging, or a smooth tension indicative of digging in. As the anchor begins to dig in and resist backward force, the engine may be throttled up to get a thorough set. If the anchor continues to drag, or sets after having dragged too far, it should be retrieved and moved back to the desired position (or another location chosen.) There are techniques of anchoring to limit the swing of a vessel if the anchorage has limited room: Using an anchor weight, kellet or sentinel Lowering a concentrated, heavy weight down the anchor line – rope or chain – directly in front of the bow to the seabed behaves like a heavy chain rode and lowers the angle of pull on the anchor. If the weight is suspended off the seabed it acts as a spring or shock absorber to dampen the sudden actions that are normally transmitted to the anchor and can cause it to dislodge and drag. In light conditions, a kellet reduces the swing of the vessel considerably. In heavier conditions these effects disappear as the rode becomes straightened and the weight ineffective. Known as an "anchor chum weight" or "angel" in the UK. Forked moor Using two anchors set approximately 45° apart, or wider angles up to 90°, from the bow is a strong mooring for facing into strong winds. To set anchors in this way, first one anchor is set in the normal fashion. Then, taking in on the first cable as the boat is motored into the wind and letting slack while drifting back, a second anchor is set approximately a half-scope away from the first on a line perpendicular to the wind. After this second anchor is set, the scope on the first is taken up until the vessel is lying between the two anchors and the load is taken equally on each cable. This moor also to some degree limits the range of a vessel's swing to a narrower oval. Care should be taken that other vessels do not swing down on the boat due to the limited swing range. Bow and stern (Not to be mistaken with the Bahamian moor, below.) In the bow and stern technique, an anchor is set off each the bow and the stern, which can severely limit a vessel's swing range and also align it to steady wind, current or wave conditions. One method of accomplishing this moor is to set a bow anchor normally, then drop back to the limit of the bow cable (or to double the desired scope, e.g. 8:1 if the eventual scope should be 4:1, 10:1 if the eventual scope should be 5:1, etc.) to lower a stern anchor. By taking up on the bow cable the stern anchor can be set. After both anchors are set, tension is taken up on both cables to limit the swing or to align the vessel. Bahamian moor Similar to the above, a Bahamian moor is used to sharply limit the swing range of a vessel, but allows it to swing to a current. One of the primary characteristics of this technique is the use of a swivel as follows: the first anchor is set normally, and the vessel drops back to the limit of anchor cable. A second anchor is attached to the end of the anchor cable, and is dropped and set. A swivel is attached to the middle of the anchor cable, and the vessel connected to that. The vessel now swings in the middle of two anchors, which is acceptable in strong reversing currents, but a wind perpendicular to the current may break out the anchors, as they are not aligned for this load. Backing an anchor Also known as tandem anchoring, in this technique two anchors are deployed in line with each other, on the same rode. With the foremost anchor reducing the load on the aft-most, this technique can develop great holding power and may be appropriate in "ultimate storm" circumstances. It does not limit swinging range, and might not be suitable in some circumstances. There are complications, and the technique requires careful preparation and a level of skill and experience above that required for a single anchor. Kedging Kedging or warping is a technique for moving or turning a ship by using a relatively light anchor. In yachts, a kedge anchor is an anchor carried in addition to the main, or bower anchors, and usually stowed aft. Every yacht should carry at least two anchors – the main or bower anchor and a second lighter kedge anchor. It is used occasionally when it is necessary to limit the turning circle as the yacht swings when it is anchored, such as in a narrow river or a deep pool in an otherwise shallow area. Kedge anchors are sometimes used to recover vessels that have run aground. For ships, a kedge may be dropped while a ship is underway, or carried out in a suitable direction by a tender or ship's boat to enable the ship to be winched off if aground or swung into a particular heading, or even to be held steady against a tidal or other stream. Historically, it was of particular relevance to sailing warships that used them to outmaneuver opponents when the wind had dropped but might be used by any vessel in confined, shoal water to place it in a more desirable position, provided she had enough manpower . Club hauling Club hauling is an archaic technique. When a vessel is in a narrow channel or on a lee shore so that there is no room to tack the vessel in a conventional manner, an anchor attached to the lee quarter may be dropped from the lee bow. This is deployed when the vessel is head to wind and has lost headway. As the vessel gathers sternway the strain on the cable pivots the vessel around what is now the weather quarter turning the vessel onto the other tack. The anchor is then normally cut away (the ship's momentum prevents recovery without aborting the maneuver). Weighing anchor Since all anchors that embed themselves in the bottom require the strain to be along the seabed, anchors can be broken out of the bottom by shortening the rope until the vessel is directly above the anchor; at this point the anchor chain is "up and down", in naval parlance. If necessary, motoring slowly around the location of the anchor also helps dislodge it. Anchors are sometimes fitted with a trip line attached to the crown, by which they can be unhooked from rocks, coral, chain, or other underwater hazards. The term aweigh describes an anchor when it is hanging on the rope and is not resting on the bottom. This is linked to the term to weigh anchor, meaning to lift the anchor from the sea bed, allowing the ship or boat to move. An anchor is described as aweigh when it has been broken out of the bottom and is being hauled up to be stowed. Aweigh should not be confused with under way, which describes a vessel that is not moored to a dock or anchored, whether or not the vessel is moving through the water. Aweigh is also often confused with away, which is incorrect. Anchor as symbol An anchor frequently appears on the flags and coats of arms of institutions involved with the sea, both naval and commercial, as well as of port cities and seacoast regions and provinces in various countries. There also exists in heraldry the "Anchored Cross", or Mariner's Cross, a stylized cross in the shape of an anchor. The symbol can be used to signify 'fresh start' or 'hope'. The New Testament refers to the Christian's hope as "an anchor of the soul". The Mariner's Cross is also referred to as St. Clement's Cross, in reference to the way this saint was killed (being tied to an anchor and thrown from a boat into the Black Sea in 102). Anchored crosses are occasionally a feature of coats of arms in which context they are referred to by the heraldic terms anchry or ancre. In 1887, the Delta Gamma Fraternity adopted the anchor as its badge to signify hope. The Unicode anchor (Miscellaneous Symbols) is represented by: ⚓. See also "Anchors Aweigh", United States Navy marching song References Bibliography Blackwell, Alex & Daria; Happy Hooking – the Art of Anchoring, 2008, 2011, 2019 White Seahorse; Edwards, Fred; Sailing as a Second Language: An illustrated dictionary, 1988 Highmark Publishing; Hinz, Earl R.; The Complete Book of Anchoring and Mooring, Rev. 2d ed., 1986, 1994, 2001 Cornell Maritime Press; Hiscock, Eric C.; Cruising Under Sail, second edition, 1965 Oxford University Press; Pardey, Lin and Larry; The Capable Cruiser; 1995 Pardey Books/Paradise Cay Publications; Rousmaniere, John; The Annapolis Book of Seamanship, 1983, 1989 Simon and Schuster; Smith, Everrett; Cruising World's Guide to Seamanship: Hold me tight, 1992 New York Times Sports/Leisure Magazines Further reading William N. Brady (1864). The Kedge-anchor; Or, Young Sailors' Assistant. First published as The Naval Apprentice's Kedge Anchor. New York, Taylor and Clement, 1841.--The Kedge-anchor; 3rd ed. New York, 1848.--6th ed. New York, 1852.--9th ed. New York, 1857. External links Anchor Tests: Soft Sand Over Hard Sand—Practical-Sailor The Big Anchor Project Anchor comparison Heraldic charges Nautical terminology Sailboat components Sailing ship components Ship anchors Watercraft components Weights	9
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula . A stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers. Around 70% of ammonia produced industrially is used to make fertilisers in various forms and composition, such as urea and diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceutical products and is used in many commercial cleaning products. It is mainly collected by downward displacement of both air and water. Although common in nature—both terrestrially and in the outer planets of the Solar System—and in wide use, ammonia is both caustic and hazardous in its concentrated form. In many countries it is classified as an extremely hazardous substance, and is subject to strict reporting requirements by facilities that produce, store, or use it in significant quantities. The global industrial production of ammonia in 2021 was 235 million tonnes. Industrial ammonia is sold either as ammonia liquor (usually 28% ammonia in water) or as pressurised or refrigerated anhydrous liquid ammonia transported in tank cars or cylinders. For fundamental reasons, the production of ammonia from the elements hydrogen and nitrogen is difficult, requiring high pressures and high temperatures. The Haber process that enabled industrial production was invented at the beginning of the 20th century, revolutionizing agriculture. boils at at a pressure of one atmosphere, so the liquid must be stored under pressure or at low temperature. Household ammonia or ammonium hydroxide is a solution of in water. The concentration of such solutions is measured in units of the Baumé scale (density), with 26 degrees Baumé (about 30% of ammonia by weight at ) being the typical high-concentration commercial product. Etymology Pliny, in Book XXXI of his Natural History, refers to a salt named hammoniacum, so called because of its proximity to the nearby Temple of Jupiter Amun (Greek Ἄμμων Ammon) in the Roman province of Cyrenaica. However, the description Pliny gives of the salt does not conform to the properties of ammonium chloride. According to Herbert Hoover's commentary in his English translation of Georgius Agricola's De re metallica, it is likely to have been common sea salt. In any case, that salt ultimately gave ammonia and ammonium compounds their name. Natural occurrence Ammonia is a chemical found in trace quantities on Earth, being produced from nitrogenous animal and vegetable matter. Ammonia and ammonium salts are also found in small quantities in rainwater, whereas ammonium chloride (sal ammoniac), and ammonium sulfate are found in volcanic districts. Crystals of ammonium bicarbonate have been found in Patagonia guano. Ammonia is also found throughout the Solar System on Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, among other places: on smaller, icy bodies such as Pluto, ammonia can act as a geologically important antifreeze, as a mixture of water and ammonia can have a melting point as low as if the ammonia concentration is high enough and thus allow such bodies to retain internal oceans and active geology at a far lower temperature than would be possible with water alone. Substances containing ammonia, or those that are similar to it, are called ammoniacal. Properties Ammonia is a colourless gas with a characteristically pungent smell. It is lighter than air, its density being 0.589 times that of air. It is easily liquefied due to the strong hydrogen bonding between molecules. Gaseous ammonia turns to a colourless liquid, which boils at , and freezes to colourless crystals at . Little data is available at very high temperatures and pressures, such as supercritical conditions. Solid The crystal symmetry is cubic, Pearson symbol cP16, space group P213 No.198, lattice constant 0.5125 nm. Liquid Liquid ammonia possesses strong ionising powers reflecting its high ε of 22. Liquid ammonia has a very high standard enthalpy change of vapourization (23.35 kJ/mol; for comparison, water's is 40.65 kJ/mol, methane 8.19 kJ/mol and phosphine 14.6 kJ/mol) and can therefore be used in laboratories in uninsulated vessels without additional refrigeration. See liquid ammonia as a solvent. Solvent properties Ammonia readily dissolves in water. In an aqueous solution, it can be expelled by boiling. The aqueous solution of ammonia is basic. The maximum concentration of ammonia in water (a saturated solution) has a density of 0.880 g/cm3 and is often known as '.880 ammonia'. Table of thermal and physical properties of saturated liquid ammonia: Table of thermal and physical properties of ammonia () at atmospheric pressure: Decomposition At high temperature and in the presence of a suitable catalyst or in a pressurised vessel with constant volume and high temperature (e.g. ), ammonia is decomposed into its constituent elements. Decomposition of ammonia is a slightly endothermic process requiring 23 kJ/mol (5.5 kcal/mol) of ammonia, and yields hydrogen and nitrogen gas. Ammonia can also be used as a source of hydrogen for acid fuel cells if the unreacted ammonia can be removed. Ruthenium and platinum catalysts were found to be the most active, whereas supported Ni catalysts were less active. Structure The ammonia molecule has a trigonal pyramidal shape as predicted by the valence shell electron pair repulsion theory (VSEPR theory) with an experimentally determined bond angle of 106.7°. The central nitrogen atom has five outer electrons with an additional electron from each hydrogen atom. This gives a total of eight electrons, or four electron pairs that are arranged tetrahedrally. Three of these electron pairs are used as bond pairs, which leaves one lone pair of electrons. The lone pair repels more strongly than bond pairs; therefore, the bond angle is not 109.5°, as expected for a regular tetrahedral arrangement, but 106.8°. This shape gives the molecule a dipole moment and makes it polar. The molecule's polarity, and especially its ability to form hydrogen bonds, makes ammonia highly miscible with water. The lone pair makes ammonia a base, a proton acceptor. Ammonia is moderately basic; a 1.0 M aqueous solution has a pH of 11.6, and if a strong acid is added to such a solution until the solution is neutral (), 99.4% of the ammonia molecules are protonated. Temperature and salinity also affect the proportion of ammonium . The latter has the shape of a regular tetrahedron and is isoelectronic with methane. The ammonia molecule readily undergoes nitrogen inversion at room temperature; a useful analogy is an umbrella turning itself inside out in a strong wind. The energy barrier to this inversion is 24.7 kJ/mol, and the resonance frequency is 23.79 GHz, corresponding to microwave radiation of a wavelength of 1.260 cm. The absorption at this frequency was the first microwave spectrum to be observed and was used in the first maser. Amphotericity One of the most characteristic properties of ammonia is its basicity. Ammonia is considered to be a weak base. It combines with acids to form ammonium salts; thus, with hydrochloric acid it forms ammonium chloride (sal ammoniac); with nitric acid, ammonium nitrate, etc. Perfectly dry ammonia gas will not combine with perfectly dry hydrogen chloride gas; moisture is necessary to bring about the reaction. As a demonstration experiment under air with ambient moisture, opened bottles of concentrated ammonia and hydrochloric acid solutions produce a cloud of ammonium chloride, which seems to appear 'out of nothing' as the salt aerosol forms where the two diffusing clouds of reagents meet between the two bottles. The salts produced by the action of ammonia on acids are known as the ammonium salts and all contain the ammonium ion (). Although ammonia is well known as a weak base, it can also act as an extremely weak acid. It is a protic substance and is capable of formation of amides (which contain the ion). For example, lithium dissolves in liquid ammonia to give a blue solution (solvated electron) of lithium amide: Self-dissociation Like water, liquid ammonia undergoes molecular autoionisation to form its acid and base conjugates: Ammonia often functions as a weak base, so it has some buffering ability. Shifts in pH will cause more or fewer ammonium cations () and amide anions () to be present in solution. At standard pressure and temperature, K = = 10−30. Combustion Ammonia does not burn readily or sustain combustion, except under narrow fuel-to-air mixtures of 15–25% air by volume. When mixed with oxygen, it burns with a pale yellowish-green flame. Ignition occurs when chlorine is passed into ammonia, forming nitrogen and hydrogen chloride; if chlorine is present in excess, then the highly explosive nitrogen trichloride () is also formed. The combustion of ammonia to form nitrogen and water is exothermic: , ΔH°r = −1267.20 kJ (or −316.8 kJ/mol if expressed per mol of ) The standard enthalpy change of combustion, ΔH°c, expressed per mole of ammonia and with condensation of the water formed, is −382.81 kJ/mol. Dinitrogen is the thermodynamic product of combustion: all nitrogen oxides are unstable with respect to and , which is the principle behind the catalytic converter. Nitrogen oxides can be formed as kinetic products in the presence of appropriate catalysts, a reaction of great industrial importance in the production of nitric acid: A subsequent reaction leads to : The combustion of ammonia in air is very difficult in the absence of a catalyst (such as platinum gauze or warm chromium(III) oxide), due to the relatively low heat of combustion, a lower laminar burning velocity, high auto-ignition temperature, high heat of vapourization, and a narrow flammability range. However, recent studies have shown that efficient and stable combustion of ammonia can be achieved using swirl combustors, thereby rekindling research interest in ammonia as a fuel for thermal power production. The flammable range of ammonia in dry air is 15.15–27.35% and in 100% relative humidity air is 15.95–26.55%. For studying the kinetics of ammonia combustion, knowledge of a detailed reliable reaction mechanism is required, but this has been challenging to obtain. Formation of other compounds Ammonia is a direct or indirect precursor to most manufactured nitrogen-containing compounds. In organic chemistry, ammonia can act as a nucleophile in substitution reactions. Amines can be formed by the reaction of ammonia with alkyl halides or with alcohols. The resulting − group is also nucleophilic so secondary and tertiary amines are often formed. When such multiple substitution is not desired, an excess of ammonia helps minimise it. For example, methylamine is prepared by the reaction of ammonia with chloromethane or with methanol. In both cases, dimethylamine and trimethylamine are co-produced. Ethanolamine is prepared by a ring-opening reaction with ethylene oxide, and when the reaction is allowed to go further it produces diethanolamine and triethanolamine. The reaction of ammonia with 2-bromopropanoic acid has been used to prepare racemic alanine in 70% yield. Amides can be prepared by the reaction of ammonia with carboxylic acid derivatives. For example, ammonia reacts with formic acid (HCOOH) to yield formamide () when heated. Acyl chlorides are the most reactive, but the ammonia must be present in at least a twofold excess to neutralise the hydrogen chloride formed. Esters and anhydrides also react with ammonia to form amides. Ammonium salts of carboxylic acids can be dehydrated to amides by heating to 150–200 °C as long as no thermally sensitive groups are present. The hydrogen in ammonia is susceptible to replacement by a myriad of substituents. When dry ammonia gas is heated with metallic sodium it converts to sodamide, . With chlorine, monochloramine is formed. Pentavalent ammonia is known as λ5-amine, nitrogen pentahydride, or more commonly, ammonium hydride . This crystalline solid is only stable under high pressure and decomposes back into trivalent ammonia (λ3-amine) and hydrogen gas at normal conditions. This substance was once investigated as a possible solid rocket fuel in 1966. Ammonia as a ligand Ammonia can act as a ligand in transition metal complexes. It is a pure σ-donor, in the middle of the spectrochemical series, and shows intermediate hard–soft behaviour (see also ECW model). Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. For historical reasons, ammonia is named ammine in the nomenclature of coordination compounds. Some notable ammine complexes include tetraamminediaquacopper(II) (), a dark blue complex formed by adding ammonia to a solution of copper(II) salts. Tetraamminediaquacopper(II) hydroxide is known as Schweizer's reagent, and has the remarkable ability to dissolve cellulose. Diamminesilver(I) () is the active species in Tollens' reagent. Formation of this complex can also help to distinguish between precipitates of the different silver halides: silver chloride (AgCl) is soluble in dilute (2 M) ammonia solution, silver bromide (AgBr) is only soluble in concentrated ammonia solution, whereas silver iodide (AgI) is insoluble in aqueous ammonia. Ammine complexes of chromium(III) were known in the late 19th century, and formed the basis of Alfred Werner's revolutionary theory on the structure of coordination compounds. Werner noted only two isomers (fac- and mer-) of the complex could be formed, and concluded the ligands must be arranged around the metal ion at the vertices of an octahedron. This proposal has since been confirmed by X-ray crystallography. An ammine ligand bound to a metal ion is markedly more acidic than a free ammonia molecule, although deprotonation in aqueous solution is still rare. One example is the reaction of mercury(II) chloride with ammonia (Calomel reaction) where the resulting mercuric amidochloride is highly insoluble. Ammonia forms 1:1 adducts with a variety of Lewis acids such as , phenol, and . Ammonia is a hard base (HSAB theory) and its E & C parameters are EB = 2.31 and CB = 2.04. Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. Detection and determination Ammonia in solution Ammonia and ammonium salts can be readily detected, in very minute traces, by the addition of Nessler's solution, which gives a distinct yellow colouration in the presence of the slightest trace of ammonia or ammonium salts. The amount of ammonia in ammonium salts can be estimated quantitatively by distillation of the salts with sodium (NaOH) or potassium hydroxide (KOH), the ammonia evolved being absorbed in a known volume of standard sulfuric acid and the excess of acid then determined volumetrically; or the ammonia may be absorbed in hydrochloric acid and the ammonium chloride so formed precipitated as ammonium hexachloroplatinate, . Gaseous ammonia Sulfur sticks are burnt to detect small leaks in industrial ammonia refrigeration systems. Larger quantities can be detected by warming the salts with a caustic alkali or with quicklime, when the characteristic smell of ammonia will be at once apparent. Ammonia is an irritant and irritation increases with concentration; the permissible exposure limit is 25 ppm, and lethal above 500 ppm. Higher concentrations are hardly detected by conventional detectors, the type of detector is chosen according to the sensitivity required (e.g. semiconductor, catalytic, electrochemical). Holographic sensors have been proposed for detecting concentrations up to 12.5% in volume. Ammoniacal nitrogen (NH3–N) Ammoniacal nitrogen (NH3–N) is a measure commonly used for testing the quantity of ammonium ions, derived naturally from ammonia, and returned to ammonia via organic processes, in water or waste liquids. It is a measure used mainly for quantifying values in waste treatment and water purification systems, as well as a measure of the health of natural and man-made water reserves. It is measured in units of mg/L (milligram per litre). History The ancient Greek historian Herodotus mentioned that there were outcrops of salt in an area of Libya that was inhabited by a people called the 'Ammonians' (now the Siwa oasis in northwestern Egypt, where salt lakes still exist). The Greek geographer Strabo also mentioned the salt from this region. However, the ancient authors Dioscorides, Apicius, Arrian, Synesius, and Aëtius of Amida described this salt as forming clear crystals that could be used for cooking and that were essentially rock salt. Hammoniacus sal appears in the writings of Pliny, although it is not known whether the term is identical with the more modern sal ammoniac (ammonium chloride). The fermentation of urine by bacteria produces a solution of ammonia; hence fermented urine was used in Classical Antiquity to wash cloth and clothing, to remove hair from hides in preparation for tanning, to serve as a mordant in dying cloth, and to remove rust from iron. It was also used by ancient dentists to wash teeth. In the form of sal ammoniac (نشادر, nushadir), ammonia was important to the Muslim alchemists. It was mentioned in the Book of Stones, likely written in the 9th century and attributed to Jābir ibn Hayyān. It was also important to the European alchemists of the 13th century, being mentioned by Albertus Magnus. It was also used by dyers in the Middle Ages in the form of fermented urine to alter the colour of vegetable dyes. In the 15th century, Basilius Valentinus showed that ammonia could be obtained by the action of alkalis on sal ammoniac. At a later period, when sal ammoniac was obtained by distilling the hooves and horns of oxen and neutralizing the resulting carbonate with hydrochloric acid, the name 'spirit of hartshorn' was applied to ammonia. Gaseous ammonia was first isolated by Joseph Black in 1756 by reacting sal ammoniac (ammonium chloride) with calcined magnesia (magnesium oxide). It was isolated again by Peter Woulfe in 1767, by Carl Wilhelm Scheele in 1770 and by Joseph Priestley in 1773 and was termed by him 'alkaline air'. Eleven years later in 1785, Claude Louis Berthollet ascertained its composition. The Haber–Bosch process to produce ammonia from the nitrogen in the air was developed by Fritz Haber and Carl Bosch in 1909 and patented in 1910. It was first used on an industrial scale in Germany during World War I, following the allied blockade that cut off the supply of nitrates from Chile. The ammonia was used to produce explosives to sustain war efforts. Before the availability of natural gas, hydrogen as a precursor to ammonia production was produced via the electrolysis of water or using the chloralkali process. With the advent of the steel industry in the 20th century, ammonia became a byproduct of the production of coking coal. Applications Solvent Liquid ammonia is the best-known and most widely studied nonaqueous ionising solvent. Its most conspicuous property is its ability to dissolve alkali metals to form highly coloured, electrically conductive solutions containing solvated electrons. Apart from these remarkable solutions, much of the chemistry in liquid ammonia can be classified by analogy with related reactions in aqueous solutions. Comparison of the physical properties of with those of water shows has the lower melting point, boiling point, density, viscosity, dielectric constant and electrical conductivity; this is due at least in part to the weaker hydrogen bonding in and because such bonding cannot form cross-linked networks, since each molecule has only one lone pair of electrons compared with two for each molecule. The ionic self-dissociation constant of liquid at −50 °C is about 10−33. Solubility of salts Liquid ammonia is an ionising solvent, although less so than water, and dissolves a range of ionic compounds, including many nitrates, nitrites, cyanides, thiocyanates, metal cyclopentadienyl complexes and metal bis(trimethylsilyl)amides. Most ammonium salts are soluble and act as acids in liquid ammonia solutions. The solubility of halide salts increases from fluoride to iodide. A saturated solution of ammonium nitrate (Divers' solution, named after Edward Divers) contains 0.83 mol solute per mole of ammonia and has a vapour pressure of less than 1 bar even at . Solutions of metals Liquid ammonia will dissolve all of the alkali metals and other electropositive metals such as Ca, Sr, Ba, Eu and Yb (also Mg using an electrolytic process). At low concentrations (<0.06 mol/L), deep blue solutions are formed: these contain metal cations and solvated electrons, free electrons that are surrounded by a cage of ammonia molecules. These solutions are very useful as strong reducing agents. At higher concentrations, the solutions are metallic in appearance and in electrical conductivity. At low temperatures, the two types of solution can coexist as immiscible phases. Redox properties of liquid ammonia The range of thermodynamic stability of liquid ammonia solutions is very narrow, as the potential for oxidation to dinitrogen, E° (), is only +0.04 V. In practice, both oxidation to dinitrogen and reduction to dihydrogen are slow. This is particularly true of reducing solutions: the solutions of the alkali metals mentioned above are stable for several days, slowly decomposing to the metal amide and dihydrogen. Most studies involving liquid ammonia solutions are done in reducing conditions; although oxidation of liquid ammonia is usually slow, there is still a risk of explosion, particularly if transition metal ions are present as possible catalysts. Fertiliser In the US , approximately 88% of ammonia was used as fertilisers either as its salts, solutions or anhydrously. When applied to soil, it helps provide increased yields of crops such as maize and wheat. 30% of agricultural nitrogen applied in the US is in the form of anhydrous ammonia, and worldwide, 110 million tonnes are applied each year. Precursor to nitrogenous compounds Ammonia is directly or indirectly the precursor to most nitrogen-containing compounds. Virtually all synthetic nitrogen compounds are derived from ammonia. An important derivative is nitric acid. This key material is generated via the Ostwald process by oxidation of ammonia with air over a platinum catalyst at , ≈9 atm. Nitric oxide is an intermediate in this conversion: Nitric acid is used for the production of fertilisers, explosives and many organonitrogen compounds. Ammonia is also used to make the following compounds: Hydrazine, in the Olin Raschig process and the peroxide process Hydrogen cyanide, in the BMA process and the Andrussow process Hydroxylamine and ammonium carbonate, in the Raschig process Phenol, in the Raschig–Hooker process Urea, in the Bosch–Meiser urea process and in Wöhler synthesis Amino acids, using Strecker amino-acid synthesis Acrylonitrile, in the Sohio process Ammonia can also be used to make compounds in reactions that are not specifically named. Examples of such compounds include ammonium perchlorate, ammonium nitrate, formamide, dinitrogen tetroxide, alprazolam, ethanolamine, ethyl carbamate, hexamethylenetetramine and ammonium bicarbonate. Cleansing agent Household 'ammonia' is a solution of in water, and is used as a general purpose cleaner for many surfaces. Because ammonia results in a relatively streak-free shine, one of its most common uses is to clean glass, porcelain, and stainless steel. It is also frequently used for cleaning ovens and for soaking items to loosen baked-on grime. Household ammonia ranges in concentration by weight from 5% to 10% ammonia. US manufacturers of cleaning products are required to provide the product's material safety data sheet that lists the concentration used. Solutions of ammonia (5–10% by weight) are used as household cleaners, particularly for glass. These solutions are irritating to the eyes and mucous membranes (respiratory and digestive tracts), and to a lesser extent the skin. Experts advise that caution be used to ensure the chemical is not mixed into any liquid containing bleach, due to the danger of forming toxic chloramine gas. Mixing with chlorine-containing products or strong oxidants, such as household bleach, can generate toxic chloramine fumes. Experts also warn not to use ammonia-based cleaners (such as glass or window cleaners) on car touchscreens, due to the risk of damage to the screen's anti-glare and anti-fingerprint coatings. Fermentation Solutions of ammonia ranging from 16% to 25% are used in the fermentation industry as a source of nitrogen for microorganisms and to adjust pH during fermentation. Antimicrobial agent for food products As early as in 1895, it was known that ammonia was 'strongly antiseptic ... it requires 1.4 grams per litre to preserve beef tea (broth).' In one study, anhydrous ammonia destroyed 99.999% of zoonotic bacteria in three types of animal feed, but not silage. Anhydrous ammonia is currently used commercially to reduce or eliminate microbial contamination of beef. Lean finely textured beef (popularly known as 'pink slime') in the beef industry is made from fatty beef trimmings (c. 50–70% fat) by removing the fat using heat and centrifugation, then treating it with ammonia to kill E. coli. The process was deemed effective and safe by the US Department of Agriculture based on a study that found that the treatment reduces E. coli to undetectable levels. There have been safety concerns about the process as well as consumer complaints about the taste and smell of ammonia-treated beef. Fuel Ammonia has been used as fuel, and is a proposed alternative to fossil fuels and hydrogen in the future. Compared to hydrogen, ammonia is easier to store. Compared to hydrogen as a fuel, ammonia is much more energy efficient, and could be produced, stored and delivered at a much lower cost than hydrogen, which must be kept compressed or as a cryogenic liquid. The raw energy density of liquid ammonia is 11.5 MJ/L, which is about a third that of diesel. Ammonia can be converted back to hydrogen to be used to power hydrogen fuel cells, or it may be used directly within high-temperature solid oxide direct ammonia fuel cells to provide efficient power sources that do not emit greenhouse gases. Ammonia to hydrogen conversion can be achieved through the sodium amide process or the catalytic decomposition of ammonia using solid catalysts. Ammonia engines or ammonia motors, using ammonia as a working fluid, have been proposed and occasionally used. The principle is similar to that used in a fireless locomotive, but with ammonia as the working fluid, instead of steam or compressed air. Ammonia engines were used experimentally in the 19th century by Goldsworthy Gurney in the UK and the St. Charles Avenue Streetcar line in New Orleans in the 1870s and 1880s, and during World War II ammonia was used to power buses in Belgium. Ammonia is sometimes proposed as a practical alternative to fossil fuel for internal combustion engines. However, ammonia cannot be easily used in existing Otto cycle engines because of its very narrow flammability range. Despite this, several tests have been run. Its high octane rating of 120 and low flame temperature allows the use of high compression ratios without a penalty of high production. Since ammonia contains no carbon, its combustion cannot produce carbon dioxide, carbon monoxide, hydrocarbons, or soot. Ammonia production currently creates 1.8% of global emissions. 'Green ammonia' is ammonia produced by using green hydrogen (hydrogen produced by electrolysis), whereas 'blue ammonia' is ammonia produced using blue hydrogen (hydrogen produced by steam methane reforming where the carbon dioxide has been captured and stored). Rocket engines have also been fueled by ammonia. The Reaction Motors XLR99 rocket engine that powered the hypersonic research aircraft used liquid ammonia. Although not as powerful as other fuels, it left no soot in the reusable rocket engine, and its density approximately matches the density of the oxidiser, liquid oxygen, which simplified the aircraft's design. In early August 2018, scientists from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) announced the success of developing a process to release hydrogen from ammonia and harvest that at ultra-high purity as a fuel for cars. This uses a special membrane. Two demonstration fuel cell vehicles have the technology, a Hyundai Nexo and Toyota Mirai. In 2020, Saudi Arabia shipped 40 metric tons of liquid 'blue ammonia' to Japan for use as a fuel. It was produced as a by-product by petrochemical industries, and can be burned without giving off greenhouse gases. Its energy density by volume is nearly double that of liquid hydrogen. If the process of creating it can be scaled up via purely renewable resources, producing green ammonia, it could make a major difference in avoiding climate change. The company ACWA Power and the city of Neom have announced the construction of a green hydrogen and ammonia plant in 2020. Green ammonia is considered as a potential fuel for future container ships. In 2020, the companies DSME and MAN Energy Solutions announced the construction of an ammonia-based ship, DSME plans to commercialize it by 2025. The use of ammonia as a potential alternative fuel for aircraft jet engines is also being explored. Japan intends to implement a plan to develop ammonia co-firing technology that can increase the use of ammonia in power generation, as part of efforts to assist domestic and other Asian utilities to accelerate their transition to carbon neutrality. In October 2021, the first International Conference on Fuel Ammonia (ICFA2021) was held. In June 2022, IHI Corporation succeeded in reducing greenhouse gases by over 99% during combustion of liquid ammonia in a 2,000-kilowatt-class gas turbine achieving truly -free power generation. In July 2022, Quad nations of Japan, the U.S., Australia and India agreed to promote technological development for clean-burning hydrogen and ammonia as fuels at the security grouping's first energy meeting. , however, significant amounts of are produced. Nitrous oxide may also be a problem. Other Remediation of gaseous emissions Ammonia is used to scrub from the burning of fossil fuels, and the resulting product is converted to ammonium sulfate for use as fertiliser. Ammonia neutralises the nitrogen oxide () pollutants emitted by diesel engines. This technology, called SCR (selective catalytic reduction), relies on a vanadia-based catalyst. Ammonia may be used to mitigate gaseous spills of phosgene. As a hydrogen carrier Due to its attributes, being liquid at ambient temperature under its own vapour pressure and having high volumetric and gravimetric energy density, ammonia is considered a suitable carrier for hydrogen, and may be cheaper than direct transport of liquid hydrogen. Refrigeration – R717 Because of ammonia's vapourization properties, it is a useful refrigerant. It was commonly used before the popularisation of chlorofluorocarbons (Freons). Anhydrous ammonia is widely used in industrial refrigeration applications and hockey rinks because of its high energy efficiency and low cost. It suffers from the disadvantage of toxicity, and requiring corrosion resistant components, which restricts its domestic and small-scale use. Along with its use in modern vapour-compression refrigeration it is used in a mixture along with hydrogen and water in absorption refrigerators. The Kalina cycle, which is of growing importance to geothermal power plants, depends on the wide boiling range of the ammonia–water mixture. Ammonia coolant is also used in the S1 radiator aboard the International Space Station in two loops that are used to regulate the internal temperature and enable temperature-dependent experiments. The potential importance of ammonia as a refrigerant has increased with the discovery that vented CFCs and HFCs are extremely potent and stable greenhouse gases. Stimulant Ammonia, as the vapour released by smelling salts, has found significant use as a respiratory stimulant. Ammonia is commonly used in the illegal manufacture of methamphetamine through a Birch reduction. The Birch method of making methamphetamine is dangerous because the alkali metal and liquid ammonia are both extremely reactive, and the temperature of liquid ammonia makes it susceptible to explosive boiling when reactants are added. Textile Liquid ammonia is used for treatment of cotton materials, giving properties like mercerisation, using alkalis. In particular, it is used for prewashing of wool. Lifting gas At standard temperature and pressure, ammonia is less dense than atmosphere and has approximately 45–48% of the lifting power of hydrogen or helium. Ammonia has sometimes been used to fill balloons as a lifting gas. Because of its relatively high boiling point (compared to helium and hydrogen), ammonia could potentially be refrigerated and liquefied aboard an airship to reduce lift and add ballast (and returned to a gas to add lift and reduce ballast). Fuming Ammonia has been used to darken quartersawn white oak in Arts & Crafts and Mission-style furniture. Ammonia fumes react with the natural tannins in the wood and cause it to change colour. Safety The US Occupational Safety and Health Administration (OSHA) has set a 15-minute exposure limit for gaseous ammonia of 35 ppm by volume in the environmental air and an 8-hour exposure limit of 25 ppm by volume. The National Institute for Occupational Safety and Health (NIOSH) recently reduced the IDLH (Immediately Dangerous to Life and Health, the level to which a healthy worker can be exposed for 30 minutes without suffering irreversible health effects) from 500 to 300 based on recent more conservative interpretations of original research in 1943. Other organisations have varying exposure levels. US Navy Standards [U.S. Bureau of Ships 1962] maximum allowable concentrations (MACs): for continuous exposure (60 days) is 25 ppm; for exposure of 1 hour is 400 ppm. Ammonia vapour has a sharp, irritating, pungent odor that acts as a warning of potentially dangerous exposure. The average odor threshold is 5 ppm, well below any danger or damage. Exposure to very high concentrations of gaseous ammonia can result in lung damage and death. Ammonia is regulated in the US as a non-flammable gas, but it meets the definition of a material that is toxic by inhalation and requires a hazardous safety permit when transported in quantities greater than . Liquid ammonia is dangerous because it is hygroscopic and because it can cause caustic burns. See for more information. Toxicity The toxicity of ammonia solutions does not usually cause problems for humans and other mammals, as a specific mechanism exists to prevent its build-up in the bloodstream. Ammonia is converted to carbamoyl phosphate by the enzyme carbamoyl phosphate synthetase, and then enters the urea cycle to be either incorporated into amino acids or excreted in the urine. Fish and amphibians lack this mechanism, as they can usually eliminate ammonia from their bodies by direct excretion. Ammonia even at dilute concentrations is highly toxic to aquatic animals, and for this reason it is classified as dangerous for the environment. Atmospheric ammonia plays a key role in the formation of fine particulate matter. Ammonia is a constituent of tobacco smoke. Coking wastewater Ammonia is present in coking wastewater streams, as a liquid by-product of the production of coke from coal. In some cases, the ammonia is discharged to the marine environment where it acts as a pollutant. The Whyalla steelworks in South Australia is one example of a coke-producing facility that discharges ammonia into marine waters. Aquaculture Ammonia toxicity is believed to be a cause of otherwise unexplained losses in fish hatcheries. Excess ammonia may accumulate and cause alteration of metabolism or increases in the body pH of the exposed organism. Tolerance varies among fish species. At lower concentrations, around 0.05 mg/L, un-ionised ammonia is harmful to fish species and can result in poor growth and feed conversion rates, reduced fecundity and fertility and increase stress and susceptibility to bacterial infections and diseases. Exposed to excess ammonia, fish may suffer loss of equilibrium, hyper-excitability, increased respiratory activity and oxygen uptake and increased heart rate. At concentrations exceeding 2.0 mg/L, ammonia causes gill and tissue damage, extreme lethargy, convulsions, coma, and death. Experiments have shown that the lethal concentration for a variety of fish species ranges from 0.2 to 2.0 mg/L. During winter, when reduced feeds are administered to aquaculture stock, ammonia levels can be higher. Lower ambient temperatures reduce the rate of algal photosynthesis so less ammonia is removed by any algae present. Within an aquaculture environment, especially at large scale, there is no fast-acting remedy to elevated ammonia levels. Prevention rather than correction is recommended to reduce harm to farmed fish and in open water systems, the surrounding environment. Storage information Similar to propane, anhydrous ammonia boils below room temperature when at atmospheric pressure. A storage vessel capable of is suitable to contain the liquid. Ammonia is used in numerous different industrial applications requiring carbon or stainless steel storage vessels. Ammonia with at least 0.2% by weight water content is not corrosive to carbon steel. carbon steel construction storage tanks with 0.2% by weight or more of water could last more than 50 years in service. Experts warn that ammonium compounds not be allowed to come in contact with bases (unless in an intended and contained reaction), as dangerous quantities of ammonia gas could be released. Laboratory The hazards of ammonia solutions depend on the concentration: 'dilute' ammonia solutions are usually 5–10% by weight (< 5.62 mol/L); 'concentrated' solutions are usually prepared at >25% by weight. A 25% (by weight) solution has a density of 0.907 g/cm3, and a solution that has a lower density will be more concentrated. The European Union classification of ammonia solutions is given in the table. The ammonia vapour from concentrated ammonia solutions is severely irritating to the eyes and the respiratory tract, and experts warn that these solutions only be handled in a fume hood. Saturated ('0.880' – see ) solutions can develop a significant pressure inside a closed bottle in warm weather, and experts also warn that the bottle be opened with care. This is not usually a problem for 25% ('0.900') solutions. Experts warn that ammonia solutions not be mixed with halogens, as toxic and/or explosive products are formed. Experts also warn that prolonged contact of ammonia solutions with silver, mercury or iodide salts can also lead to explosive products: such mixtures are often formed in qualitative inorganic analysis, and that it needs to be lightly acidified but not concentrated (<6% w/v) before disposal once the test is completed. Laboratory use of anhydrous ammonia (gas or liquid) Anhydrous ammonia is classified as toxic (T) and dangerous for the environment (N). The gas is flammable (autoignition temperature: 651 °C) and can form explosive mixtures with air (16–25%). The permissible exposure limit (PEL) in the United States is 50 ppm (35 mg/m3), while the IDLH concentration is estimated at 300 ppm. Repeated exposure to ammonia lowers the sensitivity to the smell of the gas: normally the odour is detectable at concentrations of less than 50 ppm, but desensitised individuals may not detect it even at concentrations of 100 ppm. Anhydrous ammonia corrodes copper- and zinc-containing alloys, which makes brass fittings not appropriate for handling the gas. Liquid ammonia can also attack rubber and certain plastics. Ammonia reacts violently with the halogens. Nitrogen triiodide, a primary high explosive, is formed when ammonia comes in contact with iodine. Ammonia causes the explosive polymerisation of ethylene oxide. It also forms explosive fulminating compounds with compounds of gold, silver, mercury, germanium or tellurium, and with stibine. Violent reactions have also been reported with acetaldehyde, hypochlorite solutions, potassium ferricyanide and peroxides. Production Ammonia has one of the highest rates of production of any inorganic chemical. Production is sometimes expressed in terms of 'fixed nitrogen'. Global production was estimated as being 160 million tonnes in 2020 (147 tons of fixed nitrogen). China accounted for 26.5% of that, followed by Russia at 11.0%, the United States at 9.5%, and India at 8.3%. Before the start of World War I, most ammonia was obtained by the dry distillation of nitrogenous vegetable and animal waste products, including camel dung, where it was distilled by the reduction of nitrous acid and nitrites with hydrogen; in addition, it was produced by the distillation of coal, and also by the decomposition of ammonium salts by alkaline hydroxides such as quicklime: For small scale laboratory synthesis, one can heat urea and calcium hydroxide: Haber–Bosch Electrochemical Ammonia can be synthesized electrochemically. The only required inputs are sources of nitrogen (potentially atmospheric) and hydrogen (water), allowing generation at the point of use. The availability of renewable energy creates the possibility of zero emission production. 'Green Ammonia' is a name for ammonia produced from hydrogen that is in turn produced from carbon-free sources such as electrolysis of water. Ammonia from this source can be used as a liquid fuel with zero contribution to global climate change. Another electrochemical synthesis mode involves the reductive formation of lithium nitride, which can be protonated to ammonia, given a proton source. Ethanol has been used as such a source, although it may degrade. The first use of this chemistry was reported in 1930, where lithium solutions in ethanol were used to produce ammonia at pressures of up to 1000 bar. In 1994, Tsuneto et al. used lithium electrodeposition in tetrahydrofuran to synthesize ammonia at more moderate pressures with reasonable Faradaic efficiency. Other studies have since used the ethanol–tetrahydrofuran system for electrochemical ammonia synthesis. In 2019, Lazouski et al. proposed a mechanism to explain observed ammonia formation kinetics. In 2020, Lazouski et al. developed a solvent-agnostic gas diffusion electrode to improve nitrogen transport to the reactive lithium. The study observed production rates of up to 30 ± 5 nmol/s/cm2 and Faradaic efficiencies of up to 47.5 ± 4% at ambient temperature and 1 bar pressure. In 2021, Suryanto et al. replaced ethanol with a tetraalkyl phosphonium salt. This cation can stably undergo deprotonation–reprotonation cycles, while it enhances the medium's ionic conductivity. The study observed production rates of 53 ± 1 nmol/s/cm2 at 69 ± 1% faradaic efficiency experiments under 0.5-bar hydrogen and 19.5-bar nitrogen partial pressure at ambient temperature. Role in biological systems and human disease Ammonia is both a metabolic waste and a metabolic input throughout the biosphere. It is an important source of nitrogen for living systems. Although atmospheric nitrogen abounds (more than 75%), few living creatures are capable of using atmospheric nitrogen in its diatomic form, gas. Therefore, nitrogen fixation is required for the synthesis of amino acids, which are the building blocks of protein. Some plants rely on ammonia and other nitrogenous wastes incorporated into the soil by decaying matter. Others, such as nitrogen-fixing legumes, benefit from symbiotic relationships with rhizobia bacteria that create ammonia from atmospheric nitrogen. In humans, inhaling ammonia in high concentrations can be fatal. Exposure to ammonia can cause headaches, edema, impaired memory, seizures and coma as it is neurotoxic in nature. Biosynthesis In certain organisms, ammonia is produced from atmospheric nitrogen by enzymes called nitrogenases. The overall process is called nitrogen fixation. Intense effort has been directed toward understanding the mechanism of biological nitrogen fixation. The scientific interest in this problem is motivated by the unusual structure of the active site of the enzyme, which consists of an ensemble. Ammonia is also a metabolic product of amino acid deamination catalyzed by enzymes such as glutamate dehydrogenase 1. Ammonia excretion is common in aquatic animals. In humans, it is quickly converted to urea (by liver), which is much less toxic, particularly less basic. This urea is a major component of the dry weight of urine. Most reptiles, birds, insects, and snails excrete uric acid solely as nitrogenous waste. Physiology Ammonia plays a role in both normal and abnormal animal physiology. It is biosynthesised through normal amino acid metabolism and is toxic in high concentrations. The liver converts ammonia to urea through a series of reactions known as the urea cycle. Liver dysfunction, such as that seen in cirrhosis, may lead to elevated amounts of ammonia in the blood (hyperammonemia). Likewise, defects in the enzymes responsible for the urea cycle, such as ornithine transcarbamylase, lead to hyperammonemia. Hyperammonemia contributes to the confusion and coma of hepatic encephalopathy, as well as the neurologic disease common in people with urea cycle defects and organic acidurias. Ammonia is important for normal animal acid/base balance. After formation of ammonium from glutamine, α-ketoglutarate may be degraded to produce two bicarbonate ions, which are then available as buffers for dietary acids. Ammonium is excreted in the urine, resulting in net acid loss. Ammonia may itself diffuse across the renal tubules, combine with a hydrogen ion, and thus allow for further acid excretion. Excretion Ammonium ions are a toxic waste product of metabolism in animals. In fish and aquatic invertebrates, it is excreted directly into the water. In mammals, sharks, and amphibians, it is converted in the urea cycle to urea, which is less toxic and can be stored more efficiently. In birds, reptiles, and terrestrial snails, metabolic ammonium is converted into uric acid, which is solid and can therefore be excreted with minimal water loss. Beyond Earth Ammonia has been detected in the atmospheres of the giant planets Jupiter, Saturn, Uranus and Neptune, along with other gases such as methane, hydrogen, and helium. The interior of Saturn may include frozen ammonia crystals. It is found on Deimos and Phobos – the two moons of Mars. Interstellar space Ammonia was first detected in interstellar space in 1968, based on microwave emissions from the direction of the galactic core. This was the first polyatomic molecule to be so detected. The sensitivity of the molecule to a broad range of excitations and the ease with which it can be observed in a number of regions has made ammonia one of the most important molecules for studies of molecular clouds. The relative intensity of the ammonia lines can be used to measure the temperature of the emitting medium. The following isotopic species of ammonia have been detected: , , , , and . The detection of triply deuterated ammonia was considered a surprise as deuterium is relatively scarce. It is thought that the low-temperature conditions allow this molecule to survive and accumulate. Since its interstellar discovery, has proved to be an invaluable spectroscopic tool in the study of the interstellar medium. With a large number of transitions sensitive to a wide range of excitation conditions, has been widely astronomically detected – its detection has been reported in hundreds of journal articles. Listed below is a sample of journal articles that highlights the range of detectors that have been used to identify ammonia. The study of interstellar ammonia has been important to a number of areas of research in the last few decades. Some of these are delineated below and primarily involve using ammonia as an interstellar thermometer. Interstellar formation mechanisms The interstellar abundance for ammonia has been measured for a variety of environments. The []/[] ratio has been estimated to range from 10−7 in small dark clouds up to 10−5 in the dense core of the Orion molecular cloud complex. Although a total of 18 total production routes have been proposed, the principal formation mechanism for interstellar is the reaction: The rate constant, k, of this reaction depends on the temperature of the environment, with a value of at 10 K. The rate constant was calculated from the formula . For the primary formation reaction, and . Assuming an abundance of and an electron abundance of 10−7 typical of molecular clouds, the formation will proceed at a rate of in a molecular cloud of total density . All other proposed formation reactions have rate constants of between two and 13 orders of magnitude smaller, making their contribution to the abundance of ammonia relatively insignificant. As an example of the minor contribution other formation reactions play, the reaction: has a rate constant of 2.2. Assuming densities of 105 and []/[] ratio of 10−7, this reaction proceeds at a rate of 2.2, more than three orders of magnitude slower than the primary reaction above. Some of the other possible formation reactions are: Interstellar destruction mechanisms There are 113 total proposed reactions leading to the destruction of . Of these, 39 were tabulated in extensive tables of the chemistry among C, N and O compounds. A review of interstellar ammonia cites the following reactions as the principal dissociation mechanisms: with rate constants of 4.39×10−9 and 2.2×10−9, respectively. The above equations (, ) run at a rate of 8.8×10−9 and 4.4×10−13, respectively. These calculations assumed the given rate constants and abundances of []/[] = 10−5, []/[] = 2×10−5, []/[] = 2×10−9, and total densities of n = 105, typical of cold, dense, molecular clouds. Clearly, between these two primary reactions, equation () is the dominant destruction reaction, with a rate ≈10,000 times faster than equation (). This is due to the relatively high abundance of . Single antenna detections Radio observations of from the Effelsberg 100-m Radio Telescope reveal that the ammonia line is separated into two components – a background ridge and an unresolved core. The background corresponds well with the locations previously detected CO. The 25 m Chilbolton telescope in England detected radio signatures of ammonia in H II regions, HNH2O masers, H–H objects, and other objects associated with star formation. A comparison of emission line widths indicates that turbulent or systematic velocities do not increase in the central cores of molecular clouds. Microwave radiation from ammonia was observed in several galactic objects including W3(OH), Orion A, W43, W51, and five sources in the galactic centre. The high detection rate indicates that this is a common molecule in the interstellar medium and that high-density regions are common in the galaxy. Interferometric studies VLA observations of in seven regions with high-velocity gaseous outflows revealed condensations of less than 0.1 pc in L1551, S140, and Cepheus A. Three individual condensations were detected in Cepheus A, one of them with a highly elongated shape. They may play an important role in creating the bipolar outflow in the region. Extragalactic ammonia was imaged using the VLA in IC 342. The hot gas has temperatures above 70 K, which was inferred from ammonia line ratios and appears to be closely associated with the innermost portions of the nuclear bar seen in CO. was also monitored by VLA toward a sample of four galactic ultracompact HII regions: G9.62+0.19, G10.47+0.03, G29.96-0.02, and G31.41+0.31. Based upon temperature and density diagnostics, it is concluded that in general such clumps are probably the sites of massive star formation in an early evolutionary phase prior to the development of an ultracompact HII region. Infrared detections Absorption at 2.97 micrometres due to solid ammonia was recorded from interstellar grains in the Becklin–Neugebauer Object and probably in NGC 2264-IR as well. This detection helped explain the physical shape of previously poorly understood and related ice absorption lines. A spectrum of the disk of Jupiter was obtained from the Kuiper Airborne Observatory, covering the 100 to 300 cm−1 spectral range. Analysis of the spectrum provides information on global mean properties of ammonia gas and an ammonia ice haze. A total of 149 dark cloud positions were surveyed for evidence of 'dense cores' by using the (J,K) = (1,1) rotating inversion line of NH3. In general, the cores are not spherically shaped, with aspect ratios ranging from 1.1 to 4.4. It is also found that cores with stars have broader lines than cores without stars. Ammonia has been detected in the Draco Nebula and in one or possibly two molecular clouds, which are associated with the high-latitude galactic infrared cirrus. The finding is significant because they may represent the birthplaces for the Population I metallicity B-type stars in the galactic halo that could have been borne in the galactic disk. Observations of nearby dark clouds By balancing and stimulated emission with spontaneous emission, it is possible to construct a relation between excitation temperature and density. Moreover, since the transitional levels of ammonia can be approximated by a 2-level system at low temperatures, this calculation is fairly simple. This premise can be applied to dark clouds, regions suspected of having extremely low temperatures and possible sites for future star formation. Detections of ammonia in dark clouds show very narrow linesindicative not only of low temperatures, but also of a low level of inner-cloud turbulence. Line ratio calculations provide a measurement of cloud temperature that is independent of previous CO observations. The ammonia observations were consistent with CO measurements of rotation temperatures of ≈10 K. With this, densities can be determined, and have been calculated to range between 104 and 105 cm−3 in dark clouds. Mapping of gives typical clouds sizes of 0.1 pc and masses near 1 solar mass. These cold, dense cores are the sites of future star formation. UC HII regions Ultra-compact HII regions are among the best tracers of high-mass star formation. The dense material surrounding UCHII regions is likely primarily molecular. Since a complete study of massive star formation necessarily involves the cloud from which the star formed, ammonia is an invaluable tool in understanding this surrounding molecular material. Since this molecular material can be spatially resolved, it is possible to constrain the heating/ionising sources, temperatures, masses, and sizes of the regions. Doppler-shifted velocity components allow for the separation of distinct regions of molecular gas that can trace outflows and hot cores originating from forming stars. Extragalactic detection Ammonia has been detected in external galaxies, and by simultaneously measuring several lines, it is possible to directly measure the gas temperature in these galaxies. Line ratios imply that gas temperatures are warm (≈50 K), originating from dense clouds with sizes of tens of parsecs. This picture is consistent with the picture within our Milky Way galaxyhot dense molecular cores form around newly forming stars embedded in larger clouds of molecular material on the scale of several hundred parsecs (giant molecular clouds; GMCs). See also Notes References Works cited Further reading External links International Chemical Safety Card 0414 (anhydrous ammonia), ilo.org. International Chemical Safety Card 0215 (aqueous solutions), ilo.org. Emergency Response to Ammonia Fertiliser Releases (Spills) for the Minnesota Department of Agriculture.ammoniaspills.org National Institute for Occupational Safety and Health – Ammonia Page, cdc.gov NIOSH Pocket Guide to Chemical Hazards – Ammonia, cdc.gov Ammonia, video Bases (chemistry) Foul-smelling chemicals Gaseous signaling molecules Household chemicals Industrial gases Inorganic solvents Nitrogen cycle Nitrogen hydrides Nitrogen(−III) compounds Refrigerants Toxicology	21
Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω (Ancient Greek) / μεθώ (Modern Greek), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. Ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst, a semiprecious stone, is often used in jewelry. Structure Amethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, impurities of iron (Fe3+) and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. The irradiation causes the iron Fe3+ ions that replace Si in the lattice to lose an electron and form a [FeO4]0 color center. Amethyst is a three-dimensional network of tetrahedra where the silicon atoms are in the center and are surrounded by four oxygen atoms located at the vertices of a tetrahedron. This structure is quite rigid and results in quartz's hardness and resistance to weathering. The hardness of the mineral is the same as quartz, thus making it suitable for use in jewelry. Hue and tone Amethyst occurs in primary hues from a light lavender or pale violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. High-quality amethyst can be found in Siberia, Sri Lanka, Brazil, Uruguay, and the Far East. The ideal grade, called "Deep Siberian", has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. "Rose de France" is defined by its markedly light shade of the purple, reminiscent of a lavender/lilac shade. These pale colors were once considered undesirable, but have recently become popular due to intensive marketing. Green quartz is sometimes incorrectly called green amethyst; this is a misnomer and not an appropriate name for the material, as the proper terminology is prasiolite. Other names for green quartz are vermarine or lime citrine. Amethyst frequently shows color zoning, with the most intense color typically found at the crystal terminations. One of a gem cutter’s tasks is to make a finished product with even color. Sometimes, only a thin layer of a natural, uncut amethyst is violet colored, or the color is very uneven. The uncut gem may have only a small portion that is suitable for faceting. The color of amethyst has been demonstrated to result from substitution by irradiation of trivalent iron (Fe3+) for silicon in the structure, in the presence of trace elements of large ionic radius, and to a certain extent, the amethyst color can naturally result from displacement of transition elements even if the iron concentration is low. Natural amethyst is dichroic in reddish violet and bluish violet, but when heated, turns yellow-orange, yellow-brown, or dark brownish and may resemble citrine, but loses its dichroism, unlike genuine citrine. When partially heated, amethyst can result in ametrine. Amethyst can fade in tone if overexposed to light sources, and can be artificially darkened with adequate irradiation. It does not fluoresce under either short-wave or long-wave UV light. Geographic distribution Amethyst is found in many locations around the world. Between 2000 and 2010, the greatest production was from Marabá and Pau d'Arco, Pará, and the Paraná Basin, Rio Grande do Sul, Brazil; Sandoval, Santa Cruz, Bolivia; Artigas, Uruguay; Kalomo, Zambia; and Thunder Bay, Ontario. Lesser amounts are found in many other locations in Africa, Brazil, Spain, Argentina, Russia, Afghanistan, South Korea, Mexico, and the United States.Amethyst is produced in abundance in the state of Rio Grande do Sul in Brazil where it occurs in large geodes within volcanic rocks. Many of the hollow agates of southwestern Brazil and Uruguay contain a crop of amethyst crystals in the interior. Artigas, Uruguay and neighboring Brazilian state Rio Grande do Sul are large world producers, with lesser quantities mined in Minas Gerais and Bahia states. The largest amethyst geode found to date was the Empress of Uruguay, found in Artigas, Uruguay in 2007. It stands at a height of 3.27 meters, lays open along its length, and weighs 2.5 tons. Amethyst is also found and mined in South Korea. The large opencast amethyst vein at Maissau, Lower Austria, was historically important, but is no longer included among significant producers. Much fine amethyst comes from Russia, especially near Mursinka in the Ekaterinburg district, where it occurs in drusy cavities in granitic rocks. Amethyst was historically mined in many localities in south India, though these are no longer significant producers. One of the largest global amethyst producers is Zambia in southern Africa, with an annual production around 1000 tons. Amethyst occurs at many localities in the United States. The most important production is at Four Peaks, Gila and Maricopa Counties, Arizona, and Jackson's Crossroads, Wilkes County, Georgia. Smaller occurrences have been reported in the Red Feather Lakes, near Fort Collins, Colorado; Amethyst Mountain, Texas; Yellowstone National Park; Delaware County, Pennsylvania; Haywood County, North Carolina; Deer Hill and Stow, Maine, and in the Lake Superior region of Minnesota, Wisconsin, and Michigan. Amethyst is relatively common in the Canadian provinces of Ontario and Nova Scotia. The largest amethyst mine in North America is located in Thunder Bay, Ontario. Amethyst is the official state gemstone of South Carolina. Several South Carolina amethysts are on display at the Smithsonian Museum of Natural History. History Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglio engraved gems. The ancient Greeks believed amethyst gems could prevent intoxication, while medieval European soldiers wore amethyst amulets as protection in battle in the belief that amethysts heal people and keep them cool-headed. Beads of amethyst were found in Anglo-Saxon graves in England. Anglican bishops wear an episcopal ring often set with an amethyst, an allusion to the description of the Apostles as "not drunk" at Pentecost in Acts 2:15. A large geode, or "amethyst-grotto", from near Santa Cruz in southern Brazil was presented at a 1902 exhibition in Düsseldorf, Germany. The meaning of amethyst varies from time to time and culture, which is why amethyst has different meanings in Feng Shui and focuses on increasing wealth. In ancient China, it was also used as a powerful tool to remove negative energies and drive away the hazards of daily life. Synthetic amethyst Synthetic (laboratory-grown) amethyst is produced by a synthesis method called hydrothermal growth, which grows the crystals inside a high-pressure autoclave. Synthetic amethyst is made to imitate the best quality amethyst. Its chemical and physical properties are the same as those of natural amethyst, and it cannot be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). One test based on "Brazil law twinning" (a form of quartz twinning where right- and left-hand quartz structures are combined in a single crystal) can be used to identify most synthetic amethyst rather easily. Synthesizing twinned amethyst is possible, but this type is not available in large quantities in the market. Treated amethyst is produced by gamma ray, X-ray, or electron-beam irradiation of clear quartz (rock crystal), which has been first doped with ferric impurities. Exposure to heat partially cancels the irradiation effects and amethyst generally becomes yellow or even green. Much of the citrine, cairngorm, or yellow quartz of jewelry is said to be merely "burnt amethyst". Cultural history Ancient Greece The Greek word amethystos may be translated as "not drunken", from Greek a-, "not" + , "intoxicated". Amethyst was considered to be a strong antidote against drunkenness, which is why wine goblets were often carved from it. In his poem "L'Amethyste, ou les Amours de Bacchus et d'Amethyste" (Amethyst or the loves of Bacchus and Amethyste), the French poet Rémy Belleau (1528–1577) invented a myth in which Bacchus, the god of intoxication, of wine, and grapes was pursuing a maiden named Amethyste, who refused his affections. Amethyste prayed to the gods to remain chaste, a prayer which the chaste goddess Diana answered, transforming her into a white stone. Humbled by Amethyste's desire to remain chaste, Bacchus poured wine over the stone as an offering, dyeing the crystals purple. Variations of the story include that Dionysus had been insulted by a mortal and swore to slay the next mortal who crossed his path, creating fierce tigers to carry out his wrath. The mortal turned out to be a beautiful young woman, Amethystos, who was on her way to pay tribute to Artemis. Her life was spared by Artemis, who transformed the maiden into a statue of pure crystalline quartz to protect her from the brutal claws. Dionysus wept tears of wine in remorse for his action at the sight of the beautiful statue. The god's tears then stained the quartz purple. This myth and its variations are not found in classical sources. However, the goddess Rhea does present Dionysus with an amethyst stone to preserve the wine-drinker's sanity in historical text. Other cultural associations Tibetans consider amethyst sacred to the Buddha and make prayer beads from it. Amethyst is considered the birthstone of February. In the Middle Ages, it was considered a symbol of royalty and used to decorate English regalia. In the Old World, amethyst was considered one of the cardinal gems, in that it was one of the five gemstones considered precious above all others, until large deposits were found in Brazil. Value Until the 18th century, amethyst was included in the cardinal, or most valuable, gemstones (along with diamond, sapphire, ruby, and emerald), but since the discovery of extensive deposits in locations such as Brazil, it has lost most of its value. It is now considered a semiprecious stone. Collectors look for depth of color, possibly with red flashes if cut conventionally. As amethyst is readily available in large structures, the value of the gem is not primarily defined by carat weight. This is different from most gemstones, since the carat weight typically exponentially increases the value of the stone. The biggest factor in the value of amethyst is the color displayed. The highest-grade amethyst (called "Deep Russian") is exceptionally rare. When one is found, its value is dependent on the demand of collectors. The highest-grade sapphires or rubies are still orders of magnitude more expensive than amethyst. Handling and care The most suitable setting for gem amethyst is a prong or a bezel setting. The channel method must be used with caution. Amethyst has a good hardness, and handling it with proper care will prevent any damage to the stone. Amethyst is sensitive to strong heat and may lose or change its colour when exposed to prolonged heat or light. Polishing the stone or cleaning it by ultrasonic or steamer must be done with caution. See also Ametrine List of minerals Specimen Ridge References Kostov, R. I. 1992. Amethyst. A Geological-Mineralogical and Gemmological Essay. Union of Scientists in Bulgaria, Sofia, 249 p. (in Bulgarian with English abstract) Lieber, W. 1994. Amethyst. Geschichte, Eigenschaften, Fundorte. Christian Weise Verlag, München, 188 S. External links Quartz gemstones Provincial symbols of Ontario Trigonal minerals Minerals in space group 152 or 154	6
In computer programming, assembly language (alternatively assembler language or symbolic machine code), often referred to simply as assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. Assembly language usually has one statement per machine instruction (1:1), but constants, comments, assembler directives, symbolic labels of, e.g., memory locations, registers, and macros are generally also supported. The first assembly code in which a language is used to represent machine code instructions is found in Kathleen and Andrew Donald Booth's 1947 work, Coding for A.R.C.. Assembly code is converted into executable machine code by a utility program referred to as an assembler. The term "assembler" is generally attributed to Wilkes, Wheeler and Gill in their 1951 book The Preparation of Programs for an Electronic Digital Computer, who, however, used the term to mean "a program that assembles another program consisting of several sections into a single program". The conversion process is referred to as assembly, as in assembling the source code. The computational step when an assembler is processing a program is called assembly time. Because assembly depends on the machine code instructions, each assembly language is specific to a particular computer architecture. Sometimes there is more than one assembler for the same architecture, and sometimes an assembler is specific to an operating system or to particular operating systems. Most assembly languages do not provide specific syntax for operating system calls, and most assembly languages can be used universally with any operating system, as the language provides access to all the real capabilities of the processor, upon which all system call mechanisms ultimately rest. In contrast to assembly languages, most high-level programming languages are generally portable across multiple architectures but require interpreting or compiling, much more complicated tasks than assembling. In the first decades of computing, it was commonplace for both systems programming and application programming to take place entirely in assembly language. While still irreplaceable for some purposes, the majority of programming is now conducted in higher-level interpreted and compiled languages. In "No Silver Bullet", Fred Brooks summarised the effects of the switch away from assembly language programming: "Surely the most powerful stroke for software productivity, reliability, and simplicity has been the progressive use of high-level languages for programming. Most observers credit that development with at least a factor of five in productivity, and with concomitant gains in reliability, simplicity, and comprehensibility." Today, it is typical to use small amounts of assembly language code within larger systems implemented in a higher-level language, for performance reasons or to interact directly with hardware in ways unsupported by the higher-level language. For instance, just under 2% of version 4.9 of the Linux kernel source code is written in assembly; more than 97% is written in C. Assembly language syntax Assembly language uses a mnemonic to represent, e.g., each low-level machine instruction or opcode, each directive, typically also each architectural register, flag, etc. Some of the mnemonics may be built in and some user defined. Many operations require one or more operands in order to form a complete instruction. Most assemblers permit named constants, registers, and labels for program and memory locations, and can calculate expressions for operands. Thus, programmers are freed from tedious repetitive calculations and assembler programs are much more readable than machine code. Depending on the architecture, these elements may also be combined for specific instructions or addressing modes using offsets or other data as well as fixed addresses. Many assemblers offer additional mechanisms to facilitate program development, to control the assembly process, and to aid debugging. Some are column oriented, with specific fields in specific columns; this was very common for machines using punched cards in the 1950s and early 1960s. Some assemblers have free-form syntax, with fields separated by delimiters, e.g., punctuation, white space. Some assemblers are hybrid, with, e.g., labels, in a specific column and other fields separated by delimiters; this became more common than column oriented syntax in the 1960s. Terminology A macro assembler is an assembler that includes a macroinstruction facility so that (parameterized) assembly language text can be represented by a name, and that name can be used to insert the expanded text into other code. Open code refers to any assembler input outside of a macro definition. A cross assembler (see also cross compiler) is an assembler that is run on a computer or operating system (the host system) of a different type from the system on which the resulting code is to run (the target system). Cross-assembling facilitates the development of programs for systems that do not have the resources to support software development, such as an embedded system or a microcontroller. In such a case, the resulting object code must be transferred to the target system, via read-only memory (ROM, EPROM, etc.), a programmer (when the read-only memory is integrated in the device, as in microcontrollers), or a data link using either an exact bit-by-bit copy of the object code or a text-based representation of that code (such as Intel hex or Motorola S-record). A high-level assembler is a program that provides language abstractions more often associated with high-level languages, such as advanced control structures (IF/THEN/ELSE, DO CASE, etc.) and high-level abstract data types, including structures/records, unions, classes, and sets. A microassembler is a program that helps prepare a microprogram, called firmware, to control the low level operation of a computer. A meta-assembler is "a program that accepts the syntactic and semantic description of an assembly language, and generates an assembler for that language", or that accepts an assembler source file along with such a description and assembles the source file in accordance with that description. "Meta-Symbol" assemblers for the SDS 9 Series and SDS Sigma series of computers are meta-assemblers. Sperry Univac also provided a Meta-Assembler for the UNIVAC 1100/2200 series. inline assembler (or embedded assembler) is assembler code contained within a high-level language program. This is most often used in systems programs which need direct access to the hardware. Key concepts Assembler An assembler program creates object code by translating combinations of mnemonics and syntax for operations and addressing modes into their numerical equivalents. This representation typically includes an operation code ("opcode") as well as other control bits and data. The assembler also calculates constant expressions and resolves symbolic names for memory locations and other entities. The use of symbolic references is a key feature of assemblers, saving tedious calculations and manual address updates after program modifications. Most assemblers also include macro facilities for performing textual substitution – e.g., to generate common short sequences of instructions as inline, instead of called subroutines. Some assemblers may also be able to perform some simple types of instruction set-specific optimizations. One concrete example of this may be the ubiquitous x86 assemblers from various vendors. Called jump-sizing, most of them are able to perform jump-instruction replacements (long jumps replaced by short or relative jumps) in any number of passes, on request. Others may even do simple rearrangement or insertion of instructions, such as some assemblers for RISC architectures that can help optimize a sensible instruction scheduling to exploit the CPU pipeline as efficiently as possible. Assemblers have been available since the 1950s, as the first step above machine language and before high-level programming languages such as Fortran, Algol, COBOL and Lisp. There have also been several classes of translators and semi-automatic code generators with properties similar to both assembly and high-level languages, with Speedcode as perhaps one of the better-known examples. There may be several assemblers with different syntax for a particular CPU or instruction set architecture. For instance, an instruction to add memory data to a register in a x86-family processor might be add eax,[ebx], in original Intel syntax, whereas this would be written addl (%ebx),%eax in the AT&T syntax used by the GNU Assembler. Despite different appearances, different syntactic forms generally generate the same numeric machine code. A single assembler may also have different modes in order to support variations in syntactic forms as well as their exact semantic interpretations (such as FASM-syntax, TASM-syntax, ideal mode, etc., in the special case of x86 assembly programming). Number of passes There are two types of assemblers based on how many passes through the source are needed (how many times the assembler reads the source) to produce the object file. One-pass assemblers process the source code once. For symbols used before they are defined, the assembler will emit "errata" after the eventual definition, telling the linker or the loader to patch the locations where the as yet undefined symbols had been used. Multi-pass assemblers create a table with all symbols and their values in the first passes, then use the table in later passes to generate code. In both cases, the assembler must be able to determine the size of each instruction on the initial passes in order to calculate the addresses of subsequent symbols. This means that if the size of an operation referring to an operand defined later depends on the type or distance of the operand, the assembler will make a pessimistic estimate when first encountering the operation, and if necessary, pad it with one or more "no-operation" instructions in a later pass or the errata. In an assembler with peephole optimization, addresses may be recalculated between passes to allow replacing pessimistic code with code tailored to the exact distance from the target. The original reason for the use of one-pass assemblers was memory size and speed of assembly – often a second pass would require storing the symbol table in memory (to handle forward references), rewinding and rereading the program source on tape, or rereading a deck of cards or punched paper tape. Later computers with much larger memories (especially disc storage), had the space to perform all necessary processing without such re-reading. The advantage of the multi-pass assembler is that the absence of errata makes the linking process (or the program load if the assembler directly produces executable code) faster. Example: in the following code snippet, a one-pass assembler would be able to determine the address of the backward reference BKWD when assembling statement S2, but would not be able to determine the address of the forward reference FWD when assembling the branch statement S1; indeed, FWD may be undefined. A two-pass assembler would determine both addresses in pass 1, so they would be known when generating code in pass 2. B ... EQU * ... EQU * ... B High-level assemblers More sophisticated high-level assemblers provide language abstractions such as: High-level procedure/function declarations and invocations Advanced control structures (IF/THEN/ELSE, SWITCH) High-level abstract data types, including structures/records, unions, classes, and sets Sophisticated macro processing (although available on ordinary assemblers since the late 1950s for, e.g., the IBM 700 series and IBM 7000 series, and since the 1960s for IBM System/360 (S/360), amongst other machines) Object-oriented programming features such as classes, objects, abstraction, polymorphism, and inheritance See Language design below for more details. Assembly language A program written in assembly language consists of a series of mnemonic processor instructions and meta-statements (known variously as declarative operations, directives, pseudo-instructions, pseudo-operations and pseudo-ops), comments and data. Assembly language instructions usually consist of an opcode mnemonic followed by an operand, which might be a list of data, arguments or parameters. Some instructions may be "implied", which means the data upon which the instruction operates is implicitly defined by the instruction itself—such an instruction does not take an operand. The resulting statement is translated by an assembler into machine language instructions that can be loaded into memory and executed. For example, the instruction below tells an x86/IA-32 processor to move an immediate 8-bit value into a register. The binary code for this instruction is 10110 followed by a 3-bit identifier for which register to use. The identifier for the AL register is 000, so the following machine code loads the AL register with the data 01100001. 10110000 01100001 This binary computer code can be made more human-readable by expressing it in hexadecimal as follows. B0 61 Here, B0 means 'Move a copy of the following value into AL, and 61 is a hexadecimal representation of the value 01100001, which is 97 in decimal. Assembly language for the 8086 family provides the mnemonic MOV (an abbreviation of move) for instructions such as this, so the machine code above can be written as follows in assembly language, complete with an explanatory comment if required, after the semicolon. This is much easier to read and to remember. MOV AL, 61h ; Load AL with 97 decimal (61 hex) In some assembly languages (including this one) the same mnemonic, such as MOV, may be used for a family of related instructions for loading, copying and moving data, whether these are immediate values, values in registers, or memory locations pointed to by values in registers or by immediate (a.k.a. direct) addresses. Other assemblers may use separate opcode mnemonics such as L for "move memory to register", ST for "move register to memory", LR for "move register to register", MVI for "move immediate operand to memory", etc. If the same mnemonic is used for different instructions, that means that the mnemonic corresponds to several different binary instruction codes, excluding data (e.g. the 61h in this example), depending on the operands that follow the mnemonic. For example, for the x86/IA-32 CPUs, the Intel assembly language syntax MOV AL, AH represents an instruction that moves the contents of register AH into register AL. The hexadecimal form of this instruction is: 88 E0 The first byte, 88h, identifies a move between a byte-sized register and either another register or memory, and the second byte, E0h, is encoded (with three bit-fields) to specify that both operands are registers, the source is AH, and the destination is AL. In a case like this where the same mnemonic can represent more than one binary instruction, the assembler determines which instruction to generate by examining the operands. In the first example, the operand 61h is a valid hexadecimal numeric constant and is not a valid register name, so only the B0 instruction can be applicable. In the second example, the operand AH is a valid register name and not a valid numeric constant (hexadecimal, decimal, octal, or binary), so only the 88 instruction can be applicable. Assembly languages are always designed so that this sort of lack of ambiguity is universally enforced by their syntax. For example, in the Intel x86 assembly language, a hexadecimal constant must start with a numeral digit, so that the hexadecimal number 'A' (equal to decimal ten) would be written as 0Ah or 0AH, not AH, specifically so that it cannot appear to be the name of register AH. (The same rule also prevents ambiguity with the names of registers BH, CH, and DH, as well as with any user-defined symbol that ends with the letter H and otherwise contains only characters that are hexadecimal digits, such as the word "BEACH".) Returning to the original example, while the x86 opcode 10110000 (B0) copies an 8-bit value into the AL register, 10110001 (B1) moves it into CL and 10110010 (B2) does so into DL. Assembly language examples for these follow. MOV AL, 1h ; Load AL with immediate value 1 MOV CL, 2h ; Load CL with immediate value 2 MOV DL, 3h ; Load DL with immediate value 3 The syntax of MOV can also be more complex as the following examples show. MOV EAX, [EBX] ; Move the 4 bytes in memory at the address contained in EBX into EAX MOV [ESI+EAX], CL ; Move the contents of CL into the byte at address ESI+EAX MOV DS, DX ; Move the contents of DX into segment register DS In each case, the MOV mnemonic is translated directly into one of the opcodes 88-8C, 8E, A0-A3, B0-BF, C6 or C7 by an assembler, and the programmer normally does not have to know or remember which. Transforming assembly language into machine code is the job of an assembler, and the reverse can at least partially be achieved by a disassembler. Unlike high-level languages, there is a one-to-one correspondence between many simple assembly statements and machine language instructions. However, in some cases, an assembler may provide pseudoinstructions (essentially macros) which expand into several machine language instructions to provide commonly needed functionality. For example, for a machine that lacks a "branch if greater or equal" instruction, an assembler may provide a pseudoinstruction that expands to the machine's "set if less than" and "branch if zero (on the result of the set instruction)". Most full-featured assemblers also provide a rich macro language (discussed below) which is used by vendors and programmers to generate more complex code and data sequences. Since the information about pseudoinstructions and macros defined in the assembler environment is not present in the object program, a disassembler cannot reconstruct the macro and pseudoinstruction invocations but can only disassemble the actual machine instructions that the assembler generated from those abstract assembly-language entities. Likewise, since comments in the assembly language source file are ignored by the assembler and have no effect on the object code it generates, a disassembler is always completely unable to recover source comments. Each computer architecture has its own machine language. Computers differ in the number and type of operations they support, in the different sizes and numbers of registers, and in the representations of data in storage. While most general-purpose computers are able to carry out essentially the same functionality, the ways they do so differ; the corresponding assembly languages reflect these differences. Multiple sets of mnemonics or assembly-language syntax may exist for a single instruction set, typically instantiated in different assembler programs. In these cases, the most popular one is usually that supplied by the CPU manufacturer and used in its documentation. Two examples of CPUs that have two different sets of mnemonics are the Intel 8080 family and the Intel 8086/8088. Because Intel claimed copyright on its assembly language mnemonics (on each page of their documentation published in the 1970s and early 1980s, at least), some companies that independently produced CPUs compatible with Intel instruction sets invented their own mnemonics. The Zilog Z80 CPU, an enhancement of the Intel 8080A, supports all the 8080A instructions plus many more; Zilog invented an entirely new assembly language, not only for the new instructions but also for all of the 8080A instructions. For example, where Intel uses the mnemonics MOV, MVI, LDA, STA, LXI, LDAX, STAX, LHLD, and SHLD for various data transfer instructions, the Z80 assembly language uses the mnemonic LD for all of them. A similar case is the NEC V20 and V30 CPUs, enhanced copies of the Intel 8086 and 8088, respectively. Like Zilog with the Z80, NEC invented new mnemonics for all of the 8086 and 8088 instructions, to avoid accusations of infringement of Intel's copyright. (It is questionable whether such copyrights can be valid, and later CPU companies such as AMD and Cyrix republished Intel's x86/IA-32 instruction mnemonics exactly with neither permission nor legal penalty.) It is doubtful whether in practice many people who programmed the V20 and V30 actually wrote in NEC's assembly language rather than Intel's; since any two assembly languages for the same instruction set architecture are isomorphic (somewhat like English and Pig Latin), there is no requirement to use a manufacturer's own published assembly language with that manufacturer's products. Language design Basic elements There is a large degree of diversity in the way the authors of assemblers categorize statements and in the nomenclature that they use. In particular, some describe anything other than a machine mnemonic or extended mnemonic as a pseudo-operation (pseudo-op). A typical assembly language consists of 3 types of instruction statements that are used to define program operations: Opcode mnemonics Data definitions Assembly directives Opcode mnemonics and extended mnemonics Instructions (statements) in assembly language are generally very simple, unlike those in high-level languages. Generally, a mnemonic is a symbolic name for a single executable machine language instruction (an opcode), and there is at least one opcode mnemonic defined for each machine language instruction. Each instruction typically consists of an operation or opcode plus zero or more operands. Most instructions refer to a single value or a pair of values. Operands can be immediate (value coded in the instruction itself), registers specified in the instruction or implied, or the addresses of data located elsewhere in storage. This is determined by the underlying processor architecture: the assembler merely reflects how this architecture works. Extended mnemonics are often used to specify a combination of an opcode with a specific operand, e.g., the System/360 assemblers use as an extended mnemonic for with a mask of 15 and ("NO OPeration" – do nothing for one step) for with a mask of 0. Extended mnemonics are often used to support specialized uses of instructions, often for purposes not obvious from the instruction name. For example, many CPU's do not have an explicit NOP instruction, but do have instructions that can be used for the purpose. In 8086 CPUs the instruction is used for , with being a pseudo-opcode to encode the instruction . Some disassemblers recognize this and will decode the instruction as . Similarly, IBM assemblers for System/360 and System/370 use the extended mnemonics and for and with zero masks. For the SPARC architecture, these are known as synthetic instructions. Some assemblers also support simple built-in macro-instructions that generate two or more machine instructions. For instance, with some Z80 assemblers the instruction is recognized to generate followed by . These are sometimes known as pseudo-opcodes. Mnemonics are arbitrary symbols; in 1985 the IEEE published Standard 694 for a uniform set of mnemonics to be used by all assemblers. The standard has since been withdrawn. Data directives There are instructions used to define data elements to hold data and variables. They define the type of data, the length and the alignment of data. These instructions can also define whether the data is available to outside programs (programs assembled separately) or only to the program in which the data section is defined. Some assemblers classify these as pseudo-ops. Assembly directives Assembly directives, also called pseudo-opcodes, pseudo-operations or pseudo-ops, are commands given to an assembler "directing it to perform operations other than assembling instructions". Directives affect how the assembler operates and "may affect the object code, the symbol table, the listing file, and the values of internal assembler parameters". Sometimes the term pseudo-opcode is reserved for directives that generate object code, such as those that generate data. The names of pseudo-ops often start with a dot to distinguish them from machine instructions. Pseudo-ops can make the assembly of the program dependent on parameters input by a programmer, so that one program can be assembled in different ways, perhaps for different applications. Or, a pseudo-op can be used to manipulate presentation of a program to make it easier to read and maintain. Another common use of pseudo-ops is to reserve storage areas for run-time data and optionally initialize their contents to known values. Symbolic assemblers let programmers associate arbitrary names (labels or symbols) with memory locations and various constants. Usually, every constant and variable is given a name so instructions can reference those locations by name, thus promoting self-documenting code. In executable code, the name of each subroutine is associated with its entry point, so any calls to a subroutine can use its name. Inside subroutines, GOTO destinations are given labels. Some assemblers support local symbols which are often lexically distinct from normal symbols (e.g., the use of "10$" as a GOTO destination). Some assemblers, such as NASM, provide flexible symbol management, letting programmers manage different namespaces, automatically calculate offsets within data structures, and assign labels that refer to literal values or the result of simple computations performed by the assembler. Labels can also be used to initialize constants and variables with relocatable addresses. Assembly languages, like most other computer languages, allow comments to be added to program source code that will be ignored during assembly. Judicious commenting is essential in assembly language programs, as the meaning and purpose of a sequence of binary machine instructions can be difficult to determine. The "raw" (uncommented) assembly language generated by compilers or disassemblers is quite difficult to read when changes must be made. Macros Many assemblers support predefined macros, and others support programmer-defined (and repeatedly re-definable) macros involving sequences of text lines in which variables and constants are embedded. The macro definition is most commonly a mixture of assembler statements, e.g., directives, symbolic machine instructions, and templates for assembler statements. This sequence of text lines may include opcodes or directives. Once a macro has been defined its name may be used in place of a mnemonic. When the assembler processes such a statement, it replaces the statement with the text lines associated with that macro, then processes them as if they existed in the source code file (including, in some assemblers, expansion of any macros existing in the replacement text). Macros in this sense date to IBM autocoders of the 1950s. Macro assemblers typically have directives to, e.g., define macros, define variables, set variables to the result of an arithmetic, logical or string expression, iterate, conditionally generate code. Some of those directives may be restricted to use within a macro definition, e.g., MEXIT in HLASM, while others may be permitted within open code (outside macro definitions), e.g., AIF and COPY in HLASM. In assembly language, the term "macro" represents a more comprehensive concept than it does in some other contexts, such as the pre-processor in the C programming language, where its #define directive typically is used to create short single line macros. Assembler macro instructions, like macros in PL/I and some other languages, can be lengthy "programs" by themselves, executed by interpretation by the assembler during assembly. Since macros can have 'short' names but expand to several or indeed many lines of code, they can be used to make assembly language programs appear to be far shorter, requiring fewer lines of source code, as with higher level languages. They can also be used to add higher levels of structure to assembly programs, optionally introduce embedded debugging code via parameters and other similar features. Macro assemblers often allow macros to take parameters. Some assemblers include quite sophisticated macro languages, incorporating such high-level language elements as optional parameters, symbolic variables, conditionals, string manipulation, and arithmetic operations, all usable during the execution of a given macro, and allowing macros to save context or exchange information. Thus a macro might generate numerous assembly language instructions or data definitions, based on the macro arguments. This could be used to generate record-style data structures or "unrolled" loops, for example, or could generate entire algorithms based on complex parameters. For instance, a "sort" macro could accept the specification of a complex sort key and generate code crafted for that specific key, not needing the run-time tests that would be required for a general procedure interpreting the specification. An organization using assembly language that has been heavily extended using such a macro suite can be considered to be working in a higher-level language since such programmers are not working with a computer's lowest-level conceptual elements. Underlining this point, macros were used to implement an early virtual machine in SNOBOL4 (1967), which was written in the SNOBOL Implementation Language (SIL), an assembly language for a virtual machine. The target machine would translate this to its native code using a macro assembler. This allowed a high degree of portability for the time. Macros were used to customize large scale software systems for specific customers in the mainframe era and were also used by customer personnel to satisfy their employers' needs by making specific versions of manufacturer operating systems. This was done, for example, by systems programmers working with IBM's Conversational Monitor System / Virtual Machine (VM/CMS) and with IBM's "real time transaction processing" add-ons, Customer Information Control System CICS, and ACP/TPF, the airline/financial system that began in the 1970s and still runs many large computer reservation systems (CRS) and credit card systems today. It is also possible to use solely the macro processing abilities of an assembler to generate code written in completely different languages, for example, to generate a version of a program in COBOL using a pure macro assembler program containing lines of COBOL code inside assembly time operators instructing the assembler to generate arbitrary code. IBM OS/360 uses macros to perform system generation. The user specifies options by coding a series of assembler macros. Assembling these macros generates a job stream to build the system, including job control language and utility control statements. This is because, as was realized in the 1960s, the concept of "macro processing" is independent of the concept of "assembly", the former being in modern terms more word processing, text processing, than generating object code. The concept of macro processing appeared, and appears, in the C programming language, which supports "preprocessor instructions" to set variables, and make conditional tests on their values. Unlike certain previous macro processors inside assemblers, the C preprocessor is not Turing-complete because it lacks the ability to either loop or "go to", the latter allowing programs to loop. Despite the power of macro processing, it fell into disuse in many high level languages (major exceptions being C, C++ and PL/I) while remaining a perennial for assemblers. Macro parameter substitution is strictly by name: at macro processing time, the value of a parameter is textually substituted for its name. The most famous class of bugs resulting was the use of a parameter that itself was an expression and not a simple name when the macro writer expected a name. In the macro: foo: macro a load ab the intention was that the caller would provide the name of a variable, and the "global" variable or constant b would be used to multiply "a". If foo is called with the parameter a-c, the macro expansion of load a-cb occurs. To avoid any possible ambiguity, users of macro processors can parenthesize formal parameters inside macro definitions, or callers can parenthesize the input parameters. Support for structured programming Packages of macros have been written providing structured programming elements to encode execution flow. The earliest example of this approach was in the Concept-14 macro set, originally proposed by Harlan Mills (March 1970), and implemented by Marvin Kessler at IBM's Federal Systems Division, which provided IF/ELSE/ENDIF and similar control flow blocks for OS/360 assembler programs. This was a way to reduce or eliminate the use of GOTO operations in assembly code, one of the main factors causing spaghetti code in assembly language. This approach was widely accepted in the early 1980s (the latter days of large-scale assembly language use). IBM's High Level Assembler Toolkit includes such a macro package. A curious design was A-Natural, a "stream-oriented" assembler for 8080/Z80, processors from Whitesmiths Ltd. (developers of the Unix-like Idris operating system, and what was reported to be the first commercial C compiler). The language was classified as an assembler because it worked with raw machine elements such as opcodes, registers, and memory references; but it incorporated an expression syntax to indicate execution order. Parentheses and other special symbols, along with block-oriented structured programming constructs, controlled the sequence of the generated instructions. A-natural was built as the object language of a C compiler, rather than for hand-coding, but its logical syntax won some fans. There has been little apparent demand for more sophisticated assemblers since the decline of large-scale assembly language development. In spite of that, they are still being developed and applied in cases where resource constraints or peculiarities in the target system's architecture prevent the effective use of higher-level languages. Assemblers with a strong macro engine allow structured programming via macros, such as the switch macro provided with the Masm32 package (this code is a complete program): include \masm32\include\masm32rt.inc ; use the Masm32 library .code demomain: REPEAT 20 switch rv(nrandom, 9) ; generate a number between 0 and 8 mov ecx, 7 case 0 print "case 0" case ecx ; in contrast to most other programming languages, print "case 7" ; the Masm32 switch allows "variable cases" case 1 .. 3 .if eax==1 print "case 1" .elseif eax==2 print "case 2" .else print "cases 1 to 3: other" .endif case 4, 6, 8 print "cases 4, 6 or 8" default mov ebx, 19 ; print 20 stars .Repeat print "*" dec ebx .Until Sign? ; loop until the sign flag is set endsw print chr$(13, 10) ENDM exit end demomain Use of assembly language Historical perspective Assembly languages were not available at the time when the stored-program computer was introduced. Kathleen Booth "is credited with inventing assembly language" based on theoretical work she began in 1947, while working on the ARC2 at Birkbeck, University of London following consultation by Andrew Booth (later her husband) with mathematician John von Neumann and physicist Herman Goldstine at the Institute for Advanced Study. In late 1948, the Electronic Delay Storage Automatic Calculator (EDSAC) had an assembler (named "initial orders") integrated into its bootstrap program. It used one-letter mnemonics developed by David Wheeler, who is credited by the IEEE Computer Society as the creator of the first "assembler". Reports on the EDSAC introduced the term "assembly" for the process of combining fields into an instruction word. SOAP (Symbolic Optimal Assembly Program) was an assembly language for the IBM 650 computer written by Stan Poley in 1955. Assembly languages eliminate much of the error-prone, tedious, and time-consuming first-generation programming needed with the earliest computers, freeing programmers from tedium such as remembering numeric codes and calculating addresses. They were once widely used for all sorts of programming. However, by the late 1950s, their use had largely been supplanted by higher-level languages, in the search for improved programming productivity. Today, assembly language is still used for direct hardware manipulation, access to specialized processor instructions, or to address critical performance issues. Typical uses are device drivers, low-level embedded systems, and real-time systems (see ). Numerous programs have been written entirely in assembly language. The Burroughs MCP (1961) was the first computer for which an operating system was not developed entirely in assembly language; it was written in Executive Systems Problem Oriented Language (ESPOL), an Algol dialect. Many commercial applications were written in assembly language as well, including a large amount of the IBM mainframe software written by large corporations. COBOL, FORTRAN and some PL/I eventually displaced much of this work, although a number of large organizations retained assembly-language application infrastructures well into the 1990s. Assembly language has long been the primary development language for 8-bit home computers such Atari 8-bit family, Apple II, MSX, ZX Spectrum, and Commodore 64. Interpreted BASIC dialects on these systems offer insufficient execution speed and insufficient facilities to take full advantage of the available hardware. These systems have severe resource constraints, idiosyncratic memory and display architectures, and provide limited system services. There are also few high-level language compilers suitable for microcomputer use. Similarly, assembly language is the default choice for 8-bit consoles such as the Atari 2600 and Nintendo Entertainment System. Key software for IBM PC compatibles was written in assembly language, such as MS-DOS, Turbo Pascal, and the Lotus 1-2-3 spreadsheet. As computer speed grew exponentially, assembly language became a tool for speeding up parts of programs, such as the rendering of Doom, rather than a dominant development language. In the 1990s, assembly language was used to get performance out of systems such as the Sega Saturn and as the primary language for arcade hardware based on the TMS34010 integrated CPU/GPU such as Mortal Kombat and NBA Jam. Current usage There has been debate over the usefulness and performance of assembly language relative to high-level languages. Although assembly language has specific niche uses where it is important (see below), there are other tools for optimization. , the TIOBE index of programming language popularity ranks assembly language at 11, ahead of Visual Basic, for example. Assembler can be used to optimize for speed or optimize for size. In the case of speed optimization, modern optimizing compilers are claimed to render high-level languages into code that can run as fast as hand-written assembly, despite the counter-examples that can be found. The complexity of modern processors and memory sub-systems makes effective optimization increasingly difficult for compilers, as well as for assembly programmers. Moreover, increasing processor performance has meant that most CPUs sit idle most of the time, with delays caused by predictable bottlenecks such as cache misses, I/O operations and paging. This has made raw code execution speed a non-issue for many programmers. There are some situations in which developers might choose to use assembly language: Writing code for systems with that have limited high-level language options such as the Atari 2600, Commodore 64, and graphing calculators. Programs for these computers of the 1970s and 1980s are often written in the context of demoscene or retrogaming subcultures. Code that must interact directly with the hardware, for example in device drivers and interrupt handlers. In an embedded processor or DSP, high-repetition interrupts require the shortest number of cycles per interrupt, such as an interrupt that occurs 1000 or 10000 times a second. Programs that need to use processor-specific instructions not implemented in a compiler. A common example is the bitwise rotation instruction at the core of many encryption algorithms, as well as querying the parity of a byte or the 4-bit carry of an addition. A stand-alone executable of compact size is required that must execute without recourse to the run-time components or libraries associated with a high-level language. Examples have included firmware for telephones, automobile fuel and ignition systems, air-conditioning control systems, security systems, and sensors. Programs with performance-sensitive inner loops, where assembly language provides optimization opportunities that are difficult to achieve in a high-level language. For example, linear algebra with BLAS or discrete cosine transformation (e.g. SIMD assembly version from x264). Programs that create vectorized functions for programs in higher-level languages such as C. In the higher-level language this is sometimes aided by compiler intrinsic functions which map directly to SIMD mnemonics, but nevertheless result in a one-to-one assembly conversion specific for the given vector processor. Real-time programs such as simulations, flight navigation systems, and medical equipment. For example, in a fly-by-wire system, telemetry must be interpreted and acted upon within strict time constraints. Such systems must eliminate sources of unpredictable delays, which may be created by (some) interpreted languages, automatic garbage collection, paging operations, or preemptive multitasking. However, some higher-level languages incorporate run-time components and operating system interfaces that can introduce such delays. Choosing assembly or lower-level languages for such systems gives programmers greater visibility and control over processing details. Cryptographic algorithms that must always take strictly the same time to execute, preventing timing attacks. Video encoders and decoders such as rav1e (an encoder for AV1) and dav1d (the reference decoder for AV1) contain assembly to leverage AVX2 and ARM Neon instructions when available. Modify and extend legacy code written for IBM mainframe computers. Situations where complete control over the environment is required, in extremely high-security situations where nothing can be taken for granted. Computer viruses, bootloaders, certain device drivers, or other items very close to the hardware or low-level operating system. Instruction set simulators for monitoring, tracing and debugging where additional overhead is kept to a minimum. Situations where no high-level language exists, on a new or specialized processor for which no cross compiler is available. Reverse engineering and modifying program files such as: existing binaries that may or may not have originally been written in a high-level language, for example when trying to recreate programs for which source code is not available or has been lost, or cracking copy protection of proprietary software. Video games (also termed ROM hacking), which is possible via several methods. The most widely employed method is altering program code at the assembly language level. Assembly language is still taught in most computer science and electronic engineering programs. Although few programmers today regularly work with assembly language as a tool, the underlying concepts remain important. Such fundamental topics as binary arithmetic, memory allocation, stack processing, character set encoding, interrupt processing, and compiler design would be hard to study in detail without a grasp of how a computer operates at the hardware level. Since a computer's behavior is fundamentally defined by its instruction set, the logical way to learn such concepts is to study an assembly language. Most modern computers have similar instruction sets. Therefore, studying a single assembly language is sufficient to learn: I) the basic concepts; II) to recognize situations where the use of assembly language might be appropriate; and III) to see how efficient executable code can be created from high-level languages. Typical applications Assembly language is typically used in a system's boot code, the low-level code that initializes and tests the system hardware prior to booting the operating system and is often stored in ROM. (BIOS on IBM-compatible PC systems and CP/M is an example.) Assembly language is often used for low-level code, for instance for operating system kernels, which cannot rely on the availability of pre-existing system calls and must indeed implement them for the particular processor architecture on which the system will be running. Some compilers translate high-level languages into assembly first before fully compiling, allowing the assembly code to be viewed for debugging and optimization purposes. Some compilers for relatively low-level languages, such as Pascal or C, allow the programmer to embed assembly language directly in the source code (so called inline assembly). Programs using such facilities can then construct abstractions using different assembly language on each hardware platform. The system's portable code can then use these processor-specific components through a uniform interface. Assembly language is useful in reverse engineering. Many programs are distributed only in machine code form which is straightforward to translate into assembly language by a disassembler, but more difficult to translate into a higher-level language through a decompiler. Tools such as the Interactive Disassembler make extensive use of disassembly for such a purpose. This technique is used by hackers to crack commercial software, and competitors to produce software with similar results from competing companies. Assembly language is used to enhance speed of execution, especially in early personal computers with limited processing power and RAM. Assemblers can be used to generate blocks of data, with no high-level language overhead, from formatted and commented source code, to be used by other code. See also Compiler Comparison of assemblers Disassembler Hexadecimal Instruction set architecture Little man computer – an educational computer model with a base-10 assembly language Nibble Typed assembly language Notes References Further reading (2+xiv+270+6 pages) ("An online book full of helpful ASM info, tutorials and code examples" by the ASM Community, archived at the internet archive.) External links Unix Assembly Language Programming Linux Assembly PPR: Learning Assembly Language NASM – The Netwide Assembler BSD-licensed x86 assembler Assembly Language Programming Examples Authoring Windows Applications In Assembly Language Assembly Optimization Tips by Mark Larson Assembly language Computer-related introductions in 1949 Embedded systems Low-level programming languages Programming language implementation Programming languages created in 1949	20
Amber is fossilized tree resin that has been appreciated for its color and natural beauty since Neolithic times. Much valued from antiquity to the present as a gemstone, amber is made into a variety of decorative objects. Amber is used in jewelry and has been used as a healing agent in folk medicine. There are five classes of amber, defined on the basis of their chemical constituents. Because it originates as a soft, sticky tree resin, amber sometimes contains animal and plant material as inclusions. Amber occurring in coal seams is also called resinite, and the term ambrite is applied to that found specifically within New Zealand coal seams. Etymology The English word amber derives from Arabic (ultimately from Middle Persian ambar) via Middle Latin ambar and Middle French ambre. The word referred to what is now known as ambergris (ambre gris or "grey amber"), a solid waxy substance derived from the sperm whale. The word, in its sense of "ambergris," was adopted in Middle English in the 14th century. In the Romance languages, the sense of the word was extended to Baltic amber (fossil resin) from as early as the late 13th century. At first called white or yellow amber (ambre jaune), this meaning was adopted in English by the early 15th century. As the use of ambergris waned, this became the main sense of the word. The two substances ("yellow amber" and "grey amber") conceivably became associated or confused because they both were found washed up on beaches. Ambergris is less dense than water and floats, whereas amber is too dense to float, though less dense than stone. The classical names for amber, Latin electrum and Ancient Greek (ēlektron), are connected to a term ἠλέκτωρ (ēlektōr) meaning "beaming Sun". According to myth, when Phaëton son of Helios (the Sun) was killed, his mourning sisters became poplar trees, and their tears became elektron, amber. The word elektron gave rise to the words electric, electricity, and their relatives because of amber's ability to bear a charge of static electricity. Pliny the Elder says that the German name of amber was glæsum, "for which reason the Romans, when Germanicus commanded the fleet in those parts, gave to one of these islands the name of Glæsaria, which by the barbarians was known as Austeravia". This is confirmed by the recorded Old High German word glas and by the Old English word glær for "amber" (compare glass). In Middle Low German, amber was known as berne-, barn-, börnstēn (with etymological roots related to "burn" and to "stone"). The Low German term became dominant also in High German by the 18th century, thus modern German Bernstein besides Dutch barnsteen. In the Baltic languages, the Lithuanian term for amber is gintaras and the Latvian dzintars. These words, and the Slavic jantar and Hungarian gyanta ('resin'), are thought to originate from Phoenician jainitar ("sea-resin"). History Theophrastus discussed amber in the 4th century BCE, as did Pytheas (), whose work "On the Ocean" is lost, but was referenced by Pliny, according to whose Natural History: Earlier Pliny says that Pytheas refers to a large island—three days' sail from the Scythian coast and called Balcia by Xenophon of Lampsacus (author of a fanciful travel book in Greek)—as Basilia—a name generally equated with Abalus. Given the presence of amber, the island could have been Heligoland, Zealand, the shores of Gdańsk Bay, the Sambia Peninsula or the Curonian Lagoon, which were historically the richest sources of amber in northern Europe. It is assumed that there were well-established trade routes for amber connecting the Baltic with the Mediterranean (known as the "Amber Road"). Pliny states explicitly that the Germans exported amber to Pannonia, from where the Veneti distributed it onwards. The ancient Italic peoples of southern Italy used to work amber; the National Archaeological Museum of Siritide (Museo Archeologico Nazionale della Siritide) at Policoro in the province of Matera (Basilicata) displays important surviving examples. It has been suggested that amber used in antiquity, as at Mycenae and in the prehistory of the Mediterranean, came from deposits in Sicily. Pliny also cites the opinion of Nicias ( 470–413 BCE), according to whom amber Besides the fanciful explanations according to which amber is "produced by the Sun", Pliny cites opinions that are well aware of its origin in tree resin, citing the native Latin name of succinum (sūcinum, from sucus "juice"). In Book 37, section XI of Natural History, Pliny wrote: He also states that amber is also found in Egypt and India, and he even refers to the electrostatic properties of amber, by saying that "in Syria the women make the whorls of their spindles of this substance, and give it the name of harpax [from ἁρπάζω, "to drag"] from the circumstance that it attracts leaves towards it, chaff, and the light fringe of tissues". Amber has a long history of use in China, with the first written record from 200 BCE. Early in the 19th century, the first reports of amber found in North America came from discoveries in New Jersey along Crosswicks Creek near Trenton, at Camden, and near Woodbury. Composition and formation Amber is heterogeneous in composition, but consists of several resinous more or less soluble in alcohol, ether and chloroform, associated with an insoluble bituminous substance. Amber is a macromolecule by free radical polymerization of several precursors in the labdane family, e.g. communic acid, cummunol, and biformene. These labdanes are diterpenes (C20H32) and trienes, equipping the organic skeleton with three alkene groups for polymerization. As amber matures over the years, more polymerization takes place as well as isomerization reactions, crosslinking and cyclization. Most amber has a hardness between 2.0 and 2.5 on the Mohs scale, a refractive index of 1.5–1.6, a specific gravity between 1.06 and 1.10, and a melting point of 250–300 °C. Heated above , amber decomposes, yielding an oil of amber, and leaves a black residue which is known as "amber colophony", or "amber pitch"; when dissolved in oil of turpentine or in linseed oil this forms "amber varnish" or "amber lac". Molecular polymerization, resulting from high pressures and temperatures produced by overlying sediment, transforms the resin first into copal. Sustained heat and pressure drives off terpenes and results in the formation of amber. For this to happen, the resin must be resistant to decay. Many trees produce resin, but in the majority of cases this deposit is broken down by physical and biological processes. Exposure to sunlight, rain, microorganisms, and extreme temperatures tends to disintegrate the resin. For the resin to survive long enough to become amber, it must be resistant to such forces or be produced under conditions that exclude them. Fossil resins from Europe fall into two categories, the Baltic ambers and another that resembles the Agathis group. Fossil resins from the Americas and Africa are closely related to the modern genus Hymenaea, while Baltic ambers are thought to be fossil resins from plants of the family Sciadopityaceae that once lived in north Europe. The abnormal development of resin in living trees (succinosis) can result in the formation of amber. Impurities are quite often present, especially when the resin has dropped onto the ground, so the material may be useless except for varnish-making. Such impure amber is called firniss. Such inclusion of other substances can cause the amber to have an unexpected color. Pyrites may give a bluish color. Bony amber owes its cloudy opacity to numerous tiny bubbles inside the resin. However, so-called black amber is really a kind of jet. In darkly clouded and even opaque amber, inclusions can be imaged using high-energy, high-contrast, high-resolution X-rays. Extraction and processing Distribution and mining Amber is globally distributed, mainly in rocks of Cretaceous age or younger. Historically, the coast west of Königsberg in Prussia was the world's leading source of amber. The first mentions of amber deposits there date back to the 12th century. Juodkrantė in Lithuania was established in the mid. 19 century as a mining town of amber. About 90% of the world's extractable amber is still located in that area, which was transferred to the Russian Soviet Federative Socialist Republic of the USSR in 1946, becoming the Kaliningrad Oblast. Pieces of amber torn from the seafloor are cast up by the waves and collected by hand, dredging, or diving. Elsewhere, amber is mined, both in open works and underground galleries. Then nodules of blue earth have to be removed and an opaque crust must be cleaned off, which can be done in revolving barrels containing sand and water. Erosion removes this crust from sea-worn amber. Dominican amber is mined through bell pitting, which is dangerous because of the risk of tunnel collapse. An important source of amber is Kachin State in northern Myanmar, which has been a major source of amber in China for at least 1,800 years. Contemporary mining of this deposit has attracted attention for unsafe working conditions and its role in funding internal conflict in the country. Amber from the Rivne Oblast of Ukraine, referred to as Rivne amber, is mined illegally by organised crime groups, who deforest the surrounding areas and pump water into the sediments to extract the amber, causing severe environmental deterioration. Treatment The Vienna amber factories, which use pale amber to manufacture pipes and other smoking tools, turn it on a lathe and polish it with whitening and water or with rotten stone and oil. The final luster is given by polishing with flannel. When gradually heated in an oil bath, amber "becomes soft and flexible. Two pieces of amber may be united by smearing the surfaces with linseed oil, heating them, and then pressing them together while hot. Cloudy amber may be clarified in an oil bath, as the oil fills the numerous pores that cause the turbidity. Small fragments, formerly thrown away or used only for varnish are now used on a large scale in the formation of "ambroid" or "pressed amber". The pieces are carefully heated with exclusion of air and then compressed into a uniform mass by intense hydraulic pressure, the softened amber being forced through holes in a metal plate. The product is extensively used for the production of cheap jewelry and articles for smoking. This pressed amber yields brilliant interference colors in polarized light." Amber has often been imitated by other resins like copal and kauri gum, as well as by celluloid and even glass. Baltic amber is sometimes colored artificially but also called "true amber". Appearance Amber occurs in a range of different colors. As well as the usual yellow-orange-brown that is associated with the color "amber", amber can range from a whitish color through a pale lemon yellow, to brown and almost black. Other uncommon colors include red amber (sometimes known as "cherry amber"), green amber, and even blue amber, which is rare and highly sought after. Yellow amber is a hard fossil resin from evergreen trees, and despite the name it can be translucent, yellow, orange, or brown colored. Known to the Iranians by the Pahlavi compound word kah-ruba (from kah "straw" plus rubay "attract, snatch", referring to its electrical properties), which entered Arabic as kahraba' or kahraba (which later became the Arabic word for electricity, كهرباء kahrabā), it too was called amber in Europe (Old French and Middle English ambre). Found along the southern shore of the Baltic Sea, yellow amber reached the Middle East and western Europe via trade. Its coastal acquisition may have been one reason yellow amber came to be designated by the same term as ambergris. Moreover, like ambergris, the resin could be burned as an incense. The resin's most popular use was, however, for ornamentation—easily cut and polished, it could be transformed into beautiful jewelry. Much of the most highly prized amber is transparent, in contrast to the very common cloudy amber and opaque amber. Opaque amber contains numerous minute bubbles. This kind of amber is known as "bony amber". Although all Dominican amber is fluorescent, the rarest Dominican amber is blue amber. It turns blue in natural sunlight and any other partially or wholly ultraviolet light source. In long-wave UV light it has a very strong reflection, almost white. Only about is found per year, which makes it valuable and expensive. Sometimes amber retains the form of drops and stalactites, just as it exuded from the ducts and receptacles of the injured trees. It is thought that, in addition to exuding onto the surface of the tree, amber resin also originally flowed into hollow cavities or cracks within trees, thereby leading to the development of large lumps of amber of irregular form. Classification Amber can be classified into several forms. Most fundamentally, there are two types of plant resin with the potential for fossilization. Terpenoids, produced by conifers and angiosperms, consist of ring structures formed of isoprene (C5H8) units. Phenolic resins are today only produced by angiosperms, and tend to serve functional uses. The extinct medullosans produced a third type of resin, which is often found as amber within their veins. The composition of resins is highly variable; each species produces a unique blend of chemicals which can be identified by the use of pyrolysis–gas chromatography–mass spectrometry. The overall chemical and structural composition is used to divide ambers into five classes. There is also a separate classification of amber gemstones, according to the way of production. Class I This class is by far the most abundant. It comprises labdatriene carboxylic acids such as communic or ozic acids. It is further split into three sub-classes. Classes Ia and Ib utilize regular labdanoid diterpenes (e.g. communic acid, communol, biformenes), while Ic uses enantio labdanoids (ozic acid, ozol, enantio biformenes). Class Ia includes Succinite (= 'normal' Baltic amber) and Glessite. They have a communic acid base, and they also include much succinic acid. Baltic amber yields on dry distillation succinic acid, the proportion varying from about 3% to 8%, and being greatest in the pale opaque or bony varieties. The aromatic and irritating fumes emitted by burning amber are mainly from this acid. Baltic amber is distinguished by its yield of succinic acid, hence the name succinite. Succinite has a hardness between 2 and 3, which is greater than many other fossil resins. Its specific gravity varies from 1.05 to 1.10. It can be distinguished from other ambers via infrared spectroscopy through a specific carbonyl absorption peak. Infrared spectroscopy can detect the relative age of an amber sample. Succinic acid may not be an original component of amber but rather a degradation product of abietic acid. Class Ib ambers are based on communic acid; however, they lack succinic acid. Class Ic is mainly based on enantio-labdatrienonic acids, such as ozic and zanzibaric acids. Its most familiar representative is Dominican amber,. which is mostly transparent and often contains a higher number of fossil inclusions. This has enabled the detailed reconstruction of the ecosystem of a long-vanished tropical forest. Resin from the extinct species Hymenaea protera is the source of Dominican amber and probably of most amber found in the tropics. It is not "succinite" but "retinite". Class II These ambers are formed from resins with a sesquiterpenoid base, such as cadinene. Class III These ambers are polystyrenes. Class IV Class IV is something of a catch-all: its ambers are not polymerized, but mainly consist of cedrene-based sesquiterpenoids. Class V Class V resins are considered to be produced by a pine or pine relative. They comprise a mixture of diterpinoid resins and n-alkyl compounds. Their main variety is Highgate copalite. Geological record The oldest amber recovered dates to the late Carboniferous period (). Its chemical composition makes it difficult to match the amber to its producers – it is most similar to the resins produced by flowering plants; however, there are no flowering plant fossils known from before the Cretaceous, and they were not common until the Late Cretaceous. Amber becomes abundant long after the Carboniferous, in the Early Cretaceous, , when it is found in association with insects. The oldest amber with arthropod inclusions comes from the Late Triassic (late Carnian 230 Ma) of Italy, where four microscopic (0.2–0.1 mm) mites, Triasacarus, Ampezzoa, Minyacarus and Cheirolepidoptus, and a poorly preserved nematoceran fly were found in millimetre-sized droplets of amber. The oldest amber with significant numbers of arthropod inclusions comes from Lebanon. This amber, referred to as Lebanese amber, is roughly 125–135 million years old, is considered of high scientific value, providing evidence of some of the oldest sampled ecosystems. In Lebanon, more than 450 outcrops of Lower Cretaceous amber were discovered by Dany Azar, a Lebanese paleontologist and entomologist. Among these outcrops, 20 have yielded biological inclusions comprising the oldest representatives of several recent families of terrestrial arthropods. Even older Jurassic amber has been found recently in Lebanon as well. Many remarkable insects and spiders were recently discovered in the amber of Jordan including the oldest zorapterans, clerid beetles, umenocoleid roaches, and achiliid planthoppers. Burmese amber from the Hukawng Valley in northern Myanmar is the only commercially exploited Cretaceous amber. Uranium–lead dating of zircon crystals associated with the deposit have given an estimated depositional age of approximately 99 million years ago. Over 1,300 species have been described from the amber, with over 300 in 2019 alone. Baltic amber is found as irregular nodules in marine glauconitic sand, known as blue earth, occurring in Upper Eocene strata of Sambia in Prussia. It appears to have been partly derived from older Eocene deposits and it occurs also as a derivative phase in later formations, such as glacial drift. Relics of an abundant flora occur as inclusions trapped within the amber while the resin was yet fresh, suggesting relations with the flora of eastern Asia and the southern part of North America. Heinrich Göppert named the common amber-yielding pine of the Baltic forests Pinites succiniter, but as the wood does not seem to differ from that of the existing genus it has been also called Pinus succinifera. It is improbable that the production of amber was limited to a single species; and indeed a large number of conifers belonging to different genera are represented in the amber-flora. Paleontological significance Amber is a unique preservational mode, preserving otherwise unfossilizable parts of organisms; as such it is helpful in the reconstruction of ecosystems as well as organisms; the chemical composition of the resin, however, is of limited utility in reconstructing the phylogenetic affinity of the resin producer. Amber sometimes contains animals or plant matter that became caught in the resin as it was secreted. Insects, spiders and even their webs, annelids, frogs, crustaceans, bacteria and amoebae, marine microfossils, wood, flowers and fruit, hair, feathers and other small organisms have been recovered in Cretaceous ambers (deposited c. ). The preservation of prehistoric organisms in amber forms a key plot point in Michael Crichton's 1990 novel Jurassic Park and the 1993 movie adaptation by Steven Spielberg. In the story, scientists are able to extract the preserved blood of dinosaurs from prehistoric mosquitoes trapped in amber, from which they genetically clone living dinosaurs. Scientifically this is as yet impossible, since no amber with fossilized mosquitoes has ever yielded preserved blood. Amber is, however, conducive to preserving DNA, since it dehydrates and thus stabilizes organisms trapped inside. One projection in 1999 estimated that DNA trapped in amber could last up to 100 million years, far beyond most estimates of around 1 million years in the most ideal conditions, although a later 2013 study was unable to extract DNA from insects trapped in much more recent Holocene copal. In 1938, 12-year-old David Attenborough (brother of Richard who played John Hammond in Jurassic Park) was given a piece of amber containing prehistoric creatures from his adoptive sister; it would be the focus of his 2004 BBC documentary The Amber Time Machine. Use Amber has been used since prehistory (Solutrean) in the manufacture of jewelry and ornaments, and also in folk medicine. Jewelry Amber has been used as jewelry since the Stone Age, from 13,000 years ago. Amber ornaments have been found in Mycenaean tombs and elsewhere across Europe. To this day it is used in the manufacture of smoking and glassblowing mouthpieces. Amber's place in culture and tradition lends it a tourism value; Palanga Amber Museum is dedicated to the fossilized resin. Historical medicinal uses Amber has long been used in folk medicine for its purported healing properties. Amber and extracts were used from the time of Hippocrates in ancient Greece for a wide variety of treatments through the Middle Ages and up until the early twentieth century. Traditional Chinese medicine uses amber to "tranquilize the mind". Amber necklaces are a traditional European remedy for colic or teething pain with purported analgesic properties of succinic acid, although there is no evidence that this is an effective remedy or delivery method. The American Academy of Pediatrics and the FDA have warned strongly against their use, as they present both a choking and a strangulation hazard. Scent of amber and amber perfumery In ancient China, it was customary to burn amber during large festivities. If amber is heated under the right conditions, oil of amber is produced, and in past times this was combined carefully with nitric acid to create "artificial musk" – a resin with a peculiar musky odor. Although when burned, amber does give off a characteristic "pinewood" fragrance, modern products, such as perfume, do not normally use actual amber because fossilized amber produces very little scent. In perfumery, scents referred to as "amber" are often created and patented to emulate the opulent golden warmth of the fossil. The scent of amber was originally derived from emulating the scent of ambergris and/or the plant resin labdanum, but since sperm whales are endangered, the scent of amber is now largely derived from labdanum. The term "amber" is loosely used to describe a scent that is warm, musky, rich and honey-like, and also somewhat earthy. Benzoin is usually part of the recipe. Vanilla and cloves are sometimes used to enhance the aroma. "Amber" perfumes may be created using combinations of labdanum, benzoin resin, copal (a type of tree resin used in incense manufacture), vanilla, Dammara resin and/or synthetic materials. In Arab Muslim tradition, popular scents include amber, jasmine, musk and oud (agarwood). Imitation substances Young resins used as imitations: Kauri resin from Agathis australis trees in New Zealand. The copals (subfossil resins). The African and American (Colombia) copals from Leguminosae trees family (genus Hymenaea). Amber of the Dominican or Mexican type (Class I of fossil resins). Copals from Manilia (Indonesia) and from New Zealand from trees of the genus Agathis (family Araucariaceae) Other fossil resins: burmite in Burma, rumenite in Romania, and simetite in Sicily. Other natural resins — cellulose or chitin, etc. Plastics used as imitations: Stained glass (inorganic material) and other ceramic materials Celluloid Cellulose nitrate (first obtained in 1833) — a product of treatment of cellulose with nitration mixture. Acetylcellulose (not in the use at present) Galalith or "artificial horn" (condensation product of casein and formaldehyde), other trade names: Alladinite, Erinoid, Lactoid. Casein — a conjugated protein forming from the casein precursor – caseinogen. Resolane (phenolic resins or phenoplasts, not in the use at present) Bakelite resine (resol, phenolic resins), product from Africa are known under the misleading name "African amber". Carbamide resins — melamine, formaldehyde and urea-formaldehyde resins. Epoxy novolac (phenolic resins), unofficial name "antique amber", not in the use at present Polyesters (Polish amber imitation) with styrene. For example, unsaturated polyester resins (polymals) are produced by Chemical Industrial Works "Organika" in Sarzyna, Poland; estomal are produced by Laminopol firm. Polybern or sticked amber is artificial resins the curled chips are obtained, whereas in the case of amber – small scraps. "African amber" (polyester, synacryl is then probably other name of the same resine) are produced by Reichhold firm; Styresol trade mark or alkid resin (used in Russia, Reichhold, Inc. patent, 1948. Polyethylene Epoxy resins Polystyrene and polystyrene-like polymers (vinyl polymers). The resins of acrylic type (vinyl polymers), especially polymethyl methacrylate PMMA (trade mark Plexiglass, metaplex). See also Ammolite List of types of amber Petrified wood Pearl Poly(methyl methacrylate) Precious coral References Bibliography External links Farlang many full text historical references on Amber Theophrastus, George Frederick Kunz, and special on Baltic amber. IPS Publications on amber inclusions International Paleoentomological Society: Scientific Articles on amber and its inclusions Webmineral on Amber Physical properties and mineralogical information Mindat Amber Image and locality information on amber NY Times 40 million year old extinct bee in Dominican amber Fossil resins Amorphous solids Traditional medicine	5
"Amazing Grace" is a Christian hymn published in 1779 with words written in 1772 by English Anglican clergyman and poet John Newton (1725–1807). It is an immensely popular hymn, particularly in the United States, where it is used for both religious and secular purposes. Newton wrote the words from personal experience; he grew up without any particular religious conviction, but his life's path was formed by a variety of twists and coincidences that were often put into motion by others' reactions to what they took as his recalcitrant insubordination. He was pressed into service with the Royal Navy, and after leaving the service, he became involved in the Atlantic slave trade. In 1748, a violent storm battered his vessel off the coast of County Donegal, Ireland, so severely that he called out to God for mercy. While this moment marked his spiritual conversion, he continued slave trading until 1754 or 1755, when he ended his seafaring altogether. Newton began studying Christian theology and later became an abolitionist. Ordained in the Church of England in 1764, Newton became the curate of Olney, Buckinghamshire, where he began to write hymns with poet William Cowper. "Amazing Grace" was written to illustrate a sermon on New Year's Day of 1773. It is unknown if there was any music accompanying the verses; it may have been chanted by the congregation. It debuted in print in 1779 in Newton's and Cowper's Olney Hymns, but settled into relative obscurity in England. In the United States, "Amazing Grace" became a popular song used by Baptist and Methodist preachers as part of their evangelizing, especially in the American South, during the Second Great Awakening of the early 19th century. It has been associated with more than 20 melodies. In 1835, American composer William Walker set it to the tune known as "New Britain" in a shape note format; this is the version most frequently sung today. With the message that forgiveness and redemption are possible regardless of sins committed and that the soul can be delivered from despair through the mercy of God, "Amazing Grace" is one of the most recognisable songs in the English-speaking world. American historian Gilbert Chase writes that it is "without a doubt the most famous of all the folk hymns" and Jonathan Aitken, a Newton biographer, estimates that the song is performed about 10 million times annually. It has had particular influence in folk music, and has become an emblematic black spiritual. Its universal message has been a significant factor in its crossover into secular music. "Amazing Grace" became newly popular during the 1960s revival of American folk music, and it has been recorded thousands of times during and since the 20th century. John Newton's conversion According to the Dictionary of American Hymnology, "Amazing Grace" is John Newton's spiritual autobiography in verse. In 1725, Newton was born in Wapping, a district in London near the Thames. His father was a shipping merchant who was brought up as a Catholic but had Protestant sympathies, and his mother was a devout Independent, unaffiliated with the Anglican Church. She had intended Newton to become a clergyman, but she died of tuberculosis when he was six years old. For the next few years, while his father was at sea Newton was raised by his emotionally distant stepmother. He was also sent to boarding school, where he was mistreated. At the age of eleven, he joined his father on a ship as an apprentice; his seagoing career would be marked by headstrong disobedience. As a youth, Newton began a pattern of coming very close to death, examining his relationship with God, then relapsing into bad habits. As a sailor, he denounced his faith after being influenced by a shipmate who discussed with him Characteristicks of Men, Manners, Opinions, Times, a book by the Third Earl of Shaftesbury. In a series of letters Newton later wrote, "Like an unwary sailor who quits his port just before a rising storm, I renounced the hopes and comforts of the Gospel at the very time when every other comfort was about to fail me." His disobedience caused him to be pressed into the Royal Navy, and he took advantage of opportunities to overstay his leave. He deserted the navy to visit Mary "Polly" Catlett, a family friend with whom he had fallen in love. After enduring humiliation for deserting, he was traded as crew to a slave ship. He began a career in slave trading. Newton often openly mocked the captain by creating obscene poems and songs about him, which became so popular that the crew began to join in. His disagreements with several colleagues resulted in his being starved almost to death, imprisoned while at sea, and chained like the slaves they carried. He was himself enslaved by the Sherbro and forced to work on a plantation in Sierra Leone near the Sherbro River. After several months he came to think of Sierra Leone as his home, but his father intervened after Newton sent him a letter describing his circumstances, and crew from another ship happened to find him. Newton claimed the only reason he left Sierra Leone was because of Polly. While aboard the ship Greyhound, Newton gained notoriety as being one of the most profane men the captain had ever met. In a culture where sailors habitually swore, Newton was admonished several times for not only using the worst words the captain had ever heard, but creating new ones to exceed the limits of verbal debauchery. In March 1748, while the Greyhound was in the North Atlantic, a violent storm came upon the ship that was so rough it swept overboard a crew member who was standing where Newton had been moments before. After hours of the crew emptying water from the ship and expecting to be capsized, Newton and another mate tied themselves to the ship's pump to keep from being washed overboard, working for several hours. After proposing the measure to the captain, Newton had turned and said, "If this will not do, then Lord have mercy upon us!" Newton rested briefly before returning to the deck to steer for the next eleven hours. During his time at the wheel, he pondered his divine challenge. About two weeks later, the battered ship and starving crew landed in Lough Swilly, Ireland. For several weeks before the storm, Newton had been reading The Christian's Pattern, a summary of the 15th-century The Imitation of Christ by Thomas à Kempis. The memory of his own "Lord have mercy upon us!" uttered during a moment of desperation in the storm did not leave him; he began to ask if he was worthy of God's mercy or in any way redeemable. Not only had he neglected his faith but directly opposed it, mocking others who showed theirs, deriding and denouncing God as a myth. He came to believe that God had sent him a profound message and had begun to work through him. Newton's conversion was not immediate, but he contacted Polly's family and announced his intention to marry her. Her parents were hesitant as he was known to be unreliable and impetuous. They knew he was profane too but allowed him to write to Polly, and he set to begin to submit to authority for her sake. He sought a place on a slave ship bound for Africa, and Newton and his crewmates participated in most of the same activities he had written about before; the only immorality from which he was able to free himself was profanity. After a severe illness his resolve was renewed, yet he retained the same attitude towards slavery as was held by his contemporaries. Newton continued in the slave trade through several voyages where he sailed the coasts of Africa, now as a captain, and procured slaves being offered for sale in larger ports, transporting them to North America. In between voyages, he married Polly in 1750, and he found it more difficult to leave her at the beginning of each trip. After three shipping voyages in the slave trade, Newton was promised a position as ship's captain with cargo unrelated to slavery. But at the age of thirty, he collapsed and never sailed again. Olney curate Working as a customs agent in Liverpool starting in 1756, Newton began to teach himself Latin, Greek, and theology. He and Polly immersed themselves in the church community, and Newton's passion was so impressive that his friends suggested he become a priest in the Church of England. He was turned down by John Gilbert, Archbishop of York, in 1758, ostensibly for having no university degree, although the more likely reasons were his leanings toward evangelism and tendency to socialise with Methodists. Newton continued his devotions, and after being encouraged by a friend, he wrote about his experiences in the slave trade and his conversion. William Legge, 2nd Earl of Dartmouth, impressed with his story, sponsored Newton for ordination by John Green, Bishop of Lincoln, and offered him the curacy of Olney, Buckinghamshire, in 1764. Olney Hymns Olney was a village of about 2,500 residents whose main industry was making lace by hand. The people were mostly illiterate and many of them were poor. Newton's preaching was unique in that he shared many of his own experiences from the pulpit; many clergy preached from a distance, not admitting any intimacy with temptation or sin. He was involved in his parishioners' lives and was much loved, although his writing and delivery were sometimes unpolished. But his devotion and conviction were apparent and forceful, and he often said his mission was to "break a hard heart and to heal a broken heart". He struck a friendship with William Cowper, a gifted writer who had failed at a career in law and suffered bouts of insanity, attempting suicide several times. Cowper enjoyed Olney and Newton's company; he was also new to Olney and had gone through a spiritual conversion similar to Newton's. Together, their effect on the local congregation was impressive. In 1768, they found it necessary to start a weekly prayer meeting to meet the needs of an increasing number of parishioners. They also began writing lessons for children. Partly from Cowper's literary influence, and partly because learned vicars were expected to write verses, Newton began to try his hand at hymns, which had become popular through the language, made plain for common people to understand. Several prolific hymn writers were at their most productive in the 18th century, including Isaac Watts whose hymns Newton had grown up hearing and Charles Wesley, with whom Newton was familiar. Wesley's brother John, the eventual founder of the Methodist Church, had encouraged Newton to go into the clergy. Watts was a pioneer in English hymn writing, basing his work after the Psalms. The most prevalent hymns by Watts and others were written in the common meter in 8.6.8.6: the first line is eight syllables and the second is six. Newton and Cowper attempted to present a poem or hymn for each prayer meeting. The lyrics to "Amazing Grace" were written in late 1772 and probably used in a prayer meeting for the first time on 1 January 1773. A collection of the poems Newton and Cowper had written for use in services at Olney was bound and published anonymously in 1779 under the title Olney Hymns. Newton contributed 280 of the 348 texts in Olney Hymns; "1 Chronicles 17:16–17, Faith's Review and Expectation" was the title of the poem with the first line "Amazing grace! (how sweet the sound)". Critical analysis The general impact of Olney Hymns was immediate and it became a widely popular tool for evangelicals in Britain for many years. Scholars appreciated Cowper's poetry somewhat more than Newton's plaintive and plain language, expressing his forceful personality. The most prevalent themes in the verses written by Newton in Olney Hymns are faith in salvation, wonder at God's grace, his love for Jesus, and his cheerful exclamations of the joy he found in his faith. As a reflection of Newton's connection to his parishioners, he wrote many of the hymns in first person, admitting his own experience with sin. Bruce Hindmarsh in Sing Them Over Again To Me: Hymns and Hymnbooks in America considers "Amazing Grace" an excellent example of Newton's testimonial style afforded by the use of this perspective. Several of Newton's hymns were recognised as great work ("Amazing Grace" was not among them), while others seem to have been included to fill in when Cowper was unable to write. Jonathan Aitken calls Newton, specifically referring to "Amazing Grace", an "unashamedly middlebrow lyricist writing for a lowbrow congregation", noting that only twenty-one of the nearly 150 words used in all six verses have more than one syllable. William Phipps in the Anglican Theological Review and author James Basker have interpreted the first stanza of "Amazing Grace" as evidence of Newton's realisation that his participation in the slave trade was his wretchedness, perhaps representing a wider common understanding of Newton's motivations. Newton joined forces with William Wilberforce, the British Member of Parliament who led the Parliamentarian campaign to abolish the slave trade in the British Empire, culminating in the Slave Trade Act 1807. But Newton did not become an ardent and outspoken abolitionist until after he left Olney in the 1780s; he is not known to have connected writing the hymn known as "Amazing Grace" to anti-slavery sentiments. The lyrics in Olney Hymns were arranged by their association to the Biblical verses that would be used by Newton and Cowper in their prayer meetings, and did not address any political objective. For Newton, the beginning of the year was a time to reflect on one's spiritual progress. At the same time he completed a diary which has since been lost that he had begun 17 years before, two years after he quit sailing. The last entry of 1772 was a recounting of how much he had changed since then. The title ascribed to the hymn, "1 Chronicles 17:16–17", refers to David's reaction to the prophet Nathan telling him that God intends to maintain his family line forever. Some Christians interpret this as a prediction that Jesus Christ, as a descendant of David, was promised by God as the salvation for all people. Newton's sermon on that January day in 1773 focused on the necessity to express one's gratitude for God's guidance, that God is involved in the daily lives of Christians though they may not be aware of it, and that patience for deliverance from the daily trials of life is warranted when the glories of eternity await. Newton saw himself a sinner like David who had been chosen, perhaps undeservedly, and was humbled by it. According to Newton, unconverted sinners were "blinded by the god of this world" until "mercy came to us not only undeserved but undesired ... our hearts endeavored to shut him out till he overcame us by the power of his grace." The New Testament served as the basis for many of the lyrics of "Amazing Grace". The first verse, for example, can be traced to the story of the Prodigal Son. In the Gospel of Luke the father says, "For this son of mine was dead and is alive again; he was lost, and is found". The story of Jesus healing a blind man who tells the Pharisees that he can now see is told in the Gospel of John. Newton used the words "I was blind but now I see" and declared "Oh to grace how great a debtor!" in his letters and diary entries as early as 1752. The effect of the lyrical arrangement, according to Bruce Hindmarsh, allows an instant release of energy in the exclamation "Amazing grace!", to be followed by a qualifying reply in "how sweet the sound". In An Annotated Anthology of Hymns, Newton's use of an exclamation at the beginning of his verse is called "crude but effective" in an overall composition that "suggest(s) a forceful, if simple, statement of faith". Grace is recalled three times in the following verse, culminating in Newton's most personal story of his conversion, underscoring the use of his personal testimony with his parishioners. The sermon preached by Newton was his last of those that William Cowper heard in Olney, since Cowper's mental instability returned shortly thereafter. One author suggests Newton may have had his friend in mind, employing the themes of assurance and deliverance from despair for Cowper's benefit. Dissemination More than 60 of Newton and Cowper's hymns were republished in other British hymnals and magazines, but "Amazing Grace" was not, appearing only once in a 1780 hymnal sponsored by the Countess of Huntingdon. Scholar John Julian commented in his 1892 A Dictionary of Hymnology that outside of the United States, the song was unknown and it was "far from being a good example of Newton's finest work". Between 1789 and 1799, four variations of Newton's hymn were published in the US in Baptist, Dutch Reformed, and Congregationalist hymnodies; by 1830 Presbyterians and Methodists also included Newton's verses in their hymnals. Although it had its roots in England, "Amazing Grace" became an integral part of the Christian tapestry in the United States. The greatest influences in the 19th century that propelled "Amazing Grace" to spread across the US and become a staple of religious services in many denominations and regions were the Second Great Awakening and the development of shape note singing communities. A tremendous religious movement swept the US in the early 19th century, marked by the growth and popularity of churches and religious revivals that got their start on the frontier in Kentucky and Tennessee. Unprecedented gatherings of thousands of people attended camp meetings where they came to experience salvation; preaching was fiery and focused on saving the sinner from temptation and backsliding. Religion was stripped of ornament and ceremony, and made as plain and simple as possible; sermons and songs often used repetition to get across to a rural population of poor and mostly uneducated people the necessity of turning away from sin. Witnessing and testifying became an integral component to these meetings, where a congregation member or stranger would rise and recount his turn from a sinful life to one of piety and peace. "Amazing Grace" was one of many hymns that punctuated fervent sermons, although the contemporary style used a refrain, borrowed from other hymns, that employed simplicity and repetition such as: Simultaneously, an unrelated movement of communal singing was established throughout the South and Western states. A format of teaching music to illiterate people appeared in 1800. It used four sounds to symbolise the basic scale: fa-sol-la-fa-sol-la-mi-fa. Each sound was accompanied by a specifically shaped note and thus became known as shape note singing. The method was simple to learn and teach, so schools were established throughout the South and West. Communities would come together for an entire day of singing in a large building where they sat in four distinct areas surrounding an open space, one member directing the group as a whole. Other groups would sing outside, on benches set up in a square. Preachers used shape note hymns to teach people on the frontier and to raise the emotion of camp meetings. Most of the music was Christian, but the purpose of communal singing was not primarily spiritual. Communities either could not afford music accompaniment or rejected it out of a Calvinistic sense of simplicity, so the songs were sung a cappella. "New Britain" tune When originally used in Olney, it is unknown what music, if any, accompanied the verses written by John Newton. Contemporary hymnbooks did not contain music and were simply small books of religious poetry. The first known instance of Newton's lines joined to music was in A Companion to the Countess of Huntingdon's Hymns (London, 1808), where it is set to the tune "Hephzibah" by English composer John Jenkins Husband. Common meter hymns were interchangeable with a variety of tunes; more than twenty musical settings of "Amazing Grace" circulated with varying popularity until 1835, when American composer William Walker assigned Newton's words to a traditional song named "New Britain". This was an amalgamation of two melodies ("Gallaher" and "St. Mary"), first published in the Columbian Harmony by Charles H. Spilman and Benjamin Shaw (Cincinnati, 1829). Spilman and Shaw, both students at Kentucky's Centre College, compiled their tunebook both for public worship and revivals, to satisfy "the wants of the Church in her triumphal march". Most of the tunes had been previously published, but "Gallaher" and "St. Mary" had not. As neither tune is attributed and both show elements of oral transmission, scholars can only speculate that they are possibly of British origin. A manuscript from 1828 by Lucius Chapin, a famous hymn writer of that time, contains a tune very close to "St. Mary", but that does not mean that he wrote it. "Amazing Grace", with the words written by Newton and joined with "New Britain", the melody most currently associated with it, appeared for the first time in Walker's shape note tunebook Southern Harmony in 1847. It was, according to author Steve Turner, a "marriage made in heaven ... The music behind 'amazing' had a sense of awe to it. The music behind 'grace' sounded graceful. There was a rise at the point of confession, as though the author was stepping out into the open and making a bold declaration, but a corresponding fall when admitting his blindness." Walker's collection was enormously popular, selling about 600,000 copies all over the US when the total population was just over 20 million. Another shape note tunebook named The Sacred Harp (1844) by Georgia residents Benjamin Franklin White and Elisha J. King became widely influential and continues to be used. Another verse was first recorded in Harriet Beecher Stowe's immensely influential 1852 anti-slavery novel Uncle Tom's Cabin. Three verses were emblematically sung by Tom in his hour of deepest crisis. He sings the sixth and fifth verses in that order, and Stowe included another verse, not written by Newton, that had been passed down orally in African-American communities for at least 50 years. It was one of between 50 and 70 verses of a song titled "Jerusalem, My Happy Home", which was first published in a 1790 book called A Collection of Sacred Ballads: "Amazing Grace" came to be an emblem of a Christian movement and a symbol of the US itself as the country was involved in a great political experiment, attempting to employ democracy as a means of government. Shape-note singing communities, with all the members sitting around an open center, each song employing a different song leader, illustrated this in practice. Simultaneously, the US began to expand westward into previously unexplored territory that was often wilderness. The "dangers, toils, and snares" of Newton's lyrics had both literal and figurative meanings for Americans. This became poignantly true during the most serious test of American cohesion in the U.S. Civil War (1861–1865). "Amazing Grace", set to "New Britain", was included in two hymnals distributed to soldiers. With death so real and imminent, religious services in the military became commonplace. The hymn was translated into other languages as well: while on the Trail of Tears, the Cherokee sang Christian hymns as a way of coping with the ongoing tragedy, and a version of the song by Samuel Worcester that had been translated into the Cherokee language became very popular. Urban revival Although "Amazing Grace" set to "New Britain" was popular, other versions existed regionally. Primitive Baptists in the Appalachian region often used "New Britain" with other hymns, and sometimes sing the words of "Amazing Grace" to other folk songs, including titles such as "In the Pines", "Pisgah", "Primrose", and "Evan", as all are able to be sung in common meter, of which the majority of their repertoire consists. In the late 19th century, Newton's verses were sung to a tune named "Arlington" as frequently as to "New Britain" for a time. Two musical arrangers named Dwight Moody and Ira Sankey heralded another religious revival in the cities of the US and Europe, giving the song international exposure. Moody's preaching and Sankey's musical gifts were significant; their arrangements were the forerunners of gospel music, and churches all over the US were eager to acquire them. Moody and Sankey began publishing their compositions in 1875, and "Amazing Grace" appeared three times with three different melodies, but they were the first to give it its title; hymns were typically published using the incipits (first line of the lyrics), or the name of the tune such as "New Britain". Publisher Edwin Othello Excell gave the version of "Amazing Grace" set to "New Britain" immense popularity by publishing it in a series of hymnals that were used in urban churches. Excell altered some of Walker's music, making it more contemporary and European, giving "New Britain" some distance from its rural folk-music origins. Excell's version was more palatable for a growing urban middle class and arranged for larger church choirs. Several editions featuring Newton's first three stanzas and the verse previously included by Harriet Beecher Stowe in Uncle Tom's Cabin were published by Excell between 1900 and 1910. His version of "Amazing Grace" became the standard form of the song in American churches. Recorded versions With the advent of recorded music and radio, "Amazing Grace" began to cross over from primarily a gospel standard to secular audiences. The ability to record combined with the marketing of records to specific audiences allowed "Amazing Grace" to take on thousands of different forms in the 20th century. Where Edwin Othello Excell sought to make the singing of "Amazing Grace" uniform throughout thousands of churches, records allowed artists to improvise with the words and music specific to each audience. AllMusic lists over 1,000 recordings – including re-releases and compilations – as of 2019. Its first recording is an a cappella version from 1922 by the Sacred Harp Choir. It was included from 1926 to 1930 in Okeh Records' catalogue, which typically concentrated strongly on blues and jazz. Demand was high for black gospel recordings of the song by H. R. Tomlin and J. M. Gates. A poignant sense of nostalgia accompanied the recordings of several gospel and blues singers in the 1940s and 1950s who used the song to remember their grandparents, traditions, and family roots. It was recorded with musical accompaniment for the first time in 1930 by Fiddlin' John Carson, although to another folk hymn named "At the Cross", not to "New Britain". "Amazing Grace" is emblematic of several kinds of folk music styles, often used as the standard example to illustrate such musical techniques as lining out and call and response, that have been practised in both black and white folk music. Mahalia Jackson's 1947 version received significant radio airplay, and as her popularity grew throughout the 1950s and 1960s, she often sang it at public events such as concerts at Carnegie Hall. Author James Basker states that the song has been employed by African Americans as the "paradigmatic Negro spiritual" because it expresses the joy felt at being delivered from slavery and worldly miseries. Anthony Heilbut, author of The Gospel Sound, states that the "dangers, toils, and snares" of Newton's words are a "universal testimony" of the African American experience. During the civil rights movement and opposition to the Vietnam War, the song took on a political tone. Mahalia Jackson employed "Amazing Grace" for Civil Rights marchers, writing that she used it "to give magical protection a charm to ward off danger, an incantation to the angels of heaven to descend ... I was not sure the magic worked outside the church walls ... in the open air of Mississippi. But I wasn't taking any chances." Folk singer Judy Collins, who knew the song before she could remember learning it, witnessed Fannie Lou Hamer leading marchers in Mississippi in 1964, singing "Amazing Grace". Collins also considered it a talisman of sorts, and saw its equal emotional impact on the marchers, witnesses, and law enforcement who opposed the civil rights demonstrators. According to fellow folk singer Joan Baez, it was one of the most requested songs from her audiences, but she never realised its origin as a hymn; by the time she was singing it in the 1960s she said it had "developed a life of its own". It even made an appearance at the Woodstock Music Festival in 1969 during Arlo Guthrie's performance. Collins decided to record it in the late 1960s amid an atmosphere of counterculture introspection; she was part of an encounter group that ended a contentious meeting by singing "Amazing Grace" as it was the only song to which all the members knew the words. Her producer was present and suggested she include a version of it on her 1970 album Whales & Nightingales. Collins, who had a history of alcohol abuse, claimed that the song was able to "pull her through" to recovery. It was recorded in St. Paul's, the chapel at Columbia University, chosen for the acoustics. She chose an a cappella arrangement that was close to Edwin Othello Excell's, accompanied by a chorus of amateur singers who were friends of hers. Collins connected it to the Vietnam War, to which she objected: "I didn't know what else to do about the war in Vietnam. I had marched, I had voted, I had gone to jail on political actions and worked for the candidates I believed in. The war was still raging. There was nothing left to do, I thought ... but sing 'Amazing Grace'." Gradually and unexpectedly, the song began to be played on the radio, and then be requested. It rose to number 15 on the Billboard Hot 100, remaining on the charts for 15 weeks, as if, she wrote, her fans had been "waiting to embrace it". In the UK, it charted 8 times between 1970 and 1972, peaking at number 5 and spending a total of 75 weeks on popular music charts. Her rendition also reached number 5 in New Zealand and number 12 in Ireland in 1971. In 1972, the Royal Scots Dragoon Guards, the senior Scottish regiment of the British Army, recorded an instrumental version featuring a bagpipe soloist accompanied by a pipe band. The tempo of their arrangement was slowed to allow for the bagpipes, but it was based on Collins's: it began with a bagpipe solo introduction similar to her lone voice, then it was accompanied by the band of bagpipes and horns, whereas in her version she is backed up by a chorus. It became an international hit, spending five weeks at number-one in the UK Singles Chart, topping the RPM national singles chart in Canada for three weeks, and also peaking at number 11 on the Billboard Hot 100 in the US. It is also a controversial instrumental, as it combined pipes with a military band. The Pipe Major of the Royal Scots Dragoon Guards was summoned to Edinburgh Castle and chastised for demeaning the bagpipes. Aretha Franklin and Rod Stewart also recorded "Amazing Grace" around the same time, and both of their renditions were popular. All four versions were marketed to distinct types of audiences, thereby assuring its place as a pop song. Johnny Cash recorded it on his 1975 album Sings Precious Memories, dedicating it to his older brother Jack, who had been killed in a mill accident when they were boys in Dyess, Arkansas. Cash and his family sang it to themselves while they worked in the cotton fields following Jack's death. Cash often included the song when he toured prisons, saying "For the three minutes that song is going on, everybody is free. It just frees the spirit and frees the person." The U.S. Library of Congress has a collection of 3,000 versions of and songs inspired by "Amazing Grace", some of which were first-time recordings by folklorists Alan and John Lomax, a father and son team who in 1932 travelled thousands of miles across the southern states of the US to capture the different regional styles of the song. More contemporary renditions include samples from such popular artists as Sam Cooke and the Soul Stirrers (1963), the Byrds (1970), Elvis Presley (1971), Skeeter Davis (1972), Mighty Clouds of Joy (1972), Amazing Rhythm Aces (1975), Willie Nelson (1976) and the Lemonheads (1992). In American popular culture "Amazing Grace" is an icon in American culture that has been used for a variety of secular purposes and marketing campaigns. It is referenced in the 2006 film Amazing Grace, which highlights Newton's influence on the leading British abolitionist William Wilberforce, in the film biography of Newton, Newton's Grace, and the 2014 film Freedom which tells the story of Newton's composition of the hymn. Since 1954, when an organ instrumental of "New Britain" became a best-seller, "Amazing Grace" has been associated with funerals and memorial services. The hymn has become a song that inspires hope in the wake of tragedy, becoming a sort of "spiritual national anthem" according to authors Mary Rourke and Emily Gwathmey. For example, President Barack Obama recited and later sang the hymn at the memorial service for Clementa Pinckney, who was one of the nine victims of the Charleston church shooting in 2015. Modern interpretations In recent years, the words of the hymn have been changed in some religious publications to downplay a sense of imposed self-loathing by its singers. The second line, "That saved a wretch like me!" has been rewritten as "That saved and strengthened me", "save a soul like me", or "that saved and set me free". Kathleen Norris in her book Amazing Grace: A Vocabulary of Faith characterises this transformation of the original words as "wretched English" making the line that replaces the original "laughably bland". Part of the reason for this change has been the altered interpretations of what wretchedness and grace means. Newton's Calvinistic view of redemption and divine grace formed his perspective that he considered himself a sinner so vile that he was unable to change his life or be redeemed without God's help. Yet his lyrical subtlety, in Steve Turner's opinion, leaves the hymn's meaning open to a variety of Christian and non-Christian interpretations. "Wretch" also represents a period in Newton's life when he saw himself outcast and miserable, as he was when he was enslaved in Sierra Leone; his own arrogance was matched by how far he had fallen in his life. Due to its immense popularity and iconic nature, the meaning behind the words of "Amazing Grace" has become as individual as the singer or listener. Bruce Hindmarsh suggests that the secular popularity of "Amazing Grace" is due to the absence of any mention of God in the lyrics until the fourth verse (by Excell's version, the fourth verse begins "When we've been there ten thousand years"), and that the song represents the ability of humanity to transform itself instead of a transformation taking place at the hands of God. "Grace", however, had a clearer meaning to John Newton, as he used the word to represent God or the power of God. The transformative power of the song was investigated by journalist Bill Moyers in a documentary released in 1990. Moyers was inspired to focus on the song's power after watching a performance at Lincoln Center, where the audience consisted of Christians and non-Christians, and he noticed that it had an equal impact on everybody in attendance, unifying them. James Basker also acknowledged this force when he explained why he chose "Amazing Grace" to represent a collection of anti-slavery poetry: "there is a transformative power that is applicable ... : the transformation of sin and sorrow into grace, of suffering into beauty, of alienation into empathy and connection, of the unspeakable into imaginative literature." Moyers interviewed Collins, Cash, opera singer Jessye Norman, Appalachian folk musician Jean Ritchie and her family, white Sacred Harp singers in Georgia, black Sacred Harp singers in Alabama, and a prison choir at the Texas State Penitentiary at Huntsville. Collins, Cash, and Norman were unable to discern if the power of the song came from the music or the lyrics. Norman, who once notably sang it at the end of a large outdoor rock concert for Nelson Mandela's 70th birthday, stated, "I don't know whether it's the text I don't know whether we're talking about the lyrics when we say that it touches so many people or whether it's that tune that everybody knows." A prisoner interviewed by Moyers explained his literal interpretation of the second verse: "'Twas grace that taught my heart to fear, and grace my fears relieved" by saying that the fear became immediately real to him when he realised he may never get his life in order, compounded by the loneliness and restriction in prison. Gospel singer Marion Williams summed up its effect: "That's a song that gets to everybody". The Dictionary of American Hymnology claims it is included in more than a thousand published hymnals, and recommends its use for "occasions of worship when we need to confess with joy that we are saved by God's grace alone; as a hymn of response to forgiveness of sin or as an assurance of pardon; as a confession of faith or after the sermon". Notes References Citations Sources Aitken, Jonathan (2007). John Newton: From Disgrace to Amazing Grace, Crossway Books. Basker, James (2002). Amazing Grace: An Anthology of Poems About Slavery, 1660–1810, Yale University Press. Benson, Louis (1915). The English Hymn: Its Development and Use in Worship, The Presbyterian Board of Publication, Philadelphia. Bradley, Ian (ed.)(1989). The Book of Hymns, The Overlook Press. Brown, Tony; Kutner, Jon; Warwick, Neil (2000). Complete Book of the British Charts: Singles & Albums, Omnibus. Bruner, Kurt; Ware, Jim (2007). Finding God in the Story of Amazing Grace, Tyndale House Publishers, Inc. Chase, Gilbert (1987). America's Music, From the Pilgrims to the Present, McGraw-Hill. Collins, Judy (1998). Singing Lessons: A Memoir of Love, Loss, Hope, and Healing , Pocket Books. Duvall, Deborah (2000). Tahlequah and the Cherokee Nation, Arcadia Publishing. Julian, John (ed.)(1892). A Dictionary of Hymnology, Charles Scribner's Sons, New York. Martin, Bernard (1950). John Newton: A Biography, William Heineman, Ltd., London. Martin, Bernard and Spurrell, Mark, (eds.)(1962). The Journal of a Slave Trader (John Newton), The Epworth Press, London. Newton, John (1811). Thoughts Upon the African Slave Trade, Samuel Whiting and Co., London. Newton, John (1824). The Works of the Rev. John Newton Late Rector of the United Parishes of St. Mary Woolnoth and St. Mary Woolchurch Haw, London: Volume 1, Nathan Whiting, London. Noll, Mark A.; Blumhofer, Edith L. (eds.) (2006). Sing Them Over Again to Me: Hymns and Hymnbooks in America, University of Alabama Press. Norris, Kathleen (1999). Amazing Grace: A Vocabulary of Faith, Riverhead. Patterson, Beverly Bush (1995). The Sound of the Dove: Singing in Appalachian Primitive Baptist Churches, University of Illinois Press. Porter, Jennifer; McLaren, Darcee (eds.)(1999). Star Trek and Sacred Ground: Explorations of Star Trek, Religion, and American Culture, State University of New York Press, Rourke, Mary; Gwathmey, Emily (1996). Amazing Grace in America: Our Spiritual National Anthem, Angel City Press. Stowe, Harriet Beecher (1899). Uncle Tom's Cabin, or Life Among the Lowly, R. F. Fenno & Company, New York City. Swiderski, Richard (1996). The Metamorphosis of English: Versions of Other Languages, Greenwood Publishing Group. Turner, Steve (2002). Amazing Grace: The Story of America's Most Beloved Song, HarperCollins. Watson, J. R. (ed.)(2002). An Annotated Anthology of Hymns, Oxford University Press. Whitburn, Joel (2003). Joel Whitburn's Top Pop Singles, 1955–2002, Record Research, Inc. External links Amazing Grace at Hymnary.org The Amazing Grace U.S. Library of Congress Amazing Grace collection Cowper & Newton Museum in Olney, England Amazing Grace: Some Early Tunes Anthology of the American Hymn-Tune Repertory Amazing Grace: The story behind the song and its connection to Lough Swilly 1772 songs 18th-century hymns 1970 singles 1971 singles 1972 singles 2007 singles Elvis Presley songs English Christian hymns English patriotic songs Funerary and memorial compositions Gospel songs Hymns by John Newton Irish Singles Chart number-one singles Joan Baez songs Number-one singles in Australia Number-one singles in South Africa Okeh Records singles RPM Top Singles number-one singles UK Singles Chart number-one singles United States National Recording Registry recordings	5
AOL (stylized as Aol., formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City. It is a brand marketed by the current incarnation of Yahoo! Inc. The service traces its history to an online service known as PlayNET. PlayNET licensed its software to Quantum Link (Q-Link), that went online in November 1985. A new IBM PC client was launched in 1988, and eventually renamed as America Online in 1989. AOL grew to become the largest online service, displacing established players like CompuServe and The Source. By 1995, AOL had about three million active users. AOL was one of the early pioneers of the Internet in the early-1990s, and the most recognized brand on the web in the United States. It originally provided a dial-up service to millions of Americans, pioneered instant messaging, and in 1993 began adding internet access. In 1998, AOL purchased Netscape for US$4.2 billion. In 2001, at the height of its popularity, it purchased the media conglomerate Time Warner in the largest merger in U.S. history. AOL rapidly shrank thereafter, partly due to the decline of dial-up and rise of broadband. AOL was eventually spun off from Time Warner in 2009, with Tim Armstrong appointed the new CEO. Under his leadership, the company invested in media brands and advertising technologies. On June 23, 2015, AOL was acquired by Verizon Communications for $4.4 billion. On May 3, 2021, Verizon announced it would sell Yahoo and AOL to private equity firm Apollo Global Management for $5 billion. On September 1, 2021, AOL became part of the new Yahoo! Inc. History 1983–1991: early years AOL began in 1983, as a short-lived venture called Control Video Corporation (CVC), founded by William von Meister. Its sole product was an online service called GameLine for the Atari 2600 video game console, after von Meister's idea of buying music on demand was rejected by Warner Bros. Subscribers bought a modem from the company for $49.95 and paid a one-time $15 setup fee. GameLine permitted subscribers to temporarily download games and keep track of high scores, at a cost of $1 per game. The telephone disconnected and the downloaded game would remain in GameLine's Master Module and playable until the user turned off the console or downloaded another game. In January 1983, Steve Case was hired as a marketing consultant for Control Video on the recommendation of his brother, investment banker Dan Case. In May 1983, Jim Kimsey became a manufacturing consultant for Control Video, which was near bankruptcy. Kimsey was brought in by his West Point friend Frank Caufield, an investor in the company. In early 1985, von Meister left the company. On May 24, 1985, Quantum Computer Services, an online services company, was founded by Kimsey from the remnants of Control Video, with Kimsey as chief executive officer, and Marc Seriff as chief technology officer. The technical team consisted of Seriff, Tom Ralston, Ray Heinrich, Steve Trus, Ken Huntsman, Janet Hunter, Dave Brown, Craig Dykstra, Doug Coward, and Mike Ficco. In 1987, Case was promoted again to executive vice-president. Kimsey soon began to groom Case to take over the role of CEO, which he did when Kimsey retired in 1991. Kimsey changed the company's strategy, and in 1985, launched a dedicated online service for Commodore 64 and 128 computers, originally called Quantum Link ("Q-Link" for short). The Quantum Link software was based on software licensed from PlayNet, Inc, (founded in 1983 by Howard Goldberg and Dave Panzl). The service was different from other online services as it used the computing power of the Commodore 64 and the Apple II rather than just a "dumb" terminal. It passed tokens back and forth and provided a fixed price service tailored for home users. In May 1988, Quantum and Apple launched AppleLink Personal Edition for Apple II and Macintosh computers. In August 1988, Quantum launched PC Link, a service for IBM-compatible PCs developed in a joint venture with the Tandy Corporation. After the company parted ways with Apple in October 1989, Quantum changed the service's name to America Online. Case promoted and sold AOL as the online service for people unfamiliar with computers, in contrast to CompuServe, which was well established in the technical community. From the beginning, AOL included online games in its mix of products; many classic and casual games were included in the original PlayNet software system. the company introduced many innovative online interactive titles and games, including: Graphical chat environments Habitat (1986–1988) from LucasArts. The first online interactive fiction series QuantumLink Serial by Tracy Reed (1988). Quantum Space, the first fully automated play-by-mail game (1989–1991). 1991–2006: Internet age, Time Warner merger In February 1991, AOL for DOS was launched using a GeoWorks interface; it was followed a year later by AOL for Windows. This coincided with growth in pay-based online services, like Prodigy, CompuServe, and GEnie. 1991 also saw the introduction of an original Dungeons & Dragons title called Neverwinter Nights from Stormfront Studios; which was one of the first Multiplayer Online Role Playing Games to depict the adventure with graphics instead of text. During the early 1990s, the average subscription lasted for about 25 months and accounted for $350 in total revenue. Advertisements invited modem owners to "Try America Online FREE", promising free software and trial membership. AOL discontinued Q-Link and PC Link in late 1994. In September 1993, AOL added Usenet access to its features. This is commonly referred to as the "Eternal September", as Usenet's cycle of new users was previously dominated by smaller numbers of college and university freshmen gaining access in September and taking a few weeks to acclimate. This also coincided with a new "carpet bombing" marketing campaign by CMO Jan Brandt to distribute as many free trial AOL trial disks as possible through nonconventional distribution partners. At one point, 50% of the CDs produced worldwide had an AOL logo. AOL quickly surpassed GEnie, and by the mid-1990s, it passed Prodigy (which for several years allowed AOL advertising) and CompuServe. In November 1994, AOL purchased Booklink for its web browser, to give its users web access. In 1996, AOL replaced Booklink with a browser based on Internet Explorer, allegedly in exchange for inclusion of AOL in Windows. AOL launched services with the National Education Association, the American Federation of Teachers, National Geographic, the Smithsonian Institution, the Library of Congress, Pearson, Scholastic, ASCD, NSBA, NCTE, Discovery Networks, Turner Education Services (CNN Newsroom), NPR, The Princeton Review, Stanley Kaplan, Barron's, Highlights for Kids, the U.S. Department of Education, and many other education providers. AOL offered the first real-time homework help service (the Teacher Pager—1990; prior to this, AOL provided homework help bulletin boards), the first service by children, for children (Kids Only Online, 1991), the first online service for parents (the Parents Information Network, 1991), the first online courses (1988), the first omnibus service for teachers (the Teachers' Information Network, 1990), the first online exhibit (Library of Congress, 1991), the first parental controls, and many other online education firsts. AOL purchased search engine WebCrawler in 1995, but sold it to Excite the following year; the deal made Excite the sole search and directory service on AOL. After the deal closed in March 1997, AOL launched its own branded search engine, based on Excite, called NetFind. This was renamed to AOL Search in 1999. AOL charged its users an hourly fee until December 1996, when the company changed to a flat monthly rate of $19.95. During this time, AOL connections were flooded with users trying to connect, and many canceled their accounts due to constant busy signals. A commercial was made featuring Steve Case telling people AOL was working day and night to fix the problem. Within three years, AOL's user base grew to 10 million people. In 1995, AOL was headquartered at 8619 Westwood Center Drive in the Tysons Corner CDP in unincorporated Fairfax County, Virginia, near the Town of Vienna. AOL was quickly running out of room in October 1996 for its network at the Fairfax County campus. In mid-1996, AOL moved to 22000 AOL Way in Dulles, unincorporated Loudoun County, Virginia to provide room for future growth. In a five-year landmark agreement with the most popular operating system, AOL was bundled with Windows software. On March 31, 1996, the short-lived eWorld was purchased by AOL. In 1997, about half of all U.S. homes with Internet access had it through AOL. During this time, AOL's content channels, under Jason Seiken, including News, Sports, and Entertainment, experienced their greatest growth as AOL become the dominant online service internationally with more than 34 million subscribers. In November 1998, AOL announced it would acquire Netscape, best known for their web browser, in a major $4.2 billion deal. The deal closed on March 17, 1999. Another large acquisition in December 1999 was that of MapQuest, for $1.1 billion. In January 2000, as new broadband technologies were being rolled out around the New York City metropolitan area and elsewhere across the U.S., AOL and Time Warner announced plans to merge, forming AOL Time Warner, Inc. The terms of the deal called for AOL shareholders to own 55% of the new, combined company. The deal closed on January 11, 2001. The new company was led by executives from AOL, SBI, and Time Warner. Gerald Levin, who had served as CEO of Time Warner, was CEO of the new company. Steve Case served as chairman, J. Michael Kelly (from AOL) was the chief financial officer, Robert W. Pittman (from AOL) and Dick Parsons (from Time Warner) served as co-chief operating officers. In 2002, Jonathan Miller became CEO of AOL. The following year, AOL Time Warner dropped the "AOL" from its name. It was the largest merger in history when completed with the combined value of the companies at $360 billion. This value fell sharply, to as low as $120 billion, as markets repriced AOL's valuation as a pure internet firm more modestly when combined with the traditional media and cable business. This status did not last long, and the company's value rose again within three months. By the end of that year, the tide had turned against "pure" internet companies, with many collapsing under falling stock prices, and even the strongest companies in the field losing up to 75% of their market value. The decline continued though 2001, but even with the losses, AOL was among the internet giants that continued to outperform brick and mortar companies. In 2004, along with the launch of AOL 9.0 Optimized, AOL also made available the option of personalized greetings which would enable the user to hear his or her name while accessing basic functions and mail alerts, or while logging in or out. In 2005, AOL broadcast the Live 8 concert live over the Internet, and thousands of users downloaded clips of the concert over the following months. In late 2005, AOL released AOL Safety & Security Center, a bundle of McAfee Antivirus, CA anti-spyware, and proprietary firewall and phishing protection software. News reports in late 2005 identified companies such as Yahoo!, Microsoft, and Google as candidates for turning AOL into a joint venture. Those plans were abandoned when it was revealed on December 20, 2005, that Google would purchase a 5% share of AOL for $1 billion. 2006–2009: rebranding and decline On April 3, 2006, AOL announced that it would retire the full name America Online. The official name of the service became AOL, and the full name of the Time Warner subdivision became AOL LLC. On June 8, 2006, AOL offered a new program called AOL Active Security Monitor, a diagnostic tool to monitor and rate PC security status, and recommended additional security software from AOL or Download.com. Two months later, AOL released AOL Active Virus Shield, a free product developed by Kaspersky Lab, that did not require an AOL account, only an internet email address. The ISP side of AOL UK was bought by Carphone Warehouse in October 2006 to take advantage of its 100,000 LLU customers, making Carphone Warehouse the largest LLU provider in the UK. In August 2006, AOL announced that it would offer email accounts and software previously available only to its paying customers, provided that users accessed AOL or AOL.com through an access method not owned by AOL (otherwise known as "third party transit", "bring your own access" or "BYOA"). The move was designed to reduce costs associated with the "walled garden" business model by reducing usage of AOL-owned access points and shifting members with high-speed internet access from client-based usage to the more lucrative advertising provider AOL.com. The change from paid to free access was also designed to slow the rate at which members canceled their accounts and defected to Microsoft Hotmail, Yahoo! or other free email providers. The other free services included: AIM (AOL Instant Messenger) AOL Video, which featured professional content and allowed users to upload videos. AOL Local, comprising its CityGuide, Yellow Pages and Local Search services to help users find local information like restaurants, local events, and directory listings. AOL News AOL My eAddress, a custom domain name for email addresses. These email accounts could be accessed in a manner similar to those of other AOL and AIM email accounts. Xdrive, which allowed users to back up files over the Internet. It was acquired by AOL on August 4, 2005, and closed on December 31, 2008. It offered a free 5 GB account (free online file storage) to anyone with an AOL screenname. Xdrive also provided remote backup services and 50 GB of storage for $9.95 per month. Also in August, AOL informed its U.S. customers of an increase in the price of its dial-up access to $25.90. The increase was part of an effort to migrate the service's remaining dial-up users to broadband, as the increased price was the same as that of its monthly DSL access. However, AOL subsequently began offering unlimited dial-up access for $9.95 a month. On November 16, 2006, Randy Falco succeeded Jonathan Miller as CEO. In December 2006, AOL closed its last remaining call center in the United States, "taking the America out of America Online," according to industry pundits. Service centers based in India and the Philippines continue to provide customer support and technical assistance to subscribers. On September 17, 2007, AOL announced the relocation of one of its corporate headquarters from Dulles, Virginia to New York City and the combination of its advertising units into a new subsidiary called Platform A. This action followed several advertising acquisitions, most notably Advertising.com, and highlighted the company's new focus on advertising-driven business models. AOL management stressed that "significant operations" would remain in Dulles, which included the company's access services and modem banks. In October 2007, AOL announced the relocation of its other headquarters from Loudoun County, Virginia to New York City, while continuing to operate its Virginia offices. As part of the move to New York and the restructuring of responsibilities at the Dulles headquarters complex after the Reston move, Falco announced on October 15, 2007, plans to lay off 2,000 employees worldwide by the end of 2007, beginning "immediately." The result was a layoff of approximately 40% of AOL's employees. Most compensation packages associated with the October 2007 layoffs included a minimum of 120 days of severance pay, 60 of which were offered in lieu of the 60-day advance notice requirement by provisions of the 1988 federal WARN Act. By November 2007, AOL's customer base had been reduced to 10.1 million subscribers, slightly more than the number of subscribers of Comcast and AT&T Yahoo!. According to Falco, as of December 2007, the conversion rate of accounts from paid access to free access was more than 80%. On January 3, 2008, AOL announced the closing of its Reston, Virginia data center, which was sold to CRG West. On February 6, Time Warner CEO Jeff Bewkes announced that Time Warner would divide AOL's internet-access and advertising businesses, with the possibility of later selling the internet-access division. On March 13, 2008, AOL purchased the social networking site Bebo for $850 million (£417 million). On July 25, AOL announced that it was shuttering Xdrive, AOL Pictures and BlueString to save on costs and focus on its core advertising business. AOL Pictures was closed on December 31. On October 31, AOL Hometown (a web-hosting service for the websites of AOL customers) and the AOL Journal blog hosting service were eliminated. 2009–2015: As a digital media company On March 12, 2009, Tim Armstrong, formerly with Google, was named chairman and CEO of AOL. On May 28, Time Warner announced that it would position AOL as an independent company after Google's shares ceased at the end of the fiscal year. On November 23, AOL unveiled a new brand identity with the wordmark "Aol." superimposed onto canvases created by commissioned artists. The new identity, designed by Wolff Olins, was integrated with all of AOL's services on December 10, the date upon which AOL traded independently for the first time since the Time Warner merger on the New York Stock Exchange under the symbol AOL. On April 6, 2010, AOL announced plans to shutter or sell Bebo. On June 16, the property was sold to Criterion Capital Partners for an undisclosed amount, believed to be approximately $10 million. In December, AIM eliminated access to AOL chat rooms, noting a marked decline in usage in recent months. Under Armstrong's leadership, AOL followed a new business direction marked by a series of acquisitions. It announced the acquisition of Patch Media, a network of community-specific news and information sites focused on towns and communities. On September 28, 2010, at the San Francisco TechCrunch Disrupt Conference, AOL signed an agreement to acquire TechCrunch. On December 12, 2010, AOL acquired about.me, a personal profile and identity platform, four days after the platform's public launch. On January 31, 2011, AOL announced the acquisition of European video distribution network goviral. In March 2011, AOL acquired HuffPost for $315 million. Shortly after the acquisition was announced, Huffington Post co-founder Arianna Huffington replaced AOL content chief David Eun, assuming the role of president and editor-in-chief of the AOL Huffington Post Media Group. On March 10, AOL announced that it would cut approximately 900 workers following the HuffPost acquisition. On September 14, 2011, AOL formed a strategic ad-selling partnership with two of its largest competitors, Yahoo and Microsoft. The three companies would begin selling inventory on each others' sites. The strategy was designed to help the companies compete with Google and advertising networks. On February 28, 2012, AOL partnered with PBS to launch MAKERS, a digital documentary series focusing on high-achieving women in industries perceived as male-dominated such as war, comedy, space, business, Hollywood and politics. Subjects for MAKERS episodes have included Oprah Winfrey, Hillary Clinton, Sheryl Sandberg, Martha Stewart, Indra Nooyi, Lena Dunham and Ellen DeGeneres. On March 15, 2012, AOL announced the acquisition of Hipster, a mobile photo-sharing app, for an undisclosed amount. On April 9, 2012, AOL announced a deal to sell 800 patents to Microsoft for $1.056 billion. The deal included a perpetual license for AOL to use the patents. In April, AOL took several steps to expand its ability to generate revenue through online video advertising. The company announced that it would offer gross rating point (GRP) guarantee for online video, mirroring the television-ratings system and guaranteeing audience delivery for online-video advertising campaigns bought across its properties. This announcement came just days before the Digital Content NewFront (DCNF) a two-week event held by AOL, Google, Hulu, Microsoft, Vevo and Yahoo to showcase the participating sites' digital video offerings. The DCNF was conducted in advance of the traditional television upfronts in the hope of diverting more advertising money into the digital space. On April 24, the company launched the AOL On network, a single website for its video output. In February 2013, AOL reported its fourth quarter revenue of $599.5 million, its first growth in quarterly revenue in eight years. In August 2013, Armstrong announced that Patch Media would scale back or sell hundreds of its local news sites. Not long afterward, layoffs began, with up to 500 out of 1,100 positions initially impacted. On January 15, 2014, Patch Media was spun off, and majority ownership was held by Hale Global. By the end of 2014, AOL controlled 0.74% of the global advertising market, well behind industry leader Google's 31.4%. On January 23, 2014, AOL acquired Gravity, a software startup that tracked users' online behavior and tailored ads and content based on their interests, for $83 million. The deal, which included approximately 40 Gravity employees and the company's personalization technology, was Armstrong's fourth-largest deal since taking command in 2009. Later that year, AOL acquired Vidible, a company that developed technology to help websites run video content from other publishers, and help video publishers sell their content to these websites. The deal, which was announced December 1, 2014, was reportedly worth roughly $50 million. On July 16, 2014, AOL earned an Emmy nomination for the AOL original series The Future Starts Here in the News and Documentary category. This came days after AOL earned its first Primetime Emmy Award nomination and win for Park Bench with Steve Buscemi in the Outstanding Short Form Variety Series. Created and hosted by Tiffany Shlain, the series focused on humans' relationship with technology and featured episodes such as "The Future of Our Species," "Why We Love Robots" and "A Case for Optimism." 2015–2021: division of Verizon On May 12, 2015, Verizon announced plans to buy AOL for $50 per share in a deal valued at $4.4 billion. The transaction was completed on June 23. Armstrong, who continued to lead the firm following regulatory approval, called the deal the logical next step for AOL. "If you look forward five years, you're going to be in a space where there are going to be massive, global-scale networks, and there's no better partner for us to go forward with than Verizon." he said. "It's really not about selling the company today. It's about setting up for the next five to 10 years." Analyst David Bank said he thought the deal made sense for Verizon. The deal will broaden Verizon's advertising sales platforms and increase its video production ability through websites such as HuffPost, TechCrunch, and Engadget. However, Craig Moffett said it was unlikely the deal would make a big difference to Verizon's bottom line. AOL had about two million dial-up subscribers at the time of the buyout. The announcement caused AOL's stock price to rise 17%, while Verizon's stock price dropped slightly. Shortly before the Verizon purchase, on April 14, 2015, AOL launched ONE by AOL, a digital marketing programmatic platform that unifies buying channels and audience management platforms to track and optimize campaigns over multiple screens. Later that year, on September 15, AOL expanded the product with ONE by AOL: Creative, which is geared towards creative and media agencies to similarly connect marketing and ad distribution efforts. On May 8, 2015, AOL reported its first-quarter revenue of $625.1 million, $483.5 million of which came from advertising and related operations, marking a 7% increase from Q1 2014. Over that year, the AOL Platforms division saw a 21% increase in revenue, but a drop in adjusted OIBDA due to increased investments in the company's video and programmatic platforms. On June 29, 2015, AOL announced a deal with Microsoft to take over the majority of its digital advertising business. Under the pact, as many as 1,200 Microsoft employees involved with the business will be transferred to AOL, and the company will take over the sale of display, video, and mobile ads on various Microsoft platforms in nine countries, including Brazil, Canada, the United States, and the United Kingdom. Additionally, Google Search will be replaced on AOL properties with Bing—which will display advertising sold by Microsoft. Both advertising deals are subject to affiliate marketing revenue sharing. On July 22, 2015, AOL received two News and Documentary Emmy nominations, one for MAKERS in the Outstanding Historical Programming category, and the other for True Trans With Laura Jane Grace, which documented the story of Laura Jane Grace, a transgender musician best known as the founder, lead singer, songwriter and guitarist of the punk rock band Against Me!, and her decision to come out publicly and overall transition experience. On September 3, 2015, AOL agreed to buy Millennial Media for $238 million. On October 23, 2015, AOL completed the acquisition. On October 1, 2015, Go90, a free ad-supported mobile video service aimed at young adult and teen viewers that Verizon owns and AOL oversees and operates launched its content publicly after months of beta testing. The initial launch line-up included content from Comedy Central, HuffPost, Nerdist News, Univision News, Vice, ESPN and MTV. On April 20, 2016, AOL acquired virtual reality studio RYOT to bring immersive 360 degree video and VR content to HuffPost's global audience across desktop, mobile, and apps. In July 2016, Verizon Communications announced its intent to purchase the core internet business of Yahoo!. Verizon merged AOL with Yahoo into a new company called "Oath Inc.", which in January 2019 rebranded itself as Verizon Media. In April 2018, Oath Inc. sold Moviefone to MoviePass Parent Helios and Matheson Analytics. In November 2020 the Huffington Post was sold to BuzzFeed in a stock deal. 2021–present: Apollo Global Management On May 3, 2021, Verizon announced it would sell 90 percent of its Verizon Media division to Apollo Global Management for $5 billion. The division became the second incarnation of Yahoo! Inc. Products and services Content As of September 1, 2021, the following media brands became subsidiary of AOL's parent Yahoo Inc. Engadget Autoblog TechCrunch Built by Girls AOL's content contributors consists of over 20,000 bloggers, including politicians, celebrities, academics, and policy experts, who contribute on a wide range of topics making news. In addition to mobile-optimized web experiences, AOL produces mobile applications for existing AOL properties like Autoblog, Engadget, The Huffington Post, TechCrunch, and products such as Alto, Pip, and Vivv. Advertising AOL has a global portfolio of media brands and advertising services across mobile, desktop, and TV. Services include brand integration and sponsorships through its in-house branded content arm, Partner Studio by AOL, as well as data and programmatic offerings through ad technology stack, ONE by AOL. AOL acquired a number of businesses and technologies help to form ONE by AOL. These acquisitions included AdapTV in 2013 and Convertro, Precision Demand, and Vidible in 2014. ONE by AOL is further broken down into ONE by AOL for Publishers (formerly Vidible, AOL On Network and Be On for Publishers) and ONE by AOL for Advertisers, each of which have several sub-platforms. On September 10, 2018, AOL's parent company Oath consolidated BrightRoll, One by AOL and Yahoo Gemini to 'simplify' adtech service by launching a single advertising proposition dubbed Oath Ad Platforms, now Yahoo! Ad Tech. Membership AOL offers a range of integrated products and properties including communication tools, mobile apps and services and subscription packages. In 2017, before the discontinuation of AIM, "billions of messages" were sent "daily" on it and AOL's other chat services. Dial-up Internet access – While 2.1 million people still used AOL's dial-up service as recently as 2015, only a few thousand were still subscribed as of 2021. AOL Mail – AOL Mail is AOL's proprietary email client. It is fully integrated with AIM and links to news headlines on AOL content sites. AOL Instant Messenger (AIM) – was AOL's proprietary instant-messaging tool. It was released in 1997. It lost market share to competition in the instant messenger market such as Google Chat, Facebook Messenger, and Skype. It also included a video-chat service, AV by AIM. On December 15, 2017, AOL discontinued AIM. AOL Plans – AOL Plans offers three online safety and assistance tools: ID protection, data security and a general online technical assistance service. AOL Desktop AOL Desktop is an internet suite produced by AOL from 2007 that integrates a web browser, a media player and an instant messenger client. Version 10.X was based on AOL OpenRide, it is an upgrade from such. The macOS version is based on WebKit. AOL Desktop version 10.X was different from previous AOL browsers and AOL Desktop versions. Its features are focused on web browsing as well as email. For instance, one does not have to sign into AOL in order to use it as a regular browser. In addition, non-AOL email accounts can be accessed through it. Primary buttons include "MAIL", "IM", and several shortcuts to various web pages. The first two require users to sign in, but the shortcuts to web pages can be used without authentication. AOL Desktop version 10.X was late marked as unsupported in favor of supporting the AOL Desktop 9.X versions. Version 9.8 was released, replacing the Internet Explorer components of the internet browser with CEF (Chromium Embedded Framework) to give users an improved web browsing experience closer to that of Chrome. Version 11 of AOL Desktop, was a total rewrite but maintained a similar user interface to the previous 9.8.X series of releases. In 2017, a new paid version called AOL Desktop Gold was released, available for $4.99 per month after trial. It replaced the previous free version. After the shutdown of AIM in 2017, AOL's original chat rooms continued to be accessible through AOL Desktop Gold, and some rooms remained active during peak hours. That chat system was shut down on December 15, 2020. In addition to AOL Desktop, the company also offered a browser toolbar Mozilla plug-in, AOL Toolbar, for several web browsers that provided quick access to AOL services. The toolbar was available from 2007 until 2018. Criticism In its earlier incarnation as a "walled garden" community and service provider, AOL received criticism for its community policies, terms of service, and customer service. Prior to 2006, AOL was known for its direct mailing of CD-ROMs and 3.5-inch floppy disks containing its software. The disks were distributed in large numbers; at one point, half of the CDs manufactured worldwide had AOL logos on them. The marketing tactic was criticized for its environmental cost, and AOL CDs were recognized as PC Worlds most annoying tech product. Community leaders AOL used a system of volunteers to moderate its chat rooms, forums and user communities. The program dated back to AOL's early days, when it charged by the hour for access and one of its highest billing services was chat. AOL provided free access to community leaders in exchange for moderating the chat rooms, and this effectively made chat very cheap to operate, and more lucrative than AOL's other services of the era. There were 33,000 community leaders in 1996. All community leaders received hours of training and underwent a probationary period. While most community leaders moderated chat rooms, some ran AOL communities and controlled their layout and design, with as much as 90% of AOL's content being created or overseen by community managers until 1996. By 1996, ISPs were beginning to charge flat rates for unlimited access, which they could do at a profit because they only provided internet access. Even though AOL would lose money with such a pricing scheme, it was forced by market conditions to offer unlimited access in October 1996. In order to return to profitability, AOL rapidly shifted its focus from content creation to advertising, resulting in less of a need to carefully moderate every forum and chat room to keep users willing to pay by the minute to remain connected. After unlimited access, AOL considered scrapping the program entirely, but continued it with a reduced number of community leaders, with scaled-back roles in creating content. Although community leaders continued to receive free access, after 1996 they were motivated more by the prestige of the position and the access to moderator tools and restricted areas within AOL. By 1999, there were over 15,000 volunteers in the program. In May 1999, two former volunteers filed a class-action lawsuit alleging AOL violated the Fair Labor Standards Act by treating volunteers like employees. Volunteers had to apply for the position, commit to working for at least three to four hours a week, fill out timecards and sign a non-disclosure agreement. On July 22, AOL ended its youth corps, which consisted of 350 underage community leaders. At this time, the United States Department of Labor began an investigation into the program, but it came to no conclusions about AOL's practices. AOL ended its community leader program on June 8, 2005. The class action lawsuit dragged on for years, even after AOL ended the program and AOL declined as a major internet company. In 2010, AOL finally agreed to settle the lawsuit for $15 million. The community leader program was found to be an example of co-production in a 2009 article in International Journal of Cultural Studies. Billing disputes AOL has faced a number of lawsuits over claims that it has been slow to stop billing customers after their accounts have been canceled, either by the company or the user. In addition, AOL changed its method of calculating used minutes in response to a class action lawsuit. Previously, AOL would add 15 seconds to the time a user was connected to the service and round up to the next whole minute (thus, a person who used the service for 12 minutes and 46 seconds would be charged for 14 minutes). AOL claimed this was to account for sign on/sign off time, but because this practice was not made known to its customers, the plaintiffs won (some also pointed out that signing on and off did not always take 15 seconds, especially when connecting via another ISP). AOL disclosed its connection-time calculation methods to all of its customers and credited them with extra free hours. In addition, the AOL software would notify the user of exactly how long they were connected and how many minutes they were being charged. AOL was sued by the Ohio Attorney General in October 2003 for improper billing practices. The case was settled on June 8, 2005. AOL agreed to resolve any consumer complaints filed with the Ohio AG's office. In December 2006, AOL agreed to provide restitution to Florida consumers to settle the case filed against them by the Florida Attorney General. Account cancellation Many customers complained that AOL personnel ignored their demands to cancel service and stop billing. In response to approximately 300 consumer complaints, the New York Attorney General's office began an inquiry of AOL's customer service policies. The investigation revealed that the company had an elaborate scheme for rewarding employees who purported to retain or "save" subscribers who had called to cancel their Internet service. In many instances, such retention was done against subscribers' wishes, or without their consent. Under the scheme, customer service personnel received bonuses worth tens of thousands of dollars if they could successfully dissuade or "save" half of the people who called to cancel service. For several years, AOL had instituted minimum retention or "save" percentages, which consumer representatives were expected to meet. These bonuses, and the minimum "save" rates accompanying them, had the effect of employees not honoring cancellations, or otherwise making cancellation unduly difficult for consumers. On August 24, 2005, America Online agreed to pay $1.25 million to the state of New York and reformed its customer service procedures. Under the agreement, AOL would no longer require its customer service representatives to meet a minimum quota for customer retention in order to receive a bonus. However the agreement only covered people in the state of New York. On June 13, 2006, Vincent Ferrari documented his account cancellation phone call in a blog post, stating he had switched to broadband years earlier. In the recorded phone call, the AOL representative refused to cancel the account unless the 30-year-old Ferrari explained why AOL hours were still being recorded on it. Ferrari insisted that AOL software was not even installed on the computer. When Ferrari demanded that the account be canceled regardless, the AOL representative asked to speak with Ferrari's father, for whom the account had been set up. The conversation was aired on CNBC. When CNBC reporters tried to have an account on AOL cancelled, they were hung up on immediately and it ultimately took more than 45 minutes to cancel the account. On July 19, 2006, AOL's entire retention manual was released on the Internet. On August 3, 2006, Time Warner announced that the company would be dissolving AOL's retention centers due to its profits hinging on $1 billion in cost cuts. The company estimated that it would lose more than six million subscribers over the following year. Direct marketing of disks Prior to 2006, AOL often sent unsolicited mass direct mail of 3" floppy disks and CD-ROMs containing their software. They were the most frequent user of this marketing tactic, and received criticism for the environmental cost of the campaign. According to PC World, in the 1990s "you couldn't open a magazine (PC World included) or your mailbox without an AOL disk falling out of it". The mass distribution of these disks was seen as wasteful by the public and led to protest groups. One such was No More AOL CDs, a web-based effort by two IT workers to collect one million disks with the intent to return the disks to AOL. The website was started in August 2001, and an estimated 410,176 CDs were collected by August 2007 when the project was shut down. Software In 2000, AOL was served with an $8 billion lawsuit alleging that its AOL 5.0 software caused significant difficulties for users attempting to use third-party Internet service providers. The lawsuit sought damages of up to $1000 for each user that had downloaded the software cited at the time of the lawsuit. AOL later agreed to a settlement of $15 million, without admission of wrongdoing. The AOL software then was given a feature called AOL Dialer, or AOL Connect on . This feature allowed users to connect to the ISP without running the full interface. This allowed users to use only the applications they wish to use, especially if they do not favor the AOL Browser. AOL 9.0 was once identified by Stopbadware as being under investigation for installing additional software without disclosure, and modifying browser preferences, toolbars, and icons. However, as of the release of AOL 9.0 VR (Vista Ready) on January 26, 2007, it was no longer considered badware due to changes AOL made in the software. Usenet newsgroups When AOL gave clients access to Usenet in 1993, they hid at least one newsgroup in standard list view: alt.aol-sucks. AOL did list the newsgroup in the alternative description view, but changed the description to "Flames and complaints about America Online". With AOL clients swarming Usenet newsgroups, the old, existing user base started to develop a strong distaste for both AOL and its clients, referring to the new state of affairs as Eternal September. AOL discontinued access to Usenet on June 25, 2005. No official details were provided as to the cause of decommissioning Usenet access, except providing users the suggestion to access Usenet services from a third-party, Google Groups. AOL then provided community-based message boards in lieu of Usenet. Terms of Service (TOS) AOL has a detailed set of guidelines and expectations for users on their service, known as the Terms of Service (TOS, also known as Conditions of Service, or COS in the UK). It is separated into three different sections: Member Agreement, Community Guidelines and Privacy Policy. All three agreements are presented to users at time of registration and digital acceptance is achieved when they access the AOL service. During the period when volunteer chat room hosts and board monitors were used, chat room hosts were given a brief online training session and test on Terms of Service violations. There have been many complaints over rules that govern an AOL user's conduct. Some users disagree with the TOS, citing the guidelines are too strict to follow coupled with the fact the TOS may change without users being made aware. A considerable cause for this was likely due to alleged censorship of user-generated content during the earlier years of growth for AOL. Certified email In early 2005, AOL stated its intention to implement a certified email system called Goodmail, which will allow companies to send email to users with whom they have pre-existing business relationships, with a visual indication that the email is from a trusted source and without the risk that the email messages might be blocked or stripped by spam filters. This decision drew fire from MoveOn, which characterized the program as an "email tax", and the Electronic Frontier Foundation (EFF), which characterized it as a shakedown of non-profits. A website called Dearaol.com was launched, with an online petition and a blog that garnered hundreds of signatures from people and organizations expressing their opposition to AOL's use of Goodmail. Esther Dyson defended the move in an editorial in The New York Times, saying "I hope Goodmail succeeds, and that it has lots of competition. I also think it and its competitors will eventually transform into services that more directly serve the interests of mail recipients. Instead of the fees going to Goodmail and AOL, they will also be shared with the individual recipients." Tim Lee of the Technology Liberation Front posted an article that questioned the Electronic Frontier Foundation's adopting a confrontational posture when dealing with private companies. Lee's article cited a series of discussions on Declan McCullagh's Politechbot mailing list on this subject between the EFF's Danny O'Brien and antispammer Suresh Ramasubramanian, who has also compared the EFF's tactics in opposing Goodmail to tactics used by Republican political strategist Karl Rove. SpamAssassin developer Justin Mason posted some criticism of the EFF's and Moveon's "going overboard" in their opposition to the scheme. The dearaol.com campaign lost momentum and disappeared, with the last post to the now defunct dearaol.com blog—"AOL starts the shakedown" being made on May 9, 2006. Comcast, who also used the service, announced on its website that Goodmail had ceased operations and as of February 4, 2011, they no longer used the service. Search data On August 4, 2006, AOL released a compressed text file on one of its websites containing 20 million search keywords for over 650,000 users over a 3-month period between March 1, 2006 and May 31, intended for research purposes. AOL pulled the file from public access by August 7, but not before its wide distribution on the Internet by others. Derivative research, titled A Picture of Search was published by authors Pass, Chowdhury and Torgeson for The First International Conference on Scalable Information Systems. The data were used by websites such as AOLstalker for entertainment purposes, where users of AOLstalker are encouraged to judge AOL clients based on the humorousness of personal details revealed by search behavior. User list exposure In 2003, Jason Smathers, an AOL employee, was convicted of stealing America Online's 92 million screen names and selling them to a known spammer. Smathers pled guilty to conspiracy charges in 2005. Smathers pled guilty to violations of the US CAN-SPAM Act of 2003. He was sentenced in August 2005 to 15 months in prison; the sentencing judge also recommended Smathers be forced to pay $84,000 in restitution, triple the $28,000 that he sold the addresses for. AOL's Computer Checkup "scareware" On February 27, 2012, a class action lawsuit was filed against Support.com, Inc. and partner AOL, Inc. The lawsuit alleged Support.com and AOL's Computer Checkup "scareware" (which uses software developed by Support.com) misrepresented that their software programs would identify and resolve a host of technical problems with computers, offered to perform a free "scan," which often found problems with users' computers. The companies then offered to sell software—for which AOL allegedly charged $4.99 a month and Support.com $29—to remedy those problems. Both AOL, Inc. and Support.com, Inc. settled on May 30, 2013, for $8.5 million. This included $25.00 to each valid class member and $100,000 each to Consumer Watchdog and the Electronic Frontier Foundation. Judge Jacqueline Scott Corley wrote: "Distributing a portion of the [funds] to Consumer Watchdog will meet the interests of the silent class members because the organization will use the funds to help protect consumers across the nation from being subject to the types of fraudulent and misleading conduct that is alleged here," and "EFF's mission includes a strong consumer protection component, especially in regards to online protection." AOL continues to market Computer Checkup. NSA PRISM program Following media reports about PRISM, NSA's massive electronic surveillance program, in June 2013, several technology companies were identified as participants, including AOL. According to leaks of said program, AOL joined the PRISM program in 2011. Hosting of user profiles changed, then discontinued At one time, most AOL users had an online "profile" hosted by the AOL Hometown service. When AOL Hometown was discontinued, users had to create a new profile on Bebo. This was an unsuccessful attempt to create a social network that would compete with Facebook. When the value of Bebo decreased to a tiny fraction of the $850 million AOL paid for it, users were forced to recreate their profiles yet again, on a new service called AOL Lifestream. AOL took the decision to shut down Lifestream on February 24, 2017, and gave users one month's notice to save photos and videos that had been uploaded to Lifestream. Following the shutdown, AOL no longer provides any option for hosting user profiles. During the Hometown/Bebo/Lifestream era, another user's profile could be displayed by clicking the "Buddy Info" button in the AOL Desktop software. After the shutdown of Lifestream, this was no longer supported, but opened to the AIM home page (www.aim.com), which also became defunct, redirecting to AOL's home page. See also Adrian Lamo – Inside-AOL.com AOHell Comparison of webmail providers David Shing Dot-com bubble List of acquisitions by AOL List of S&P 400 companies Live365 Truveo References External links 1983 establishments in the United States 2015 mergers and acquisitions Companies based in Dulles, Virginia Companies based in New York City Companies formerly listed on the New York Stock Exchange Companies in the PRISM network Former WarnerMedia subsidiaries Internet properties established in 1983 Internet properties established in 2009 Internet service providers of the United States Internet services supporting OpenID Pre–World Wide Web online services Telecommunications companies established in 1983 Telecommunications companies established in 2009 Yahoo! Web portals Web service providers	18
AV, Av or A.V. may refer to: Arts and entertainment The abbreviation of audiovisual, possessing both a sound and a visual component A.V. (film), a 2005 Hong Kong film directed by Pang Ho-Cheung Adult video, an alternative name/synonym of a pornographic film AV The Hunt, a 2020 Turkish thriller film directed by Emre Akay Businesses and organizations America Votes, an American 501(c)4 organization that promotes progressive causes Ambulance Victoria, an ambulance service operated in the Australian state of Victoria Anonymous for the Voiceless, a grassroots animal rights organization specializing in street activism Aston Villa F.C., an English professional football club AV Akademikerverlag GmbH & Co. KG an imprint of the German group VDM Publishing (now OmniScriptum) Avaya, a technology company formerly listed on the New York Stock Exchange with symbol "AV" Avianca (IATA airline code AV) Aviva, British insurance company, listed on the New York Stock Exchange and London Stock Exchange as "AV" AeroVironment, manufacturer of unmanned military aircraft and systems Amusement Vision, the former name of Ryu Ga Gotoku Studio People Av or Avrum Gross (1936–2018), American lawyer and Attorney General of Alaska Av or Avrom Isaacs (1926–2016), Canadian art dealer Av Westin (1929–2022), American television producer Places Anguilla (FIPS country code and obsolete NATO diagram AV) Antelope Valley, a valley in Southern California Province of Avellino, a province of Italy Science and technology Anatomy and medicine Aerobic vaginitis, vaginal infection associated with overgrowth of aerobic bacteria Arteriovenous (disambiguation) Atrioventricular (disambiguation) Electronics and computing Access violation, a computer software error Age verification, system for checking a user's age Antivirus software, used to prevent, detect and remove malicious software Audio and video connector, a cable between two devices Analog video AV Linux, a Linux-based operating system Fluid dynamics Annular velocity, speed of the drilling fluid's movement in a column called an annulus in oil wells Apparent viscosity, shear stress divided by shear rate Vehicles AV (cyclecar), a British cyclecar manufactured between 1919 and 1924 Bavarian A V, an 1853 steam locomotive model AV, the designation for seaplane tender in the United States Navy's ship classification system Autonomous vehicles Other uses in science and technology A-type main-sequence star, in astronomy, abbreviated A V Aperture value mode, setting on photo cameras that allows to choose a specific aperture value Other uses Alternative vote, an electoral system used to elect a single winner from a field of more than two candidates Approval voting, a non-ranking vote system Authorised Version of the Bible (also known as King James Version) Av, a month in the Hebrew calendar av, the Avar language's ISO 639-1 code Av. or Ave, an abbreviation for Avenue (landscape) Ꜹ or AV from Latin aurum (avrvm), a numismatic abbreviation for "gold" A.V., the putative mark of ébéniste Adam Weisweiler Aviation, abbreviated Av in military use Andhra Vidyalaya College, aka A. V. College, a school in Hyderabad, India See also 2023 AV, an asteroid that passed closed to the Earth in 2023 A5 (disambiguation) α5 (disambiguation) AV idol, a type of Japanese porn star Masculine given names Hypocorisms	6
In chemistry, amines (, ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines). Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (). The substituent is called an amino group. Compounds with a nitrogen atom attached to a carbonyl group, thus having the structure , are called amides and have different chemical properties from amines. Classification of amines Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring. Amines, alkyl and aryl alike, are organized into three subcategories (see table) based on the number of carbon atoms adjacent to the nitrogen(how many hydrogen atoms of the ammonia molecule are replaced by hydrocarbon groups): Primary (1°) amines—Primary amines arise when one of three hydrogen atoms in ammonia is replaced by an alkyl or aromatic group. Important primary alkyl amines include, methylamine, most amino acids, and the buffering agent tris, while primary aromatic amines include aniline. Secondary (2°) amines—Secondary amines have two organic substituents (alkyl, aryl or both) bound to the nitrogen together with one hydrogen. Important representatives include dimethylamine, while an example of an aromatic amine would be diphenylamine. Tertiary (3°) amines—In tertiary amines, nitrogen has three organic substituents. Examples include trimethylamine, which has a distinctively fishy smell, and EDTA. A fourth subcategory is determined by the connectivity of the substituents attached to the nitrogen: *Cyclic amines—Cyclic amines are either secondary or tertiary amines. Examples of cyclic amines include the 3-membered ring aziridine and the six-membered ring piperidine. N-methylpiperidine and N-phenylpiperidine are examples of cyclic tertiary amines. It is also possible to have four organic substituents on the nitrogen. These species are not amines but are quaternary ammonium cations and have a charged nitrogen center. Quaternary ammonium salts exist with many kinds of anions. Naming conventions Amines are named in several ways. Typically, the compound is given the prefix "amino-" or the suffix "-amine". The prefix "N-" shows substitution on the nitrogen atom. An organic compound with multiple amino groups is called a diamine, triamine, tetraamine and so forth. Systematic names for some common amines: Physical properties Hydrogen bonding significantly influences the properties of primary and secondary amines. For example, methyl and ethyl amines are gases under standard conditions, whereas the corresponding methyl and ethyl alcohols are liquids. Amines possess a characteristic ammonia smell, liquid amines have a distinctive "fishy" and foul smell. The nitrogen atom features a lone electron pair that can bind H+ to form an ammonium ion R3NH+. The lone electron pair is represented in this article by a two dots above or next to the N. The water solubility of simple amines is enhanced by hydrogen bonding involving these lone electron pairs. Typically salts of ammonium compounds exhibit the following order of solubility in water: primary ammonium () > secondary ammonium () > tertiary ammonium (R3NH+). Small aliphatic amines display significant solubility in many solvents, whereas those with large substituents are lipophilic. Aromatic amines, such as aniline, have their lone pair electrons conjugated into the benzene ring, thus their tendency to engage in hydrogen bonding is diminished. Their boiling points are high and their solubility in water is low. Spectroscopic identification Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one. Structure Alkyl amines Alkyl amines characteristically feature tetrahedral nitrogen centers. C-N-C and C-N-H angles approach the idealized angle of 109°. C-N distances are slightly shorter than C-C distances. The energy barrier for the nitrogen inversion of the stereocenter is about 7 kcal/mol for a trialkylamine. The interconversion has been compared to the inversion of an open umbrella into a strong wind. Amines of the type NHRR' and NRR′R″ are chiral: the nitrogen center bears four substituents counting the lone pair. Because of the low barrier to inversion, amines of the type NHRR' cannot be obtained in optical purity. For chiral tertiary amines, NRR′R″ can only be resolved when the R, R', and R″ groups are constrained in cyclic structures such as N-substituted aziridines (quaternary ammonium salts are resolvable). Aromatic amines In aromatic amines ("anilines"), nitrogen is often nearly planar owing to conjugation of the lone pair with the aryl substituent. The C-N distance is correspondingly shorter. In aniline, the C-N distance is the same as the C-C distances. Basicity Like ammonia, amines are bases. Compared to alkali metal hydroxides, amines are weaker (see table for examples of conjugate acid Ka values). The basicity of amines depends on: The electronic properties of the substituents (alkyl groups enhance the basicity, aryl groups diminish it). The degree of solvation of the protonated amine, which includes steric hindrance by the groups on nitrogen. Electronic effects Owing to inductive effects, the basicity of an amine might be expected to increase with the number of alkyl groups on the amine. Correlations are complicated owing to the effects of solvation which are opposite the trends for inductive effects. Solvation effects also dominate the basicity of aromatic amines (anilines). For anilines, the lone pair of electrons on nitrogen delocalizes into the ring, resulting in decreased basicity. Substituents on the aromatic ring, and their positions relative to the amino group, also affect basicity as seen in the table. Solvation effects Solvation significantly affects the basicity of amines. N-H groups strongly interact with water, especially in ammonium ions. Consequently, the basicity of ammonia is enhanced by 1011 by solvation. The intrinsic basicity of amines, i.e. the situation where solvation is unimportant, has been evaluated in the gas phase. In the gas phase, amines exhibit the basicities predicted from the electron-releasing effects of the organic substituents. Thus tertiary amines are more basic than secondary amines, which are more basic than primary amines, and finally ammonia is least basic. The order of pKb's (basicities in water) does not follow this order. Similarly aniline is more basic than ammonia in the gas phase, but ten thousand times less so in aqueous solution. In aprotic polar solvents such as DMSO, DMF, and acetonitrile the energy of solvation is not as high as in protic polar solvents like water and methanol. For this reason, the basicity of amines in these aprotic solvents is almost solely governed by the electronic effects. Synthesis From alcohols Industrially significant alkyl amines are prepared from ammonia by alkylation with alcohols: ROH + NH3 -> RNH2 + H2O From alkyl and aryl halides Unlike the reaction of amines with alcohols the reaction of amines and ammonia with alkyl halides is used for synthesis in the laboratory: RX + 2 R'NH2 -> RR'NH + [RR'NH2]X In such reactions, which are more useful for alkyl iodides and bromides, the degree of alkylation is difficult to control such that one obtains mixtures of primary, secondary, and tertiary amines, as well as quaternary ammonium salts. Selectivity can be improved via the Delépine reaction, although this is rarely employed on an industrial scale. Selectivity is also assured in the Gabriel synthesis, which involves organohalide reacting with potassium phthalimide. Aryl halides are much less reactive toward amines and for that reason are more controllable. A popular way to prepare aryl amines is the Buchwald-Hartwig reaction. From alkenes Disubstituted alkenes react with HCN in the presence of strong acids to give formamides, which can be decarbonylated. This method, the Ritter reaction, is used industrially to produce tertiary amines such a tert-octylamine. Hydroamination of alkenes is also widely practiced. The reaction is catalyzed by zeolite-based solid acids. Reductive routes Via the process of hydrogenation, unsaturated N-containing functional groups are reduced to amines using hydrogen in the presence of a nickel catalyst. Suitable groups include nitriles, azides, imines including oximes, amides, and nitro. In the case of nitriles, reactions are sensitive to acidic or alkaline conditions, which can cause hydrolysis of the group. is more commonly employed for the reduction of these same groups on the laboratory scale. Many amines are produced from aldehydes and ketones via reductive amination, which can either proceed catalytically or stoichiometrically. Aniline () and its derivatives are prepared by reduction of the nitroaromatics. In industry, hydrogen is the preferred reductant, whereas, in the laboratory, tin and iron are often employed. Specialized methods Many methods exist for the preparation of amines, many of these methods being rather specialized. Reactions Alkylation, acylation, and sulfonation, etc. Aside from their basicity, the dominant reactivity of amines is their nucleophilicity. Most primary amines are good ligands for metal ions to give coordination complexes. Amines are alkylated by alkyl halides. Acyl chlorides and acid anhydrides react with primary and secondary amines to form amides (the "Schotten–Baumann reaction"). Similarly, with sulfonyl chlorides, one obtains sulfonamides. This transformation, known as the Hinsberg reaction, is a chemical test for the presence of amines. Because amines are basic, they neutralize acids to form the corresponding ammonium salts . When formed from carboxylic acids and primary and secondary amines, these salts thermally dehydrate to form the corresponding amides. Amines undergo sulfamation upon treatment with sulfur trioxide or sources thereof: R2NH + SO3 -> R2NSO3H Acid-base reactions Alkyl amines protonate near pH=7 to give alkylammonium derivative. Diazotization Amines reacts with nitrous acid to give diazonium salts. The alkyl diazonium salts are of little importance because they are too unstable. The most important members are derivatives of aromatic amines such as aniline ("phenylamine") (A = aryl or naphthyl): ANH2 + HNO2 + HX -> AN2+ + X- + 2 H2O Anilines and naphthylamines form more stable diazonium salts, which can be isolated in the crystalline form. Diazonium salts undergo a variety of useful transformations involving replacement of the group with anions. For example, cuprous cyanide gives the corresponding nitriles: AN2+ + Y- -> AY + N2 Aryldiazonium couple with electron-rich aromatic compounds such as a phenol to form azo compounds. Such reactions are widely applied to the production of dyes. Conversion to imines Imine formation is an important reaction. Primary amines react with ketones and aldehydes to form imines. In the case of formaldehyde (R' H), these products typically exist as cyclic trimers. RNH2 + R'_2C=O -> R'_2C=NR + H2O Reduction of these imines gives secondary amines: R'_2C=NR + H2 -> R'_2CH-NHR Similarly, secondary amines react with ketones and aldehydes to form enamines: R2NH + R'(R''CH2)C=O -> R''CH=C(NR2)R' + H2O Overview An overview of the reactions of amines is given below: Biological activity Amines are ubiquitous in biology. The breakdown of amino acids releases amines, famously in the case of decaying fish which smell of trimethylamine. Many neurotransmitters are amines, including epinephrine, norepinephrine, dopamine, serotonin, and histamine. Protonated amino groups () are the most common positively charged moieties in proteins, specifically in the amino acid lysine. The anionic polymer DNA is typically bound to various amine-rich proteins. Additionally, the terminal charged primary ammonium on lysine forms salt bridges with carboxylate groups of other amino acids in polypeptides, which is one of the primary influences on the three-dimensional structures of proteins. Amine hormones Hormones derived from the modification of amino acids are referred to as amine hormones. Typically, the original structure of the amino acid is modified such that a –COOH, or carboxyl, group is removed, whereas the −NH+3, or amine, group remains. Amine hormones are synthesized from the amino acids tryptophan or tyrosine. Application of amines Dyes Primary aromatic amines are used as a starting material for the manufacture of azo dyes. It reacts with nitrous acid to form diazonium salt, which can undergo coupling reaction to form an azo compound. As azo-compounds are highly coloured, they are widely used in dyeing industries, such as: Methyl orange Direct brown 138 Sunset yellow FCF Ponceau Drugs Most drugs and drug candidates contain amine functional groups: Chlorpheniramine is an antihistamine that helps to relieve allergic disorders due to cold, hay fever, itchy skin, insect bites and stings. Chlorpromazine is a tranquilizer that sedates without inducing sleep. It is used to relieve anxiety, excitement, restlessness or even mental disorder. Ephedrine and phenylephrine, as amine hydrochlorides, are used as decongestants. Amphetamine, methamphetamine, and methcathinone are psychostimulant amines that are listed as controlled substances by the US DEA. Thioridazine, an antipsychotic drug, is an amide which is believed to exhibit its antipsychotic effects, in part, due to its effects on other amides. Amitriptyline, imipramine, lofepramine and clomipramine are tricyclic antidepressants and tertiary amines. Nortriptyline, desipramine, and amoxapine are tricyclic antidepressants and secondary amines. (The tricyclics are grouped by the nature of the final amino group on the side chain.) Substituted tryptamines and phenethylamines are key basic structures for a large variety of psychedelic drugs. Opiate analgesics such as morphine, codeine, and heroin are tertiary amines. Gas treatment Aqueous monoethanolamine (MEA), diglycolamine (DGA), diethanolamine (DEA), diisopropanolamine (DIPA) and methyldiethanolamine (MDEA) are widely used industrially for removing carbon dioxide (CO2) and hydrogen sulfide (H2S) from natural gas and refinery process streams. They may also be used to remove CO2 from combustion gases and flue gases and may have potential for abatement of greenhouse gases. Related processes are known as sweetening. Epoxy resin curing agents Amines are often used as epoxy resin curing agents. These include dimethylethylamine, cyclohexylamine, and a variety of diamines such as 4,4 -diaminodicyclohexylmethane. Multifunctional amines such as tetraethylenepentamine and triethylenetetramine are also widely used in this capacity. The reaction proceeds by the lone pair of electrons on the amine nitrogen attacking the outermost carbon on the oxirane ring of the epoxy resin. This relieves ring strain on the epoxide and is the driving force of the reaction. Safety Low molecular weight simple amines, such as ethylamine, are only weakly toxic with between 100 and 1000 mg/kg. They are skin irritants, especially as some are easily absorbed through the skin. Amines are a broad class of compounds, and more complex members of the class can be extremely bioactive, for example strychnine. See also Acid-base extraction Amine value Amine gas treating Ammine Biogenic amine Ligand isomerism Official naming rules for amines as determined by the International Union of Pure and Applied Chemistry (IUPAC) References Further reading External links Synthesis of amines Factsheet, amines in food Functional groups	6
Acapulco de Juárez (), commonly called Acapulco ( , ; ), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has been a port since the early colonial period of Mexico's history. It is a port of call for shipping and cruise lines running between Panama and San Francisco, California, United States. The city of Acapulco is the largest in the state, far larger than the state capital Chilpancingo. Acapulco is also Mexico's largest beach and balneario resort city. Acapulco de Juárez is the municipal seat of the municipality of Acapulco. The city is one of Mexico's oldest beach resorts, coming into prominence in the 1940s through the 1960s as a getaway for Hollywood stars and millionaires. Acapulco was once a popular tourist resort, but due to a massive upsurge in gang violence and homicide numbers since 2014, Acapulco no longer attracts many foreign tourists, and most now only come from Mexico itself. It is both the ninth deadliest city in Mexico and the tenth-deadliest city in the world as of 2022; the US government has warned its citizens not to travel there. In 2016 there were 918 murders, and the homicide rate was one of the highest in the world: 103 in every 100,000. In September 2018 the city's entire police force was disarmed by the military, due to suspicions that it has been infiltrated by drug gangs. The resort area is divided into three parts: the north end of the bay and beyond is the "traditional" area, which encompasses the area from Parque Papagayo through the and onto the beaches of Caleta and Caletilla, the main part of the bay known as "" ('golden zone' in Spanish), where the famous in the mid-20th century vacationed, and the south end, "" ('diamond' in Spanish), which is dominated by newer luxury high-rise hotels and condominiums. The name "Acapulco" comes from Nahuatl language Aca-pōl-co, and means "where the reeds were destroyed or washed away" or "at the big reeds", which inspired the city's seal, which is an Aztec-type glyph showing two hands breaking reeds. The "de Juárez" was added to the official name in 1885 to honor Benito Juárez, former president of Mexico (1806–1872). The island and municipality of Capul, in the Philippines, derives its name from Acapulco. Acapulco was the eastern end of the trans-Pacific sailing route from Acapulco to Manila, in what was then a Spanish colony. History Pre-Columbian By the 8th century around the Acapulco Bay area, there was a small culture which would first be dominated by the Olmecs, then by a number of others during the pre-Hispanic period before it ended in the 1520s. At Acapulco Bay itself, there were two Olmec sites, one by Playa Larga and the other on a hill known as El Guitarrón. Olmec influence caused the small spread-out villages here to coalesce into larger entities and build ceremonial centers. Later, Teotihuacan influence came to the area via Cuernavaca and Chilpancingo. Then Mayan influence arrived from the Isthmus of Tehuantepec and through what is now Oaxaca. This history is known through the archaeological artifacts that have been found here, especially at Playa Hornos, Pie de la Cuesta, and Tambuco. In the 11th century, new waves of migration of Nahuas and Coixas came through here. These people were the antecedents of the Aztecs. In the later 15th century, after four years of military struggle, Acapulco became part of the Aztec Empire during the reign of Ahuizotl (1486–1502). It was annexed to a tributary province named Tepecuacuilco. However, this was only transitory, as the Aztecs could only establish an unorganized military post at the city's outskirts. The city was in territory under control of the Yopes, who continued defending it and living there until the arrival of the Spanish in the 1520s. 16th century There are two stories about how Acapulco bay was discovered by Europeans. The first states that two years after the Spanish conquest of the Aztec Empire, Hernán Cortés sent explorers west to find gold. The explorers had subdued this area after 1523, and Captain Saavedra Cerón was authorized by Cortés to found a settlement here. The other states that the bay was discovered on December 13, 1526, by a small ship named the El Tepache Santiago captained by Santiago Guevara. The first encomendero was established in 1525 at Cacahuatepec, which is still part of the modern Acapulco municipality. In 1531, a number of Spaniards, most notably Juan Rodriguez de Villafuerte, left the Oaxaca coast and founded the village of Villafuerte where the city of Acapulco now stands. Villafuerte was unable to subdue the local native peoples, and this eventually resulted in the Yopa Rebellion in the region of Cuautepec. Hernán Cortés was obligated to send Vasco Porcayo to negotiate with the indigenous people giving concessions. The province of Acapulco became the encomendero of Rodriguez de Villafuerte who received taxes in the form of cocoa, cotton and corn. Cortés established Acapulco as a major port by the early 1530s, with the first major road between Mexico City and the port constructed by 1531. The wharf, named Marqués, was constructed by 1533 between Bruja Point and Diamond Point. Soon after, the area was made an "alcadia" (major province or town). Spanish trade in the Far East would give Acapulco a prominent position in the economy of New Spain. In 1550 thirty Spanish families were sent to live here from Mexico City to have a permanent base of European residents. Galleons started arriving in Acapulco from Asia by 1565. Acapulco would become the second most important port, after Veracruz, due to its direct trade with the Philippines. This trade would focus on the yearly Manila-Acapulco Galleon trade, which was the nexus of all kinds of communications between New Spain, Europe and Asia. In 1573, the port was granted the monopoly of the Manila trade. 17th–19th centuries On January 25, 1614, a delegation led by samurai Hasekura Tsunenaga, which included over one hundred Japanese Christians as well as twenty-two samurai under the shōgun Tokugawa Ieyasu, arrived from Japan to Acapulco as part of a mission to form closer relations with Catholic Europe. A fight soon broke out in which a Japanese samurai stabbed a Spanish colonial soldier in Acapulco. This was witnessed and recorded by historian Chimalpahin, who was the grandson of an Aztec nobleman. Some of Tsunenaga's delegation would stay and marry with the locals. The galleon trade made its yearly run from the mid-16th century until the early 19th. The luxury items it brought to New Spain attracted the attention of English and Dutch pirates, such as Francis Drake, Henry Morgan and Thomas Cavendish, who called it "The Black Ship". A Dutch fleet invaded Acapulco in 1615, destroying much of the town before being driven off. The Fort of San Diego was built the following year to protect the port and the cargo of arriving ships. The fort was destroyed by an earthquake in 1776 and was rebuilt between 1778 and 1783. At the beginning of the 19th century, King Charles IV declared Acapulco a Ciudad Official and it became an essential part of the Spanish Crown. However, not long after, the Mexican War of Independence began. In 1810, José María Morelos y Pavón attacked and burnt down the city, after he defeated royalist commander Francisco Parés at the Battle of Tres Palos. The independence of Mexico in 1821 ended the run of the Manila Galleon. Acapulco's importance as a port recovered during the California Gold Rush in the mid-19th-century, with ships going to and coming from Panama stopping here. This city was besieged on 19 April 1854 by Antonio López de Santa Anna after Guerrero's leadership had rebelled by issuing the Plan de Ayutla. After an unsuccessful week of fighting, Santa Anna retreated. 20th century In 1911, revolutionary forces took over the main plaza of Acapulco. In 1920, the Prince of Wales (the future King Edward VIII) visited the area. Impressed by what he saw, he recommended the place to his compatriots in Europe, making it popular with the elite there. Much of the original hotel and trading infrastructure was built by a businessman named Albert B. Pullen from Corrigan, Texas, in the area now known as Old Acapulco. In 1933 Carlos Barnard started the first section of Hotel El Mirador, with 12 rooms on the cliffs of La Quebrada. Wolf Schoenborn purchased large amounts of undeveloped land and Albert Pullen built the Las Americas Hotel. In the mid-1940s, the first commercial wharf and warehouses were built. In the early 1950s, President Miguel Alemán Valdés upgraded the port's infrastructure, installing electrical lines, drainage systems, roads and the first highway to connect the port with Mexico City. The economy grew and foreign investment increased with it. During the 1950s, Acapulco became the fashionable place for millionaire Hollywood stars such as Elizabeth Taylor, Frank Sinatra, Eddie Fisher and Brigitte Bardot. The 1963 Hollywood movie Fun in Acapulco, starring Elvis Presley, is set in Acapulco although the filming took place in the United States. Former swing musician Teddy Stauffer, the so-called "Mister Acapulco", was a hotel manager ("Villa Vera", "Casablanca"), who attracted many celebrities to Acapulco. From a population of only 4,000 or 5,000 in the 1940s, by the early 1960s, Acapulco had a population of about 50,000. In 1958, the Diocese of Acapulco was created by Pope Pius XII. It became an archdiocese in 1983. During the 1960s and 1970s, new hotel resorts were built, and accommodation and transport were made cheaper. It was no longer necessary to be a millionaire to spend a holiday in Acapulco; the foreign and Mexican middle class could now afford to travel here. However, as more hotels were built in the south part of the bay, the old hotels of the 1950s lost their grandeur. For the 1968 Summer Olympics in neighboring Mexico City, Acapulco hosted the sailing (then yachting) events. In the 1970s, there was a significant expansion of the port. The Miss Universe 1978 pageant took place in the city. In 1983, singer-songwriter Juan Gabriel wrote the song "Amor eterno", which pays homage to Acapulco. The song was first and most famously recorded by Rocío Dúrcal. Additionally, Acapulco is the hometown of actress, singer, and comedian Aída Pierce, who found fame during the 1980s, 1990s and the first decade of the 21st century. The tollway known as the Ruta del Sol was built during the 1990s, crossing the mountains between Mexico City and Acapulco. The journey takes only about three-and-a-half hours, making Acapulco a favorite weekend destination for Mexico City inhabitants. It was in that time period that the economic impact of Acapulco as a tourist destination increased positively, and as a result new types of services emerged, such as the Colegio Nautilus. This educational project, backed by the state government, was created for the families of local and foreign investors and businessmen living in Acapulco who were in need of a bilingual and international education for their children. The port continued to grow and in 1996, a new private company, API Acapulco, was created to manage operations. This consolidated operations and now Acapulco is the major port for car exports to the Pacific. The city was devastated by Hurricane Pauline in 1997. The storm stranded tourists and left more than 100 dead in the city. Most of the victims were from the shantytowns built on steep hillsides that surround the city. Other victims were swept away by thirty-foot (9 m) waves and winds. The main road, Avenida Costera, became a fast-moving river of sludge three feet (1 m) in depth. 21st century In the 21st century, the Mexican Drug War has had a negative effect on tourism in Acapulco as rival drug traffickers fight each other for the Guerrero coast route that brings drugs from South America as well as soldiers that have been fighting the cartels since 2006. A major gun battle between 18 gunmen and soldiers took place in the summer of 2009 in the Old Acapulco seaside area, lasting hours and killing 16 of the gunmen and two soldiers. This came after the 2009 swine flu pandemic outbreak earlier in the year nearly paralyzed the Mexican economy, forcing hotels to give discounts to bring tourists back. However, hotel occupancy for 2009 was down five percent from the year before. The death of Arturo Beltrán Leyva in December 2009 resulted in infighting among different groups within the Beltrán Leyva cartel. Gang violence continued to plague Acapulco through 2010 and into 2011, most notably with at least 15 dying in drug-related violence on March 13, 2010, and another 15 deaths on January 8, 2011. Among the first incident's dead were six members of the city police and the brother of an ex-mayor. In the second incident, the headless bodies of 15 young men were found dumped near the Plaza Sendero shopping center. On August 20, 2011, Mexican authorities reported that five headless bodies were found in Acapulco, three of which were placed in the city's main tourist area and two of which were cut into multiple pieces. On February 4, 2013, six Spanish men were tied up and robbed and the six Spanish women with them were gang-raped by five masked gunmen who stormed a beach house on the outskirts of Acapulco, though after these accusations, none of the victims decided to press charges. On September 28, 2014, Mexican politician Braulio Zaragoza was gunned down at the El Mirador hotel in the city. He was the leader of the conservative opposition National Action Party (PAN) in southern Guerrero state. Several politicians have been targeted by drug cartels operating in the area. Investigations are under way, but no arrests have yet been made. The insecurity due to individuals involved with drug cartels has cost the city of Acapulco its popularity among national and international tourists. It was stated by the Dirección General de Aeronáutica Civil that the number of international flyers coming to Acapulco decreased from 355,760 flyers registered in 2006 to 52,684 flyers in the year 2015, the number of international tourists flying to Acapulco dropped 85% in the interval of nine years. In 2018, the Mexican Armed Forces entered the city, placing it under occupation. The police department was disarmed after allegations of the latter being linked to the cartels. Hurricane Otis On October 25, 2023, Hurricane Otis, a Category 5 hurricane with 1-minute sustained winds of , caused widespread devastation throughout the city while making landfall nearby. Geography The city, located on the Pacific coast of Mexico in the state of Guerrero, is classified as one of the state's seven regions, dividing the rest of the Guerrero coast into the Costa Grande and the Costa Chica. Forty percent of the municipality is mountainous terrain; another forty percent is semi-flat; and the other twenty percent is flat. Elevation varies from sea level to . The highest peaks are Potrero, San Nicolas, and Alto Camarón. One major river runs through the municipality, the Papagayo, along with a number of arroyos (streams). There are also two small lagoons, Tres Palos and Coyuca, along with a number of thermal springs. Climate Acapulco features a tropical wet and dry climate (Köppen: Aw): hot with distinct wet and dry seasons, with more even temperatures between seasons than resorts farther north in Mexico, but this varies depending on altitude. The warmest areas are next to the sea where the city is. Pacific hurricanes and tropical storms are threats from May through November; notably, the city was struck directly by Category 5 Hurricane Otis on October 25, 2023, which caused extensive damage. The forested area tends to lose leaves during the winter dry season, with evergreen pines in the highest elevations. Fauna consists mostly of deer, small mammals, a wide variety of both land and seabirds, and marine animals such as turtles. Oddly enough, January, its coolest month, also features its all-time record high. The temperature of the sea is quite stable, with lows of between January – March, and a high of in August. Government As the seat of a municipality, the city of Acapulco is the government authority for over 700 other communities, which together have a territory of 1,880.60 km2. This municipality borders the municipalities of Chilpancingo, Juan R Escudero (Tierra Colorada), San Marcos, Coyuca de Benítez with the Pacific Ocean to the south. The metropolitan area is made up of the municipalities of Acapulco de Juárez and Coyuca de Benitez. The area has a population () of 786,830. For the names and terms of some Acapulco mayors, you can check a List of municipal presidents of Acapulco. Demographics Population Acapulco is the most populated city in the state of Guerrero, according to the results of the II Population and Housing Census 2010 carried out by the National Institute of Statistics and Geography (INEGI) with a census date of June 12, 2010, The city had until then a total population of 673 479 inhabitants, of that amount, 324 746 were men and 348 733 women. It is considered the twenty-second most populous city in Mexico and the tenth most populous metropolitan area in Mexico. It is also the city with the highest concentration of population of the homonymous municipality, representing 85.25 percent of the 789.971 inhabitants. The metropolitan area of Acapulco is made up of six towns in the municipality of Acapulco de Juárez and four in the municipality of Coyuca de Benítez. In agreement with the last count and official delimitation realized in 2010 altogether by the National Institute of Statistics and Geography, the National Council of Population and the Secretariat of Social Development, the metropolitan area of Acapulco grouped a total of 863 431 inhabitants in a surface of 3 538.5 km2, which placed it as the tenth most populated district in Mexico. It is estimated according to a study by the National Autonomous University of Mexico on climate and geography, carried out in 2002, that between 2015 and 2020 the city of Acapulco will exceed one million inhabitants. <noinclude> Notes Economy Tourism is the main economic activity of the municipality and most of this is centered on Acapulco Bay. About seventy-three percent of the municipality's population is involved in commerce, most of it related to tourism and the port. Mining and manufacturing employ less than twenty percent and only about five percent is dedicated to agriculture. Industrial production is limited mostly to bottling, milk products, cement products, and ice and energy production. Agricultural products include tomatoes, corn, watermelon, beans, green chili peppers, and melons. Tourism Acapulco is one of Mexico's oldest coastal tourist destinations, reaching prominence in the 1950s as the place where Hollywood stars and millionaires vacationed on the beach in an exotic locale. In modern times, tourists in Acapulco have been facing problems with corrupt local police who steal money by extortion and intimidate visitors with threats of jail. The city is divided into three tourist areas. Traditional Acapulco is the old part of the port, where hotels like Hotel Los Flamingos, owned by personalities Johnny Weissmuller and John Wayne are located, is on the northern end of the bay. Anchored by attractions such as the beaches of Caleta and Caletilla, the cliff divers of La Quebrada, and the city square, known as El Zocalo. The heyday of this part of Acapulco ran from the late 1930s until the 1960s, with development continuing through the 1980s. This older section of town now caters to a mostly middle-class, almost exclusively Mexican clientele, while the glitzier newer section caters to the Mexican upper classes, many of whom never venture into the older, traditional part of town. Acapulco Dorado had its development between the 1950s and the 1970s, and is about 25 minutes from the Acapulco International Airport. It is the area that presents the most tourist influx in the port, runs through much of the Acapulco bay, from Icacos, passing through Costera Miguel Aleman Avenue, which is the main one, to Papagayo Park. It has several hotels, Acapulco Diamante, also known as Punta Diamante, is the newest and most developed part of the port, with investment having created one of the greatest concentrations of luxury facilities in Mexico, including exclusive hotels and resorts of international chains, residential complexes, luxury condominiums and private villas, spas, restaurants, shopping areas and a golf course. Starting at the Scenic Highway in Las Brisas, it includes Puerto Marqués and Punta Diamante and extends to Barra Vieja Beach. It is 10 minutes from the Acapulco International Airport. In this area, all along Boulevard de las Naciones, almost all transportation is by car, limousine or golf cart. Acapulco's reputation of a high-energy party town and the nightlife have long been draws of the city for tourists. From November to April, luxury liners stop here daily and include ships such as the , the , Crystal Harmony, and all the Princess line ships. Despite Acapulco's international fame, most of its visitors are from central Mexico, especially the affluent from Mexico City. Acapulco is one of the embarkation ports for the Mexican cruise line Ocean Star Cruises. For the Christmas season of 2009, Acapulco received 470,000 visitors, most of whom are Mexican nationals, adding 785 million pesos to the economy. Eighty percent arrive by land and eighteen percent by air. The area has over 25,000 condominiums, most of which function as second homes for their Mexican owners. Acapulco is still popular with Mexican celebrities and the wealthy, such as Luis Miguel and Plácido Domingo, who maintain homes there. Problems From the latter 20th century on, the city has also taken on other less-positive reputations. Some consider it a passé resort, eclipsed by the newer Cancún and Cabo San Lucas. Over the years, a number of problems have developed here, especially in the bay and the older sections of the city. The large number of wandering vendors on the beaches, who offer everything from newspapers to massages, are a recognized problem. It is a bother to tourists who simply want to relax on the beach, but the government says it is difficult to eradicate, as there is a lot of unemployment and poverty in the city. Around the city are many small shantytowns that cling to the mountainsides, populated by migrants who have come to the city looking for work. In the last decade, drug-related violence has caused massive problems for the local tourism trade. Another problem is the garbage that has accumulated in the bay. Although 60.65 tons have recently been extracted from the bays of Acapulco and nearby Zihuatanejo, more needs to be done. Most of trash removal during the off seasons is done on the beaches and in the waters closest to them. However, the center of the bay is not touched. The reason trash winds up in the bay is that it is common in the city to throw it in streets, rivers and the bay itself. The most common items cleaned out of the bay are beer bottles and car tires. Acapulco has seen some success in this area, having several beaches receiving the high "blue flag" certifications for cleanliness and water quality. Cuisine Acapulco's cuisine is very rich. The following are typical dishes from the region: Relleno is baked pork with a variety of vegetables and fruits such as potatoes, raisins, carrots and chiles. It is eaten with bread called bolillo. Pozole is a soup with a salsa base (it can be white, red or green), hominy, meat that can be either pork or chicken and it is accompanied with antojitos (snacks) like tostadas, tacos and tamales. This dish is served as part of a weekly Thursday event in the city and the state, with many restaurants offering the meal with special entertainment, from bands to dancers to celebrity impersonators. Attractions Acapulco's main attraction is its nightlife, as it has been for many decades. Nightclubs change names and owners frequently. For example, Baby 'O has been open to the national and international public since 1976 and different celebrities have visited their installations such as Mexican singer Luis Miguel, Bono from U2 and Sylvester Stallone. Another nightclub is Palladium, located in the Escénica Avenue, the location gives the nightclub a view of the Santa Lucia Bay at night. Various DJs have had performances in Palladium among them DVBBS, Tom Swoon, Nervo and Junkie KID. Informal lobby or poolside cocktail bars often offer free live entertainment. In addition, there is the beach bar zone, where younger crowds go. These are located along the Costera road, face the ocean and feature techno or alternative rock. Most are concentrated between the Fiesta Americana and Continental Plaza hotels. These places tend to open earlier and have more informal dress. There is a bungee jump in this area as well. Another attraction at Acapulco is the La Quebrada Cliff Divers. The tradition started in the 1930s when young men casually competed against each other to see who could dive from the highest point into the sea below. Eventually, locals began to ask for tips for those coming to see the men dive. Today the divers are professionals, diving from heights of into an inlet that is only wide and deep, after praying first at a shrine to the Virgin of Guadalupe. On the evening before December 12, the feast day of this Virgin, freestyle cliff divers jump into the sea to honor her. Dives range from the simple to the complicated and end with the "Ocean of Fire" when the sea is lit with gasoline, making a circle of flames which the diver aims for. The spectacle can be seen from a public area which charges a small fee or from the Hotel Plaza Las Glorias/El Mirador from its bar or restaurant terrace. There are a number of beaches in the Acapulco Bay and the immediate coastline. In the bay proper there are the La Angosta (in the Quebrada), Caleta, Caletilla, Dominguillo, Tlacopanocha, Hornos, Hornitos, Honda, Tamarindo, Condesa, Guitarrón, Icacos, Playuela, Playuelilla and Playa del Secreto. In the adjoining, smaller Bay of Puerto Marqués there is Pichilingue, Las Brisas, and Playa Roqueta. Facing open ocean just northwest of the bays is Pie de la Cuesta and southeast are Playa Revolcadero, Playa Aeromar, Playa Encantada and Barra Vieja. Two lagoons are in the area, Coyuca to the northwest of Acapulco Bay and Tres Palos to the southeast. Both lagoons have mangroves and offer boat tours. Tres Palos also has sea turtle nesting areas which are protected. In addition to sunbathing, the beaches around the bay offer a number of services, such as boat rentals, boat tours, horseback riding, scuba diving and other aquatic sports. One popular cruise is from Caletilla Beach to Roqueta Island, which has places to snorkel, have lunch, and a lighthouse. There is also an underwater statue of the Virgin of Guadalupe here, created in 1958 by Armando Quesado in memory of a group of divers who died here. Many of the scuba-diving tours come to this area as well, where there are sunken ships, sea mountains, and cave rock formations. Another popular activity is deep-sea fishing. The major attraction is sail fishing. Fish caught here have weighed between 89 and 200 pounds. Sailfish are so plentiful that boat captains have been known to bet with a potential customer that if he does not catch anything, the trip is free. In the old part of the city, there is a traditional main square called the Zócalo, lined with shade trees, cafés and shops. At the north end of the square is Nuestra Señora de la Soledad cathedral, with blue onion-shaped domes and Byzantine towers. The building was originally constructed as a movie set, but was later adapted into a church. Acapulco's most historic building is the Fort of San Diego, located east of the main square and originally built in 1616 to protect the city from pirate attacks. The fort was partially destroyed by the Dutch in the mid-17th century, rebuilt, then destroyed again in 1776 by an earthquake. It was rebuilt again by 1783 and this is the building that can be seen today, unchanged except for renovations done to it in 2000. Parts of the moats remain as well as the five bulwarks and the battlements. Today the fort serves as the Museo Histórico de Acapulco (Acapulco Historical Museum), which shows the port's history from the pre-Hispanic period until independence. There are temporary exhibits as well. For many years tourists could ride around the city in colorful horse-drawn carriages known as calandrias, but the practice ended in February 2020 due to concerns about mistreatment of the animals. The El Rollo Acapulco is a sea-life and aquatic park located on Costera Miguel Aleman. It offers wave pools, water slides and water toboggans. There are also dolphin shows daily and a swim with dolphins program. The center mostly caters to children. Another place that is popular with children is the Parque Papagayo: a large family park which has a life-sized replica of a Spanish galleon, three artificial lakes, an aviary, a skating rink, rides, go-karts and more. The Dolores Olmedo House is located in the traditional downtown of Acapulco and is noted for the murals by Diego Rivera that adorn it. Olmedo and Rivera had been friend since Olmedo was a child and Rivera spent the last two years of his life here. During that time, he painted nearly nonstop and created the outside walls with tile mosaics, featuring Aztec deities such as Quetzalcoatl. The interior of the home is covered in murals. The home is not a museum, so only the outside murals can be seen by the public. There is a small museum called Casa de la Máscara (House of Masks) which is dedicated to masks, most of them from Mexico, but there are examples from many parts of the world. The collection contains about one thousand examples and is divided into seven rooms called Masks of the World, Mexico across History, The Huichols and the Jaguar, Alebrijes, Dances of Guerrero, Devils and Death, Identity and Fantasy, and Afro-Indian masks. The Botanical Garden of Acapulco is a tropical garden located on lands owned by the Universidad Loyola del Pacífico. Most of the plants here are native to the region, and many, such as the Peltogyne mexicana or purple stick tree, are in danger of extinction. One cultural event that is held yearly in Acapulco is the Festival Internacional de la Nao, which takes place in the Fort of San Diego, located near the Zócalo in downtown of the city. The Festival honors the remembrance of the city's interaction and trades with Oriental territories which started back in the Sixteenth Century. The Nao Festival consists of cultural activities with the support of organizations and embassies from India, China, Japan, Philippines, Thailand, Indonesia and South Korea. The variety of events go from film projections, musical interpretations and theatre to gastronomical classes, some of the events are specifically for kids. The annual French Festival takes place throughout Acapulco city and offers a multitude of events that cement cultural links between Mexico and France. The main features are a fashion show and a gourmet food fair. The Cinépolis Galerías Diana and the Teatro Juan Ruíz de Alarcón present French and French literary figures who give talks on their specialised subjects. Even some of the local nightclubs feature French DJs. Other festivals celebrated here include Carnival, the feast of San Isidro Labrador on 15 May, and in November, a crafts and livestock fair called the Nao de China. There are a number of golf courses in Acapulco including the Acapulco Princess and the Pierre Marqués course, the latter designed by Robert Trent Jones in 1972 for the World Cup Golf Tournament. The Mayan Palace course was designed by Pedro Guericia and an economical course called the Club de Golf Acapulco is near the convention center. The most exclusive course is that of the Tres Vidas Golf Club, designed by Robert von Hagge. It is located next to the ocean and is home to flocks of ducks and other birds. Another famous sport tournament that has been held in Acapulco since 1993 is the Abierto Mexicano Telcel tennis tournament, an ATP 500 event that takes place in the tennis courts of the Princess Mundo Imperial, a resort located in the Diamante zone of Acapulco. Initially it was played in clay courts but it changed to hard court. The event has gained popularity within the passing of the years, attracting some of the top tennis players in the world including Novak Djokovic, Rafael Nadal and Marin Cilic. The total prize money is US$250,000.00 for WTA (women) and US$1,200,000.00 for ATP (men). Acapulco also has a bullring, called the Plaza de Toros, near Caletilla Beach. The season runs during the winter and is called the Fiesta Brava. Spring break Before 2010, over 100,000 American teenagers and young adults traveled to resort areas and balnearios throughout Mexico during spring break each year. The main reason students head to Mexico is the drinking age of 18 years (versus 21 for the United States), something that has been marketed by tour operators along with the sun and ocean. This has become attractive since the 1990s, especially since more traditional spring break places such as Daytona Beach, Florida, have enacted restrictions on drinking and other behaviors. This legislation has pushed spring break tourism to various parts of Mexico, with Acapulco as one of the top destinations. In the late 1990s and early 2000s, Cancún had been favored as the spring break destination of choice. However, Cancún has taken some steps to control the reckless behavior associated with the event, and students have been looking for someplace new. This led many more to choose Acapulco, in spite of the fact that for many travelers, the flight is longer and more expensive than to Cancún. Many were attracted by the glitzy hotels on the south side and Acapulco's famous nightlife. In 2008, 22,500 students came to Acapulco for spring break. Hotels did not get that many in 2009, due mostly to the economic situation in the United States, and partially because of scares of drug-related violence. In February 2009, the US State Department issued a travel alert directed at college students planning spring break trips to Acapulco. The warning—a result of violent activity springing from Mexico's drug cartel débâcle—took college campuses by storm, with some schools going so far as to warn their students about the risks of travel to Mexico over spring break. Bill O'Reilly devoted a segment of his show, The O'Reilly Factor, to urge students to stay away from Acapulco. In June 2009, a number of incidents occurred between the drug cartel and the government. These included coordinated attacks on police headquarters and open battles in the streets, involving large-caliber weapons and grenades. However, no incidents of violence against travelers on spring break were reported. Transportation Nine passenger airlines, including four international ones, fly to Acapulco International Airport. In the city, there are many buses and taxi services one can take to get from place to place, but most of the locals choose to walk to their destinations. However, an important mode of transportation is the government-subsidized 'Colectivo' cab system. These cabs cost 13 pesos per person to ride, but they are not private. The driver will pick up more passengers as long as seats are available, and will transport them to their destination based on first-come, first-served rules. The colectivos each travel a designated area of the city, the three main ones being Costera, Colosio, Coloso, or a mixture of the three. Coloso cabs travel mainly to old Acapulco. Colosio cabs travel through most of the tourist area of Acapulco. Costera cabs drive up and down the coast of Acapulco, where most of the hotels for visitors are located, but which includes some of old Acapulco. Where a driver will take you is partly his choice. Some are willing to travel to the other designated areas, especially during slow periods of the day. The bus system is highly complex and can be rather confusing to an outsider. As far as transportation goes, it is the cheapest form, other than walking, in Acapulco. The most expensive buses have air conditioning, while the cheaper buses do not. For tourists, the Acapulco city government has established a system of yellow buses with Acapulco painted on the side of them. These buses are not for tourists only, but are certainly the nicest and most uniform of the bus systems. These buses travel the tourist section of Acapulco, driving up and down the coast. There are buses with specific routes and destinations, generally written on their windshields or shouted out by a barker riding in the front seat. Perhaps the most unusual thing about the privately operated buses is the fact that they are all highly decorated and personalized, with decals and home-made interior designs that range from comic book scenes, to pornography, and even to "Hello Kitty" themes. The conflictive public transportation would be upgraded on 25 June 2016 with the implementation of the . The Acabús infrastructure has a length of , with 16 stations spread throughout the city of Acapulco and has five routes. This project will help organize traffic because the buses now have a specific line on the roads and there would be more control over transportation and passengers. International relations Consulates Twin towns and partner cities International Manila, 1969 Netanya, 1980 Sendai, 1983 Qingdao, 1985 Quebec City, 1986 Naples, 1986 Beverly Hills, 1988 Onjuku, 1988 Cannes, 1994 McAllen, 1997 Santa Marta, 2005 Manta, 2005 Ordizia, 2008 Yalta, 2012 Sosúa, 2012 Nassau, 2012 Callao, 2014 Cartagena, 2017 Eilat, 2017 Domestic Teocaltiche, 2005 Dolores Hidalgo, 2009 Guanajuato City, 2010 Boca del Río, 2012 Morelia, 2013 UNESCO World Heritage Site nominations In 2014, the idea to nominate the Manila-Acapulco Galleon Trade Route was initiated by the Mexican ambassador to UNESCO with the Filipino ambassador to UNESCO. An Experts' Roundtable Meeting was held at the University of Santo Tomas (UST) on April 23, 2015, as part of the preparation of the Philippines for the possible transnational nomination of the Manila-Acapulco Galleon Trade Route to the World Heritage List. The nomination will be made jointly with Mexico. The following are the experts and the topics they discussed during the roundtable meeting: Dr. Celestina Boncan on the Tornaviaje; Dr. Mary Jane A. Bolunia on Shipyards in the Bicol Region; Mr. Sheldon Clyde Jago-on, Bobby Orillaneda, and Ligaya Lacsina on Underwater Archaeology; Dr. Leovino Garcia on Maps and Cartography; Fr. Rene Javellana, S.J. on Fortifications in the Philippines; Felice Sta. Maria on Food; Dr. Fernando Zialcita on Textile; and Regalado Trota Jose on Historical Dimension. The papers presented and discussed during the roundtable meeting will be synthesized into a working document to establish the route's Outstanding Universal Value. The Mexican side reiterated that they will also follow suit with the preparations for the route's nomination. Spain has also backed the nomination of the Manila-Acapulco Trade Route in the UNESCO World Heritage Site list and has also suggested the Archives of the Manila-Acapulco Galleons to be nominated as part of a separate UNESCO list, the UNESCO Memory of the World Register. See also Acapulco (municipality) Triangle of the Sun Loco in Acapulco References Bibliography External links 1550 establishments in the Spanish Empire Populated coastal places in Mexico Beaches of Guerrero Populated places established in 1525 Populated places in Guerrero Port cities and towns on the Mexican Pacific coast Seaside resorts in Mexico	11
APL (named after the book A Programming Language) is a programming language developed in the 1960s by Kenneth E. Iverson. Its central datatype is the multidimensional array. It uses a large range of special graphic symbols to represent most functions and operators, leading to very concise code. It has been an important influence on the development of concept modeling, spreadsheets, functional programming, and computer math packages. It has also inspired several other programming languages. History Mathematical notation A mathematical notation for manipulating arrays was developed by Kenneth E. Iverson, starting in 1957 at Harvard University. In 1960, he began work for IBM where he developed this notation with Adin Falkoff and published it in his book A Programming Language in 1962. The preface states its premise: This notation was used inside IBM for short research reports on computer systems, such as the Burroughs B5000 and its stack mechanism when stack machines versus register machines were being evaluated by IBM for upcoming computers. Iverson also used his notation in a draft of the chapter A Programming Language, written for a book he was writing with Fred Brooks, Automatic Data Processing, which would be published in 1963. In 1979, Iverson received the Turing Award for his work on APL. Development into a computer programming language As early as 1962, the first attempt to use the notation to describe a complete computer system happened after Falkoff discussed with William C. Carter his work to standardize the instruction set for the machines that later became the IBM System/360 family. In 1963, Herbert Hellerman, working at the IBM Systems Research Institute, implemented a part of the notation on an IBM 1620 computer, and it was used by students in a special high school course on calculating transcendental functions by series summation. Students tested their code in Hellerman's lab. This implementation of a part of the notation was called Personalized Array Translator (PAT). In 1963, Falkoff, Iverson, and Edward H. Sussenguth Jr., all working at IBM, used the notation for a formal description of the IBM System/360 series machine architecture and functionality, which resulted in a paper published in IBM Systems Journal in 1964. After this was published, the team turned their attention to an implementation of the notation on a computer system. One of the motivations for this focus of implementation was the interest of John L. Lawrence who had new duties with Science Research Associates, an educational company bought by IBM in 1964. Lawrence asked Iverson and his group to help use the language as a tool to develop and use computers in education. After Lawrence M. Breed and Philip S. Abrams of Stanford University joined the team at IBM Research, they continued their prior work on an implementation programmed in FORTRAN IV for a part of the notation which had been done for the IBM 7090 computer running on the IBSYS operating system. This work was finished in late 1965 and later named IVSYS (for Iverson system). The basis of this implementation was described in detail by Abrams in a Stanford University Technical Report, "An Interpreter for Iverson Notation" in 1966. The academic aspect of this was formally supervised by Niklaus Wirth. Like Hellerman's PAT system earlier, this implementation did not include the APL character set but used special English reserved words for functions and operators. The system was later adapted for a time-sharing system and, by November 1966, it had been reprogrammed for the IBM System/360 Model 50 computer running in a time-sharing mode and was used internally at IBM. Hardware A key development in the ability to use APL effectively, before the wide use of cathode ray tube (CRT) terminals, was the development of a special IBM Selectric typewriter interchangeable typing element with all the special APL characters on it. This was used on paper printing terminal workstations using the Selectric typewriter and typing element mechanism, such as the IBM 1050 and IBM 2741 terminal. Keycaps could be placed over the normal keys to show which APL characters would be entered and typed when that key was struck. For the first time, a programmer could type in and see proper APL characters as used in Iverson's notation and not be forced to use awkward English keyword representations of them. Falkoff and Iverson had the special APL Selectric typing elements, 987 and 988, designed in late 1964, although no APL computer system was available to use them. Iverson cited Falkoff as the inspiration for the idea of using an IBM Selectric typing element for the APL character set. Many APL symbols, even with the APL characters on the Selectric typing element, still had to be typed in by over-striking two extant element characters. An example is the grade up character, which had to be made from a delta (shift-H) and a Sheffer stroke (shift-M). This was necessary because the APL character set was much larger than the 88 characters allowed on the typing element, even when letters were restricted to upper-case (capitals). Commercial availability The first APL interactive login and creation of an APL workspace was in 1966 by Larry Breed using an IBM 1050 terminal at the IBM Mohansic Labs near Thomas J. Watson Research Center, the home of APL, in Yorktown Heights, New York. IBM was chiefly responsible for introducing APL to the marketplace. The first publicly available version of APL was released in 1968 for the IBM 1130. IBM provided APL\1130 for free but without liability or support. It would run in as little as 8k 16-bit words of memory, and used a dedicated 1 megabyte hard disk. APL gained its foothold on mainframe timesharing systems from the late 1960s through the early 1980s, in part because it would support multiple users on lower-specification systems that had no dynamic address translation hardware. Additional improvements in performance for selected IBM System/370 mainframe systems included the APL Assist Microcode in which some support for APL execution was included in the processor's firmware, as distinct from being implemented entirely by higher-level software. Somewhat later, as suitably performing hardware was finally growing available in the mid- to late-1980s, many users migrated their applications to the personal computer environment. Early IBM APL interpreters for IBM 360 and IBM 370 hardware implemented their own multi-user management instead of relying on the host services, thus they were their own timesharing systems. First introduced for use at IBM in 1966, the APL\360 system was a multi-user interpreter. The ability to programmatically communicate with the operating system for information and setting interpreter system variables was done through special privileged "I-beam" functions, using both monadic and dyadic operations. In 1973, IBM released APL.SV, which was a continuation of the same product, but which offered shared variables as a means to access facilities outside of the APL system, such as operating system files. In the mid-1970s, the IBM mainframe interpreter was even adapted for use on the IBM 5100 desktop computer, which had a small CRT and an APL keyboard, when most other small computers of the time only offered BASIC. In the 1980s, the VSAPL program product enjoyed wide use with Conversational Monitor System (CMS), Time Sharing Option (TSO), VSPC, MUSIC/SP, and CICS users. In 1973–1974, Patrick E. Hagerty directed the implementation of the University of Maryland APL interpreter for the 1100 line of the Sperry UNIVAC 1100/2200 series mainframe computers. In 1974, student Alan Stebbens was assigned the task of implementing an internal function. Xerox APL was available from June 1975 for Xerox 560 and Sigma 6, 7, and 9 mainframes running CP-V and for Honeywell CP-6. In the 1960s and 1970s, several timesharing firms arose that sold APL services using modified versions of the IBM APL\360 interpreter. In North America, the better-known ones were IP Sharp Associates, Scientific Time Sharing Corporation (STSC), Time Sharing Resources (TSR), and The Computer Company (TCC). CompuServe also entered the market in 1978 with an APL Interpreter based on a modified version of Digital Equipment Corp and Carnegie Mellon's, which ran on DEC's KI and KL 36-bit machines. CompuServe's APL was available both to its commercial market and the consumer information service. With the advent first of less expensive mainframes such as the IBM 4300, and later the personal computer, by the mid-1980s, the timesharing industry was all but gone. Sharp APL was available from IP Sharp Associates, first as a timesharing service in the 1960s, and later as a program product starting around 1979. Sharp APL was an advanced APL implementation with many language extensions, such as packages (the ability to put one or more objects into a single variable), a file system, nested arrays, and shared variables. APL interpreters were available from other mainframe and mini-computer manufacturers also, notably Burroughs, Control Data Corporation (CDC), Data General, Digital Equipment Corporation (DEC), Harris, Hewlett-Packard (HP), Siemens, Xerox and others. Garth Foster of Syracuse University sponsored regular meetings of the APL implementers' community at Syracuse's Minnowbrook Conference Center in Blue Mountain Lake, New York. In later years, Eugene McDonnell organized similar meetings at the Asilomar Conference Grounds near Monterey, California, and at Pajaro Dunes near Watsonville, California. The SIGAPL special interest group of the Association for Computing Machinery continues to support the APL community. Microcomputers On microcomputers, which became available from the mid-1970s onwards, BASIC became the dominant programming language. Nevertheless, some microcomputers provided APL instead – the first being the Intel 8008-based MCM/70 which was released in 1974 and which was primarily used in education. Another machine of this time was the VideoBrain Family Computer, released in 1977, which was supplied with its dialect of APL called APL/S. The Commodore SuperPET, introduced in 1981, included an APL interpreter developed by the University of Waterloo. In 1976, Bill Gates claimed in his Open Letter to Hobbyists that Microsoft Corporation was implementing APL for the Intel 8080 and Motorola 6800 but had "very little incentive to make [it] available to hobbyists" because of software piracy. It was never released. APL2 Starting in the early 1980s, IBM APL development, under the leadership of Jim Brown, implemented a new version of the APL language that contained as its primary enhancement the concept of nested arrays, where an array can contain other arrays, and new language features which facilitated integrating nested arrays into program workflow. Ken Iverson, no longer in control of the development of the APL language, left IBM and joined I. P. Sharp Associates, where one of his major contributions was directing the evolution of Sharp APL to be more in accord with his vision. APL2 was first released for CMS and TSO in 1984. The APL2 Workstation edition (Windows, OS/2, AIX, Linux, and Solaris) followed later. As other vendors were busy developing APL interpreters for new hardware, notably Unix-based microcomputers, APL2 was almost always the standard chosen for new APL interpreter developments. Even today, most APL vendors or their users cite APL2 compatibility as a selling point for those products. IBM cites its use for problem solving, system design, prototyping, engineering and scientific computations, expert systems, for teaching mathematics and other subjects, visualization and database access. Modern implementations Various implementations of APL by APLX, Dyalog, et al., include extensions for object-oriented programming, support for .NET, XML-array conversion primitives, graphing, operating system interfaces, and lambda calculus expressions. Freeware versions include GNU APL for Linux and NARS2000 for Windows (which runs on Linux under Wine). Both of these are fairly complete versions of APL2 with various language extensions. Derivative languages APL has formed the basis of, or influenced, the following languages: A and A+, an alternative APL, the latter with graphical extensions. FP, a functional programming language. Ivy, an interpreter for an APL-like language developed by Rob Pike, and which uses ASCII as input. J, which was also designed by Iverson, and which uses ASCII with digraphs instead of special symbols. K, a proprietary variant of APL developed by Arthur Whitney. MATLAB, a numerical computation tool. Nial, a high-level array programming language with a functional programming notation. Polymorphic Programming Language, an interactive, extensible language with a similar base language. S, a statistical programming language (usually now seen in the open-source version known as R). Snap!, a low-code block-based programming language, born as an extended reimplementation of Scratch Speakeasy, a numerical computing interactive environment. Wolfram Language, the programming language of Mathematica. Language characteristics Character set APL has been criticized and praised for its choice of a unique, non-standard character set. In the 1960s and 1970s, few terminal devices or even displays could reproduce the APL character set. The most popular ones employed the IBM Selectric print mechanism used with a special APL type element. One of the early APL line terminals (line-mode operation only, not full screen) was the Texas Instruments TI Model 745 () with the full APL character set which featured half and full duplex telecommunications modes, for interacting with an APL time-sharing service or remote mainframe to run a remote computer job, called an RJE. Over time, with the universal use of high-quality graphic displays, printing devices and Unicode support, the APL character font problem has largely been eliminated. However, entering APL characters requires the use of input method editors, keyboard mappings, virtual/on-screen APL symbol sets, or easy-reference printed keyboard cards which can frustrate beginners accustomed to other programming languages. With beginners who have no prior experience with other programming languages, a study involving high school students found that typing and using APL characters did not hinder the students in any measurable way. In defense of APL, it requires fewer characters to type, and keyboard mappings become memorized over time. Special APL keyboards are also made and in use today, as are freely downloadable fonts for operating systems such as Microsoft Windows. The reported productivity gains assume that one spends enough time working in the language to make it worthwhile to memorize the symbols, their semantics, and keyboard mappings, not to mention a substantial number of idioms for common tasks. Design Unlike traditionally structured programming languages, APL code is typically structured as chains of monadic or dyadic functions, and operators acting on arrays. APL has many nonstandard primitives (functions and operators) that are indicated by a single symbol or a combination of a few symbols. All primitives are defined to have the same precedence, and always associate to the right. Thus, APL is read or best understood from right-to-left. Early APL implementations ( or so) had no programming loop-flow control structures, such as do or while loops, and if-then-else constructs. Instead, they used array operations, and use of structured programming constructs was often not necessary, since an operation could be performed on a full array in one statement. For example, the iota function (ι) can replace for-loop iteration: ιN when applied to a scalar positive integer yields a one-dimensional array (vector), 1 2 3 ... N. More recent implementations of APL generally include comprehensive control structures, so that data structure and program control flow can be clearly and cleanly separated. The APL environment is called a workspace. In a workspace the user can define programs and data, i.e., the data values exist also outside the programs, and the user can also manipulate the data without having to define a program. In the examples below, the APL interpreter first types six spaces before awaiting the user's input. Its own output starts in column one. The user can save the workspace with all values, programs, and execution status. APL uses a set of non-ASCII symbols, which are an extension of traditional arithmetic and algebraic notation. Having single character names for single instruction, multiple data (SIMD) vector functions is one way that APL enables compact formulation of algorithms for data transformation such as computing Conway's Game of Life in one line of code. In nearly all versions of APL, it is theoretically possible to express any computable function in one expression, that is, in one line of code. Because of the unusual character set, many programmers use special keyboards with APL keytops to write APL code. Although there are various ways to write APL code using only ASCII characters, in practice it is almost never done. (This may be thought to support Iverson's thesis about notation as a tool of thought.) Most if not all modern implementations use standard keyboard layouts, with special mappings or input method editors to access non-ASCII characters. Historically, the APL font has been distinctive, with uppercase italic alphabetic characters and upright numerals and symbols. Most vendors continue to display the APL character set in a custom font. Advocates of APL claim that the examples of so-called write-only code (badly written and almost incomprehensible code) are almost invariably examples of poor programming practice or novice mistakes, which can occur in any language. Advocates also claim that they are far more productive with APL than with more conventional computer languages, and that working software can be implemented in far less time and with far fewer programmers than using other technology. They also may claim that because it is compact and terse, APL lends itself well to larger-scale software development and complexity, because the number of lines of code can be reduced greatly. Many APL advocates and practitioners also view standard programming languages such as COBOL and Java as being comparatively tedious. APL is often found where time-to-market is important, such as with trading systems. Terminology APL makes a clear distinction between functions and operators. Functions take arrays (variables or constants or expressions) as arguments, and return arrays as results. Operators (similar to higher-order functions) take functions or arrays as arguments, and derive related functions. For example, the sum function is derived by applying the reduction operator to the addition function. Applying the same reduction operator to the maximum function (which returns the larger of two numbers) derives a function which returns the largest of a group (vector) of numbers. In the J language, Iverson substituted the terms verb for function and adverb or conjunction for operator. APL also identifies those features built into the language, and represented by a symbol, or a fixed combination of symbols, as primitives. Most primitives are either functions or operators. Coding APL is largely a process of writing non-primitive functions and (in some versions of APL) operators. However a few primitives are considered to be neither functions nor operators, most noticeably assignment. Some words used in APL literature have meanings that differ from those in both mathematics and the generality of computer science. Syntax APL has explicit representations of functions, operators, and syntax, thus providing a basis for the clear and explicit statement of extended facilities in the language, and tools to experiment on them. Examples Hello, world This displays "Hello, world": 'Hello, world'A design theme in APL is to define default actions in some cases that would produce syntax errors in most other programming languages. The 'Hello, world' string constant above displays, because display is the default action on any expression for which no action is specified explicitly (e.g. assignment, function parameter). Exponentiation Another example of this theme is that exponentiation in APL is written as , which indicates raising 2 to the power 3 (this would be written as or in some languages, or relegated to a function call such as in others). Many languages use to signify multiplication, as in , but APL chooses to use . However, if no base is specified (as with the statement in APL, or in other languages), most programming languages one would see this as a syntax error. APL, however, assumes the missing base to be the natural logarithm constant e, and interprets as . Simple statistics Suppose that is an array of numbers. Then gives its average. Reading right-to-left, gives the number of elements in X, and since is a dyadic operator, the term to its left is required as well. It is surrounded by parentheses since otherwise X would be taken (so that the summation would be of —each element of X divided by the number of elements in X), and gives the sum of the elements of X. Building on this, the following expression computes standard deviation: Naturally, one would define this expression as a function for repeated use rather than rewriting it each time. Further, since assignment is an operator, it can appear within an expression, so the following would place suitable values into T, AV and SD: Pick 6 lottery numbers This following immediate-mode expression generates a typical set of Pick 6 lottery numbers: six pseudo-random integers ranging from 1 to 40, guaranteed non-repeating, and displays them sorted in ascending order: x[⍋x←6?40] The above does a lot, concisely, although it may seem complex to a new APLer. It combines the following APL functions (also called primitives and glyphs): The first to be executed (APL executes from rightmost to leftmost) is dyadic function ? (named deal when dyadic) that returns a vector consisting of a select number (left argument: 6 in this case) of random integers ranging from 1 to a specified maximum (right argument: 40 in this case), which, if said maximum ≥ vector length, is guaranteed to be non-repeating; thus, generate/create 6 random integers ranging from 1 to 40. This vector is then assigned (←) to the variable x, because it is needed later. This vector is then sorted in ascending order by a monadic ⍋ function, which has as its right argument everything to the right of it up to the next unbalanced close-bracket or close-parenthesis. The result of ⍋ is the indices that will put its argument into ascending order. Then the output of ⍋ is used to index the variable x, which we saved earlier for this purpose, thereby selecting its items in ascending sequence. Since there is no function to the left of the left-most x to tell APL what to do with the result, it simply outputs it to the display (on a single line, separated by spaces) without needing any explicit instruction to do that. ? also has a monadic equivalent called roll, which simply returns one random integer between 1 and its sole operand [to the right of it], inclusive. Thus, a role-playing game program might use the expression ?20 to roll a twenty-sided die. Prime numbers The following expression finds all prime numbers from 1 to R. In both time and space, the calculation complexity is (in Big O notation). (~R∊R∘.×R)/R←1↓⍳R Executed from right to left, this means: Iota ⍳ creates a vector containing integers from 1 to R (if R= 6 at the start of the program, ⍳R is 1 2 3 4 5 6) Drop first element of this vector (↓ function), i.e., 1. So 1↓⍳R is 2 3 4 5 6 Set R to the new vector (←, assignment primitive), i.e., 2 3 4 5 6 The / replicate operator is dyadic (binary) and the interpreter first evaluates its left argument (fully in parentheses): Generate outer product of R multiplied by R, i.e., a matrix that is the multiplication table of R by R (°.× operator), i.e., Build a vector the same length as R with 1 in each place where the corresponding number in R is in the outer product matrix (∈, set inclusion or element of or Epsilon operator), i.e., 0 0 1 0 1 Logically negate (not) values in the vector (change zeros to ones and ones to zeros) (∼, logical not or Tilde operator), i.e., 1 1 0 1 0 Select the items in R for which the corresponding element is 1 (/ replicate operator), i.e., 2 3 5 (Note, this assumes the APL origin is 1, i.e., indices start with 1. APL can be set to use 0 as the origin, so that ι6 is 0 1 2 3 4 5, which is convenient for some calculations.) Sorting The following expression sorts a word list stored in matrix X according to word length: X[⍋X+.≠' ';] Game of Life The following function "life", written in Dyalog APL, takes a boolean matrix and calculates the new generation according to Conway's Game of Life. It demonstrates the power of APL to implement a complex algorithm in very little code, but understanding it requires some advanced knowledge of APL (as the same program would in many languages). life ← {⊃1 ⍵ ∨.∧ 3 4 = +/ +⌿ ¯1 0 1 ∘.⊖ ¯1 0 1 ⌽¨ ⊂⍵} HTML tags removal In the following example, also Dyalog, the first line assigns some HTML code to a variable txt and then uses an APL expression to remove all the HTML tags (explanation): txt←'<html><body><p>This is <em>emphasized</em> text.</p></body></html>' {⍵ /⍨ ~{⍵∨≠\⍵}⍵∊'<>'} txt This is emphasized text. Naming APL derives its name from the initials of Iverson's book A Programming Language, even though the book describes Iverson's mathematical notation, rather than the implemented programming language described in this article. The name is used only for actual implementations, starting with APL\360. Adin Falkoff coined the name in 1966 during the implementation of APL\360 at IBM: APL is occasionally re-interpreted as Array Programming Language or Array Processing Language, thereby making APL into a backronym. Logo There has always been cooperation between APL vendors, and joint conferences were held on a regular basis from 1969 until 2010. At such conferences, APL merchandise was often handed out, featuring APL motifs or collection of vendor logos. Common were apples (as a pun on the similarity in pronunciation of apple and APL) and the code snippet which are the symbols produced by the classic APL keyboard layout when holding the APL modifier key and typing "APL". Despite all these community efforts, no universal vendor-agnostic logo for the programming language emerged. As popular programming languages increasingly have established recognisable logos, Fortran getting one in 2020, British APL Association launched a campaign in the second half of 2021, to establish such a logo for APL, and after a community election and multiple rounds of feedback, a logo was chosen in May 2022. Use APL is used for many purposes including financial and insurance applications, artificial intelligence, neural networks and robotics. It has been argued that APL is a calculation tool and not a programming language; its symbolic nature and array capabilities have made it popular with domain experts and data scientists who do not have or require the skills of a computer programmer. APL is well suited to image manipulation and computer animation, where graphic transformations can be encoded as matrix multiplications. One of the first commercial computer graphics houses, Digital Effects, produced an APL graphics product named Visions, which was used to create television commercials and animation for the 1982 film Tron. Latterly, the Stormwind boating simulator uses APL to implement its core logic, its interfacing to the rendering pipeline middleware and a major part of its physics engine. Today, APL remains in use in a wide range of commercial and scientific applications, for example investment management, asset management, health care, and DNA profiling, and by hobbyists. Notable implementations APL\360 The first implementation of APL using recognizable APL symbols was APL\360 which ran on the IBM System/360, and was completed in November 1966 though at that time remained in use only within IBM. In 1973 its implementors, Larry Breed, Dick Lathwell and Roger Moore, were awarded the Grace Murray Hopper Award from the Association for Computing Machinery (ACM). It was given "for their work in the design and implementation of APL\360, setting new standards in simplicity, efficiency, reliability and response time for interactive systems." In 1975, the IBM 5100 microcomputer offered APL\360 as one of two built-in ROM-based interpreted languages for the computer, complete with a keyboard and display that supported all the special symbols used in the language. Significant developments to APL\360 included CMS/APL, which made use of the virtual storage capabilities of CMS and APLSV, which introduced shared variables, system variables and system functions. It was subsequently ported to the IBM System/370 and VSPC platforms until its final release in 1983, after which it was replaced by APL2. APL\1130 In 1968, APL\1130 became the first publicly available APL system, created by IBM for the IBM 1130. It became the most popular IBM Type-III Library software that IBM released. APLPlus and Sharp APL APLPlus and Sharp APL are versions of APL\360 with added business-oriented extensions such as data formatting and facilities to store APL arrays in external files. They were jointly developed by two companies, employing various members of the original IBM APL\360 development team. The two companies were I. P. Sharp Associates (IPSA), an APL\360 services company formed in 1964 by Ian Sharp, Roger Moore and others, and STSC, a time-sharing and consulting service company formed in 1969 by Lawrence Breed and others. Together the two developed APLPlus and thereafter continued to work together but develop APL separately as APLPlus and Sharp APL. STSC ported APLPlus to many platforms with versions being made for the VAX 11, PC and UNIX, whereas IPSA took a different approach to the arrival of the personal computer and made Sharp APL available on this platform using additional PC-XT/360 hardware. In 1993, Soliton Incorporated was formed to support Sharp APL and it developed Sharp APL into SAX (Sharp APL for Unix). , APLPlus continues as APL2000 APL+Win. In 1985, Ian Sharp, and Dan Dyer of STSC, jointly received the Kenneth E. Iverson Award for Outstanding Contribution to APL. APL2 APL2 was a significant re-implementation of APL by IBM which was developed from 1971 and first released in 1984. It provides many additions to the language, of which the most notable is nested (non-rectangular) array support. The entire APL2 Products and Services Team was awarded the Iverson Award in 2007. In 2021, IBM sold APL2 to Log-On Software, who develop and sell the product as Log-On APL2. APLGOL In 1972, APLGOL was released as an experimental version of APL that added structured programming language constructs to the language framework. New statements were added for interstatement control, conditional statement execution, and statement structuring, as well as statements to clarify the intent of the algorithm. It was implemented for Hewlett-Packard in 1977. Dyalog APL Dyalog APL was first released by British company Dyalog Ltd. in 1983 and, , is available for AIX, Linux (including on the Raspberry Pi), macOS and Microsoft Windows platforms. It is based on APL2, with extensions to support object-oriented programming, functional programming, and tacit programming. Licences are free for personal/non-commercial use. In 1995, two of the development team – John Scholes and Peter Donnelly – were awarded the Iverson Award for their work on the interpreter. Gitte Christensen and Morten Kromberg were joint recipients of the Iverson Award in 2016. NARS2000 NARS2000 is an open-source APL interpreter written by Bob Smith, a prominent APL developer and implementor from STSC in the 1970s and 1980s. NARS2000 contains advanced features and new datatypes and runs natively on Microsoft Windows, and other platforms under Wine. It is named after a development tool from the 1980s, NARS (Nested Arrays Research System). APLX APLX is a cross-platform dialect of APL, based on APL2 and with several extensions, which was first released by British company MicroAPL in 2002. Although no longer in development or on commercial sale it is now available free of charge from Dyalog. York APL York APL was developed at the York University, Ontario around 1968, running on IBM 360 mainframes. One notable difference between it and APL\360 was that it defined the "shape" (ρ) of a scalar as 1 whereas APL\360 defined it as the more mathematically correct 0 — this made it easier to write functions that acted the same with scalars and vectors. GNU APL GNU APL is a free implementation of Extended APL as specified in ISO/IEC 13751:2001 and is thus an implementation of APL2. It runs on Linux, macOS, several BSD dialects, and on Windows (either using Cygwin for full support of all its system functions or as a native 64-bit Windows binary with some of its system functions missing). GNU APL uses Unicode internally and can be scripted. It was written by Jürgen Sauermann. Richard Stallman, founder of the GNU Project, was an early adopter of APL, using it to write a text editor as a high school student in the summer of 1969. Interpretation and compilation of APL APL is traditionally an interpreted language, having language characteristics such as weak variable typing not well suited to compilation. However, with arrays as its core data structure it provides opportunities for performance gains through parallelism, parallel computing, massively parallel applications, and very-large-scale integration (VLSI), and from the outset APL has been regarded as a high-performance language – for example, it was noted for the speed with which it could perform complicated matrix operations "because it operates on arrays and performs operations like matrix inversion internally". Nevertheless, APL is rarely purely interpreted and compilation or partial compilation techniques that are, or have been, used include the following: Idiom recognition Most APL interpreters support idiom recognition and evaluate common idioms as single operations. For example, by evaluating the idiom BV/⍳⍴A as a single operation (where BV is a Boolean vector and A is an array), the creation of two intermediate arrays is avoided. Optimised bytecode Weak typing in APL means that a name may reference an array (of any datatype), a function or an operator. In general, the interpreter cannot know in advance which form it will be and must therefore perform analysis, syntax checking etc. at run-time. However, in certain circumstances, it is possible to deduce in advance what type a name is expected to reference and then generate bytecode which can be executed with reduced run-time overhead. This bytecode can also be optimised using compilation techniques such as constant folding or common subexpression elimination. The interpreter will execute the bytecode when present and when any assumptions which have been made are met. Dyalog APL includes support for optimised bytecode. Compilation Compilation of APL has been the subject of research and experiment since the language first became available; the first compiler is considered to be the Burroughs APL-700 which was released around 1971. In order to be able to compile APL, language limitations have to be imposed. APEX is a research APL compiler which was written by Robert Bernecky and is available under the GNU Public License. The STSC APL Compiler is a hybrid of a bytecode optimiser and a compiler – it enables compilation of functions to machine code provided that its sub-functions and globals are declared, but the interpreter is still used as a runtime library and to execute functions which do not meet the compilation requirements. Standards APL has been standardized by the American National Standards Institute (ANSI) working group X3J10 and International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC), ISO/IEC Joint Technical Committee 1 Subcommittee 22 Working Group 3. The Core APL language is specified in ISO 8485:1989, and the Extended APL language is specified in ISO/IEC 13751:2001. References Further reading An APL Machine (1970 Stanford doctoral dissertation by Philip Abrams) A Personal History Of APL (1982 article by Michael S. Montalbano) A Programming Language by Kenneth E. Iverson APL in Exposition by Kenneth E. Iverson Brooks, Frederick P.; Kenneth Iverson (1965). Automatic Data Processing, System/360 Edition. . Video – a 1974 talk show style interview with the original developers of APL. – a 1975 live demonstration of APL by Professor Bob Spence, Imperial College London. – a 2009 tutorial by John Scholes of Dyalog Ltd. which implements Conway's Game of Life in a single line of APL. – a 2009 introduction to APL by Graeme Robertson. External links Online resources TryAPL.org, an online APL primer APL2C, a source of links to APL compilers .NET programming languages APL programming language family Array programming languages Command shells Dynamic programming languages Dynamically typed programming languages Functional languages IBM software Programming languages created in 1964 Programming languages with an ISO standard Programming languages Homoiconic programming languages	16
ALGOL (; short for "Algorithmic Language") is a family of imperative computer programming languages originally developed in 1958. ALGOL heavily influenced many other languages and was the standard method for algorithm description used by the Association for Computing Machinery (ACM) in textbooks and academic sources for more than thirty years. In the sense that the syntax of most modern languages is "Algol-like", it was arguably more influential than three other high-level programming languages among which it was roughly contemporary: FORTRAN, Lisp, and COBOL. It was designed to avoid some of the perceived problems with FORTRAN and eventually gave rise to many other programming languages, including PL/I, Simula, BCPL, B, Pascal, and C. ALGOL introduced code blocks and the begin...end pairs for delimiting them. It was also the first language implementing nested function definitions with lexical scope. Moreover, it was the first programming language which gave detailed attention to formal language definition and through the Algol 60 Report introduced Backus–Naur form, a principal formal grammar notation for language design. There were three major specifications, named after the years they were first published: ALGOL 58 – originally proposed to be called IAL, for International Algebraic Language. ALGOL 60 – first implemented as X1 ALGOL 60 in 1961. Revised 1963. ALGOL 68 – introduced new elements including flexible arrays, slices, parallelism, operator identification. Revised 1973. ALGOL 68 is substantially different from ALGOL 60 and was not well received, so in general "Algol" means ALGOL 60 and its dialects. History ALGOL was developed jointly by a committee of European and American computer scientists in a meeting in 1958 at the Swiss Federal Institute of Technology in Zurich (cf. ALGOL 58). It specified three different syntaxes: a reference syntax, a publication syntax, and an implementation syntax. The different syntaxes permitted it to use different keyword names and conventions for decimal points (commas vs periods) for different languages. ALGOL was used mostly by research computer scientists in the United States and in Europe. Its use in commercial applications was hindered by the absence of standard input/output facilities in its description and the lack of interest in the language by large computer vendors other than Burroughs Corporation. ALGOL 60 did however become the standard for the publication of algorithms and had a profound effect on future language development. John Backus developed the Backus normal form method of describing programming languages specifically for ALGOL 58. It was revised and expanded by Peter Naur for ALGOL 60, and at Donald Knuth's suggestion renamed Backus–Naur form. Peter Naur: "As editor of the ALGOL Bulletin I was drawn into the international discussions of the language and was selected to be member of the European language design group in November 1959. In this capacity I was the editor of the ALGOL 60 report, produced as the result of the ALGOL 60 meeting in Paris in January 1960." The following people attended the meeting in Paris (from 1 to 16 January): Friedrich Ludwig Bauer, Peter Naur, Heinz Rutishauser, Klaus Samelson, Bernard Vauquois, Adriaan van Wijngaarden, and Michael Woodger (from Europe) John Warner Backus, Julien Green, Charles Katz, John McCarthy, Alan Jay Perlis, and Joseph Henry Wegstein (from the US). Alan Perlis gave a vivid description of the meeting: "The meetings were exhausting, interminable, and exhilarating. One became aggravated when one's good ideas were discarded along with the bad ones of others. Nevertheless, diligence persisted during the entire period. The chemistry of the 13 was excellent." ALGOL 60 inspired many languages that followed it. Tony Hoare remarked: "Here is a language so far ahead of its time that it was not only an improvement on its predecessors but also on nearly all its successors." The Scheme programming language, a variant of Lisp that adopted the block structure and lexical scope of ALGOL, also adopted the wording "Revised Report on the Algorithmic Language Scheme" for its standards documents in homage to ALGOL. ALGOL and programming language research As Peter Landin noted, ALGOL was the first language to combine seamlessly imperative effects with the (call-by-name) lambda calculus. Perhaps the most elegant formulation of the language is due to John C. Reynolds, and it best exhibits its syntactic and semantic purity. Reynolds's idealized ALGOL also made a convincing methodologic argument regarding the suitability of local effects in the context of call-by-name languages, in contrast with the global effects used by call-by-value languages such as ML. The conceptual integrity of the language made it one of the main objects of semantic research, along with Programming Computable Functions (PCF) and ML. IAL implementations timeline To date there have been at least 70 augmentations, extensions, derivations and sublanguages of Algol 60. The Burroughs dialects included special Bootstrapping dialects such as ESPOL and NEWP. The latter is still used for Unisys MCP system software. Properties ALGOL 60 as officially defined had no I/O facilities; implementations defined their own in ways that were rarely compatible with each other. In contrast, ALGOL 68 offered an extensive library of transput (input/output) facilities. ALGOL 60 allowed for two evaluation strategies for parameter passing: the common call-by-value, and call-by-name. Call-by-name has certain effects in contrast to call-by-reference. For example, without specifying the parameters as value or reference, it is impossible to develop a procedure that will swap the values of two parameters if the actual parameters that are passed in are an integer variable and an array that is indexed by that same integer variable. Think of passing a pointer to swap(i, A[i]) in to a function. Now that every time swap is referenced, it is reevaluated. Say i := 1 and A[i] := 2, so every time swap is referenced it will return the other combination of the values ([1,2], [2,1], [1,2] and so on). A similar situation occurs with a random function passed as actual argument. Call-by-name is known by many compiler designers for the interesting "thunks" that are used to implement it. Donald Knuth devised the "man or boy test" to separate compilers that correctly implemented "recursion and non-local references." This test contains an example of call-by-name. ALGOL 68 was defined using a two-level grammar formalism invented by Adriaan van Wijngaarden and which bears his name. Van Wijngaarden grammars use a context-free grammar to generate an infinite set of productions that will recognize a particular ALGOL 68 program; notably, they are able to express the kind of requirements that in many other programming language standards are labelled "semantics" and have to be expressed in ambiguity-prone natural language prose, and then implemented in compilers as ad hoc code attached to the formal language parser. Examples and portability issues Code sample comparisons ALGOL 60 (The way the bold text has to be written depends on the implementation, e.g. 'INTEGER'—quotation marks included—for integer. This is known as stropping.) procedure Absmax(a) Size:(n, m) Result:(y) Subscripts:(i, k); value n, m; array a; integer n, m, i, k; real y; comment The absolute greatest element of the matrix a, of size n by m, is copied to y, and the subscripts of this element to i and k; begin integer p, q; y := 0; i := k := 1; for p := 1 step 1 until n do for q := 1 step 1 until m do if abs(a[p, q]) > y then begin y := abs(a[p, q]); i := p; k := q end end Absmax Here is an example of how to produce a table using Elliott 803 ALGOL. FLOATING POINT ALGOL TEST' BEGIN REAL A,B,C,D' READ D' FOR A:= 0.0 STEP D UNTIL 6.3 DO BEGIN PRINT PUNCH(3),££L??' B := SIN(A)' C := COS(A)' PRINT PUNCH(3),SAMELINE,ALIGNED(1,6),A,B,C' END END' PUNCH(3) sends output to the teleprinter rather than the tape punch. SAMELINE suppresses the carriage return + line feed normally printed between arguments. ALIGNED(1,6) controls the format of the output with one digit before and six after the decimal point. ALGOL 68 The following code samples are ALGOL 68 versions of the above ALGOL 60 code samples. ALGOL 68 implementations used ALGOL 60's approaches to stropping. In ALGOL 68's case tokens with the bold typeface are reserved words, types (modes) or operators. proc abs max = ([,]real a, ref real y, ref int i, k)real: comment The absolute greatest element of the matrix a, of size ⌈a by 2⌈a is transferred to y, and the subscripts of this element to i and k; comment begin real y := 0; i := ⌊a; k := 2⌊a; for p from ⌊a to ⌈a do for q from 2⌊a to 2⌈a do if abs a[p, q] > y then y := abs a[p, q]; i := p; k := q fi od od; y end # abs max # Note: lower (⌊) and upper (⌈) bounds of an array, and array slicing, are directly available to the programmer. floating point algol68 test: ( real a,b,c,d; # printf – sends output to the file stand out. # # printf($p$); – selects a new page # printf(($pg$,"Enter d:")); read(d); for step from 0 while a:=stepd; a <= 2pi do printf($l$); # $l$ - selects a new line. # b := sin(a); c := cos(a); printf(($z-d.6d$,a,b,c)) # formats output with 1 digit before and 6 after the decimal point. # od ) Timeline: Hello world The variations and lack of portability of the programs from one implementation to another is easily demonstrated by the classic hello world program. ALGOL 58 (IAL) ALGOL 58 had no I/O facilities. ALGOL 60 family Since ALGOL 60 had no I/O facilities, there is no portable hello world program in ALGOL. The next three examples are in Burroughs Extended Algol. The first two direct output at the interactive terminal they are run on. The first uses a character array, similar to C. The language allows the array identifier to be used as a pointer to the array, and hence in a REPLACE statement. A simpler program using an inline format: An even simpler program using the Display statement. Note that its output would end up at the system console ('SPO'): An alternative example, using Elliott Algol I/O is as follows. Elliott Algol used different characters for "open-string-quote" and "close-string-quote", represented here by and . Below is a version from Elliott 803 Algol (A104). The standard Elliott 803 used five-hole paper tape and thus only had upper case. The code lacked any quote characters so £ (UK Pound Sign) was used for open quote and ? (Question Mark) for close quote. Special sequences were placed in double quotes (e.g. ££L?? produced a new line on the teleprinter). HIFOLKS' BEGIN PRINT £HELLO WORLD£L??' END' The ICT 1900 series Algol I/O version allowed input from paper tape or punched card. Paper tape 'full' mode allowed lower case. Output was to a line printer. The open and close quote characters were represented using '(' and ')' and spaces by %. 'BEGIN' WRITE TEXT('('HELLO%WORLD')'); 'END' ALGOL 68 ALGOL 68 code was published with reserved words typically in lowercase, but bolded or underlined. begin printf(($gl$,"Hello, world!")) end In the language of the "Algol 68 Report" the input/output facilities were collectively called the "Transput". Timeline of ALGOL special characters The ALGOLs were conceived at a time when character sets were diverse and evolving rapidly; also, the ALGOLs were defined so that only uppercase letters were required. 1960: IFIP – The Algol 60 language and report included several mathematical symbols which are available on modern computers and operating systems, but, unfortunately, were unsupported on most computing systems at the time. For instance: ×, ÷, ≤, ≥, ≠, ¬, ∨, ∧, ⊂, ≡, ␣ and ⏨. 1961 September: ASCII – The ASCII character set, then in an early stage of development, had the \ (Back slash) character added to it in order to support ALGOL's boolean operators /\ and \/. 1962: ALCOR – This character set included the unusual "᛭" runic cross character for multiplication and the "⏨" Decimal Exponent Symbol for floating point notation. 1964: GOST – The 1964 Soviet standard GOST 10859 allowed the encoding of 4-bit, 5-bit, 6-bit and 7-bit characters in ALGOL. 1968: The "Algol 68 Report" – used extant ALGOL characters, and further adopted →, ↓, ↑, □, ⌊, ⌈, ⎩, ⎧, ○, ⊥, and ¢ characters which can be found on the IBM 2741 keyboard with typeball (or golf ball) print heads inserted (such as the APL golf ball). These became available in the mid-1960s while ALGOL 68 was being drafted. The report was translated into Russian, German, French, and Bulgarian, and allowed programming in languages with larger character sets, e.g., Cyrillic alphabet of the Soviet BESM-4. All ALGOL's characters are also part of the Unicode standard and most of them are available in several popular fonts. 2009 October: Unicode – The ⏨ (Decimal Exponent Symbol) for floating point notation was added to Unicode 5.2 for backward compatibility with historic Buran programme ALGOL software. See also References Further reading Brian Randell and L. J. Russell, ALGOL 60 Implementation: The Translation and Use of ALGOL 60 Programs on a Computer. Academic Press, 1964. The design of the Whetstone Compiler. One of the early published descriptions of implementing a compiler. See the related papers: Whetstone Algol Revisited, and The Whetstone KDF9 Algol Translator by Brian Randell Revised Report on the Algorithmic Language Algol 60 by Peter Naur, et al. ALGOL definition "The European Side of the Last Phase of the Development of ALGOL 60" by Peter Naur External links History of ALGOL at the Computer History Museum Web enabled ALGOL-F compiler for small experiments An online ALGOL compiler ALGOL 60 dialect Articles with example ALGOL 60 code Computer-related introductions in 1958 Procedural programming languages Programming languages created in 1958 Structured programming languages Systems programming languages	5
AWK (awk ) is a domain-specific language designed for text processing and typically used as a data extraction and reporting tool. Like sed and grep, it is a filter, and is a standard feature of most Unix-like operating systems. The AWK language is a data-driven scripting language consisting of a set of actions to be taken against streams of textual data – either run directly on files or used as part of a pipeline – for purposes of extracting or transforming text, such as producing formatted reports. The language extensively uses the string datatype, associative arrays (that is, arrays indexed by key strings), and regular expressions. While AWK has a limited intended application domain and was especially designed to support one-liner programs, the language is Turing-complete, and even the early Bell Labs users of AWK often wrote well-structured large AWK programs. AWK was created at Bell Labs in the 1970s, and its name is derived from the surnames of its authors: Alfred Aho, Peter Weinberger, and Brian Kernighan. The acronym is pronounced the same as the name of the bird species auk, which is illustrated on the cover of The AWK Programming Language. When written in all lowercase letters, as awk, it refers to the Unix or Plan 9 program that runs scripts written in the AWK programming language. History AWK was initially developed in 1977 by Alfred Aho (author of egrep), Peter J. Weinberger (who worked on tiny relational databases), and Brian Kernighan. AWK takes its name from their respective initials. According to Kernighan, one of the goals of AWK was to have a tool that would easily manipulate both numbers and strings. AWK was also inspired by Marc Rochkind's programming language that was used to search for patterns in input data, and was implemented using yacc. As one of the early tools to appear in Version 7 Unix, AWK added computational features to a Unix pipeline besides the Bourne shell, the only scripting language available in a standard Unix environment. It is one of the mandatory utilities of the Single UNIX Specification, and is required by the Linux Standard Base specification. AWK was significantly revised and expanded in 1985–88, resulting in the GNU AWK implementation written by Paul Rubin, Jay Fenlason, and Richard Stallman, released in 1988. GNU AWK may be the most widely deployed version because it is included with GNU-based Linux packages. GNU AWK has been maintained solely by Arnold Robbins since 1994. Brian Kernighan's nawk (New AWK) source was first released in 1993 unpublicized, and publicly since the late 1990s; many BSD systems use it to avoid the GPL license. AWK was preceded by sed (1974). Both were designed for text processing. They share the line-oriented, data-driven paradigm, and are particularly suited to writing one-liner programs, due to the implicit main loop and current line variables. The power and terseness of early AWK programs – notably the powerful regular expression handling and conciseness due to implicit variables, which facilitate one-liners – together with the limitations of AWK at the time, were important inspirations for the Perl language (1987). In the 1990s, Perl became very popular, competing with AWK in the niche of Unix text-processing languages. Structure of AWK programs An AWK program is a series of pattern action pairs, written as: condition { action } condition { action } ... where condition is typically an expression and action is a series of commands. The input is split into records, where by default records are separated by newline characters so that the input is split into lines. The program tests each record against each of the conditions in turn, and executes the action for each expression that is true. Either the condition or the action may be omitted. The condition defaults to matching every record. The default action is to print the record. This is the same pattern-action structure as sed. In addition to a simple AWK expression, such as foo == 1 or /^foo/, the condition can be BEGIN or END causing the action to be executed before or after all records have been read, or pattern1, pattern2 which matches the range of records starting with a record that matches pattern1 up to and including the record that matches pattern2 before again trying to match against pattern1 on subsequent lines. In addition to normal arithmetic and logical operators, AWK expressions include the tilde operator, ~, which matches a regular expression against a string. As handy syntactic sugar, /regexp/ without using the tilde operator matches against the current record; this syntax derives from sed, which in turn inherited it from the ed editor, where / is used for searching. This syntax of using slashes as delimiters for regular expressions was subsequently adopted by Perl and ECMAScript, and is now common. The tilde operator was also adopted by Perl. Commands AWK commands are the statements that are substituted for action in the examples above. AWK commands can include function calls, variable assignments, calculations, or any combination thereof. AWK contains built-in support for many functions; many more are provided by the various flavors of AWK. Also, some flavors support the inclusion of dynamically linked libraries, which can also provide more functions. The print command The print command is used to output text. The output text is always terminated with a predefined string called the output record separator (ORS) whose default value is a newline. The simplest form of this command is: print This displays the contents of the current record. In AWK, records are broken down into fields, and these can be displayed separately: print $1 Displays the first field of the current record print $1, $3 Displays the first and third fields of the current record, separated by a predefined string called the output field separator (OFS) whose default value is a single space character Although these fields ($X) may bear resemblance to variables (the $ symbol indicates variables in Perl), they actually refer to the fields of the current record. A special case, $0, refers to the entire record. In fact, the commands "print" and "print $0" are identical in functionality. The print command can also display the results of calculations and/or function calls: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print 3+2 print foobar(3) print foobar(variable) print sin(3-2) } Output may be sent to a file: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print "expression" > "file name" } or through a pipe: /regex_pattern/ { # Actions to perform in the event the record (line) matches the above regex_pattern print "expression" \| "command" } Built-in variables Awk's built-in variables include the field variables: $1, $2, $3, and so on ($0 represents the entire record). They hold the text or values in the individual text-fields in a record. Other variables include: NR: Number of Records. Keeps a current count of the number of input records read so far from all data files. It starts at zero, but is never automatically reset to zero. FNR: File Number of Records. Keeps a current count of the number of input records read so far in the current file. This variable is automatically reset to zero each time a new file is started. NF: Number of Fields. Contains the number of fields in the current input record. The last field in the input record can be designated by $NF, the 2nd-to-last field by $(NF-1), the 3rd-to-last field by $(NF-2), etc. FILENAME: Contains the name of the current input-file. FS: Field Separator. Contains the "field separator" used to divide fields in the input record. The default, "white space", allows any sequence of space and tab characters. FS can be reassigned with another character or character sequence to change the field separator. RS: Record Separator. Stores the current "record separator" character. Since, by default, an input line is the input record, the default record separator character is a "newline". OFS: Output Field Separator. Stores the "output field separator", which separates the fields when Awk prints them. The default is a "space" character. ORS: Output Record Separator. Stores the "output record separator", which separates the output records when Awk prints them. The default is a "newline" character. OFMT: Output Format. Stores the format for numeric output. The default format is "%.6g". Variables and syntax Variable names can use any of the characters [A-Za-z0-9_], with the exception of language keywords. The operators + - * / represent addition, subtraction, multiplication, and division, respectively. For string concatenation, simply place two variables (or string constants) next to each other. It is optional to use a space in between if string constants are involved, but two variable names placed adjacent to each other require a space in between. Double quotes delimit string constants. Statements need not end with semicolons. Finally, comments can be added to programs by using # as the first character on a line. User-defined functions In a format similar to C, function definitions consist of the keyword function, the function name, argument names and the function body. Here is an example of a function. function add_three (number) { return number + 3 } This statement can be invoked as follows: (pattern) { print add_three(36) # Outputs '''39''' } Functions can have variables that are in the local scope. The names of these are added to the end of the argument list, though values for these should be omitted when calling the function. It is convention to add some whitespace in the argument list before the local variables, to indicate where the parameters end and the local variables begin. Examples Hello World Here is the customary "Hello, world" program written in AWK: BEGIN { print "Hello, world!" exit } Print lines longer than 80 characters Print all lines longer than 80 characters. Note that the default action is to print the current line. length($0) > 80 Count words Count words in the input and print the number of lines, words, and characters (like wc): { words += NF chars += length + 1 # add one to account for the newline character at the end of each record (line) } END { print NR, words, chars } As there is no pattern for the first line of the program, every line of input matches by default, so the increment actions are executed for every line. Note that words += NF is shorthand for words = words + NF. Sum last word { s += $NF } END { print s + 0 } s is incremented by the numeric value of $NF, which is the last word on the line as defined by AWK's field separator (by default, white-space). NF is the number of fields in the current line, e.g. 4. Since $4 is the value of the fourth field, $NF is the value of the last field in the line regardless of how many fields this line has, or whether it has more or fewer fields than surrounding lines. $ is actually a unary operator with the highest operator precedence. (If the line has no fields, then NF is 0, $0 is the whole line, which in this case is empty apart from possible white-space, and so has the numeric value 0.) At the end of the input the END pattern matches, so s is printed. However, since there may have been no lines of input at all, in which case no value has ever been assigned to s, it will by default be an empty string. Adding zero to a variable is an AWK idiom for coercing it from a string to a numeric value. (Concatenating an empty string is to coerce from a number to a string, e.g. s "". Note, there's no operator to concatenate strings, they're just placed adjacently.) With the coercion the program prints "0" on an empty input, without it, an empty line is printed. Match a range of input lines NR % 4 == 1, NR % 4 == 3 { printf "%6d %s\n", NR, $0 } The action statement prints each line numbered. The printf function emulates the standard C printf and works similarly to the print command described above. The pattern to match, however, works as follows: NR is the number of records, typically lines of input, AWK has so far read, i.e. the current line number, starting at 1 for the first line of input. % is the modulo operator. NR % 4 == 1 is true for the 1st, 5th, 9th, etc., lines of input. Likewise, NR % 4 == 3 is true for the 3rd, 7th, 11th, etc., lines of input. The range pattern is false until the first part matches, on line 1, and then remains true up to and including when the second part matches, on line 3. It then stays false until the first part matches again on line 5. Thus, the program prints lines 1,2,3, skips line 4, and then 5,6,7, and so on. For each line, it prints the line number (on a 6 character-wide field) and then the line contents. For example, when executed on this input: Rome Florence Milan Naples Turin Venice The previous program prints: 1 Rome 2 Florence 3 Milan 5 Turin 6 Venice Printing the initial or the final part of a file As a special case, when the first part of a range pattern is constantly true, e.g. 1, the range will start at the beginning of the input. Similarly, if the second part is constantly false, e.g. 0, the range will continue until the end of input. For example, /^--cut here--$/, 0 prints lines of input from the first line matching the regular expression ^--cut here--$, that is, a line containing only the phrase "--cut here--", to the end. Calculate word frequencies Word frequency using associative arrays: BEGIN { FS="[^a-zA-Z]+" } { for (i=1; i<=NF; i++) words[tolower($i)]++ } END { for (i in words) print i, words[i] } The BEGIN block sets the field separator to any sequence of non-alphabetic characters. Note that separators can be regular expressions. After that, we get to a bare action, which performs the action on every input line. In this case, for every field on the line, we add one to the number of times that word, first converted to lowercase, appears. Finally, in the END block, we print the words with their frequencies. The line for (i in words) creates a loop that goes through the array words, setting i to each subscript of the array. This is different from most languages, where such a loop goes through each value in the array. The loop thus prints out each word followed by its frequency count. tolower was an addition to the One True awk (see below) made after the book was published. Match pattern from command line This program can be represented in several ways. The first one uses the Bourne shell to make a shell script that does everything. It is the shortest of these methods: #!/bin/sh pattern="$1" shift awk '/'"$pattern"'/ { print FILENAME ":" $0 }' "$@" The $pattern in the awk command is not protected by single quotes so that the shell does expand the variable but it needs to be put in double quotes to properly handle patterns containing spaces. A pattern by itself in the usual way checks to see if the whole line ($0) matches. FILENAME contains the current filename. awk has no explicit concatenation operator; two adjacent strings concatenate them. $0 expands to the original unchanged input line. There are alternate ways of writing this. This shell script accesses the environment directly from within awk: #!/bin/sh export pattern="$1" shift awk '$0 ~ ENVIRON["pattern"] { print FILENAME ":" $0 }' "$@" This is a shell script that uses ENVIRON, an array introduced in a newer version of the One True awk after the book was published. The subscript of ENVIRON is the name of an environment variable; its result is the variable's value. This is like the getenv function in various standard libraries and POSIX. The shell script makes an environment variable pattern containing the first argument, then drops that argument and has awk look for the pattern in each file. ~ checks to see if its left operand matches its right operand; !~ is its inverse. Note that a regular expression is just a string and can be stored in variables. The next way uses command-line variable assignment, in which an argument to awk can be seen as an assignment to a variable: #!/bin/sh pattern="$1" shift awk '$0 ~ pattern { print FILENAME ":" $0 }' "pattern=$pattern" "$@" Or You can use the -v var=value command line option (e.g. awk -v pattern="$pattern" ...). Finally, this is written in pure awk, without help from a shell or without the need to know too much about the implementation of the awk script (as the variable assignment on command line one does), but is a bit lengthy: BEGIN { pattern = ARGV[1] for (i = 1; i < ARGC; i++) # remove first argument ARGV[i] = ARGV[i + 1] ARGC-- if (ARGC == 1) { # the pattern was the only thing, so force read from standard input (used by book) ARGC = 2 ARGV[1] = "-" } } $0 ~ pattern { print FILENAME ":" $0 } The BEGIN is necessary not only to extract the first argument, but also to prevent it from being interpreted as a filename after the BEGIN block ends. ARGC, the number of arguments, is always guaranteed to be ≥1, as ARGV[0] is the name of the command that executed the script, most often the string "awk". Also note that ARGV[ARGC] is the empty string, "". # initiates a comment that expands to the end of the line. Note the if block. awk only checks to see if it should read from standard input before it runs the command. This means that awk 'prog' only works because the fact that there are no filenames is only checked before prog is run! If you explicitly set ARGC to 1 so that there are no arguments, awk will simply quit because it feels there are no more input files. Therefore, you need to explicitly say to read from standard input with the special filename -. Self-contained AWK scripts On Unix-like operating systems self-contained AWK scripts can be constructed using the shebang syntax. For example, a script that prints the content of a given file may be built by creating a file named print.awk with the following content: #!/usr/bin/awk -f { print $0 } It can be invoked with: ./print.awk <filename> The -f tells AWK that the argument that follows is the file to read the AWK program from, which is the same flag that is used in sed. Since they are often used for one-liners, both these programs default to executing a program given as a command-line argument, rather than a separate file. Versions and implementations AWK was originally written in 1977 and distributed with Version 7 Unix. In 1985 its authors started expanding the language, most significantly by adding user-defined functions. The language is described in the book The AWK Programming Language, published 1988, and its implementation was made available in releases of UNIX System V. To avoid confusion with the incompatible older version, this version was sometimes called "new awk" or nawk. This implementation was released under a free software license in 1996 and is still maintained by Brian Kernighan (see external links below). Old versions of Unix, such as UNIX/32V, included awkcc, which converted AWK to C. Kernighan wrote a program to turn awk into C++; its state is not known. BWK awk, also known as nawk, refers to the version by Brian Kernighan. It has been dubbed the "One True AWK" because of the use of the term in association with the book that originally described the language and the fact that Kernighan was one of the original authors of AWK. FreeBSD refers to this version as one-true-awk. This version also has features not in the book, such as tolower and ENVIRON that are explained above; see the FIXES file in the source archive for details. This version is used by, for example, Android, FreeBSD, NetBSD, OpenBSD, macOS, and illumos. Brian Kernighan and Arnold Robbins are the main contributors to a source repository for nawk: . gawk (GNU awk) is another free-software implementation and the only implementation that makes serious progress implementing internationalization and localization and TCP/IP networking. It was written before the original implementation became freely available. It includes its own debugger, and its profiler enables the user to make measured performance enhancements to a script. It also enables the user to extend functionality with shared libraries. Some Linux distributions include gawk as their default AWK implementation. As of version 5.2 (September 2022) gawk includes a persistent memory feature that can remember script-defined variables and functions from one invocation of a script to the next and pass data between unrelated scripts, as described in the Persistent-Memory gawk User Manual: . gawk-csv. The CSV extension of gawk provides facilities for handling input and output CSV formatted data. mawk is a very fast AWK implementation by Mike Brennan based on a bytecode interpreter. libmawk is a fork of mawk, allowing applications to embed multiple parallel instances of awk interpreters. awka (whose front end is written atop the mawk program) is another translator of AWK scripts into C code. When compiled, statically including the author's libawka.a, the resulting executables are considerably sped up and, according to the author's tests, compare very well with other versions of AWK, Perl, or Tcl. Small scripts will turn into programs of 160–170 kB. tawk (Thompson AWK) is an AWK compiler for Solaris, DOS, OS/2, and Windows, previously sold by Thompson Automation Software (which has ceased its activities). Jawk is a project to implement AWK in Java, hosted on SourceForge. Extensions to the language are added to provide access to Java features within AWK scripts (i.e., Java threads, sockets, collections, etc.). xgawk is a fork of gawk that extends gawk with dynamically loadable libraries. The XMLgawk extension was integrated into the official GNU Awk release 4.1.0. QSEAWK is an embedded AWK interpreter implementation included in the QSE library that provides embedding application programming interface (API) for C and C++. libfawk is a very small, function-only, reentrant, embeddable interpreter written in C BusyBox includes an AWK implementation written by Dmitry Zakharov. This is a very small implementation suitable for embedded systems. CLAWK by Michael Parker provides an AWK implementation in Common Lisp, based upon the regular expression library of the same author. Books See also Data transformation Event-driven programming List of Unix commands sed References Further reading – Interview with Alfred V. Aho on AWK AWK – Become an expert in 60 minutes External links The Amazing Awk Assembler by Henry Spencer. awklang.org The site for things related to the awk language 1977 software Cross-platform software Domain-specific programming languages Free compilers and interpreters Pattern matching programming languages Plan 9 commands Programming languages created in 1977 Scripting languages Standard Unix programs Text-oriented programming languages Unix SUS2008 utilities Unix text processing utilities	9
The Apollo program, also known as Project Apollo, was the United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which succeeded in preparing and landing the first humans on the Moon from 1968 to 1972. It was first conceived in 1960 during President Dwight D. Eisenhower's administration as a three-person spacecraft to follow the one-person Project Mercury, which put the first Americans in space. Apollo was later dedicated to President John F. Kennedy's national goal for the 1960s of "landing a man on the Moon and returning him safely to the Earth" in an address to Congress on May 25, 1961. It was the third US human spaceflight program to fly, preceded by the two-person Project Gemini conceived in 1961 to extend spaceflight capability in support of Apollo. Kennedy's goal was accomplished on the Apollo 11 mission when astronauts Neil Armstrong and Buzz Aldrin landed their Apollo Lunar Module (LM) on July 20, 1969, and walked on the lunar surface, while Michael Collins remained in lunar orbit in the command and service module (CSM), and all three landed safely on Earth in the Pacific Ocean on July 24. Five subsequent Apollo missions also landed astronauts on the Moon, the last, Apollo 17, in December 1972. In these six spaceflights, twelve people walked on the Moon. Apollo ran from 1961 to 1972, with the first crewed flight in 1968. It encountered a major setback in 1967 when an Apollo 1 cabin fire killed the entire crew during a prelaunch test. After the first successful landing, sufficient flight hardware remained for nine follow-on landings with a plan for extended lunar geological and astrophysical exploration. Budget cuts forced the cancellation of three of these. Five of the remaining six missions achieved successful landings, but the Apollo 13 landing was prevented by an oxygen tank explosion in transit to the Moon, crippling the CSM. The crew barely returned to Earth safely by using the lunar module as a "lifeboat" on the return journey. Apollo used the Saturn family of rockets as launch vehicles, which were also used for an Apollo Applications Program, which consisted of Skylab, a space station that supported three crewed missions in 1973–1974, and the Apollo–Soyuz Test Project, a joint United States-Soviet Union low Earth orbit mission in 1975. Apollo set several major human spaceflight milestones. It stands alone in sending crewed missions beyond low Earth orbit. Apollo 8 was the first crewed spacecraft to orbit another celestial body, and Apollo 11 was the first crewed spacecraft to land humans on one. Overall, the Apollo program returned of lunar rocks and soil to Earth, greatly contributing to the understanding of the Moon's composition and geological history. The program laid the foundation for NASA's subsequent human spaceflight capability and funded construction of its Johnson Space Center and Kennedy Space Center. Apollo also spurred advances in many areas of technology incidental to rocketry and human spaceflight, including avionics, telecommunications, and computers. Name The program was named after Apollo, the Greek god of light, music, and the Sun, by NASA manager Abe Silverstein, who later said, "I was naming the spacecraft like I'd name my baby." Silverstein chose the name at home one evening, early in 1960, because he felt "Apollo riding his chariot across the Sun was appropriate to the grand scale of the proposed program". The context of this was that the program focused at its beginning mainly on developing an advanced crewed spacecraft, the Apollo command and service module, succeeding the Mercury program. A lunar landing became the focus of the program only in 1961. Thereafter Project Gemini instead followed the Mercury program to test and study advanced crewed spaceflight technology. Background Origin and spacecraft feasibility studies The Apollo program was conceived during the Eisenhower administration in early 1960, as a follow-up to Project Mercury. While the Mercury capsule could support only one astronaut on a limited Earth orbital mission, Apollo would carry three. Possible missions included ferrying crews to a space station, circumlunar flights, and eventual crewed lunar landings. In July 1960, NASA Deputy Administrator Hugh L. Dryden announced the Apollo program to industry representatives at a series of Space Task Group conferences. Preliminary specifications were laid out for a spacecraft with a mission module cabin separate from the command module (piloting and reentry cabin), and a propulsion and equipment module. On August 30, a feasibility study competition was announced, and on October 25, three study contracts were awarded to General Dynamics/Convair, General Electric, and the Glenn L. Martin Company. Meanwhile, NASA performed its own in-house spacecraft design studies led by Maxime Faget, to serve as a gauge to judge and monitor the three industry designs. Political pressure builds In November 1960, John F. Kennedy was elected president after a campaign that promised American superiority over the Soviet Union in the fields of space exploration and missile defense. Up to the election of 1960, Kennedy had been speaking out against the "missile gap" that he and many other senators felt had developed between the Soviet Union and the United States due to the inaction of President Eisenhower. Beyond military power, Kennedy used aerospace technology as a symbol of national prestige, pledging to make the US not "first but, first and, first if, but first period". Despite Kennedy's rhetoric, he did not immediately come to a decision on the status of the Apollo program once he became president. He knew little about the technical details of the space program, and was put off by the massive financial commitment required by a crewed Moon landing. When Kennedy's newly appointed NASA Administrator James E. Webb requested a 30 percent budget increase for his agency, Kennedy supported an acceleration of NASA's large booster program but deferred a decision on the broader issue. On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to fly in space, reinforcing American fears about being left behind in a technological competition with the Soviet Union. At a meeting of the US House Committee on Science and Astronautics one day after Gagarin's flight, many congressmen pledged their support for a crash program aimed at ensuring that America would catch up. Kennedy was circumspect in his response to the news, refusing to make a commitment on America's response to the Soviets. On April 20, Kennedy sent a memo to Vice President Lyndon B. Johnson, asking Johnson to look into the status of America's space program, and into programs that could offer NASA the opportunity to catch up. Johnson responded approximately one week later, concluding that "we are neither making maximum effort nor achieving results necessary if this country is to reach a position of leadership." His memo concluded that a crewed Moon landing was far enough in the future that it was likely the United States would achieve it first. On May 25, 1961, twenty days after the first US crewed spaceflight Freedom 7, Kennedy proposed the crewed Moon landing in a Special Message to the Congress on Urgent National Needs: NASA expansion At the time of Kennedy's proposal, only one American had flown in space—less than a month earlier—and NASA had not yet sent an astronaut into orbit. Even some NASA employees doubted whether Kennedy's ambitious goal could be met. By 1963, Kennedy even came close to agreeing to a joint US-USSR Moon mission, to eliminate duplication of effort. With the clear goal of a crewed landing replacing the more nebulous goals of space stations and circumlunar flights, NASA decided that, in order to make progress quickly, it would discard the feasibility study designs of Convair, GE, and Martin, and proceed with Faget's command and service module design. The mission module was determined to be useful only as an extra room, and therefore unnecessary. They used Faget's design as the specification for another competition for spacecraft procurement bids in October 1961. On November 28, 1961, it was announced that North American Aviation had won the contract, although its bid was not rated as good as the Martin proposal. Webb, Dryden and Robert Seamans chose it in preference due to North American's longer association with NASA and its predecessor. Landing humans on the Moon by the end of 1969 required the most sudden burst of technological creativity, and the largest commitment of resources ($25 billion; $ in US dollars) ever made by any nation in peacetime. At its peak, the Apollo program employed 400,000 people and required the support of over 20,000 industrial firms and universities. On July 1, 1960, NASA established the Marshall Space Flight Center (MSFC) in Huntsville, Alabama. MSFC designed the heavy lift-class Saturn launch vehicles, which would be required for Apollo. Manned Spacecraft Center It became clear that managing the Apollo program would exceed the capabilities of Robert R. Gilruth's Space Task Group, which had been directing the nation's crewed space program from NASA's Langley Research Center. So Gilruth was given authority to grow his organization into a new NASA center, the Manned Spacecraft Center (MSC). A site was chosen in Houston, Texas, on land donated by Rice University, and Administrator Webb announced the conversion on September 19, 1961. It was also clear NASA would soon outgrow its practice of controlling missions from its Cape Canaveral Air Force Station launch facilities in Florida, so a new Mission Control Center would be included in the MSC. In September 1962, by which time two Project Mercury astronauts had orbited the Earth, Gilruth had moved his organization to rented space in Houston, and construction of the MSC facility was under way, Kennedy visited Rice to reiterate his challenge in a famous speech: The MSC was completed in September 1963. It was renamed by the US Congress in honor of Lyndon Johnson soon after his death in 1973. Launch Operations Center It also became clear that Apollo would outgrow the Canaveral launch facilities in Florida. The two newest launch complexes were already being built for the Saturn I and IB rockets at the northernmost end: LC-34 and LC-37. But an even bigger facility would be needed for the mammoth rocket required for the crewed lunar mission, so land acquisition was started in July 1961 for a Launch Operations Center (LOC) immediately north of Canaveral at Merritt Island. The design, development and construction of the center was conducted by Kurt H. Debus, a member of Wernher von Braun's original V-2 rocket engineering team. Debus was named the LOC's first Director. Construction began in November 1962. Following Kennedy's death, President Johnson issued an executive order on November 29, 1963, to rename the LOC and Cape Canaveral in honor of Kennedy. The LOC included Launch Complex 39, a Launch Control Center, and a Vertical Assembly Building (VAB). in which the space vehicle (launch vehicle and spacecraft) would be assembled on a mobile launcher platform and then moved by a crawler-transporter to one of several launch pads. Although at least three pads were planned, only two, designated AandB, were completed in October 1965. The LOC also included an Operations and Checkout Building (OCB) to which Gemini and Apollo spacecraft were initially received prior to being mated to their launch vehicles. The Apollo spacecraft could be tested in two vacuum chambers capable of simulating atmospheric pressure at altitudes up to , which is nearly a vacuum. Organization Administrator Webb realized that in order to keep Apollo costs under control, he had to develop greater project management skills in his organization, so he recruited George E. Mueller for a high management job. Mueller accepted, on the condition that he have a say in NASA reorganization necessary to effectively administer Apollo. Webb then worked with Associate Administrator (later Deputy Administrator) Seamans to reorganize the Office of Manned Space Flight (OMSF). On July 23, 1963, Webb announced Mueller's appointment as Deputy Associate Administrator for Manned Space Flight, to replace then Associate Administrator D. Brainerd Holmes on his retirement effective September 1. Under Webb's reorganization, the directors of the Manned Spacecraft Center (Gilruth), Marshall Space Flight Center (von Braun), and the Launch Operations Center (Debus) reported to Mueller. Based on his industry experience on Air Force missile projects, Mueller realized some skilled managers could be found among high-ranking officers in the U.S. Air Force, so he got Webb's permission to recruit General Samuel C. Phillips, who gained a reputation for his effective management of the Minuteman program, as OMSF program controller. Phillips's superior officer Bernard A. Schriever agreed to loan Phillips to NASA, along with a staff of officers under him, on the condition that Phillips be made Apollo Program Director. Mueller agreed, and Phillips managed Apollo from January 1964, until it achieved the first human landing in July 1969, after which he returned to Air Force duty. Charles Fishman, in One Giant Leap, estimated the number of people and organizations involved into the Apollo program as "410,000 men and women at some 20,000 different companies contributed to the effort". Choosing a mission mode Once Kennedy had defined a goal, the Apollo mission planners were faced with the challenge of designing a spacecraft that could meet it while minimizing risk to human life, cost, and demands on technology and astronaut skill. Four possible mission modes were considered: Direct Ascent: The spacecraft would be launched as a unit and travel directly to the lunar surface, without first going into lunar orbit. A Earth return ship would land all three astronauts atop a descent propulsion stage, which would be left on the Moon. This design would have required development of the extremely powerful Saturn C-8 or Nova launch vehicle to carry a payload to the Moon. Earth Orbit Rendezvous (EOR): Multiple rocket launches (up to 15 in some plans) would carry parts of the Direct Ascent spacecraft and propulsion units for translunar injection (TLI). These would be assembled into a single spacecraft in Earth orbit. Lunar Surface Rendezvous: Two spacecraft would be launched in succession. The first, an automated vehicle carrying propellant for the return to Earth, would land on the Moon, to be followed some time later by the crewed vehicle. Propellant would have to be transferred from the automated vehicle to the crewed vehicle. Lunar Orbit Rendezvous (LOR): This turned out to be the winning configuration, which achieved the goal with Apollo 11 on July 20, 1969: a single Saturn V launched a spacecraft that was composed of a Apollo command and service module which remained in orbit around the Moon and a two-stage Apollo Lunar Module spacecraft which was flown by two astronauts to the surface, flown back to dock with the command module and was then discarded. Landing the smaller spacecraft on the Moon, and returning an even smaller part () to lunar orbit, minimized the total mass to be launched from Earth, but this was the last method initially considered because of the perceived risk of rendezvous and docking. In early 1961, direct ascent was generally the mission mode in favor at NASA. Many engineers feared that rendezvous and docking, maneuvers that had not been attempted in Earth orbit, would be nearly impossible in lunar orbit. LOR advocates including John Houbolt at Langley Research Center emphasized the important weight reductions that were offered by the LOR approach. Throughout 1960 and 1961, Houbolt campaigned for the recognition of LOR as a viable and practical option. Bypassing the NASA hierarchy, he sent a series of memos and reports on the issue to Associate Administrator Robert Seamans; while acknowledging that he spoke "somewhat as a voice in the wilderness", Houbolt pleaded that LOR should not be discounted in studies of the question. Seamans's establishment of an ad hoc committee headed by his special technical assistant Nicholas E. Golovin in July 1961, to recommend a launch vehicle to be used in the Apollo program, represented a turning point in NASA's mission mode decision. This committee recognized that the chosen mode was an important part of the launch vehicle choice, and recommended in favor of a hybrid EOR-LOR mode. Its consideration of LOR—as well as Houbolt's ceaseless work—played an important role in publicizing the workability of the approach. In late 1961 and early 1962, members of the Manned Spacecraft Center began to come around to support LOR, including the newly hired deputy director of the Office of Manned Space Flight, Joseph Shea, who became a champion of LOR. The engineers at Marshall Space Flight Center (MSFC), which had much to lose from the decision, took longer to become convinced of its merits, but their conversion was announced by Wernher von Braun at a briefing on June 7, 1962. But even after NASA reached internal agreement, it was far from smooth sailing. Kennedy's science advisor Jerome Wiesner, who had expressed his opposition to human spaceflight to Kennedy before the President took office, and had opposed the decision to land people on the Moon, hired Golovin, who had left NASA, to chair his own "Space Vehicle Panel", ostensibly to monitor, but actually to second-guess NASA's decisions on the Saturn V launch vehicle and LOR by forcing Shea, Seamans, and even Webb to defend themselves, delaying its formal announcement to the press on July 11, 1962, and forcing Webb to still hedge the decision as "tentative". Wiesner kept up the pressure, even making the disagreement public during a two-day September visit by the President to Marshall Space Flight Center. Wiesner blurted out "No, that's no good" in front of the press, during a presentation by von Braun. Webb jumped in and defended von Braun, until Kennedy ended the squabble by stating that the matter was "still subject to final review". Webb held firm and issued a request for proposal to candidate Lunar Excursion Module (LEM) contractors. Wiesner finally relented, unwilling to settle the dispute once and for all in Kennedy's office, because of the President's involvement with the October Cuban Missile Crisis, and fear of Kennedy's support for Webb. NASA announced the selection of Grumman as the LEM contractor in November 1962. Space historian James Hansen concludes that: The LOR method had the advantage of allowing the lander spacecraft to be used as a "lifeboat" in the event of a failure of the command ship. Some documents prove this theory was discussed before and after the method was chosen. In 1964 an MSC study concluded, "The LM [as lifeboat]... was finally dropped, because no single reasonable CSM failure could be identified that would prohibit use of the SPS." Ironically, just such a failure happened on Apollo 13 when an oxygen tank explosion left the CSM without electrical power. The lunar module provided propulsion, electrical power and life support to get the crew home safely. Spacecraft Faget's preliminary Apollo design employed a cone-shaped command module, supported by one of several service modules providing propulsion and electrical power, sized appropriately for the space station, cislunar, and lunar landing missions. Once Kennedy's Moon landing goal became official, detailed design began of a command and service module (CSM) in which the crew would spend the entire direct-ascent mission and lift off from the lunar surface for the return trip, after being soft-landed by a larger landing propulsion module. The final choice of lunar orbit rendezvous changed the CSM's role to the translunar ferry used to transport the crew, along with a new spacecraft, the Lunar Excursion Module (LEM, later shortened to LM (Lunar Module) but still pronounced ) which would take two individuals to the lunar surface and return them to the CSM. Command and service module The command module (CM) was the conical crew cabin, designed to carry three astronauts from launch to lunar orbit and back to an Earth ocean landing. It was the only component of the Apollo spacecraft to survive without major configuration changes as the program evolved from the early Apollo study designs. Its exterior was covered with an ablative heat shield, and had its own reaction control system (RCS) engines to control its attitude and steer its atmospheric entry path. Parachutes were carried to slow its descent to splashdown. The module was tall, in diameter, and weighed approximately . A cylindrical service module (SM) supported the command module, with a service propulsion engine and an RCS with propellants, and a fuel cell power generation system with liquid hydrogen and liquid oxygen reactants. A high-gain S-band antenna was used for long-distance communications on the lunar flights. On the extended lunar missions, an orbital scientific instrument package was carried. The service module was discarded just before reentry. The module was long and in diameter. The initial lunar flight version weighed approximately fully fueled, while a later version designed to carry a lunar orbit scientific instrument package weighed just over . North American Aviation won the contract to build the CSM, and also the second stage of the Saturn V launch vehicle for NASA. Because the CSM design was started early before the selection of lunar orbit rendezvous, the service propulsion engine was sized to lift the CSM off the Moon, and thus was oversized to about twice the thrust required for translunar flight. Also, there was no provision for docking with the lunar module. A 1964 program definition study concluded that the initial design should be continued as Block I which would be used for early testing, while Block II, the actual lunar spacecraft, would incorporate the docking equipment and take advantage of the lessons learned in Block I development. Apollo Lunar Module The Apollo Lunar Module (LM) was designed to descend from lunar orbit to land two astronauts on the Moon and take them back to orbit to rendezvous with the command module. Not designed to fly through the Earth's atmosphere or return to Earth, its fuselage was designed totally without aerodynamic considerations and was of an extremely lightweight construction. It consisted of separate descent and ascent stages, each with its own engine. The descent stage contained storage for the descent propellant, surface stay consumables, and surface exploration equipment. The ascent stage contained the crew cabin, ascent propellant, and a reaction control system. The initial LM model weighed approximately , and allowed surface stays up to around 34 hours. An extended lunar module weighed over , and allowed surface stays of more than three days. The contract for design and construction of the lunar module was awarded to Grumman Aircraft Engineering Corporation, and the project was overseen by Thomas J. Kelly. Launch vehicles Before the Apollo program began, Wernher von Braun and his team of rocket engineers had started work on plans for very large launch vehicles, the Saturn series, and the even larger Nova series. In the midst of these plans, von Braun was transferred from the Army to NASA and was made Director of the Marshall Space Flight Center. The initial direct ascent plan to send the three-person Apollo command and service module directly to the lunar surface, on top of a large descent rocket stage, would require a Nova-class launcher, with a lunar payload capability of over . The June 11, 1962, decision to use lunar orbit rendezvous enabled the Saturn V to replace the Nova, and the MSFC proceeded to develop the Saturn rocket family for Apollo. Since Apollo, like Mercury, used more than one launch vehicle for space missions, NASA used spacecraft-launch vehicle combination series numbers: AS-10x for Saturn I, AS-20x for Saturn IB, and AS-50x for Saturn V (compare Mercury-Redstone 3, Mercury-Atlas 6) to designate and plan all missions, rather than numbering them sequentially as in Project Gemini. This was changed by the time human flights began. Little Joe II Since Apollo, like Mercury, would require a launch escape system (LES) in case of a launch failure, a relatively small rocket was required for qualification flight testing of this system. A rocket bigger than the Little Joe used by Mercury would be required, so the Little Joe II was built by General Dynamics/Convair. After an August 1963 qualification test flight, four LES test flights (A-001 through 004) were made at the White Sands Missile Range between May 1964 and January 1966. Saturn I Saturn I, the first US heavy lift launch vehicle, was initially planned to launch partially equipped CSMs in low Earth orbit tests. The S-I first stage burned RP-1 with liquid oxygen (LOX) oxidizer in eight clustered Rocketdyne H-1 engines, to produce of thrust. The S-IV second stage used six liquid hydrogen-fueled Pratt & Whitney RL-10 engines with of thrust. The S-V third stage flew inactively on Saturn I four times. The first four Saturn I test flights were launched from LC-34, with only the first stage live, carrying dummy upper stages filled with water. The first flight with a live S-IV was launched from LC-37. This was followed by five launches of boilerplate CSMs (designated AS-101 through AS-105) into orbit in 1964 and 1965. The last three of these further supported the Apollo program by also carrying Pegasus satellites, which verified the safety of the translunar environment by measuring the frequency and severity of micrometeorite impacts. In September 1962, NASA planned to launch four crewed CSM flights on the Saturn I from late 1965 through 1966, concurrent with Project Gemini. The payload capacity would have severely limited the systems which could be included, so the decision was made in October 1963 to use the uprated Saturn IB for all crewed Earth orbital flights. Saturn IB The Saturn IB was an upgraded version of the Saturn I. The S-IB first stage increased the thrust to by uprating the H-1 engine. The second stage replaced the S-IV with the S-IVB-200, powered by a single J-2 engine burning liquid hydrogen fuel with LOX, to produce of thrust. A restartable version of the S-IVB was used as the third stage of the Saturn V. The Saturn IB could send over into low Earth orbit, sufficient for a partially fueled CSM or the LM. Saturn IB launch vehicles and flights were designated with an AS-200 series number, "AS" indicating "Apollo Saturn" and the "2" indicating the second member of the Saturn rocket family. Saturn V Saturn V launch vehicles and flights were designated with an AS-500 series number, "AS" indicating "Apollo Saturn" and the "5" indicating Saturn V. The three-stage Saturn V was designed to send a fully fueled CSM and LM to the Moon. It was in diameter and stood tall with its lunar payload. Its capability grew to for the later advanced lunar landings. The S-IC first stage burned RP-1/LOX for a rated thrust of , which was upgraded to . The second and third stages burned liquid hydrogen; the third stage was a modified version of the S-IVB, with thrust increased to and capability to restart the engine for translunar injection after reaching a parking orbit. Astronauts NASA's director of flight crew operations during the Apollo program was Donald K. "Deke" Slayton, one of the original Mercury Seven astronauts who was medically grounded in September 1962 due to a heart murmur. Slayton was responsible for making all Gemini and Apollo crew assignments. Thirty-two astronauts were assigned to fly missions in the Apollo program. Twenty-four of these left Earth's orbit and flew around the Moon between December 1968 and December 1972 (three of them twice). Half of the 24 walked on the Moon's surface, though none of them returned to it after landing once. One of the moonwalkers was a trained geologist. Of the 32, Gus Grissom, Ed White, and Roger Chaffee were killed during a ground test in preparation for the Apollo 1 mission. The Apollo astronauts were chosen from the Project Mercury and Gemini veterans, plus from two later astronaut groups. All missions were commanded by Gemini or Mercury veterans. Crews on all development flights (except the Earth orbit CSM development flights) through the first two landings on Apollo 11 and Apollo 12, included at least two (sometimes three) Gemini veterans. Harrison Schmitt, a geologist, was the first NASA scientist astronaut to fly in space, and landed on the Moon on the last mission, Apollo 17. Schmitt participated in the lunar geology training of all of the Apollo landing crews. NASA awarded all 32 of these astronauts its highest honor, the Distinguished Service Medal, given for "distinguished service, ability, or courage", and personal "contribution representing substantial progress to the NASA mission". The medals were awarded posthumously to Grissom, White, and Chaffee in 1969, then to the crews of all missions from Apollo 8 onward. The crew that flew the first Earth orbital test mission Apollo 7, Walter M. Schirra, Donn Eisele, and Walter Cunningham, were awarded the lesser NASA Exceptional Service Medal, because of discipline problems with the flight director's orders during their flight. In October 2008, the NASA Administrator decided to award them the Distinguished Service Medals. For Schirra and Eisele, this was posthumously. Lunar mission profile The first lunar landing mission was planned to proceed: Profile variations The first three lunar missions (Apollo 8, Apollo 10, and Apollo 11) used a free return trajectory, keeping a flight path coplanar with the lunar orbit, which would allow a return to Earth in case the SM engine failed to make lunar orbit insertion. Landing site lighting conditions on later missions dictated a lunar orbital plane change, which required a course change maneuver soon after TLI, and eliminated the free-return option. After Apollo 12 placed the second of several seismometers on the Moon, the jettisoned LM ascent stages on Apollo 12 and later missions were deliberately crashed on the Moon at known locations to induce vibrations in the Moon's structure. The only exceptions to this were the Apollo 13 LM which burned up in the Earth's atmosphere, and Apollo 16, where a loss of attitude control after jettison prevented making a targeted impact. As another active seismic experiment, the S-IVBs on Apollo 13 and subsequent missions were deliberately crashed on the Moon instead of being sent to solar orbit. Starting with Apollo 13, descent orbit insertion was to be performed using the service module engine instead of the LM engine, in order to allow a greater fuel reserve for landing. This was actually done for the first time on Apollo 14, since the Apollo 13 mission was aborted before landing. Development history Uncrewed flight tests Two Block I CSMs were launched from LC-34 on suborbital flights in 1966 with the Saturn IB. The first, AS-201 launched on February 26, reached an altitude of and splashed down downrange in the Atlantic Ocean. The second, AS-202 on August 25, reached altitude and was recovered downrange in the Pacific Ocean. These flights validated the service module engine and the command module heat shield. A third Saturn IB test, AS-203 launched from pad 37, went into orbit to support design of the S-IVB upper stage restart capability needed for the Saturn V. It carried a nose cone instead of the Apollo spacecraft, and its payload was the unburned liquid hydrogen fuel, the behavior of which engineers measured with temperature and pressure sensors, and a TV camera. This flight occurred on July 5, before AS-202, which was delayed because of problems getting the Apollo spacecraft ready for flight. Preparation for crewed flight Two crewed orbital Block I CSM missions were planned: AS-204 and AS-205. The Block I crew positions were titled Command Pilot, Senior Pilot, and Pilot. The Senior Pilot would assume navigation duties, while the Pilot would function as a systems engineer. The astronauts would wear a modified version of the Gemini spacesuit. After an uncrewed LM test flight AS-206, a crew would fly the first Block II CSM and LM in a dual mission known as AS-207/208, or AS-278 (each spacecraft would be launched on a separate Saturn IB). The Block II crew positions were titled Commander, Command Module Pilot, and Lunar Module Pilot. The astronauts would begin wearing a new Apollo A6L spacesuit, designed to accommodate lunar extravehicular activity (EVA). The traditional visor helmet was replaced with a clear "fishbowl" type for greater visibility, and the lunar surface EVA suit would include a water-cooled undergarment. Deke Slayton, the grounded Mercury astronaut who became director of flight crew operations for the Gemini and Apollo programs, selected the first Apollo crew in January 1966, with Grissom as Command Pilot, White as Senior Pilot, and rookie Donn F. Eisele as Pilot. But Eisele dislocated his shoulder twice aboard the KC135 weightlessness training aircraft, and had to undergo surgery on January 27. Slayton replaced him with Chaffee. NASA announced the final crew selection for AS-204 on March 21, 1966, with the backup crew consisting of Gemini veterans James McDivitt and David Scott, with rookie Russell L. "Rusty" Schweickart. Mercury/Gemini veteran Wally Schirra, Eisele, and rookie Walter Cunningham were announced on September 29 as the prime crew for AS-205. In December 1966, the AS-205 mission was canceled, since the validation of the CSM would be accomplished on the 14-day first flight, and AS-205 would have been devoted to space experiments and contribute no new engineering knowledge about the spacecraft. Its Saturn IB was allocated to the dual mission, now redesignated AS-205/208 or AS-258, planned for August 1967. McDivitt, Scott and Schweickart were promoted to the prime AS-258 crew, and Schirra, Eisele and Cunningham were reassigned as the Apollo1 backup crew. Program delays The spacecraft for the AS-202 and AS-204 missions were delivered by North American Aviation to the Kennedy Space Center with long lists of equipment problems which had to be corrected before flight; these delays caused the launch of AS-202 to slip behind AS-203, and eliminated hopes the first crewed mission might be ready to launch as soon as November 1966, concurrently with the last Gemini mission. Eventually, the planned AS-204 flight date was pushed to February 21, 1967. North American Aviation was prime contractor not only for the Apollo CSM, but for the SaturnV S-II second stage as well, and delays in this stage pushed the first uncrewed SaturnV flight AS-501 from late 1966 to November 1967. (The initial assembly of AS-501 had to use a dummy spacer spool in place of the stage.) The problems with North American were severe enough in late 1965 to cause Manned Space Flight Administrator George Mueller to appoint program director Samuel Phillips to head a "tiger team" to investigate North American's problems and identify corrections. Phillips documented his findings in a December 19 letter to NAA president Lee Atwood, with a strongly worded letter by Mueller, and also gave a presentation of the results to Mueller and Deputy Administrator Robert Seamans. Meanwhile, Grumman was also encountering problems with the Lunar Module, eliminating hopes it would be ready for crewed flight in 1967, not long after the first crewed CSM flights. Apollo 1 fire Grissom, White, and Chaffee decided to name their flight Apollo1 as a motivational focus on the first crewed flight. They trained and conducted tests of their spacecraft at North American, and in the altitude chamber at the Kennedy Space Center. A "plugs-out" test was planned for January, which would simulate a launch countdown on LC-34 with the spacecraft transferring from pad-supplied to internal power. If successful, this would be followed by a more rigorous countdown simulation test closer to the February 21 launch, with both spacecraft and launch vehicle fueled. The plugs-out test began on the morning of January 27, 1967, and immediately was plagued with problems. First, the crew noticed a strange odor in their spacesuits which delayed the sealing of the hatch. Then, communications problems frustrated the astronauts and forced a hold in the simulated countdown. During this hold, an electrical fire began in the cabin and spread quickly in the high pressure, 100% oxygen atmosphere. Pressure rose high enough from the fire that the cabin inner wall burst, allowing the fire to erupt onto the pad area and frustrating attempts to rescue the crew. The astronauts were asphyxiated before the hatch could be opened. NASA immediately convened an accident review board, overseen by both houses of Congress. While the determination of responsibility for the accident was complex, the review board concluded that "deficiencies existed in command module design, workmanship and quality control". At the insistence of NASA Administrator Webb, North American removed Harrison Storms as command module program manager. Webb also reassigned Apollo Spacecraft Program Office (ASPO) Manager Joseph Francis Shea, replacing him with George Low. To remedy the causes of the fire, changes were made in the Block II spacecraft and operational procedures, the most important of which were use of a nitrogen/oxygen mixture instead of pure oxygen before and during launch, and removal of flammable cabin and space suit materials. The Block II design already called for replacement of the Block I plug-type hatch cover with a quick-release, outward opening door. NASA discontinued the crewed Block I program, using the BlockI spacecraft only for uncrewed SaturnV flights. Crew members would also exclusively wear modified, fire-resistant A7L Block II space suits, and would be designated by the Block II titles, regardless of whether a LM was present on the flight or not. Uncrewed Saturn V and LM tests On April 24, 1967, Mueller published an official Apollo mission numbering scheme, using sequential numbers for all flights, crewed or uncrewed. The sequence would start with Apollo 4 to cover the first three uncrewed flights while retiring the Apollo1 designation to honor the crew, per their widows' wishes. In September 1967, Mueller approved a sequence of mission types which had to be successfully accomplished in order to achieve the crewed lunar landing. Each step had to be successfully accomplished before the next ones could be performed, and it was unknown how many tries of each mission would be necessary; therefore letters were used instead of numbers. The A missions were uncrewed Saturn V validation; B was uncrewed LM validation using the Saturn IB; C was crewed CSM Earth orbit validation using the Saturn IB; D was the first crewed CSM/LM flight (this replaced AS-258, using a single Saturn V launch); E would be a higher Earth orbit CSM/LM flight; F would be the first lunar mission, testing the LM in lunar orbit but without landing (a "dress rehearsal"); and G would be the first crewed landing. The list of types covered follow-on lunar exploration to include H lunar landings, I for lunar orbital survey missions, and J for extended-stay lunar landings. The delay in the CSM caused by the fire enabled NASA to catch up on human-rating the LM and SaturnV. Apollo4 (AS-501) was the first uncrewed flight of the SaturnV, carrying a BlockI CSM on November 9, 1967. The capability of the command module's heat shield to survive a trans-lunar reentry was demonstrated by using the service module engine to ram it into the atmosphere at higher than the usual Earth-orbital reentry speed. Apollo 5 (AS-204) was the first uncrewed test flight of the LM in Earth orbit, launched from pad 37 on January 22, 1968, by the Saturn IB that would have been used for Apollo 1. The LM engines were successfully test-fired and restarted, despite a computer programming error which cut short the first descent stage firing. The ascent engine was fired in abort mode, known as a "fire-in-the-hole" test, where it was lit simultaneously with jettison of the descent stage. Although Grumman wanted a second uncrewed test, George Low decided the next LM flight would be crewed. This was followed on April 4, 1968, by Apollo 6 (AS-502) which carried a CSM and a LM Test Article as ballast. The intent of this mission was to achieve trans-lunar injection, followed closely by a simulated direct-return abort, using the service module engine to achieve another high-speed reentry. The Saturn V experienced pogo oscillation, a problem caused by non-steady engine combustion, which damaged fuel lines in the second and third stages. Two S-II engines shut down prematurely, but the remaining engines were able to compensate. The damage to the third stage engine was more severe, preventing it from restarting for trans-lunar injection. Mission controllers were able to use the service module engine to essentially repeat the flight profile of Apollo 4. Based on the good performance of Apollo6 and identification of satisfactory fixes to the Apollo6 problems, NASA declared the SaturnV ready to fly crew, canceling a third uncrewed test. Crewed development missions Apollo 7, launched from LC-34 on October 11, 1968, was the Cmission, crewed by Schirra, Eisele, and Cunningham. It was an 11-day Earth-orbital flight which tested the CSM systems. Apollo 8 was planned to be the D mission in December 1968, crewed by McDivitt, Scott and Schweickart, launched on a SaturnV instead of two Saturn IBs. In the summer it had become clear that the LM would not be ready in time. Rather than waste the Saturn V on another simple Earth-orbiting mission, ASPO Manager George Low suggested the bold step of sending Apollo8 to orbit the Moon instead, deferring the Dmission to the next mission in March 1969, and eliminating the E mission. This would keep the program on track. The Soviet Union had sent two tortoises, mealworms, wine flies, and other lifeforms around the Moon on September 15, 1968, aboard Zond 5, and it was believed they might soon repeat the feat with human cosmonauts. The decision was not announced publicly until successful completion of Apollo 7. Gemini veterans Frank Borman and Jim Lovell, and rookie William Anders captured the world's attention by making ten lunar orbits in 20 hours, transmitting television pictures of the lunar surface on Christmas Eve, and returning safely to Earth. The following March, LM flight, rendezvous and docking were successfully demonstrated in Earth orbit on Apollo 9, and Schweickart tested the full lunar EVA suit with its portable life support system (PLSS) outside the LM. The F mission was successfully carried out on Apollo 10 in May 1969 by Gemini veterans Thomas P. Stafford, John Young and Eugene Cernan. Stafford and Cernan took the LM to within of the lunar surface. The G mission was achieved on Apollo 11 in July 1969 by an all-Gemini veteran crew consisting of Neil Armstrong, Michael Collins and Buzz Aldrin. Armstrong and Aldrin performed the first landing at the Sea of Tranquility at 20:17:40 UTC on July 20, 1969. They spent a total of 21 hours, 36 minutes on the surface, and spent 2hours, 31 minutes outside the spacecraft, walking on the surface, taking photographs, collecting material samples, and deploying automated scientific instruments, while continuously sending black-and-white television back to Earth. The astronauts returned safely on July 24. Production lunar landings In November 1969, Charles "Pete" Conrad became the third person to step onto the Moon, which he did while speaking more informally than had Armstrong: Conrad and rookie Alan L. Bean made a precision landing of Apollo 12 within walking distance of the Surveyor 3 uncrewed lunar probe, which had landed in April 1967 on the Ocean of Storms. The command module pilot was Gemini veteran Richard F. Gordon Jr. Conrad and Bean carried the first lunar surface color television camera, but it was damaged when accidentally pointed into the Sun. They made two EVAs totaling 7hours and 45 minutes. On one, they walked to the Surveyor, photographed it, and removed some parts which they returned to Earth. The contracted batch of 15 Saturn Vs was enough for lunar landing missions through Apollo 20. Shortly after Apollo 11, NASA publicized a preliminary list of eight more planned landing sites after Apollo 12, with plans to increase the mass of the CSM and LM for the last five missions, along with the payload capacity of the Saturn V. These final missions would combine the I and J types in the 1967 list, allowing the CMP to operate a package of lunar orbital sensors and cameras while his companions were on the surface, and allowing them to stay on the Moon for over three days. These missions would also carry the Lunar Roving Vehicle (LRV) increasing the exploration area and allowing televised liftoff of the LM. Also, the Block II spacesuit was revised for the extended missions to allow greater flexibility and visibility for driving the LRV. The success of the first two landings allowed the remaining missions to be crewed with a single veteran as commander, with two rookies. Apollo 13 launched Lovell, Jack Swigert, and Fred Haise in April 1970, headed for the Fra Mauro formation. But two days out, a liquid oxygen tank exploded, disabling the service module and forcing the crew to use the LM as a "lifeboat" to return to Earth. Another NASA review board was convened to determine the cause, which turned out to be a combination of damage of the tank in the factory, and a subcontractor not making a tank component according to updated design specifications. Apollo was grounded again, for the remainder of 1970 while the oxygen tank was redesigned and an extra one was added. Mission cutbacks About the time of the first landing in 1969, it was decided to use an existing Saturn V to launch the Skylab orbital laboratory pre-built on the ground, replacing the original plan to construct it in orbit from several Saturn IB launches; this eliminated Apollo 20. NASA's yearly budget also began to shrink in light of the successful landing, and NASA also had to make funds available for the development of the upcoming Space Shuttle. By 1971, the decision was made to also cancel missions 18 and 19. The two unused Saturn Vs became museum exhibits at the John F. Kennedy Space Center on Merritt Island, Florida, George C. Marshall Space Center in Huntsville, Alabama, Michoud Assembly Facility in New Orleans, Louisiana, and Lyndon B. Johnson Space Center in Houston, Texas. The cutbacks forced mission planners to reassess the original planned landing sites in order to achieve the most effective geological sample and data collection from the remaining four missions. Apollo 15 had been planned to be the last of the H series missions, but since there would be only two subsequent missions left, it was changed to the first of three J missions. Apollo 13's Fra Mauro mission was reassigned to Apollo 14, commanded in February 1971 by Mercury veteran Alan Shepard, with Stuart Roosa and Edgar Mitchell. This time the mission was successful. Shepard and Mitchell spent 33 hours and 31 minutes on the surface, and completed two EVAs totalling 9hours 24 minutes, which was a record for the longest EVA by a lunar crew at the time. In August 1971, just after conclusion of the Apollo 15 mission, President Richard Nixon proposed canceling the two remaining lunar landing missions, Apollo 16 and 17. Office of Management and Budget Deputy Director Caspar Weinberger was opposed to this, and persuaded Nixon to keep the remaining missions. Extended missions Apollo 15 was launched on July 26, 1971, with David Scott, Alfred Worden and James Irwin. Scott and Irwin landed on July 30 near Hadley Rille, and spent just under two days, 19 hours on the surface. In over 18 hours of EVA, they collected about of lunar material. Apollo 16 landed in the Descartes Highlands on April 20, 1972. The crew was commanded by John Young, with Ken Mattingly and Charles Duke. Young and Duke spent just under three days on the surface, with a total of over 20 hours EVA. Apollo 17 was the last of the Apollo program, landing in the Taurus–Littrow region in December 1972. Eugene Cernan commanded Ronald E. Evans and NASA's first scientist-astronaut, geologist Harrison H. Schmitt. Schmitt was originally scheduled for Apollo 18, but the lunar geological community lobbied for his inclusion on the final lunar landing. Cernan and Schmitt stayed on the surface for just over three days and spent just over 23 hours of total EVA. Canceled missions Several missions were planned for but were canceled before details were finalized. Mission summary Source: Apollo by the Numbers: A Statistical Reference (Orloff 2004) Samples returned The Apollo program returned over of lunar rocks and soil to the Lunar Receiving Laboratory in Houston. Today, 75% of the samples are stored at the Lunar Sample Laboratory Facility built in 1979. The rocks collected from the Moon are extremely old compared to rocks found on Earth, as measured by radiometric dating techniques. They range in age from about 3.2 billion years for the basaltic samples derived from the lunar maria, to about 4.6 billion years for samples derived from the highlands crust. As such, they represent samples from a very early period in the development of the Solar System, that are largely absent on Earth. One important rock found during the Apollo Program is dubbed the Genesis Rock, retrieved by astronauts David Scott and James Irwin during the Apollo 15 mission. This anorthosite rock is composed almost exclusively of the calcium-rich feldspar mineral anorthite, and is believed to be representative of the highland crust. A geochemical component called KREEP was discovered by Apollo 12, which has no known terrestrial counterpart. KREEP and the anorthositic samples have been used to infer that the outer portion of the Moon was once completely molten (see lunar magma ocean). Almost all the rocks show evidence of impact process effects. Many samples appear to be pitted with micrometeoroid impact craters, which is never seen on Earth rocks, due to the thick atmosphere. Many show signs of being subjected to high-pressure shock waves that are generated during impact events. Some of the returned samples are of impact melt (materials melted near an impact crater.) All samples returned from the Moon are highly brecciated as a result of being subjected to multiple impact events. From analyses of the composition of the returned lunar samples, it is now believed that the Moon was created through the impact of a large astronomical body with Earth. Costs Apollo cost $25.4 billion (or approximately $ in dollars when adjusted for inflation via the GDP deflator index). Of this amount, $20.2 billion ($ adjusted) was spent on the design, development, and production of the Saturn family of launch vehicles, the Apollo spacecraft, spacesuits, scientific experiments, and mission operations. The cost of constructing and operating Apollo-related ground facilities, such as the NASA human spaceflight centers and the global tracking and data acquisition network, added an additional $5.2 billion ($ adjusted). The amount grows to $28 billion ($ adjusted) if the costs for related projects such as Project Gemini and the robotic Ranger, Surveyor, and Lunar Orbiter programs are included. NASA's official cost breakdown, as reported to Congress in the Spring of 1973, is as follows: Accurate estimates of human spaceflight costs were difficult in the early 1960s, as the capability was new and management experience was lacking. Preliminary cost analysis by NASA estimated $7 billion – $12 billion for a crewed lunar landing effort. NASA Administrator James Webb increased this estimate to $20 billion before reporting it to Vice President Johnson in April 1961. Project Apollo was a massive undertaking, representing the largest research and development project in peacetime. At its peak, it employed over 400,000 employees and contractors around the country and accounted for more than half of NASA's total spending in the 1960s. After the first Moon landing, public and political interest waned, including that of President Nixon, who wanted to rein in federal spending. NASA's budget could not sustain Apollo missions which cost, on average, $445 million ($ adjusted) each while simultaneously developing the Space Shuttle. The final fiscal year of Apollo funding was 1973. Apollo Applications Program Looking beyond the crewed lunar landings, NASA investigated several post-lunar applications for Apollo hardware. The Apollo Extension Series (Apollo X) proposed up to 30 flights to Earth orbit, using the space in the Spacecraft Lunar Module Adapter (SLA) to house a small orbital laboratory (workshop). Astronauts would continue to use the CSM as a ferry to the station. This study was followed by design of a larger orbital workshop to be built in orbit from an empty S-IVB Saturn upper stage and grew into the Apollo Applications Program (AAP). The workshop was to be supplemented by the Apollo Telescope Mount, which could be attached to the ascent stage of the lunar module via a rack. The most ambitious plan called for using an empty S-IVB as an interplanetary spacecraft for a Venus fly-by mission. The S-IVB orbital workshop was the only one of these plans to make it off the drawing board. Dubbed Skylab, it was assembled on the ground rather than in space, and launched in 1973 using the two lower stages of a Saturn V. It was equipped with an Apollo Telescope Mount. Skylab's last crew departed the station on February 8, 1974, and the station itself re-entered the atmosphere in 1979 after development of the Space Shuttle was delayed too long to save it. The Apollo–Soyuz program also used Apollo hardware for the first joint nation spaceflight, paving the way for future cooperation with other nations in the Space Shuttle and International Space Station programs. Recent observations In 2008, Japan Aerospace Exploration Agency's SELENE probe observed evidence of the halo surrounding the Apollo 15 Lunar Module blast crater while orbiting above the lunar surface. Beginning in 2009, NASA's robotic Lunar Reconnaissance Orbiter, while orbiting above the Moon, photographed the remnants of the Apollo program left on the lunar surface, and each site where crewed Apollo flights landed. All of the U.S. flags left on the Moon during the Apollo missions were found to still be standing, with the exception of the one left during the Apollo 11 mission, which was blown over during that mission's lift-off from the lunar surface; the degree to which these flags retain their original colors remains unknown. The flags cannot be seen through a telescope from Earth. In a November 16, 2009, editorial, The New York Times opined: Legacy Science and engineering The Apollo program has been described as the greatest technological achievement in human history. Apollo stimulated many areas of technology, leading to over 1,800 spinoff products as of 2015, including advances in the development of cordless power tools, fireproof materials, heart monitors, solar panels, digital imaging, and the use of liquid methane as fuel. The flight computer design used in both the lunar and command modules was, along with the Polaris and Minuteman missile systems, the driving force behind early research into integrated circuits (ICs). By 1963, Apollo was using 60 percent of the United States' production of ICs. The crucial difference between the requirements of Apollo and the missile programs was Apollo's much greater need for reliability. While the Navy and Air Force could work around reliability problems by deploying more missiles, the political and financial cost of failure of an Apollo mission was unacceptably high. Technologies and techniques required for Apollo were developed by Project Gemini. The Apollo project was enabled by NASA's adoption of new advances in semiconductor electronic technology, including metal–oxide–semiconductor field-effect transistors (MOSFETs) in the Interplanetary Monitoring Platform (IMP) and silicon integrated circuit chips in the Apollo Guidance Computer (AGC). Cultural impact The crew of Apollo 8 sent the first live televised pictures of the Earth and the Moon back to Earth, and read from the creation story in the Book of Genesis, on Christmas Eve 1968. An estimated one-quarter of the population of the world saw—either live or delayed—the Christmas Eve transmission during the ninth orbit of the Moon, and an estimated one-fifth of the population of the world watched the live transmission of the Apollo 11 moonwalk. The Apollo program also affected environmental activism in the 1970s due to photos taken by the astronauts. The most well known include Earthrise, taken by William Anders on Apollo 8, and The Blue Marble, taken by the Apollo 17 astronauts. The Blue Marble was released during a surge in environmentalism, and became a symbol of the environmental movement as a depiction of Earth's frailty, vulnerability, and isolation amid the vast expanse of space. According to The Economist, Apollo succeeded in accomplishing President Kennedy's goal of taking on the Soviet Union in the Space Race by accomplishing a singular and significant achievement, to demonstrate the superiority of the free-market system. The publication noted the irony that in order to achieve the goal, the program required the organization of tremendous public resources within a vast, centralized government bureaucracy. Apollo 11 broadcast data restoration project Prior to Apollo 11's 40th anniversary in 2009, NASA searched for the original videotapes of the mission's live televised moonwalk. After an exhaustive three-year search, it was concluded that the tapes had probably been erased and reused. A new digitally remastered version of the best available broadcast television footage was released instead. Depictions on film Documentaries Numerous documentary films cover the Apollo program and the Space Race, including: Footprints on the Moon (1969) Moonwalk One (1970) The Greatest Adventure (1978) For All Mankind (1989) Moon Shot (1994 miniseries) "Moon" from the BBC miniseries The Planets (1999) Magnificent Desolation: Walking on the Moon 3D (2005) The Wonder of It All (2007) In the Shadow of the Moon (2007) When We Left Earth: The NASA Missions (2008 miniseries) Moon Machines (2008 miniseries) James May on the Moon (2009) NASA's Story (2009 miniseries) Apollo 11 (2019) Chasing the Moon (2019 miniseries) Docudramas Some missions have been dramatized: Apollo 13 (1995) Apollo 11 (1996) From the Earth to the Moon (1998) The Dish (2000) Space Race (2005) Moonshot (2009) First Man (2018) Fictional The Apollo program has been the focus of several works of fiction, including: Apollo 18 (2011), horror movie which was released to negative reviews. For All Mankind (2019), TV series depicting an alternate history in which the Soviet Union was the first country to successfully land a man on the Moon. Indiana Jones and the Dial of Destiny (2023), fifth movie about Indiana Jones, in which Jürgen Voller, a NASA member and ex-Nazi involved with the Apollo program, wishes to make the world into a better place as he sees fit. See also Apollo 11 in popular culture Apollo Lunar Surface Experiments Package Exploration of the Moon Leslie Cantwell collection List of artificial objects on the Moon List of crewed spacecraft Moon landing conspiracy theories Third-party evidence for Apollo Moon landings Soviet crewed lunar programs Stolen and missing Moon rocks Artemis Program Notes References Citations Sources Chaikin interviewed all the surviving astronauts and others who worked with the program. Further reading NASA Report JSC-09423, April 1975 Astronaut Mike Collins autobiography of his experiences as an astronaut, including his flight aboard Apollo 11. Although this book focuses on Apollo 13, it provides a wealth of background information on Apollo technology and procedures. History of the Apollo program from Apollos 1–11, including many interviews with the Apollo astronauts. Gleick, James, "Moon Fever" [review of Oliver Morton, The Moon: A History of the Future; Apollo's Muse: The Moon in the Age of Photography, an exhibition at the Metropolitan Museum of Art, New York City, July 3 – September 22, 2019; Douglas Brinkley, American Moonshot: John F. Kennedy and the Great Space Race; Brandon R. Brown, The Apollo Chronicles: Engineering America's First Moon Missions; Roger D. Launius, Reaching for the Moon: A Short History of the Space Race; Apollo 11, a documentary film directed by Todd Douglas Miller; and Michael Collins, Carrying the Fire: An Astronaut's Journeys (50th Anniversary Edition)], The New York Review of Books, vol. LXVI, no. 13 (15 August 2019), pp. 54–58. Factual, from the standpoint of a flight controller during the Mercury, Gemini, and Apollo space programs. Details the flight of Apollo 13. Tells Grumman's story of building the lunar modules. History of the crewed space program from 1September 1960, to 5January 1968. Account of Deke Slayton's life as an astronaut and of his work as chief of the astronaut office, including selection of Apollo crews. From origin to November 7, 1962 November 8, 1962 – September 30, 1964 October 1, 1964 – January 20, 1966 January 21, 1966 – July 13, 1974 The history of lunar exploration from a geologist's point of view. External links Apollo program history at NASA's Human Space Flight (HSF) website The Apollo Program at the NASA History Program Office The Apollo Program at the National Air and Space Museum Apollo 35th Anniversary Interactive Feature at NASA (in Flash) Lunar Mission Timeline at the Lunar and Planetary Institute Apollo Collection, The University of Alabama in Huntsville Archives and Special Collections NASA reports Apollo Program Summary Report (PDF), NASA, JSC-09423, April 1975 NASA History Series Publications Project Apollo Drawings and Technical Diagrams at the NASA History Program Office The Apollo Lunar Surface Journal edited by Eric M. Jones and Ken Glover The Apollo Flight Journal by W. David Woods, et al. Multimedia NASA Apollo Program images and videos Apollo Image Archive at Arizona State University Audio recording and transcript of President John F. Kennedy, NASA administrator James Webb, et al., discussing the Apollo agenda (White House Cabinet Room, November 21, 1962) The Project Apollo Archive by Kipp Teague is a large repository of Apollo images, videos, and audio recordings The Project Apollo Archive on Flickr Apollo Image Atlas—almost 25,000 lunar images, Lunar and Planetary Institute 1960s in the United States 1970s in the United States Articles containing video clips Engineering projects Exploration of the Moon Human spaceflight programs NASA programs Space program of the United States	28
An assault is the illegal act of causing physical harm or unwanted physical contact to another person, or, in some legal definitions, the threat or attempt to do so. It is both a crime and a tort and, therefore, may result in criminal prosecution, civil liability, or both. Additionally, assault is a criminal act in which a person intentionally causes fear of physical harm or offensive contact to another person. Assault can be committed with or without a weapon and can range from physical violence to threats of violence. Assault is frequently referred to as an attempt to commit battery, which is the deliberate use of physical force against another person. The deliberate inflicting of fear, apprehension, or terror is another definition of assault that can be found in several legal systems. Depending on the severity of the offense, assault may result in a fine, imprisonment, or even death. Generally, the common law definition is the same in criminal and tort law. Traditionally, common law legal systems have separate definitions for assault and battery. When this distinction is observed, battery refers to the actual bodily contact, whereas assault refers to a credible threat or attempt to cause battery. Some jurisdictions combined the two offenses into a single crime called "assault and battery", which then became widely referred to as "assault". The result is that in many of these jurisdictions, assault has taken on a definition that is more in line with the traditional definition of battery. The legal systems of civil law and Scots law have never distinguished assault from battery. Legal systems generally acknowledge that assaults can vary greatly in severity. In the United States, an assault can be charged as either a misdemeanor or a felony. In England and Wales and Australia, it can be charged as either common assault, assault occasioning actual bodily harm (ABH) or grievous bodily harm (GBH). Canada also has a three-tier system: assault, assault causing bodily harm and aggravated assault. Separate charges typically exist for sexual assaults, affray and assaulting a police officer. Assault may overlap with an attempted crime; for example, an assault may be charged as attempted murder if it was done with intent to kill. Related definitions Battery Battery is a criminal offense that involves the use of physical force against another person without their consent. It is a type of assault and is considered a serious crime. Battery can include a wide range of actions, from slapping someone to causing serious harm or even death. Depending on the severity of the offense, it can carry a wide range of punishments, including jail time, fines, and probation. In jurisdictions that make a distinction between the two, assault usually accompanies battery if the assailant both threatens to make unwanted contact and then carries through with this threat. See common assault. The elements of battery are that it is a volitional act, done for the purpose of causing a harmful or offensive contact with another person or under circumstances that make such contact substantially certain to occur, and which causes such contact. Aggravated assault Aggravated assault is a violent crime that involves violence or the threat of violence. It is generally described as an intentional act that causes another person to fear imminent physical harm or injury. This can include the use of a weapon, or the threat of using a weapon. It is usually considered a felony offense and can carry severe penalties. Aggravated assault is often considered a very serious crime and can lead to long-term prison sentences. Aggravated assault is, in some jurisdictions, a stronger form of assault, usually using a deadly weapon. A person has committed an aggravated assault when that person attempts to: cause serious bodily injury to another person with a deadly weapon have sexual relations with a person who is under the age of consent cause bodily harm by recklessly operating a motor vehicle during road rage; often referred to as either vehicular assault or aggravated assault with a motor vehicle. Aggravated assault can also be charged in cases of attempted harm against police officers or other public servants. Defenses Although the range and precise application of defenses varies between jurisdictions, the following represents a list of the defenses that may apply to all levels of assault: Consent Exceptions exist to cover unsolicited physical contact which amount to normal social behavior known as de minimis harm. Assault can also be considered in cases involving the spitting on, or unwanted exposure of bodily fluids to others. Consent may be a complete or partial defense to assault. In some jurisdictions, most notably England, it is not a defense where the degree of injury is severe, as long as there is no legally recognized good reason for the assault. This can have important consequences when dealing with issues such as consensual sadomasochistic sexual activity, the most notable case being the Operation Spanner case. Legally recognized good reasons for consent include surgery, activities within the rules of a game (mixed martial arts, wrestling, boxing, or contact sports), bodily adornment (R v Wilson [1996] Crim LR 573), or horseplay (R v Jones [1987] Crim LR 123). However, any activity outside the rules of the game is not legally recognized as a defense of consent. In Scottish law, consent is not a defense for assault. Arrest and other official acts Police officers and court officials have a general power to use force for the purpose of performing an arrest or generally carrying out their official duties. Thus, a court officer taking possession of goods under a court order may use force if reasonably necessary. Punishment In some jurisdictions such as Singapore, judicial corporal punishment is part of the legal system. The officers who administer the punishment have immunity from prosecution for assault. In the United States, England, Northern Ireland, Australia and Canada, corporal punishment administered to children by their parent or legal guardian is not legally considered to be assault unless it is deemed to be excessive or unreasonable. What constitutes "reasonable" varies in both statutory law and case law. Unreasonable physical punishment may be charged as assault or under a separate statute for child abuse. In English law, s. 58 Children Act 2004 limits the availability of the lawful correction defense to common assault. This defence was abolished in Wales in 2022. Many countries, including some US states, also permit the use of corporal punishment for children in school. Prevention of crime This may or may not involve self-defense in that, using a reasonable degree of force to prevent another from committing a crime could involve preventing an assault, but it could be preventing a crime not involving the use of personal violence. Defense of property Some jurisdictions allow force to be used in defense of property, to prevent damage either in its own right, or under one or both of the preceding classes of defense in that a threat or attempt to damage property might be considered a crime (in English law, under s5 Criminal Damage Act 1971 it may be argued that the defendant has a lawful excuse to damage property during the defense and a defense under s3 Criminal Law Act 1967) subject to the need to deter vigilantes and excessive self-help. Furthermore, some jurisdictions, such as Ohio, allow residents in their homes to use force when ejecting an intruder. The resident merely needs to assert to the court that they felt threatened by the intruder's presence. Regional details The following are the countries with the most cases of assault according to the United Nations in 2018. Australia The term 'assault', when used in legislation, commonly refers to both common assault and battery, even though the two offences remain distinct. Common assault involves intentionally or recklessly causing a person to apprehend the imminent infliction of unlawful force, whilst battery refers to the actual infliction of force. Each state has legislation relating to the act of assault, and offences against the act that constitute assault are heard in the magistrates' court of that state or indictable offences are heard in a district or supreme court of that state. The legislation that defines assault of each state outline what the elements are that make up the assault, where the assault is sectioned in legislation or criminal codes, and the penalties that apply for the offence of assault. In New South Wales, the Crimes Act 1900 defines a range of assault offences deemed more serious than common assault and which attract heavier penalties. These include: Assault with further specific intent Acts done to the person with intent to murder Wounding or grievous bodily harm Use or possession of a weapon to resist arrest Assault causing certain injuries Actual bodily harm – the term is not defined in the Crimes Act, but case law indicates actual bodily harm may include injuries such as bruises and scratches, as well as psychological injuries if the injury inflicted is more than merely transient (the injury does not necessarily need to be permanent) Wounding – where there is breaking of the skin; Grievous bodily harm – which includes the destruction of a foetus, permanent or serious disfiguring, and transmission of a grievous bodily disease Assault causing death Death Death when intoxicated (in regards to the offender) Canada Assault is an offence under s. 265 of the Canadian Criminal Code. There is a wide range of the types of assault that can occur. Generally, an assault occurs when a person directly or indirectly applies force intentionally to another person without their consent. It can also occur when a person attempts to apply such force, or threatens to do so, without the consent of the other person. An injury need not occur for an assault to be committed, but the force used in the assault must be offensive in nature with an intention to apply force. It can be an assault to "tap", "pinch", "push", or direct another such minor action toward another, but an accidental application of force is not an assault. The potential punishment for an assault in Canada varies depending on the manner in which the charge proceeds through the court system and the type of assault that is committed. The Criminal Code defines assault as a dual offence (indictable or summary offence). Police officers can arrest someone without a warrant for an assault if it is in the public's interest to do so notwithstanding S.495(2)(d) of the Code. This public interest is usually satisfied by preventing a continuation or repetition of the offence on the same victim. Some variations on the ordinary crime of assault include: Assault: The offence is defined by section 265 of the Code. Assault with a weapon: Section 267(a) of the Code. Assault causing bodily harm: See assault causing bodily harm Section 267(b) of the Code. Aggravated assault: Section 268 of the Code. Assaulting a peace officer, etc.: Section 270 of the Code. Sexual assault: Section 271 of the Code. Sexual assault with a weapon or threats or causing bodily harm: Section 272 of the Code. Aggravated sexual assault: See aggravated sexual assault. An individual cannot consent to an assault with a weapon, assault causing bodily harm, aggravated assault, or any sexual assault. Consent will also be vitiated if two people consent to fight but serious bodily harm is intended and caused (R v Paice; R v Jobidon). A person cannot consent to serious bodily harm. Ancient Greece Assault in Ancient Greece was normally termed hubris. Contrary to modern usage, the term did not have the extended connotation of overweening pride, self-confidence or arrogance, often resulting in fatal retribution. In Ancient Greece, "hubris" referred to actions which, intentionally or not, shamed and humiliated the victim, and frequently the perpetrator as well. It was most evident in the public and private actions of the powerful and rich. Violations of the law against hubris included, what would today be termed, assault and battery; sexual crimes ranging from forcible rape of women or children to consensual but improper activities; or the theft of public or sacred property. Two well-known cases are found in the speeches of Demosthenes, a prominent statesman and orator in ancient Greece. These two examples occurred when first, in addition to other acts of violence, Meidias allegedly punched Demosthenes in the face in the theater (Against Meidias), and second (Against Konon), when the defendant allegedly severely beat him. Hubris, though not specifically defined, was a legal term and was considered a crime in classical Athens. It was also considered the greatest sin of the ancient Greek world. That was so because it not only was proof of excessive pride, but also resulted in violent acts by or to those involved. The category of acts constituting hubris for the ancient Greeks apparently broadened from the original specific reference to mutilation of a corpse, or a humiliation of a defeated foe, or irreverent, "outrageous treatment", in general. The meaning was eventually further generalized in its modern English usage to apply to any outrageous act or exhibition of pride or disregard for basic moral laws. Such an act may be referred to as an "act of hubris", or the person committing the act may be said to be hubristic. Atë, Greek for 'ruin, folly, delusion', is the action performed by the hero, usually because of their hubris, or great pride, that leads to their death or downfall. Crucial to this definition are the ancient Greek concepts of honor (timē) and shame. The concept of timē included not only the exaltation of the one receiving honor, but also the shaming of the one overcome by the act of hubris. This concept of honor is akin to a zero-sum game. Rush Rehm simplifies this definition to the contemporary concept of "insolence, contempt, and excessive violence". India The Indian Penal Code covers the punishments and types of assault in Chapter 16, sections 351 through 358. The Code further explains that "mere words do not amount to an assault. But the words which a person uses may give to their gestures or preparation such a meaning as may make those gestures or preparations amount to an assault". Assault is in Indian criminal law an attempt to use criminal force (with criminal force being described in s.350). The attempt itself has been made an offence in India, as in other states. Nigeria The Criminal Code Act (chapter 29 of Part V; sections 351 to 365) creates a number of offences of assault. Assault is defined by section 252 of that Act. Assault is a misdemeanor punishable by one year imprisonment; assault with "intent to have carnal knowledge of him or her" or who indecently assaults another, or who commits other more-serious variants of assault (as defined in the Act) are guilty of a felony, and longer prison terms are provided for. Pacific Islands Marshall Islands The offence of assault is created by section 113 of the Criminal Code. A person is guilty of this offence if they unlawfully offer or attempt, with force or violence, to strike, beat, wound, or do bodily harm to, another. Republic of Ireland Section 2 of the Non-Fatal Offences against the Person Act 1997 creates the offence of assault, and section 3 of that Act creates the offence of assault causing harm. South Africa South African law does not draw the distinction between assault and battery. Assault is a common law crime defined as "unlawfully and intentionally applying force to the person of another, or inspiring a belief in that other that force is immediately to be applied to him". The law also recognises the crime of assault with intent to cause grievous bodily harm, where grievous bodily harm is defined as "harm which in itself is such as seriously to interfere with health". The common law crime of indecent assault was repealed by the Criminal Law (Sexual Offences and Related Matters) Amendment Act, 2007, and replaced by a statutory crime of sexual assault. United Kingdom Piracy with violence Section 2 of the Piracy Act 1837 provides that it is an offence, amongst other things, for a person, with intent to commit or at the time of or immediately before or immediately after committing the crime of piracy in respect of any ship or vessel, to assault, with intent to murder, any person being on board of or belonging to such ship or vessel. Assault on an officer of Revenue and Customs This offence (relating to officers of HMRC) is created by section 32(1) of the Commissioners for Revenue and Customs Act 2005. Assaulting an immigration officer This offence is created by section 22(1) of the UK Borders Act 2007. Assaulting an accredited financial investigator This section is created by section 453A of the Proceeds of Crime Act 2002. Assaulting a member of an international joint investigation team This offence is created by section 57(2) of the Serious Organised Crime and Police Act 2005. Attacks on internationally protected persons Section 1(1)(a) of the Internationally Protected Persons Act 1978 (c.17) makes provision for assault occasioning actual bodily harm or causing injury on "protected persons" (including Heads of State). Attacks on UN Staff workers Section 1(2)(a) of the United Nations Personnel Act 1997 (c.13) makes provision for assault causing injury, and section 1(2)(b) makes provision for assault occasioning actual bodily harm, on UN staff. Assault by person committing an offence under the Night Poaching Act 1828 This offence is created by section 2 of the Night Poaching Act 1828. Abolished offences: Assault on customs and excise officers, etc. Section 16(1)(a) of the Customs and Excise Management Act 1979 (c.2) provided that it was an offence to, amongst other things, assault any person duly engaged in the performance of any duty or the exercise of any power imposed or conferred on him by or under any enactment relating to an assigned matter, or any person acting in his aid. For the meaning of "assault" in this provision, see Logdon v. DPP [1976] Crim LR 121, DC. This offence was abolished and replaced by the Commissioners for Revenue and Customs Act 2005. Assaulting a person designated under section 43 of the Serious Organised Crime and Police Act 2005 This offence was created by section 51(1) of the Serious Organised Crime and Police Act 2005. It related to officers of the Serious Organized Crime Agency and was repealed when that agency was abolished. England and Wales English law provides for two offences of assault: common assault and battery. Assault (or common assault) is committed if one intentionally or recklessly causes another person to apprehend immediate and unlawful personal violence. Violence in this context means any unlawful touching, though there is some debate over whether the touching must also be hostile. The terms "assault" and "common assault" often encompass the separate offence of battery, even in statutory settings such as s 40(3)(a) of the Criminal Justice Act 1988. A common assault is an assault that lacks any of the aggravating features which Parliament has deemed serious enough to deserve a higher penalty. Section 39 of the Criminal Justice Act 1988 provides that common assault, like battery, is triable only in the magistrates' court in England and Wales (unless it is linked to a more serious offence, which is triable in the Crown Court). Additionally, if a defendant has been charged on an indictment with assault occasioning actual bodily harm (ABH), or racially/religiously aggravated assault, then a jury in the Crown Court may acquit the defendant of the more serious offence, but still convict of common assault if it finds common assault has been committed. Aggravated assault An assault which is aggravated by the scale of the injuries inflicted may be charged as offences causing "actual bodily harm" (ABH) or, in the severest cases, "grievous bodily harm" (GBH). Assault occasioning actual bodily harm This offence is created by section 47 of the Offences against the Person Act 1861. Inflicting grievous bodily harm Also referred to as "malicious wounding" or "unlawful wounding". This offence is created by section 20 of the Offences against the Person Act 1861. Causing grievous bodily harm with intent Also referred to as "wounding with intent". This offence is created by section 18 of the Offences against the Person Act 1861. Other aggravated assault charges refer to assaults carried out against a specific target or with a specific intent: Assault with intent to rob The penalty for assault with intent to rob, a common law offence, is provided by section 8(2) of the Theft Act 1968. Racially or religiously aggravated common assault This offence is created by section 29(1)(c) of the Crime and Disorder Act 1998, defined in terms of the common law offence. Racially or religiously aggravated assault occasioning actual bodily harm This offence is created by section 29(1)(b) of the Crime and Disorder Act 1998, defined in terms of the common law offence. Assault with intent to resist arrest This offence is created by section 38 of the Offences against the Person Act 1861. Assaulting a constable in the execution of his duty Section 89(1) of the Police Act 1996 provides that it is an offence for a person to assault a constable acting in the execution of his duty or a person assisting a constable in the execution of his duty. It is a summary offence with the same maximum penalty as common assault. Assaulting a traffic officer This offence is created by section/10 section 10(1) of the Traffic Management Act 2004. Assaulting a person designated or accredited under sections 38 or 39 or 41 or 41A of the Police Reform Act 2002 This offence is created by section/46 section 46(1) of the Police Reform Act 2002. Those sections relate respectively to persons given police powers by a chief police officer, detention contractors retained by police, accredited contractors under a community safety accreditation scheme, and weights and measures inspectors. Assault on a prison custody officer This offence is created by section 90(1) of the Criminal Justice Act 1991 (c.53). Assault on a secure training centre custody officer This offence is created by section 13(1) of the Criminal Justice and Public Order Act 1994 (c.33). Assault on officer saving wreck This offence is created by section 37 of the Offences against the Person Act 1861. Assaulting an officer of the court This offence is created by section 14(1)(b) of the County Courts Act 1984. Cruelty to persons under sixteen This offence is created by section 1(1) of the Children and Young Persons Act 1933 and applies to a person who has responsibility for the child. In England (but not Wales since 2022), common law provides a defence of "reasonable punishment" to battery (i.e. assaults involving touching); the Children Act 2004 limits the defence to exclude, among other offences, cruelty under the 1933 Act, but not battery, which implies that smacking is not always to be considered cruelty. Sexual assault The offence of sexual assault is created by section 3 of the Sexual Offences Act 2003. It is not defined in terms of the offences of common assault or battery. It instead requires intentional touching and the absence of a reasonable belief in consent. Assault by penetration This offence is defined by section 2 of the Sexual Offences Act 2003. Whereas rape consists only of penetration with the perpetrator's penis, assault by penetration can be committed with anything, though unlike rape it excludes penetration of the mouth. It carries the same maximum sentence of life imprisonment. Assault on an emergency worker The Assaults on Emergency Workers (Offences) Act 2018 makes common assault an either way offence (section 1) when committed against an emergency worker (defined in section 3), with a maximum sentence of two years' imprisonment if tried on indictment. The Act did not repeal any enactments, so the existing offence of assault on a constable is still available, but that offence cannot be tried on indictment and is therefore limited to six months. Scotland In Scots law, assault is defined as an "attack upon the person of another". There is no distinction made in Scotland between assault and battery (which is not a term used in Scots law), although, as in England and Wales, assault can be occasioned without a physical attack on another's person, as demonstrated in Atkinson v. HM Advocate wherein the accused was found guilty of assaulting a shop assistant by simply jumping over a counter wearing a ski mask. The court said: Scots law also provides for a more serious charge of aggravated assault on the basis of such factors as severity of injury, the use of a weapon, or Hamesucken (to assault a person in their own home). The mens rea for assault is simply "evil intent", although this has been held to mean no more than that assault "cannot be committed accidentally or recklessly or negligently" as upheld in Lord Advocate's Reference No 2 of 1992 where it was found that a "hold-up" in a shop justified as a joke would still constitute an offence. It is a separate offence to assault on a constable in the execution of their duty, under Section 90, Police and Fire Reform (Scotland) Act 2012 (previously Section 41 of the Police (Scotland) Act 1967) which provides that it is an offence for a person to, amongst other things, assault a constable in the execution of their duty or a person assisting a constable in the execution of their duty. Northern Ireland Several offences of assault exist in Northern Ireland. The Offences against the Person Act 1861 creates the offences of: Common assault and battery: a summary offence, under section 42; Aggravated assault and battery: a summary offence, under section 43 Common assault: under section 47 Assault occasioning actual bodily harm: under section 47 The Criminal Justice (Miscellaneous Provisions) Act (Northern Ireland) 1968 creates the offences of: Assault with intent to resist arrest: under section 7(1)(b); this offence was formerly created by s.38 of the OAPA 1861. That Act formerly created the offence of 'Assault on a constable in the execution of his duty'. under section 7(1)(a), but that section has been superseded by section 66(1) of the Police (Northern Ireland) Act 1998 (c.32) which now provides that it is an offence for a person to, amongst other things, assault a constable in the execution of his duty, or a person assisting a constable in the execution of his duty. United States In the United States, assault may be defined as an attempt to commit a battery. However, the crime of assault can encompass acts in which no battery is intended, but the defendant's act nonetheless creates reasonable fear in others that a battery will occur. Four elements were required at common law: The apparent, present ability to carry out; An unlawful attempt; To commit a violent injury; Upon another. As the criminal law evolved, element one was weakened in most jurisdictions so that a reasonable fear of bodily injury would suffice. These four elements were eventually codified in most states. The crime of assault generally requires that both the perpetrator and the victim of an assault be a natural person. Thus, unless the attack is directed by a person, an animal attack does not constitute an assault. However, under limited circumstances the Unborn Victims of Violence Act of 2004 treats a fetus as a separate person for the purposes of assault and other violent crimes. Possible examples of defenses, mitigating circumstances, or failures of proof that may be raised in response to an assault charge include: Lack of intent: A defendant could argue that since they were drunk, they could not form the specific intent to commit assault. This defense would most likely fail, however, since only involuntary intoxication is accepted as a defense in most American jurisdictions. Mutual consent: A defendant could also argue that they were engaged in mutually consensual behavior. For example, boxers who are fighting in an organized boxing match and do not significantly deviate from the rules of the sport cannot be charged with assault. State laws Laws on assault vary by state. Since each state has its own criminal laws, there is no universal assault law. Acts classified as assault in one state may be classified as battery, menacing, intimidation, reckless endangerment, etc. in another state. Assault is often subdivided into two categories, simple assault and aggravated assault. Simple assault involves an intentional act that causes another person to be in reasonable fear of an imminent battery. Simple assault may also involve an attempt to cause harm to another person, where that attempt does not succeed. Simple assault is typically classified as a misdemeanor offense, unless the victim is a member of a protected class, such as being a law enforcement officer. Even as a misdemeanor, an assault conviction may still result in incarceration and in a criminal record. Aggravated assault involves more serious actions, such as an assault that is committed with the intent to cause a serious bodily injury, or an assault that is committed with a deadly weapon such as a firearm. Aggravated assault is typically classified as a felony offense. Modern American statutes may define assault as including: an attempt to cause or purposely, knowingly, or recklessly causing bodily injury to another negligently causing bodily injury to another with a dangerous weapon (assault with a deadly weapon). causing bodily harm by reckless operation of a motor vehicle (vehicular assault). threatening another in a menacing manner. knowingly causing physical contact with another person knowing the other person will regard the contact as offensive or provocative causing stupor, unconsciousness or physical injury by intentionally administering a drug or controlled substance without consent purposely or knowingly causing reasonable apprehension of bodily injury in another any act which is intended to place another in fear of immediate physical contact which will be painful, injurious, insulting, or offensive, coupled with the apparent ability to execute the act. In some states, consent is a complete defense to assault. In other jurisdictions, mutual consent is an incomplete defense to an assault charge such that an assault charge is prosecuted as a less significant offense such as a petty misdemeanor. States vary on whether it is possible to commit an "attempted assault" since it can be considered a double inchoate offense. Kansas In Kansas the law on assault states: New York In New York State, assault (as defined in the New York State Penal Code Article 120) requires an actual injury. Other states define this as battery; there is no crime of battery in New York. However, in New York if a person threatens another person with imminent injury without engaging in physical contact, that is called "menacing". A person who engages in that behavior is guilty of aggravated harassment in the second degree (a Class A misdemeanor; punishable with up to one year incarceration, probation for an extended time, and a permanent criminal record) when they threaten to cause physical harm to another person, and guilty of aggravated harassment in the first degree (a Class E felony) if they have a previous conviction for the same offense. New York also has specific laws against hazing, when such threats are made as requirement to join an organization. North Dakota North Dakota law states: Pennsylvania In Pennsylvania, an offender can be charged with simple assault if they: injure someone else recklessly, knowingly, or purposefully accidentally injure someone with a firearm or weapon cause a needle-stick to an officer or correctional employee during a search or arrest threaten or intimidate someone causing fear of imminent serious bodily injury A person convicted of simple assault can be ordered to up to two years in prison as a second-degree misdemeanor. An offender can be charged with aggravated assault if the offender: demonstrates extreme indifference to the victim's life injures or threatens to injure a law enforcement officer, correctional officer, firefighter, police officer, or teacher on duty, or for incapacitating any of these individuals A person convicted of aggravated assault can face up to 10 years in prison as a second-degree felony. However, if the crime is perpetrated against a firefighter or police officer, the offender may face first-degree felony charges carrying a penalty of up to 20 years in prison. Tennessee In Tennessee assault is defined as follows: See also Domestic violence Gay bashing Hate crime Mayhem Offences Against the Person Act 1861 Citations General and cited references External links A guide to the non fatal offences against the person Crimes	7
Events Pre-1600 310 – Pope Eusebius dies, possibly from a hunger strike, shortly after being banished by the Emperor Maxentius to Sicily. 682 – Pope Leo II begins his pontificate. 986 – Byzantine–Bulgarian wars: Battle of the Gates of Trajan: The Bulgarians under the Comitopuli Samuel and Aron defeat the Byzantine forces at the Gate of Trajan, with Byzantine Emperor Basil II barely escaping. 1186 – Georgenberg Pact: Ottokar IV, Duke of Styria and Leopold V, Duke of Austria sign a heritage agreement in which Ottokar gives his duchy to Leopold and to his son Frederick under the stipulation that Austria and Styria would henceforth remain undivided. 1386 – Karl Topia, the ruler of Princedom of Albania forges an alliance with the Republic of Venice, committing to participate in all wars of the Republic and receiving coastal protection against the Ottomans in return. 1424 – Hundred Years' War: Battle of Verneuil: An English force under John, Duke of Bedford defeats a larger French army under Jean II, Duke of Alençon, John Stewart, and Earl Archibald of Douglas. 1488 – Konrad Bitz, the Bishop of Turku, marks the date of his preface to Missale Aboense, the oldest known book of Finland. 1498 – Cesare Borgia, son of Pope Alexander VI, becomes the first person in history to resign the cardinalate; later that same day, King Louis XII of France names him Duke of Valentinois. 1549 – Battle of Sampford Courtenay: The Prayer Book Rebellion is quashed in England. 1560 – The Catholic Church is overthrown and Protestantism is established as the national religion in Scotland. 1585 – Eighty Years' War: Siege of Antwerp: Antwerp is captured by Spanish forces under Alexander Farnese, Duke of Parma, who orders Protestants to leave the city and as a result over half of the 100,000 inhabitants flee to the northern provinces. 1585 – A first group of colonists sent by Sir Walter Raleigh under the charge of Ralph Lane lands in the New World to create Roanoke Colony on Roanoke Island, off the coast of present-day North Carolina. 1597 – Islands Voyage: Robert Devereux, 2nd Earl of Essex, and Sir Walter Raleigh set sail on an expedition to the Azores. 1601–1900 1668 – The magnitude 8.0 North Anatolia earthquake causes 8,000 deaths in northern Anatolia, Ottoman Empire. 1717 – Austro-Turkish War of 1716–18: The month-long Siege of Belgrade ends with Prince Eugene of Savoy's Austrian troops capturing the city from the Ottoman Empire. 1723 – Ioan Giurgiu Patachi becomes Bishop of Făgăraș and is festively installed in his position at the St. Nicolas Cathedral in Făgăraș, after being formally confirmed earlier by Pope Clement XI. 1740 – Pope Benedict XIV, previously known as Prospero Lambertini, succeeds Clement XII as the 247th Pope. 1784 – Classical composer Luigi Boccherini receives a pay rise of 12,000 reals from his employer, the Infante Luis, Count of Chinchón. 1798 – The Vietnamese Catholics report a Marian apparition in Quảng Trị, an event which is called Our Lady of La Vang. 1807 – Robert Fulton's North River Steamboat leaves New York City for Albany, New York, on the Hudson River, inaugurating the first commercial steamboat service in the world. 1808 – The Finnish War: The Battle of Alavus is fought. 1827 – Dutch King William I and Pope Leo XII sign concord. 1836 – British parliament accepts registration of births, marriages and deaths. 1862 – American Indian Wars: The Dakota War of 1862 begins in Minnesota as Dakota warriors attack white settlements along the Minnesota River. 1862 – American Civil War: Major General J. E. B. Stuart is assigned command of all the cavalry of the Confederate Army of Northern Virginia. 1863 – American Civil War: In Charleston, South Carolina, Union batteries and ships bombard Confederate-held Fort Sumter. 1864 – American Civil War: Battle of Gainesville: Confederate forces defeat Union troops near Gainesville, Florida. 1866 – The Grand Duchy of Baden announces its withdrawal from the German Confederation and signs a treaty of peace and alliance with Prussia. 1876 – Richard Wagner's Götterdämmerung, the last opera in his Ring cycle, premieres at the Bayreuth Festspielhaus. 1883 – The first public performance of the Dominican Republic's national anthem, Himno Nacional. 1896 – Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom. 1901–present 1914 – World War I: Battle of Stallupönen: The German army of General Hermann von François defeats the Russian force commanded by Paul von Rennenkampf near modern-day Nesterov, Russia. 1915 – Jewish American Leo Frank is lynched in Marietta, Georgia, USA after his death sentence is commuted by Governor John Slaton. 1915 – A Category 4 hurricane hits Galveston, Texas with winds at . 1916 – World War I: Romania signs a secret treaty with the Entente Powers. According to the treaty, Romania agreed to join the war on the Allied side. 1918 – Bolshevik revolutionary leader Moisei Uritsky is assassinated. 1942 – World War II: U.S. Marines raid the Japanese-held Pacific island of Makin. 1943 – World War II: The U.S. Eighth Air Force suffers the loss of 60 bombers on the Schweinfurt–Regensburg mission. 1943 – World War II: The U.S. Seventh Army under General George S. Patton arrives in Messina, Italy, followed several hours later by the British 8th Army under Field Marshal Bernard Montgomery, thus completing the Allied conquest of Sicily. 1943 – World War II: First Québec Conference of Winston Churchill, Franklin D. Roosevelt, and William Lyon Mackenzie King begins. 1943 – World War II: The Royal Air Force begins Operation Hydra, the first air raid of the Operation Crossbow strategic bombing campaign against Germany's V-weapon program. 1945 – Sukarno and Mohammad Hatta proclaim the independence of Indonesia, igniting the Indonesian National Revolution against the Dutch Empire. 1945 – The novella Animal Farm by George Orwell is first published. 1945 – Evacuation of Manchukuo: At Talitzou by the Sino-Korean border, Puyi, then the Kangde Emperor of Manchukuo, formally renounces the imperial throne, dissolves the state, and cedes its territory to the Republic of China. 1947 – The Radcliffe Line, the border between the Dominions of India and Pakistan, is revealed. 1949 – The 6.7 Karlıova earthquake shakes eastern Turkey with a maximum Mercalli intensity of X (Extreme), leaving 320–450 dead. 1949 – Matsukawa derailment: Unknown saboteurs cause a passenger train to derail and overturn in Fukushima Prefecture, Japan, killing three crew members and igniting a political firestorm between the Japanese Communist Party and the government of Occupied Japan that will eventually lead to the Japanese Red Purge. 1953 – First meeting of Narcotics Anonymous takes place, in Southern California. 1955 – Hurricane Diane made landfall near Wilmington, North Carolina, and it went on to cause major floods and kill more than 184 people. 1958 – Pioneer 0, America's first attempt at lunar orbit, is launched using the first Thor-Able rocket and fails. Notable as one of the first attempted launches beyond Earth orbit by any country. 1959 – Quake Lake is formed by the magnitude 7.2 1959 Hebgen Lake earthquake near Hebgen Lake in Montana. 1960 – Aeroflot Flight 036 crashes in Soviet Ukraine, killing 34. 1962 – Peter Fechter is shot and bleeds to death while trying to cross the new Berlin Wall. 1969 – Category 5 Hurricane Camille hits the U.S. Gulf Coast, killing 256 and causing $1.42 billion in damage. 1970 – Soviet Union Venera program: Venera 7 launched. It will become the first spacecraft to successfully transmit data from the surface of another planet (Venus). 1976 – A magnitude 7.9 earthquake hits off the coast of Mindanao, Philippines, triggering a destructive tsunami, killing between 5,000-8,000 people and leaving more than 90,000 homeless. 1977 – The Soviet icebreaker Arktika becomes the first surface ship to reach the North Pole. 1978 – Double Eagle II becomes first balloon to cross the Atlantic Ocean when it lands in Miserey, France near Paris, 137 hours after leaving Presque Isle, Maine. 1985 – The 1985–86 Hormel strike begins in Austin, Minnesota. 1988 – President of Pakistan Muhammad Zia-ul-Haq and U.S. Ambassador Arnold Raphel are killed in a plane crash. 1991 – Strathfield massacre: In Sydney, New South Wales, Australia, taxi driver Wade Frankum shoots seven people and injures six others before turning the gun on himself. 1998 – Lewinsky scandal: US President Bill Clinton admits in taped testimony that he had an "improper physical relationship" with White House intern Monica Lewinsky; later that same day he admits before the nation that he "misled people" about the relationship. 1999 – The 7.6 İzmit earthquake shakes northwestern Turkey with a maximum Mercalli intensity of IX (Violent), leaving 17,118–17,127 dead and 43,953–50,000 injured. 2004 – The National Assembly of Serbia unanimously adopts new state symbols for Serbia: Bože pravde becomes the new anthem and the coat of arms is adopted for the whole country. 2005 – The first forced evacuation of settlers, as part of Israeli disengagement from Gaza, starts. 2005 – Over 500 bombs are set off by terrorists at 300 locations in 63 out of the 64 districts of Bangladesh. 2008 – American swimmer Michael Phelps becomes the first person to win eight gold medals at one Olympic Games. 2009 – An accident at the Sayano-Shushenskaya Dam in Khakassia, Russia, kills 75 and shuts down the hydroelectric power station, leading to widespread power failure in the local area. 2015 – A bomb explodes near the Erawan Shrine in Bangkok, Thailand, killing at least 19 people and injuring 123 others. 2017 – Barcelona attacks: A van is driven into pedestrians in La Rambla, killing 14 and injuring at least 100. 2019 – A bomb explodes at a wedding in Kabul killing 63 people and leaving 182 injured. Births Pre-1600 1153 – William IX, Count of Poitiers (d. 1156) 1465 – Philibert I, Duke of Savoy (d. 1482) 1473 – Richard of Shrewsbury, Duke of York (d. 1483) 1501 – Philipp II, Count of Hanau-Münzenberg (d. 1529) 1556 – Alexander Briant, English martyr and saint (d. 1581) 1578 – Francesco Albani, Italian painter (d. 1660) 1578 – Johann, Prince of Hohenzollern-Sigmaringen, first prince of Hohenzollern-Sigmaringen (d. 1638) 1582 – John Matthew Rispoli, Maltese philosopher (d. 1639) 1586 – Johann Valentin Andrea, German theologian (d. 1654) 1601–1900 1603 – Lennart Torstensson, Swedish Field Marshal, Privy Councillour and Governor-General (d. 1651) 1629 – John III Sobieski, Polish–Lithuanian king (d. 1696) 1686 – Nicola Porpora, Italian composer and educator (d. 1768) 1753 – Josef Dobrovský, Bohemian philologist and historian (d. 1828) 1768 – Louis Desaix, French general (d. 1800) 1786 – Davy Crockett, American soldier and politician (d. 1836) 1786 – Princess Victoria of Saxe-Coburg-Saalfeld (d. 1861) 1801 – Fredrika Bremer, Swedish writer and feminist (d. 1865) 1828 – Jules Bernard Luys, French neurologist and physician (d. 1897) 1840 – Wilfrid Scawen Blunt, English poet and activist (d. 1922) 1845 – Henry Cadwalader Chapman, American physician and naturalist (d. 1909) 1849 – William Kidston, Scottish-Australian politician, 17th Premier of Queensland (d. 1919) 1863 – Gene Stratton-Porter, American author and photographer (d. 1924) 1865 – Julia Marlowe, English-American actress (d. 1950) 1866 – Mahbub Ali Khan, Asaf Jah VI, Indian 6th Nizam of Hyderabad (d. 1911) 1873 – John A. Sampson, American gynecologist and academic (d. 1946) 1877 – Ralph McKittrick, American golfer and tennis player (d. 1923) 1878 – Reggie Duff, Australian cricketer (d. 1911) 1880 – Percy Sherwell, South African cricketer and tennis player (d. 1948) 1887 – Charles I of Austria (d. 1922) 1887 – Marcus Garvey, Jamaican journalist and activist, founded Black Star Line (d. 1940) 1888 – Monty Woolley, American actor, raconteur, and pundit (d. 1963) 1890 – Stefan Bastyr, Polish soldier and pilot (d. 1920) 1890 – Harry Hopkins, American politician and diplomat, 8th United States Secretary of Commerce (d. 1946) 1893 – John Brahm, German-American director and production manager (d. 1982) 1893 – Mae West, American stage and film actress (d. 1980) 1894 – William Rootes, 1st Baron Rootes, English businessman, founded Rootes Group (d. 1964) 1896 – Leslie Groves, American general and engineer (d. 1970) 1896 – Tõnis Kint, Estonian lieutenant and politician, Prime Minister of Estonia in exile (d. 1991) 1896 – Oliver Waterman Larkin, American historian and author (d. 1970) 1899 – Janet Lewis, American poet and novelist (d. 1998) 1900 – Vivienne de Watteville, British travel writer and adventurer (d. 1957) 1900 – Pauline A. Young, American teacher, historian, aviator and activist (d. 1991) 1901–present 1904 – Mary Cain, American journalist and politician (d. 1984) 1904 – Leopold Nowak, Austrian composer and musicologist (d. 1991) 1909 – Larry Clinton, American trumpet player and bandleader (d. 1985) 1909 – Wilf Copping, English footballer (d. 1980) 1911 – Mikhail Botvinnik, Russian chess player and engineer (d. 1995) 1911 – Martin Sandberger, German colonel and lawyer (d. 2010) 1913 – Mark Felt (aka 'Deep Throat'), American lawyer and agent, 2nd Deputy Director of the Federal Bureau of Investigation (d. 2008) 1913 – Oscar Alfredo Gálvez, Argentinian race car driver (d. 1989) 1913 – Rudy York, American baseball player and manager (d. 1970) 1914 – Bill Downs, American journalist (d. 1978) 1914 – Franklin Delano Roosevelt Jr., American lawyer and politician (d. 1988) 1916 – Moses Majekodunmi, Nigerian physician and politician (d. 2012) 1918 – Evelyn Ankers, British-American actress (d. 1985) 1918 – Ike Quebec, American saxophonist and pianist (d. 1963) 1918 – Michael John Wise, English geographer and academic (d. 2015) 1919 – Georgia Gibbs, American singer (d. 2006) 1920 – Maureen O'Hara, Irish-American actress and singer (d. 2015) 1920 – Lida Moser, American photographer and author (d. 2014) 1921 – Geoffrey Elton, German-English historian and academic (d. 1994) 1922 – Roy Tattersall, English cricketer (d. 2011) 1923 – Carlos Cruz-Diez, Venezuelan artist (d. 2019) 1923 – Larry Rivers, American painter and sculptor (d. 2002) 1924 – Evan S. Connell, American novelist, poet, and short story writer (d. 2013) 1926 – Valerie Eliot, English businesswoman (d. 2012) 1926 – Jiang Zemin, Chinese engineer and politician, former General Secretary of the Chinese Communist Party (paramount leader) and 5th President of China (d. 2022) 1927 – Sam Butera, American saxophonist and bandleader (d. 2009) 1927 – F. Ray Keyser Jr., American lawyer and politician, 72nd Governor of Vermont (d. 2015) 1928 – T. J. Anderson, American composer, conductor, and educator 1928 – Willem Duys, Dutch tennis player, sportscaster, and producer (d. 2011) 1929 – Francis Gary Powers, American captain and pilot (d. 1977) 1930 – Harve Bennett, American screenwriter and producer (d. 2015) 1930 – Ted Hughes, English poet and playwright (d. 1998) 1931 – Tony Wrigley, English historian, demographer, and academic (d. 2022) 1932 – V. S. 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Independence Day, celebrates the independence of Gabon from France in 1960. Marcus Garvey Day (Jamaica) Prekmurje Union Day (Slovenia) San Martin Day (Argentina) Black Cat Appreciation Day (United States) References External links Days of the year August	5
Alfred Russel Wallace (8 January 1823 – 7 November 1913) was an English naturalist, explorer, geographer, anthropologist, biologist and illustrator. He independently conceived the theory of evolution through natural selection; his 1858 paper on the subject was published that year alongside extracts from Charles Darwin's earlier writings on the topic. It spurred Darwin to set aside the "big species book" he was drafting and quickly write an abstract of it, which was published in 1859 as On the Origin of Species. Wallace did extensive fieldwork, starting in the Amazon River basin. He then did fieldwork in the Malay Archipelago, where he identified the faunal divide now termed the Wallace Line, which separates the Indonesian archipelago into two distinct parts: a western portion in which the animals are largely of Asian origin, and an eastern portion where the fauna reflect Australasia. He was considered the 19th century's leading expert on the geographical distribution of animal species, and is sometimes called the "father of biogeography", or more specifically of zoogeography. Wallace was one of the leading evolutionary thinkers of the 19th century, working on warning coloration in animals and reinforcement (sometimes known as the Wallace effect), a way that natural selection could contribute to speciation by encouraging the development of barriers against hybridisation. Wallace's 1904 book Man's Place in the Universe was the first serious attempt by a biologist to evaluate the likelihood of life on other planets. He was one of the first scientists to write a serious exploration of whether there was life on Mars. Aside from scientific work, he was a social activist, critical of what he considered to be an unjust social and economic system in 19th-century Britain. His advocacy of spiritualism and his belief in a non-material origin for the higher mental faculties of humans strained his relationship with other scientists. He was one of the first prominent scientists to raise concerns over the environmental impact of human activity. He wrote prolifically on both scientific and social issues; his account of his adventures and observations during his explorations in Southeast Asia, The Malay Archipelago, was first published in 1869. It continues to be both popular and highly regarded. Biography Early life Alfred Russel Wallace was born on 8 January 1823 in Llanbadoc, Monmouthshire. He was the eighth of nine children born to Mary Anne Wallace () and Thomas Vere Wallace. His mother was English, while his father was of Scottish ancestry. His family claimed a connection to William Wallace, a leader of Scottish forces during the Wars of Scottish Independence in the 13th century. Wallace's father graduated in law but never practised it. He owned some income-generating property, but bad investments and failed business ventures resulted in a steady deterioration of the family's financial position. Wallace's mother was from a middle-class family of Hertford, to which place his family moved when Wallace was five years old. He attended Hertford Grammar School until 1837, when he reached the age of 14, the normal leaving age for a pupil not going on to university. Wallace then moved to London to board with his older brother John, a 19-year-old apprentice builder. This was a stopgap measure until William, his oldest brother, was ready to take him on as an apprentice surveyor. While in London, Alfred attended lectures and read books at the London Mechanics Institute. Here he was exposed to the radical political ideas of the Welsh social reformer Robert Owen and of the English-born political theorist Thomas Paine. He left London in 1837 to live with William and work as his apprentice for six years. They moved repeatedly to different places in Mid-Wales. Then at the end of 1839, they moved to Kington, Herefordshire, near the Welsh border, before eventually settling at Neath in Wales. Between 1840 and 1843, Wallace worked as a land surveyor in the countryside of the west of England and Wales. The natural history of his surroundings aroused his interest; from 1841 he collected flowers and plants as an amateur botanist. One result of Wallace's early travels is a modern controversy about his nationality. Since he was born in Monmouthshire, some sources have considered him to be Welsh. Other historians have questioned this because neither of his parents were Welsh, his family only briefly lived in Monmouthshire, the Welsh people Wallace knew in his childhood considered him to be English, and because he consistently referred to himself as English rather than Welsh. One Wallace scholar has stated that the most reasonable interpretation is therefore that he was an Englishman born in Wales. In 1843 Wallace's father died, and a decline in demand for surveying meant William's business no longer had work available. For a short time Wallace was unemployed, then early in 1844 he was engaged by the Collegiate School in Leicester to teach drawing, mapmaking, and surveying. He had already read George Combe's The Constitution of Man, and after Spencer Hall lectured on mesmerism, Wallace as well as some of the older pupils tried it out. Wallace spent many hours at the town library in Leicester; he read An Essay on the Principle of Population by Thomas Robert Malthus, Alexander von Humboldt's Personal Narrative, Darwin's Journal (The Voyage of the Beagle), and Charles Lyell's Principles of Geology. One evening Wallace met the entomologist Henry Bates, who was 19 years old, and had published an 1843 paper on beetles in the journal Zoologist. He befriended Wallace and started him collecting insects. When Wallace's brother William died in March 1845, Wallace left his teaching position to assume control of his brother's firm in Neath, but his brother John and he were unable to make the business work. After a few months, he found work as a civil engineer for a nearby firm that was working on a survey for a proposed railway in the Vale of Neath. Wallace's work on the survey was largely outdoors in the countryside, allowing him to indulge his new passion for collecting insects. Wallace persuaded his brother John to join him in starting another architecture and civil engineering firm. It carried out projects including the design of a building for the Neath Mechanics' Institute, founded in 1843. William Jevons, the founder of that institute, was impressed by Wallace and persuaded him to give lectures there on science and engineering. In the autumn of 1846, John and he purchased a cottage near Neath, where they lived with their mother and sister Fanny. During this period, he exchanged letters with Bates about books. He had re-read Darwin's Journal, and said "As the Journal of a scientific traveller, it is second only to Humboldt's 'Personal Narrative'—as a work of general interest, perhaps superior to it." In 1845, Wallace had been convinced by Robert Chambers's anonymously published treatise on progressive development, Vestiges of the Natural History of Creation, and found Bates to be more critical. Exploration and study of the natural world Inspired by the chronicles of earlier and contemporary travelling naturalists, Wallace decided to travel abroad. He later wrote that Darwin's Journal and Humboldt's Personal Narrative were "the two works to whose inspiration I owe my determination to visit the tropics as a collector." After reading A voyage up the river Amazon, by William Henry Edwards, Wallace and Bates estimated that by collecting and selling natural history specimens such as birds and insects they could meet their costs, with the prospect of good profits. They therefore engaged as their agent Samuel Stevens who would advertise and arrange sales to institutions and private collectors, for a commission of 20% on sales plus 5% on despatching freight and remittances of money. In 1848, Wallace and Bates left for Brazil aboard the Mischief. They intended to collect insects and other animal specimens in the Amazon Rainforest for their private collections, selling the duplicates to museums and collectors back in Britain to fund the trip. Wallace hoped to gather evidence of the transmutation of species. Bates and he spent most of their first year collecting near Belém, then explored inland separately, occasionally meeting to discuss their findings. In 1849, they were briefly joined by another young explorer, the botanist Richard Spruce, along with Wallace's younger brother Herbert. Herbert soon left (dying two years later from yellow fever), but Spruce, like Bates, would spend over ten years collecting in South America. Wallace spent four years charting the Rio Negro, collecting specimens and making notes on the peoples and languages he encountered as well as the geography, flora, and fauna. On 12 July 1852, Wallace embarked for the UK on the brig Helen. After 25 days at sea, the ship's cargo caught fire, and the crew was forced to abandon ship. All the specimens Wallace had on the ship, mostly collected during the last, and most interesting, two years of his trip, were lost. He managed to save a few notes and pencil sketches, but little else. Wallace and the crew spent ten days in an open boat before being picked up by the brig Jordeson, which was sailing from Cuba to London. The Jordeson provisions were strained by the unexpected passengers, but after a difficult passage on short rations, the ship reached its destination on 1 October 1852. The lost collection had been insured for £200 by Stevens. After his return to Britain, Wallace spent 18 months in London living on the insurance payment, and selling a few specimens that had been shipped home. During this period, despite having lost almost all the notes from his South American expedition, he wrote six academic papers (including "On the Monkeys of the Amazon") and two books, Palm Trees of the Amazon and Their Uses and Travels on the Amazon. At the same time, he made connections with several other British naturalists. Bates and others were collecting in the Amazon area, Wallace was more interested in new opportunities in the Malay Archipelago as demonstrated by the travel writings of Ida Laura Pfeiffer, and valuable insect specimens she collected which Stevens sold as her agent. In March 1853 Wallace wrote to Sir James Brooke, Rajah of Sarawak, who was then in London, and who arranged assistance in Sarawak for Wallace. In June Wallace wrote to Murchison at the Royal Geographical Society (RGS) for support, proposing to again fund his exploring entirely from sale of duplicate collections. He later recalled that, while researching in the insect-room of the British Museum, he was introduced to Darwin and they "had a few minutes' conversation." After presenting a paper and a large map of the Rio Negro to the RGS, Wallace was elected a Fellow of the society on 27 February 1854. Free passage arranged on Royal Navy ships was stalled by the Crimean War, but eventually the RGS funded first class travel by P&O steamships. Wallace and a young assistant, Charles Allen, embarked at Southampton on 4 March 1854. After the overland journey to Suez and another change of ship at Ceylon they disembarked at Singapore on 19 April 1854. From 1854 to 1862, Wallace travelled around the islands of the Malay Archipelago or East Indies (now Singapore, Malaysia and Indonesia). His main objective "was to obtain specimens of natural history, both for my private collection and to supply duplicates to museums and amateurs". In addition to Allen, he "generally employed one or two, and sometimes three Malay servants" as assistants, and paid large numbers of local people at various places to bring specimens. His total was 125,660 specimens, most of which were insects including more than 83,000 beetles, Several thousand of the specimens represented species new to science, Overall, more than thirty men worked for him at some stage as full-time paid collectors. He also hired guides, porters, cooks and boat crews, so well over 100 individuals worked for him. After collecting expeditions to Bukit Timah Hill in Singapore, and to Malacca, Wallace and Allen reached Sarawak in October 1854, and were welcomed at Kuching by Sir James Brooke's (then) heir Captain John Brooke. Wallace hired a Malay named Ali as a general servant and cook, and spent the early 1855 wet season in a small Dyak house at the foot of Mount Santubong, overlooking a branch outlet of the Sarawak River. He read about species distribution, and wrote his "Sarawak Paper". In March he moved to the Simunjon coal-works, operated by the Borneo Company under Ludvig Verner Helms, and supplemented collecting by paying workers a cent for each insect. A specimen of the previously unknown gliding tree frog Rhacophorus nigropalmatus (now called Wallace's flying frog) came from a Chinese workman who told Wallace that it glided down. Local people also assisted with shooting orangutans. They spent time with Sir James, then in February 1856 Allen chose to stay on with the missionaries at Kuching. On reaching Singapore in May 1856, Wallace hired a bird-skinner. With Ali as cook, they collected for two days on Bali, then from 17 June to 30 August on Lombok. In December 1856, Darwin had written to contacts worldwide to get specimens for his continuing research into variation under domestication. At Lombok's port city, Ampanam, Wallace wrote telling his agent, Stevens, about specimens shipped, including a domestic duck variety "for Mr. Darwin & he would perhaps also like the jungle cock, which is often domesticated here & is doubtless one of the originals of the domestic breed of poultry." In the same letter, Wallace said birds from Bali and Lombok, divided by a narrow strait, "belong to two quite distinct zoological provinces, of which they form the extreme limits", Java, Borneo, Sumatra and Malacca, and Australia and the Moluccas. Stevens arranged publication of relevant paragraphs in the January 1857 issue of The Zoologist. After further investigation, the zoogeographical boundary eventually became known as the Wallace Line. Ali became Wallace's most trusted assistant, a skilled collector and researcher. Wallace collected and preserved the delicate insect specimens, while most of the birds were collected and prepared by his assistants; of those, Ali collected and prepared around 5000. While exploring the archipelago, Wallace refined his thoughts about evolution, and had his famous insight on natural selection. In 1858 he sent an article outlining his theory to Darwin; it was published, along with a description of Darwin's theory, that same year. Accounts of Wallace's studies and adventures were eventually published in 1869 as The Malay Archipelago. This became one of the most popular books of scientific exploration of the 19th century, and has never been out of print. It was praised by scientists such as Darwin (to whom the book was dedicated), by Lyell, and by non-scientists such as the novelist Joseph Conrad. Conrad called the book his "favorite bedside companion" and used information from it for several of his novels, especially Lord Jim. A set of 80 bird skeletons Wallace collected in Indonesia are held in the Cambridge University Museum of Zoology, and described as of exceptional historical significance. Return to England, marriage and children In 1862, Wallace returned to England, where he moved in with his sister Fanny Sims and her husband Thomas. While recovering from his travels, Wallace organised his collections and gave numerous lectures about his adventures and discoveries to scientific societies such as the Zoological Society of London. Later that year, he visited Darwin at Down House, and became friendly with both Lyell and the philosopher Herbert Spencer. During the 1860s, Wallace wrote papers and gave lectures defending natural selection. He corresponded with Darwin about topics including sexual selection, warning coloration, and the possible effect of natural selection on hybridisation and the divergence of species. In 1865, he began investigating spiritualism. After a year of courtship, Wallace became engaged in 1864 to a young woman whom, in his autobiography, he would only identify as Miss L. Miss L. was the daughter of Lewis Leslie who played chess with Wallace, but to Wallace's great dismay, she broke off the engagement. In 1866, Wallace married Annie Mitten. Wallace had been introduced to Mitten through the botanist Richard Spruce, who had befriended Wallace in Brazil and who was a friend of Annie Mitten's father, William Mitten, an expert on mosses. In 1872, Wallace built the Dell, a house of concrete, on land he leased in Grays in Essex, where he lived until 1876. The Wallaces had three children: Herbert (1867–1874), Violet (1869–1945), and William (1871–1951). Financial struggles In the late 1860s and 1870s, Wallace was very concerned about the financial security of his family. While he was in the Malay Archipelago, the sale of specimens had brought in a considerable amount of money, which had been carefully invested by the agent who sold the specimens for Wallace. On his return to the UK, Wallace made a series of bad investments in railways and mines that squandered most of the money, and he found himself badly in need of the proceeds from the publication of The Malay Archipelago. Despite assistance from his friends, he was never able to secure a permanent salaried position such as a curatorship in a museum. To remain financially solvent, Wallace worked grading government examinations, wrote 25 papers for publication between 1872 and 1876 for various modest sums, and was paid by Lyell and Darwin to help edit some of their works. In 1876, Wallace needed a £500 advance from the publisher of The Geographical Distribution of Animals to avoid having to sell some of his personal property. Darwin was very aware of Wallace's financial difficulties and lobbied long and hard to get Wallace awarded a government pension for his lifetime contributions to science. When the £200 annual pension was awarded in 1881, it helped to stabilise Wallace's financial position by supplementing the income from his writings. Social activism In 1881, Wallace was elected as the first president of the newly formed Land Nationalisation Society. In the next year, he published a book, Land Nationalisation; Its Necessity and Its Aims, on the subject. He criticised the UK's free trade policies for the negative impact they had on working-class people. In 1889, Wallace read Looking Backward by Edward Bellamy and declared himself a socialist, despite his earlier foray as a speculative investor. After reading Progress and Poverty, the bestselling book by the progressive land reformist Henry George, Wallace described it as "Undoubtedly the most remarkable and important book of the present century." Wallace opposed eugenics, an idea supported by other prominent 19th-century evolutionary thinkers, on the grounds that contemporary society was too corrupt and unjust to allow any reasonable determination of who was fit or unfit. In his 1890 article "Human Selection" he wrote, "Those who succeed in the race for wealth are by no means the best or the most intelligent ..." He said, "The world does not want the eugenicist to set it straight," "Give the people good conditions, improve their environment, and all will tend towards the highest type. Eugenics is simply the meddlesome interference of an arrogant, scientific priestcraft." In 1898, Wallace wrote a paper advocating a pure paper money system, not backed by silver or gold, which impressed the economist Irving Fisher so much that he dedicated his 1920 book Stabilizing the Dollar to Wallace. Wallace wrote on other social and political topics, including in support of women's suffrage and repeatedly on the dangers and wastefulness of militarism. In an 1899 essay, he called for popular opinion to be rallied against warfare by showing people "that all modern wars are dynastic; that they are caused by the ambition, the interests, the jealousies, and the insatiable greed of power of their rulers, or of the great mercantile and financial classes which have power and influence over their rulers; and that the results of war are never good for the people, who yet bear all its burthens (burdens)". In a letter published by the Daily Mail in 1909, with aviation in its infancy, he advocated an international treaty to ban the military use of aircraft, arguing against the idea "that this new horror is 'inevitable', and that all we can do is to be sure and be in the front rank of the aerial assassins—for surely no other term can so fitly describe the dropping of, say, ten thousand bombs at midnight into an enemy's capital from an invisible flight of airships." In 1898, Wallace published The Wonderful Century: Its Successes and Its Failures, about developments in the 19th century. The first part of the book covered the major scientific and technical advances of the century; the second part covered what Wallace considered to be its social failures including the destruction and waste of wars and arms races, the rise of the urban poor and the dangerous conditions in which they lived and worked, a harsh criminal justice system that failed to reform criminals, abuses in a mental health system based on privately owned sanatoriums, the environmental damage caused by capitalism, and the evils of European colonialism. Wallace continued his social activism for the rest of his life, publishing the book The Revolt of Democracy just weeks before his death. Further scientific work In 1880, he published Island Life as a sequel to The Geographic Distribution of Animals. In November 1886, Wallace began a ten-month trip to the United States to give a series of popular lectures. Most of the lectures were on Darwinism (evolution through natural selection), but he also gave speeches on biogeography, spiritualism, and socio-economic reform. During the trip, he was reunited with his brother John who had emigrated to California years before. He spent a week in Colorado, with the American botanist Alice Eastwood as his guide, exploring the flora of the Rocky Mountains and gathering evidence that would lead him to a theory on how glaciation might explain certain commonalities between the mountain flora of Europe, Asia and North America, which he published in 1891 in the paper "English and American Flowers". He met many other prominent American naturalists and viewed their collections. His 1889 book Darwinism used information he collected on his American trip and information he had compiled for the lectures. Death On 7 November 1913, Wallace died at home, aged 90, in the country house he called Old Orchard, which he had built a decade earlier. His death was widely reported in the press. The New York Times called him "the last of the giants [belonging] to that wonderful group of intellectuals composed of Darwin, Huxley, Spencer, Lyell, Owen, and other scientists, whose daring investigations revolutionized and evolutionized the thought of the century". Another commentator in the same edition said: "No apology need be made for the few literary or scientific follies of the author of that great book on the 'Malay Archipelago'." Some of Wallace's friends suggested that he be buried in Westminster Abbey, but his wife followed his wishes and had him buried in the small cemetery at Broadstone, Dorset. Several prominent British scientists formed a committee to have a medallion of Wallace placed in Westminster Abbey near where Darwin had been buried. The medallion was unveiled on 1 November 1915. Theory of evolution Early evolutionary thinking Wallace began his career as a travelling naturalist who already believed in the transmutation of species. The concept had been advocated by Jean-Baptiste Lamarck, Geoffroy Saint-Hilaire, Erasmus Darwin, and Robert Grant, among others. It was widely discussed, but not generally accepted by leading naturalists, and was considered to have radical, even revolutionary connotations. Prominent anatomists and geologists such as Georges Cuvier, Richard Owen, Adam Sedgwick, and Lyell attacked transmutation vigorously. It has been suggested that Wallace accepted the idea of the transmutation of species in part because he was always inclined to favour radical ideas in politics, religion and science, and because he was unusually open to marginal, even fringe, ideas in science. Wallace was profoundly influenced by Robert Chambers's Vestiges of the Natural History of Creation, a controversial work of popular science published anonymously in 1844. It advocated an evolutionary origin for the solar system, the earth, and living things. Wallace wrote to Henry Bates in 1845 describing it as "an ingenious hypothesis strongly supported by some striking facts and analogies, but which remains to be proven by ... more research". In 1847, he wrote to Bates that he would "like to take some one family [of beetles] to study thoroughly, ... with a view to the theory of the origin of species." Wallace planned fieldwork to test the evolutionary hypothesis that closely related species should inhabit neighbouring territories. During his work in the Amazon basin, he came to realise that geographical barriers—such as the Amazon and its major tributaries—often separated the ranges of closely allied species. He included these observations in his 1853 paper "On the Monkeys of the Amazon". Near the end of the paper he asked the question, "Are very closely allied species ever separated by a wide interval of country?" In February 1855, while working in Sarawak on the island of Borneo, Wallace wrote "On the Law which has Regulated the Introduction of New Species". The paper was published in the Annals and Magazine of Natural History in September 1855. In this paper, he discussed observations of the geographic and geologic distribution of both living and fossil species, a field that became biogeography. His conclusion that "Every species has come into existence coincident both in space and time with a closely allied species" has come to be known as the "Sarawak Law", answering his own question in his paper on the monkeys of the Amazon basin. Although it does not mention possible mechanisms for evolution, this paper foreshadowed the momentous paper he would write three years later. The paper challenged Lyell's belief that species were immutable. Although Darwin had written to him in 1842 expressing support for transmutation, Lyell had continued to be strongly opposed to the idea. Around the start of 1856, he told Darwin about Wallace's paper, as did Edward Blyth who thought it "Good! Upon the whole! ... Wallace has, I think put the matter well; and according to his theory the various domestic races of animals have been fairly developed into species." Despite this hint, Darwin mistook Wallace's conclusion for the progressive creationism of the time, writing that it was "nothing very new ... Uses my simile of tree [but] it seems all creation with him." Lyell was more impressed, and opened a notebook on species in which he grappled with the consequences, particularly for human ancestry. Darwin had already shown his theory to their mutual friend Joseph Hooker and now, for the first time spelt out the full details of natural selection to Lyell. Although Lyell could not agree, he urged Darwin to publish to establish priority. Darwin demurred at first, but began writing up a species sketch of his continuing work in May 1856. Natural selection and Darwin By February 1858, Wallace had been convinced by his biogeographical research in the Malay Archipelago that evolution was real. He later wrote in his autobiography that the problem was of how species change from one well-marked form to another. He stated that it was while he was in bed with a fever that he thought about Malthus's idea of positive checks on human population, and had the idea of natural selection. His autobiography says that he was on the island of Ternate at the time; but the evidence of his journal suggests that he was in fact on the island of Gilolo. From 1858 to 1861, he rented a house on Ternate from the Dutchman Maarten Dirk van Renesse van Duivenbode, which he used as a base for expeditions to other islands such as Gilolo. Wallace describes how he discovered natural selection as follows: Wallace had once briefly met Darwin, and was one of the correspondents whose observations Darwin used to support his own theories. Although Wallace's first letter to Darwin has been lost, Wallace carefully kept the letters he received. In the first letter, dated 1 May 1857, Darwin commented that Wallace's letter of 10 October which he had recently received, as well as Wallace's paper "On the Law which has regulated the Introduction of New Species" of 1855, showed that they thought alike, with similar conclusions, and said that he was preparing his own work for publication in about two years time. The second letter, dated 22 December 1857, said how glad he was that Wallace was theorising about distribution, adding that "without speculation there is no good and original observation" but commented that "I believe I go much further than you". Wallace believed this and sent Darwin his February 1858 essay, "On the Tendency of Varieties to Depart Indefinitely From the Original Type", asking Darwin to review it and pass it to Charles Lyell if he thought it worthwhile. Although Wallace had sent several articles for journal publication during his travels through the Malay archipelago, the Ternate essay was in a private letter. Darwin received the essay on 18 June 1858. Although the essay did not use Darwin's term "natural selection", it did outline the mechanics of an evolutionary divergence of species from similar ones due to environmental pressures. In this sense, it was very similar to the theory that Darwin had worked on for 20 years, but had yet to publish. Darwin sent the manuscript to Charles Lyell with a letter saying "he could not have made a better short abstract! Even his terms now stand as heads of my chapters ... he does not say he wishes me to publish, but I shall, of course, at once write and offer to send to any journal." Distraught about the illness of his baby son, Darwin put the problem to Charles Lyell and Joseph Hooker, who decided to publish the essay in a joint presentation together with unpublished writings which highlighted Darwin's priority. Wallace's essay was presented to the Linnean Society of London on 1 July 1858, along with excerpts from an essay which Darwin had disclosed privately to Hooker in 1847 and a letter Darwin had written to Asa Gray in 1857. Communication with Wallace in the far-off Malay Archipelago involved months of delay, so he was not part of this rapid publication. Wallace accepted the arrangement after the fact, happy that he had been included at all, and never expressed bitterness in public or in private. Darwin's social and scientific status was far greater than Wallace's, and it was unlikely that, without Darwin, Wallace's views on evolution would have been taken seriously. Lyell and Hooker's arrangement relegated Wallace to the position of co-discoverer, and he was not the social equal of Darwin or the other prominent British natural scientists. All the same, the joint reading of their papers on natural selection associated Wallace with the more famous Darwin. This, combined with Darwin's (as well as Hooker's and Lyell's) advocacy on his behalf, would give Wallace greater access to the highest levels of the scientific community. The reaction to the reading was muted, with the president of the Linnean Society remarking in May 1859 that the year had not been marked by any striking discoveries; but, with Darwin's publication of On the Origin of Species later in 1859, its significance became apparent. When Wallace returned to the UK, he met Darwin. Although some of Wallace's opinions in the ensuing years would test Darwin's patience, they remained on friendly terms for the rest of Darwin's life. Over the years, a few people have questioned this version of events. In the early 1980s, two books, one by Arnold Brackman and another by John Langdon Brooks, suggested not only that there had been a conspiracy to rob Wallace of his proper credit, but that Darwin had actually stolen a key idea from Wallace to finish his own theory. These claims have been examined and found unconvincing by a number of scholars. Shipping schedules show that, contrary to these accusations, Wallace's letter could not have been delivered earlier than the date shown in Darwin's letter to Lyell. Defence of Darwin and his ideas After Wallace returned to England in 1862, he became one of the staunchest defenders of Darwin's On the Origin of Species. In an incident in 1863 that particularly pleased Darwin, Wallace published the short paper "Remarks on the Rev. S. Haughton's Paper on the Bee's Cell, And on the Origin of Species". This rebutted a paper by a professor of geology at the University of Dublin that had sharply criticised Darwin's comments in the Origin on how hexagonal honey bee cells could have evolved through natural selection. An even longer defence was a 1867 article in the Quarterly Journal of Science called "Creation by Law". It reviewed George Campbell, the 8th Duke of Argyll's book, The Reign of Law, which aimed to refute natural selection. After an 1870 meeting of the British Science Association, Wallace wrote to Darwin complaining that there were "no opponents left who know anything of natural history, so that there are none of the good discussions we used to have". Differences between Darwin and Wallace Historians of science have noted that, while Darwin considered the ideas in Wallace's paper to be essentially the same as his own, there were differences. Darwin emphasised competition between individuals of the same species to survive and reproduce, whereas Wallace emphasised environmental pressures on varieties and species forcing them to become adapted to their local conditions, leading populations in different locations to diverge. The historian of science Peter J. Bowler has suggested that in the paper he mailed to Darwin, Wallace might have been discussing group selection. Against this, Malcolm Kottler showed that Wallace was indeed discussing individual variation and selection. Others have noted that Wallace appeared to have envisioned natural selection as a kind of feedback mechanism that kept species and varieties adapted to their environment (now called 'stabilizing", as opposed to 'directional' selection). They point to a largely overlooked passage of Wallace's famous 1858 paper, in which he likened "this principle ... [to] the centrifugal governor of the steam engine, which checks and corrects any irregularities". The cybernetician and anthropologist Gregory Bateson observed in the 1970s that, although writing it only as an example, Wallace had "probably said the most powerful thing that'd been said in the 19th Century". Bateson revisited the topic in his 1979 book Mind and Nature: A Necessary Unity, and other scholars have continued to explore the connection between natural selection and systems theory. Warning coloration and sexual selection Warning coloration was one of Wallace's contributions to the evolutionary biology of animal coloration. In 1867, Darwin wrote to Wallace about a problem in explaining how some caterpillars could have evolved conspicuous colour schemes. Darwin had come to believe that many conspicuous animal colour schemes were due to sexual selection, but he saw that this could not apply to caterpillars. Wallace responded that he and Bates had observed that many of the most spectacular butterflies had a peculiar odour and taste, and that he had been told by John Jenner Weir that birds would not eat a certain kind of common white moth because they found it unpalatable. Since the moth was as conspicuous at dusk as a coloured caterpillar in daylight, it seemed likely that the conspicuous colours served as a warning to predators and thus could have evolved through natural selection. Darwin was impressed by the idea. At a later meeting of the Entomological Society, Wallace asked for any evidence anyone might have on the topic. In 1869, Weir published data from experiments and observations involving brightly coloured caterpillars that supported Wallace's idea. Wallace attributed less importance than Darwin to sexual selection. In his 1878 book Tropical Nature and Other Essays, he wrote extensively about the coloration of animals and plants, and proposed alternative explanations for a number of cases Darwin had attributed to sexual selection. He revisited the topic at length in his 1889 book Darwinism. In 1890, he wrote a critical review in Nature of his friend Edward Bagnall Poulton's The Colours of Animals which supported Darwin on sexual selection, attacking especially Poulton's claims on the "aesthetic preferences of the insect world". Wallace effect In 1889, Wallace wrote the book Darwinism, which explained and defended natural selection. In it, he proposed the hypothesis that natural selection could drive the reproductive isolation of two varieties by encouraging the development of barriers against hybridisation. Thus it might contribute to the development of new species. He suggested the following scenario: When two populations of a species had diverged beyond a certain point, each adapted to particular conditions, hybrid offspring would be less adapted than either parent form and so natural selection would tend to eliminate the hybrids. Furthermore, under such conditions, natural selection would favour the development of barriers to hybridisation, as individuals that avoided hybrid matings would tend to have more fit offspring, and thus contribute to the reproductive isolation of the two incipient species. This idea came to be known as the Wallace effect, later called reinforcement. Wallace had suggested to Darwin that natural selection could play a role in preventing hybridisation in private correspondence as early as 1868, but had not worked it out to this level of detail. It continues to be a topic of research in evolutionary biology today, with both computer simulation and empirical results supporting its validity. Application of theory to humans, and role of teleology in evolution In 1864, Wallace published a paper, "The Origin of Human Races and the Antiquity of Man Deduced from the Theory of 'Natural Selection, applying the theory to humankind. Darwin had not yet publicly addressed the subject, although Thomas Huxley had in Evidence as to Man's Place in Nature. Wallace explained the apparent stability of the human stock by pointing to the vast gap in cranial capacities between humans and the great apes. Unlike some other Darwinists, including Darwin himself, he did not "regard modern primitives as almost filling the gap between man and ape". He saw the evolution of humans in two stages: achieving a bipedal posture that freed the hands to carry out the dictates of the brain, and the "recognition of the human brain as a totally new factor in the history of life". Wallace seems to have been the first evolutionist to see that the human brain effectively made further specialisation of the body unnecessary. Wallace wrote the paper for the Anthropological Society of London to address the debate between the supporters of monogenism, the belief that all human races shared a common ancestor and were one species, and the supporters of polygenism, who held that different races had separate origins and were different species. Wallace's anthropological observations of Native Americans in the Amazon, and especially his time living among the Dayak people of Borneo, had convinced him that human beings were a single species with a common ancestor. He still felt that natural selection might have continued to act on mental faculties after the development of the different races; and he did not dispute the nearly universal view among European anthropologists of the time that Europeans were intellectually superior to other races. According to political scientist Adam Jones, "Wallace found little difficulty in reconciling the extermination of native peoples with his progressive political views". In 1864, in the aforementioned paper, he stated "It is the same great law of the preservation of favored races in the struggle for life, which leads to the inevitable extinction of all those low and mentally undeveloped populations with which Europeans come in contact." He argued that the natives die out due to an unequal struggle. Shortly afterwards, Wallace became a spiritualist. At about the same time, he began to maintain that natural selection could not account for mathematical, artistic, or musical genius, metaphysical musings, or wit and humour. He stated that something in "the unseen universe of Spirit" had interceded at least three times in history: the creation of life from inorganic matter; the introduction of consciousness in the higher animals; and the generation of the higher mental faculties in humankind. He believed that the raison d'être of the universe was the development of the human spirit. While some historians have concluded that Wallace's belief that natural selection was insufficient to explain the development of consciousness and the higher functions of the human mind was directly caused by his adoption of spiritualism, other scholars have disagreed, and some maintain that Wallace never believed natural selection applied to those areas. Reaction to Wallace's ideas on this topic among leading naturalists at the time varied. Lyell endorsed Wallace's views on human evolution rather than Darwin's. Wallace's belief that human consciousness could not be entirely a product of purely material causes was shared by a number of prominent intellectuals in the late 19th and early 20th centuries. All the same, many, including Huxley, Hooker, and Darwin himself, were critical of Wallace's views. As the historian of science and sceptic Michael Shermer has stated, Wallace's views in this area were at odds with two major tenets of the emerging Darwinian philosophy. These were that evolution was not teleological (purpose-driven), and that it was not anthropocentric (human-centred). Much later in his life Wallace returned to these themes, that evolution suggested that the universe might have a purpose, and that certain aspects of living organisms might not be explainable in terms of purely materialistic processes. He set out his ideas in a 1909 magazine article entitled The World of Life, later expanded into a book of the same name. Shermer commented that this anticipated ideas about design in nature and directed evolution that would arise from religious traditions throughout the 20th century. Assessment of Wallace's role in history of evolutionary theory In many accounts of the development of evolutionary theory, Wallace is mentioned only in passing as simply being the stimulus to the publication of Darwin's own theory. In reality, Wallace developed his own distinct evolutionary views which diverged from Darwin's, and was considered by many (especially Darwin) to be a leading thinker on evolution in his day, whose ideas could not be ignored. One historian of science has pointed out that, through both private correspondence and published works, Darwin and Wallace exchanged knowledge and stimulated each other's ideas and theories over an extended period. Wallace is the most-cited naturalist in Darwin's Descent of Man, occasionally in strong disagreement. Darwin and Wallace agreed on the importance of natural selection, and some of the factors responsible for it: competition between species and geographical isolation. But Wallace believed that evolution had a purpose ("teleology") in maintaining species' fitness to their environment, whereas Darwin hesitated to attribute any purpose to a random natural process. Scientific discoveries since the 19th century support Darwin's viewpoint, by identifying additional mechanisms and triggers such as mutations triggered by environmental radiation or mutagenic chemicals. Wallace remained an ardent defender of natural selection for the rest of his life. By the 1880s, evolution was widely accepted in scientific circles, but natural selection less so. Wallace's 1889 Darwinism was a response to the scientific critics of natural selection. Of all Wallace's books, it is the most cited by scholarly publications. Other scientific contributions Biogeography and ecology In 1872, at the urging of many of his friends, including Darwin, Philip Sclater, and Alfred Newton, Wallace began research for a general review of the geographic distribution of animals. Initial progress was slow, in part because classification systems for many types of animals were in flux. He resumed the work in earnest in 1874 after the publication of a number of new works on classification. Extending the system developed by Sclater for birds—which divided the earth into six separate geographic regions for describing species distribution—to cover mammals, reptiles and insects as well, Wallace created the basis for the zoogeographic regions in use today. He discussed the factors then known to influence the current and past geographic distribution of animals within each geographic region. These factors included the effects of the appearance and disappearance of land bridges (such as the one currently connecting North America and South America) and the effects of periods of increased glaciation. He provided maps showing factors, such as elevation of mountains, depths of oceans, and the character of regional vegetation, that affected the distribution of animals. He summarised all the known families and genera of the higher animals and listed their known geographic distributions. The text was organised so that it would be easy for a traveller to learn what animals could be found in a particular location. The resulting two-volume work, The Geographical Distribution of Animals, was published in 1876 and served as the definitive text on zoogeography for the next 80 years. The book included evidence from the fossil record to discuss the processes of evolution and migration that had led to the geographical distribution of modern species. For example, he discussed how fossil evidence showed that tapirs had originated in the Northern Hemisphere, migrating between North America and Eurasia and then, much more recently, to South America after which the northern species became extinct, leaving the modern distribution of two isolated groups of tapir species in South America and Southeast Asia. Wallace was very aware of, and interested in, the mass extinction of megafauna in the late Pleistocene. In The Geographical Distribution of Animals (1876) he wrote, "We live in a zoologically impoverished world, from which all the hugest, and fiercest, and strangest forms have recently disappeared". He added that he believed the most likely cause for the rapid extinctions was glaciation, but by the time he wrote World of Life (1911) he had come to believe those extinctions were "due to man's agency". In 1880, Wallace published the book Island Life as a sequel to The Geographical Distribution of Animals. It surveyed the distribution of both animal and plant species on islands. Wallace classified islands into oceanic and two types of continental islands. Oceanic islands, in his view, such as the Galapagos and Hawaiian Islands (then called Sandwich Islands) formed in mid-ocean and never part of any large continent. Such islands were characterised by a complete lack of terrestrial mammals and amphibians, and their inhabitants (except migratory birds and species introduced by humans) were typically the result of accidental colonisation and subsequent evolution. Continental islands, in his scheme, were divided into those that were recently separated from a continent (like Britain) and those much less recently (like Madagascar). Wallace discussed how that difference affected flora and fauna. He discussed how isolation affected evolution and how that could result in the preservation of classes of animals, such as the lemurs of Madagascar that were remnants of once widespread continental faunas. He extensively discussed how changes of climate, particularly periods of increased glaciation, may have affected the distribution of flora and fauna on some islands, and the first portion of the book discusses possible causes of these great ice ages. Island Life was considered a very important work at the time of its publication. It was discussed extensively in scientific circles both in published reviews and in private correspondence. Environmentalism Wallace's extensive work in biogeography made him aware of the impact of human activities on the natural world. In Tropical Nature and Other Essays (1878), he warned about the dangers of deforestation and soil erosion, especially in tropical climates prone to heavy rainfall. Noting the complex interactions between vegetation and climate, he warned that the extensive clearing of rainforest for coffee cultivation in Ceylon (now called Sri Lanka) and India would adversely impact the climate in those countries and lead to their impoverishment due to soil erosion. In Island Life, Wallace again mentioned deforestation and invasive species. On the impact of European colonisation on the island of Saint Helena, he wrote that the island was "now so barren and forbidding that some persons find it difficult to believe that it was once all green and fertile". He explained that the soil was protected by the island's vegetation; once that was destroyed, the soil was washed off the steep slopes by heavy tropical rain, leaving "bare rock or sterile clay". He attributed the "irreparable destruction" to feral goats, introduced in 1513. The island's forests were further damaged by the "reckless waste" of the East India Company from 1651, which used the bark of valuable redwood and ebony trees for tanning, leaving the wood to rot unused. Wallace's comments on environment grew more urgent later in his career. In The World of Life (1911) he wrote that people should view nature "as invested with a certain sanctity, to be used by us but not abused, and never to be recklessly destroyed or defaced." Astrobiology Wallace's 1904 book Man's Place in the Universe was the first serious attempt by a biologist to evaluate the likelihood of life on other planets. He concluded that the Earth was the only planet in the Solar System that could possibly support life, mainly because it was the only one in which water could exist in the liquid phase. His treatment of Mars in this book was brief, and in 1907, Wallace returned to the subject with the book Is Mars Habitable? to criticise the claims made by the American astronomer Percival Lowell that there were Martian canals built by intelligent beings. Wallace did months of research, consulted various experts, and produced his own scientific analysis of the Martian climate and atmospheric conditions. He pointed out that spectroscopic analysis had shown no signs of water vapour in the Martian atmosphere, that Lowell's analysis of Mars's climate badly overestimated the surface temperature, and that low atmospheric pressure would make liquid water, let alone a planet-girding irrigation system, impossible. Richard Milner comments that Wallace "effectively debunked Lowell's illusionary network of Martian canals." Wallace became interested in the topic because his anthropocentric philosophy inclined him to believe that man would be unique in the universe. Other activities Spiritualism Wallace was an enthusiast of phrenology. Early in his career, he experimented with hypnosis, then known as mesmerism, managing to hypnotise some of his students in Leicester. When he began these experiments, the topic was very controversial: early experimenters, such as John Elliotson, had been harshly criticised by the medical and scientific establishment. Wallace drew a connection between his experiences with mesmerism and spiritualism, arguing that one should not deny observations on "a priori grounds of absurdity or impossibility". Wallace began investigating spiritualism in the summer of 1865, possibly at the urging of his older sister Fanny Sims. After reviewing the literature and attempting to test what he witnessed at séances, he came to believe in it. For the rest of his life, he remained convinced that at least some séance phenomena were genuine, despite accusations of fraud and evidence of trickery. One biographer suggested that the emotional shock when his first fiancée broke their engagement contributed to his receptiveness to spiritualism. Other scholars have emphasised his desire to find scientific explanations for all phenomena. In 1874, Wallace visited the spirit photographer Frederick Hudson. He declared that a photograph of him with his deceased mother was genuine. Others reached a different conclusion: Hudson's photographs had previously been exposed as fraudulent in 1872. Wallace's public advocacy of spiritualism and his repeated defence of spiritualist mediums against allegations of fraud in the 1870s damaged his scientific reputation. In 1875 he published the evidence he believed proved his position in On Miracles and Modern Spiritualism. His attitude permanently strained his relationships with previously friendly scientists such as Henry Bates, Thomas Huxley, and even Darwin. Others, such as the physiologist William Benjamin Carpenter and zoologist E. Ray Lankester became publicly hostile to Wallace over the issue. Wallace was heavily criticised by the press; The Lancet was particularly harsh. When, in 1879, Darwin first tried to rally support among naturalists to get a civil pension awarded to Wallace, Joseph Hooker responded that "Wallace has lost caste considerably, not only by his adhesion to Spiritualism, but by the fact of his having deliberately and against the whole voice of the committee of his section of the British Association, brought about a discussion on Spiritualism at one of its sectional meetings ... This he is said to have done in an underhanded manner, and I well remember the indignation it gave rise to in the B.A. Council." Hooker eventually relented and agreed to support the pension request. Flat Earth wager In 1870, a flat-Earth proponent named John Hampden offered a £500 wager (roughly ) in a magazine advertisement to anyone who could demonstrate a convex curvature in a body of water such as a river, canal, or lake. Wallace, intrigued by the challenge and short of money at the time, designed an experiment in which he set up two objects along a stretch of canal. Both objects were at the same height above the water, and he mounted a telescope on a bridge at the same height above the water as well. When seen through the telescope, one object appeared higher than the other, showing the curvature of the Earth. The judge for the wager, the editor of Field magazine, declared Wallace the winner, but Hampden refused to accept the result. He sued Wallace and launched a campaign, which persisted for several years, of writing letters to various publications and to organisations of which Wallace was a member denouncing him as a swindler and a thief. Wallace won multiple libel suits against Hampden, but the resulting litigation cost Wallace more than the amount of the wager, and the controversy frustrated him for years. Anti-vaccination campaign In the early 1880s, Wallace joined the debate over mandatory smallpox vaccination. Wallace originally saw the issue as a matter of personal liberty; but, after studying statistics provided by anti-vaccination activists, he began to question the efficacy of vaccination. At the time, the germ theory of disease was new and far from universally accepted. Moreover, no one knew enough about the human immune system to understand why vaccination worked. Wallace discovered instances where supporters of vaccination had used questionable, in a few cases completely false, statistics to support their arguments. Always suspicious of authority, Wallace suspected that physicians had a vested interest in promoting vaccination, and became convinced that reductions in the incidence of smallpox that had been attributed to vaccination were due to better hygiene and improvements in public sanitation. Another factor in Wallace's thinking was his belief that, because of the action of natural selection, organisms were in a state of balance with their environment, and that everything in nature, served a useful purpose. Wallace pointed out that vaccination, which at the time was often unsanitary, could be dangerous. In 1890, Wallace gave evidence to a Royal Commission investigating the controversy. It found errors in his testimony, including some questionable statistics. The Lancet averred that Wallace and other activists were being selective in their choice of statistics. The commission found that smallpox vaccination was effective and should remain compulsory, though they recommended some changes in procedures to improve safety, and that the penalties for people who refused to comply be made less severe. Years later, in 1898, Wallace wrote a pamphlet, Vaccination a Delusion; Its Penal Enforcement a Crime, attacking the commission's findings. It, in turn, was attacked by The Lancet, which stated that it repeated many of the same errors as his evidence given to the commission. Legacy and historical perception Honours As a result of his writing, Wallace became a well-known figure both as a scientist and as a social activist, and was often sought out for his views. He became president of the anthropology section of the British Association in 1866, and of the Entomological Society of London in 1870. He was elected to the American Philosophical Society in 1873. The British Association elected him as head of its biology section in 1876. He was elected to the Royal Society in 1893. He was asked to chair the International Congress of Spiritualists meeting in London in 1898. He received honorary doctorates and professional honours, such the Royal Society's Royal Medal in 1868 and its Darwin Medal in 1890, and the Order of Merit in 1908. Obscurity and rehabilitation Wallace's fame faded quickly after his death. For a long time, he was treated as a relatively obscure figure in the history of science. Reasons for this lack of attention may have included his modesty, his willingness to champion unpopular causes without regard for his own reputation, and the discomfort of much of the scientific community with some of his unconventional ideas. The reason that the theory of evolution is popularly credited to Darwin is likely the impact of Darwin's On the Origin of Species. Recently, Wallace has become better known, with the publication of at least five book-length biographies and two anthologies of his writings published since 2000. A web page dedicated to Wallace scholarship is maintained at Western Kentucky University. In a 2010 book, the environmentalist Tim Flannery argued that Wallace was "the first modern scientist to comprehend how essential cooperation is to our survival", and suggested that Wallace's understanding of natural selection and his later work on the atmosphere should be seen as a forerunner to modern ecological thinking. A collection of his medals, including the Order of Merit, were sold at auction for £273,000 in 2022. Centenary celebrations The Natural History Museum, London, co-ordinated commemorative events for the Wallace centenary worldwide in the 'Wallace100' project in 2013. On 24 January, his portrait was unveiled in the Main Hall of the museum by Bill Bailey, a fervent admirer. Bailey further championed Wallace in his 2013 BBC Two series "Bill Bailey's Jungle Hero". On 7 November 2013, the 100th anniversary of Wallace's death, Sir David Attenborough unveiled a statue of Wallace at the museum. The statue, sculpted by Anthony Smith, was donated by the A. R. Wallace Memorial Fund. It depicts Wallace as a young man, collecting in the jungle. November 2013 marked the debut of The Animated Life of A. R. Wallace, a paper-puppet animation film dedicated to Wallace's centennial. In addition, Bailey unveiled a bust of Wallace, sculpted by Felicity Crawley, in Twyn Square in Usk, Monmouthshire in November 2021. Bicentenary celebrations Commemorations of the 200th anniversary of Wallace's birth celebrated during the course of 2023 range from naturalist walk events to scientific congresses and presentations. A Harvard Museum of Natural History event in April of 2023 will also include a mixologist-designed special cocktail to honor Wallace's legacy. Memorials Mount Wallace in California's Sierra Nevada mountain range was named in his honour in 1895. In 1928, a house at Richard Hale School (then called Hertford Grammar School, where he had been a pupil) was named after Wallace. The Alfred Russel Wallace building is a prominent feature of the Glyntaff campus at the University of South Wales, by Pontypridd, with several teaching spaces and laboratories for science courses. The Natural Sciences Building at Swansea University and lecture theatre at Cardiff University are named after him, as are impact craters on Mars and the Moon. In 1986, the Royal Entomological Society mounted a year-long expedition to the Dumoga-Bone National Park in North Sulawesi named Project Wallace. A group of Indonesian islands is known as the Wallacea biogeographical region in his honour, and Operation Wallacea, named after the region, awards "Alfred Russel Wallace Grants" to undergraduate ecology students. Several hundred species of plants and animals, both living and fossil, have been named after Wallace, such as the gecko Cyrtodactylus wallacei, and the freshwater stingray Potamotrygon wallacei. Writings Wallace was a prolific author. In 2002, historian of science Michael Shermer published a quantitative analysis of Wallace's publications. He found that Wallace had published 22 full-length books and at least 747 shorter pieces, 508 of which were scientific papers (191 of them published in Nature). He further broke down the 747 short pieces by their primary subjects: 29% were on biogeography and natural history, 27% were on evolutionary theory, 25% were social commentary, 12% were on anthropology, and 7% were on spiritualism and phrenology. An online bibliography of Wallace's writings has more than 750 entries. References Notes Citations Sources Vol. 1 . Vol. 2 Further reading There is an extensive literature on Wallace. Recent books on him include: Vol. 2 (Parts III – VII) (Project Gutenberg). London: Cassell and Company. Published in a single volume by Harper & Brothers Publishers, New York and London, June 1916. External links The Alfred Russel Wallace Website by George Beccaloni Alfred Russel Wallace at Western Kentucky University The Alfred Russel Wallace Correspondence Project Wallace Online – The first complete online edition of the writings of Alfred Russel Wallace Great Lives – Bill Bailey on his hero Alfred Russel Wallace on BBC Radio 4 1823 births 1913 deaths 19th-century English scientists 19th-century British writers 20th-century English non-fiction writers Biogeographers British anti-vaccination activists English coleopterists British deists Charles Darwin English activists English anthropologists English biologists English naturalists English people of Scottish descent English socialists English spiritualists British evolutionary biologists Explorers of Amazonia Explorers of Indonesia Fellows of the Linnean Society of London Fellows of the Royal Geographical Society Fellows of the Royal Society Fellows of the Zoological Society of London Georgists English lepidopterists Botanical illustrators Members of the Order of Merit Natural history of Indonesia People associated with Birkbeck, University of London People educated at Hertford Grammar School People from Broadstone, Dorset People from Grays, Essex People from Kington, Herefordshire People from Usk Philosophical theists Recipients of the Copley Medal Royal Medal winners Victorian writers	6
The Australian Labor Party (ALP), also simply known as Labor, is the major centre-left political party in Australia and one of two major parties in Australian politics, along with the centre-right Liberal Party of Australia. The party has been in government since being elected at the 2022 federal election, and with political branches in each state and territory, they currently form government in New South Wales, Queensland, South Australia, Victoria, Western Australia, the Australian Capital Territory, and the Northern Territory. As of 2023, Tasmania is the only state or territory where Labor forms the opposition. It is the oldest continuous political party in Australian history, being established on 8 May 1901 at Parliament House, Melbourne, the meeting place of the first federal Parliament. The ALP was not founded as a federal party until after the first sitting of the Australian parliament in 1901. It is regarded as descended from labour parties founded in the various Australian colonies by the emerging labour movement in Australia, formally beginning in 1891. Colonial labour parties contested seats from 1891, and federal seats following Federation at the 1901 federal election. The ALP formed the world's first labour party government and the world's first social-democratic government at a national level. At the 1910 federal election, Labor was the first party in Australia to win a majority in either house of the Australian parliament. In every election since 1910 Labor has either served as the governing party or the opposition. There have been 13 Labor Prime Ministers and 10 periods of Federal Labor governments. At the federal and state/colony level, the Australian Labor Party predates both the British Labour Party and the New Zealand Labour Party in party formation, government, and policy implementation. Internationally, the ALP is a member of the Progressive Alliance, a network of social-democratic parties, having previously been a member of the Socialist International. Name and spelling In standard Australian English, the word "labour" is spelt with a u. However, the political party uses the spelling "Labor", without a u. There was originally no standardised spelling of the party's name, with "Labor" and "Labour" both in common usage. According to Ross McMullin, who wrote an official history of the Labor Party, the title page of the proceedings of the Federal Conference used the spelling "Labor" in 1902, "Labour" in 1905 and 1908, and then "Labor" from 1912 onwards. In 1908, James Catts put forward a motion at the Federal Conference that "the name of the party be the Australian Labour Party", which was carried by 22 votes to 2. A separate motion recommending state branches adopt the name was defeated. There was no uniformity of party names until 1918 when the Federal party resolved that state branches should adopt the name "Australian Labor Party", now spelt without a u. Each state branch had previously used a different name, due to their different origins. Although the ALP officially adopted the spelling without a u, it took decades for the official spelling to achieve widespread acceptance. According to McMullin, "the way the spelling of 'Labor Party' was consolidated had more to do with the chap who ended up being in charge of printing the federal conference report than any other reason". Some sources have attributed the official choice of "Labor" to influence from King O'Malley, who was born in the United States and was reputedly an advocate of spelling reform; the spelling without a u is the standard form in American English. It has been suggested that the adoption of the spelling without a u "signified one of the ALP's earliest attempts at modernisation", and served the purpose of differentiating the party from the Australian labour movement as a whole and distinguishing it from other British Empire labour parties. The decision to include the word "Australian" in the party's name, rather than just "Labour Party" as in the United Kingdom, has been attributed to "the greater importance of nationalism for the founders of the colonial parties". History The Australian Labor Party has its origins in the Labour parties founded in the 1890s in the Australian colonies prior to federation. Labor tradition ascribes the founding of Queensland Labour to a meeting of striking pastoral workers under a ghost gum tree (the "Tree of Knowledge") in Barcaldine, Queensland in 1891. The 1891 shearers' strike is credited as being one of the factors for the formation of the Australian Labor Party. On 9 September 1892 the Manifesto of the Queensland Labour Party was read out under the well known Tree of Knowledge at Barcaldine following the Great Shearers' Strike. The State Library of Queensland now holds the manifesto; in 2008 the historic document was added to UNESCO's Memory of the World Australian Register and, in 2009, the document was added to UNESCO's Memory of the World International Register. The Balmain, New South Wales branch of the party claims to be the oldest in Australia. However, the Scone Branch has a receipt for membership fees for the 'Labour Electoral League' dated April 1891. This predates the Balmain claim. This can be attested in the Centenary of the ALP book. Labour as a parliamentary party dates from 1891 in New South Wales and South Australia, 1893 in Queensland, and later in the other colonies. The first election contested by Labour candidates was the 1891 New South Wales election, when Labour candidates (then called the Labor Electoral League of New South Wales) won 35 of 141 seats. The major parties were the Protectionist and Free Trade parties and Labour held the balance of power. It offered parliamentary support in exchange for policy concessions. The United Labor Party (ULP) of South Australia was founded in 1891, and three candidates were that year elected to the South Australian Legislative Council. The first successful South Australian House of Assembly candidate was John McPherson at the 1892 East Adelaide by-election. Richard Hooper however was elected as an Independent Labor candidate at the 1891 Wallaroo by-election, while he was the first "labor" member of the House of Assembly he was not a member of the newly formed ULP. At the 1893 South Australian elections the ULP was immediately elevated to balance of power status with 10 of 54 lower house seats. The liberal government of Charles Kingston was formed with the support of the ULP, ousting the conservative government of John Downer. So successful, less than a decade later at the 1905 state election, Thomas Price formed the world's first stable Labor government. John Verran led Labor to form the state's first of many majority governments at the 1910 state election. In 1899, Anderson Dawson formed a minority Labour government in Queensland, the first in the world, which lasted one week while the conservatives regrouped after a split. The colonial Labour parties and the trade unions were mixed in their support for the Federation of Australia. Some Labour representatives argued against the proposed constitution, claiming that the Senate as proposed was too powerful, similar to the anti-reformist colonial upper houses and the British House of Lords. They feared that federation would further entrench the power of the conservative forces. However, the first Labour leader and Prime Minister Chris Watson was a supporter of federation. Historian Celia Hamilton, examining New South Wales, argues for the central role of Irish Catholics. Before 1890, they opposed Henry Parkes, the main Liberal leader, and of free trade, seeing them both as the ideals of Protestant Englishmen who represented landholding and large business interests. In the strike of 1890 the leading Catholic, Sydney's Archbishop Patrick Francis Moran was sympathetic toward unions, but Catholic newspapers were negative. After 1900, says Hamilton, Irish Catholics were drawn to the Labour Party because its stress on equality and social welfare fitted with their status as manual labourers and small farmers. In the 1910 elections Labour gained in the more Catholic areas and the representation of Catholics increased in Labour's parliamentary ranks. Early decades at the federal level The federal parliament in 1901 was contested by each state Labour Party. In total, they won 15 of the 75 seats in the House of Representatives, collectively holding the balance of power, and the Labour members now met as the Federal Parliamentary Labour Party (informally known as the caucus) on 8 May 1901 at Parliament House, Melbourne, the meeting place of the first federal Parliament. The caucus decided to support the incumbent Protectionist Party in minority government, while the Free Trade Party formed the opposition. It was some years before there was any significant structure or organisation at a national level. Labour under Chris Watson doubled its vote at the 1903 federal election and continued to hold the balance of power. In April 1904, however, Watson and Alfred Deakin fell out over the issue of extending the scope of industrial relations laws concerning the Conciliation and Arbitration Bill to cover state public servants, the fallout causing Deakin to resign. Free Trade leader George Reid declined to take office, which saw Watson become the first Labour Prime Minister of Australia, and the world's first Labour head of government at a national level (Anderson Dawson had led a short-lived Labour government in Queensland in December 1899), though his was a minority government that lasted only four months. He was aged only 37, and is still the youngest Prime Minister in Australia's history. George Reid of the Free Trade Party adopted a strategy of trying to reorient the party system along Labour vs. non-Labour lines prior to the 1906 federal election and renamed his Free Trade Party to the Anti-Socialist Party. Reid envisaged a spectrum running from socialist to anti-socialist, with the Protectionist Party in the middle. This attempt struck a chord with politicians who were steeped in the Westminster tradition and regarded a two-party system as very much the norm. Although Watson further strengthened Labour's position in 1906, he stepped down from the leadership the following year, to be succeeded by Andrew Fisher who formed a minority government lasting seven months from late 1908 to mid 1909. At the 1910 federal election, Fisher led Labor to victory, forming Australia's first elected federal majority government, Australia's first elected Senate majority, the world's first Labour Party majority government at a national level, and after the 1904 Chris Watson minority government the world's second Labour Party government at a national level. It was the first time a Labour Party had controlled any house of a legislature, and the first time the party controlled both houses of a bicameral legislature. The state branches were also successful, except in Victoria, where the strength of Deakinite liberalism inhibited the party's growth. The state branches formed their first majority governments in New South Wales and South Australia in 1910, Western Australia in 1911, Queensland in 1915 and Tasmania in 1925. Such success eluded equivalent social democratic and labour parties in other countries for many years. Analysis of the early NSW Labor caucus reveals "a band of unhappy amateurs", made up of blue collar workers, a squatter, a doctor, and even a mine owner, indicating that the idea that only the socialist working class formed Labor is untrue. In addition, many members from the working class supported the liberal notion of free trade between the colonies; in the first grouping of state MPs, 17 of the 35 were free-traders. In the aftermath of World War I and the Russian Revolution of 1917, support for socialism grew in trade union ranks, and at the 1921 All-Australian Trades Union Congress a resolution was passed calling for "the socialisation of industry, production, distribution and exchange." The 1922 Labor Party National Conference adopted a similarly worded "socialist objective," which remained official policy for many years. The resolution was immediately qualified, however, by the "Blackburn amendment," which said that "socialisation" was desirable only when was necessary to "eliminate exploitation and other anti-social features." In practice the socialist objective was a dead letter. Only once has a federal Labor government attempted to nationalise any industry (Ben Chifley's bank nationalisation of 1947), and that was held by the High Court to be unconstitutional. The commitment to nationalisation was dropped by Gough Whitlam, and Bob Hawke's government carried out many free market reforms including the floating of the dollar and privatisation of state enterprises such as Qantas airways and the Commonwealth Bank. The Labor Party is commonly described as a social democratic party, and its constitution stipulates that it is a democratic socialist party. The party was created by, and has always been influenced by, the trade unions, and in practice its policy at any given time has usually been the policy of the broader labour movement. Thus at the first federal election 1901 Labor's platform called for a White Australia policy, a citizen army and compulsory arbitration of industrial disputes. Labor has at various times supported high tariffs and low tariffs, conscription and pacifism, White Australia and multiculturalism, nationalisation and privatisation, isolationism and internationalism. Historically, Labor and its affiliated unions were strong defenders of the White Australia policy, which banned all non-European migration to Australia. This policy was partly motivated by 19th century theories about "racial purity" and by fears of economic competition from low-wage overseas workers which was shared by the vast majority of Australians and all major political parties. In practice the Labor party opposed all migration, on the grounds that immigrants competed with Australian workers and drove down wages, until after World War II, when the Chifley government launched a major immigration program. The party's opposition to non-European immigration did not change until after the retirement of Arthur Calwell as leader in 1967. Subsequently, Labor has become an advocate of multiculturalism, although some of its trade union base and some of its members continue to oppose high immigration levels. World War II and beyond The Curtin and Chifley governments governed Australia through the latter half of the Second World War and initial stages of transition to peace. Labor leader John Curtin became prime minister in October 1941 when two independents crossed the floor of Parliament. Labor, led by Curtin, then led Australia through the years of the Pacific War. In December 1941, Curtin announced that "Australia looks to America, free of any pangs as to our traditional links or kinship with the United Kingdom", thus helping to establish the Australian-American alliance (later formalised as ANZUS by the Menzies Government). Remembered as a strong war time leader and for a landslide win at the 1943 federal election, Curtin died in office just prior to the end of the war and was succeeded by Ben Chifley. Chifley Labor won the 1946 federal election and oversaw Australia's initial transition to a peacetime economy. Labor was defeated at the 1949 federal election. At the conference of the New South Wales Labor Party in June 1949, Chifley sought to define the labour movement as follows: "We have a great objective – the light on the hill – which we aim to reach by working for the betterment of mankind. [...] [Labor would] bring something better to the people, better standards of living, greater happiness to the mass of the people." To a large extent, Chifley saw centralisation of the economy as the means to achieve such ambitions. With an increasingly uncertain economic outlook, after his attempt to nationalise the banks and a strike by the Communist-dominated Miners' Federation, Chifley lost office in 1949 to Robert Menzies' Liberal-National Coalition. Labor commenced a 23-year period in opposition. The party was primarily led during this time by H. V. Evatt and Arthur Calwell. Various ideological beliefs were factionalised under reforms to the ALP under Gough Whitlam, resulting in what is now known as the Socialist Left who tend to favour a more interventionist economic policy and more socially progressive ideals, and Labor Right, the now dominant faction that tends to be more economically liberal and focus to a lesser extent on social issues. The Whitlam Labor government, marking a break with Labor's socialist tradition, pursued social-democratic policies rather than democratic socialist policies. In contrast to earlier Labor leaders, Whitlam also cut tariffs by 25 percent. Whitlam led the Federal Labor Party back to office at the 1972 and 1974 federal elections, and passed a large amount of legislation. The Whitlam government lost office following the 1975 Australian constitutional crisis and dismissal by Governor-General John Kerr after the Coalition blocked supply in the Senate after a series of political scandals, and was defeated at the 1975 federal election in the largest landslide of Australian federal history. Whitlam remains the only Prime Minister to have his commission terminated in that manner. Whitlam also lost the 1977 federal election and subsequently resigned as leader. Bill Hayden succeeded Whitlam as leader. At the 1980 federal election, the party achieved a big swing, though the unevenness of the swing around the nation prevented an ALP victory. In 1983, Bob Hawke became leader of the party after Hayden resigned to avoid a leadership spill. Bob Hawke led Labor back to office at the 1983 federal election and the party won four consecutive elections under Hawke. In December 1991 Paul Keating defeated Bob Hawke in a leadership spill. The ALP then won the 1993 federal election. It was in power for five terms over 13 years, until severely defeated by John Howard at the 1996 federal election. This was the longest period the party has ever been in government at the national level. Kim Beazley led the party to the 1998 federal election, winning 51 percent of the two-party-preferred vote but falling short on seats, and the ALP lost ground at the 2001 federal election. After a brief period when Simon Crean served as ALP leader, Mark Latham led Labor to the 2004 federal election but lost further ground. Beazley replaced Latham in 2005; not long afterwards he in turn was forced out of the leadership by Kevin Rudd. Rudd went on to defeat John Howard at the 2007 federal election with 52.7 percent of the two-party vote (Howard became the first Prime Minister since Stanley Melbourne Bruce to lose not just the election but his own parliamentary seat). The Rudd government ended prior to the 2010 federal election with the overthrow of Rudd as leader of the Party by deputy leader Julia Gillard. Gillard, who was also the first woman to serve as Prime Minister of Australia, remained Prime Minister in a hung parliament following the election. Her government lasted until 2013, when Gillard lost a leadership spill, with Rudd becoming leader once again. Later that year the ALP lost the 2013 election. After this defeat, Bill Shorten became leader of the party. The party narrowly lost the 2016 election, yet gained 14 seats. It remained in opposition after the 2019 election, despite having been ahead in opinion polls for the preceding two years. The party lost in 2019 some of the seats which it had won back in 2016. After the 2019 defeat, Shorten resigned from the leadership, though he remained in parliament. Anthony Albanese was elected as leader unopposed and led the party to victory in the 2022 election. Between the 2007 federal election and the 2008 Western Australian state election, Labor was in government nationally and in all eight state and territory legislatures. This was the first time any single party or any coalition had achieved this since the ACT and the NT gained self-government. Labor narrowly lost government in Western Australia at the 2008 state election and Victoria at the 2010 state election. These losses were further compounded by landslide defeats in New South Wales in 2011, Queensland in 2012, the Northern Territory in 2012, Federally in 2013 and Tasmania in 2014. Labor secured a good result in the Australian Capital Territory in 2012 and, despite losing its majority, the party retained government in South Australia in 2014. However, most of these reversals proved only temporary with Labor returning to government in Victoria in 2014 and in Queensland in 2015 after spending only one term in opposition in both states. Furthermore, after winning the 2014 Fisher by-election by nine votes from a 7.3 percent swing, the Labor government in South Australia went from minority to majority government. Labor won landslide victories in the 2016 Northern Territory election, the 2017 Western Australian election and the 2018 Victorian state election. However, Labor lost the 2018 South Australian state election after 16 years in government. In 2022, Labor returned to government after defeating the Liberal Party in the 2022 South Australian state election. Despite favourable polling, the party also did not return to government in the 2019 New South Wales state election or the 2019 federal election. The latter has been considered a historic upset due to Labor's consistent and significant polling lead; the result has been likened to the Coalition's loss in the 1993 federal election, with 2019 retrospectively referred to as the "unloseable election". Anthony Albanese later led the party into the 2022 Australian federal election, in which the party once again won a majority government. In 2023, Labor won the 2023 New South Wales state election returning to government for the first time since 2011. This victory marked the first time in 15 years that Labor were in government in all mainland states. National platform The policy of the Australian Labor Party is contained in its National Platform, which is approved by delegates to Labor's National Conference, held every three years. According to the Labor Party's website, "The Platform is the result of a rigorous and constructive process of consultation, spanning the nation and including the cooperation and input of state and territory policy committees, local branches, unions, state and territory governments, and individual Party members. The Platform provides the policy foundation from which we can continue to work towards the election of a federal Labor government." The platform gives a general indication of the policy direction which a future Labor government would follow, but does not commit the party to specific policies. It maintains that "Labor's traditional values will remain a constant on which all Australians can rely." While making it clear that Labor is fully committed to a market economy, it says that: "Labor believes in a strong role for national government – the one institution all Australians truly own and control through our right to vote." Labor "will not allow the benefits of change to be concentrated in fewer and fewer hands, or located only in privileged communities. The benefits must be shared by all Australians and all our regions." The platform and Labor "believe that all people are created equal in their entitlement to dignity and respect, and should have an equal chance to achieve their potential." For Labor, "government has a critical role in ensuring fairness by: ensuring equal opportunity; removing unjustifiable discrimination; and achieving a more equitable distribution of wealth, income and status." Further sections of the platform stress Labor's support for equality and human rights, labour rights and democracy. In practice, the platform provides only general policy guidelines to Labor's federal, state and territory parliamentary leaderships. The policy Labor takes into an election campaign is determined by the Cabinet (if the party is in office) or the Shadow Cabinet (if it is in opposition), in consultation with key interest groups within the party, and is contained in the parliamentary Leader's policy speech delivered during the election campaign. When Labor is in office, the policies it implements are determined by the Cabinet, subject to the platform. Generally, it is accepted that while the platform binds Labor governments, how and when it is implemented remains the prerogative of the parliamentary caucus. It is now rare for the platform to conflict with government policy, as the content of the platform is usually developed in close collaboration with the party's parliamentary leadership as well as the factions. However, where there is a direct contradiction with the platform, Labor governments have sought to change the platform as a prerequisite for a change in policy. For example, privatisation legislation under the Hawke government occurred only after holding a special national conference to debate changing the platform., Party structure National executive and secretariat The Australian Labor Party National Executive is the party's chief administrative authority, subject only to Labor's national conference. The executive is responsible for organising the triennial national conference; carrying out the decisions of the conference; interpreting the national constitution, the national platform and decisions of the national conference; and directing federal members. The party holds a national conference every three years, which consists of delegates representing the state and territory branches (many coming from affiliated trade unions, although there is no formal requirement for unions to be represented at the national conference). The national conference decides the party's platform, elects the national executive and appoints office-bearers such as the national secretary, who also serves as national campaign director during elections. The current national secretary is Paul Erickson. The most recent national conference was the 48th conference held in December 2018. The head office of the ALP, the national secretariat, is managed by the national secretary. It plays a dual role of administration and a national campaign strategy. It acts as a permanent secretariat to the national executive by managing and assisting in all administrative affairs of the party. As the national secretary also serves as national campaign director during elections, it is also responsible for the national campaign strategy and organisation. Federal Parliamentary Labor Party The elected members of the Labor party in both houses of the national Parliament meet as the Federal Parliamentary Labor Party, also known as the Australian Labor Party Caucus (see also caucus). Besides discussing parliamentary business and tactics, the Caucus also is involved in the election of the federal parliamentary leaders. Federal parliamentary leaders Until 2013, the parliamentary leaders were elected by the Caucus from among its members. The leader has historically been a member of the House of Representatives. Since October 2013, a ballot of both the Caucus and by the Labor Party's rank-and-file members determined the party leader and the deputy leader. When the Labor Party is in government, the party leader is the Prime Minister and the deputy leader is the Deputy Prime Minister. If a Labor prime minister resigns or dies in office, the deputy leader acts as prime minister and party leader until a successor is elected. The deputy prime minister also acts as prime minister when the prime minister is on leave or out of the country. Members of the Ministry are also chosen by Caucus, though the leader may allocate portfolios to the ministers. Anthony Albanese is the leader of the federal Labor party, serving since 30 May 2019. The deputy leader is Richard Marles, also serving since 30 May 2019. State and territory branches The Australian Labor Party is a federal party, consisting of eight branches from each state and territory. While the National Executive is responsible for national campaign strategy, each state and territory are an autonomous branch and are responsible for campaigning in their own jurisdictions for federal, state and local elections. State and territory branches consist of both individual members and affiliated trade unions, who between them decide the party's policies, elect its governing bodies and choose its candidates for public office. Members join a state branch and pay a membership fee, which is graduated according to income. The majority of trade unions in Australia are affiliated to the party at a state level. Union affiliation is direct and not through the Australian Council of Trade Unions. Affiliated unions pay an affiliation fee based on the size of their membership. Union affiliation fees make up a large part of the party's income. Other sources of funds for the party include political donations and public funding. Members are generally expected to attend at least one meeting of their local branch each year, although there are differences in the rules from state to state. In practice only a dedicated minority regularly attend meetings. Many members are only active during election campaigns. The members and unions elect delegates to state and territory conferences (usually held annually, although more frequent conferences are often held). These conferences decide policy, and elect state or territory executives, a state or territory president (an honorary position usually held for a one-year term), and a state or territory secretary (a full-time professional position). However, ACT Labor directly elects its president. The larger branches also have full-time assistant secretaries and organisers. In the past the ratio of conference delegates coming from the branches and affiliated unions has varied from state to state, however under recent national reforms at least 50% of delegates at all state and territory conferences must be elected by branches. In some states it also contests local government elections or endorses local candidates. In others it does not, preferring to allow its members to run as non-endorsed candidates. The process of choosing candidates is called preselection. Candidates are preselected by different methods in the various states and territories. In some they are chosen by ballots of all party members, in others by panels or committees elected by the state conference, in still others by a combination of these two. The state and territory Labor branches are the following: Country Labor The Country Labor Party, commonly known as Country Labor, was an affiliated organisation of the Labor Party. Although not expressly defined, Country Labor operated mainly within rural New South Wales, and was mainly seen as an extension of the New South Wales branch that operates in rural electorates. Country Labor was used as a designation by candidates contesting elections in rural areas. The Country Labor Party was registered as a separate party in New South Wales, and was also registered with the Australian Electoral Commission (AEC) for federal elections. It did not have the same status in other states and, consequently, that designation could not be used on the ballot paper. The creation of a separation designation for rural candidates was first suggested at the June 1999 ALP state conference in New South Wales. In May 2000, following Labor's success at the 2000 Benalla by-election in Victoria, Kim Beazley announced that the ALP intended to register a separate "Country Labor Party" with the AEC; this occurred in October 2000. The Country Labor designation was most frequently used in New South Wales. According to the ALP's financial statements for the 2015–16 financial year, NSW Country Labor had around 2,600 members (around 17 percent of the party total), but almost no assets. It recorded a severe funding shortfall at the 2015 New South Wales election, and had to rely on a $1.68-million loan from the party proper to remain solvent. It had been initially assumed that the party proper could provide the money from its own resources, but the NSW Electoral Commission ruled that this was impermissible because the parties were registered separately. Instead the party proper had to loan Country Labor the required funds at a commercial interest rate. The Country Labor Party was de-registered by the New South Wales Electoral Commission in 2021. Australian Young Labor Australian Young Labor is the youth wing of the Australian Labor Party, where all members under age 26 are automatically members. It is the peak youth body within the ALP. Former presidents of AYL have included former NSW Premier Bob Carr, Federal Leader of the House Tony Burke, former Special Minister of State Senator John Faulkner, former Australian Workers Union National Secretary, current Member for Maribyrnong and former Federal Labor Leader Bill Shorten as well as dozens of State Ministers and MPs. The current National President is Jason Byrne from South Australia. Networks The Australian Labor Party is beginning to formally recognise single interest groups within the party. The national platform currently encourages state branches to formally establish these groups known as policy action caucuses. Examples of such groups include the Labor Environment Action Network, Rainbow Labor, Labor For Choice, Labor Women's Network, Labor for Drug Law Reform Labor for Refugees, Labor for Housing, Labor Teachers Network, Aboriginal Labor Network, and recently, Labor Enabled - the action group for Disability Advocacy The Tasmanian Branch of the Australian Labor Party recently gave these groups voting and speaking rights at their state conference. Ideology and factions Labor's constitution has long stated: "The Australian Labor Party is a democratic socialist party and has the objective of the democratic socialisation of industry, production, distribution and exchange, to the extent necessary to eliminate exploitation and other anti-social features in these fields". This "socialist objective" was introduced in 1921, but was later qualified by two further objectives: "maintenance of and support for a competitive non-monopolistic private sector" and "the right to own private property". Labor governments have not attempted the "democratic socialisation" of any industry since the 1940s, when the Chifley government failed to nationalise the private banks, and in fact have privatised several industries such as aviation and banking. Labor's current National Platform describes the party as "a modern social democratic party". Factions The Labor Party has always had a left wing and a right wing, but since the 1970s it has been organised into formal factions. The two largest factions are the Labor Left and the Labor Right. The Labor Right generally supports free-market policies and the US alliance and tends to be conservative on some social issues, whilst the Labor Left favours more state intervention in the economy, is generally less enthusiastic about the US alliance and is often more progressive on social issues. The national factions are themselves divided into sub-factions, primarily state-based such as Centre Unity in New South Wales and Labor Forum in Queensland. Those factions tend to occupy social-liberal, and social democratic positions. Some trade unions are affiliated with the Labor Party and are also factionally aligned. The largest unions supporting the right faction are the Australian Workers' Union (AWU), the Shop, Distributive and Allied Employees' Association (SDA) and the Transport Workers Union (TWU). Important unions supporting the left include the Australian Manufacturing Workers Union (AMWU), United Workers Union, the Construction, Forestry, Maritime, Mining and Energy Union (CFMMEU) and the Community and Public Sector Union (CPSU). Federal election results House of Representatives Donors For the 2015–2016 financial year, the top ten disclosed donors to the ALP were the Health Services Union NSW ($389,000), Village Roadshow ($257,000), Electrical Trades Union of Australia ($171,000), National Automotive Leasing and Salary Packaging Association ($153,000), Westfield Corporation ($150,000), Randazzo C&G Developments ($120,000), Macquarie Telecom ($113,000), Woodside Energy ($110,000), ANZ Bank ($100,000) and Ying Zhou ($100,000), all significantly lower than the 2014 donations by a Chinese donor Zi Chun Wang, which at $850,000 was the largest donation to any political party in the 2013-2014 financial year. At least one newspaper report queried the identity of this donor stating "news archive searches do not produce results for this name, suggesting Wang operates under another name". Another report mentions that in addition to a hotel and a travel agency, the donor's listed address at the Old Communist Cadres Activity Centre in Shijiazhuang houses several Chinese government entities, stating also that another publisher "tried many times without success" to contact the donor on the phone number listed in the donation return form. The Labor Party also receives undisclosed funding through several methods, such as "associated entities". John Curtin House, Industry 2020, IR21 and the Happy Wanderers Club are entities which have been used to funnel donations to the Labor Party without disclosing the source. A 2019 report found that the Labor Party received $33,000 from pro-gun groups during the 2011–2018 periods, however, the Coalition received over $82,000 in donations from pro-gun groups, more than doubling Labor's pro-gun donors. See also Socialism in Australia Australian labour movement Third Way Further reading Ormonde, Paul (1982). A Foolish Passionate Man: a biography of Jim Cairns. Ringwood, Vic, Australia: Penguin Books. ISBN 014005975X. Ormonde, Paul (1972). The Movement. Sydney: Thomas Nelson. SBN 170019683 Charlesworth, M. J. (2000) Ormonde, Paul (Ed). Santamaria : the politics of fear : critical reflections. Richmond, Vic.: Spectrum Publications. ISBN 0867862947 Notes References Bibliography Bramble, Tom, and Rick Kuhn. Labor's Conflict: Big Business, Workers, and the Politics of Class (Cambridge University Press; 2011) 240 pages. Calwell, A. A. (1963). Labor's Role in Modern Society. Melbourne, Lansdowne Press. External links Australian Labor Party Victorian Branch Rules, April 2013 Manifesto of the Queensland Labour Party, 1892 - UNESCO Australian Memory of the World Register 125th anniversary of the Manifesto of the Queensland Labour Party - John Oxley Library Blog, State Library of Queensland. OM69-18 Charles Seymour Papers 1880-1924 - Collection record, State Library of Queensland Charles Seymour Papers 1880-1924: Treasure collection of the John Oxley Library - John Oxley Library Blog, State Library of Queensland. 1891 establishments in Australia Democratic socialist parties in Oceania Former member parties of the Socialist International Centre-left parties Labour parties Political parties established in 1891 Progressive Alliance Republican parties in Australia Social democratic parties in Oceania	8
Aachen ( , ; ; French and traditional English: Aix-la-Chapelle ) is the 13th-largest city in North Rhine-Westphalia and the 27th-largest city of Germany, with around 249,000 inhabitants. It is the westernmost city in Germany, and borders Belgium and the Netherlands to the west, the triborder area. It is located between Maastricht (NL) and Liège (BE) in the west, and Bonn and Cologne in the east. The Wurm River flows through the city, and together with Mönchengladbach, Aachen is the only larger German city in the drainage basin of the Meuse. Aachen is the seat of the City Region Aachen (). Aachen developed from a Roman settlement and (bath complex), subsequently becoming the preferred medieval Imperial residence of Emperor Charlemagne of the Frankish Empire, and, from 936 to 1531, the place where 31 Holy Roman Emperors were crowned Kings of the Germans. One of Germany's leading institutes of higher education in technology, the RWTH Aachen University (), is located in the city. Its university hospital Uniklinikum Aachen is Europe's largest single-building hospital. Aachen's industries include science, engineering and information technology. In 2009, Aachen was ranked eighth among cities in Germany for innovation. The regional dialect spoken in the city is a Central Franconian, Ripuarian variant with strong Limburgish influences from the dialects in the neighbouring Netherlands. As a Rhenish city, Aachen is one of the main centres of carnival celebrations in Germany, along with Cologne and Mainz. The culinary specialty for which the city is best known is Aachener Printen, a type of gingerbread. History Early history Flint quarries on the Lousberg, Schneeberg, and Königshügel, first used during Neolithic times (3000–2500 BC), attest to the long occupation of the site of Aachen, as do recent finds under the modern city's Elisengarten pointing to a former settlement from the same period. Bronze Age (around 1600 BC) settlement is evidenced by the remains of barrows (burial mounds) found, for example, on the Klausberg. During the Iron Age, the area was settled by Celtic peoples who were perhaps drawn by the marshy Aachen basin's hot sulphur springs where they worshipped Grannus, god of light and healing. Later, the 25-hectare Roman spa resort town of Aquae Granni was, according to legend, founded by Grenus, under Hadrian, around 124 AD. Instead, the fictitious founder refers to the Celtic god, and it seems it was the Roman 6th Legion at the start of the 1st century AD that first channelled the hot springs into a spa at Büchel, adding at the end of the same century the Münstertherme spa, two water pipelines, and a probable sanctuary dedicated to Grannus. A kind of forum, surrounded by colonnades, connected the two spa complexes. There was also an extensive residential area. The Romans built bathhouses near Burtscheid. A temple precinct called Vernenum was built near the modern Kornelimünster/Walheim. Today, remains have been found of three bathhouses, including two fountains in the Elisenbrunnen and the Burtscheid bathhouse. Roman civil administration in Aachen eventually broke down as the baths and other public buildings (along with most of the villae rusticae of the surrounding countryside) were destroyed around AD 375 at the start of the migration period. The last Roman coin finds are from the time of Emperor Gratian (AD 375–383). Rome withdrew its troops from the area, but the town remained populated. By 470, the town came to be ruled by the Ripuarian Franks and subordinated to their capital, Cologne. Etymology The name Aachen is a modern descendant, like southern German , , meaning "river" or "stream", from Old High German , meaning "water" or "stream", which directly translates (and etymologically corresponds) to Latin , referring to the springs. The location has been inhabited by humans since the Neolithic era, about 5,000 years ago, attracted to its warm mineral springs. Latin figures in Aachen's Roman name , which meant "waters of Grannus", referring to the Celtic god of healing who was worshipped at the springs. This word became in Walloon and in French, and subsequently after Charlemagne had his palatine chapel built there in the late 8th century and then made the city his empire's capital. As a spa city, Aachen has the right to name itself Bad Aachen, but chooses not to, so it remains on the top of alphabetical lists. Aachen's name in French and German evolved in parallel. The city is known by a variety of different names in other languages: Dialect Aachen is at the western end of the Benrath line that divides High German to the south from the rest of the West Germanic speech area to the north. Aachen's local dialect is called Öcher Platt and belongs to Ripuarian. Middle Ages After Roman times, Pepin the Short had a castle residence built in the town, due to the proximity of the hot springs and also for strategic reasons as it is located between the Rhineland and northern France. Einhard mentions that in 765–766 Pepin spent both Christmas and Easter at Aquis villa () ("and [he] celebrated the birth of the Lord [Christmas] in the town Aquis, and similarly Easter"), which must have been sufficiently equipped to support the royal household for several months. In the year of his coronation as king of the Franks, 768, Charlemagne came to spend Christmas at Aachen for the first time. He remained there in a mansion which he may have extended, although there is no source attesting to any significant building activity at Aachen in his time, apart from the building of the Palatine Chapel (since 1930, cathedral) and the Palace. Charlemagne spent most winters in Aachen between 792 and his death in 814. Aachen became the focus of his court and the political centre of his empire. After his death, the king was buried in the church which he had built; his original tomb has been lost, while his alleged remains are preserved in the Karlsschrein, the shrine where he was reburied after being declared a saint; his saintliness, however, was never officially acknowledged by the Roman Curia as such. In 936, Otto I was crowned king of East Francia in the collegiate church built by Charlemagne. During the reign of Otto II, the nobles revolted and the West Franks under Lothair raided Aachen in 978. Aachen was attacked again by Odo of Champagne, who attacked the imperial palace while Conrad II was absent. Odo relinquished it quickly and was killed soon afterwards. The palace and town of Aachen had fortifying walls built by order of Emperor Frederick Barbarossa between 1172 and 1176. Over the next 500 years, most kings of Germany destined to reign over the Holy Roman Empire were crowned in Aachen. The original audience hall built by Charlemagne was torn down and replaced by the current city hall in 1330. The last king to be crowned here was Ferdinand I in 1531. During the Middle Ages, Aachen remained a city of regional importance, due to its proximity to Flanders; it achieved a modest position in the trade in woollen cloths, favoured by imperial privilege. The city remained a free imperial city, subject to the emperor only, but was politically far too weak to influence the policies of any of its neighbours. The only dominion it had was over Burtscheid, a neighbouring territory ruled by a Benedictine abbess. It was forced to accept that all of its traffic must pass through the "Aachener Reich". Even in the late 18th century the Abbess of Burtscheid was prevented from building a road linking her territory to the neighbouring estates of the duke of Jülich; the city of Aachen even deployed its handful of soldiers to chase away the road-diggers. As an imperial city, Aachen held certain political privileges that allowed it to remain independent of the troubles of Europe for many years. It remained a direct vassal of the Holy Roman Empire throughout most of the Middle Ages. It was also the site of many important church councils, including the Council of 837 and the Council of 1166, a council convened by the antipope Paschal III. Manuscript production Aachen has proved an important site for the production of historical manuscripts. Under Charlemagne's purview, both the Ada Gospels and the Coronation Gospels may have been produced in Aachen. In addition, quantities of the other texts in the court library were also produced locally. During the reign of Louis the Pious (814–840), substantial quantities of ancient texts were produced at Aachen, including legal manuscripts such as the leges scriptorium group, patristic texts including the five manuscripts of the Bamberg Pliny Group. Finally, under Lothair I (840–855), texts of outstanding quality were still being produced. This however marked the end of the period of manuscript production at Aachen. 16th–18th centuries In 1598, following the invasion of Spanish troops from the Netherlands, Rudolf deposed all Protestant office holders in Aachen and even went as far as expelling them from the city. From the early 16th century, Aachen started to lose its power and influence. First the coronations of emperors were moved from Aachen to Frankfurt. This was followed by the religious wars and the great fire of 1656. After the destruction of most of the city in 1656, the rebuilding was mostly in the Baroque style. The decline of Aachen culminated in 1794, when the French, led by General Charles Dumouriez, occupied Aachen. In 1542, the Dutch humanist and physician Francis Fabricius published his study of the health benefits of the hot springs in Aachen. By the middle of the 17th century, the city had developed a considerable reputation as a spa, although this was in part because Aachen was then – and remained well into the 19th century – a place of high-level prostitution. Traces of this hidden agenda of the city's history are found in the 18th-century guidebooks to Aachen as well as to the other spas. The main indication for visiting patients, ironically, was syphilis; only by the end of the 19th century had rheumatism become the most important object of cures at Aachen and Burtscheid. Aachen was chosen as the site of several important congresses and peace treaties: the first congress of Aachen (often referred to as the Congress of Aix-la-Chapelle in English) on 2 May 1668, leading to the First Treaty of Aachen in the same year which ended the War of Devolution. The second congress ended with the second treaty in 1748, ending the War of the Austrian Succession. In 1789, there was a constitutional crisis in the Aachen government, and in 1794 Aachen lost its status as a free imperial city. 19th century On 9 February 1801, the Peace of Lunéville removed the ownership of Aachen and the entire "left bank" of the Rhine from Germany (the Holy Roman Empire) and granted it to France. In 1815, control of the town was passed to the Kingdom of Prussia through an agreement reached by the Congress of Vienna. The third congress took place in 1818, to decide the fate of occupied Napoleonic France. By the middle of the 19th century, industrialisation had swept away most of the city's medieval rules of production and commerce, although the entirely corrupt remains of the city's medieval constitution were kept in place (compare the famous remarks of Georg Forster in his Ansichten vom Niederrhein) until 1801, when Aachen became the "chef-lieu du département de la Roer" in Napoleon's First French Empire. In 1815, after the Napoleonic Wars, the Kingdom of Prussia took over within the new German Confederation. The city was one of its most socially and politically backward centres until the end of the 19th century. Administered within the Rhine Province, by 1880 the population was 80,000. Starting in 1838, the railway from Cologne to Belgium passed through Aachen. The city suffered extreme overcrowding and deplorable sanitary conditions until 1875, when the medieval fortifications were finally abandoned as a limit to building and new, better housing was built in the east of the city, where sanitary drainage was easiest. In December 1880, the Aachen tramway network was opened, and in 1895 it was electrified. In the 19th century and up to the 1930s, the city was important in the production of railway locomotives and carriages, iron, pins, needles, buttons, tobacco, woollen goods, and silk goods. 20th century World War II After World War I, Aachen was occupied by the Allies until 1930, along with the rest of German territory west of the Rhine. Aachen was one of the locations involved in the ill-fated Rhenish Republic. On 21 October 1923, an armed mob took over the city hall. Similar actions took place in Mönchen-Gladbach, Duisburg, and Krefeld. This republic lasted only about a year. Aachen was heavily damaged during World War II. According to Jörg Friedrich in The Fire (2008), two Allied air raids on 11 April and 24 May 1944 "radically destroyed" the city. The first killed 1,525, including 212 children, and bombed six hospitals. During the second, 442 aircraft hit two railway stations, killed 207, and left 15,000 homeless. The raids also destroyed Aachen-Eilendorf and Aachen-Burtscheid. The city and its fortified surroundings were laid siege to from 12 September to 21 October 1944 by the US 1st Infantry Division with the 3rd Armored Division assisting from the south. Around 13 October the US 2nd Armored Division played their part, coming from the north and getting as close as Würselen, while the 30th Infantry Division played a crucial role in completing the encirclement of Aachen on 16 October 1944. With reinforcements from the US 28th Infantry Division the Battle of Aachen continued involving direct assaults through the heavily defended city, which finally forced the German garrison to surrender on 21 October 1944. Aachen was the first German city to be captured by the Western Allies, and its residents welcomed the soldiers as liberators. What remained of the city was destroyed—in some areas completely—during the fighting, mostly by American artillery fire and demolitions carried out by the Waffen-SS defenders. Damaged buildings included the medieval churches of St. Foillan, St. Paul and St. Nicholas, and the Rathaus (city hall), although Aachen Cathedral was largely unscathed. Only 4,000 inhabitants remained in the city; the rest had followed evacuation orders. Its first Allied-appointed mayor, Franz Oppenhoff, was assassinated by an SS commando unit. History of Aachen Jews During the Roman period, Aachen was the site of a flourishing Jewish community. Later, during the Carolingian empire, a Jewish community lived near the royal palace. In 797, Isaac, a Jewish merchant, accompanied two ambassadors of Charlemagne to the court of Harun al-Rashid. He returned to Aachen in July 802, bearing an elephant called Abul-Abbas as a gift for the emperor. During the 13th century, many Jews converted to Christianity, as shown in the records of the Aachen Minster (today's Cathedral). In 1486, the Jews of Aachen offered gifts to Maximilian I during his coronation ceremony. In 1629, the Aachen Jewish community was expelled from the city. In 1667, six Jews were allowed to return. Most of the Aachen Jews settled in the nearby town of Burtscheid. On 16 May 1815, the Jewish community of the city offered an homage in its synagogue to the Prussian king, Friedrich Wilhelm III. A Jewish cemetery was acquired in 1822. 1,345 Jews lived in the city in 1933. The synagogue was destroyed during Kristallnacht in 1938. In 1939, after emigration and arrests, 782 Jews remained in the city. After World War II, only 62 Jews lived there. In 2003, 1,434 Jews were living in Aachen. In Jewish texts, the city of Aachen was called Aish or Ash (אש). 21st century The city of Aachen has developed into a technology hub as a by-product of hosting one of the leading universities of technology in Germany with the RWTH Aachen (Rheinisch-Westfälische Technische Hochschule), known especially for mechanical engineering, automotive and manufacturing technology as well as for its research and academic hospital Klinikum Aachen, one of the largest medical facilities in Europe. Geography Aachen is located in the middle of the Meuse–Rhine Euroregion, close to the border tripoint of Germany, the Netherlands, and Belgium. The town of Vaals in the Netherlands lies nearby at about from Aachen's city centre, while the Dutch city of Heerlen and Eupen, the capital of the German-speaking Community of Belgium, are both located about from Aachen city centre. Aachen lies near the head of the open valley of the Wurm (which today flows through the city in canalised form), part of the larger basin of the Meuse, and about north of the High Fens, which form the northern edge of the Eifel uplands of the Rhenish Massif. The maximum dimensions of the city's territory are from north to south, and from east to west. The city limits are long, of which border Belgium and the Netherlands. The highest point in Aachen, located in the far southeast of the city, lies at an elevation of above sea level. The lowest point, in the north, and on the border with the Netherlands, is at . Climate As the westernmost city in Germany (and close to the Low Countries), Aachen and the surrounding area belongs to a temperate climate zone (Cfb), with humid weather, mild winters, and warm summers. Because of its location north of the Eifel and the High Fens and its subsequent prevailing westerly weather patterns, rainfall in Aachen (on average 805 mm/year) is comparatively higher than, for example, in Bonn (with 669 mm/year). Another factor in the local weather forces of Aachen is the occurrence of Foehn winds on the southerly air currents, which results from the city's geographic location on the northern edge of the Eifel. Because the city is surrounded by hills, it suffers from inversion-related smog. Some areas of the city have become urban heat islands as a result of poor heat exchange, both because of the area's natural geography and from human activity. The city's numerous cold air corridors, which are slated to remain as free as possible from new construction, therefore play an important role in the urban climate of Aachen. The January average is , while the July average is . Precipitation is almost evenly spread throughout the year. Geology The geology of Aachen is very structurally heterogeneous. The oldest occurring rocks in the area surrounding the city originate from the Devonian period and include carboniferous sandstone, greywacke, claystone and limestone. These formations are part of the Rhenish Massif, north of the High Fens. In the Pennsylvanian subperiod of the Carboniferous geological period, these rock layers were narrowed and folded as a result of the Variscan orogeny. After this event, and over the course of the following 200 million years, this area has been continuously flattened. During the Cretaceous period, the ocean penetrated the continent from the direction of the North Sea up to the mountainous area near Aachen, bringing with it clay, sand, and chalk deposits. While the clay (which was the basis for a major pottery industry in nearby Raeren) is mostly found in the lower areas of Aachen, the hills of the Aachen Forest and the Lousberg were formed from upper Cretaceous sand and chalk deposits. More recent sedimentation is mainly located in the north and east of Aachen and was formed through tertiary and quaternary river and wind activities. Along the major thrust fault of the Variscan orogeny, there are over 30 thermal springs in Aachen and Burtscheid. Additionally, the subsurface of Aachen is traversed by numerous active faults that belong to the Rurgraben fault system, which has been responsible for numerous earthquakes in the past, including the 1756 Düren earthquake and the 1992 Roermond earthquake, which was the strongest earthquake ever recorded in the Netherlands. Demographics Aachen has 245,885 inhabitants (as of 31 December 2015), of whom 118,272 are female, and 127,613 are male. At the end of 2009, the foreign-born residents of Aachen made up 13.6 percent of the total population. A significant portion of foreign residents are students at the RWTH Aachen University. Boroughs The city is divided into seven administrative districts, or boroughs, each with its own district council, district leader, and district authority. The councils are elected locally by those who live within the district, and these districts are further subdivided into smaller sections for statistical purposes, with each sub-district named by a two-digit number. The districts of Aachen, including their constituent statistical districts, are: Aachen-Mitte: 10 Markt, 13 Theater, 14 Lindenplatz, 15 St. Jakob, 16 Westpark, 17 Hanbruch, 18 Hörn, 21 Ponttor, 22 Hansemannplatz, 23 Soers, 24 Jülicher Straße, 25 Kalkofen, 31 Kaiserplatz, 32 Adalbertsteinweg, 33 Panneschopp, 34 Rothe Erde, 35 Trierer Straße, 36 Frankenberg, 37 Forst, 41 Beverau, 42 Burtscheid Kurgarten, 43 Burtscheid Abbey, 46 Burtscheid Steinebrück, 47 Marschiertor, 48 Hangeweiher Brand: 51 Brand Eilendorf: 52 Eilendorf Haaren: 53 Haaren (including Verlautenheide) Kornelimünster/Walheim: 61 Kornelimünster, 62 Oberforstbach, 63 Walheim Laurensberg: 64 Vaalserquartier, 65 Laurensberg Richterich: 88 Richterich Regardless of official statistical designations, there are 50 neighbourhoods and communities within Aachen, here arranged by district: Aachen-Mitte: Beverau, Bildchen, Burtscheid, Forst, Frankenberg, Grüne Eiche, Hörn, Lintert, Pontviertel, Preuswald, Ronheide, Rosviertel, Rothe Erde, Stadtmitte, Steinebrück, West Brand: Brand, Eich, Freund, Hitfeld, Niederforstbach Eilendorf: Eilendorf, Nirm Haaren: Haaren, Hüls, Verlautenheide Kornelimünster/Walheim: Friesenrath, Hahn, Kitzenhaus, Kornelimünster, Krauthausen, Lichtenbusch, Nütheim, Oberforstbach, Sief, Schleckheim, Schmithof, Walheim Laurensberg: Gut Kullen, Kronenberg, Laurensberg, Lemiers, Melaten, Orsbach, Seffent, Soers, Steppenberg, Vaalserquartier, Vetschau Richterich: Horbach, Huf, Richterich Neighbouring communities The following cities and communities border Aachen, clockwise from the northwest: Herzogenrath, Würselen, Eschweiler, Stolberg and Roetgen (which are all in the district of Aachen); Raeren, Kelmis and Plombières (Liège Province in Belgium) as well as Vaals, Gulpen-Wittem, Simpelveld, Heerlen and Kerkrade (all in Limburg Province in the Netherlands). Politics Mayor The current Mayor of Aachen is Sibylle Keupen, an independent endorsed by Alliance 90/The Greens, since 2020. The most recent mayoral election was held on 13 September 2020, with a runoff held on 27 September, and the results were as follows: ! rowspan=2 colspan=2\| Candidate ! rowspan=2\| Party ! colspan=2\| First round ! colspan=2\| Second round \|- ! Votes ! % ! Votes ! % \|- \| bgcolor=\| \| align=left\| Sibylle Keupen \| align=left\| Independent (Green) \| 39,662 \| 38.9 \| 53,685 \| 67.4 \|- \| bgcolor=\| \| align=left\| Harald Baal \| align=left\| Christian Democratic Union \| 25,253 \| 24.8 \| 26,003 \| 32.6 \|- \| bgcolor=\| \| align=left\| Mathias Dopatka \| align=left\| Social Democratic Party \| 23,031 \| 22.6 \|- \| bgcolor=\| \| align=left\| Markus Mohr \| align=left\| Alternative for Germany \| 3,387 \| 3.3 \|- \| bgcolor=\| \| align=left\| Wilhelm Helg \| align=left\| Free Democratic Party \| 3,122 \| 3.1 \|- \| bgcolor=\| \| align=left\| Leo Deumens \| align=left\| The Left \| 2,397 \| 2.4 \|- \| bgcolor=\| \| align=left\| Hubert vom Venn \| align=left\| Die PARTEI \| 2,112 \| 2.1 \|- \| bgcolor=\| \| align=left\| Jörg Polzin \| align=left\| Independent \| 938 \| 0.9 \|- \| \| align=left\| Ralf Haupts \| align=left\| Independent Voters' Association Aachen \| 932 \| 0.9 \|- \| bgcolor=\| \| align=left\| Matthias Achilles \| align=left\| Pirate Party Germany \| 848 \| 0.8 \|- \| bgcolor=\| \| align=left\| Adonis Böving \| align=left\| Independent \| 317 \| 0.3 \|- ! colspan=3\| Valid votes ! 101,999 ! 99.2 ! 79,688 ! 99.3 \|- ! colspan=3\| Invalid votes ! 819 ! 0.8 ! 532 ! 0.7 \|- ! colspan=3\| Total ! 102,818 ! 100.0 ! 80,220 ! 100.0 \|- ! colspan=3\| Electorate/voter turnout ! 192,502 ! 53.4 ! 192,435 ! 41.7 \|- \| colspan=7\| Source: State Returning Officer \|} City council The Aachen city council governs the city alongside the Mayor. The most recent city council election was held on 13 September 2020, and the results were as follows: ! colspan=2\| Party ! Votes ! % ! +/- ! Seats ! +/- \|- \| bgcolor=\| \| align=left\| Alliance 90/The Greens (Grüne) \| 34,712 \| 34.1 \| 17.5 \| 20 \| 7 \|- \| bgcolor=\| \| align=left\| Christian Democratic Union (CDU) \| 25,268 \| 24.8 \| 11.5 \| 14 \| 14 \|- \| bgcolor=\| \| align=left\| Social Democratic Party (SPD) \| 18,676 \| 18.3 \| 7.7 \| 11 \| 9 \|- \| bgcolor=\| \| align=left\| Free Democratic Party (FDP) \| 5,042 \| 4.9 \| 0.5 \| 3 \| ±0 \|- \| bgcolor=\| \| align=left\| The Left (Die Linke) \| 4,694 \| 4.6 \| 1.5 \| 3 \| 2 \|- \| bgcolor=\| \| align=left\| Alternative for Germany (AfD) \| 3,816 \| 3.7 \| 1.2 \| 2 \| ±0 \|- \| bgcolor=\| \| align=left\| Volt Germany (Volt) \| 3,784 \| 3.7 \| New \| 2 \| New \|- \| bgcolor=\| \| align=left\| Die PARTEI (PARTEI) \| 2,295 \| 2.3 \| 1.8 \| 1 \| 1 \|- \| \| align=left\| Independent Voters' Association Aachen (UWG) \| 1,632 \| 1.6 \| 0.2 \| 1 \| ±0 \|- \| bgcolor=\| \| align=left\| Pirate Party Germany (Piraten) \| 1,226 \| 1.2 \| 2.2 \| 1 \| 2 \|- \| colspan=7 bgcolor=lightgrey\| \|- \| bgcolor=\| \| align=left\| Ecological Democratic Party (ÖDP) \| 673 \| 0.7 \| New \| 0 \| New \|- \| \| align=left\| Voter Group \| 45 \| 0.0 \| New \| 0 \| New \|- ! colspan=2\| Valid votes ! 101,863 ! 99.1 ! ! ! \|- ! colspan=2\| Invalid votes ! 918 ! 0.9 ! ! ! \|- ! colspan=2\| Total ! 102,781 ! 100.0 ! ! 58 ! 18 \|- ! colspan=2\| Electorate/voter turnout ! 192,502 ! 53.4 ! 0.7 ! ! \|- \| colspan=7\| Source: State Returning Officer \|} Main sights Cathedral Aachen Cathedral was erected on the orders of Charlemagne. Construction began c. AD 796, and it was, on completion c. 798, the largest cathedral north of the Alps. It was modelled after the Basilica of San Vitale, in Ravenna, Italy, and was built by Odo of Metz. Charlemagne also desired for the chapel to compete with the Lateran Palace, both in quality and authority. It was originally built in the Carolingian style, including marble covered walls, and mosaic inlay on the dome. On his death, Charlemagne's remains were interred in the cathedral and can be seen there to this day. The cathedral was extended several times in later ages, turning it into a curious and unique mixture of building styles. The throne and gallery portion date from the Ottonian, with portions of the original opus sectile floor still visible. The 13th century saw gables being added to the roof, and after the fire of 1656, the dome was rebuilt. Finally, a choir was added around the start of the 15th century. After Frederick Barbarossa canonised Charlemagne in 1165 the chapel became a destination for pilgrims. For 600 years, from 936 to 1531, Aachen Cathedral was the church of coronation for 30 German kings and 12 queens. The church built by Charlemagne is still the main attraction of the city. In addition to holding the remains of its founder, it became the burial place of his successor Otto III. In the upper chamber of the gallery, Charlemagne's marble throne is housed. Aachen Cathedral has been designated as a UNESCO World Heritage Site. Most of the marble and columns used in the construction of the cathedral were brought from Rome and Ravenna, including the sarcophagus in which Charlemagne was eventually laid to rest. A bronze bear from Gaul was placed inside, along with an equestrian statue from Ravenna, believed to be Theodric, in contrast to a wolf and a statue of Marcus Aurelius in the Capitoline. Bronze pieces such as the doors and railings, some of which have survived to present day, were cast in a local foundry. Finally, there is uncertainty surrounding the bronze pine cone in the chapel, and where it was created. Wherever it was made, it was also a parallel to a piece in Rome, this in Old St. Peter's Basilica. Cathedral Treasury Aachen Cathedral Treasury has housed, throughout its history, a collection of liturgical objects. The origin of this church treasure is in dispute as some say Charlemagne himself endowed his chapel with the original collection, while the rest were collected over time. Others say all of the objects were collected over time, from such places as Jerusalem and Constantinople. The location of this treasury has moved over time and was unknown until the 15th century when it was located in the Matthiaskapelle (St. Matthew's Chapel) until 1873, when it was moved to the Karlskapelle (Charles' Chapel). From there it was moved to the Hungarian Chapel in 1881 and in 1931 to its present location next to the Allerseelenkapelle (Poor Souls' Chapel). Only six of the original Carolingian objects have remained, and of those only three are left in Aachen: the Aachen Gospels, a diptych of Christ, and an early Byzantine silk. The Coronation Gospels and a reliquary burse of St. Stephen were moved to Vienna in 1798 and the Talisman of Charlemagne was given as a gift in 1804 to Josephine Bonaparte and subsequently to Rheims Cathedral. 210 documented pieces have been added to the treasury since its inception, typically to receive in return legitimisation of linkage to the heritage of Charlemagne. The Lothar Cross, the Gospels of Otto III and multiple additional Byzantine silks were donated by Otto III. Part of the Pala d'Oro and a covering for the Aachen Gospels were made of gold donated by Henry II. Frederick Barbarossa donated the candelabrum that adorns the dome and also once "crowned" the Shrine of Charlemagne, which was placed underneath in 1215. Charles IV donated a pair of reliquaries. Louis XI gave, in 1475, the crown of Margaret of York, and, in 1481, another arm reliquary of Charlemagne. Maximilian I and Charles V both gave numerous works of art by Hans von Reutlingen. Continuing the tradition, objects continued to be donated until the present, each indicative of the period of its gifting, with the last documented gift being a chalice from 1960 made by Ewald Mataré. Rathaus The Aachen Rathaus, (English: Aachen City Hall or Aachen Town Hall) dated from 1330, lies between two central squares, the Markt (marketplace) and the Katschhof (between city hall and cathedral). The coronation hall is on the first floor of the building. Inside one can find five frescoes by the Aachen artist Alfred Rethel which show legendary scenes from the life of Charlemagne, as well as Charlemagne's signature. Also, precious replicas of the Imperial Regalia are kept here. Since 2009, the city hall has been a station on the Route Charlemagne, a tour programme by which historical sights of Aachen are presented to visitors. At the city hall, a museum exhibition explains the history and art of the building and gives a sense of the historical coronation banquets that took place there. A portrait of Napoleon from 1807 by Louis-André-Gabriel Bouchet and one of his wife Joséphine from 1805 by Robert Lefèvre are viewable as part of the tour. As before, the city hall is the seat of the mayor of Aachen and of the city council, and annually the Charlemagne Prize is awarded there. Other sights The Grashaus, a late medieval house at the Fischmarkt, is one of the oldest non-religious buildings in central Aachen. It hosted the city archive, and before that, the Grashaus was the city hall until the present building took over this function. The Elisenbrunnen is one of the most famous sights of Aachen. It is a neo-classical hall covering one of the city's famous fountains. It is just a minute away from the cathedral. Just a few steps in a south-easterly direction lies the 19th-century theatre. Also of note are two remaining city gates, the Ponttor (Pont gate), northwest of the cathedral, and the Marschiertor (marching gate), close to the central railway station. There are also a few parts of both medieval city walls left, most of them integrated into more recent buildings, but some others still visible. There are even five towers left, some of which are used for housing. St. Michael's Church, Aachen was built as a church of the Aachen Jesuit Collegium in 1628. It is attributed to the Rhine mannerism, and a sample of a local Renaissance architecture. The rich façade remained unfinished until 1891, when the architect Peter Friedrich Peters added to it. The church is a Greek Orthodox church today, but the building is used also for concerts because of its good acoustics. The synagogue in Aachen, which was destroyed on the Night of Broken Glass (Kristallnacht), 9 November 1938, was reinaugurated on 18 May 1995. One of the contributors to the reconstructions of the synagogue was Jürgen Linden, the Lord Mayor of Aachen from 1989 to 2009. There are numerous other notable churches and monasteries, a few remarkable 17th- and 18th-century buildings in the particular Baroque style typical of the region, a synagogue, a collection of statues and monuments, park areas, cemeteries, among others. Among the museums in the town are the Suermondt-Ludwig Museum, which has a fine sculpture collection and the Aachen Museum of the International Press, which is dedicated to newspapers from the 16th century to the present. The area's industrial history is reflected in dozens of 19th- and early 20th-century manufacturing sites in the city. Economy Aachen is the administrative centre for the coal-mining industries in neighbouring places to the northeast. Products manufactured in Aachen include electrical goods, fine woolen textiles, foodstuffs (chocolate and candy), glass, machinery, rubber products, furniture, metal products. Also in and around Aachen chemicals, plastics, cosmetics, and needles and pins are produced. Though once a major player in Aachen's economy, today glassware and textile production make up only 10% of total manufacturing jobs in the city. There have been a number of spin-offs from the university's IT technology department. Electric vehicle manufacturing In June 2010, Achim Kampker, together with Günther Schuh, founded a small company to develop electric powered light utility vehicles; in August 2014, it was renamed StreetScooter GmbH. This started as a privately organised research initiative at the RWTH Aachen University, before becoming the independent company in Aachen. Kampker was also the founder and chairman of the European Network for Affordable and Sustainable Electromobility. In May 2014, the company announced that the city of Aachen, the city council Aachen and the savings bank Aachen had ordered electric vehicles from the company. In late 2014, approximately 70 employees were manufacturing 200 vehicles annually in the premises of the Waggonfabrik Talbot, the former Talbot/Bombardier plant in Aachen. In December 2014 DHL Group purchased the StreetScooter company from Günther, operating it as a wholly owned subsidiary. In 2015, Günther founded a new electric vehicle company, e.GO Mobile, which started producing the e.GO Life electric passenger car and other vehicles in April 2019. By April 2016, StreetScooter announced that it would produce 2000 of its electric vans, branded the Work, in Aachen by the end of the year, and would be scaling up to manufacture approximately 10,000 Works annually, starting in 2017, also in Aachen. At the time, this target would make it the largest electric light utility vehicle manufacturer in Europe, surpassing Renault's smaller Kangoo Z.E.. Culture In 1372, Aachen became the first coin-minting city in the world to regularly place an Anno Domini date on a general circulation coin, a groschen. The Scotch Club in Aachen was the first discothèque in Germany, opened from 19 October 1959 until 1992. Klaus Quirini as DJ Heinrich was the first DJ ever. The thriving Aachen black metal scene is among the most notable in Germany, with such bands as Nagelfar, The Ruins of Beverast, Graupel and Verdunkeln. The local speciality of Aachen is an originally hard type of sweet bread, baked in large flat loaves, called Aachener Printen. Unlike Lebkuchen, a German form of gingerbread sweetened with honey, Printen use a syrup made from sugar. Today, a soft version is sold under the same name which follows an entirely different recipe. Asteroid 274835 Aachen, discovered by amateur astronomer Erwin Schwab in 2009, was named after the city. The official was published by the Minor Planet Center on 8 November 2019 (). Kammerchor Carmina Mundi, a professional chamber choir Education RWTH Aachen University, established as Polytechnicum in 1870, is one of Germany's Universities of Excellence with strong emphasis on technological research, especially for electrical and mechanical engineering, computer sciences, physics, and chemistry. The university clinic attached to the RWTH, the Klinikum Aachen, is the biggest single-building hospital in Europe. Over time, a host of software and computer industries have developed around the university. It also maintains a botanical garden (the Botanischer Garten Aachen). FH Aachen, Aachen University of Applied Sciences (AcUAS) was founded in 1971. The AcUAS offers a classic engineering education in professions such as mechatronics, construction engineering, mechanical engineering or electrical engineering. German and international students are educated in more than 20 international or foreign-oriented programmes and can acquire German as well as international degrees (Bachelor/Master) or Doppelabschlüsse (double degrees). Foreign students account for more than 21% of the student body. The Katholische Hochschule Nordrhein-Westfalen – Abteilung Aachen (Catholic University of Applied Sciences Northrhine-Westphalia – Aachen department) offers its some 750 students a variety of degree programmes: social work, childhood education, nursing, and co-operative management. It also has the only programme of study in Germany especially designed for mothers. The (Cologne University of Music) is one of the world's foremost performing arts schools and one of the largest music institutions for higher education in Europe with one of its three campuses in Aachen. The Aachen campus substantially contributes to the Opera/Musical Theatre master's programme by collaborating with the Theater Aachen and the recently established musical theatre chair through the Rheinische Opernakademie. The German army's Technical School (Ausbildungszentrum Technik Landsysteme) is in Aachen. Sports The annual CHIO (short for the French term Concours Hippique International Officiel) is the biggest equestrian meeting of the world and among horsemen is considered to be as prestigious for equitation as the tournament of Wimbledon for tennis. Aachen hosted the 2006 FEI World Equestrian Games. The local football team Alemannia Aachen had a short run in Germany's first division, after its promotion in 2006. However, the team could not sustain its status and is now back in the fourth division. The stadium "Tivoli", opened in 1928, served as the venue for the team's home games and was well known for its incomparable atmosphere throughout the whole of the second division. Before the old stadium's demolition in 2011, it was used by amateurs, whilst the Bundesliga Club held its games in the new stadium "Neuer Tivoli" – meaning New Tivoli—a couple of metres down the road. The building work for the stadium which has a capacity of 32,960, began in May 2008 and was completed by the beginning of 2009. The Ladies in Black women's volleyball team (part of the "PTSV Aachen" sports club since 2013) has played in the first German volleyball league (DVL) since 2008. In June 2022, the local basketball club BG Aachen e.V. was promoted to the 1st regional league. Transport Rail Aachen's railway station, the Hauptbahnhof (Central Station), was constructed in 1841 for the Cologne–Aachen railway line. In 1905, it was moved closer to the city centre. It serves main lines to Cologne, Mönchengladbach and Liège as well as branch lines to Heerlen, Alsdorf, Stolberg and Eschweiler. ICE high speed trains from Brussels via Cologne to Frankfurt am Main and Thalys trains from Paris to Cologne also stop at Aachen Central Station. Four RE lines and two RB lines connect Aachen with the Ruhrgebiet, Mönchengladbach, Spa (Belgium), Düsseldorf and the Siegerland. The Euregiobahn, a regional railway system, reaches several minor cities in the Aachen region. There are four smaller stations in Aachen: Aachen West, Aachen Schanz, Aachen-Rothe Erde and Eilendorf. Slower trains stop at these. Aachen West has gained in importance with the expansion of RWTH Aachen University. Intercity bus stations There are two stations for intercity bus services in Aachen: Aachen West station, in the north-west of the city, and Aachen Wilmersdorfer Straße, in the north-east. Public transport The first horse tram line in Aachen opened in December 1880. After electrification in 1895, it attained a maximum length of in 1915, thus becoming the fourth-longest tram network in Germany. Many tram lines extended to the surrounding towns of Herzogenrath, Stolberg, Alsdorf as well as the Belgian and Dutch communes of Vaals, Kelmis (then Altenberg) and Eupen. The Aachen tram system was linked with the Belgian national interurban tram system. Like many tram systems in Western Europe, the Aachen tram suffered from poorly-maintained infrastructure and was so deemed unnecessary and disrupting for car drivers by local politics. On 28 September 1974, the last line 15 (Vaals–Brand) operated for one last day and was then replaced by buses. A proposal to reinstate a tram/light rail system under the name Campusbahn was dropped after a referendum. Today, the ASEAG (Aachener Straßenbahn und Energieversorgungs-AG, literally "Aachen tram and power supply company") operates a bus network with 68 bus routes. Because of the location at the border, many bus routes extend to Belgium and the Netherlands. Lines 14 to Eupen, Belgium and 44 to Heerlen, Netherlands are jointly operated with Transport en Commun and Veolia Transport Nederland, respectively. ASEAG is one of the main participants in the Aachener Verkehrsverbund (AVV), a tariff association in the region. Along with ASEAG, city bus routes of Aachen are served by private contractors such as Sadar, Taeter, Schlömer, or DB Regio Bus. Line 350, which runs from Maastricht, also enters Aachen. Roads Aachen is connected to the Autobahn A4 (west-east), A44 (north-south) and A544 (a smaller motorway from the A4 to the Europaplatz near the city centre). There are plans to eliminate traffic jams at the Aachen road interchange. Airport Maastricht Aachen Airport is the main airport of Aachen and Maastricht. It is located around northwest of Aachen. There is a shuttle-service between Aachen and the airport. Recreational aviation is served by the (formerly military) Aachen Merzbrück Airfield. Charlemagne Prize Since 1950, a committee of Aachen citizens annually awards the Charlemagne Prize () to personalities of outstanding service to the unification of Europe. It is traditionally awarded on Ascension Day at the City Hall. In 2016, the Charlemagne Award was awarded to Pope Francis. The International Charlemagne Prize of Aachen was awarded in the year 2000 to US president Bill Clinton, for his special personal contribution to co-operation with the states of Europe, for the preservation of peace, freedom, democracy and human rights in Europe, and for his support of the enlargement of the European Union. In 2004, Pope John Paul II's efforts to unite Europe were honoured with an "Extraordinary Charlemagne Medal", which was awarded for the only time ever. Literature Aix is the destination in Robert Browning's poem "How They Brought the Good News from Ghent to Aix", which was published in Dramatic Romances and Lyrics, 1845. The poem is a first-person narrative told, in breathless galloping meter, by one of three riders; an urgent midnight errand to deliver "the news which alone could save Aix from her fate". Notable people Twin towns – sister cities Aachen is twinned with: Montebourg, France (1960) Reims, France (1967) Halifax, England (1979) Toledo, Spain (1985) Ningbo, China (1986) Naumburg, Germany (1988) Arlington County, United States (1993) Kostroma, Russia (2005, suspended since March 2022) Sarıyer, Istanbul, Turkey (2013) Cape Town, South Africa (2017) See also Aachen (district) Aachen Prison Aachen tram Aachener Aachener Chronik Aachener Bachverein List of mayors of Aachen Council of Aachen Treaty of Aix-la-Chapelle (disambiguation) Maastricht Aachen Airport Computer museum Aachen Notes References Sources Further reading Rice, Eric, Music and Ritual at Charlemagne's Marienkirche in Aachen. Kassel: Merseburger, 2009. External links Aachen (district) Belgium–Germany border crossings Catholic pilgrimage sites Cities in North Rhine-Westphalia 1st century Free imperial cities Jewish German history Matter of France Populated places established in the 1st century Rhineland Roman towns and cities in Germany 765 Spa towns in Germany	11
Aspirin, also known as acetylsalicylic acid (ASA), is a nonsteroidal anti-inflammatory drug (NSAID) used to reduce pain, fever, and/or inflammation, and as an antithrombotic. Specific inflammatory conditions which aspirin is used to treat include Kawasaki disease, pericarditis, and rheumatic fever. Aspirin is also used long-term to help prevent further heart attacks, ischaemic strokes, and blood clots in people at high risk. For pain or fever, effects typically begin within 30 minutes. Aspirin works similarly to other NSAIDs but also suppresses the normal functioning of platelets. One common adverse effect is an upset stomach. More significant side effects include stomach ulcers, stomach bleeding, and worsening asthma. Bleeding risk is greater among those who are older, drink alcohol, take other NSAIDs, or are on other blood thinners. Aspirin is not recommended in the last part of pregnancy. It is not generally recommended in children with infections because of the risk of Reye syndrome. High doses may result in ringing in the ears. A precursor to aspirin found in the bark of the willow tree (genus Salix) has been used for its health effects for at least 2,400 years. In 1853, chemist Charles Frédéric Gerhardt treated the medicine sodium salicylate with acetyl chloride to produce acetylsalicylic acid for the first time. Over the next 50 years, other chemists established the chemical structure and devised more efficient production methods. Aspirin is available without medical prescription as a proprietary or generic medication in most jurisdictions. It is one of the most widely used medications globally, with an estimated (50 to 120 billion pills) consumed each year, and is on the World Health Organization's List of Essential Medicines. In 2020, it was the 36th most commonly prescribed medication in the United States, with more than 17million prescriptions. Brand vs. generic name In 1897, scientists at the Bayer company began studying acetylsalicylic acid as a less-irritating replacement medication for common salicylate medicines. By 1899, Bayer had named it "Aspirin" and sold it around the world. Aspirin's popularity grew over the first half of the 20th century, leading to competition between many brands and formulations. The word Aspirin was Bayer's brand name; however, their rights to the trademark were lost or sold in many countries. The name is ultimately a blend of the prefix a(cetyl) + spir Spiraea, the meadowsweet plant genus from which the acetylsalicylic acid was originally derived at Bayer + -in, the common chemical suffix. Chemical properties Aspirin decomposes rapidly in solutions of ammonium acetate or the acetates, carbonates, citrates, or hydroxides of the alkali metals. It is stable in dry air, but gradually hydrolyses in contact with moisture to acetic and salicylic acids. In solution with alkalis, the hydrolysis proceeds rapidly and the clear solutions formed may consist entirely of acetate and salicylate. Like flour mills, factories producing aspirin tablets must control the amount of the powder that becomes airborne inside the building, because the powder-air mixture can be explosive. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit in the United States of 5mg/m3 (time-weighted average). In 1989, the Occupational Safety and Health Administration (OSHA) set a legal permissible exposure limit for aspirin of 5mg/m3, but this was vacated by the AFL-CIO v. OSHA decision in 1993. Synthesis The synthesis of aspirin is classified as an esterification reaction. Salicylic acid is treated with acetic anhydride, an acid derivative, causing a chemical reaction that turns salicylic acid's hydroxyl group into an ester group (R-OH → R-OCOCH3). This process yields aspirin and acetic acid, which is considered a byproduct of this reaction. Small amounts of sulfuric acid (and occasionally phosphoric acid) are almost always used as a catalyst. This method is commonly demonstrated in undergraduate teaching labs. Reaction between acetic acid and salicylic acid can also form aspirin but this esterification reaction is reversible and the presence of water can lead to hydrolysis of the aspirin. So, an anhydrous reagent is preferred. Reaction mechanism Formulations containing high concentrations of aspirin often smell like vinegar because aspirin can decompose through hydrolysis in moist conditions, yielding salicylic and acetic acids. Physical properties Aspirin, an acetyl derivative of salicylic acid, is a white, crystalline, weakly acidic substance, which melts at , and decomposes around . Its acid dissociation constant (pKa) is 3.5 at . Polymorphism Polymorphism, or the ability of a substance to form more than one crystal structure, is important in the development of pharmaceutical ingredients. Many drugs receive regulatory approval for only a single crystal form or polymorph. There was only one proven polymorph Form I of aspirin, though the existence of another polymorph was debated since the 1960s, and one report from 1981 reported that when crystallized in the presence of aspirin anhydride, the diffractogram of aspirin has weak additional peaks. Though at the time it was dismissed as mere impurity, it was, in retrospect, Form II aspirin. Form II was reported in 2005, found after attempted co-crystallization of aspirin and levetiracetam from hot acetonitrile. In form I, pairs of aspirin molecules form centrosymmetric dimers through the acetyl groups with the (acidic) methyl proton to carbonyl hydrogen bonds. In form II, each aspirin molecule forms the same hydrogen bonds, but with two neighbouring molecules instead of one. With respect to the hydrogen bonds formed by the carboxylic acid groups, both polymorphs form identical dimer structures. The aspirin polymorphs contain identical 2-dimensional sections and are therefore more precisely described as polytypes. Pure Form II aspirin could be prepared by seeding the batch with aspirin anhydrate in 15% weight. Mechanism of action Discovery of the mechanism In 1971, British pharmacologist John Robert Vane, then employed by the Royal College of Surgeons in London, showed aspirin suppressed the production of prostaglandins and thromboxanes. For this discovery he was awarded the 1982 Nobel Prize in Physiology or Medicine, jointly with Sune Bergström and Bengt Ingemar Samuelsson. Prostaglandins and thromboxanes Aspirin's ability to suppress the production of prostaglandins and thromboxanes is due to its irreversible inactivation of the cyclooxygenase (COX; officially known as prostaglandin-endoperoxide synthase, PTGS) enzyme required for prostaglandin and thromboxane synthesis. Aspirin acts as an acetylating agent where an acetyl group is covalently attached to a serine residue in the active site of the PTGS enzyme (Suicide inhibition). This makes aspirin different from other NSAIDs (such as diclofenac and ibuprofen), which are reversible inhibitors. Low-dose aspirin use irreversibly blocks the formation of thromboxane A2 in platelets, producing an inhibitory effect on platelet aggregation during the lifetime of the affected platelet (8–9 days). This antithrombotic property makes aspirin useful for reducing the incidence of heart attacks in people who have had a heart attack, unstable angina, ischemic stroke or transient ischemic attack. 40mg of aspirin a day is able to inhibit a large proportion of maximum thromboxane A2 release provoked acutely, with the prostaglandin I2 synthesis being little affected; however, higher doses of aspirin are required to attain further inhibition. Prostaglandins, local hormones produced in the body, have diverse effects, including the transmission of pain information to the brain, modulation of the hypothalamic thermostat, and inflammation. Thromboxanes are responsible for the aggregation of platelets that form blood clots. Heart attacks are caused primarily by blood clots, and low doses of aspirin are seen as an effective medical intervention to prevent a second acute myocardial infarction. COX-1 and COX-2 inhibition At least two different types of cyclooxygenases, COX-1 and COX-2, are acted on by aspirin. Aspirin irreversibly inhibits COX-1 and modifies the enzymatic activity of COX-2. COX-2 normally produces prostanoids, most of which are proinflammatory. Aspirin-modified PTGS2 (prostaglandin-endoperoxide synthase 2) produces lipoxins, most of which are anti-inflammatory. Newer NSAID drugs, COX-2 inhibitors (coxibs), have been developed to inhibit only PTGS2, with the intent to reduce the incidence of gastrointestinal side effects. Several COX-2 inhibitors, such as rofecoxib (Vioxx), have been withdrawn from the market, after evidence emerged that PTGS2 inhibitors increase the risk of heart attack and stroke. Endothelial cells lining the microvasculature in the body are proposed to express PTGS2, and, by selectively inhibiting PTGS2, prostaglandin production (specifically, PGI2; prostacyclin) is downregulated with respect to thromboxane levels, as PTGS1 in platelets is unaffected. Thus, the protective anticoagulative effect of PGI2 is removed, increasing the risk of thrombus and associated heart attacks and other circulatory problems. Since platelets have no DNA, they are unable to synthesize new PTGS once aspirin has irreversibly inhibited the enzyme, an important difference as compared with reversible inhibitors. Furthermore, aspirin, while inhibiting the ability of COX-2 to form pro-inflammatory products such as the prostaglandins, converts this enzyme's activity from a prostaglandin-forming cyclooxygenase to a lipoxygenase-like enzyme: aspirin-treated COX-2 metabolizes a variety of polyunsaturated fatty acids to hydroperoxy products which are then further metabolized to specialized proresolving mediators such as the aspirin-triggered lipoxins, aspirin-triggered resolvins, and aspirin-triggered maresins. These mediators possess potent anti-inflammatory activity. It is proposed that this aspirin-triggered transition of COX-2 from cyclooxygenase to lipoxygenase activity and the consequential formation of specialized proresolving mediators contributes to the anti-inflammatory effects of aspirin. Additional mechanisms Aspirin has been shown to have at least three additional modes of action. It uncouples oxidative phosphorylation in cartilaginous (and hepatic) mitochondria, by diffusing from the inner membrane space as a proton carrier back into the mitochondrial matrix, where it ionizes once again to release protons. Aspirin buffers and transports the protons. When high doses are given, it may actually cause fever, owing to the heat released from the electron transport chain, as opposed to the antipyretic action of aspirin seen with lower doses. In addition, aspirin induces the formation of NO-radicals in the body, which have been shown in mice to have an independent mechanism of reducing inflammation. This reduced leukocyte adhesion is an important step in the immune response to infection; however, evidence is insufficient to show aspirin helps to fight infection. More recent data also suggest salicylic acid and its derivatives modulate signalling through NF-κB. NF-κB, a transcription factor complex, plays a central role in many biological processes, including inflammation. Aspirin is readily broken down in the body to salicylic acid, which itself has anti-inflammatory, antipyretic, and analgesic effects. In 2012, salicylic acid was found to activate AMP-activated protein kinase, which has been suggested as a possible explanation for some of the effects of both salicylic acid and aspirin. The acetyl portion of the aspirin molecule has its own targets. Acetylation of cellular proteins is a well-established phenomenon in the regulation of protein function at the post-translational level. Aspirin is able to acetylate several other targets in addition to COX isoenzymes. These acetylation reactions may explain many hitherto unexplained effects of aspirin. Formulations Aspirin is produced in many formulations, with some differences in effect. In particular, aspirin can cause gastrointestinal bleeding, and formulations are sought which deliver the benefits of aspirin while mitigating harmful bleeding. Formulations may be combined (e.g., buffered + vitamin C). Tablets, typically of about 75–100 mg and 300–320 mg of immediate-release aspirin (IR-ASA). Dispersible tablets. Enteric-coated tablets. Buffered formulations containing aspirin with one of many buffering agents. Formulations of aspirin with vitamin C (ASA-VitC) A phospholipid-aspirin complex liquid formulation, PL-ASA. the phospholipid coating was being trialled to determine if it caused less gastrointestinal damage. Pharmacokinetics Acetylsalicylic acid is a weak acid, and very little of it is ionized in the stomach after oral administration. Acetylsalicylic acid is quickly absorbed through the cell membrane in the acidic conditions of the stomach. The increased pH and larger surface area of the small intestine causes aspirin to be absorbed more slowly there, as more of it is ionized. Owing to the formation of concretions, aspirin is absorbed much more slowly during overdose, and plasma concentrations can continue to rise for up to 24 hours after ingestion. About 50–80% of salicylate in the blood is bound to human serum albumin, while the rest remains in the active, ionized state; protein binding is concentration-dependent. Saturation of binding sites leads to more free salicylate and increased toxicity. The volume of distribution is 0.1–0.2 L/kg. Acidosis increases the volume of distribution because of enhancement of tissue penetration of salicylates. As much as 80% of therapeutic doses of salicylic acid is metabolized in the liver. Conjugation with glycine forms salicyluric acid, and with glucuronic acid to form two different glucuronide esters. The conjugate with the acetyl group intact is referred to as the acyl glucuronide; the deacetylated conjugate is the phenolic glucuronide. These metabolic pathways have only a limited capacity. Small amounts of salicylic acid are also hydroxylated to gentisic acid. With large salicylate doses, the kinetics switch from first-order to zero-order, as metabolic pathways become saturated and renal excretion becomes increasingly important. Salicylates are excreted mainly by the kidneys as salicyluric acid (75%), free salicylic acid (10%), salicylic phenol (10%), and acyl glucuronides (5%), gentisic acid (< 1%), and 2,3-dihydroxybenzoic acid. When small doses (less than 250mg in an adult) are ingested, all pathways proceed by first-order kinetics, with an elimination half-life of about 2.0 h to 4.5 h. When higher doses of salicylate are ingested (more than 4 g), the half-life becomes much longer (15 h to 30 h), because the biotransformation pathways concerned with the formation of salicyluric acid and salicyl phenolic glucuronide become saturated. Renal excretion of salicylic acid becomes increasingly important as the metabolic pathways become saturated, because it is extremely sensitive to changes in urinary pH. A 10- to 20-fold increase in renal clearance occurs when urine pH is increased from 5 to 8. The use of urinary alkalinization exploits this particular aspect of salicylate elimination. It was found that short-term aspirin use in therapeutic doses might precipitate reversible acute kidney injury when the patient was ill with glomerulonephritis or cirrhosis. Aspirin for some patients with chronic kidney disease and some children with congestive heart failure was contraindicated. History Medicines made from willow and other salicylate-rich plants appear in clay tablets from ancient Sumer as well as the Ebers Papyrus from ancient Egypt. Hippocrates referred to the use of salicylic tea to reduce fevers around 400 BC, and willow bark preparations were part of the pharmacopoeia of Western medicine in classical antiquity and the Middle Ages. Willow bark extract became recognized for its specific effects on fever, pain, and inflammation in the mid-eighteenth century. By the nineteenth century, pharmacists were experimenting with and prescribing a variety of chemicals related to salicylic acid, the active component of willow extract. In 1853, chemist Charles Frédéric Gerhardt treated sodium salicylate with acetyl chloride to produce acetylsalicylic acid for the first time; in the second half of the 19th century, other academic chemists established the compound's chemical structure and devised more efficient methods of synthesis. In 1897, scientists at the drug and dye firm Bayer began investigating acetylsalicylic acid as a less-irritating replacement for standard common salicylate medicines, and identified a new way to synthesize it. By 1899, Bayer had dubbed this drug Aspirin and was selling it globally. The word Aspirin was Bayer's brand name, rather than the generic name of the drug; however, Bayer's rights to the trademark were lost or sold in many countries. Aspirin's popularity grew over the first half of the 20th century leading to fierce competition with the proliferation of aspirin brands and products. Aspirin's popularity declined after the development of acetaminophen/paracetamol in 1956 and ibuprofen in 1962. In the 1960s and 1970s, John Vane and others discovered the basic mechanism of aspirin's effects, while clinical trials and other studies from the 1960s to the 1980s established aspirin's efficacy as an anti-clotting agent that reduces the risk of clotting diseases. The initial large studies on the use of low-dose aspirin to prevent heart attacks that were published in the 1970s and 1980s helped spur reform in clinical research ethics and guidelines for human subject research and US federal law, and are often cited as examples of clinical trials that included only men, but from which people drew general conclusions that did not hold true for women. Aspirin sales revived considerably in the last decades of the 20th century, and remain strong in the 21st century with widespread use as a preventive treatment for heart attacks and strokes. Trademark Bayer lost its trademark for Aspirin in the United States and some other countries in actions taken between 1918 and 1921 because it had failed to use the name for its own product correctly and had for years allowed the use of "Aspirin" by other manufacturers without defending the intellectual property rights. Today, aspirin is a generic trademark in many countries. Aspirin, with a capital "A", remains a registered trademark of Bayer in Germany, Canada, Mexico, and in over 80 other countries, for acetylsalicylic acid in all markets, but using different packaging and physical aspects for each. Compendial status United States Pharmacopeia British Pharmacopoeia Medical use Aspirin is used in the treatment of a number of conditions, including fever, pain, rheumatic fever, and inflammatory conditions, such as rheumatoid arthritis, pericarditis, and Kawasaki disease. Lower doses of aspirin have also been shown to reduce the risk of death from a heart attack, or the risk of stroke in people who are at high risk or who have cardiovascular disease, but not in elderly people who are otherwise healthy. There is evidence that aspirin is effective at preventing colorectal cancer, though the mechanisms of this effect are unclear. In the United States, the selective initiation of low-dose aspirin, based on an individualised assessment, has been deemed reasonable for the primary prevention of cardiovascular disease in people aged between 40 and 59 who have a 10% or greater risk of developing cardiovascular disease over the next 10 years and are not at an increased risk of bleeding. Pain Aspirin is an effective analgesic for acute pain, although it is generally considered inferior to ibuprofen because aspirin is more likely to cause gastrointestinal bleeding. Aspirin is generally ineffective for those pains caused by muscle cramps, bloating, gastric distension, or acute skin irritation. As with other NSAIDs, combinations of aspirin and caffeine provide slightly greater pain relief than aspirin alone. Effervescent formulations of aspirin relieve pain faster than aspirin in tablets, which makes them useful for the treatment of migraines. Topical aspirin may be effective for treating some types of neuropathic pain. Aspirin, either by itself or in a combined formulation, effectively treats certain types of a headache, but its efficacy may be questionable for others. Secondary headaches, meaning those caused by another disorder or trauma, should be promptly treated by a medical provider. Among primary headaches, the International Classification of Headache Disorders distinguishes between tension headache (the most common), migraine, and cluster headache. Aspirin or other over-the-counter analgesics are widely recognized as effective for the treatment of tension headaches. Aspirin, especially as a component of an aspirin/paracetamol/caffeine combination, is considered a first-line therapy in the treatment of migraine, and comparable to lower doses of sumatriptan. It is most effective at stopping migraines when they are first beginning. Fever Like its ability to control pain, aspirin's ability to control fever is due to its action on the prostaglandin system through its irreversible inhibition of COX. Although aspirin's use as an antipyretic in adults is well established, many medical societies and regulatory agencies, including the American Academy of Family Physicians, the American Academy of Pediatrics, and the Food and Drug Administration, strongly advise against using aspirin for the treatment of fever in children because of the risk of Reye's syndrome, a rare but often fatal illness associated with the use of aspirin or other salicylates in children during episodes of viral or bacterial infection. Because of the risk of Reye's syndrome in children, in 1986, the US Food and Drug Administration (FDA) required labeling on all aspirin-containing medications advising against its use in children and teenagers. Inflammation Aspirin is used as an anti-inflammatory agent for both acute and long-term inflammation, as well as for the treatment of inflammatory diseases, such as rheumatoid arthritis. Heart attacks and strokes Aspirin is an important part of the treatment of those who have had a heart attack. It is generally not recommended for routine use by people with no other health problems, including those over the age of 70. The 2009 Antithrombotic Trialists' Collaboration published in Lancet evaluated the efficacy and safety of low dose aspirin in secondary prevention. In those with prior ischaemic stroke or acute myocardial infarction, daily low dose aspirin was associated with a 19% relative risk reduction of serious cardiovascular events (non-fatal myocardial infarction, non-fatal stroke, or vascular death). This did come at the expense of a 0.19% absolute risk increase in gastrointestinal bleeding; however, the benefits outweigh the hazard risk in this case. Data from previous trials have suggested that weight-based dosing of aspirin has greater benefits in primary prevention of cardiovascular outcomes. However, more recent trials were not able to replicate similar outcomes using low dose aspirin in low body weight (<70 kg) in specific subset of population studied i.e. elderly and diabetic population, and more evidence is required to study the effect of high dose aspirin in high body weight (≥70 kg). After percutaneous coronary interventions (PCIs), such as the placement of a coronary artery stent, a U.S. Agency for Healthcare Research and Quality guideline recommends that aspirin be taken indefinitely. Frequently, aspirin is combined with an ADP receptor inhibitor, such as clopidogrel, prasugrel, or ticagrelor to prevent blood clots. This is called dual antiplatelet therapy (DAPT). Duration of DAPT was advised in the United States and European Union guidelines after the CURE and PRODIGY studies . In 2020, the systematic review and network meta-analysis from Khan et al. showed promising benefits of short-term (< 6 months) DAPT followed by P2Y12 inhibitors in selected patients, as well as the benefits of extended-term (> 12 months) DAPT in high risk patients. In conclusion, the optimal duration of DAPT after PCIs should be personalized after outweighing each patient's risks of ischemic events and risks of bleeding events with consideration of multiple patient-related and procedure-related factors. Moreover, aspirin should be continued indefinitely after DAPT is complete. The status of the use of aspirin for the primary prevention in cardiovascular disease is conflicting and inconsistent, with recent changes from previously recommending it widely decades ago, and that some referenced newer trials in clinical guidelines show less of benefit of adding aspirin alongside other anti-hypertensive and cholesterol lowering therapies. The ASCEND study demonstrated that in high-bleeding risk diabetics with no prior cardiovascular disease, there is no overall clinical benefit (12% decrease in risk of ischaemic events v/s 29% increase in GI bleeding) of low dose aspirin in preventing the serious vascular events over a period of 7.4 years. Similarly, the results of the ARRIVE study also showed no benefit of same dose of aspirin in reducing the time to first cardiovascular outcome in patients with moderate risk of cardiovascular disease over a period of five years. Aspirin has also been suggested as a component of a polypill for prevention of cardiovascular disease. Complicating the use of aspirin for prevention is the phenomenon of aspirin resistance. For people who are resistant, aspirin's efficacy is reduced. Some authors have suggested testing regimens to identify people who are resistant to aspirin. As of , the United States Preventive Services Task Force (USPSTF) determined that there was a "small net benefit" for patients aged 40–59 with a 10% or greater 10-year cardiovascular disease (CVD) risk, and "no net benefit" for patients aged over 60. Determining the net benefit was based on balancing the risk reduction of taking aspirin for heart attacks and ischaemic strokes, with the increased risk of gastrointestinal bleeding, intracranial bleeding, and hemorrhagic strokes. Their recommendations state that age changes the risk of the medicine, with the magnitude of the benefit of aspirin coming from starting at a younger age, while the risk of bleeding, while small, increases with age, particular for adults over 60, and can be compounded by other risk factors such as diabetes and a history of gastrointestinal bleeding. As a result, the USPSTF suggests that "people ages 40 to 59 who are at higher risk for CVD should decide with their clinician whether to start taking aspirin; people 60 or older should not start taking aspirin to prevent a first heart attack or stroke." Primary prevention guidelines from made by the American College of Cardiology and the American Heart Association state they might consider aspirin for patients aged 40–69 with a higher risk of atherosclerotic CVD, without an increased bleeding risk, while stating they would not recommend aspirin for patients aged over 70 or adults of any age with an increased bleeding risk. They state a CVD risk estimation and a risk discussion should be done before starting on aspirin, while stating aspirin should be used "infrequently in the routine primary prevention of (atherosclerotic CVD) because of lack of net benefit". As of , the European Society of Cardiology made similar recommendations; considering aspirin specifically to patients aged less than 70 at high or very high CVD risk, without any clear contraindications, on a case-by-case basis considering both ischemic risk and bleeding risk. Cancer prevention Aspirin may reduce the overall risk of both getting cancer and dying from cancer. There is substantial evidence for lowering the risk of colorectal cancer (CRC), but aspirin must be taken for at least 10–20 years to see this benefit. It may also slightly reduce the risk of endometrial cancer and prostate cancer. Some conclude the benefits are greater than the risks due to bleeding in those at average risk. Others are unclear if the benefits are greater than the risk. Given this uncertainty, the 2007 United States Preventive Services Task Force (USPSTF) guidelines on this topic recommended against the use of aspirin for prevention of CRC in people with average risk. Nine years later however, the USPSTF issued a grade B recommendation for the use of low-dose aspirin (75 to 100mg/day) "for the primary prevention of CVD [cardiovascular disease] and CRC in adults 50 to 59 years of age who have a 10% or greater 10-year CVD risk, are not at increased risk for bleeding, have a life expectancy of at least 10 years, and are willing to take low-dose aspirin daily for at least 10 years". A meta-analysis through 2019 said that there was an association between taking aspirin and lower risk of cancer of the colorectum, esophagus, and stomach. In 2021, the U.S. Preventive services Task Force raised questions about the use of aspirin in cancer prevention. It notes the results of the 2018 ASPREE (Aspirin in Reducing Events in the Elderly) Trial, in which the risk of cancer-related death was higher in the aspirin-treated group than in the placebo group. Psychiatry Bipolar disorder Aspirin, along with several other agents with anti-inflammatory properties, has been repurposed as an add-on treatment for depressive episodes in subjects with bipolar disorder in light of the possible role of inflammation in the pathogenesis of severe mental disorders. A 2022 systematic review concluded that aspirin exposure reduced the risk of depression in a pooled cohort of three studies (HR 0.624, 95% CI: 0.0503, 1.198, P=0.033). However, further high-quality, longer-duration, double-blind randomized controlled trials (RCTs) are needed to determine whether aspirin is an effective add-on treatment for bipolar depression. Thus, notwithstanding the biological rationale, the clinical perspectives of aspirin and anti-inflammatory agents in the treatment of bipolar depression remain uncertain. Dementia Although cohort and longitudinal studies have shown low-dose aspirin has a greater likelihood of reducing the incidence of dementia, numerous randomized controlled trials have not validated this. Schizophrenia Some researchers have speculated the anti-inflammatory effects of aspirin may be beneficial for schizophrenia. Small trials have been conducted but evidence remains lacking. Other uses Aspirin is a first-line treatment for the fever and joint-pain symptoms of acute rheumatic fever. The therapy often lasts for one to two weeks, and is rarely indicated for longer periods. After fever and pain have subsided, the aspirin is no longer necessary, since it does not decrease the incidence of heart complications and residual rheumatic heart disease. Naproxen has been shown to be as effective as aspirin and less toxic, but due to the limited clinical experience, naproxen is recommended only as a second-line treatment. Along with rheumatic fever, Kawasaki disease remains one of the few indications for aspirin use in children in spite of a lack of high quality evidence for its effectiveness. Low-dose aspirin supplementation has moderate benefits when used for prevention of pre-eclampsia. This benefit is greater when started in early pregnancy. Aspirin has also demonstrated anti-tumoral effects, via inhibition of the PTTG1 gene, which is often overexpressed in tumors. Resistance For some people, aspirin does not have as strong an effect on platelets as for others, an effect known as aspirin-resistance or insensitivity. One study has suggested women are more likely to be resistant than men, and a different, aggregate study of 2,930 people found 28% were resistant. A study in 100 Italian people found, of the apparent 31% aspirin-resistant subjects, only 5% were truly resistant, and the others were noncompliant. Another study of 400 healthy volunteers found no subjects who were truly resistant, but some had "pseudoresistance, reflecting delayed and reduced drug absorption". Meta-analysis and systematic reviews have concluded that laboratory confirmed aspirin resistance confers increased rates of poorer outcomes in cardiovascular and neurovascular diseases. Although the majority of research conducted has surrounded cardiovascular and neurovascular, there is emerging research into the risk of aspirin resistance after orthopaedic surgery where aspirin is used for venous thromboembolism prophylaxis. Aspirin resistance in orthopaedic surgery, specifically after total hip and knee arthroplasties, is of interest as risk factors for aspirin resistance are also risk factors for venous thromboembolisms and osteoarthritis; the sequalae of requiring a total hip or knee arthroplasty. Some of these risk factors include obesity, advancing age, diabetes mellitus, dyslipidaemia and inflammatory diseases. Dosages Adult aspirin tablets are produced in standardised sizes, which vary slightly from country to country, for example 300mg in Britain and 325mg in the United States. Smaller doses are based on these standards, e.g., 75mg and 81mg tablets. The 81 mg tablets are commonly called "baby aspirin" or "baby-strength", because they were originallybut no longerintended to be administered to infants and children. No medical significance occurs due to the slight difference in dosage between the 75mg and the 81mg tablets. The dose required for benefit appears to depend on a person's weight. For those weighing less than , low dose is effective for preventing cardiovascular disease; for patients above this weight, higher doses are required. In general, for adults, doses are taken four times a day for fever or arthritis, with doses near the maximal daily dose used historically for the treatment of rheumatic fever. For the prevention of myocardial infarction (MI) in someone with documented or suspected coronary artery disease, much lower doses are taken once daily. March 2009 recommendations from the USPSTF on the use of aspirin for the primary prevention of coronary heart disease encourage men aged 45–79 and women aged 55–79 to use aspirin when the potential benefit of a reduction in MI for men or stroke for women outweighs the potential harm of an increase in gastrointestinal hemorrhage. The WHI study of postmenopausal women found that aspirin resulted in a 25% lower risk of death from cardiovascular disease and a 14% lower risk of death from any cause, though there was no significant difference between 81mg and 325mg aspirin doses. The 2021 ADAPTABLE study also showed no significant difference in cardiovascular events or major bleeding between 81mg and 325mg doses of aspirin in patients (both men and women) with established cardiovascular disease. Low-dose aspirin use was also associated with a trend toward lower risk of cardiovascular events, and lower aspirin doses (75 or 81mg/day) may optimize efficacy and safety for people requiring aspirin for long-term prevention. In children with Kawasaki disease, aspirin is taken at dosages based on body weight, initially four times a day for up to two weeks and then at a lower dose once daily for a further six to eight weeks. Adverse effects In October 2020, the US Food and Drug Administration (FDA) required the drug label to be updated for all nonsteroidal anti-inflammatory medications to describe the risk of kidney problems in unborn babies that result in low amniotic fluid. They recommend avoiding NSAIDs in pregnant women at 20 weeks or later in pregnancy. One exception to the recommendation is the use of low-dose 81mg aspirin at any point in pregnancy under the direction of a health care professional. Contraindications Aspirin should not be taken by people who are allergic to ibuprofen or naproxen, or who have salicylate intolerance or a more generalized drug intolerance to NSAIDs, and caution should be exercised in those with asthma or NSAID-precipitated bronchospasm. Owing to its effect on the stomach lining, manufacturers recommend people with peptic ulcers, mild diabetes, or gastritis seek medical advice before using aspirin. Even if none of these conditions is present, the risk of stomach bleeding is still increased when aspirin is taken with alcohol or warfarin. People with hemophilia or other bleeding tendencies should not take aspirin or other salicylates. Aspirin is known to cause hemolytic anemia in people who have the genetic disease glucose-6-phosphate dehydrogenase deficiency, particularly in large doses and depending on the severity of the disease. Use of aspirin during dengue fever is not recommended owing to increased bleeding tendency. Aspirin taken at doses of ≤325 mg and ≤100 mg per day for ≥2 days can increase the odds of suffering a gout attack by 81% and 91% respectively. This effect may potentially be worsened by high purine diets, diuretics, and kidney disease, but is eliminated by the urate lowering drug allopurinol. Daily low dose aspirin does not appear to worsen kidney function. Aspirin may reduce cardiovascular risk in those without established cardiovascular disease in people with moderate CKD, without significantly increasing the risk of bleeding. Aspirin should not be given to children or adolescents under the age of 16 to control cold or influenza symptoms, as this has been linked with Reye's syndrome. Gastrointestinal Aspirin use has been shown to increase the risk of gastrointestinal bleeding. Although some enteric-coated formulations of aspirin are advertised as being "gentle to the stomach", in one study, enteric coating did not seem to reduce this risk; the Mayo Clinic agree with this, and report that coated aspirin may also not be as effective at reducing blood clot risk. Although enteric coated aspirin is said to be not as effective as plain aspirin in reducing blood clot risk, however, with the current available results from clinical studies, there is still insufficient data to support this statement. Larger studies are required to provide more accurate results and conclusions. Combining aspirin with other NSAIDs has been shown to further increase the risk of gastrointestinal bleeding. Using aspirin in combination with clopidogrel or warfarin also increases the risk of upper gastrointestinal bleeding. Blockade of COX-1 by aspirin apparently results in the upregulation of COX-2 as part of a gastric defense. Several trials suggest that the simultaneous use of a COX-2 inhibitor with aspirin may increase the risk of gastrointestinal injury. However, currently available evidence has been unable to prove that this effect is consistently repeatable in everyday clinical practice. More dedicated research is required to provide greater clarity on the subject. Therefore, caution should be exercised if combining aspirin with any "natural" supplements with COX-2-inhibiting properties, such as garlic extracts, curcumin, bilberry, pine bark, ginkgo, fish oil, resveratrol, genistein, quercetin, resorcinol, and others. "Buffering" is an additional method that is used with the intention of mitigating gastrointestinal bleeding. Buffering agents are intended to work by preventing the aspirin from concentrating in the walls of the stomach, although the benefits of buffered aspirin are disputed. Almost any buffering agent used in antacids can be used; Bufferin, for example, uses magnesium oxide. Other preparations use calcium carbonate. Gas-forming agents in effervescent tablet and powder formulations can also double as a buffering agent, one example being sodium bicarbonate, used in Alka-Seltzer. Taking vitamin C with aspirin has been investigated as a method of protecting the stomach lining. In trials vitamin C-releasing aspirin (ASA-VitC) or a buffered aspirin formulation containing vitamin C was found to cause less stomach damage than aspirin alone. Retinal vein occlusion It is a widespread habit among eye specialists (ophthalmologists) to prescribe aspirin as an add-on medication for patients with retinal vein occlusion (RVO), such as central retinal vein occlusion (CRVO) and branch retinal vein occlusion (BRVO). The reason of this widespread use is the evidence of its proven effectiveness in major systemic venous thrombotic disorders, and it has been assumed that may be similarly beneficial in various types of retinal vein occlusion. However, a large-scale investigation based on data of nearly 700 patients showed "that aspirin or other antiplatelet aggregating agents or anticoagulants adversely influence the visual outcome in patients with CRVO and hemi-CRVO, without any evidence of protective or beneficial effect". Several expert groups, including the Royal College of Ophthalmologists, recommended against the use of antithrombotic drugs (incl. aspirin) for patients with RVO. Central effects Large doses of salicylate, a metabolite of aspirin, cause temporary tinnitus (ringing in the ears) based on experiments in rats, via the action on arachidonic acid and NMDA receptors cascade. Reye's syndrome Reye's syndrome, a rare but severe illness characterized by acute encephalopathy and fatty liver, can occur when children or adolescents are given aspirin for a fever or other illness or infection. From 1981 to 1997, 1207 cases of Reye's syndrome in people younger than 18 were reported to the US Centers for Disease Control and Prevention (CDC). Of these, 93% reported being ill in the three weeks preceding the onset of Reye's syndrome, most commonly with a respiratory infection, chickenpox, or diarrhea. Salicylates were detectable in 81.9% of children for whom test results were reported. After the association between Reye's syndrome and aspirin was reported, and safety measures to prevent it (including a Surgeon General's warning, and changes to the labeling of aspirin-containing drugs) were implemented, aspirin taken by children declined considerably in the United States, as did the number of reported cases of Reye's syndrome; a similar decline was found in the United Kingdom after warnings against pediatric aspirin use were issued. The US Food and Drug Administration recommends aspirin (or aspirin-containing products) should not be given to anyone under the age of 12 who has a fever, and the UK National Health Service recommends children who are under 16 years of age should not take aspirin, unless it is on the advice of a doctor. Skin For a small number of people, taking aspirin can result in symptoms including hives, swelling, and headache. Aspirin can exacerbate symptoms among those with chronic hives, or create acute symptoms of hives. These responses can be due to allergic reactions to aspirin, or more often due to its effect of inhibiting the COX-1 enzyme. Skin reactions may also tie to systemic contraindications, seen with NSAID-precipitated bronchospasm, or those with atopy. Aspirin and other NSAIDs, such as ibuprofen, may delay the healing of skin wounds. Earlier findings from two small, low-quality trials suggested a benefit with aspirin (alongside compression therapy) on venous leg ulcer healing time and leg ulcer size, however larger, more recent studies of higher quality have been unable to corroborate these outcomes. As such, further research is required to clarify the role of aspirin in this context. Other adverse effects Aspirin can induce swelling of skin tissues in some people. In one study, angioedema appeared one to six hours after ingesting aspirin in some of the people. However, when the aspirin was taken alone, it did not cause angioedema in these people; the aspirin had been taken in combination with another NSAID-induced drug when angioedema appeared. Aspirin causes an increased risk of cerebral microbleeds having the appearance on MRI scans of 5 to 10mm or smaller, hypointense (dark holes) patches. A study of a group with a mean dosage of aspirin of 270mg per day estimated an average absolute risk increase in intracerebral hemorrhage (ICH) of 12 events per 10,000 persons. In comparison, the estimated absolute risk reduction in myocardial infarction was 137 events per 10,000 persons, and a reduction of 39 events per 10,000 persons in ischemic stroke. In cases where ICH already has occurred, aspirin use results in higher mortality, with a dose of about 250mg per day resulting in a relative risk of death within three months after the ICH around 2.5 (95% confidence interval 1.3 to 4.6). Aspirin and other NSAIDs can cause abnormally high blood levels of potassium by inducing a hyporeninemic hypoaldosteronic state via inhibition of prostaglandin synthesis; however, these agents do not typically cause hyperkalemia by themselves in the setting of normal renal function and euvolemic state. Use of low-dose aspirin before a surgical procedure has been associated with an increased risk of bleeding events in some patients, however, ceasing aspirin prior to surgery has also been associated with an increase in major adverse cardiac events. An analysis of multiple studies found a three-fold increase in adverse events such as myocardial infarction in patients who ceased aspirin prior to surgery. The analysis found that the risk is dependent on the type of surgery being performed and the patient indication for aspirin use. On 9 July 2015, the US Food and Drug Administration (FDA) toughened warnings of increased heart attack and stroke risk associated with nonsteroidal anti-inflammatory drugs (NSAID). Aspirin is an NSAID but is not affected by the new warnings. Overdose Aspirin overdose can be acute or chronic. In acute poisoning, a single large dose is taken; in chronic poisoning, higher than normal doses are taken over a period of time. Acute overdose has a mortality rate of 2%. Chronic overdose is more commonly lethal, with a mortality rate of 25%; chronic overdose may be especially severe in children. Toxicity is managed with a number of potential treatments, including activated charcoal, intravenous dextrose and normal saline, sodium bicarbonate, and dialysis. The diagnosis of poisoning usually involves measurement of plasma salicylate, the active metabolite of aspirin, by automated spectrophotometric methods. Plasma salicylate levels in general range from 30 to 100mg/L after usual therapeutic doses, 50–300mg/L in people taking high doses and 700–1400mg/L following acute overdose. Salicylate is also produced as a result of exposure to bismuth subsalicylate, methyl salicylate, and sodium salicylate. Interactions Aspirin is known to interact with other drugs. For example, acetazolamide and ammonium chloride are known to enhance the intoxicating effect of salicylates, and alcohol also increases the gastrointestinal bleeding associated with these types of drugs. Aspirin is known to displace a number of drugs from protein-binding sites in the blood, including the antidiabetic drugs tolbutamide and chlorpropamide, warfarin, methotrexate, phenytoin, probenecid, valproic acid (as well as interfering with beta oxidation, an important part of valproate metabolism), and other NSAIDs. Corticosteroids may also reduce the concentration of aspirin. Other NSAIDs, such as ibuprofen and naproxen, may reduce the antiplatelet effect of aspirin. Although limited evidence suggests this may not result in a reduced cardioprotective effect of aspirin. Analgesic doses of aspirin decrease sodium loss induced by spironolactone in the urine, however this does not reduce the antihypertensive effects of spironolactone. Furthermore, antiplatelet doses of aspirin are deemed too small to produce an interaction with spironolactone. Aspirin is known to compete with penicillin G for renal tubular secretion. Aspirin may also inhibit the absorption of vitamin C. Research The ISIS-2 trial demonstrated that aspirin at doses of 160mg daily for one month, decreased the mortality by 21% of participants with a suspected myocardial infarction in the first five weeks. A single daily dose of 324mg of aspirin for 12 weeks has a highly protective effect against acute myocardial infarction and death in men with unstable angina. Bipolar disorder Aspirin has been repurposed as an add-on treatment for depressive episodes in subjects with bipolar disorder. However, meta-analytic evidence is based on very few studies and does not suggest any efficacy of aspirin in the treatment of bipolar depression. Thus, notwithstanding the biological rationale, the clinical perspectives of aspirin and anti-inflammatory agents in the treatment of bipolar depression remain uncertain. Infectious diseases Several studies investigated the anti-infective properties of aspirin for bacterial, viral and parasitic infections. Aspirin was demonstrated to limit platelet activation induced by Staphylococcus aureus and Enterococcus faecalis and to reduce streptococcal adhesion to heart valves. In patients with tuberculous meningitis, the addition of aspirin reduced the risk of new cerebral infarction [RR = 0.52 (0.29-0.92)]. A role of aspirin on bacterial and fungal biofilm is also being supported by growing evidence. Cancer prevention Evidence from observational studies were conflicting on the effect of aspirin in breast cancer prevention, a randomized controlled trial showed that aspirin had no significant effect in reducing breast cancer thus further studies are needed to clarify aspirin effect in cancer prevention. In gardening There are a many anecdotal reportings that aspirin can improve plant's growth and resistance though most research involved salicylic acid instead of aspirin. Veterinary medicine Aspirin is sometimes used in veterinary medicine as an anticoagulant or to relieve pain associated with musculoskeletal inflammation or osteoarthritis. Aspirin should only be given to animals under the direct supervision of a veterinarian, as adverse effects—including gastrointestinal issues—are common. An aspirin overdose in any species may result in salicylate poisoning, characterized by hemorrhaging, seizures, coma, and even death. Dogs are better able to tolerate aspirin than cats are. Cats metabolize aspirin slowly because they lack the glucuronide conjugates that aid in the excretion of aspirin, making it potentially toxic if dosing is not spaced out properly. No clinical signs of toxicosis occurred when cats were given 25mg/kg of aspirin every 48 hours for 4 weeks, but the recommended dose for relief of pain and fever and for treating blood clotting diseases in cats is 10mg/kg every 48 hours to allow for metabolization. See also Fluoroaspirin References Further reading External links 1897 in Germany 1897 in science Acetate esters Acetylsalicylic acids Antiplatelet drugs Bayer brands Brands that became generic Chemical substances for emergency medicine Commercialization of traditional medicines Covalent inhibitors Equine medications German inventions Hepatotoxins Nonsteroidal anti-inflammatory drugs Salicylic acids Salicylyl esters World Health Organization essential medicines Wikipedia medicine articles ready to translate	11
The Ainu are an ethnic group of related indigenous people native to Northern Japan, as well as the land surrounding the Sea of Okhotsk, including Hokkaido Island, Northeast Honshu Island, Sakhalin Island, the Kuril Islands, the Kamchatka Peninsula, and the Khabarovsk Krai; they have occupied these areas since before the arrival of the modern Japanese and Russians. These regions are often referred to as in historical Japanese texts. Official estimates place the total Ainu population of Japan at 25,000. Unofficial estimates place the total population at 200,000 or higher, as the near-total assimilation of the Ainu into Japanese society has resulted in many individuals of Ainu descent having no knowledge of their ancestry. The Ainu are one of the only major ethnic minorities in the Japanese islands with a distinct and highly unique culture and way of life. They were subject to forced assimilation, colonization, and ethnic and cultural genocide by the larger Japanese populace since at least the 18th century. Japanese assimilation policies in the 19th century around the Meiji Restoration included forcing Ainu peoples off their land; this, in turn, forced them to give up traditional ways of life such as subsistence hunting and fishing. Ainu people were not allowed to practice their religion, and they were pushed into Japanese-language schools where speaking the Ainu language was strictly forbidden. In 1966, there were about 300 native Ainu speakers; in 2008, however, there were only about 100. Names This people's most widely known ethnonym, "Ainu" (; ; ) means "human" in the Ainu language, particularly as opposed to , divine beings. Ainu also identify themselves as "Utari" ("comrade" or "people"). Official documents use both names. History Pre-modern The Ainu are the native people of Hokkaido, Sakhalin, and the Kurils. Early Ainu-speaking groups (mostly hunters and fishermen) also migrated into the Kamchatka Peninsula and into Honshu, where their descendants are today known as the Matagi hunters, who still use a large amount of Ainu vocabulary in their dialect. Ainu toponyms people also live in several places throughout northern Honshu, mostly along the western coast and in the Tōhoku region. This serves as further evidence for Ainu-speaking hunters and fishermen migrating down from Northern Hokkaido into Honshu. There is also evidence that Ainu speakers lived in the Amur region through Ainu loanwords found in the Uilta and Ulch people languages. Research suggests that Ainu culture originated from a merger of the Okhotsk and Satsumon cultures. According to researchers Lee and Hasegawa, Ainu-speakers descend from the Okhotsk people, who rapidly expanded from northern Hokkaido into the Kurils and Honshu. These early inhabitants did not speak the Japanese language; some were conquered by the Japanese early in the 9th century. In 1264, the Ainu invaded the land of the Nivkh people. The Ainu also started an expedition into the Amur region, which was then controlled by the Yuan dynasty, resulting in reprisals by the Mongols who invaded Sakhalin. Active contact between the Wa-jin (the ethnically Japanese, also known as Yamato-jin) and the Ainu of Ezogashima (now known as Hokkaidō) began in the 13th century. The Ainu formed a society of hunter-gatherers, surviving mainly by hunting and fishing. They followed a religion which was based on natural phenomena. During the Muromachi period (1336–1573), many Ainu were subject to Japanese rule. Disputes between the Japanese and Ainu developed into large-scale violence, known as Koshamain's Revolt, in 1456. Takeda Nobuhiro, the ancestor of the Matsumae clan, killed the Ainu leader Koshamain. In the 15th century, Manchuria in northern China came under Ming rule. As part of the Nurgan Regional Military Commission, the Ainu and Nivkh peoples of Sakhalin were subjugated and became tributaries to the Ming dynasty. Women in Sakhalin intermarried with Han Chinese Ming officials when the Ming took tribute from Sakhalin and the Amur river region. Due to Ming rule in Manchuria, Chinese cultural and religious influence such as Chinese New Year, the "Chinese god", and motifs such as dragons, spirals, and scrolls, spread among the Ainu, Nivkh, and Amur natives such as the Udeghes, Ulchis, and Nanais. These groups also adopted material goods and practices such as agriculture, husbandry, heating, iron cooking pots, silk, and cotton. During the Edo period (1601–1868), the Ainu, who controlled northern Hokkaido, became increasingly involved in trade with the Japanese, who controlled the southern portion of the island. The Tokugawa bakufu (feudal government) granted the Matsumae clan exclusive rights to trade with the Ainu in the northern part of the island. Later, the Matsumae began to lease out trading rights to Japanese merchants, and contact between Japanese and Ainu became more extensive. Throughout this period, Ainu groups competed with each other to import goods from the Japanese, and epidemic diseases such as smallpox reduced the population. Although the increased contact created by the trade between the Japanese and the Ainu contributed to greater mutual understanding, it also sometimes led to conflict, which occasionally intensified into violent Ainu revolts. The most important Ainu rebellion against Japanese authority was Shakushain's Revolt from 1669–1672. Another large-scale revolt by Ainu against Japanese rule was the Menashi-Kunashir Battle in 1789. However, throughout this period and thereafter, the Ainu-Japanese relationship continued to be marked more by trade and commercial interactions than by conflicts. From 1799 to 1806, the Tokugawa shogunate took direct control of southern Hokkaido. During this period, Ainu women were separated from their husbands and either subjected to rape or forcibly married to Japanese men. Meanwhile, Ainu men were deported to merchant subcontractors for five- and ten-year terms of service. Policies of family separation and assimilation, combined with the impact of smallpox, caused the Ainu population to drop significantly in the early 19th century. In the 18th century, there were 80,000 Ainu, but by 1868, there were only about 15,000 Ainu in Hokkaido, 2,000 in Sakhalin, and around 100 in the Kuril islands. Despite their growing influence in the area in the early 19th century as a result of these policies, the Tokugawa shogunate was unable to gain a monopoly on Ainu trade with those on the Asian mainland, even by the year 1853. Santan traders, a group comprised mostly of the Ulchi, Nanai, and Oroch peoples of the Amur River, commonly interacted with the Ainu people independent of the Japanese government, especially in the north part of Hokkaido. In addition to their trading ventures, Santan traders sometimes kidnapped or purchased Ainu women from Rishiri to become their wives. This further escalated Japan's presence in the area, as the Tokugawa shogunate believed a monopoly on Santan trade would better protect the Ainu people. Contrary to popular belief, it is now thought that the Ainu were not the first settlers of the island of Hokkaido. Archeological evidence suggests that ancient Japanese Jomon people inhabited Hokkaido early on, and the Ainu people may have only appeared after the 13th century. They likely migrated from more northern islands and what is now Far East Russia. Japanese annexation of Hokkaido In 1869, the imperial government established the Hokkaidō Development Commission as part of the Meiji Restoration. Researcher Katarina Sjöberg quotes Baba's 1890 account of the Japanese government's reasoning: ... The development of Japan's large northern island had several objectives: First, it was seen as a means to defend Japan from a rapidly developing and expansionist Russia. Second ... it offered a solution to the unemployment for the former samurai class ... Finally, development promised to yield the needed natural resources for a growing capitalist economy. As a result of the Treaty of Saint Petersburg (1875), the Kuril Islandsalong with their Ainu inhabitantscame under Japanese administration. In 1899, the Japanese government passed an act labelling the Ainu as "former aborigines", with the idea that they would assimilate. This resulted in the Japanese government taking the land where the Ainu people lived and placing it from then on under Japanese control. Also at this time, the Ainu were granted automatic Japanese citizenship, effectively denying them the status of an indigenous group. The Ainu went from being a relatively isolated group of people to having their land, language, religion and customs assimilated into those of the Japanese. Their land was distributed to the Yamato Japanese settlers to create and maintain farms in the model of Western industrial agriculture. It was known as "colonization" (拓殖) at the time, but later by the euphemism, "opening up undeveloped land" (). Additionally, factories like flour mills and beer breweries, along with mining practices, resulted in the creation of infrastructure such as roads and railway lines during a development period that lasted until 1904. During this time, the Ainu were ordered to cease religious practices such as animal sacrifice and the custom of tattooing. The same act applied to the native Ainu on Sakhalin after its annexation as the Karafuto Prefecture. Assimilation after annexation The Ainu have historically suffered from economic and social discrimination, as both the Japanese government and mainstream population regarded them as dirty and primitive barbarians. The majority of Ainu were forced to be petty laborers during the Meiji Restoration, which saw the introduction of Hokkaido into the Japanese Empire and the privatization of traditional Ainu lands. During the 19th and 20th centuries, the Japanese government denied the rights of the Ainu to their traditional cultural practices such as hunting, gathering, and speaking their native language. The legal denial of Ainu cultural practices mostly stemmed from the 1899 Hokkaido Former Aborigines Protection Act. This law and its associated policies were designed to fully integrate the Ainu into Japanese society while erasing Ainu culture and identity. The Ainu's position as manual laborers and their forced integration into larger Japanese society have led to discriminatory practices by the Japanese government that can still be felt today. Intermarriage between Japanese and Ainu was actively promoted by the Ainu to lessen the chances of discrimination against their offspring. As a result, many Ainu today are indistinguishable from their Japanese neighbors, but some Ainu-Japanese are interested in traditional Ainu culture. For example, Oki, born as a child of an Ainu father and a Japanese mother, became a musician who plays the traditional Ainu instrument . There are also many small towns in the southeastern or Hidaka region of Hokkaido where ethnic Ainu live, such as in Nibutani (). From the early 1870s, Christian missionary work was conducted amongst the Ainu. The Anglican Communion missionaries included the Rt Rev Philip Fyson, Bishop of Hokkaido, and the Rev John Batchelor. Batchelor wrote extensively in English about the beliefs and daily life of the Ainu in Yezo (or Ezo), and his publications are a source of photographs of the Japanese and Ainu close to the missions. Standard of living The discrimination and negative stereotypes assigned to the Ainu have manifested in lower levels of education, income, and participation in the economy as compared to their ethnically Japanese counterparts. The Ainu community in Hokkaido in 1993 received welfare payments at a 2.3 times higher ratethan that of Hokkaido as a whole. They also had an 8.9% lower enrollment rate from junior high school to high school and a 15.7% lower enrollment into college from high school. Due to this noticeable and growing gap, the Japanese government has been lobbied by activists to research the Ainu's standard of living nationwide. The Japanese government will provide ¥7 million (US$63,000), beginning in 2015, to conduct surveys nationwide on this matter. The Ainu and ethnic homogeneity in Japan The existence of the Ainu has challenged the notion of ethnic homogeneity in post-WWII Japan. After the demise of the multi-ethnic Empire of Japan in 1945, successive governments forged a single Japanese identity by advocating monoculturalism and denying the existence of more than one ethnic group in Japan. Following the United Nations Declaration on the Rights of Indigenous Peoples in 2007, Hokkaido politicians pressured the government to recognize Ainu rights. Prime Minister Fukuda Yasuo answered a parliamentary question on May 20, 2008 by stating,It is a historical fact that the Ainu are the precursors in the northern Japanese archipelago, in particular Hokkaido. The government acknowledges the Ainu to be an ethnic minority as it has maintained a unique cultural identity and having a unique language and religion.On June 6, 2008, the National Diet of Japan passed a non-binding, bipartisan resolution calling upon the government to recognize the Ainu as indigenous people. In 2019, eleven years after this resolution, the Diet finally passed an act recognizing the Ainu as an indigenous people of Japan. Despite this recognition of the Ainu as an ethnically distinct group, political figures in Japan continue to define ethnic homogeneity as key to overall Japanese national identity. For example, politician Tarō Asō notably claimed in 2020, “No other country but this one has lasted for as long as 2,000 years with one language, one ethnic group and one dynasty”. Origins The Ainu have often been thought to descend from the diverse Jōmon people who lived in northern Japan from the Jōmon period ( 14,000 to 300 BCE). One of their , or legends, tells that, "[T]he Ainu lived in this place a hundred thousand years before the Children of the Sun came". Recent research suggests that the historical Ainu culture originated from a merger of the Okhotsk culture with the Satsumon culture, thought to have derived from the diverse Jōmon-period cultures of the Japanese archipelago. The historical Ainu economy was based on farming, as well as on hunting, fishing, and gathering. According to researchers Lee and Hasegawa of Waseda University, the direct ancestors of the later Ainu people formed during the late Jōmon period from the combination of the local but diverse population of Hokkaido, long before the arrival of contemporary Yamato Japanese people. Lee and Hasegawa suggest that the Ainu language expanded from northern Hokkaido and may have originated from a relatively more recent Northeast Asian/Okhotsk population, who established themselves in northern Hokkaido and had a significant impact on the formation of Hokkaido's Jōmon culture. Linguist and historian Joran Smale similarly found that the Ainu language likely originated from the ancient Okhotsk people, which had strong cultural influence on the "Epi-Jōmon" of southern Hokkaido and northern Honshu, but that the Ainu people themselves formed from the combination of both ancient groups. Additionally, he notes that the historical distribution of Ainu dialects and their specific vocabulary correspond to the distribution of the maritime Okhotsk culture. A 2021 study confirmed that the Hokkaido Jōmon population formed from "Terminal Upper-Paleolithic people" (TUP people) indigenous to Northern Eurasia and from proper Jōmon people, who arrived from Honshu about 15,000 BCE. The Ainu, in turn, originated from the Hokkaido Epi-Jōmon and from the Okhotsk people in Hokkaido. Another study in 2021 analyzed the indigenous populations of northern Japan and the Russian Far East. They concluded that Siberia and northern Japan were populated by two distinct waves: Confusion with Emishi The claim that the ancient Emishi were Ainu has been largely disproved by current research, although it is still under dispute. The term "Emishi" in the Nara period (710-794) referred to people who lived in the Tohoku region and whose lifestyle and culture differed markedly from that of the Yamato people; it was originally a highly cultural and political concept with no racial distinction. From the mid-Heian period onward, Emishi who did not fall under the governance of the Yamato Kingship were singled out as northern Emishi. They began to be referred to as "Ezo" (Emishi). The first written reference to "Ezo," which is thought to be Ainu, can be found in Suwa Daimyōjin Ekotoba, which was written in 1356. Indeed, Ainu have lived in Sakhalin, the Kuril Islands, Hokkaido, and the northern Tohoku region since the 13th century. Thus, "Ezo = Ainu" is a concept that was accepted in the medieval and early modern periods, and it is not accurate to apply it to ancient Emishi as well. Caucasoid Theory Source: The Ainu Caucasian theory was proposed by Siebold, a physician and naturalist at the Dutch trading post in Nagasaki in the 19th century; he claimed that the Ainu were Caucasian (Caucasoid) and that the Ainu were a long-lost white people. Early European Ainu researchers considered the Ainu to be Caucasian because they were an ancient culture and based their lives on a lifestyle that could be compared to the Paleolithic period in Europe, i.e., gathering plants and hunting animals in the mountains and sea, and because their facial moats were deeper than those of the mainland Japanese. This theory was popular until the 1950s. Followers of the theory include French ethnologist Georges Montandon and P.Wilhelm Koppers of the Viennese school of historical ethnography. Genetics Paternal lineages Genetic testing has shown that the Ainu belong mainly to Y-DNA haplogroup D-M55 (D1a2) and C-M217. Y-DNA haplogroup D-M55 is found throughout the Japanese archipelago, but with very high frequencies among the Ainu of Hokkaido in the far north, and to a lesser extent among the Ryukyuans in the Ryukyu Islands of the far south. Recently it was confirmed that the Japanese branch of haplogroup D-M55 is distinct and isolated from other D-branches by more than 53,000 years. Several studies (Shinoda 2008) suggest that haplogroup D originated somewhere in Central Asia. According to Hammer et al., the ancestral haplogroup D originated between Tibet and the Altai mountains. They suggest that there were multiple migration waves into Eastern Eurasia. A 2004 study suggests that fourteen out of sixteen Ainu (or 87.5%) belong to YAP+ lineages (Y-haplogroups D-M55* and D-M125), with 13/16 (81.3%) belonging to D-M55 and 1/16 (6.25%) belonging to D-M125 (the latter is much more typical of mainland Japanese males than Ainu). The presence of haplogroup C-M217 in the Ainu suggests a degree of genetic admixture with the Nivkhs. Two out of a sample of sixteen Ainu men (or 12.5%) belong to C-M217*, which is the most common Y chromosome haplogroup among the indigenous populations of Siberia and Mongolia. Hammer et al. (2006) found that one in a sample of four (25%) Ainu men belonged to haplogroup C-M217. Maternal lineages An analysis of a sample of 51 modern Ainu showed their mtDNA lineages consist mainly of haplogroup Y ( = 21.6% according to Tanaka et al. (2004), or = 19.6% according to Adachi et al. (2009), who cite Tajima et al. (2004)), haplogroup D ( = 17.6%, particularly D4 (xD1)), haplogroup M7a ( = 15.7%), and haplogroup G1 ( = 15.7%). Other mtDNA haplogroups detected in this sample include A (), M7b2 (), N9b (), B4f (), F1b (), and M9a (). Most of the remaining individuals in this sample have been classified definitively only as belonging to macro-haplogroup M. According to Sato et al. (2009), who studied the mtDNA of the same sample of modern Ainu (=51), the major haplogroups of the Ainu are N9 ( = 27.5%, including Y and N9 (xY)), D ( = 23.5%, including D (xD5) and D5), M7 ( = 19.6%), and G ( = 19.6%, including G1 and G2); the minor haplogroups are A (), B (), F (), and M (xM7, M8, CZ, D, G) (). Studies published in 2004 and 2007 found the combined frequency of M7a and N9b observed in Jōmons, which are believed by some to be Jōmon maternal contributions, to be 28% in Okinawans ( M7a1, M7a (xM7a1), N9b), 17.6% in Ainu ( M7a (xM7a1), N9b), and from 10% ( M7a (xM7a1), M7a1, N9b) to 17% ( M7a1, M7a (xM7a1)) in mainstream Japanese. In addition, haplogroups D4, D5, M7b, M9a, M10, G, A, B, and F have been found in Jōmon people as well. These mtDNA haplogroups were found in various Jōmon samples and in some modern Japanese people. A study by Kanazawa-Kiriyama et al. (2013) about mitochondrial haplogroups found that the Ainu people (including samples from Hokkaido and Tōhoku) have a high frequency of N9b, which is also found among Udege people of eastern Siberia and is more common among Europeans than Eastern Asians. The N9b haplogroup is also notably absent from geographically close Kantō Jōmon period samples, which have a higher frequency of M7a7, commonly found among East and Southeast Asians. According to the authors, these results add to the internal-diversity observed among the Jōmon period population and show that a significant percentage of the Jōmon period people had ancestry from a Northeast Asian source population; this is suggested to be the source of the proto-Ainu language and culture, which is not detected in samples from Kantō. A study by Adachi et al. 2018 concluded, Our results suggest that the Ainu were formed from the Hokkaido Jomon people, but subsequently underwent considerable admixture with adjacent populations. The present study strongly recommends revision of the widely accepted dual-structure model for the population history of the Japanese, in which the Ainu are assumed to be the direct descendants of the Jomon people. Autosomal DNA A 2004 reevaluation of cranial traits suggests that the Ainu resemble the Okhotsk more than they do the Jōmon, though there are large variations. This agrees with the hypothesis of Ainu as a merger of Okhotsk and Satsumon populations, referenced earlier. Similarly, more recent studies link the Ainu to the local Hokkaido Jōmon period samples, such as the 3,800 year old Rebun sample. Genetic analyses of HLA I and HLA II genes as well as HLA-A, B, and DRB1 gene frequencies link the Ainu to indigenous peoples of the Americas. The genetics of a variety of Asian groups show Ainu and Native Americans can both be traced back to Paleolithic groups in Siberia. Hideo Matsumoto (2009) suggested, based on immunoglobulin analyses, that the Ainu (and Jōmon) have a Siberian origin. Compared with other East Asian populations, the Ainu have the highest amount of Siberian immunoglobulin components, higher than mainland Japanese people. A 2012 genetic study revealed that the closest known genetic relatives of the Ainu are the Ryukyuan people, followed by the Yamato people and Nivkh. A genetic analysis in 2016 showed that although the Ainu have some genetic relations to Yamato Japanese people and Eastern Siberians (especially Itelmens and Chukchis), they are not directly related to any modern ethnic group. Further, the study detected genetic contributions from the Ainu to populations around the Sea of Okhotsk, but no genetic influence on the Ainu themselves. According to the study, the Ainu-like genetic contribution in the Ulch people is about 17.8% or 13.5%, and about 27.2% in the Nivkhs. The study also disproved the idea of a relation to Andamanese or Tibetans. Instead, it presented evidence of gene flow between the Ainu and "lowland East Asian farmer populations" (represented in the study by the Ami and Atayal in Taiwan and the Dai and Lahu in Mainland East Asia). A genetic study in 2016 of historical Ainu samples from southern Sakhalin (8) and northern Hokkaido (4) found that the samples were closely related to the ancient Okhotsk people followed by Ainu samples from southern Hokkaido, pointing to some substructure among the ancient Ainu population. Recent autosomal evidence suggests that the Ainu derive a majority of their ancestry from the local Jōmon period people of Hokkaido. A 2019 study by Gakuhari et al., analyzing ancient Jōmon remains, found about 79.3% Hokkaido Jōmon ancestry in the Ainu. Another 2019 study, by Kanazawa-Kiriyama et al., found about 66% Hokkaido Jōmon ancestry. A genetic study in 2021, by Sato et al., found that the Ainu probably derived about ~49% of their ancestry from the local Hokkaido Jōmon, ~22% from the Okhotsk (represented by Chukotko-Kamchatkan peoples), and ~29% from the Yamato Japanese. Population genomic data from various Jōmon period samples show that their main ancestry component split from other East Asian people at about 15,000 BCE. Following their migration into the Japanese archipelago, they became largely isolated from outside geneflow. However, geneflow from Ancient North Eurasians towards the Jōmon period population was detected along a North to South cline, with a peak among Hokkaido Jōmon. Physical description Physical differences can be observed between various Ainu subgroups and clans. According to anthropologist Emiko Ohnuki-Tierney, …features considered to distinguish the Ainu from other populations in the area, especially the Japanese, are the tendency to dolichocephaly (long-headedness), a well developed glabella, a deeply depressed nose root, widely projecting cheekbones, a comparatively massive mandible (lower jaw), and an edge to edge bite,as well as more body and facial hair. Many Ainu men have abundant wavy hair and often wear long beards. The book Ainu Life and Legends by author Kyōsuke Kindaichi (published by the Japanese Tourist Board in 1942) contains a physical description of Ainu: Many have wavy hair, but some straight black hair. Very few of them have wavy brownish hair. Their skins are generally reported to be light brown. But this is due to the fact that they labor on the sea and in briny winds all day. Old people who have long desisted from their outdoor work are often found to be as white as western men. The Ainu have broad faces, beetling eyebrows, and sometimes large sunken eyes, which are generally horizontal and of the so-called European type. Eyes of the Mongolian type are rare but occasionally found among them. A comparative study by Brace et al. (2001) argues for a closer morphological relation of the Ainu with prehistoric and living European groups, compared with other East Asian groups. The authors concluded that some of their ancestors may have descended from a population, dubbed "Eurasians" by the authors, that moved into northern Eurasia and eastwards in the Late Pleistocene, significantly predating the expansion of the modern core population of East Asia from Mainland Southeast Asia. Overall anthropometric characteristics and cranial features group the Ainu people most closely together with Native Americans, especially Eskimos, followed by other East Asians, rather than with Europeans. A study by Kura et al. (2014) based on cranial and genetic characteristics suggests a mostly Northern Asian ("Arctic") origin for Ainu people. Thus, despite the Ainu sharing certain morphological similarities with Caucasoid populations, the Ainu are essentially of North Asiatic origin. Genetic evidence support a closer relation to Paleo-Siberian Arctic populations, such as the Chukchi people. A study by Omoto has shown that the Ainu are more closely related to other East Asian groups (previously mentioned as "Mongoloid") than to Western Eurasian groups (formerly termed "Caucasian"), on the basis of fingerprints and dental morphology. A study by Jinam et al. (2015), using genome-wide SNP data comparison, found that some Ainu carry two specific gene alleles associated with facial features commonly found among Europeans but generally absent among Japanese people and other East Asians. Military service Russo-Japanese War Ainu men were first recruited into the Japanese military in 1898. Sixty-four Ainu served in the Russo-Japanese War (1904–1905), eight of whom died in battle or from illness contracted during military service. Two received the Order of the Golden Kite, granted for bravery, leadership or command in battle. Second World War During World War II, Australian troops engaged in the hard-fought Kokoda Track campaign (July–November 1942) in New Guinea were surprised by the physique and fighting prowess of the first Japanese troops they encountered. One medical officer recounted, Language In 2008, the news block WorldWatch gave an estimate of fewer than 100 remaining speakers of the Ainu language. In 1993, linguist Alexander Vovin placed the number at fewer than 15 speakers, characterising the language as "almost extinct". Because so few present-day speakers are left, study of the Ainu language is limited and is based largely on historical research. Historically, the status of the Ainu language was rather high and was used by early Russian and Japanese administrative officials to communicate with each other and with the Ainu people. Despite the small number of native speakers of Ainu, there is an active movement to revitalize the language, mainly in Hokkaido but also elsewhere, such as in Kanto. Ainu oral literature has been documented both in hopes of safeguarding it for future generations and for using it as a teaching tool for language learners. As of 2011, there were an increasing number of second-language learners, especially in Hokkaido. The resurgence of Ainu culture and language is in large part due to the pioneering efforts of the late Ainu folklorist, activist, and former Diet member Shigeru Kayano, himself a native speaker. He first opened an Ainu language school in 1987 funded by Ainu Kyokai. Although some researchers have attempted to show that the Ainu and Japanese languages are related, modern scholars have rejected the idea that the relationship goes beyond contact, such as the mutual borrowing of words. No attempt to show a relationship with Ainu to any other language has gained wide acceptance, and linguists currently classify Ainu as a language isolate. Most Ainu people speak either Japanese or Russian. The Ainu language has no indigenous system of writing and has historically been transliterated using Japanese kana or Russian Cyrillic. , it was typically written either in katakana or in the Latin alphabet. Many of the Ainu dialects, especially those from different extremities of Hokkaido, are not mutually intelligible. However, all Ainu speakers understand the classic Ainu language of the Yukar, a form of Ainu epic. Without a writing system, the Ainu were masters of narration, with the Yukar and other forms of narration such as Uepeker (Uwepeker) tales being committed to memory and related at gatherings which often lasted many hours or even days. Concepts expressed with prepositions in English, such as to, from, by, in, and at, appear as postpositional forms in Ainu. Whereas prepositions come before the word they modify, postpositions come after it. A single sentence in Ainu can comprise many added or agglutinated sounds or affixes that represent nouns or ideas. Culture Traditional Ainu culture is quite different from Japanese culture. According to Tanaka Sakurako from the University of British Columbia, the Ainu culture can be included into a wider "northern circumpacific region", referring to various indigenous cultures of Northeast Asia and "beyond the Bering Strait" in North America. Never shaving after a certain age, the men have full beards and moustaches. Men and women alike cut their hair level with the shoulders at the sides of the head, trimmed semi-circularly behind. The women tattoo () their mouths, and sometimes their forearms. The mouth tattoos start at a young age with a small spot on the upper lip, gradually increasing with size. The soot deposited on a pot hung over a fire of birch bark is used for colour. Traditional Ainu dress consists of a robe spun from the inner bark of the elm tree, called attusi or attush. Various styles are made, which consist generally of a simple short robe with straight sleeves, folded around the body and tied with a band about the waist. The sleeves end at the wrist or forearm, and the length generally is to the calves. Women also wear an undergarment of Japanese cloth. In winter, the skins of animals are worn, with leggings of deerskin and, in Sakhalin, boots made from the skin of dogs or salmon. Ainu culture considers earrings, traditionally made from grapevines, to be gender neutral. Women also wear a beaded necklace called a tamasay. Modern craftswomen weave and embroider traditional garments that command very high prices. Traditional Ainu cuisine consists of the meat of bear, fox, wolf, badger, ox, and horse, as well as fish, fowl, millet, vegetables, herbs, and roots. They traditionally never eat raw fish or meat, always boiling or roasting it. Their traditional habitations are reed-thatched huts, the largest about square, without partitions and having a fireplace in the center. There is no chimney, only a hole at the angle of the roof. One window sits on the eastern side, along with two doors. The house of the village head is used as a public meeting place when one is needed. Another kind of traditional Ainu house is called chise. Instead of using furniture, Ainu traditionally would sit on the floor, which would be covered with two layers of mats, one of rush, the other of water flag (Iris pseudacorus), a water plant with long sword-shaped leaves. For beds, planks are spread, and mats are hung around them on poles, employing skins for coverlets. Men use chopsticks when eating, and women use wooden spoons. Ainu cuisine is not commonly eaten outside Ainu communities. Only a few restaurants in Japan serve traditional Ainu dishes, mainly in Tokyo and Hokkaido. The functions of judgeship were not entrusted to chiefs. Rather, an indefinite number of a community's members sat in judgment upon its criminals. Capital punishment did not exist, nor did the community resort to imprisonment. Beating was considered a sufficient and final penalty. However, in the case of murder, the nose and ears of the culprit were cut off, or the tendons of his feet severed. Hunting The Ainu traditionally hunt from late autumn to early summer. The reasons for this are in part because in late autumn, plant gathering, salmon fishing, and other activities of securing food come to an end, and hunters readily find game in fields and mountains in which plants withered. A village typically possesses a hunting ground of its own, or several villages use a joint hunting territory, called an iwor. Heavy penalties were imposed on any outsiders trespassing on such hunting grounds or joint hunting territory. The Ainu traditionally hunt Ussuri brown bears, Asian black bears, Ezo deer (a subspecies of sika deer), hares, red foxes, Japanese raccoon dogs, and other animals. Ezo deer are a particularly important food resource for the Ainu, as are salmon. They also hunt sea eagles, such as white-tailed sea eagles, along with ravens and other birds. The Ainu hunted eagles for their tail feathers, which they used in trade with the Japanese. The Ainu hunted with arrows and spears with poison-coated points. They obtained the poison, called surku, from the roots and stalks of aconites. The recipe for this poison was a household secret that differed from family to family. They enhanced the poison with mixtures of roots and stalks of dog's bane, boiled juice of Mekuragumo (a type of harvestman), Matsumomushi (Notonecta triguttata, a species of backswimmer), tobacco, and other ingredients. They also used stingray stingers or skin covering stingers. They traditionally hunt in groups with dogs. Before hunting, particularly for bear and similar animals, they may pray to the Kamuy-huci, the house guardian goddess, to convey their wishes for a large catch, and to the god of mountains for safe hunting. The Ainu traditionally hunt bears during the spring thaw. At that time, bears are weak because they haven't eaten during their long hibernation. Ainu hunters catch hibernating bears or bears that have just left hibernation dens. When they hunt bear in summer, they use a spring trap loaded with an arrow, called an amappo. The Ainu usually use arrows to hunt deer. Also, they drive deer into a river or sea and shoot them with arrows. For a large catch, a whole village would drive a herd of deer off a cliff and club them to death. Fishing Fishing is important to Ainu culture. They largely catch trout in summer and salmon in autumn, as well as ito (Japanese huchen), dace, and other fish. Spears called marek" were often used. Other methods were "tesh" fishing, "uray" fishing, and "rawomap" fishing. Many villages were built near rivers or along the coast. Each village or individual had a definite river fishing territory. Outsiders could not freely fish there and needed to ask the owner. Japanese lacquerware Japanese lacquerware was used in everyday life as tableware and often used in ceremonies (ritual utensils), such as the cups used to offer alcohol when praying to the kamui. Lacquerware was often treated as treasure, and it was also used as containers for storing other treasures. One of the characteristics of Ainu lacquerware is that it is almost entirely imported from the south of Honshu. Some pieces may have been lacquered in Matsumae in southern Hokkaido, but since the technique of lacquering is from Honshu, lacquerware can be considered an introduced item among Ainu folk implements. There are examples of spatulas and other objects used by the Ainu people for ceremonial purposes that remain in clusters of the same size, and some are specifically produced for trading with the Ainu. Ornaments Traditionally, Ainu men wear a crown called a sapanpe for important ceremonies. Sapanpe are made from wood fibre with bundles of partially shaved wood. The crown has wooden figures of animal gods and other ornaments on its centre. Men carry an emush (ceremonial sword) secured by an emush at strap to their shoulders. Ainu women traditionally wear matanpushi, embroidered headbands, and ninkari, metal earrings with balls. Matanpushi and ninkari were originally also worn by men. Furthermore, aprons called maidari now are a part of women's formal clothes. However, some old documents state that men wore maidari. Women sometimes wear a bracelet called a tekunkani. Women may wear a necklace called a rektunpe, a long, narrow strip of cloth with metal plaques. They may also wear a necklace that reaches the breast called a tamasay or shitoki, usually made from glass balls. Some glass balls came from trade with the Asian continent. The Ainu also obtained glass balls secretly made by the Matsumae clan. Housing A village is called a kotan in the Ainu language. Kotan were traditionally located in river basins and along seashores where food was readily available, particularly in the basins of rivers through which salmon traveled upstream. In early modern times, the Ainu people were forced to labor at Japanese fishing grounds . Ainu kotan were also forced to relocate to near fishing grounds, so that the Japanese could secure a labor force. When the Japanese moved to other fishing grounds, Ainu kotan were forced to accompany them. As a result, the traditional kotan disappeared, and large villages of several dozen families were formed around the fishing grounds. Cise or cisey (houses) in a kotan are made of cogon grass, bamboo grass, bark, etc. The length lays east to west or parallel to a river. A cise is about seven by five meters, with an entrance at the west end that also serves as a storeroom. A cise has three windows, including the rorun-puyar, a window located on the side facing the entrance (i.e., on the east side), through which gods enter and leave and ceremonial tools are taken in and out. The Ainu regard this window as sacred and are told never to look in through it. A cise has a fireplace near the entrance. A husband and wife would traditionally sit on the fireplace's left side (called shiso). Children and guests would sit facing them on the fireplace's right side (called harkiso). The cise has a platform for valuables called iyoykir behind the shiso. Ainu place sintoko (hokai) and ikayop (quivers) there. Traditions The Ainu people have various types of marriage. A child is traditionally promised in marriage by arrangement between their parents and the parents of their betrothed, or by a go-between. When the betrothed reach a marriageable age, they are told who their spouse is to be. There are also traditional marriages based on mutual consent of both sexes. In some areas, when a daughter reaches a marriageable age, her parents allow her to live in a small room called a tunpu, annexed to the southern wall of the house. The parents choose her husband from the men who visit her. The age of marriage is 17 to 18 years of age for men and 15 to 16 years of age for women, who are traditionally tattooed. At these ages, both sexes are regarded as adults. When a man proposes to a woman in traditional fashion, he visits her house, and she hands him a full bowl of rice. He then eats half of the rice and returns the rest to her. If the woman eats the remaining rice, she accepts his proposal. If she does not and instead puts it beside her, she rejects his proposal. When a man and woman become engaged or learn that their engagement has been arranged, they exchange gifts. The man sends her a small engraved knife, a workbox, a spool, and other gifts. She sends him embroidered clothes, coverings for the back of the hand, leggings, and other handmade clothes. The worn-out fabric of old clothing is used for baby clothes, because soft cloth is good for their skin . Additionally, worn-out material was thought to protect babies from the gods of illness and demons, due to these entities's abhorrence of dirty things. Before a baby is breast-fed, they are given a decoction of the endodermis of an alder and the roots of butterburs to discharge impurities. Children are raised almost naked until about the ages of four to five. Even when they wear clothes, they do not wear belts and leave the front of their clothes open. Subsequently, they wear bark clothes without patterns, such as attush, until coming of age. Ainu babies traditionally are not given permanent names when they are born. Rather, they are called by various temporary names until the age of two or three. Newborn babies are named ayay ("a baby's crying"), shipo, poyshi ("small excrement"), and shion ("old excrement"). Their tentative names have a portion meaning "excrement" or "old things" to ward off the demon of ill-health. Some children are named based on their behaviour or habits; others are named after notable events or after parents' wishes for their future . When children are named, they are never given the same names as others. Men traditionally wear loincloths and have their hair dressed properly for the first time at age 15–16. Women are also considered adults at the age of 15–16. They traditionally wear underclothes called mour and have their hair dressed properly, with wound waistcloths called raunkut and ponkut around their bodies. When women reached age 12–13, the lips, hands, and arms were traditionally tattooed. When they reached age 15–16, their tattoos would be completed, indicating their qualification for marriage. Religion The Ainu are traditionally animists, believing that everything in nature has a (spirit or god) on the inside. The most important include , goddess of the hearth; , god of bears and mountains; and , god of the sea, fishing, and marine animals. is regarded as the creator of the world in the Ainu religion. Ainu craftsmen, and the Ainu as a whole, traditionally believed that "anything made with deep sincerity was imbued with spirit and also became a [kamuy]" They also held the belief that ancestors and the power of the family could be invoked through certain patterns in art to protect them from malignant influences. The Ainu religion has no priests by profession. Instead, the village chief performs whatever religious ceremonies are necessary. Ceremonies are confined to making libations of , saying prayers, and offering willow sticks with wooden shavings attached to them. These sticks are called (singular) and (plural). They are placed on an altar used to "send back" the spirits of killed animals. Ainu ceremonies for sending back bears are called . The Ainu people give thanks to the gods before eating and pray to the deity of fire in time of sickness. Traditional Ainu belief holds that their spirits are immortal, and that their spirits will be rewarded hereafter by ascending to (Land of the Gods). The Ainu are part of a larger collective of indigenous people who practice "arctolatry" or bear worship. The Ainu believe that the bear holds particular importance as 's chosen method of delivering the gift of the bear's hide and meat to humans. John Batchelor reported that the Ainu view the world as being a spherical ocean on which float many islands, a view based on the fact that the sun rises in the east and sets in the west. He wrote that they believe the world rests on the back of a large fish, which when it moves causes earthquakes. Ainu assimilated into mainstream Japanese society have adopted Buddhism and Shintō; some northern Ainu were converted as members of the Russian Orthodox Church. Regarding Ainu communities in () and other areas that fall within the Russian sphere of cultural influence, there have been a few churches constructed, and some Ainu are reported to have accepted the Christian faith. There have also been reports that the Russian Orthodox Church has performed some missionary projects in the Sakhalin Ainu community. However, there are only reports of a few conversions to Christianity. Converts have been scorned as (Russian Ainu) by other members of the Ainu community. Reports indicate that many Ainu have kept their faith in their traditional deities . According to a 2012 survey conducted by Hokkaidō University, a high percentage of Ainu are members of their household family religion, which is Buddhism (especially Buddhism). However, it is noted that similar to the Japanese religious consciousness, there is not a strong feeling of identification with a particular religion, with Buddhist and traditional beliefs both being part of their daily life culture. Rituals Ainu religion consists of a pantheistic animist structure, in which the world is founded on interactions between humans and Kamuy. Within all living beings, natural forces, and objects there is a Ramat (sacred life force) that is an extension of a greater Kamuy. Kamuy are gods or spirits that choose to visit the human world in temporary physical forms, both animate and inanimate, within the human world. Once the physical vessel dies or breaks, the Ramat returns to the Kamuy and leaves its physical form behind as a gift to the humans. If the humans treated the vessel and Kamuy with respect and gratitude, then the Kamuy would return out of delight for the human world. Due to this interaction, the Ainu lived with deep reverence for nature and all objects and phenomena in hopes that the Kamuy would return. The Ainu believed that the Kamuy granted objects, skills, and knowledge to utilize tools to humans, and thus deserve respect and worship. Daily practices included the moderation of hunting, gathering, and harvesting to not disturb the Kamuy. Often, the Ainu would make offerings of an Inau (sacred shaved stick), which usually consisted of whittled willow tree wood with decorative shavings still attached, and wine to the Kamuy. They also built sacred altars called Nusa (fence-like row of taller Inau decorated with bear skulls) separated from the main house and raised storehouses and often observed outdoor rituals. The Ainu people observed a ritual that would return Kamuy, a divine or spiritual being in Ainu mythology, to the spiritual realm. This Kamuy sending ritual was called Omante. A bear cub would be captured alive during hibernation and raised in the village as a child. Women would care for the cubs as if they were their children, sometimes even nursing them if needed. Once the bears reached maturity, they would hold another ritual every 5 to 10 years called Iomante (sometimes Iyomante). People from neighboring villages were invited to help celebrate this ritual, in which members of the village would send the bear back to the realm of spirits by gathering around it in a central area and using special ceremonial arrows to shoot it. Afterwards, they would eat the meat. However, in 1955 this ritual was outlawed as animal cruelty. In 2007, it became exempt due to its cultural significance to The Ainu people. The ritual has since been modified; it is now an annual festival. The festival begins at sundown with a torch parade. A play is then performed, and this is followed by music and dancing. Other rituals were performed for things such as food and illness. The Ainu had a ritual to welcome the salmon, praying for a big catch, and another to thank the salmon at the end of the season. There was also a ritual for warding off Kamuy that would bring epidemics, using strong-smelling herbs placed in doorways, windows, and gardens in order to turn away epidemic Kamuy. Similarly to many religions, the Ainu also gave prayers and offerings to their ancestors in the spirit world or afterlife. They would also pray to the fire Kamuy to deliver their offerings of broken snacks and fruit as well as tobacco(Ainu, Everyculture). Dancing in Rituals Traditional dances are performed at ceremonies and banquets. Dancing is a part of the newly organized cultural festivals, and it is even done privately in daily life. Ainu traditional dances often involve large circles of dancers, and sometimes there are onlookers that sing without musical instruments. In rituals these dances are intimate; they involve the calls and movements of animals and/or insects. Some, like the sword and bow dances, are rituals that were used to worship and give thanks for nature. This was to thank deities that they believed were in their surroundings. there was also a dance in Iomante that mimicked the movements of a living bear. However, some dances are improvised and meant just for entertainment. Overall Ainu traditional dancing reinforced their connection to nature, the religious world, and provided a link to other arctic cultures. Funerals Funerals included prayers & offerings to the fire kamuy, as well as verse laments expressing wishes for a smooth journey to the next world. The items that were to be buried with the dead were first broken or cracked to allow spirits to be released and travel to the afterlife together. Sometimes a burial would be followed by burning the residence of the dead. In the event of an unnatural death, there would be a speech raging against the gods. In the afterlife, recognized ancestral spirits moved through and influenced the world, though neglected spirits would return to the living world and cause misfortune. Prosperity of family in the afterlife would depend on prayers and offerings left by living descendants; this often led to Ainu parents teaching their children to look after them in the afterlife (Ainu, Everyculture). Institutions Most Hokkaidō Ainu, and some other Ainu, are members of an umbrella group called the Hokkaido Ainu Association. The organization changed its name to Hokkaidō Utari Association in 1961, due to the fact that the word Ainu was often used in a derogatory manner by the non-Ainu ethnic Japanese. It was changed back to the Hokkaido Ainu Association in 2009 after the passing of the new law regarding the Ainu. The organization was originally controlled by the government to speed Ainu assimilation and integration into the Japanese nation-state. It now is run exclusively by Ainu and operates mostly independently of the government. Other key institutions include The Foundation for Research and Promotion of Ainu Culture (FRPAC), established by the Japanese government after enactment of the Ainu Culture Law in 1997; the Hokkaidō University Center for Ainu and Indigenous Studies established in 2007; and various museums and cultural centers. Ainu people living in Tokyo have also developed a vibrant political and cultural community. Since late 2011, the Ainu have developed cultural exchange and cooperation with the Sámi people of northern Europe. Both the Sámi and the Ainu participate in the organization for Arctic indigenous peoples and the Sámi research office in Lapland (Finland). Currently, there are several Ainu museums and cultural parks. The most famous are: National Ainu Museum Kawamura Kaneto Ainu museum Ainu Kotan Ainu folklore museum Hokkaido Museum of Northern Peoples Ethnic rights Legal action On 27 March, 1997, the Sapporo District Court decided a landmark case that, for the first time in Japanese history, recognized the right of the Ainu people to enjoy their distinct culture and traditions. The case arose because of a 1978 government plan to build two dams in the Saru River watershed in southern Hokkaidō. The dams were part of a series of development projects under the Second National Development Plan that were intended to industrialize the north of Japan. The planned location for one of the dams was across the valley floor near Nibutani village, the home of a large community of Ainu people and an important center of Ainu culture and history. When the government commenced construction on the dam in the early 1980s, two Ainu landowners refused to agree to the expropriation of their property. These landowners were Kaizawa Tadashi and Kayano Shigeru—well-known and important leaders in the Ainu community. After Kaizawa and Kayano declined to sell their land, the Hokkaidō Development Bureau applied for and was subsequently granted a Project Authorization, which required the men to vacate their land. When their appeal of the Authorization was denied, Kayano and Kaizawa's son Koichi (Kaizawa died in 1992) filed suit against the Hokkaidō Development Bureau. The final decision denied the relief sought by the plaintiffs for pragmatic reasons (the dam was already in place), but the decision was nonetheless heralded as a landmark victory for the Ainu people. Nearly all of the plaintiffs' claims were recognized. Moreover, the decision marked the first time Japanese case law acknowledged the Ainu as an indigenous people and contemplated the responsibility of the Japanese nation to the indigenous people within its borders. The decision included broad fact-finding that underscored the long history of the oppression of the Ainu people by Japan's majority, referred to as wajin in the case and discussions about the case. The decision was issued on March 27, 1997. Because of the broad implications for Ainu rights, the plaintiffs decided not to appeal the decision, which became final two weeks later. After the decision was issued, on 8 May, 1997, the Diet passed the Ainu Culture Law and repealed the Ainu Protection Act—the 1899 law that had been the vehicle of Ainu oppression for almost one hundred years. While the Ainu Culture Law has been widely criticized for its shortcomings, the shift that it represents in Japan's view of the Ainu people is a testament to the importance of the Nibutani decision. In 2007, the 'Cultural Landscape along the Sarugawa River resulting from Ainu Tradition and Modern Settlement' was designated an Important Cultural Landscape of Japan. A later action seeking restoration of Ainu assets held in trust by the Japanese Government was dismissed in 2008. Governmental bodies on Ainu affairs There is no single government body to coordinate Ainu affairs. Rather, various advisory boards are set up by the Hokkaido government to advise on specific matters. One such committee operated in the late 1990s, and its work resulted in the . This panel was criticized for including no Ainu members. In 2006, another panel was established, which notably included an Ainu member for the first time. It completed its work in 2008 issuing a major report that included an extensive historical record and called for substantial government policy changes towards the Ainu. Formation of Ainu political party On 21 January, 2012, the was founded after a group of Ainu activists in Hokkaidō had announced the formation of a political party for the Ainu on 30 October, 2011. The Ainu Association of Hokkaidō reported that Kayano Shiro, the son of the former Ainu leader Kayano Shigeru, would head the party. Their aim is to contribute to the realization of a multicultural and multiethnic society in Japan, along with rights for the Ainu. Official promotion The "2019 Ainu act" simplified procedures for obtaining various permissions from authorities in regards to the traditional lifestyle of the Ainu and nurture the identity and cultures of the Ainu without defining the ethnic group by blood lineage. On 12 July, 2020, the National Ainu Museum was opened. It had originally been scheduled to open on 24 April, 2020, prior to the Tokyo Olympic and Paralympic Games scheduled in the same year, in Shiraoi, Hokkaidō. The park was planned to be a base for the protection and promotion of Ainu people, culture, and language. The museum promotes the culture and habits of the Ainu people who are the original inhabitants of Hokkaidō. Upopoy in Ainu language means "singing in a large group". The National Ainu Museum building has images and videos exhibiting the history and daily life of the Ainu. The Ainu cultural contribution is also recognised by a UNESCO listing, in consequence of a UNESCO decision to list non-physical cultural assets, including songs and dancing. In July 2023, it was reported that a group of Ainu from Hokkaido was suing the government to reclaim the right of salmon river fishing. This has been outlawed for a century, except for an exemption of a limited number of salmon for ceremonial purposes. The group claimed the Japanese government did not abide by the 2007 United Nations Declaration on the Rights of Indigenous People, which it had signed. Situation in Russia As a result of the Treaty of Saint Petersburg (1875), the Kuril Islands – along with their Ainu inhabitants – came under Japanese administration. A total of 83 North Kuril Ainu arrived in Petropavlovsk-Kamchatsky on September 18, 1877, after they decided to remain under Russian rule. They refused the offer by Russian officials to move to new reservations in the Commander Islands. An agreement was reached in 1881, and the Ainu decided to settle in the village of Yavin. In March 1881, the group left Petropavlovsk and started the journey towards Yavin on foot. Four months later they arrived at their new homes. Another village, Golygino, was founded later. Under Soviet rule, both the villages were forced to disband, and residents were moved to the Russian-dominated Zaporozhye rural settlement in Ust-Bolsheretsky Raion. As a result of intermarriage, the three ethnic groups assimilated to form the Kamchadal community. In 1953, K. Omelchenko, the minister for the protection of military and state secrets in the USSR, banned the press from publishing any more information on the Ainu living in the USSR. This order was revoked after two decades. , the North Kuril Ainu of Zaporozhye form the largest Ainu subgroup in Russia. The Nakamura clan (South Kuril Ainu on their paternal side), the smallest group, numbers just six people residing in Petropavlovsk. On Sakhalin island, a few dozen people identify themselves as Sakhalin Ainu, but many more with partial Ainu ancestry do not acknowledge it. Most of the 888 Japanese people living in Russia (2010 Census) are of mixed Japanese–Ainu ancestry, although they do not acknowledge it (full Japanese ancestry gives them the right of visa-free entry to Japan.) Similarly, no one identifies themselves as Amur Valley Ainu, although people with partial descent live in Khabarovsk. There is no evidence of living descendants of the Kamchatka Ainu. In the 2010 Census of Russia, nearly 100 people tried to register themselves as ethnic Ainu in the village, but the governing council of Kamchatka Krai rejected their claim and enrolled them as ethnic Kamchadal. In 2011, the leader of the Ainu community in Kamchatka, Alexei Vladimirovich Nakamura, requested that Vladimir Ilyukhin (Governor of Kamchatka) and Boris Nevzorov (Chairman of the State Duma) include the Ainu in the central list of the Indigenous small-numbered peoples of the North, Siberia and the Far East. This request was also denied. Ethnic Ainu living in Sakhalin Oblast and Khabarovsk Krai are not organized politically. According to Alexei Nakamura, only 205 Ainu live in Russia (up from just 12 people who self-identified as Ainu in 2008). They, along with the Kurile Kamchadals (Itelmen of Kuril islands), are fighting for official recognition. Since the Ainu are not recognized in the official list of the peoples living in Russia, they are counted as people without nationality, as ethnic Russians, or as Kamchadal. The Ainu have emphasized that they were the natives of the Kuril islands, and that the Japanese and Russians were both invaders. In 2004, the small Ainu community living in Russia in Kamchatka Krai wrote a letter to Vladimir Putin, urging him to reconsider any move to award the Southern Kuril Islands to Japan. In the letter they blamed the Japanese, the Tsarist Russians, and the Soviets for crimes against the Ainu such as killings and assimilation; they also urged him to recognize the Japanese genocide against the Ainu people. This proposal was rejected. , both the Kuril Ainu and Kuril Kamchadal ethnic groups lack the fishing and hunting rights which the Russian government grants to the indigenous tribal communities of the far north. In March 2017, Alexei Nakamura revealed that plans for an Ainu village to be created in Petropavlovsk-Kamchatsky and plans for an Ainu dictionary are underway. Geography The traditional locations of the Ainu are Hokkaido, Sakhalin, the Kuril Islands, Kamchatka, and the northern Tohoku region. Many of the place names that remain in Hokkaido and the Kuril Islands have a phonetic equivalent of the Ainu place names. In 1756 CE, a kanjō-bugyō (a high-ranking Edo period official responsible for finance) implemented an assimilation policy for Ainu engaged in fishing in the Tsugaru Peninsula. From that point on, Ainu culture rapidly disappeared from Honshu. After the Treaty of Saint Petersburg (1875), most of the Ainu from the Kuril islands were moved to the island of Shikotan by providing the pioneers with essential life supplies and for defense purposes (Kurishima Cruise Diary). In 1945, the Soviet Union invaded Japan and occupied Sakhalin and the Kuril Islands. The Ainu who lived there were repatriated to their home country, Japan, except for those who indicated their willingness to remain. Population The population of the Ainu during the Edo period was a maximum of 26,800; it has since declined, due in part to the spread of infectious diseases. It was traditionally regarded as a Tenryō territory. According to the 1897 Russian census, 1,446 Ainu native speakers lived in Russian territory. Currently, there is no Ainu category in the Japanese national census, and no fact-finding has been conducted by national institutions. Therefore, the exact number of Ainu people is unknown. However, multiple surveys have been conducted that provide an indication of the total population. According to a 2006 Hokkaido Agency survey, there were 23,782 Ainu people in Hokkaido. When viewed by the branch office (currently the Promotion Bureau), there are many in the Iburi / Hidaka branch office. The definition of "Ainu" by the Hokkaido Agency in this survey is "a person who seems to have inherited the blood of Ainu" or "the same livelihood as those with marriage or adoption." Additionally, if the other person is declared not to be "Ainu", then it is not subject to investigation. A 1971 survey determined an Ainu population of 77,000. Another survey yielded a total number of Ainu living in Japan of 200,000. However, there are no other surveys that support this high estimate. Many Ainu live outside Hokkaido. A 1988 survey estimated that the population of Ainu living in Tokyo was 2,700. According to a 1989 survey report on Utari living in Tokyo, it is estimated that the Ainu population of the Tokyo area alone exceeds 10% of Ainu living in Hokkaido; there are more than 10,000 Ainu living in the Tokyo metropolitan area. In addition to Japan and Russia, it was reported in 1992 that there was a descendant of Kuril Ainu in Poland, but there are also indications that they are a descendant of the Aleut. On the other hand, the descendant of the children born in Poland by the Polish anthropologist Bronisław Piłsudski, who was a leading Ainu researcher and left a vast amount of research material such as photographs and wax tubes, was born in Japan. According to a 2017 survey, the Ainu population in Hokkaido is about 13,000. This is a sharp drop from 24,000 in 2006. However, this is partially due to a decrease in membership in the Ainu Association of Hokkaido, which is cooperating with the survey. Additionally, interest in protecting personal information has increased. It is thought that the number of individuals who cooperate is declining, and that it does not match the actual population of Ainu people. Subgroups These are unofficial sub groups of the Ainu people with location and population estimates. In popular culture The characters Nakoruru, Rimururu, and Rera from the SNK game series Samurai Shodown are Ainu. The manga and anime series Golden Kamuy has an Ainu girl, Asirpa, as one of the protagonists, and features many aspects of Ainu culture. The character Asirpa from Golden Kamuy is of Ainu descent. The character Fredzilla from Big Hero 6 is of Ainu descent. The character Okuru from the anime series Samurai Champloo is the sole survivor of an Ainu village wiped out by disease. Usui Horokeu, also known as Horohoro, from the manga series Shaman King is a member of an Ainu tribe. "Ainu" is a playable nation in the game Europa Universalis IV. The history of the island of Hokkaido, and of the Ainu people, are part of the plot of a chapter in the manga Silver Spoon. A coming-of-age film, Ainu Mosir, was released in Japan on 17 October, 2020. The film portrays Kanto, a sensitive 14-year-old Ainu boy, who struggles to come to terms with his father's death and his identity. The film also focuses on the dilemma of controversial bear sacrifice under the shadow of the modern Japanese society and the Ainu's heavy reliance on tourists for their livelihood. Along with other restless teenagers, Kanto is under pressure to retain his Ainu identity and participate in the cultural rituals. In the James Bond novel and film You Only Live Twice and film, Bond's character spends some time living in an Ainu village and (in the film) is supposedly disguised as one of the local people, "marrying" a local pearl fisher () as part of his cover. In the 2013 samurai film Unforgiven, starring Ken Watanabe and which is a remake of the 1992 Clint Eastwood Western film of the same name, the character of Goro Sawada (Yuya Yagira) is half-Ainu. See also Ainu-ken Akira Ifukube Bibliography of the Ainu Bikki Sunazawa Constitution of Japan Declaration on the Rights of Indigenous Peoples Emishi Aterui Ethnocide Genocide of indigenous peoples Hiram M. Hiller Jr. Indigenous peoples Kankō Ainu Takashi Ukaji Shigeru Kayano Nibutani Dam Ainu culture Ainu music Ainu flag Ainu genre painting Ikupasuy Iomante Matagi Yukar Ethnic groups in Japan Ethnic issues in Japan Human rights in Japan Ryukyuan people Ryūkyū independence movement Nivkhs References Citations Sources Japan Times. Ainu Plan Group for Upper House Run, October 31, 2011 Further reading Hitchingham, Masako Yoshida (trans.), Act for the Promotion of Ainu Culture & Dissemination of Knowledge Regarding Ainu Traditions, Asian-Pacific Law & Policy Journal, vol. 1, no. 1 (2000). Kayano, Shigeru (1994). Our Land Was A Forest: An Ainu Memoir. Westview Press. . . (Harvard University)(Digitized January 24, 2006) (Indiana University) (digitized September 3, 2009) [Original from Harvard University Digitized Jan 30, 2008] [YOKOHAMA : R. MEIKLEJOHN & CO., NO 49.] The Collected Works of Bronisław Piłsudski, translated and edited by Alfred F. Majewicz with the assistance of Elzbieta Majewicz. Volume 1: The Aborigines of Sakhalin Volume 2: Materials for the Study of the Ainu Language and Folklore (Kraków 1912) Volume 3: Materials for the Study of the Ainu Language and Folklore II Volumn 4: Materials for the Study of Tungusic Languages and Folklore External links Organizations Hokkaido Utari Kyokai/Ainu Association of Hokkaido Sapporo Pirka Kotan Ainu Cultural Center Foundation for Research and Promotion of Ainu Culture (centers located in Sapporo and Tokyo) Hokkaido University Center for Ainu and Indigenous Studies Institute for the Study of Languages and Cultures of Ainu in Samani, Hokkaidō Foundation for Ainu Culture Museums and exhibits Smithsonian Institution The Boone Collection Nibutani Ainu Cultural Museum The Ainu Museum at Shiraoi Ainu Komonjo (18th & 19th century records) – Ohnuki Collection The Regions: North America—Ainu–North American cultural similarities Articles "Japan's Ainu hope new identity leads to more rights" in The Christian Science Monitor, June 9, 2008 A Salmon's Life: An Incredible Journey (Columbia River basin, June 8, 2016)—Posterback Activities Video "A Trip through Japan with the YWCA (ca. 1919)" —Rare Japanese video featuring Ainu The Ainu: The First Peoples of Japan. Old videos and photographs arranged by Rawn Joseph "The Despised Ainu People". The Ainus' Tense Relationship with Japan. 1994. Journeyman.tv Ethnic groups in Japan Ethnic groups in Russia History of Hokkaido History of Northeast Asia History of Sakhalin Indigenous peoples of East Asia People of Kamakura-period Japan Russian people of Japanese descent Genocides in Asia	6
Acupuncture is a form of alternative medicine and a component of traditional Chinese medicine (TCM) in which thin needles are inserted into the body. Acupuncture is a pseudoscience; the theories and practices of TCM are not based on scientific knowledge, and it has been characterized as quackery. There is a range of acupuncture variants which originated in different philosophies, and techniques vary depending on the country in which it is performed. However, it can be divided into two main foundational philosophical applications and approaches; the first form being the modern standardized form called eight principles TCM and the second an older system that is based on the ancient Daoist wuxing, better known as the five elements or phases in the West. Acupuncture is most often used to attempt pain relief, though acupuncturists say that it can also be used for a wide range of other conditions. Acupuncture is generally used only in combination with other forms of treatment. The global acupuncture market was worth US$24.55 billion in 2017. The market was led by Europe with a 32.7% share, followed by Asia-Pacific with a 29.4% share and the Americas with a 25.3% share. It was estimated in 2021 that the industry would reach a market size of $55bn by 2023. The conclusions of trials and systematic reviews of acupuncture generally provide no good evidence of benefit, which suggests that it is not an effective method of healthcare. Acupuncture is generally safe when done by appropriately trained practitioners using clean needle technique and single-use needles. When properly delivered, it has a low rate of mostly minor adverse effects. When accidents and infections do occur, they are associated with neglect on the part of the practitioner, particularly in the application of sterile techniques. A review conducted in 2013 stated that reports of infection transmission increased significantly in the preceding decade. The most frequently reported adverse events were pneumothorax and infections. Since serious adverse events continue to be reported, it is recommended that acupuncturists be trained sufficiently to reduce the risk. Scientific investigation has not found any histological or physiological evidence for traditional Chinese concepts such as qi, meridians, and acupuncture points, and many modern practitioners no longer support the existence of life force energy (qi) or meridians, which was a major part of early belief systems. Acupuncture is believed to have originated around 100 BC in China, around the time The Inner Classic of Huang Di (Huangdi Neijing) was published, though some experts suggest it could have been practiced earlier. Over time, conflicting claims and belief systems emerged about the effect of lunar, celestial and earthly cycles, yin and yang energies, and a body's "rhythm" on the effectiveness of treatment. Acupuncture fluctuated in popularity in China due to changes in the country's political leadership and the preferential use of rationalism or scientific medicine. Acupuncture spread first to Korea in the 6th century AD, then to Japan through medical missionaries, and then to Europe, beginning with France. In the 20th century, as it spread to the United States and Western countries, spiritual elements of acupuncture that conflicted with scientific knowledge were sometimes abandoned in favor of simply tapping needles into acupuncture points. Clinical practice Acupuncture is a form of alternative medicine. It is used most commonly for pain relief, though it is also used to treat a wide range of conditions. Acupuncture is generally only used in combination with other forms of treatment. For example, the American Society of Anesthesiologists states it may be considered in the treatment for nonspecific, noninflammatory low back pain only in conjunction with conventional therapy. Acupuncture is the insertion of thin needles into the skin. According to the Mayo Foundation for Medical Education and Research (Mayo Clinic), a typical session entails lying still while approximately five to twenty needles are inserted; for the majority of cases, the needles will be left in place for ten to twenty minutes. It can be associated with the application of heat, pressure, or laser light. Classically, acupuncture is individualized and based on philosophy and intuition, and not on scientific research. There is also a non-invasive therapy developed in early 20th century Japan using an elaborate set of instruments other than needles for the treatment of children (shōnishin or shōnihari). Clinical practice varies depending on the country. A comparison of the average number of patients treated per hour found significant differences between China (10) and the United States (1.2). Chinese herbs are often used. There is a diverse range of acupuncture approaches, involving different philosophies. Although various different techniques of acupuncture practice have emerged, the method used in traditional Chinese medicine (TCM) seems to be the most widely adopted in the US. Traditional acupuncture involves needle insertion, moxibustion, and cupping therapy, and may be accompanied by other procedures such as feeling the pulse and other parts of the body and examining the tongue. Traditional acupuncture involves the belief that a "life force" (qi) circulates within the body in lines called meridians. The main methods practiced in the UK are TCM and Western medical acupuncture. The term Western medical acupuncture is used to indicate an adaptation of TCM-based acupuncture which focuses less on TCM. The Western medical acupuncture approach involves using acupuncture after a medical diagnosis. Limited research has compared the contrasting acupuncture systems used in various countries for determining different acupuncture points and thus there is no defined standard for acupuncture points. In traditional acupuncture, the acupuncturist decides which points to treat by observing and questioning the patient to make a diagnosis according to the tradition used. In TCM, the four diagnostic methods are: inspection, auscultation and olfaction, inquiring, and palpation. Inspection focuses on the face and particularly on the tongue, including analysis of the tongue size, shape, tension, color and coating, and the absence or presence of teeth marks around the edge. Auscultation and olfaction involve listening for particular sounds such as wheezing, and observing body odor. Inquiring involves focusing on the "seven inquiries": chills and fever; perspiration; appetite, thirst and taste; defecation and urination; pain; sleep; and menses and leukorrhea. Palpation is focusing on feeling the body for tender "A-shi" points and feeling the pulse. Needles The most common mechanism of stimulation of acupuncture points employs penetration of the skin by thin metal needles, which are manipulated manually or the needle may be further stimulated by electrical stimulation (electroacupuncture). Acupuncture needles are typically made of stainless steel, making them flexible and preventing them from rusting or breaking. Needles are usually disposed of after each use to prevent contamination. Reusable needles when used should be sterilized between applications. In many areas, only sterile, single-use acupuncture needles are allowed, including the State of California, USA. Needles vary in length between , with shorter needles used near the face and eyes, and longer needles in areas with thicker tissues; needle diameters vary from 0 to 0, with thicker needles used on more robust patients. Thinner needles may be flexible and require tubes for insertion. The tip of the needle should not be made too sharp to prevent breakage, although blunt needles cause more pain. Apart from the usual filiform needle, other needle types include three-edged needles and the Nine Ancient Needles. Japanese acupuncturists use extremely thin needles that are used superficially, sometimes without penetrating the skin, and surrounded by a guide tube (a 17th-century invention adopted in China and the West). Korean acupuncture uses copper needles and has a greater focus on the hand. Needling technique Insertion The skin is sterilized and needles are inserted, frequently with a plastic guide tube. Needles may be manipulated in various ways, including spinning, flicking, or moving up and down relative to the skin. Since most pain is felt in the superficial layers of the skin, a quick insertion of the needle is recommended. Often the needles are stimulated by hand in order to cause a dull, localized, aching sensation that is called de qi, as well as "needle grasp," a tugging feeling felt by the acupuncturist and generated by a mechanical interaction between the needle and skin. Acupuncture can be painful. The acupuncturist's skill level may influence the painfulness of the needle insertion; a sufficiently skilled practitioner may be able to insert the needles without causing any pain. De-qi sensation De-qi (; "arrival of qi") refers to a claimed sensation of numbness, distension, or electrical tingling at the needling site. If these sensations are not observed then inaccurate location of the acupoint, improper depth of needle insertion, inadequate manual manipulation, are blamed. If de-qi is not immediately observed upon needle insertion, various manual manipulation techniques are often applied to promote it (such as "plucking", "shaking" or "trembling"). Once de-qi is observed, techniques might be used which attempt to "influence" the de-qi; for example, by certain manipulation the de-qi can allegedly be conducted from the needling site towards more distant sites of the body. Other techniques aim at "tonifying" () or "sedating" () qi. The former techniques are used in deficiency patterns, the latter in excess patterns. De qi is more important in Chinese acupuncture, while Western and Japanese patients may not consider it a necessary part of the treatment. Related practices Acupressure, a non-invasive form of bodywork, uses physical pressure applied to acupressure points by the hand or elbow, or with various devices. Acupuncture is often accompanied by moxibustion, the burning of cone-shaped preparations of moxa (made from dried mugwort) on or near the skin, often but not always near or on an acupuncture point. Traditionally, acupuncture was used to treat acute conditions while moxibustion was used for chronic diseases. Moxibustion could be direct (the cone was placed directly on the skin and allowed to burn the skin, producing a blister and eventually a scar), or indirect (either a cone of moxa was placed on a slice of garlic, ginger or other vegetable, or a cylinder of moxa was held above the skin, close enough to either warm or burn it). Cupping therapy is an ancient Chinese form of alternative medicine in which a local suction is created on the skin; practitioners believe this mobilizes blood flow in order to promote healing. Tui na is a TCM method of attempting to stimulate the flow of qi by various bare-handed techniques that do not involve needles. Electroacupuncture is a form of acupuncture in which acupuncture needles are attached to a device that generates continuous electric pulses (this has been described as "essentially transdermal electrical nerve stimulation [TENS] masquerading as acupuncture"). Fire needle acupuncture also known as fire needling is a technique which involves quickly inserting a flame-heated needle into areas on the body. Sonopuncture is a stimulation of the body similar to acupuncture using sound instead of needles. This may be done using purpose-built transducers to direct a narrow ultrasound beam to a depth of 6–8 centimetres at acupuncture meridian points on the body. Alternatively, tuning forks or other sound emitting devices are used. Acupuncture point injection is the injection of various substances (such as drugs, vitamins or herbal extracts) into acupoints. This technique combines traditional acupuncture with injection of what is often an effective dose of an approved pharmaceutical drug, and proponents claim that it may be more effective than either treatment alone, especially for the treatment of some kinds of chronic pain. However, a 2016 review found that most published trials of the technique were of poor value due to methodology issues and larger trials would be needed to draw useful conclusions. Auriculotherapy, commonly known as ear acupuncture, auricular acupuncture, or auriculoacupuncture, is considered to date back to ancient China. It involves inserting needles to stimulate points on the outer ear. The modern approach was developed in France during the early 1950s. There is no scientific evidence that it can cure disease; the evidence of effectiveness is negligible. Scalp acupuncture, developed in Japan, is based on reflexological considerations regarding the scalp. Koryo hand acupuncture, developed in Korea, centers around assumed reflex zones of the hand. Medical acupuncture attempts to integrate reflexological concepts, the trigger point model, and anatomical insights (such as dermatome distribution) into acupuncture practice, and emphasizes a more formulaic approach to acupuncture point location. Cosmetic acupuncture is the use of acupuncture in an attempt to reduce wrinkles on the face. Bee venom acupuncture is a treatment approach of injecting purified, diluted bee venom into acupoints. Veterinary acupuncture is the use of acupuncture on domesticated animals. Efficacy many thousands of papers had been published on the efficacy of acupuncture for the treatment of various adult health conditions, but there was no robust evidence it was beneficial for anything, except shoulder pain and fibromyalgia. For Science-Based Medicine, Steven Novella wrote that the overall pattern of evidence was reminiscent of that for homeopathy, compatible with the hypothesis that most, if not all, benefits were due to the placebo effect, and strongly suggestive that acupuncture had no beneficial therapeutic effects at all. Research methodology and challenges Sham acupuncture and research It is difficult but not impossible to design rigorous research trials for acupuncture. Due to acupuncture's invasive nature, one of the major challenges in efficacy research is in the design of an appropriate placebo control group. For efficacy studies to determine whether acupuncture has specific effects, "sham" forms of acupuncture where the patient, practitioner, and analyst are blinded seem the most acceptable approach. Sham acupuncture uses non-penetrating needles or needling at non-acupuncture points, e.g. inserting needles on meridians not related to the specific condition being studied, or in places not associated with meridians. The under-performance of acupuncture in such trials may indicate that therapeutic effects are due entirely to non-specific effects, or that the sham treatments are not inert, or that systematic protocols yield less than optimal treatment. A 2014 review in Nature Reviews Cancer found that "contrary to the claimed mechanism of redirecting the flow of qi through meridians, researchers usually find that it generally does not matter where the needles are inserted, how often (that is, no dose-response effect is observed), or even if needles are actually inserted. In other words, 'sham' or 'placebo' acupuncture generally produces the same effects as 'real' acupuncture and, in some cases, does better." A 2013 meta-analysis found little evidence that the effectiveness of acupuncture on pain (compared to sham) was modified by the location of the needles, the number of needles used, the experience or technique of the practitioner, or by the circumstances of the sessions. The same analysis also suggested that the number of needles and sessions is important, as greater numbers improved the outcomes of acupuncture compared to non-acupuncture controls. There has been little systematic investigation of which components of an acupuncture session may be important for any therapeutic effect, including needle placement and depth, type and intensity of stimulation, and number of needles used. The research seems to suggest that needles do not need to stimulate the traditionally specified acupuncture points or penetrate the skin to attain an anticipated effect (e.g. psychosocial factors). A response to "sham" acupuncture in osteoarthritis may be used in the elderly, but placebos have usually been regarded as deception and thus unethical. However, some physicians and ethicists have suggested circumstances for applicable uses for placebos such as it might present a theoretical advantage of an inexpensive treatment without adverse reactions or interactions with drugs or other medications. As the evidence for most types of alternative medicine such as acupuncture is far from strong, the use of alternative medicine in regular healthcare can present an ethical question. Using the principles of evidence-based medicine to research acupuncture is controversial, and has produced different results. Some research suggests acupuncture can alleviate pain but the majority of research suggests that acupuncture's effects are mainly due to placebo. Evidence suggests that any benefits of acupuncture are short-lasting. There is insufficient evidence to support use of acupuncture compared to mainstream medical treatments. Acupuncture is not better than mainstream treatment in the long term. The use of acupuncture has been criticized owing to there being little scientific evidence for explicit effects, or the mechanisms for its supposed effectiveness, for any condition that is discernible from placebo. Acupuncture has been called 'theatrical placebo', and David Gorski argues that when acupuncture proponents advocate 'harnessing of placebo effects' or work on developing 'meaningful placebos', they essentially concede it is little more than that. Publication bias Publication bias is cited as a concern in the reviews of randomized controlled trials of acupuncture. A 1998 review of studies on acupuncture found that trials originating in China, Japan, Hong Kong, and Taiwan were uniformly favourable to acupuncture, as were ten out of eleven studies conducted in Russia. A 2011 assessment of the quality of randomized controlled trials on traditional Chinese medicine, including acupuncture, concluded that the methodological quality of most such trials (including randomization, experimental control, and blinding) was generally poor, particularly for trials published in Chinese journals (though the quality of acupuncture trials was better than the trials testing traditional Chinese medicine remedies). The study also found that trials published in non-Chinese journals tended to be of higher quality. Chinese authors use more Chinese studies, which have been demonstrated to be uniformly positive. A 2012 review of 88 systematic reviews of acupuncture published in Chinese journals found that less than half of these reviews reported testing for publication bias, and that the majority of these reviews were published in journals with impact factors of zero. A 2015 study comparing pre-registered records of acupuncture trials with their published results found that it was uncommon for such trials to be registered before the trial began. This study also found that selective reporting of results and changing outcome measures to obtain statistically significant results was common in this literature. Scientist and journalist Steven Salzberg identifies acupuncture and Chinese medicine generally as a focus for "fake medical journals" such as the Journal of Acupuncture and Meridian Studies and Acupuncture in Medicine. Safety Adverse events Acupuncture is generally safe when administered by an experienced, appropriately trained practitioner using clean-needle technique and sterile single-use needles. When improperly delivered it can cause adverse effects. Accidents and infections are associated with infractions of sterile technique or neglect on the part of the practitioner. To reduce the risk of serious adverse events after acupuncture, acupuncturists should be trained sufficiently. A 2009 overview of Cochrane reviews found acupuncture is not effective for a wide range of conditions. People with serious spinal disease, such as cancer or infection, are not good candidates for acupuncture. Contraindications to acupuncture (conditions that should not be treated with acupuncture) include coagulopathy disorders (e.g. hemophilia and advanced liver disease), warfarin use, severe psychiatric disorders (e.g. psychosis), and skin infections or skin trauma (e.g. burns). Further, electroacupuncture should be avoided at the spot of implanted electrical devices (such as pacemakers). A 2011 systematic review of systematic reviews (internationally and without language restrictions) found that serious complications following acupuncture continue to be reported. Between 2000 and 2009, ninety-five cases of serious adverse events, including five deaths, were reported. Many such events are not inherent to acupuncture but are due to malpractice of acupuncturists. This might be why such complications have not been reported in surveys of adequately trained acupuncturists. Most such reports originate from Asia, which may reflect the large number of treatments performed there or a relatively higher number of poorly trained Asian acupuncturists. Many serious adverse events were reported from developed countries. These included Australia, Austria, Canada, Croatia, France, Germany, Ireland, the Netherlands, New Zealand, Spain, Sweden, Switzerland, the UK, and the US. The number of adverse effects reported from the UK appears particularly unusual, which may indicate less under-reporting in the UK than other countries. Reports included 38 cases of infections and 42 cases of organ trauma. The most frequent adverse events included pneumothorax, and bacterial and viral infections. A 2013 review found (without restrictions regarding publication date, study type or language) 295 cases of infections; mycobacterium was the pathogen in at least 96%. Likely sources of infection include towels, hot packs or boiling tank water, and reusing reprocessed needles. Possible sources of infection include contaminated needles, reusing personal needles, a person's skin containing mycobacterium, and reusing needles at various sites in the same person. Although acupuncture is generally considered a safe procedure, a 2013 review stated that the reports of infection transmission increased significantly in the prior decade, including those of mycobacterium. Although it is recommended that practitioners of acupuncture use disposable needles, the reuse of sterilized needles is still permitted. It is also recommended that thorough control practices for preventing infection be implemented and adapted. English-language A 2013 systematic review of the English-language case reports found that serious adverse events associated with acupuncture are rare, but that acupuncture is not without risk. Between 2000 and 2011 the English-language literature from 25 countries and regions reported 294 adverse events. The majority of the reported adverse events were relatively minor, and the incidences were low. For example, a prospective survey of 34,000 acupuncture treatments found no serious adverse events and 43 minor ones, a rate of 1.3 per 1000 interventions. Another survey found there were 7.1% minor adverse events, of which 5 were serious, amid 97,733 acupuncture patients. The most common adverse effect observed was infection (e.g. mycobacterium), and the majority of infections were bacterial in nature, caused by skin contact at the needling site. Infection has also resulted from skin contact with unsterilized equipment or with dirty towels in an unhygienic clinical setting. Other adverse complications included five reported cases of spinal cord injuries (e.g. migrating broken needles or needling too deeply), four brain injuries, four peripheral nerve injuries, five heart injuries, seven other organ and tissue injuries, bilateral hand edema, epithelioid granuloma, pseudolymphoma, argyria, pustules, pancytopenia, and scarring due to hot-needle technique. Adverse reactions from acupuncture, which are unusual and uncommon in typical acupuncture practice, included syncope, galactorrhoea, bilateral nystagmus, pyoderma gangrenosum, hepatotoxicity, eruptive lichen planus, and spontaneous needle migration. A 2013 systematic review found 31 cases of vascular injuries caused by acupuncture, three causing death. Two died from pericardial tamponade and one was from an aortoduodenal fistula. The same review found vascular injuries were rare, bleeding and pseudoaneurysm were most prevalent. A 2011 systematic review (without restriction in time or language), aiming to summarize all reported case of cardiac tamponade after acupuncture, found 26 cases resulting in 14 deaths, with little doubt about cause in most fatal instances. The same review concluded that cardiac tamponade was a serious, usually fatal, though theoretically avoidable complication following acupuncture, and urged training to minimize risk. A 2012 review found that a number of adverse events were reported after acupuncture in the UK's National Health Service (NHS), 95% of which were not severe, though miscategorization and under-reporting may alter the total figures. From January 2009 to December 2011, 468 safety incidents were recognized within the NHS organizations. The adverse events recorded included retained needles (31%), dizziness (30%), loss of consciousness/unresponsive (19%), falls (4%), bruising or soreness at needle site (2%), pneumothorax (1%) and other adverse side effects (12%). Acupuncture practitioners should know, and be prepared to be responsible for, any substantial harm from treatments. Some acupuncture proponents argue that the long history of acupuncture suggests it is safe. However, there is an increasing literature on adverse events (e.g. spinal-cord injury). Acupuncture seems to be safe in people getting anticoagulants, assuming needles are used at the correct location and depth, but studies are required to verify these findings. Chinese, Korean, and Japanese-language A 2010 systematic review of the Chinese-language literature found numerous acupuncture-related adverse events, including pneumothorax, fainting, subarachnoid hemorrhage, and infection as the most frequent, and cardiovascular injuries, subarachnoid hemorrhage, pneumothorax, and recurrent cerebral hemorrhage as the most serious, most of which were due to improper technique. Between 1980 and 2009, the Chinese-language literature reported 479 adverse events. Prospective surveys show that mild, transient acupuncture-associated adverse events ranged from 6.71% to 15%. In a study with 190,924 patients, the prevalence of serious adverse events was roughly 0.024%. Another study showed a rate of adverse events requiring specific treatment of 2.2%, 4,963 incidences among 229,230 patients. Infections, mainly hepatitis, after acupuncture are reported often in English-language research, though are rarely reported in Chinese-language research, making it plausible that acupuncture-associated infections have been underreported in China. Infections were mostly caused by poor sterilization of acupuncture needles. Other adverse events included spinal epidural hematoma (in the cervical, thoracic and lumbar spine), chylothorax, injuries of abdominal organs and tissues, injuries in the neck region, injuries to the eyes, including orbital hemorrhage, traumatic cataract, injury of the oculomotor nerve and retinal puncture, hemorrhage to the cheeks and the hypoglottis, peripheral motor-nerve injuries and subsequent motor dysfunction, local allergic reactions to metal needles, stroke, and cerebral hemorrhage after acupuncture. A causal link between acupuncture and the adverse events cardiac arrest, pyknolepsy, shock, fever, cough, thirst, aphonia, leg numbness, and sexual dysfunction remains uncertain. The same review concluded that acupuncture can be considered inherently safe when practiced by properly trained practitioners, but the review also stated there is a need to find effective strategies to minimize the health risks. Between 1999 and 2010, the Korean-language literature contained reports of 1104 adverse events. Between the 1980s and 2002, the Japanese-language literature contained reports of 150 adverse events. Children and pregnancy Although acupuncture has been practiced for thousands of years in China, its use in pediatrics in the United States did not become common until the early 2000s. In 2007, the National Health Interview Survey (NHIS) conducted by the National Center For Health Statistics (NCHS) estimated that approximately 150,000 children had received acupuncture treatment for a variety of conditions. In 2008 a study determined that the use of acupuncture-needle treatment on children was "questionable" due to the possibility of adverse side-effects and the pain manifestation differences in children versus adults. The study also includes warnings against practicing acupuncture on infants, as well as on children who are over-fatigued, very weak, or have over-eaten. When used on children, acupuncture is considered safe when administered by well-trained, licensed practitioners using sterile needles; however, a 2011 review found there was limited research to draw definite conclusions about the overall safety of pediatric acupuncture. The same review found 279 adverse events, 25 of them serious. The adverse events were mostly mild in nature (e.g. bruising or bleeding). The prevalence of mild adverse events ranged from 10.1% to 13.5%, an estimated 168 incidences among 1,422 patients. On rare occasions adverse events were serious (e.g. cardiac rupture or hemoptysis); many might have been a result of substandard practice. The incidence of serious adverse events was 5 per one million, which included children and adults. When used during pregnancy, the majority of adverse events caused by acupuncture were mild and transient, with few serious adverse events. The most frequent mild adverse event was needling or unspecified pain, followed by bleeding. Although two deaths (one stillbirth and one neonatal death) were reported, there was a lack of acupuncture-associated maternal mortality. Limiting the evidence as certain, probable or possible in the causality evaluation, the estimated incidence of adverse events following acupuncture in pregnant women was 131 per 10,000. Although acupuncture is not contraindicated in pregnant women, some specific acupuncture points are particularly sensitive to needle insertion; these spots, as well as the abdominal region, should be avoided during pregnancy. Moxibustion and cupping Four adverse events associated with moxibustion were bruising, burns and cellulitis, spinal epidural abscess, and large superficial basal cell carcinoma. Ten adverse events were associated with cupping. The minor ones were keloid scarring, burns, and bullae; the serious ones were acquired hemophilia A, stroke following cupping on the back and neck, factitious panniculitis, reversible cardiac hypertrophy, and iron deficiency anemia. Risk of forgoing conventional medical care As with other alternative medicines, unethical or naïve practitioners may induce patients to exhaust financial resources by pursuing ineffective treatment. Professional ethics codes set by accrediting organizations such as the National Certification Commission for Acupuncture and Oriental Medicine require practitioners to make "timely referrals to other health care professionals as may be appropriate." Stephen Barrett states that there is a "risk that an acupuncturist whose approach to diagnosis is not based on scientific concepts will fail to diagnose a dangerous condition". Conceptual basis Traditional Acupuncture is a substantial part of traditional Chinese medicine (TCM). Early acupuncture beliefs relied on concepts that are common in TCM, such as a life force energy called qi. Qi was believed to flow from the body's primary organs (zang-fu organs) to the "superficial" body tissues of the skin, muscles, tendons, bones, and joints, through channels called meridians. Acupuncture points where needles are inserted are mainly (but not always) found at locations along the meridians. Acupuncture points not found along a meridian are called extraordinary points and those with no designated site are called "A-shi" points. In TCM, disease is generally perceived as a disharmony or imbalance in energies such as yin, yang, qi, xuĕ, zàng-fǔ, meridians, and of the interaction between the body and the environment. Therapy is based on which "pattern of disharmony" can be identified. For example, some diseases are believed to be caused by meridians being invaded with an excess of wind, cold, and damp. In order to determine which pattern is at hand, practitioners examine things like the color and shape of the tongue, the relative strength of pulse-points, the smell of the breath, the quality of breathing, or the sound of the voice. TCM and its concept of disease does not strongly differentiate between the cause and effect of symptoms. Purported scientific basis Many within the scientific community consider attempts to rationalize acupuncture in science to be quackery and pseudoscience. Academics Massimo Pigliucci and Maarten Boudry describe it as a "borderlands science" lying between science and pseudoscience. Rationalizations of traditional medicine It is a generally held belief within the acupuncture community that acupuncture points and meridians structures are special conduits for electrical signals, but no research has established any consistent anatomical structure or function for either acupuncture points or meridians. Human tests to determine whether electrical continuity was significantly different near meridians than other places in the body have been inconclusive. Scientific research has not supported the existence of qi, meridians, or yin and yang. A Nature editorial described TCM as "fraught with pseudoscience", with the majority of its treatments having no logical mechanism of action. Quackwatch states that "TCM theory and practice are not based upon the body of knowledge related to health, disease, and health care that has been widely accepted by the scientific community. TCM practitioners disagree among themselves about how to diagnose patients and which treatments should go with which diagnoses. Even if they could agree, the TCM theories are so nebulous that no amount of scientific study will enable TCM to offer rational care." Academic discussions of acupuncture still make reference to pseudoscientific concepts such as qi and meridians despite the lack of scientific evidence. Release of endorphins or adenosine Some modern practitioners support the use of acupuncture to treat pain, but have abandoned the use of qi, meridians, yin, yang and other mystical energies as an explanatory frameworks. The use of qi as an explanatory framework has been decreasing in China, even as it becomes more prominent during discussions of acupuncture in the US. Many acupuncturists attribute pain relief to the release of endorphins when needles penetrate, but no longer support the idea that acupuncture can affect a disease. Some studies suggest acupuncture causes a series of events within the central nervous system, and that it is possible to inhibit acupuncture's analgesic effects with the opioid antagonist naloxone. Mechanical deformation of the skin by acupuncture needles appears to result in the release of adenosine. The anti-nociceptive effect of acupuncture may be mediated by the adenosine A1 receptor. A 2014 review in Nature Reviews Cancer analyzed mouse studies that suggested acupuncture relieves pain via the local release of adenosine, which then triggered nearby A1 receptors. The review found that in those studies, because acupuncture "caused more tissue damage and inflammation relative to the size of the animal in mice than in humans, such studies unnecessarily muddled a finding that local inflammation can result in the local release of adenosine with analgesic effect." History Origins Acupuncture, along with moxibustion, is one of the oldest practices of traditional Chinese medicine. Most historians believe the practice began in China, though there are some conflicting narratives on when it originated. Academics David Ramey and Paul Buell said the exact date acupuncture was founded depends on the extent to which dating of ancient texts can be trusted and the interpretation of what constitutes acupuncture. Acupressure therapy was prevalent in India. Once Buddhism spread to China, the acupressure therapy was also integrated into common medical practice in China and it came to be known as acupuncture. The major points of Indian acupressure and Chinese acupuncture are similar to each other. According to an article in Rheumatology, the first documentation of an "organized system of diagnosis and treatment" for acupuncture was in Inner Classic of Huang Di (Huangdi Neijing) from about 100 BC. Gold and silver needles found in the tomb of Liu Sheng from around 100 BC are believed to be the earliest archaeological evidence of acupuncture, though it is unclear if that was their purpose. According to Plinio Prioreschi, the earliest known historical record of acupuncture is the Shiji ("Records of the Grand Historian"), written by a historian around 100 BC. It is believed that this text was documenting what was established practice at that time. Alternate theories The 5,000-year-old mummified body of Ötzi the Iceman was found with 15 groups of tattoos, many of which were located at points on the body where acupuncture needles are used for abdominal or lower back problems. Evidence from the body suggests Ötzi had these conditions. This has been cited as evidence that practices similar to acupuncture may have been practised elsewhere in Eurasia during the early Bronze Age; however, The Oxford Handbook of the History of Medicine calls this theory "speculative". It is considered unlikely that acupuncture was practised before 2000 BC. Acupuncture may have been practised during the Neolithic era, near the end of the Stone Age, using sharpened stones called Bian shi. Many Chinese texts from later eras refer to sharp stones called "plen", which means "stone probe", that may have been used for acupuncture purposes. The ancient Chinese medical text, Huangdi Neijing, indicates that sharp stones were believed at-the-time to cure illnesses at or near the body's surface, perhaps because of the short depth a stone could penetrate. However, it is more likely that stones were used for other medical purposes, such as puncturing a growth to drain its pus. The Mawangdui texts, which are believed to be from the 2nd century BC, mention the use of pointed stones to open abscesses, and moxibustion, but not for acupuncture. It is also speculated that these stones may have been used for bloodletting, due to the ancient Chinese belief that illnesses were caused by demons within the body that could be killed or released. It is likely bloodletting was an antecedent to acupuncture. According to historians Lu Gwei-djen and Joseph Needham, there is substantial evidence that acupuncture may have begun around 600 BC. Some hieroglyphs and pictographs from that era suggests acupuncture and moxibustion were practised. However, historians Lu and Needham said it was unlikely a needle could be made out of the materials available in China during this time period. It is possible that bronze was used for early acupuncture needles. Tin, copper, gold and silver are also possibilities, though they are considered less likely, or to have been used in fewer cases. If acupuncture was practised during the Shang dynasty (1766 to 1122 BC), organic materials like thorns, sharpened bones, or bamboo may have been used. Once methods for producing steel were discovered, it would replace all other materials, since it could be used to create a very fine, but sturdy needles. Lu and Needham noted that all the ancient materials that could have been used for acupuncture and which often produce archaeological evidence, such as sharpened bones, bamboo or stones, were also used for other purposes. An article in Rheumatology said that the absence of any mention of acupuncture in documents found in the tomb of Mawangdui from 198 BC suggest that acupuncture was not practised by that time. Belief systems Several different and sometimes conflicting belief systems emerged regarding acupuncture. This may have been the result of competing schools of thought. Some ancient texts referred to using acupuncture to cause bleeding, while others mixed the ideas of blood-letting and spiritual ch'i energy. Over time, the focus shifted from blood to the concept of puncturing specific points on the body, and eventually to balancing Yin and Yang energies as well. According to David Ramey, no single "method or theory" was ever predominantly adopted as the standard. At the time, scientific knowledge of medicine was not yet developed, especially because in China dissection of the deceased was forbidden, preventing the development of basic anatomical knowledge. It is not certain when specific acupuncture points were introduced, but the autobiography of Bian Que from around 400–500 BC references inserting needles at designated areas. Bian Que believed there was a single acupuncture point at the top of one's skull that he called the point "of the hundred meetings." Texts dated to be from 156–186 BC document early beliefs in channels of life force energy called meridians that would later be an element in early acupuncture beliefs. Ramey and Buell said the "practice and theoretical underpinnings" of modern acupuncture were introduced in The Yellow Emperor's Classic (Huangdi Neijing) around 100 BC. It introduced the concept of using acupuncture to manipulate the flow of life energy (qi) in a network of meridian (channels) in the body. The network concept was made up of acu-tracts, such as a line down the arms, where it said acupoints were located. Some of the sites acupuncturists use needles at today still have the same names as those given to them by the Yellow Emperor's Classic. Numerous additional documents were published over the centuries introducing new acupoints. By the 4th century AD, most of the acupuncture sites in use today had been named and identified. Early development in China Establishment and growth In the first half of the 1st century AD, acupuncturists began promoting the belief that acupuncture's effectiveness was influenced by the time of day or night, the lunar cycle, and the season. The 'science of the yin-yang cycles' ( ) was a set of beliefs that curing diseases relied on the alignment of both heavenly (tian) and earthly (di) forces that were attuned to cycles like that of the sun and moon. There were several different belief systems that relied on a number of celestial and earthly bodies or elements that rotated and only became aligned at certain times. According to Needham and Lu, these "arbitrary predictions" were depicted by acupuncturists in complex charts and through a set of special terminology. Acupuncture needles during this period were much thicker than most modern ones and often resulted in infection. Infection is caused by a lack of sterilization, but at that time it was believed to be caused by use of the wrong needle, or needling in the wrong place, or at the wrong time. Later, many needles were heated in boiling water, or in a flame. Sometimes needles were used while they were still hot, creating a cauterizing effect at the injection site. Nine needles were recommended in the Great Compendium of Acupuncture and Moxibustion from 1601, which may have been because of an ancient Chinese belief that nine was a magic number. Other belief systems were based on the idea that the human body operated on a rhythm and acupuncture had to be applied at the right point in the rhythm to be effective. In some cases a lack of balance between Yin and Yang were believed to be the cause of disease. In the 1st century AD, many of the first books about acupuncture were published and recognized acupuncturist experts began to emerge. The Zhen Jiu Jia Yi Jing, which was published in the mid-3rd century, became the oldest acupuncture book that is still in existence in the modern era. Other books like the Yu Gui Zhen Jing, written by the Director of Medical Services for China, were also influential during this period, but were not preserved. In the mid 7th century, Sun Simiao published acupuncture-related diagrams and charts that established standardized methods for finding acupuncture sites on people of different sizes and categorized acupuncture sites in a set of modules. Acupuncture became more established in China as improvements in paper led to the publication of more acupuncture books. The Imperial Medical Service and the Imperial Medical College, which both supported acupuncture, became more established and created medical colleges in every province. The public was also exposed to stories about royal figures being cured of their diseases by prominent acupuncturists. By time the Great Compendium of Acupuncture and Moxibustion was published during the Ming dynasty (1368–1644 AD), most of the acupuncture practices used in the modern era had been established. Decline By the end of the Song dynasty (1279 AD), acupuncture had lost much of its status in China. It became rarer in the following centuries, and was associated with less prestigious professions like alchemy, shamanism, midwifery and moxibustion. Additionally, by the 18th century, scientific rationality was becoming more popular than traditional superstitious beliefs. By 1757 a book documenting the history of Chinese medicine called acupuncture a "lost art". Its decline was attributed in part to the popularity of prescriptions and medications, as well as its association with the lower classes. In 1822, the Chinese Emperor signed a decree excluding the practice of acupuncture from the Imperial Medical Institute. He said it was unfit for practice by gentlemen-scholars. In China acupuncture was increasingly associated with lower-class, illiterate practitioners. It was restored for a time, but banned again in 1929 in favor of science-based Western medicine. Although acupuncture declined in China during this time period, it was also growing in popularity in other countries. International expansion Korea is believed to be the first country in Asia that acupuncture spread to outside of China. Within Korea there is a legend that acupuncture was developed by emperor Dangun, though it is more likely to have been brought into Korea from a Chinese colonial prefecture in 514 AD. Acupuncture use was commonplace in Korea by the 6th century. It spread to Vietnam in the 8th and 9th centuries. As Vietnam began trading with Japan and China around the 9th century, it was influenced by their acupuncture practices as well. China and Korea sent "medical missionaries" that spread traditional Chinese medicine to Japan, starting around 219 AD. In 553, several Korean and Chinese citizens were appointed to re-organize medical education in Japan and they incorporated acupuncture as part of that system. Japan later sent students back to China and established acupuncture as one of five divisions of the Chinese State Medical Administration System. Acupuncture began to spread to Europe in the second half of the 17th century. Around this time the surgeon-general of the Dutch East India Company met Japanese and Chinese acupuncture practitioners and later encouraged Europeans to further investigate it. He published the first in-depth description of acupuncture for the European audience and created the term "acupuncture" in his 1683 work De Acupunctura. France was an early adopter among the West due to the influence of Jesuit missionaries, who brought the practice to French clinics in the 16th century. The French doctor Louis Berlioz (the father of the composer Hector Berlioz) is usually credited with being the first to experiment with the procedure in Europe in 1810, before publishing his findings in 1816. By the 19th century, acupuncture had become commonplace in many areas of the world. Americans and Britons began showing interest in acupuncture in the early 19th century, although interest waned by mid-century. Western practitioners abandoned acupuncture's traditional beliefs in spiritual energy, pulse diagnosis, and the cycles of the moon, sun or the body's rhythm. Diagrams of the flow of spiritual energy, for example, conflicted with the West's own anatomical diagrams. It adopted a new set of ideas for acupuncture based on tapping needles into nerves. In Europe it was speculated that acupuncture may allow or prevent the flow of electricity in the body, as electrical pulses were found to make a frog's leg twitch after death. The West eventually created a belief system based on Travell trigger points that were believed to inhibit pain. They were in the same locations as China's spiritually identified acupuncture points, but under a different nomenclature. The first elaborate Western treatise on acupuncture was published in 1683 by Willem ten Rhijne. Modern era In China, the popularity of acupuncture rebounded in 1949 when Mao Zedong took power and sought to unite China behind traditional cultural values. It was also during this time that many Eastern medical practices were consolidated under the name traditional Chinese medicine (TCM). New practices were adopted in the 20th century, such as using a cluster of needles, electrified needles, or leaving needles inserted for up to a week. A lot of emphasis developed on using acupuncture on the ear. Acupuncture research organizations such as the International Society of Acupuncture were founded in the 1940s and 1950s and acupuncture services became available in modern hospitals. China, where acupuncture was believed to have originated, was increasingly influenced by Western medicine. Meanwhile, acupuncture grew in popularity in the US. The US Congress created the Office of Alternative Medicine in 1992 and the National Institutes of Health (NIH) declared support for acupuncture for some conditions in November 1997. In 1999, the National Center for Complementary and Alternative Medicine was created within the NIH. Acupuncture became the most popular alternative medicine in the US. Politicians from the Chinese Communist Party said acupuncture was superstitious and conflicted with the party's commitment to science. Communist Party Chairman Mao Zedong later reversed this position, arguing that the practice was based on scientific principles. In 1971, New York Times reporter James Reston published an article on his acupuncture experiences in China, which led to more investigation of and support for acupuncture. The US President Richard Nixon visited China in 1972. During one part of the visit, the delegation was shown a patient undergoing major surgery while fully awake, ostensibly receiving acupuncture rather than anesthesia. Later it was found that the patients selected for the surgery had both a high pain tolerance and received heavy indoctrination before the operation; these demonstration cases were also frequently receiving morphine surreptitiously through an intravenous drip that observers were told contained only fluids and nutrients. One patient receiving open heart surgery while awake was ultimately found to have received a combination of three powerful sedatives as well as large injections of a local anesthetic into the wound. After the National Institute of Health expressed support for acupuncture for a limited number of conditions, adoption in the US grew further. In 1972 the first legal acupuncture center in the US was established in Washington DC and in 1973 the American Internal Revenue Service allowed acupuncture to be deducted as a medical expense. In 2006, a BBC documentary Alternative Medicine filmed a patient undergoing open heart surgery allegedly under acupuncture-induced anesthesia. It was later revealed that the patient had been given a cocktail of anesthetics. In 2010, UNESCO inscribed "acupuncture and moxibustion of traditional Chinese medicine" on the UNESCO Intangible Cultural Heritage List following China's nomination. Adoption Acupuncture is most heavily practiced in China and is popular in the US, Australia, and Europe. In Switzerland, acupuncture has become the most frequently used alternative medicine since 2004. In the United Kingdom, a total of 4 million acupuncture treatments were administered in 2009. Acupuncture is used in most pain clinics and hospices in the UK. An estimated 1 in 10 adults in Australia used acupuncture in 2004. In Japan, it is estimated that 25 percent of the population will try acupuncture at some point, though in most cases it is not covered by public health insurance. Users of acupuncture in Japan are more likely to be elderly and to have a limited education. Approximately half of users surveyed indicated a likelihood to seek such remedies in the future, while 37% did not. Less than one percent of the US population reported having used acupuncture in the early 1990s. By the early 2010s, more than 14 million Americans reported having used acupuncture as part of their health care. In the US, acupuncture is increasingly () used at academic medical centers, and is usually offered through CAM centers or anesthesia and pain management services. Examples include those at Harvard University, Stanford University, Johns Hopkins University, and UCLA. CDC clinical practice guidelines from 2022 list acupuncture among the types of complementary and alternative medicines physicians should consider in preference to opioid prescription for certain kinds of pain. The use of acupuncture in Germany increased by 20% in 2007, after the German acupuncture trials supported its efficacy for certain uses. In 2011, there were more than one million users, and insurance companies have estimated that two-thirds of German users are women. As a result of the trials, German public health insurers began to cover acupuncture for chronic low back pain and osteoarthritis of the knee, but not tension headache or migraine. This decision was based in part on socio-political reasons. Some insurers in Germany chose to stop reimbursement of acupuncture because of the trials. For other conditions, insurers in Germany were not convinced that acupuncture had adequate benefits over usual care or sham treatments. Highlighting the results of the placebo group, researchers refused to accept a placebo therapy as efficient. Regulation There are various government and trade association regulatory bodies for acupuncture in the United Kingdom, the United States, Saudi Arabia, Australia, New Zealand, Japan, Canada, and in European countries and elsewhere. The World Health Organization recommends that before being licensed or certified, an acupuncturist receive 200 hours of specialized training if they are a physician and 2,500 hours for non-physicians; many governments have adopted similar standards. In Hong Kong, the practice of acupuncture is regulated by the Chinese Medicine Council that was formed in 1999 by the Legislative Council. It includes a licensing exam and registration, as well as degree courses approved by the board. Canada has acupuncture licensing programs in the provinces of British Columbia, Ontario, Alberta and Quebec; standards set by the Chinese Medicine and Acupuncture Association of Canada are used in provinces without government regulation. Regulation in the US began in the 1970s in California, which was eventually followed by every state but Wyoming and Idaho. Licensing requirements vary greatly from state to state. The needles used in acupuncture are regulated in the US by the Food and Drug Administration. In some states acupuncture is regulated by a board of medical examiners, while in others by the board of licensing, health or education. In Japan, acupuncturists are licensed by the Minister of Health, Labour and Welfare after passing an examination and graduating from a technical school or university. In Australia, the Chinese Medicine Board of Australia regulates acupuncture, among other Chinese medical traditions, and restricts the use of titles like 'acupuncturist' to registered practitioners only. The practice of Acupuncture in New Zealand in 1990 acupuncture was included into the Governmental Accident Compensation Corporation (ACC) Act. This inclusion granted qualified and professionally registered acupuncturists to provide subsidised care and treatment to citizens, residents, and temporary visitors for work or sports related injuries that occurred within the country of New Zealand. The two bodies for the regulation of acupuncture and attainment of ACC treatment provider status in New Zealand are Acupuncture NZ, and The New Zealand Acupuncture Standards Authority. At least 28 countries in Europe have professional associations for acupuncturists. In France, the Académie Nationale de Médecine (National Academy of Medicine) has regulated acupuncture since 1955. See also Notes References Bibliography Further reading External links Alternative medicine Chinese inventions Energy therapies Pain management Pseudoscience Traditional Chinese medicine	13
Julia Agrippina (6 November AD 15 – 23 March AD 59), also referred to as Agrippina the Younger, was Roman empress from 49 to 54 AD, the fourth wife and niece of Emperor Claudius, and the mother of Nero. Agrippina was one of the most prominent women in the Julio-Claudian dynasty. She was the daughter of the Roman general Germanicus and Agrippina the Elder, granddaughter of Augustus (the first Roman emperor). Her father, Germanicus, was the nephew and heir apparent of the second emperor, Tiberius. Agrippina's brother Caligula became emperor in 37 AD. After Caligula was assassinated in 41 AD, Germanicus' brother Claudius took the throne. Agrippina married Claudius in 49 AD. Agrippina functioned as a behind-the-scenes advisor in the affairs of the Roman state via powerful political ties. She maneuvered her son Nero into the line of succession. Claudius became aware of her plotting, but died in 54; it was rumoured that Agrippina poisoned him. Agrippina exerted a commanding influence in the early years of Nero's reign, but in 59 she was killed. Both ancient and modern sources describe Agrippina's personality as ruthless, ambitious, violent and domineering. Physically, she was a beautiful and reputable woman; according to Pliny the Elder, she had a double canine in her upper right jaw, a sign of good fortune. Family Agrippina was the first daughter and fourth living child of Agrippina the Elder and Germanicus. She had three elder brothers, Nero Caesar, Drusus Caesar, and the future emperor Caligula, and two younger sisters, Julia Drusilla and Julia Livilla. Agrippina's two eldest brothers and her mother were victims of the intrigues of the Praetorian Prefect Lucius Aelius Sejanus. She was the namesake of her mother. Agrippina the Elder was remembered as a modest and heroic matron, who was the second daughter and fourth child of Julia the Elder and the statesman Marcus Vipsanius Agrippa. The father of Julia the Elder was the emperor Augustus, and Julia was his only natural child from his second marriage to Scribonia, who had close blood relations with Pompey the Great and Lucius Cornelius Sulla. Germanicus, Agrippina's father, was a very popular general and politician. His mother was Antonia Minor and his father was the general Nero Claudius Drusus. He was Antonia Minor's first child. Germanicus had two younger siblings; a sister, named Livilla, and a brother, the future emperor Claudius. Claudius was Agrippina's paternal uncle and third husband. Antonia Minor was a daughter to Octavia the Younger by her second marriage to triumvir Mark Antony, and Octavia was the second eldest sister and full-blooded sister of Augustus. Germanicus' father, Drusus the Elder, was the second son of the Empress Livia Drusilla by her first marriage to praetor Tiberius Nero, and was the emperor Tiberius's younger brother and Augustus's stepson. In the year 9, Augustus ordered and forced Tiberius to adopt Germanicus, who happened to be Tiberius's nephew, as his son and heir. Germanicus was a favourite of his great-uncle Augustus, who hoped that Germanicus would succeed his uncle Tiberius, who was Augustus's own adopted son and heir. This in turn meant that Tiberius was also Agrippina's adoptive grandfather in addition to her paternal great-uncle. Birth and early life Agrippina was born on 6 November in AD 15, or possibly 14, at Oppidum Ubiorum, a Roman outpost on the Rhine River located in present-day Cologne, Germany. A second sister Julia Drusilla was born on 16 September 16, also in Germany. As a small child, Agrippina travelled with her parents throughout Germany (15–16) until she and her siblings (apart from Caligula) returned to Rome to live with and be raised by their paternal grandmother Antonia. Her parents departed for Syria in 18 to conduct official duties, and, according to Tacitus, the third and youngest sister was born en route on the island of Lesbos, namely Julia Livilla, probably on March 18. In October of AD 19, Germanicus died suddenly in Antioch (modern Antakya, Turkey). Germanicus' death caused much public grief in Rome, and gave rise to rumours that he had been murdered by Gnaeus Calpurnius Piso and Munatia Plancina on the orders of Tiberius, as his widow Agrippina the Elder returned to Rome with his ashes. Agrippina the Younger was thereafter supervised by her mother, her paternal grandmother Antonia Minor, and her great-grandmother, Livia, all of them notable, influential, and powerful figures from whom she learnt how to survive. She lived on the Palatine Hill in Rome. Her great-uncle Tiberius had already become emperor and the head of the family after the death of Augustus in 14. Marriage to Gnaeus Domitius Ahenobarbus After her thirteenth birthday in 28, Tiberius arranged for Agrippina to marry her paternal first cousin once removed Gnaeus Domitius Ahenobarbus and ordered the marriage to be celebrated in Rome. Domitius came from a distinguished family of consular rank. Through his mother Antonia Major, Domitius was a great nephew of Augustus, first cousin to Claudius, and first cousin once removed to Agrippina and Caligula. He had two sisters; Domitia Lepida the Elder and Domitia Lepida the Younger. Domitia Lepida the Younger was the mother of the Empress Valeria Messalina. Antonia Major was the elder sister to Antonia Minor, and the first daughter of Octavia Minor and Mark Antony. According to Suetonius, Domitius was a wealthy man with a despicable and dishonest character, who, according to Suetonius, was "a man who was in every aspect of his life detestable" and served as consul in 32. Agrippina and Domitius lived between Antium and Rome. Not much is known about the relationship between them. Reign of Caligula Public role and political intrigues Tiberius died on March 16, AD 37, and Agrippina's only surviving brother, Caligula, became the new emperor. Being the emperor's sister gave Agrippina some influence. Agrippina and her younger sisters Julia Drusilla and Julia Livilla received various honours from their brother, which included but were not limited to receiving the rights of the Vestal Virgins, such as the freedom to view public games from the upper seats in the stadium; being honoured with a new type of coinage, depicting images of Caligula and his sisters on opposite faces; having their names added to motions, including loyalty oaths (e.g., "I will not value my life or that of my children less highly than I do the safety of the Emperor and his sisters") and consular motions (e.g., "Good fortune attend to the Emperor and his sisters)". Around the time that Tiberius died, Agrippina had become pregnant. Domitius had acknowledged the paternity of the child. On December 15, AD 37, in the early morning, in Antium, Agrippina gave birth to a son. Agrippina and Domitius named their son Lucius Domitius Ahenobarbus, after Domitius' recently deceased father. This child would grow up to become the emperor Nero. Nero was Agrippina's only natural child. Suetonius states that Domitius was congratulated by friends on the birth of his son, whereupon he replied "I don't think anything produced by me and Agrippina could possibly be good for the state or the people". Caligula and his sisters were accused of having incestuous relationships. On June 10, AD 38, Drusilla died, possibly of a fever, rampant in Rome at the time. He was particularly fond of Drusilla, claiming to treat her as he would his own wife, even though Drusilla had a husband. Following her death Caligula showed no special love or respect toward the surviving sisters and was said to have gone insane. In 39, Agrippina and Livilla, with their maternal cousin, Drusilla's widower Marcus Aemilius Lepidus, were involved in a failed plot to murder Caligula, a plot known as the Plot of the Three Daggers, which was to make Lepidus the new emperor. Lepidus, Agrippina and Livilla were accused of being lovers. Not much is known concerning this plot and the reasons behind it. At the trial of Lepidus, Caligula felt no compunction about denouncing them as adulteresses, producing handwritten letters discussing how they were going to kill him. The three were found guilty as accessories to the crime. Exile Lepidus was executed. According to the fragmentary inscriptions of the Arval Brethren, Agrippina was forced to carry the urn of Lepidus' ashes back to Rome. Agrippina and Livilla were exiled by their brother to the Pontine Islands. Caligula sold their furniture, jewellery, slaves and freedmen. In January of AD 40, Domitius died of edema (dropsy) at Pyrgi. Lucius had gone to live with his second paternal aunt Domitia Lepida the Younger after Caligula had taken his inheritance away from him. Caligula, his wife Milonia Caesonia and their daughter Julia Drusilla were murdered on January 24, 41. Agrippina's paternal uncle, Claudius, brother of her father Germanicus, became the new Roman emperor. Reign of Claudius Return from exile Claudius lifted the exiles of Agrippina and Livilla. Livilla returned to her husband, while Agrippina was reunited with her estranged son. After the death of her first husband, Agrippina tried to make shameless advances to the future emperor Galba, who showed no interest in her and was devoted to his wife Aemilia Lepida. On one occasion, Galba's mother-in-law gave Agrippina a public reprimand and a slap in the face before a whole bevy of married women. Claudius had Lucius' inheritance reinstated. Lucius became more wealthy despite his youth shortly after Gaius Sallustius Crispus Passienus divorced Lucius' aunt, Domitia Lepida the Elder (Lucius' first paternal aunt) so that Crispus could marry Agrippina. They married, and Crispus became a step-father to Lucius. Crispus was a prominent, influential, witty, wealthy and powerful man, who served twice as consul. He was the adopted grandson and biological great-great-nephew of the historian Sallust. Little is known on their relationship, but Crispus soon died and left his estate to Nero. In the first years of Claudius' reign, Claudius was married to the infamous Empress Valeria Messalina. Although Agrippina was very influential, she kept a very low profile and stayed away from the imperial palace and the court of the emperor. Messalina was Agrippina's paternal second cousin. Among the victims of Messalina's intrigues were Agrippina's surviving sister Livilla, who was charged with having adultery with Seneca the Younger. Seneca was later called back from exile to be a tutor to Nero. Messalina considered Agrippina's son a threat to her son's position and sent assassins to strangle Lucius during his siesta. The assassins left after they saw a snake beneath Lucius' pillow, considering it as bad omen. It was, however, only a sloughed-off snake-skin in his bed, near his pillow. By Agrippina's order, the serpent's skin was enclosed in a bracelet that the young Nero wore on his right arm. In 47, Crispus died, and at his funeral, the rumour spread around that Agrippina poisoned Crispus to gain his estate. After being widowed a second time, Agrippina was left very wealthy. Later that year at the Secular Games, at the performance of the Troy Pageant, Messalina attended the event with her son Britannicus. Agrippina was also present with Lucius. Agrippina and Lucius received greater applause from the audience than Messalina and Britannicus did. Many people began to show pity and sympathy to Agrippina, due to the unfortunate circumstances in her life. Marriage to Claudius After Messalina was executed in 48 for conspiring with Gaius Silius to overthrow her husband, Claudius considered marrying for the fourth time. Around this time, Agrippina became the mistress to one of Claudius' advisers, the Greek freedman, Marcus Antonius Pallas. At that time Claudius' advisers were discussing which noblewoman Claudius should marry. Claudius had a reputation that he was easily persuaded. In more recent times, it has been suggested that the Senate may have pushed for the marriage between Agrippina and Claudius to end the feud between the Julian and Claudian branches. This feud dated back to Agrippina's mother's actions against Tiberius after the death of Germanicus, actions which Tiberius had gladly punished. Claudius made references to her in his speeches: "my daughter and foster child, born and bred, in my lap, so to speak". When Claudius decided to marry her, he persuaded a group of senators that the marriage should be arranged in the public interest. In Roman society, an uncle (Claudius) marrying his niece (Agrippina) was considered incestuous and immoral. Agrippina and Claudius married on New Year's Day, 49. This marriage caused widespread disapproval. This may have been a part of Agrippina's plan to make her son Lucius the new emperor. Her marriage to Claudius was not based on love, but on power. She quickly eliminated her rival Lollia Paulina. Shortly after marrying Claudius, Agrippina persuaded the emperor to charge Paulina with black magic. Claudius stipulated that Paulina did not receive a hearing and her property was confiscated. She left Italy, but Agrippina was unsatisfied. Allegedly on Agrippina's orders, Paulina committed suicide. In the months leading up to her marriage to Claudius, Agrippina's maternal second cousin, the praetor Lucius Junius Silanus Torquatus, was betrothed to Claudius' daughter Claudia Octavia. This betrothal was broken off in 48, when Agrippina, scheming with the consul Lucius Vitellius the Elder, the father of the future emperor Aulus Vitellius, falsely accused Silanus of incest with his sister Junia Calvina. Agrippina did this hoping to secure a marriage between Octavia and her son. Consequently, Claudius broke off the engagement and forced Silanus to resign from public office. Silanus committed suicide on the day that Agrippina married her uncle, and Calvina was exiled from Italy in early 49. Calvina was called back from exile after the death of Agrippina. Towards the end of 54, Agrippina would order the murder of Silanus' eldest brother Marcus Junius Silanus Torquatus without Nero's knowledge, so that he would not seek revenge against her over his brother's death. Empress of Rome On the day that Agrippina married her uncle Claudius as her third husband/his fourth wife, she became empress. She also was a stepmother to Claudia Antonia, Claudius' daughter and only child from his second marriage to Aelia Paetina, and to the young Claudia Octavia and Britannicus, Claudius' children with Valeria Messalina. Agrippina removed or eliminated anyone from the palace or the imperial court whom she thought was loyal and dedicated to the memory of the late Messalina. She also eliminated or removed anyone whom she considered was a potential threat to her position and the future of her son, one of her victims being Lucius' second paternal aunt and Messalina's mother Domitia Lepida the Younger. Griffin describes how Agrippina "had achieved this dominant position for her son and herself by a web of political alliances," which included Claudius chief secretary and bookkeeper Pallas, his doctor Xenophon, and Afranius Burrus, the head of the Praetorian Guard (the imperial bodyguard), who owed his promotion to Agrippina. Neither ancient nor modern historians of Rome have doubted that Agrippina had her eye on securing the throne for Nero from the very day of the marriage—if not earlier. Dio Cassius observation seems to bear that out: "As soon as Agrippina had come to live in the palace she gained complete control over Claudius." In 49, Agrippina was seated on a dais at a parade of captives when their leader the Celtic King Caratacus bowed before her with the same homage and gratitude as he accorded the emperor. In 50, Agrippina was granted the honorific title of Augusta. She was only the third Roman woman (Livia Drusilla and Antonia Minor received this title) and only the second living Roman woman (the first being Livia) to receive this title. In her capacity as Augusta, Agrippina quickly became a trusted advisor to Claudius, and by AD 54, she exerted a considerable influence over the decisions of the emperor. Statues of her were erected in many cities across the Empire, her face appeared on coins, and in the Senate, her followers were advanced with public offices and governorships. However this privileged position caused resentment among the senatorial class and the imperial family. She went to a place outside the imperial court and listened to the Senate from behind the scenes, and even Claudius allowed her to be a separate court and decide on empire matters. Agrippina even signed government documents and officially dealt with foreign ambassadors. She also claimed auctoritas (power of commanding) and Autokrateira (self-ruler as empress) in front of the Senate, the people and the army. Also that year, Claudius had founded a Roman colony and called the colony Colonia Claudia Ara Agrippinensis or Agrippinensium, today known as Cologne, after Agrippina who was born there. This colony was the only Roman colony to be named after a Roman woman. In 51, she was given a carpentum which she used. A carpentum was a sort of ceremonial carriage usually reserved for priests, such as the Vestal Virgins, and sacred statues. That same year she appointed Sextus Afranius Burrus as the head of the Praetorian Guard, replacing the previous head of the Praetorian Guard, Rufrius Crispinus. She assisted Claudius in administering the empire and became very wealthy and powerful. Ancient sources claim that Agrippina successfully influenced Claudius into adopting her son and making him his successor. Lucius Domitius Ahenobarbus was adopted by his great maternal uncle and stepfather in 50. Lucius' name was changed to Nero Claudius Caesar Drusus Germanicus and he became Claudius's adopted son, heir and recognised successor. Agrippina and Claudius betrothed Nero to his step sister Claudia Octavia, and Agrippina arranged to have Seneca the Younger return from exile to tutor the future emperor. Claudius chose to adopt Nero because of his Julian and Claudian lineage. Agrippina deprived Britannicus of his heritage and further isolated him from his father and succession for the throne in every way possible. For instance, in 51, Agrippina ordered the execution of Britannicus' tutor Sosibius because he had confronted her and was outraged by Claudius' adoption of Nero and his choice of Nero as successor, instead of choosing his own son Britannicus. Nero and Octavia were married on June 9, 53. Claudius later repented of marrying Agrippina and adopting Nero, began to favour Britannicus, and started preparing him for the throne. His actions allegedly gave Agrippina a motive to eliminate Claudius. The ancient sources say she poisoned Claudius on October 13, 54 (a Sunday) with a plate of deadly mushrooms at a banquet, thus enabling Nero to quickly take the throne as emperor. Accounts vary wildly with regard to this private incident and according to more modern sources, it is possible that Claudius died of natural causes; Claudius was 63 years old. In the aftermath of Claudius's death, Agrippina, who initially kept the death secret, tried to consolidate power, and immediately ordered that the palace and the capital be sealed. All the gates were blockaded and exit of the capital forbidden and she introduced Nero first to the soldiers and then to the senators as emperor. Reign of Nero Relationship with Nero Nero was raised to emperor and Agrippina was named a priestess of the cult of the deified Claudius. She now attempted to use her son's youth to participate in the rule of the Roman Empire. She enjoyed imperial prerogatives: holding court with the emperor by her side, being allowed to visit senate meetings from behind a curtain, and appearing as a partner to her son in the royal coins and statues. The historian Tacitus depicts her as attempting a diarchy with her son when she demanded that the Praetorian Guard pledge their loyalty to her. She was also said to have tried to participate in her son's meeting with Armenian ambassadors until Seneca and Burrus stopped her. In year one of Nero's reign, Agrippina guided her 17-year-old son in his rule but started losing influence over Nero when he began to have an affair with the freed woman Claudia Acte, which Agrippina strongly disapproved of and violently scolded him for. Agrippina began to support Britannicus in her possible attempt to make him emperor, or to threaten Nero. The panicking emperor decided on whether to eliminate his mother or his step-brother. Soon, Nero had Britannicus secretly poisoned during his own banquet in February 55. The power struggle between Agrippina and her son had begun. Agrippina between 56 and 58 became very watchful and had a critical eye over her son. In 56, Agrippina was forced out of the palace by her son to live in the imperial residence. However, some degree of Agrippina's influence over her son still lasted several more years, and they are considered the best years of Nero's reign. But their relationship grew more hostile and Nero gradually deprived his mother of honours and powers, and even removed her Roman and German bodyguards. Nero even threatened his mother that he would abdicate the throne and would go to live on the Greek Island of Rhodes, a place where Tiberius had lived after divorcing Julia the Elder. Pallas also was dismissed from the court. The fall of Pallas and the opposition of Burrus and Seneca to Agrippina contributed to her scaling down of authority. In mid-56, she was forced out of everyday and active participation in the governance of Rome. While Agrippina lived in her residence or when she went on short visits to Rome, Nero sent people to annoy her. Although living in Misenum, she was always hailed as "Augusta", and Agrippina and Nero would see each other on short visits. In late 58, Agrippina and a group of soldiers and senators were accused of attempting to overthrow Nero, and it was said they planned to move with Gaius Rubellius Plautus. In addition, she revealed Nero's relationship with Poppaea Sabina. Death and aftermath The circumstances that surround Agrippina's death are uncertain due to historical contradictions and anti-Nero bias. All surviving stories of Agrippina's death contradict themselves and each other, and are generally fantastical. Tacitus's account According to Tacitus, in 58, Nero became involved with the noble woman Poppaea Sabina. She taunted him for being a "mummy's boy." She also convinced him of the autonomy of any other emperor. With the reasoning that a divorce from Octavia and a marriage to Poppaea was not politically feasible with Agrippina alive, Nero decided to kill Agrippina. Yet, Nero did not marry Poppaea until 62, calling into question this motive. Additionally, Suetonius reveals that Poppaea's husband, Otho, was not sent away by Nero until after Agrippina's death in 59, making it highly unlikely that already married Poppaea would be pressing Nero. Some modern historians theorise that Nero's decision to kill Agrippina was prompted by her plot to replace him with either Gaius Rubellius Plautus (Nero's maternal second cousin) or Britannicus (Claudius' biological son). Tacitus claims that Nero considered poisoning or stabbing her, but felt these methods were too difficult and suspicious, so he settled on – after the advice of his former tutor Anicetus – building a self-sinking boat. Though aware of the plot, Agrippina embarked on this boat and was nearly crushed by a collapsing lead ceiling only to be saved by the side of a sofa breaking the ceiling's fall. Though the collapsing ceiling missed Agrippina, it crushed her attendant who was outside by the helm. The boat failed to sink from the lead ceiling, so the crew then sank the boat, but Agrippina swam to shore. Her friend, Acerronia Polla, was attacked by oarsmen while still in the water, and was either bludgeoned to death or drowned, since she was exclaiming that she was Agrippina, with the intention of being saved. She did not know, however, that this was an assassination attempt, not a mere accident. Agrippina was met at the shore by crowds of admirers. News of Agrippina's survival reached Nero so he sent three assassins to kill her. Suetonius's account Suetonius says that Agrippina's "over-watchful" and "over-critical" eye that she kept over Nero drove him to murdering her. After months of attempting to humiliate her by depriving her of her power, honour, and bodyguards, he also expelled her from the Palatine, followed by the people he sent to "pester" her with lawsuits and "jeers and catcalls". When he eventually turned to murder, he first tried poison, three times in fact. She prevented her death by taking the antidote in advance. Afterwards, he rigged up a machine in her room which would drop her ceiling tiles onto her as she slept, but she once again escaped her death after she received word of the plan. Nero's final plan was to get her in a boat which would collapse and sink. He sent her a friendly letter asking to reconcile and inviting her to celebrate the Quinquatrus at Baiae with him. He arranged an "accidental" collision between her galley and one of his captains. When returning home, he offered her his collapsible boat, as opposed to her damaged galley. The next day, Nero received word of her survival after the boat sank from her freedman Agermus. Panicking, Nero ordered a guard to "surreptitiously" drop a blade behind Agermus and Nero immediately had him arrested on account of attempted murder. Nero ordered the assassination of Agrippina. He made it look as if Agrippina had committed suicide after her plot to kill Nero had been uncovered. Suetonius says that after Agrippina's death, Nero examined Agrippina's corpse and discussed her good and bad points. Nero also believed Agrippina to haunt him after her death. Cassius Dio's account The tale of Cassius Dio is also somewhat different. It starts again with Poppaea as the motive behind the murder. Nero designed a ship that would open at the bottom while at sea. Agrippina was put aboard and after the bottom of the ship opened up, she fell into the water. Agrippina swam to shore so Nero sent an assassin to kill her. Nero then claimed Agrippina had plotted to kill him and committed suicide. Her reputed last words, uttered as the assassin was about to strike, were "Smite my womb", the implication here being she wished to be destroyed first in that part of her body that had given birth to so "abominable a son." Burial After Agrippina's death, Nero viewed her corpse and commented how beautiful she was, according to some. Her body was cremated that night on a dining couch. At his mother's funeral, Nero was witless, speechless and rather scared. When the news spread that Agrippina had died, the Roman army, senate and various people sent him letters of congratulations that he had been saved from his mother's plots. Aftermath During the remainder of Nero's reign, Agrippina's grave was not covered or enclosed. Her household later on gave her a modest tomb in Misenum. Nero would have his mother's death on his conscience. He felt so guilty he would sometimes have nightmares about his mother. He even saw his mother's ghost and got Persian magicians to ask her for forgiveness. Years before she died, Agrippina had visited astrologers to ask about her son's future. The astrologers had rather accurately predicted that her son would become emperor and would kill her. She replied, "Let him kill me, provided he becomes emperor," according to Tacitus. Agrippina's alleged victims 47 Passienus Crispus: Agrippina's 2nd husband, poisoned (Suet.). 48 Messalina: Because of the competition for the emperor's successor 49 Lollia Paulina: as she was a rival for Claudius' hand in marriage as proposed by the freedman Callistus (Tac. & Dio). Lucius Silanus: betrothed to Octavia, Claudius' daughter before his marriage of Agrippina. He committed suicide on their wedding day. Sosibius: Britannicus' tutor, executed for plotting against Nero. Calpurnia: banished (Tac.) and/or executed (Dio) because Claudius had commented on her beauty. 53 Statilius Taurus: forced to commit suicide because Agrippina wanted his gardens (Tac.). 54 Claudius: her husband, poisoned (Tac., Sen., Juv., Suet., Dio). Domitia Lepida: mother of Messalina, executed (Tac.). Marcus Junius Silanus: a potential rival to Nero, poisoned (Pliny, Tac., Dio). Cadius Rufus: executed on the charge of extortion. Tiberius Claudius Narcissus: Because of the competition with Agrippina. Legacy and cultural references Memoirs Agrippina left memoirs of her life and the misfortunes of her family, which Tacitus used when writing his Annals, but they have not survived. In music and literature She is remembered in De Mulieribus Claris, a collection of biographies of historical and mythological women by the Florentine author Giovanni Boccaccio, composed in 136162. It is notable as the first collection devoted exclusively to biographies of women in western literature. Octavia, a Roman tragedy written during the Flavian period Agrippina: Trauerspiel (1665), a German baroque tragedy by Daniel Casper von Lohenstein G.F. Handel's 1709 opera Agrippina with a libretto by Vincenzo Grimani Empress of Rome (1978), a novel by Robert DeMaria (Vineyard Press edition, 2001, ) Agrippina is considered to be the founder of Cologne and is still symbolised there today by the robe of the virgin of the Cologne triumvirate. In the sculpture programme of the Cologne town hall tower, a figure by Heribert Calleen was dedicated to Agrippina on the ground floor. In film, television, and radio The 1911 Italian film Agrippina I, Claudius (1976) played by Barbara Young (here called Agrippinilla). Caligula (1979) and also Messalina, Messalina (1977) played by Lori Wagner. Caligula and Messalina (1981) played by Françoise Blanchard. A.D. (1985 miniseries) played by Ava Gardner. Boudica (2003) played by Frances Barber. Imperium: Nero (2005) played by Laura Morante. Ancients Behaving Badly (2009), History Channel documentary. Episode Nero. Roman Empire (2016), Netflix, played by Teressa Liane. Agrippina the Younger was portrayed by Betty Lou Gerson in the August 31, 1953, episode of the CBS radio program Crime Classics that was entitled "Your Loving Son, Nero." The episode chronicles the killing of Agrippina by her son Nero who was portrayed by William Conrad. Mio Figlio Nerone (1956) played by Gloria Swanson Perspectives on Agrippina's personality Ancient Most ancient Roman sources are quite critical of Agrippina the Younger. Tacitus considered her vicious and had a strong disposition against her. Other sources are Suetonius and Cassius Dio. Modern Girod, Virginie, Agrippine, sexe, crimes et pouvoir dans la Rome impériale , Paris, Tallandier, 2015, 300 p. Minaud, Gérard, Les vies de 12 femmes d'empereur romain – Devoirs, Intrigues & Voluptés , Paris, L'Harmattan, 2012, ch. 3, La vie d'Agrippine, femme de Claude, p. 65-96. E. Groag, A. Stein, L. Petersen, Prosopographia Imperii Romani saeculi I, II et III, Berlin, 1933 Scullard: A critical view of Agrippina, suggesting she was ambitious and unscrupulous and a depraved sexual psychopath. "Agrippina struck down a series of victims; no man or woman was safe if she suspected rivalry or desired their wealth." Ferrero: Sympathetic and understanding, suggesting Agrippina has been judged harshly by history. Suggesting her marriage to Claudius was to a weak emperor who was, because of his hesitations and terrors, a threat to the imperial authority and government. She saw it her duty to compensate for the innumerable deficiencies of her strange husband through her own intelligence and strength of will. Pages 212ff.; 276ff. Barrett: A reasonable view, comparing Scullard's criticisms to Ferrero's apologies. (See Barrett, Anthony A., Agrippina: Sex, Power and Politics in the Early Roman Empire, Yale University Press, New Haven, 1996.) Annelise Freisenbruch, The first ladies of Rome McDaniel, W. B. "Bauli the Scene of the Murder of Agrippina". The Classical Quarterly, Vol. 4, No. 2 (April 1910) Salmonson, Jessica Amanda. (1991) The Encyclopedia of Amazons. Paragon House. Pages 4–5. Donna Hurley, Agrippina the Younger (Wife of Claudius). L. Foubert, Agrippina. Keizerin van Rome, Leuven, 2006. Opera by G. F. Handel: Agrippina See also List of unsolved murders Notes References Tacitus, Annales xii.1–10, 64–69, xiv.1–9 Suetonius, De vita Caesarum – Claudius v.44 and Nero vi.5.3, 28.2, 34.1–4 15 births 59 deaths 1st-century executions 1st-century Roman empresses Augustae Children of Germanicus Family of Nero Female murder victims Incest Julii Caesares Murdered ancient Roman empresses People from Cologne Unsolved murders in Italy Wives of Claudius	6
The Akkadian Empire () was the first ancient empire of Mesopotamia, succeeding the long-lived civilization of Sumer. Centered on the city of Akkad () and its surrounding region, the empire would unite Akkadian and Sumerian speakers under one rule and exercised significant influence across Mesopotamia, the Levant, and Anatolia, sending military expeditions as far south as Dilmun and Magan (modern Saudi Arabia, Bahrain, and Oman) in the Arabian Peninsula. The Akkadian Empire reached its political peak between the 24th and 22nd centuries BC, following the conquests by its founder Sargon of Akkad. Under Sargon and his successors, the Akkadian language was briefly imposed on neighboring conquered states such as Elam and Gutium. Akkad is sometimes regarded as the first empire in history, though the meaning of this term is not precise, and there are earlier Sumerian claimants. Sources Contemporary sources Epigraphic sources from the Sargonic (Akkadian Empire) period are in relatively short supply, partly because the capital Akkad, like the capitals of the later Mitanni and Sealand, has not yet been located, though there has been much speculation. Some cuneiform tablets have been excavated at cities under Akkadian Empire control like Eshnunna and Tell Agrab. Other tablets, lamentably, have become available on the antiquities market and are held in museums and private collections such as those from the Akkadian governor in Adab. Internal evidence allows their dating to the Sargonic period and sometimes to the original location. Archives are especially important to historians and only a few have become available. The Me-sag Archive, which commenced publication in 1958, is considered one of the most significant collections. The tablets, about 500 in number with about half published, are held primarily at the Babylonian Collection of the Yale University and Baghdad Museum with a few others scattered about. The tablets date to the period of late in the reign of Naram-Sin to early in the reign of Shar-kali-shari. They are believed to be from a town between Umma and Lagash and Me-sag to be the governor of Umma. An archive of 47 tablets was found at the excavation of Tell el-Suleimah in the Hamrin Basin. Various royal inscriptions by the Akkadian rulers have also been found. Most of the original examples are short, or very fragmentary like the Victory Stele of Naram-Sin and the Sargonic victory stele from Telloh. A few longer ones are known because of later copies made, often from the much later Old Babylonian period. While these are assumed to be mostly accurate, it is difficult to know if they had been edited to reflect current political conditions. One of the longer surviving examples is the Bassetki Statue, the copper base of a Narim-Sin statue: A number of fragments of royal statues of Manishtushu all bearing portions of a "standard inscription". Aside from a few minor short inscriptions this is the only known contemporary source for this ruler. An excerpt: Before the Akkadian Empire, calendar years were marked by Regnal Numbers. During Sargonic times, a system of year-names was used. This practice continued until the end of the Old Babylonian period, for example, "Year in which the divine Hammu[rabi] the king Esznunna destroyed by a flood.” Afterwards, Regnal Numbers were used by all succeeding kingdoms. During the Akkadian Empire 3 of the presumed 40 Sargon year-names are known, 1 (presumed 9) of Rimush, 20 (presumed 56) of Naram-Sin, and 18 (presumed 18) of Shar-kali-shari. Recently, a single year-name had been found "In the year that Dūr-Maništusu was established.” There are also, perhaps, a dozen more known, which cannot be firmly linked to a ruler. Especially with the paucity of other inscriptions, year-names are extremely important in determining the history of the Akkadian Empire. As an example, from one year-name, we know that the empire was in conflict with the Gutians long before its end. It attests the name of a Gutian ruler and marks the construction of two temples in Babylon as recognition of Akkadian victory. The final contemporary source are seals and their sealing dates. These are especially important here, as markers, with the shortage of other Akkadian Empire epigraphics and very useful to historians. As an example, two seals and one sealing were found in the Royal Cemetery at Ur which contained the name of Sargons's daughter En-hedu-ana. This provided confirmation of her existence. The seals read "En-hedu-ana, daughter of Sargon: Ilum-pal[il] (is) her coiffeur" and "Adda, estate supervisor/majordomo of En-hedu-ana". At Tell Mozan (ancient Urkesh) brought to light a clay sealing of Tar'am-Agade (Akkad loves <her>), a previously unknown daughter of Naram-Sin, who was possibly married to an unidentified local endan (ruler). Later copies and literary compositions So great was the Akkadian Empire, especially Sargon and Narim-Sin, that its history was passed down for millenia. This ranged on one end to purported copies of still existing Sargonic period inscriptions to literary tales made up from the whole cloth at the other. A few examples: Great Rebellion Against Naram-Sin – At one point in his reign much of the Empire, especially in the old mainly Sumerian city-states, rose up against Naram-Sin. The revolt was crushed but the echoes of the event were passed down in history. Some of the tales, like "Naram-Sin and the Enemy Hordes" (Old Babylonian – purported to be a copy of an inscription at the temple of Nergal in Cutha) and "Gula-AN and the Seventeen Kings against Naram-Sin" were literary compositions which further developed and changed the themes. The earliest examplar, from the Old Babylonian period, is found in several incomplete tablets and fragments, which differ somewhat, purporting to be copies of an inscription on a statue of Naram-Sin standing in the Ekur temple of Enlil at Nippur. Because it aligns with known contemporary inscriptions and year name it is considered authentic, which the usual Mesopotamian slant that something going wrong means you displeased the gods. Cursing of Agade – A purely literary composition which was handed down for millennia in Mesopotamia. Composed in the Ur III period, a century or at most two after the events, it is essentially agitprop. After a long period of Akkadian dominance the Sumerians from the south ar back in ascendancy. The Ur rule is sometimes called the Neo-Sumerian Empire. This composition lays all the troubles before the rise of Ur at the feet of the Akkadian Empire (because Naram-Sin leveled the Ekur temple of Enlil while rebuilding it causing the eight chief deities of Mesopotamia to withdraw their support and protection from Akkad). While basically fiction, it is still useful to historians. There were a number of these, passed down as part of scribel tradition including The Birth Legend of Sargon (Neo-Assyrian), Weidner Chronicle, and the Geographical Treatise on Sargon of Akkad's Empire. Archaeology Identifying architectural remains is hindered by the fact that there are sometimes no clear distinctions between features thought to stem from the preceding Early Dynastic period, and those thought to be Akkadian. Likewise, material that is thought to be Akkadian continues to be in use into the Ur III period. There is a similar issue with cuneiform tablets. In the early Akkadian Empire tablets and the signs on them are much like those from earlier periods, before developing into the much different Classical Sargonic style. With the capital, Akkad, still unlocated, archaeological remains of the empire are still to be found, mainly at the cities they established regional governors. An example would be Adab where Naram-Sin established direct imperial control after Adab joined the "great revolt". After destroying the city of Mari the Akkadian Empire rebuilt it as an administrative center with an imperial governor. The city of Nuzi was established by the Akkadians and a number of economic and administrative texts were found there. Similarly, there are Marad, Nippur, Tutub and Ebla. Excavation at the modern site of Tell Brak has suggested that the Akkadians rebuilt a city ("Brak" or "Nagar") on this site, for use as an administrative center. The city included two large buildings including a complex with temple, offices, courtyard, and large ovens. Dating and periodization The Akkadian period is generally dated to 2334–2154 BC (according to the middle chronology). The short-chronology dates of 2270–2083 BC are now considered less likely. It was preceded by the Early Dynastic Period of Mesopotamia (ED) and succeeded by the Ur III Period, although both transitions are blurry. For example, it is likely that the rise of Sargon of Akkad coincided with the late ED Period and that the final Akkadian kings ruled simultaneously with the Gutian kings alongside rulers at the city-states of both Uruk and Lagash. The Akkadian Period is contemporary with EB IV (in Israel), EB IVA and EJ IV (in Syria), and EB IIIB (in Turkey). Timeline of rulers The relative order of Akkadian kings is clear, while noting that the Ur III version of the Sumerian King List inverts the order of Rimush and Manishtushu. The absolute dates of their reigns are approximate (as with all dates prior to the Late Bronze Age collapse c. 1200 BC). History and development of the empire Pre-Sargonic Akkad The Akkadian Empire takes its name from the region and the city of Akkad, both of which were localized in the general confluence area of the Tigris and Euphrates Rivers. Although the city of Akkad has not yet been identified on the ground, it is known from various textual sources. Among these is at least one text predating the reign of Sargon. Together with the fact that the name Akkad is of non-Akkadian origin, this suggests that the city of Akkad may have already been occupied in pre-Sargonic times. Sargon of Akkad The Bible refers to Akkad in Genesis 10:10–12, which states: "The beginning of his Nimrod's kingdom was Babel, and Erech, and Accad, and Calneh, in the land of Shinar. Out of that land he went forth into Assyria, and built Nineveh, and Rehoboth-Ir, and Calah, and Resen between Nineveh and Calah (the same is the great city)." Nimrod's historical identity is unknown or debated, but Nimrod has been identified as Sargon of Akkad by some, and others have compared him with the legendary Gilgamesh, king of Uruk (Erech). Sargon of Akkad defeated and captured Lugal-zage-si in the Battle of Uruk and conquered his empire. The earliest records in the Akkadian language date to the time of Sargon. Sargon was claimed to be the son of La'ibum or Itti-Bel, a humble gardener, and possibly a hierodule, or priestess to Ishtar or Inanna. One legend related to Sargon in Neo-Assyrian times says that Later claims made on behalf of Sargon were that his mother was an "entu" priestess (high priestess). The claims might have been made to ensure a pedigree of nobility, since only a highly placed family could achieve such a position. Originally a cupbearer (Rabshakeh) to a king of Kish with a Semitic name, Ur-Zababa, Sargon thus became a gardener, responsible for the task of clearing out irrigation canals. The royal cupbearer at this time was in fact a prominent political position, close to the king and with various high level responsibilities not suggested by the title of the position itself. This gave him access to a disciplined corps of workers, who also may have served as his first soldiers. Displacing Ur-Zababa, Sargon was crowned king, and he entered upon a career of foreign conquest. Four times he invaded Syria and Canaan, and he spent three years thoroughly subduing the countries of "the west" to unite them with Mesopotamia "into a single empire". However, Sargon took this process further, conquering many of the surrounding regions to create an empire that reached westward as far as the Mediterranean Sea and perhaps Cyprus (Kaptara); northward as far as the mountains (a later Hittite text asserts he fought the Hattian king Nurdaggal of Burushanda, well into Anatolia); eastward over Elam; and as far south as Magan (Oman) — a region over which he reigned for purportedly 56 years, though only four "year-names" survive. He consolidated his dominion over his territories by replacing the earlier opposing rulers with noble citizens of Akkad, his native city where loyalty would thus be ensured. Trade extended from the silver mines of Anatolia to the lapis lazuli mines in modern Afghanistan, the cedars of Lebanon and the copper of Magan. This consolidation of the city-states of Sumer and Akkad reflected the growing economic and political power of Mesopotamia. The empire's breadbasket was the rain-fed agricultural system and a chain of fortresses was built to control the imperial wheat production. Images of Sargon were erected on the shores of the Mediterranean, in token of his victories, and cities and palaces were built at home with the spoils of the conquered lands. Elam and the northern part of Mesopotamia were also subjugated, and rebellions in Sumer were put down. Contract tablets have been found dated in the years of the campaigns against Canaan and against Sarlak, king of Gutium. He also boasted of having subjugated the "four-quarters" — the lands surrounding Akkad to the north, the south (Sumer), the east (Elam), and the west (Martu). Some of the earliest historiographic texts (ABC 19, 20) suggest he rebuilt the city of Babylon (Bab-ilu) in its new location near Akkad. Sargon, throughout his long life, showed special deference to the Sumerian deities, particularly Inanna (Ishtar), his patroness, and Zababa, the warrior god of Kish. He called himself "The anointed priest of Anu" and "the great ensi of Enlil" and his daughter, Enheduanna, was installed as priestess to Nanna at the temple in Ur. Troubles multiplied toward the end of his reign. A later Babylonian text states: It refers to his campaign in "Elam", where he defeated a coalition army led by the King of Awan and forced the vanquished to become his vassals. Also shortly after, another revolt took place: Rimush and Manishtushu Sargon had crushed opposition even at old age. These difficulties broke out again in the reign of his sons, where revolts broke out during the nine-year reign of Rimush (2278–2270 BC), who fought hard to retain the empire, and was successful until he was assassinated by some of his own courtiers. According to his inscriptions, he faced widespread revolts, and had to reconquer the cities of Ur, Umma, Adab, Lagash, Der, and Kazallu from rebellious ensis: Rimush introduced mass slaughter and large scale destruction of the Sumerian city-states, and maintained meticulous records of his destructions. Most of the major Sumerian cities were destroyed, and Sumerian human losses were enormous: Rimush's elder brother, Manishtushu (2269–2255 BC) succeeded him. The latter seems to have fought a sea battle against 32 kings who had gathered against him and took control over their pre-Arab country, consisting of modern-day United Arab Emirates and Oman. Despite the success, like his brother he seems to have been assassinated in a palace conspiracy. Naram-Sin Manishtushu's son and successor, Naram-Sin (2254–2218 BC), due to vast military conquests, assumed the imperial title "King Naram-Sin, king of the four-quarters" (Lugal Naram-Sîn, Šar kibrat 'arbaim), the four-quarters as a reference to the entire world. He was also for the first time in Sumerian culture, addressed as "the god (Sumerian = DINGIR, Akkadian = ilu) of Agade" (Akkad), in opposition to the previous religious belief that kings were only representatives of the people towards the gods. He also faced revolts at the start of his reign, but quickly crushed them. Naram-Sin also recorded the Akkadian conquest of Ebla as well as Armanum and its king. To better police Syria, he built a royal residence at Tell Brak, a crossroads at the heart of the Khabur River basin of the Jezirah. Naram-Sin campaigned against Magan which also revolted; Naram-Sin "marched against Magan and personally caught Mandannu, its king", where he instated garrisons to protect the main roads. The chief threat seemed to be coming from the northern Zagros Mountains, the Lulubis and the Gutians. A campaign against the Lullubi led to the carving of the "Victory Stele of Naram-Suen", now in the Louvre. Hittite sources claim Naram-Sin of Akkad even ventured into Anatolia, battling the Hittite and Hurrian kings Pamba of Hatti, Zipani of Kanesh, and 15 others. The economy was highly planned. Grain was cleaned, and rations of grain and oil were distributed in standardized vessels made by the city's potters. Taxes were paid in produce and labour on public walls, including city walls, temples, irrigation canals and waterways, producing huge agricultural surpluses. This newfound Akkadian wealth may have been based upon benign climatic conditions, huge agricultural surpluses and the confiscation of the wealth of other peoples. In later Assyrian and Babylonian texts, the name Akkad, together with Sumer, appears as part of the royal title, as in the Sumerian LUGAL KI-EN-GI KI-URI or Akkadian Šar māt Šumeri u Akkadi, translating to "king of Sumer and Akkad". This title was assumed by the king who seized control of Nippur, the intellectual and religious center of southern Mesopotamia. During the Akkadian period, the Akkadian language became the lingua franca of the Middle East, and was officially used for administration, although the Sumerian language remained as a spoken and literary language. The spread of Akkadian stretched from Syria to Elam, and even the Elamite language was temporarily written in Mesopotamian cuneiform. Akkadian texts later found their way to far-off places, from Egypt (in the Amarna Period) and Anatolia, to Persia (Behistun). Submission of Sumerian kings The submission of some Sumerian rulers to the Akkadian Empire, is recorded in the seal inscriptions of Sumerian rulers such as Lugal-ushumgal, governor (ensi) of Lagash ("Shirpula"), circa 2230–2210 BC. Several inscriptions of Lugal-ushumgal are known, particularly seal impressions, which refer to him as governor of Lagash and at the time a vassal (, arad, "servant" or "slave") of Naram-Sin, as well as his successor Shar-kali-sharri. One of these seals proclaims: It can be considered that Lugal-ushumgal was a collaborator of the Akkadian Empire, as was Meskigal, ruler of Adab. Later however, Lugal-ushumgal was succeeded by Puzer-Mama who, as Akkadian power waned, achieved independence from Shar-Kali-Sharri, assuming the title of "King of Lagash" and starting the illustrious Second Dynasty of Lagash. Collapse The empire of Akkad likely fell in the 22nd century BC, within 180 years of its founding, ushering in a "Dark Age" with no prominent imperial authority until the Third Dynasty of Ur. The region's political structure may have reverted to the status quo ante of local governance by city-states. By the end of Sharkalisharri's reign, the empire had begun to unravel. After several years of chaos (and four kings), Shu-turul and Dudu appear to have restored some centralized authority for several decades; however, they were unable to prevent the empire from eventually collapsing outright, eventually ceding power to Gutians, based in Adab, who had been conquered by Akkad during the reign of Sharkalisharri. Little is known about the Gutian period, or how long it endured. Cuneiform sources suggest that the Gutians' administration showed little concern for maintaining agriculture, written records, or public safety; they reputedly released all farm animals to roam about Mesopotamia freely and soon brought about famine and rocketing grain prices. The Sumerian king Ur-Nammu (2112–2095 BC) cleared the Gutians from Mesopotamia during his reign. The Sumerian King List, describing the Akkadian Empire after the death of Shar-kali-shari, states: However, there are no known year-names or other archaeological evidence verifying any of these later kings of Akkad or Uruk, apart from several artefact referencing king Dudu of Akkad and Shu-turul. The named kings of Uruk may have been contemporaries of the last kings of Akkad, but in any event could not have been very prominent. The period between BC and 2004 BC is known as the Ur III period. Documents again began to be written in Sumerian, although Sumerian was becoming a purely literary or liturgical language, much as Latin later would be in Medieval Europe. One explanation for the end of the Akkadian empire is simply that the Akkadian dynasty could not maintain its political supremacy over other independently powerful city-states. Natural causes: drought, seasonal weather patterns One theory, which remains controversial, associates regional decline at the end of the Akkadian period (and of the First Intermediary Period following the Old Kingdom in Ancient Egypt) with rapidly increasing aridity, and failing rainfall in the region of the Ancient Near East, caused by a global centennial-scale drought, sometimes called the 4.2 kiloyear event. Harvey Weiss has shown that Peter B. de Menocal has shown "there was an influence of the North Atlantic Oscillation on the streamflow of the Tigris and Euphrates at this time, which led to the collapse of the Akkadian Empire". More recent analysis of simulations from the HadCM3 climate model indicate that there was a shift to a more arid climate on a timescale that is consistent with the collapse of the empire. Excavation at Tell Leilan suggests that this site was abandoned soon after the city's massive walls were constructed, its temple rebuilt and its grain production reorganized. The debris, dust, and sand that followed show no trace of human activity. Soil samples show fine wind-blown sand, no trace of earthworm activity, reduced rainfall and indications of a drier and windier climate. Evidence shows that skeleton-thin sheep and cattle died of drought, and up to 28,000 people abandoned the site, presumably seeking wetter areas elsewhere. Tell Brak shrank in size by 75%. Trade collapsed. Nomadic herders such as the Amorites moved herds closer to reliable water suppliers, bringing them into conflict with Akkadian populations. This climate-induced collapse seems to have affected the whole of the Middle East, and to have coincided with the collapse of the Egyptian Old Kingdom. This collapse of rain-fed agriculture in the Upper Country meant the loss to southern Mesopotamia of the agrarian subsidies which had kept the Akkadian Empire solvent. Water levels within the Tigris and Euphrates fell 1.5 meters beneath the level of 2600 BC, and although they stabilized for a time during the following Ur III period, rivalries between pastoralists and farmers increased. Attempts were undertaken to prevent the former from herding their flocks in agricultural lands, such as the building of a wall known as the "Repeller of the Amorites" between the Tigris and Euphrates under the Ur III ruler Shu-Sin. Such attempts led to increased political instability; meanwhile, severe depression occurred to re-establish demographic equilibrium with the less favorable climatic conditions. Richard Zettler has critiqued the drought theory, observing that the chronology of the Akkadian empire is very uncertain and that available evidence is not sufficient to show its economic dependence on the northern areas excavated by Weiss and others. He also criticizes Weiss for taking Akkadian writings literally to describe certain catastrophic events. According to Joan Oates, at Tell Brak, the soil "signal" associated with the drought lies below the level of Naram-Sin's palace. However, evidence may suggest a tightening of Akkadian control following the Brak 'event', for example, the construction of the heavily fortified 'palace' itself and the apparent introduction of greater numbers of Akkadian as opposed to local officials, perhaps a reflection of unrest in the countryside of the type that often follows some natural catastrophe. Furthermore, Brak remained occupied and functional after the fall of the Akkadians. In 2019, a study by Hokkaido University on fossil corals in Oman provides an evidence that prolonged winter shamal seasons led to the salinization of the irrigated fields; hence, a dramatic decrease in crop production triggered a widespread famine and eventually the collapse of the ancient Akkadian Empire. Government The Akkadian government formed a "classical standard" with which all future Mesopotamian states compared themselves. Traditionally, the ensi was the highest functionary of the Sumerian city-states. In later traditions, one became an ensi by marrying the goddess Inanna, legitimising the rulership through divine consent. Initially, the monarchical lugal (lu = man, gal =Great) was subordinate to the priestly ensi, and was appointed at times of troubles, but by later dynastic times, it was the lugal who had emerged as the preeminent role, having his own "é" (= house) or "palace", independent from the temple establishment. By the time of Mesalim, whichever dynasty controlled the city of Kish was recognised as šar kiššati (= king of Kish), and was considered preeminent in Sumer, possibly because this was where the two rivers approached, and whoever controlled Kish ultimately controlled the irrigation systems of the other cities downstream. As Sargon extended his conquest from the "Lower Sea" (Persian Gulf), to the "Upper Sea" (Mediterranean), it was felt that he ruled "the totality of the lands under heaven", or "from sunrise to sunset", as contemporary texts put it. Under Sargon, the ensis generally retained their positions, but were seen more as provincial governors. The title šar kiššati became recognised as meaning "lord of the universe". Sargon is even recorded as having organised naval expeditions to Dilmun (Bahrain) and Magan, amongst the first organised military naval expeditions in history. Whether he also did in the case of the Mediterranean with the kingdom of Kaptara (possibly Cyprus), as claimed in later documents, is more questionable. With Naram-Sin, Sargon's grandson, this went further than with Sargon, with the king not only being called "Lord of the Four-Quarters (of the Earth)", but also elevated to the ranks of the dingir (= gods), with his own temple establishment. Previously a ruler could, like Gilgamesh, become divine after death but the Akkadian kings, from Naram-Sin onward, were considered gods on earth in their lifetimes. Their portraits showed them of larger size than mere mortals and at some distance from their retainers. One strategy adopted by both Sargon and Naram-Sin, to maintain control of the country, was to install their daughters, Enheduanna and Emmenanna respectively, as high priestess to Sin, the Akkadian version of the Sumerian moon deity, Nanna, at Ur, in the extreme south of Sumer; to install sons as provincial ensi governors in strategic locations; and to marry their daughters to rulers of peripheral parts of the Empire (Urkesh and Marhashe). A well documented case of the latter is that of Naram-Sin's daughter Tar'am-Agade at Urkesh. Records at the Brak administrative complex suggest that the Akkadians appointed locals as tax collectors. Economy The population of Akkad, like nearly all pre-modern states, was entirely dependent upon the agricultural systems of the region, which seem to have had two principal centres: the irrigated farmlands of southern Iraq that traditionally had a yield of 30 grains returned for each grain sown and the rain-fed agriculture of northern Iraq, known as the "Upper Country." Southern Iraq during Akkadian period seems to have been approaching its modern rainfall level of less than per year, with the result that agriculture was totally dependent upon irrigation. Before the Akkadian period, the progressive salinisation of the soils, produced by poorly drained irrigation, had been reducing yields of wheat in the southern part of the country, leading to the conversion to more salt-tolerant barley growing. Urban populations there had peaked already by 2,600 BC, and demographic pressures were high, contributing to the rise of militarism apparent immediately before the Akkadian period (as seen in the Stele of the Vultures of Eannatum). Warfare between city states had led to a population decline, from which Akkad provided a temporary respite. It was this high degree of agricultural productivity in the south that enabled the growth of the highest population densities in the world at this time, giving Akkad its military advantage. The water table in this region was very high and replenished regularly—by winter storms in the headwaters of the Tigris and Euphrates from October to March and from snow-melt from March to July. Flood levels, that had been stable from about 3,000 to 2,600 BC, had started falling, and by the Akkadian period were a half-meter to a meter lower than recorded previously. Even so, the flat country and weather uncertainties made flooding much more unpredictable than in the case of the Nile; serious deluges seem to have been a regular occurrence, requiring constant maintenance of irrigation ditches and drainage systems. Farmers were recruited into regiments for this work from August to October—a period of food shortage—under the control of city temple authorities, thus acting as a form of unemployment relief. Gwendolyn Leick has suggested that this was Sargon's original employment for the king of Kish, giving him experience in effectively organising large groups of men; a tablet reads, "Sargon, the king, to whom Enlil permitted no rival—5,400 warriors ate bread daily before him". Harvest was in the late spring and during the dry summer months. Nomadic Amorites from the northwest would pasture their flocks of sheep and goats to graze on the crop residue and be watered from the river and irrigation canals. For this privilege, they would have to pay a tax in wool, meat, milk, and cheese to the temples, who would distribute these products to the bureaucracy and priesthood. In good years, all would go well, but in bad years, wild winter pastures would be in short supply, nomads would seek to pasture their flocks in the grain fields, and conflicts with farmers would result. It would appear that the subsidizing of southern populations by the import of wheat from the north of the Empire temporarily overcame this problem, and it seems to have allowed economic recovery and a growing population within this region. Foreign trade As a result, Sumer and Akkad had a surplus of agricultural products but was short of almost everything else, particularly metal ores, timber and building stone, all of which had to be imported. The spread of the Akkadian state as far as the "silver mountain" (possibly the Taurus Mountains), the "cedars" of Lebanon, and the copper deposits of Magan, was largely motivated by the goal of securing control over these imports. One tablet, an Old Babylonian Period copy of an original inscription, reads: International trade developed during the Akkadian period. Indus-Mesopotamia relations also seem to have expanded: Sargon of Akkad (circa 2300 or 2250 BC), was the first Mesopotamian ruler to make an explicit reference to the region of Meluhha, which is generally understood as being the Baluchistan or the Indus area. Culture Akkadian art In art, there was a great emphasis on the kings of the dynasty, alongside much that continued earlier Sumerian art. Little architecture remains. In large works and small ones such as seals, the degree of realism was considerably increased, but the seals show a "grim world of cruel conflict, of danger and uncertainty, a world in which man is subjected without appeal to the incomprehensible acts of distant and fearful divinities who he must serve but cannot love. This sombre mood ... remained characteristic of Mesopotamian art..." Akkadian sculpture is remarkable for its fineness and realism, which shows a clear advancement compared to the previous period of Sumerian art. Seals The Akkadians used visual arts as a vehicle of ideology. They developed a new style for cylinder seals by reusing traditional animal decorations but organizing them around inscriptions, which often became central parts of the layout. The figures also became more sculptural and naturalistic. New elements were also included, especially in relation to the rich Akkadian mythology. Language During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism. The influence of Sumerian on Akkadian (and vice versa) is evident in all areas, from lexical borrowing on a massive scale, to syntactic, morphological, and phonological convergence. This has prompted scholars to refer to Sumerian and Akkadian in the third millennium as a sprachbund. Akkadian gradually replaced Sumerian as a spoken language somewhere around 2000 BC (the exact dating being a matter of debate), but Sumerian continued to be used as a sacred, ceremonial, literary, and scientific language in Mesopotamia until the 1st century AD. Poet–priestess Enheduanna Sumerian literature continued in rich development during the Akkadian period. Enheduanna, the "wife (Sumerian dam = high priestess) of Nanna [the Sumerian moon god] and daughter of Sargon" of the temple of Sin at Ur, who lived –2250 BC, is the first poet in history whose name is known. Her known works include hymns to the goddess Inanna, the Exaltation of Inanna and In-nin sa-gur-ra. A third work, the Temple Hymns, a collection of specific hymns, addresses the sacred temples and their occupants, the deity to whom they were consecrated. The works of this poet are significant, because although they start out using the third person, they shift to the first person voice of the poet herself, and they mark a significant development in the use of cuneiform. As poet, princess, and priestess, she was a person who, according to William W. Hallo, "set standards in all three of her roles for many succeeding centuries" In the Exultation of Inanna, The kings of Akkad were legendary among later Mesopotamian civilizations, with Sargon understood as the prototype of a strong and wise leader, and his grandson Naram-Sin considered the wicked and impious leader (Unheilsherrscher in the analysis of Hans Gustav Güterbock) who brought ruin upon his kingdom. Technology A tablet from the periods reads, "(From the earliest days) no-one had made a statue of lead, (but) Rimush king of Kish, had a statue of himself made of lead. It stood before Enlil; and it recited his (Rimush's) virtues to the idu of the gods". The copper Bassetki Statue, cast with the lost wax method, testifies to the high level of skill that craftsmen achieved during the Akkadian period. See also List of cities of the ancient Near East List of Mesopotamian deities History of Mesopotamia List of Mesopotamian dynasties Notes Bibliography Liverani, Mario, ed. (1993). Akkad: The First World Empire: Structure, Ideology Traditions. Padova: Sargon srl. Oates, Joan (2004). "Archaeology in Mesopotamia: Digging Deeper at Tell Brak". 2004 Albert Reckitt Archaeological Lecture. In Proceedings of the British Academy: 2004 Lectures; Oxford University Press, 2005. . Further reading Gough, M.A, Historical Perception in the Sargonic Literary Tradition. The Implication of Copied Texts, Rosetta 1, pp 1–9, 2006 Paszke, Marcin Z, "From Sargon To Narām-Sîn: some remarks on Akkadian military activity in the II nd half of the III rd millennium bc. The example of eastern campaigns", Acta Archaeologica Lodziensia 68, pp. 75–83, 2022 E. A. Speiser, "Some Factors in the Collapse of Akkad", Journal of the American Oriental Society, vol. 72, no. 3, pp. 97–101, (Jul. - Sep. 1952) External links Iraq's Ancient Past – Penn Museum Year Names of Narim-Sin – CDLI Year Named of Shar-kali-Sharri – CDLI Site on Enheduanna at Virginia Tech University (archived 12 December 2009) States and territories established in the 3rd millennium BC States and territories disestablished in the 3rd millennium BC Assyrian geography Ancient Mesopotamia Ancient Upper Mesopotamia Ancient Levant 24th-century BC establishments 3rd-millennium BC disestablishments Former monarchies of Asia Nimrod Former empires	6
Ajax may refer to: Greek mythology and tragedy Ajax the Great, a Greek mythological hero, son of King Telamon and Periboea Ajax the Lesser, a Greek mythological hero, son of Oileus, the king of Locris Ajax (play), by the ancient Greek tragedian Sophocles, about Ajax the Great Arts and entertainment Fictional characters Ajax Duckman, in the animated television series Duckman Marvel Comics: Ajax the Greater, another name for Ajak, one of the Eternals from Marvel Comics Ajax the Lesser, another name for Arex, one of the Eternals from Marvel Comics Ajax, a member of the Pantheon appearing in Marvel Comics Ajax (Francis Fanny), a fictional supervillain first appearing in Deadpool #14 Martian Manhunter, a DC Comics superhero called Ajax in Brazil and Portugal Ajax, a Call of Duty: Black Ops 4 operative Ajax, from the video game Genshin Impact Music A-Jax (band), a South Korean boy band Ajax (band), an electronic music band from New York City Ajax (opera), by the French composer Toussaint Bertin de la Doué DJ Ajax (1971-2013; born Adrian Thomas), an Australian electro mashup DJ Lisa Ajax (born 1998), Swedish singer "Ajax" (song), a song by Tante Leen, 1969 Ajax Records, a former North American record company Other arts and entertainment Ajax (painting), a painting by John Steuart Curry Ajax (Disney), a fictional company (the Disney equivalent of Looney Tunes' Acme Corporation) A-Jax (video game), a 1987 Konami arcade game Computing Ajax (floppy disk controller), a floppy disk controller fitted to the Atari STE Ajax (programming), Asynchronous JavaScript and XML, a method used in web application development, and a software framework for it Places Canada Ajax (federal electoral district), in the Durham Region of Ontario Ajax (provincial electoral district), in Ontario Ajax, Ontario, a town in the Greater Toronto Area United States Ajax, Louisiana, an unincorporated community Ajax, Missouri, a ghost town Ajax Peak, a summit near Telluride, Colorado Ajax, South Dakota, an unincorporated community Ajax, Utah, a ghost town Ajax, Virginia, an unincorporated community Ajax, West Virginia, an unincorporated community Aspen Mountain (Colorado), also known as Ajax Mountain Elsewhere Mount Ajax, part of the Admiralty Mountains, Victoria Land, Antarctic 1404 Ajax, an asteroid People Ajax (missionary), Arian missionary who converted the Suevi to Christianity ( 466) Ajax, pen name of Sidney William Jackson (1873–1946), Australian naturalist and ornithologist Ajax, nickname of Heinrich Bleichrodt (1909–1977), German World War II U-boat commander Sport Association football (soccer) AFC Ajax, a football club in Amsterdam, Netherlands Ajax Cape Town F.C., a South African football club Ajax Futebol Clube, a Brazilian football club Ajax de Ouenzé, a Congolese football club FC Ajax Lasnamäe, an Estonian football club Ajax Orlando Prospects, American soccer team from Orlando, Florida, a.k.a. Ajax America Ajax America Women, American women's soccer team from California Aias Salamina F.C., a football club in Salamina, Greece Ajax Sportsman Combinatie, a cricket and football club in Leiden, Netherlands Rabat Ajax F.C., a Maltese football club Unión Ájax, a football club in Trujillo, Honduras Voetbal Vereniging Ajax, a Surinamese football club Other sports Ajax Kenitra, a Moroccan futsal (indoor football) club Ajax København, a Danish handball team Ajax (horse) (born 1901), a French Champion racehorse Ajax II (born 1934), an Australian Champion racehorse Military , several ships of the Royal Navy , several ships of the US Navy General Dynamics Ajax, a family of armoured fighting vehicles for the British Army Operation Ajax, the 1953 Iranian coup d'état Transport Ajax (1906 automobile), a Swiss automobile Ajax (1913 automobile), a French automobile by the American Briscoe brothers Ajax (1914 automobile), an American automobile by Ajax Motors Co. of Seattle, Washington Ajax (1921 automobile), an American prototype that was not produced Ajax (Nash Motors), an automobile brand of Nash Motors, 1925–1926 Ajax (locomotive), several train locomotives Ajax (motorcycle), manufactured in England between 1923 and 1924 Ajax (crane barge), a floating crane used to install the Panama Canal locks Ajax (ship), various ships Ajax GO Station, a train and bus station in Ajax, Ontario, Canada Ajax Motors Co., an American carmaker, manufacturer of the Ajax (1914 automobile) Other uses Ajax (cleaning product), a brand of household cleaning products AFC Ajax N.V., a sports company associated with AFC Ajax Kanichee Mine, Temagami, Ontario, also known as Ajax Mine Ajax High School, a public high school in Ajax, Ontario, Canada AJAX furnace, a type of open hearth furnace See also Nike Ajax, the world's first operational surface-to-air missile Ayaks, a hypersonic waverider aircraft program started in the Soviet Union	6
Alboin (530s – 28 June 572) was king of the Lombards from about 560 until 572. During his reign the Lombards ended their migrations by settling in Italy, the northern part of which Alboin conquered between 569 and 572. He had a lasting effect on Italy and the Pannonian Basin; in the former his invasion marked the beginning of centuries of Lombard rule, and in the latter his defeat of the Gepids and his departure from Pannonia ended the dominance there of the Germanic peoples. The period of Alboin's reign as king in Pannonia following the death of his father, Audoin, was one of confrontation and conflict between the Lombards and their main neighbors, the Gepids. The Gepids initially gained the upper hand, but in 567, thanks to his alliance with the Avars, Alboin inflicted a decisive defeat on his enemies, whose lands the Avars subsequently occupied. The increasing power of his new neighbours caused Alboin some unease however, and he therefore decided to leave Pannonia for Italy, hoping to take advantage of the Byzantine Empire's vulnerability in defending its territory in the wake of the Gothic War. After gathering a large coalition of peoples, Alboin crossed the Julian Alps in 568, entering an almost undefended Italy. He rapidly took control of most of Venetia and Liguria. In 569, unopposed, he took northern Italy's main city, Milan. Pavia offered stiff resistance however, and was taken only after a siege lasting three years. During that time Alboin turned his attention to Tuscany, but signs of factionalism among his supporters and Alboin's diminishing control over his army increasingly began to manifest themselves. Alboin was assassinated on 28 June 572, in a coup d'état instigated by the Byzantines. It was organized by the king's foster brother, Helmichis, with the support of Alboin's wife, Rosamund, daughter of the Gepid king whom Alboin had killed some years earlier. The coup failed in the face of opposition from a majority of the Lombards, who elected Cleph as Alboin's successor, forcing Helmichis and Rosamund to flee to Ravenna under imperial protection. Alboin's death deprived the Lombards of the only leader who could have kept the newborn Germanic entity together, the last in the line of hero-kings who had led the Lombards through their migrations from the vale of the Elbe to Italy. For many centuries following his death Alboin's heroism and his success in battle were celebrated in Saxon and Bavarian epic poetry. Etymology The name Alboin derives from the Proto-Germanic roots albiz ("elf") and winiz ("friend"); it is thus cognate with the Old English name Ælfwine. He was known in Latin as Alboinus and in Greek as Ἀλβοΐνος (Alboinos). In modern Italian he is Alboino and in modern Lombard Albuì. Father's rule The Lombards under King Wacho had migrated towards the east into Pannonia, taking advantage of the difficulties facing the Ostrogothic Kingdom in Italy following the death of its founder, Theodoric, in 526. Wacho's death in about 540 brought his son Walthari to the throne, but, as the latter was still a minor, the kingdom was governed in his stead by Alboin's father, Audoin, of the Gausian clan. Seven years later Walthari died, giving Audoin the opportunity to crown himself and overthrow the reigning Lethings. Alboin was probably born in the 530s in Pannonia, the son of Audoin and his wife, Rodelinda. She may have been the niece of King Theodoric and betrothed to Audoin through the mediation of Emperor Justinian. Like his father, Alboin was raised a pagan, although Audoin had at one point attempted to gain Byzantine support against his neighbours by professing himself a Christian. Alboin took as his first wife the Christian Chlothsind, daughter of the Frankish King Chlothar. This marriage, which took place soon after the death of the Frankish ruler Theudebald in 555, is thought to reflect Audoin's decision to distance himself from the Byzantines, traditional allies of the Lombards, who had been lukewarm when it came to supporting Audoin against the Gepids. The new Frankish alliance was important because of the Franks' known hostility to the Byzantine empire, providing the Lombards with more than one option. However, the Prosopography of the Later Roman Empire interprets events and sources differently, believing that Alboin married Chlothsind when already a king in or shortly before 561, the year of Chlothar's death. Alboin first distinguished himself on the battlefield in a clash with the Gepids. At the Battle of Asfeld (552), he killed Turismod, son of the Gepid king Thurisind, in a victory that resulted in the Emperor Justinian's intervention to maintain equilibrium between the rival regional powers. After the battle, according to a tradition reported by Paul the Deacon, to be granted the right to sit at his father's table, Alboin had to ask for the hospitality of a foreign king and have him donate his weapons, as was customary. For this initiation, he went to the court of Thurisind, where the Gepid king gave him Turismod's arms. Walter Goffart believes it is probable that in this narrative Paul was making use of an oral tradition, and is sceptical that it can be dismissed as merely a typical topos of an epic poem. Reign in Pannonia Alboin came to the throne after the death of his father, sometime between 560 and 565. As was customary among the Lombards, Alboin took the crown after an election by the tribe's freemen, who traditionally selected the king from the dead sovereign's clan. Shortly afterwards, in 565, a new war erupted with the Gepids, now led by Cunimund, Thurisind's son. The cause of the conflict is uncertain, as the sources are divided; the Lombard Paul the Deacon accuses the Gepids, while the Byzantine historian Menander Protector places the blame on Alboin, an interpretation favoured by historian Walter Pohl. An account of the war by the Byzantine Theophylact Simocatta sentimentalises the reasons behind the conflict, claiming it originated with Alboin's vain courting and subsequent kidnapping of Cunimund's daughter Rosamund, that Alboin proceeded then to marry. The tale is treated with scepticism by Walter Goffart, who observes that it conflicts with the Origo Gentis Langobardorum, where she was captured only after the death of her father. The Gepids obtained the support of the Emperor in exchange for a promise to cede him the region of Sirmium, the seat of the Gepid kings. Thus in 565 or 566 Justinian's successor Justin II sent his son-in-law Baduarius as magister militum (field commander) to lead a Byzantine army against Alboin in support of Cunimund, ending in the Lombards' complete defeat. Faced with the possibility of annihilation, Alboin made an alliance in 566 with the Avars under Bayan I, at the expense of some tough conditions: the Avars demanded a tenth of the Lombards' cattle, half of the war booty, and on the war's conclusion all of the lands held by the Gepids. The Lombards played on the pre-existing hostility between the Avars and the Byzantines, claiming that the latter were allied with the Gepids. Cunimund, on the other hand, encountered hostility when he once again asked the Emperor for military assistance, as the Byzantines had been angered by the Gepids' failure to cede Sirmium to them, as had been agreed. Moreover, Justin II was moving away from the foreign policy of Justinian, and believed in dealing more strictly with bordering states and peoples. Attempts to mollify Justin II with tributes failed, and as a result the Byzantines kept themselves neutral if not outright supportive of the Avars. In 567 the allies made their final move against Cunimund, with Alboin invading the Gepids' lands from the northwest while Bayan attacked from the northeast. Cunimund attempted to prevent the two armies joining up by moving against the Lombards and clashing with Alboin somewhere between the Tibiscus and Danube rivers. The Gepids were defeated in the ensuing battle, their king slain by Alboin, and Cunimund's daughter Rosamund taken captive, according to references in the Origo. The full destruction of the Gepid kingdom was completed by the Avars, who overcame the Gepids in the east. As a result, the Gepids ceased to exist as an independent people, and were partly absorbed by the Lombards and the Avars. Some time before 568, Alboin's first wife Chlothsind died, and after his victory against Cunimund Alboin married Rosamund, to establish a bond with the remaining Gepids. The war also marked a watershed in the geo-political history of the region, as together with the Lombard migration the following year, it signalled the end of six centuries of Germanic dominance in the Pannonian Basin. Preparations and departure from Pannonia Despite his success against the Gepids, Alboin had failed to greatly increase his power, and was now faced with a much stronger threat from the Avars. Historians consider this the decisive factor in convincing Alboin to undertake a migration, even though there are indications that before the war with the Gepids a decision was maturing to leave for Italy, a country thousands of Lombards had seen in the 550s when hired by the Byzantines to fight in the Gothic War. Additionally, the Lombards would have known of the weakness of Byzantine Italy, which had endured a number of problems after being retaken from the Goths. In particular the so-called Plague of Justinian had ravaged the region and conflict remained endemic, with the Three-Chapter Controversy sparking religious opposition and administration at a standstill after the able governor of the peninsula, Narses, was recalled. Nevertheless, the Lombards viewed Italy as a rich land which promised great booty, assets Alboin used to gather together a horde which included not only Lombards but many other peoples of the region, including Heruli, Suebi, Gepids, Thuringii, Bulgars, Sarmatians, the remaining Romans and a few Ostrogoths. But the most important group, other than the Lombards, were the Saxons, of whom 20,000 male warriors with their families participated in the trek. These Saxons were tributaries to the Frankish King Sigebert, and their participation indicates that Alboin had the support of the Franks for his venture. The precise size of the heterogeneous group gathered by Alboin is impossible to know, and many different estimates have been made. Neil Christie considers 150,000 to be a realistic size, a number which would make the Lombards a more numerous force than the Ostrogoths on the eve of their invasion of Italy. Jörg Jarnut proposes 100,000–150,000 as an approximation; Wilfried Menghen in Die Langobarden estimates 150,000 to 200,000; while Stefano Gasparri cautiously judges the peoples united by Alboin to be somewhere between 100,000 and 300,000. As a precautionary move Alboin strengthened his alliance with the Avars, signing what Paul calls a foedus perpetuum ("perpetual treaty") and what is referred to in the 9th-century Historia Langobardorum codicis Gothani as a pactum et foedus amicitiae ("pact and treaty of friendship"), adding that the treaty was put down on paper. By the conditions accepted in the treaty, the Avars were to take possession of Pannonia and the Lombards were promised military support in Italy should the need arise; also, for a period of 200 years the Lombards were to maintain the right to reclaim their former territories if the plan to conquer Italy failed, thus leaving Alboin with an alternative open. The accord also had the advantage of protecting Alboin's rear, as an Avar-occupied Pannonia would make it difficult for the Byzantines to bring forces to Italy by land. The agreement proved immensely successful, and relations with the Avars were almost uninterruptedly friendly during the lifetime of the Lombard Kingdom. A further cause of the Lombard migration into Italy may have been an invitation from Narses. According to a controversial tradition reported by several medieval sources, Narses, out of spite for having been removed by Justinian's successor Justin II, called the Lombards to Italy. Often dismissed as an unreliable tradition, it has been studied with attention by modern scholars, in particular Neil Christie, who see in it a possible record of a formal invitation by the Byzantine state to settle in northern Italy as foederati, to help protect the region against the Franks, an arrangement that may have been disowned by Justin II after Narses' removal. March to Italy The Lombard migration started on Easter Monday, 2 April 568. The decision to combine the departure with a Christian celebration can be understood in the context of Alboin's recent conversion to Arian Christianity, as attested by the presence of Arian Gothic missionaries at his court. The conversion is likely to have been motivated mostly by political considerations, and intended to consolidate the migration's cohesion, distinguishing the migrants from the Catholic Romans. It also connected Alboin and his people to the Gothic heritage, and in this way obtain the support of the Ostrogoths serving in the Byzantine army as foederati. It has been speculated that Alboin's migration could have been partly the result of a call from surviving Ostrogoths in Italy. The season chosen for leaving Pannonia was unusually early; the Germanic peoples generally waited until autumn before beginning a migration, giving themselves time to do the harvesting and replenish their granaries for the march. The reason behind the spring departure could be the anxiety induced by the neighboring Avars, despite the friendship treaty. Nomadic peoples like the Avars also waited for autumn to begin their military campaigns, as they needed enough forage for their horses. A sign of this anxiety can also be seen in the decision taken by Alboin to ravage Pannonia, which created a safety zone between the Lombards and the Avars. The road followed by Alboin to reach Italy has been the subject of controversy, as is the length of the trek. According to Neil Christie the Lombards divided themselves into migrational groups, with a vanguard scouting the road, probably following the Poetovio – Celeia – Emona – Forum Iulii route, while the wagons and most of the people proceeded slowly behind because of the goods and chattels they brought with them, and possibly also because they were waiting for the Saxons to join them on the road. By September raiding parties were looting Venetia, but it was probably only in 569 that the Julian Alps were crossed at the Vipava Valley; the eyewitness Secundus of Non gives the date as 20 or 21 May. The 569 date for the entry into Italy is not void of difficulties however, and Jörg Jarnut believes the conquest of most of Venetia had already been completed in 568. According to Carlo Guido Mor, a major difficulty remains in explaining how Alboin could have reached Milan on 3 September assuming he had passed the border only in the May of the same year. Invasion of Italy Foundation of the Duchy of Friuli The Lombards penetrated into Italy without meeting any resistance from the border troops (milities limitanei). The Byzantine military resources available on the spot were scant and of dubious loyalty, and the border forts may well have been left unmanned. What seems certain is that archaeological excavations have found no sign of violent confrontation in the sites that have been excavated. This agrees with Paul the Deacon's narrative, who speaks of a Lombard takeover in Friuli "without any hindrance". The first town to fall into the Lombards' hands was Forum Iulii (Cividale del Friuli), the seat of the local magister militum. Alboin chose this walled town close to the frontier to be capital of the Duchy of Friuli and made his nephew and shield bearer, Gisulf, duke of the region, with the specific duty of defending the borders from Byzantine or Avar attacks from the east. Gisulf obtained from his uncle the right to choose for his duchy those farae, or clans, that he preferred. Alboin's decision to create a duchy and designate a duke were both important innovations; until then, the Lombards had never had dukes or duchies based on a walled town. The innovation adopted was part of Alboin's borrowing of Roman and Ostrogothic administrative models, as in Late Antiquity the comes civitatis (city count) was the main local authority, with full administrative powers in his region. But the shift from count (comes) to duke (dux) and from county (comitatus) to duchy (ducatus) also signalled the progressive militarization of Italy. The selection of a fortified town as the centre for the new duchy was also an important change from the time in Pannonia, for while urbanized settlements had previously been ignored by the Lombards, now a considerable part of the nobility settled itself in Forum Iulii, a pattern that was repeated regularly by the Lombards in their other duchies. Conquest of Milan From Forum Iulii, Alboin next reached Aquileia, the most important road junction in the northeast, and the administrative capital of Venetia. The imminent arrival of the Lombards had a considerable impact on the city's population; the Patriarch of Aquileia Paulinus fled with his clergy and flock to the island of Grado in Byzantine-controlled territory. From Aquileia, Alboin took the Via Postumia and swept through Venetia, taking in rapid succession Tarvisium (Treviso), Vicentia (Vicenza), Verona, Brixia (Brescia) and Bergomum (Bergamo). The Lombards faced difficulties only in taking Opitergium (Oderzo), which Alboin decided to avoid, as he similarly avoided tackling the main Venetian towns closer to the coast on the Via Annia, such as Altinum, Patavium (Padova), Mons Silicis (Monselice), Mantua and Cremona. The invasion of Venetia generated a considerable level of turmoil, spurring waves of refugees from the Lombard-controlled interior to the Byzantine-held coast, often led by their bishops, and resulting in new settlements such as Torcello and Heraclia. Alboin moved west in his march, invading the region of Liguria (north-west Italy) and reaching its capital Mediolanum (Milan) on 3 September 569, only to find it already abandoned by the vicarius Italiae (vicar of Italy), the authority entrusted with the administration of the diocese of Annonarian Italy. Archbishop Honoratus, his clergy, and part of the laity accompanied the vicarius Italiae to find a safe haven in the Byzantine port of Genua (Genoa). Alboin counted the years of his reign from the capture of Milan, when he assumed the title of dominus Italiae (Lord of Italy). His success also meant the collapse of Byzantine defences in the northern part of the Po plain, and large movements of refugees to Byzantine areas. Several explanations have been advanced to explain the swiftness and ease of the initial Lombard advance in northern Italy. It has been suggested that the towns' doors may have been opened by the betrayal of the Gothic auxiliaries in the Byzantine army, but historians generally hold that Lombard success occurred because Italy was not considered by Byzantium as a vital part of the empire, especially at a time when the empire was imperilled by the attacks of Avars and Slavs in the Balkans and Sassanids in the east. The Byzantine decision not to contest the Lombard invasion reflects the desire of Justinian's successors to reorient the core of the Empire's policies eastward. Impact of the migration on Annonarian Italy The impact of the Lombard migration on the Late Roman aristocracy was disruptive, especially in combination with the Gothic War; the latter conflict had finished in the north only in 562, when the last Gothic stronghold, Verona, was taken. Many men of means (Paul's possessores) either lost their lives or their goods, but the exact extent of the despoliation of the Roman aristocracy is a subject of heated debate. The clergy was also greatly affected. The Lombards were mostly pagans, and displayed little respect for the clergy and Church property. Many churchmen left their sees to escape from the Lombards, like the two most senior bishops in the north, Honoratus and Paulinus. However, most of the suffragan bishops in the north sought an accommodation with the Lombards, as did in 569 the bishop of Tarvisium, Felix, when he journeyed to the Piave river to parley with Alboin, obtaining respect for the Church and its goods in return for this act of homage. It seems certain that many sees maintained an uninterrupted episcopal succession through the turmoil of the invasion and the following years. The transition was eased by the hostility existing among the northern Italian bishops towards the papacy and the empire due to the religious dispute involving the "Three-Chapter Controversy". In Lombard territory, churchmen were at least sure to avoid imperial religious persecution. In the view of Pierre Riché, the disappearance of 220 bishops' seats indicates that the Lombard migration was a crippling catastrophe for the Church. Yet according to Walter Pohl the regions directly occupied by Alboin suffered less devastation and had a relatively robust survival rate for towns, whereas the occupation of territory by autonomous military bands interested mainly in raiding and looting had a more severe impact, with the bishoprics in such places rarely surviving. Siege of Ticinum The first attested instance of strong resistance to Alboin's migration took place at the town of Ticinum (Pavia), which he started to besiege in 569 and captured only after three years. The town was of strategic importance, sitting at the confluence of the rivers Po and Ticino and connected by waterways to Ravenna, the capital of Byzantine Italy and the seat of the Praetorian prefecture of Italy. Its fall cut direct communications between the garrisons stationed on the Alpes Maritimae and the Adriatic coast. Careful to maintain the initiative against the Byzantines, by 570 Alboin had taken their last defences in northern Italy except for the coastal areas of Liguria and Venetia and a few isolated inland centres such as Augusta Praetoria (Aosta), Segusio (Susa), and the island of Amacina in the Larius Lucus (Lake Como). During Alboin's kingship the Lombards crossed the Apennines and plundered Tuscia, but historians are not in full agreement as to whether this took place under his guidance and if this constituted anything more than raiding. According to Herwig Wolfram, it was probably only in 578–579 that Tuscany was conquered, but Jörg Jarnut and others believe this began in some form under Alboin, although it was not completed by the time of his death. Alboin's problems in maintaining control over his people worsened during the siege of Ticinum. The nature of the Lombard monarchy made it difficult for a ruler to exert the same degree of authority over his subjects as had been exercised by Theodoric over his Goths, and the structure of the army gave great authority to the military commanders or duces, who led each band (fara) of warriors. Additionally, the difficulties encountered by Alboin in building a solid political entity resulted from a lack of imperial legitimacy, as unlike the Ostrogoths, they had not entered Italy as foederati but as enemies of the Empire. The king's disintegrating authority over his army was also manifested in the invasion of Frankish Burgundy which from 569 or 570 was subject to yearly raids on a major scale. The Lombard attacks were ultimately repelled following Mummolus' victory at Embrun. These attacks had lasting political consequences, souring the previously cordial Lombard-Frankish relations and opening the door to an alliance between the Empire and the Franks against the Lombards, a coalition agreed to by Guntram in about 571. Alboin is generally thought not to have been behind this invasion, but an alternative interpretation of the transalpine raids presented by Gian Piero Bognetti is that Alboin may actually have been involved in the offensive on Guntram as part of an alliance with the Frankish king of Austrasia, Sigebert I. This view is met with scepticism by scholars such as Chris Wickham. The weakening of royal authority may also have resulted in the conquest of much of southern Italy by the Lombards, in which modern scholars believe Alboin played no role at all, probably taking place in 570 or 571 under the auspices of individual warlords. However it is far from certain that the Lombard takeover occurred during those years, as very little is known of Faroald and Zotto's respective rises to power in Spoletium (Spoleto) and Beneventum (Benevento). Assassination Earliest narratives Ticinum eventually fell to the Lombards in either May or June 572. Alboin had in the meantime chosen Verona as his seat, establishing himself and his treasure in a royal palace built there by Theodoric. This choice may have been another attempt to link himself with the Gothic king. It was in this palace that Alboin was killed on 28 June 572. In the account given by Paul the Deacon, the most detailed narrative on Alboin's death, history and saga intermingle almost inextricably. Much earlier and shorter is the story told by Marius of Aventicum in his Chronica, written about a decade after Alboin's murder. According to his version the king was killed in a conspiracy by a man close to him, called Hilmegis (Paul's Helmechis), with the connivance of the queen. Helmichis then married the widow, but the two were forced to escape to Byzantine Ravenna, taking with them the royal treasure and part of the army, which hints at the cooperation of Byzantium. Roger Collins describes Marius as an especially reliable source because of his early date and his having lived close to Lombard Italy. Also contemporary is Gregory of Tours' account presented in the Historia Francorum, and echoed by the later Fredegar. Gregory's account diverges in several respects from most other sources. In his tale it is told how Alboin married the daughter of a man he had slain, and how she waited for a suitable occasion for revenge, eventually poisoning him. She had previously fallen in love with one of her husband's servants, and after the assassination tried to escape with him, but they were captured and killed. However, historians including Walter Goffart place little trust in this narrative. Goffart notes other similar doubtful stories in the Historia and calls its account of Alboin's demise "a suitably ironic tale of the doings of depraved humanity". Skull cup Elements present in Marius' account are echoed in Paul's Historia Langobardorum, which also contains distinctive features. One of the best known aspects unavailable in any other source is that of the skull cup. In Paul, the events that led to Alboin's downfall unfold in Verona. During a great feast, Alboin gets drunk and orders his wife Rosamund to drink from his cup, made from the skull of his father-in-law Cunimund after he had slain him in 567 and married Rosamund. Alboin "invited her to drink merrily with her father". This reignited the queen's determination to avenge her father. The tale has been often dismissed as a fable and Paul was conscious of the risk of disbelief. For this reason, he insists that he saw the skull cup personally during the 740s in the royal palace of Ticinum in the hands of king Ratchis. The use of skull cups has been noticed among nomadic peoples and, in particular, among the Lombards' neighbors, the Avars. Skull cups are believed to be part of a shamanistic ritual, where drinking from the cup was considered a way to assume the dead man's powers. In this context, Stefano Gasparri and Wilfried Menghen see in Cunimund's skull cup the sign of nomadic cultural influences on the Lombards: by drinking from his enemy's skull Alboin was taking his vital strength. As for the offering of the skull to Rosamund, that may have been a ritual request of complete submission of the queen and her people to the Lombards, and thus a cause of shame or humiliation. Alternatively, it may have been a rite to appease the dead through the offering of a libation. In the latter interpretation, the queen's answer reveals her determination not to let the wound opened by the killing of her father be healed through a ritual act, thus openly displaying her thirst for revenge. The episode is read in a radically different way by Walter Goffart. According to him, the whole story assumes an allegorical meaning, with Paul intent on telling an edifying story of the downfall of the hero and his expulsion from the promised land, because of his human weakness. In this story, the skull cup plays a key role as it unites original sin and barbarism. Goffart does not exclude the possibility that Paul had really seen the skull, but believes that by the 740s the connection between sin and barbarism as exemplified by the skull cup had already been established. Death In her plan to kill her husband Rosamund found an ally in Helmichis, the king's foster brother and spatharius (arms bearer). According to Paul the queen then recruited the king's cubicularius (bedchamberlain), Peredeo, into the plot, after having seduced him. When Alboin retired for his midday rest on 28 June, care was taken to leave the door open and unguarded. Alboin's sword was also removed, leaving him defenceless when Peredeo entered his room and killed him. Alboin's remains were allegedly buried beneath the palace steps. Peredeo's figure and role is mostly introduced by Paul; the Origo had for the first time mentioned his name as "Peritheus", but there his role had been different, as he was not the assassin, but the instigator of the assassination. In the vein of his reading of the skull cup, Goffart sees Peredeo not as a historical figure but as an allegorical character: he notes a similarity between Peredeo's name and the Latin word perditus, meaning "lost", a representation of those Lombards who entered into the service of the Empire. Alboin's death had a lasting impact, as it deprived the Lombards of the only leader they had that could have kept together the newborn Germanic entity. His end also represents the death of the last of the line of hero-kings that had led the Lombards through their migrations from the Elbe to Italy. His fame survived him for many centuries in epic poetry, with Saxons and Bavarians celebrating his prowess in battle, his heroism, and the magical properties of his weapons. Aftermath To complete the coup d'état and legitimize his claim to the throne, Helmichis married the queen, whose high standing arose not only from being the king's widow but also from being the most prominent member of the remaining Gepid nation, and as such her support was a guarantee of the Gepids' loyalty to Helmichis. The latter could also count on the support of the Lombard garrison of Verona, where many may have opposed Alboin's aggressive policy and could have cultivated the hope of reaching an entente with the Empire. The Byzantines were almost certainly deeply involved in the plot. It was in their interest to stem the Lombard tide by bringing a pro-Byzantine regime into power in Verona, and possibly in the long run break the unity of the Lombards' kingdom, winning over the dukes with honors and emoluments. The coup ultimately failed, as it met with the resistance of most of the warriors, who were opposed to the king's assassination. As a result, the Lombard garrison in Ticinum proclaimed Duke Cleph the new king, and Helmichis, rather than going to war against overwhelming odds, escaped to Ravenna with Longinus' assistance, taking with him his wife, his troops, the royal treasure and Alboin's daughter Albsuinda. In Ravenna the two lovers became estranged and killed each other. Subsequently, Longinus sent Albsuinda and the treasure to Constantinople. Cleph kept the throne for only 18 months before being assassinated by a slave. Possibly he too was killed at the instigation of the Byzantines, who had every interest in avoiding a hostile and solid leadership among the Lombards. An important success for the Byzantines was that no king was proclaimed to succeed Cleph, opening a decade of interregnum, thus making them more vulnerable to attacks from Franks and Byzantines. It was only when faced with the danger of annihilation by the Franks in 584 that the dukes elected a new king in the person of Authari, son of Cleph, who began the definitive consolidation and centralization of the Lombard kingdom while the remaining imperial territories were reorganized under the control of an exarch in Ravenna with the capacity to defend the country without the Emperor's assistance. The consolidation of Byzantine and Lombard dominions had long-lasting consequences for Italy, as the region was from that moment on fragmented among multiple rulers until Italian unification in 1871. Cultural references Alboin, together with other tribal leaders is mentioned in the 10th century Old English poem called Widsith (lines 70–75) : The historical period also formed the basis of the 1961 Italian adventure film Sword of the Conqueror (Italian: Rosmunda e Alboino, German title Alboin, König der Langobarden), with Jack Palance as Alboin. There have been several artistic depictions of events from Alboin's life including Peter Paul Rubens' Alboin and Rosamunde (1615); Charles Landseer's Assassination of Alboin, King of the Lombards (1856); and Fortunino Matania's illustration Rosamund captive before King Alboin of the Lombards (1942). See also List of kings of the Lombards Notes References Amory, Patrick. People and Identity in Ostrogothic Italy, 489–554. Cambridge: Cambridge University Press, 2003, . Ausenda, Giorgio. "Current issues and future directions in the study of Franks and Alamanni in the Merovingian period", Franks and Alamanni in the Merovingian Period: An Ethnographic Perspective. Ian Wood (ed.). Woodbridge: Boydell, 1998, pp. 371–455. . Azzara, Claudio. L'Italia dei barbari. Bologna: il Mulino, 2009, 978-88-15-08812-3. Bertolini, Paolo. "Alboino, re dei Longobardi", Dizionario Biografico degli Italiani. Alberto M. Ghisalberti (ed.). v. 2, Rome: Istituto dell'Enciclopedia Treccani, 1960, pp. 34–38. Christie, Neil. The Lombards: The Ancient Longobards. Oxford: Wiley-Blackwell, 1995 [1998], . Collins, Roger. Early Medieval Europe 300–1000. London: Macmillan, 1991, . Gasparri, Stefano. "I longobardi: alle origini del medioevo italiano". Storia Dossier, (1990) 42, Florence: Giunti. . Goffart, Walter. The Narrators of Barbarian History (A.D. 550–800): Jordanes, Gregory of Tours, Bede, and Paul the Deacon. Princeton: Princeton University Press, 1988, . Gregory of Tours. History of the Franks. Ernest Brehaut (translator). New York: Columbia University Press, 1916. Humphries, Mark. "Italy, A. D. 425–605", Cambridge Ancient History – Volume XIV: Late Antiquity: Empire and Successors, A. D. 425–600. Averil Cameron, Bryan Ward-Perkins and Michael Whitby (eds.). Cambridge: Cambridge University Press, 2001, pp. 525–552. . Lane, Frederic C.. Storia di Venezia. Turin: Einaudi, 1973 [1991], . Madden, Thomas F. "Aquileia", Medieval Italy: an encyclopedia. Christopher Kleinhenz (ed.). v. 1, New York: Routledge, 2004, pp. 44–45. . Martindale, John R. (ed.), Prosopography of the Later Roman Empire – Volume III: A.D. 527–641, Cambridge: Cambridge University Press, 1992, . Moorhead, John. "Ostrogothic Italy and the Lombard invasions", The New Cambridge Medieval History: Volume I c. 500 – c. 700. Paul Fouracre (ed.). Cambridge: Cambridge University Press, 2005, pp. 140–162. . Ostrogorsky, Georg. Storia dell'impero bizantino. Turin: Einaudi, 1963 [1993], . Palmieri, Stefano. "Duchi, Principi e Vescovi nella Longobardia meridionale", Longobardia e longobardi nell'Italia meridionale: le istituzioni ecclesiastiche. Giancarlo Andenna e Giorgio Picasso (eds.). Milan: Vita e Pensiero, 1996, pp. 43–99. . Paul the Deacon. History of the Langobards. William Dudley Foulke (translator). Philadelphia: University of Pennsylvania Press, 1907. Pohl, Walter. "The Empire and the Lombards: treaties and negotiations in the sixth century", Kingdoms of the Empire: the integration of barbarians in late Antiquity. Walter Pohl (ed.). Leiden: Brill, 1997, pp. 75–134. . Richards, Jeffrey. The Popes and the Papacy in the Early Middle Ages, 476–752. London: Routledge, 1979, . Rovagnati, Sergio. I Longobardi. Milan: Xenia, 2003, . Schutz, Herbert. Tools, Weapons and Ornaments: Germanic Material Culture in Pre-Carolingian Central Europe, 400–750. Leiden: Brill, 2001, . Whitby, Michael. "The successors of Justinian", The Cambridge Ancient History – Volume XIV. pp. 86–112. Wickham, Chris. Early Medieval Italy: Central Power and Local Society 400–1000. Ann Arbor: University of Michigan Press, 1981 [1989], . Wickham, Chris. Framing the Early Middle Ages: Europe and the Mediterranean, 400–800. Oxford: Oxford University Press, 2005, . Wolfram, Herwig. The Roman Empire and Its Germanic Peoples. Berkeley: University of California Press, 1990 [1997], . External links 530s births 572 deaths Year of birth uncertain 6th-century Lombard monarchs 6th-century murdered monarchs Lombard warriors Gausian dynasty Regicides	7
Afonso de Albuquerque, 1st Duke of Goa ( – 16 December 1515), was a Portuguese general, admiral, and statesman. He served as viceroy of Portuguese India from 1509 to 1515, during which he expanded Portuguese influence across the Indian Ocean and built a reputation as a fierce and skilled military commander. Albuquerque advanced the three-fold Portuguese grand scheme of combating Islam, spreading Christianity, and securing the trade of spices by establishing a Portuguese Asian empire. Among his achievements, Albuquerque managed to conquer Goa and was the first European of the Renaissance to raid the Persian Gulf, and he led the first voyage by a European fleet into the Red Sea. He is generally considered a highly effective military commander, and "probably the greatest naval commander of the age", given his successful strategy — he attempted to close all the Indian Ocean naval passages to the Atlantic, Red Sea, Persian Gulf, and to the Pacific, transforming it into a Portuguese mare clausum. He was appointed head of the "fleet of the Arabian and Persian sea" in 1506. Many of the conflicts in which he was directly involved took place in the Indian Ocean, in the Persian Gulf regions for control of the trade routes, and on the coasts of India. His military brilliance in these initial campaigns enabled Portugal to become the first global empire in history. He led the Portuguese forces in numerous battles, including the conquest of Goa in 1510 and the capture of Malacca in 1511. During the last five years of his life, he turned to administration, where his actions as the second governor of Portuguese India were crucial to the longevity of the Portuguese Empire. He oversaw expeditions that resulted in establishing diplomatic contacts with the Ayutthaya Kingdom through his envoy Duarte Fernandes, with Pegu in Myanmar, and Timor and the Moluccas through a voyage headed by António de Abreu and Francisco Serrão. He laid the path for European trade with Ming China through Rafael Perestrello. He also aided in establishing diplomatic relations with Ethiopia, and established diplomatic ties with Persia during the Safavid dynasty. Throughout his career, he received epithets such as "the Terrible", "the Great", "the Lion of the Seas", "the Portuguese Mars", and "the Caesar of the East". Early life Afonso de Albuquerque was born in 1453 in Alhandra, near Lisbon. He was the second son of Gonçalo de Albuquerque, Lord of Vila Verde dos Francos, and Dona Leonor de Menezes. His father held an important position at court and was connected by remote illegitimate descent with the Portuguese monarchy. He was a descendant of King Denis’s illegitimate son, Afonso Sanches, Lord of Albuquerque. He was educated in mathematics and Latin at the court of Afonso V of Portugal, where he befriended Prince John, the future King John II of Portugal. Early military service In 1471, under the command of Afonso V, he was present at the conquest of Tangier and Arzila in Morocco, and he served there as an officer for some years. In 1476, he accompanied Prince John in wars against Castile, including the Battle of Toro. He participated in the campaign on the Italian peninsula in 1480 to assist Ferdinand I of Naples in repelling the Ottoman invasion of Otranto. On his return in 1481, when John was crowned as King John II, Albuquerque was made master of the horse and chief equerry () to the king, a post which he held throughout John's reign. In 1489, he returned to military campaigning in North Africa, as commander of defense in the Graciosa fortress, an island in the river Luco near the city of Larache. In 1490 Albuquerque was part of the guard of John II. He returned to Arzila in 1495, where his younger brother Martim died fighting by his side. First expedition to India, 1503 When King Manuel I of Portugal ascended to the throne following the death of his cousin John II, he held a cautious attitude towards Albuquerque, who was a close friend of his predecessor and seventeen years Manuel's senior. Eight years later, on 6 April 1503 Albuquerque was sent on his first expedition to India together with his cousin Francisco de Albuquerque. Each commanded three ships, sailing with Duarte Pacheco Pereira and Nicolau Coelho. They engaged in several battles against the forces of the Zamorin of Calicut (Calecute, Kozhikode) and succeeded in establishing the king of Cochin (Cohim, Kochi) securely on his throne. In return, the king of Cochin gave the Portuguese permission to build the Portuguese fort Immanuel (Fort Kochi) and establish trade relations with Quilon (Coulão, Kollam). This laid the foundation for the eastern Portuguese Empire. Second expedition to India, 1506 Albuquerque returned home in July 1504 and was well received by King Manuel I. After he assisted with the creation of a strategy for the Portuguese efforts in the east, King Manuel entrusted him with the command of a squadron of five vessels in the fleet of sixteen sailing for India in early 1506, headed by Tristão da Cunha. The aim of the expedition was to conquer Socotra and build a fortress there, hoping to close the trade in the Red Sea. Albuquerque went as "chief-captain for the Coast of Arabia", sailing under da Cunha's orders until reaching Mozambique. He carried a sealed letter with a secret mission ordered by the king: after fulfilling the first mission, he was to replace the first viceroy of India, Francisco de Almeida, whose term ended two years later. Before departing, he legitimized his son Brás ("Braz" in the old Portuguese spelling), born to a common Portuguese woman named Joana Vicente in 1500. First conquest of Socotra and Ormuz, 1507 The fleet left Lisbon on 6 April 1506. Albuquerque piloted his ship himself, having lost his appointed pilot on departure. In Mozambique Channel, they rescued Captain João da Nova, who had encountered difficulties on his return from India; da Nova and his ship, the Frol de la mar, joined da Cunha's fleet. From Malindi, da Cunha sent envoys to Ethiopia, which at the time was thought to be closer to India than it actually is, under the aegis of Albuquerque. After failing to reach Ethiopia, he managed to land the envoys in Filuk. After successful attacks on Arab cities on the East African coast, the expedition conquered the island of Socotra and built a fortress at Suq, hoping to establish a base to stop the Red Sea commerce to the Indian Ocean. However, Socotra was abandoned four years later, as it was eventually realised to be a poor location for a base. At Socotra, they parted ways: Tristão da Cunha sailed for India, where he would relieve the Portuguese besieged at Cannanore, while Afonso took seven ships and 500 men to Ormuz in the Persian Gulf, one of the chief eastern centers of commerce. On his way, he conquered the cities of Curiati (Kuryat), Muscat in July 1507, and Khor Fakkan, accepting the submission of the cities of Kalhat and Sohar. He arrived at Hormuz on 25 September and soon captured the city, which agreed to become a tributary state of the Portuguese king. Ormuz was then a tributary state of Shah Ismail of Persia. In a famous episode, shortly after its conquest, Albuquerque was confronted by Persian envoys, who demanded the payment of the due tribute from him instead. He ordered them to be given a stock of cannonballs, arrows and weapons, retorting that "such was the currency struck in Portugal to pay the tribute demanded from the dominions of King Manuel". According to Brás de Albuquerque, it was Shah Ismael who first addressed Albuquerque as "Lion of the seas". Afonso began building the Fort of Our Lady of Victory (later renamed Fort of Our Lady of the Conception) on Hormuz Island, engaging his men of all ranks in the work. However, some of his officers, claiming that Afonso was exceeding his orders, revolted against the heavy work and climate and departed for India. With his fleet reduced to two ships and left without supplies, he was unable to maintain his position. In January 1508, he was forced to abandon Ormuz. He raided coastal villages to resupply the settlement of Socotra, returned to Ormuz, and then headed to India. Arrest at Cannanore, 1509 Afonso arrived at Cannanore on the Malabar coast in December 1508, where he opened the sealed letter that he had received from the king before the viceroy, Dom Francisco de Almeida, which named him as governor to succeed Almeida. The viceroy, supported by the officers who had abandoned Afonso at Ormuz, had a matching royal order but declined to yield. He protested that his term ended only in January and stated his intention to avenge his son's death by fighting the Mamluk fleet of Mirocem, refusing Afonso's offer to fight the Mamluk fleet himself. Afonso avoided confrontation, which could have led to civil war, and moved to Kochi, India, to await further instruction from the king. Increasingly isolated, he wrote to Diogo Lopes de Sequeira, who arrived in India with a new fleet, but was ignored as Sequeira joined Almeida. At the same time, Afonso refused approaches from opponents of Almeida who encouraged him to seize power. On 3 February 1509, Almeida fought the naval Battle of Diu against a joint fleet of Mamluks, Ottomans, the Zamorin of Calicut, and the Sultan of Gujarat. His victory was decisive: the Ottomans and Mamluks abandoned the Indian Ocean, easing the way for Portuguese rule there for the next century. In August, after a petition from Afonso's former officers with the support of Diogo Lopes de Sequeira claiming him unfit for governance, Afonso was sent in custody to St. Angelo Fort in Cannanore. There he remained under what he considered as imprisonment. Governor of Portuguese India, 1509–1515 Afonso was released after three months' confinement, on the arrival at Cannanore of the Marshal of Portugal Fernando Coutinho with a large fleet sent by the king. Coutinho was the most important Portuguese noble to visit India up to that point. He brought an armada of fifteen ships and 3,000 men to defend Afonso's rights, and to take Calicut. On 4 November 1509, Afonso became the second Governor of Portuguese India, a position he would hold until his death. Almeida set off to return to Portugal, but he was killed before he got there in a skirmish with the Khoekhoe. Upon his assuming office, Afonso intended to dominate the Muslim world and control the Spice trade. Initially, King Manuel I and his council in Lisbon tried to distribute the power by outlining three areas of jurisdiction in the Indian Ocean. In 1509, the nobleman Diogo Lopes de Sequeira was sent with a fleet to Southeast Asia, to seek an agreement with Sultan Mahmud Shah of Malacca, but failed and returned to Portugal. To Jorge de Aguiar was given the region between the Cape of Good Hope and Gujarat. He was succeeded by Duarte de Lemos, but left for Cochin and then for Portugal, leaving his fleet to Afonso. Conquest of Goa, 1510 In January 1510, obeying the orders from the king and aware of the absence of the Zamorin, Afonso advanced on Calicut. The attack was initially successful, but unravelled when Marshal Coutinho, infuriated by Albuquerque's success against Calicut and desiring glory for himself, attacked the Zamorin's palace against Albuquerque's advice, and was ambushed. During the retreat, Afonso was badly wounded and was forced to flee to the ships, barely escaping with his life, while Coutinho was killed. Soon after the failed attack, Afonso assembled a fleet of 23 ships and 1200 men. Contemporary reports state that he wanted to fight the Egyptian Mamluk Sultanate fleet in the Red Sea or return to Hormuz. However, he had been informed by Timoji (a privateer in the service of the Hindu Vijayanagara Empire) that it would be easier to fight them in Goa, where they had sheltered after the Battle of Diu, and also of the illness of the Sultan Yusuf Adil Shah, and war between the Deccan sultanates. So he relied on surprise in the capture of Goa from the Sultanate of Bijapur. A first assault took place in Goa from 4 March to 20 May 1510. After the initial occupation, feeling unable to hold the city given the poor condition of its fortifications, the cooling of Hindu residents' support and insubordination among his ranks following an attack by Ismail Adil Shah, Afonso refused a truce offered by the Sultan and abandoned the city in August. His fleet was scattered, and a palace revolt in Kochi hindered his recovery, so he headed to Fort Anjediva. New ships arrived from Portugal, which were intended for the nobleman Diogo Mendes de Vasconcelos at Malacca, who had been given a rival command of the region. Three months later, on 25 November Afonso reappeared at Goa with a renovated fleet. Diogo Mendes de Vasconcelos was compelled to accompany him with the reinforcements for Malacca and about 300 Malabari reinforcements from Cannanore. In less than a day, they took Goa from Ismail Adil Shah and his Ottoman allies, who surrendered on 10 December. It is estimated that 6000 of the 9000 Muslim defenders of the city died, either in the fierce battle in the streets or by drowning while trying to escape. Afonso regained the support of the Hindu population, although he frustrated the initial expectations of Timoji, who aspired to become governor. Afonso rewarded him by appointing him chief "Aguazil" of the city, an administrator and representative of the Hindu and Muslim people, as a knowledgeable interpreter of the local customs. He then made an agreement to lower the yearly tribute. In Goa, Afonso established the first Portuguese mint in the East, after Timoja's merchants had complained of the scarcity of currency, taking it as an opportunity to solidify the territorial conquest. The new coin, based on the existing local coins, showed a cross on the obverse and an armillary sphere (or "esfera"), King Manuel's badge, on the reverse. Gold cruzados or manueis, silver esferas and alf-esferas, and bronze "leais" were issued. Albuquerque founded at Goa the Hospital Real de Goa or Royal Hospital of Goa, by the Church of Santa Catarina. Upon hearing that the doctors were extorting the sickly with excessive fees, Albuquerque summoned them, declaring that "You charge a physician's pay and don't know what disease the men who serve our lord the King suffer from. Thus, I want to teach you what is it that they die from" and put them to work building the city walls all day till nightfall before releasing them. Despite constant attacks, Goa became the center of Portuguese India, with the conquest triggering the compliance of neighbouring kingdoms: the Sultan of Gujarat and the Zamorin of Calicut sent embassies, offering alliances and local grants to fortify. Afonso then used Goa to secure the spice trade in favor of Portugal and sell Persian horses to Vijayanagara and Hindu princes in return for their assistance. Conquest of Malacca, 1511 Afonso explained to his armies why the Portuguese wanted to capture Malacca: "The King of Portugal has often commanded me to go to the Straits, because...this was the best place to intercept the trade which the Moslems...carry on in these parts. So it was to do Our Lord's service that we were brought here; by taking Malacca, we would close the Straits so that never again would the Moslems be able to bring their spices by this route.... I am very sure that, if this Malacca trade is taken out of their hands, Cairo and Mecca will be completely lost." (The Commentaries of the Great Afonso de Albuquerque) In February 1511, through a friendly Hindu merchant, Nina Chatu, Afonso received a letter from Rui de Araújo, one of the nineteen Portuguese held at Malacca since 1509. It urged moving forward with the largest possible fleet to demand their release, and gave details of the fortifications. Afonso showed it to Diogo Mendes de Vasconcelos, as an argument to advance as a joint fleet. In April 1511, after fortifying Goa, he gathered a force of about 900 Portuguese, 200 Hindu mercenaries and about eighteen ships. He then sailed to Malacca against orders and despite the protest of Diogo Mendes, who claimed command of the expedition. Afonso eventually centralized the Portuguese government in the Indian Ocean. After the Malaccan conquest, he wrote a letter to the king to explain his disagreement with Diogo Mendes, suggesting that further divisions could be harmful to the Portuguese in India. Under his command was Ferdinand Magellan, who had participated in the failed embassy of Diogo Lopes de Sequeira in 1509. After a false start towards the Red Sea, they sailed to the Strait of Malacca. It was the richest city that the Portuguese tried to take, and a focal point in the trade network where Malay traders met Gujarati, Chinese, Japanese, Javanese, Bengali, Persian and Arabic, among others, described by Tomé Pires as of invaluable richness. Despite its wealth, it was mostly a wooden-built city, with few masonry buildings but was defended by a mercenary force estimated at 20,000 men and more than 2000 pieces of artillery. Its greatest weakness was the unpopularity of the government of Sultan Mahmud Shah, who favoured Muslims, arousing dissatisfaction amongst other merchants. Afonso made a bold approach to the city, his ships decorated with banners, firing cannon volleys. He declared himself lord of all the navigation, demanded the Sultan release the prisoners and pay for damages, and demanded consent to build a fortified trading post. The Sultan eventually freed the prisoners, but was unimpressed by the small Portuguese contingent. Afonso then burned some ships at the port and four coastal buildings as a demonstration. The city being divided by the Malacca River, the connecting bridge was a strategic point, so at dawn on 25 July, the Portuguese landed and fought a tough battle, facing poisoned arrows, taking the bridge in the evening. After fruitlessly waiting for the Sultan's reaction, they returned to the ships and prepared a junk (offered by Chinese merchants), filling it with men, artillery and sandbags. Commanded by António de Abreu, it sailed upriver at high tide to the bridge. The day after, all had landed. After a fierce fight during which the Sultan appeared with an army of war elephants, the defenders were dispersed and the Sultan fled. Afonso waited for the reaction of the Sultan. Merchants approached, asking for Portuguese protection. They were given banners to mark their premises, a sign that they would not be looted. On 15 August, the Portuguese attacked again, but the Sultan had fled the city. Under strict orders, they looted the city, but respected the banners. Afonso prepared Malacca's defenses against a Malay counterattack, building a fortress, assigning his men to shifts and using stones from the mosque and the cemetery. Despite the delays caused by heat and malaria, it was completed in November 1511, its surviving door now known as "A Famosa" ('the famous'). It was possibly then that Afonso had a large stone engraved with the names of the participants in the conquest. To quell disagreements over the order of the names, he had it set facing the wall, with the single inscription Lapidem quem reprobaverunt aedificantes (Latin for "The stone the builders rejected", from David's prophecy, Psalm 118:22–23) on the front. He settled the Portuguese administration, reappointing Rui de Araújo as factor, a post assigned before his 1509 arrest, and appointing rich merchant Nina Chatu to replace the previous Bendahara. Besides assisting in the governance of the city and the first Portuguese coinage, he provided the junks for several diplomatic missions. Meanwhile, Afonso arrested and had executed the powerful Javanese merchant Utimuti Raja who, after being appointed to a position in the Portuguese administration as representative of the Javanese population, had maintained contacts with the exiled royal family. Shipwreck on the Flor de la mar, 1511 On 20 November 1511 Afonso sailed from Malacca to the coast of Malabar on the old Flor de la Mar carrack that had served to support the conquest of Malacca. Despite its unsound condition, he used it to transport the treasure amassed in the conquest, given its large capacity. He wanted to give the court of King Manuel a show of Malaccan treasures. There were also offerings from the Ayutthaya Kingdom (Thailand) to the king of Portugal, and all his own fortune. On the voyage, the Flor de la Mar was wrecked in a storm, and Afonso barely escaped drowning. Missions from Malacca Embassies to Pegu, Sumatra and Siam, 1511 Most Muslim and Gujarati merchants having fled the city, Afonso invested in diplomatic efforts demonstrating generosity to Southeast Asian merchants, like the Chinese, to encourage good relations with the Portuguese. Trade and diplomatic missions were sent to continental kingdoms: Rui Nunes da Cunha was sent to Pegu (Burma), from where King Binyaram sent back a friendly emissary to Kochi in 1514 and Sumatra, Sumatran kings of Kampar and Indragiri sending emissaries to Afonso accepting the new power, as vassal states of Malacca. Knowing of Siamese ambitions over Malacca, Afonso sent Duarte Fernandes in a diplomatic mission to the Ayutthaya Kingdom (Thailand), returning in a Chinese junk. He was one of the Portuguese who had been arrested in Malacca, having gathered knowledge about the culture of the region. There he was the first European to arrive, establishing amicable relations between the kingdom of Portugal and the court of the king of Siam Ramathibodi II, returning with a Siamese envoy bearing gifts and letters to Afonso and the king of Portugal. Expedition to the "spice islands" (Maluku islands), 1512 In November, after having secured Malacca and learning the location of the then secret "spice islands", Afonso sent three ships to find them, led by trusted António de Abreu with deputy commander Francisco Serrão. Malay sailors were recruited to guide them through Java, the Lesser Sunda Islands and the Ambon Island to Banda Islands, where they arrived in early 1512. There they remained for a month, buying and filling their ships with nutmeg and cloves. António de Abreu then sailed to Amboina whilst Serrão sailed towards the Moluccas, but he was shipwrecked near Seram. Sultan Abu Lais of Ternate heard of their stranding, and, seeing a chance to ally himself with a powerful foreign nation, brought them to Ternate in 1512 where they were permitted to build a fort on the island, the , built in 1522. Return to Cochin and Goa Afonso returned from Malacca to Cochin, but could not sail to Goa as it faced a serious revolt headed by the forces of Ismael Adil Shah, the Sultan of Bijapur, commanded by Rasul Khan and his countrymen. During Afonso's absence from Malacca, the Portuguese who opposed the taking of Goa had waived its possession, even writing to the king that it would be best to let it go. Held up by the monsoon and with few forces available, Afonso had to wait for the arrival of reinforcement fleets headed by his nephew D. Garcia de Noronha, and Jorge de Mello Pereira. While at Cochin, Albuquerque started a school. In a private letter to King Manuel I, he stated that he had found a chest full of books with which to teach the children of married Portuguese settlers (casados) and Christian converts, of which there were about a hundred, to read and write. On 10 September 1512, Afonso sailed from Cochin to Goa with fourteen ships carrying 1,700 soldiers. Determined to recapture the fortress, he ordered trenches dug and a wall breached. But on the day of the planned final assault, Rasul Khan surrendered. Afonso demanded the fort be handed over with its artillery, ammunition and horses, and the deserters to be given up. Some had joined Rasul Khan when the Portuguese were forced to flee Goa in May 1510, others during the recent siege. Rasul Khan consented, on condition that their lives be spared. Afonso agreed and he left Goa. He did spare the lives of the deserters, but had them horribly mutilated. One such renegade was Fernão Lopes, bound for Portugal in custody, who escaped at the island of Saint Helena and led a 'Robinson Crusoe' life for many years. After such measures the town became the most prosperous Portuguese settlement in India. Campaign in the Red Sea, 1513 In December 1512 an envoy from Ethiopia arrived at Goa. Mateus was sent by the regent queen Eleni, following the arrival of the Portuguese from Socotra in 1507, as an ambassador for the king of Portugal in search of a coalition to help face growing Muslim influence. He was received in Goa with great honour by Afonso, as a long-sought "Prester John" envoy. His arrival was announced by King Manuel to Pope Leo X in 1513. Although Mateus faced the distrust of Afonso's rivals, who tried to prove he was some impostor or Muslim spy, Afonso sent him to Portugal. The king is described as having wept with joy at their report. In February 1513, while Mateus was in Portugal, Afonso sailed to the Red Sea with a force of about 1000 Portuguese and 400 Malabaris. He was under orders to secure that channel for Portugal. Socotra had proved ineffective to control the Red Sea entrance and was abandoned, and Afonso's hint that Massawa could be a good Portuguese base might have been influenced by Mateus' reports. Knowing that the Mamluks were preparing a second fleet at Suez, he wanted to advance before reinforcements arrived in Aden, and accordingly laid siege to the city. Aden was a fortified city, but although he had scaling ladders they broke during the chaotic attack. After half a day of fierce battle, Afonso was forced to retreat. He cruised the Red Sea inside the Bab al-Mandab, with the first European fleet to have sailed this route. He attempted to reach Jeddah, but the winds were unfavourable and so he sheltered at Kamaran island in May, until sickness among the men and lack of fresh water forced him to retreat. In August 1513, after a second attempt to reach Aden, he returned to India with no substantial results. In order to destroy the power of Egypt, he wrote to King Manuel of the idea of diverting the course of the Nile river to render the whole country barren. He also intended to steal the body of the Islamic prophet, Muhammad, and hold it for ransom until all Muslims had left the Holy Land. Although Albuquerque's expedition failed to reach Suez, such an incursion into the Red Sea by a Christian fleet for the first time in history stunned the Muslim world, and panic spread in Cairo. Submission of Calicut Albuquerque achieved during his term a favourable end to hostilities between the Portuguese and the Zamorin of Calicut, which had lasted since the massacre of the Portuguese in Calicut in 1502. As naval trade faltered and vassals defected, with no foreseeable solutions to the conflict with the Portuguese, the court of the Zamorin fell to in-fighting. The ruling Zamorin was assassinated and replaced by a rival, under the instigation of Albuquerque, permitting peace talks to commence. The Portuguese were allowed to build a fortress in Calicut itself, and acquired rights to obtain as much pepper and ginger as they wished, at stipulated prices, and half the customs duties of Calicut as yearly tribute. Construction of the fortress began immediately, under the supervision of chief architect Tomás Fernandes. Administration and diplomacy in Goa, 1514 With peace concluded, in 1514 Afonso devoted himself to governing Goa and receiving embassies from Indian governors, strengthening the city and encouraging marriages of Portuguese men and local women. At that time, Portuguese women were barred from traveling overseas in order to maintain discipline among the men on board the ships. In 1511 under a policy which Afonso promulgated, the Portuguese government encouraged their explorers to marry local women. To promote settlement, the King of Portugal granted freeman status and exemption from Crown taxes to Portuguese men (known as casados, or "married men") who ventured overseas and married local women. With Afonso's encouragement, mixed marriages flourished, giving birth to Portuguese-Indians or mestiços. He appointed local people for positions in the Portuguese administration and did not interfere with local traditions (except "sati", the practice of immolating widows, which he banned). In March 1514 King Manuel sent to Pope Leo X a huge and exotic embassy led by Tristão da Cunha, who toured the streets of Rome in an extravagant procession of animals from the colonies and wealth from the Indies. His reputation reached its peak, laying foundations of the Portuguese Empire in the East. In early 1514, Afonso sent ambassadors to Gujarat's Sultan Muzaffar Shah II, ruler of Cambay, to seek permission to build a fort on Diu, India. The mission returned without an agreement, but diplomatic gifts were exchanged, including an Indian rhinoceros, Afonso sent the rhino to King Manuel, making it the first living example of a rhinoceros seen in Europe since the Roman Empire. Conquest of Ormuz and Illness In 1513, at Cannanore, Afonso was visited by a Persian ambassador from Shah Ismail I, who had sent ambassadors to Gujarat, Ormuz and Bijapur. The shah's ambassador to Bijapur invited Afonso to send back an envoy to Persia. Miguel Ferreira was sent via Ormuz to Tabriz, where he had several interviews with the shah about common goals of defeating the Mamluk sultan. At the same time, Albuquerque decided to conclude the effective conquest of Hormuz. He had learned that after the Portuguese retreat in 1507, a young king was reigning under the influence of a powerful Persian vizier, Reis Hamed, whom the king greatly feared. At Ormuz in March 1515, Afonso met the king and asked the vizier to be present. He then had him immediately stabbed and killed by his entourage, thus "freeing" the terrified king, so the island in the Persian Gulf yielded to him without resistance and remained a vassal state of the Portuguese Empire. Ormuz itself would not be Persian territory for another century, until an English-Persian alliance finally expelled the Portuguese in 1622. At Ormuz, Afonso met with Miguel Ferreira, returning with rich presents and an ambassador, carrying a letter from the Persian potentate Shah Ismael, inviting Afonso to become a leading lord in Persia. There he remained, engaging in diplomatic efforts, receiving envoys and overseeing the construction of the new fortress, while becoming increasingly ill. His illness was reported as early as September 1515. In November 1515, he embarked on a journey back to Goa. Death At this time, his political enemies at the Portuguese court were planning his downfall. They had lost no opportunity in stirring up the jealousy of King Manuel against him, insinuating that Afonso intended to usurp power in Portuguese India. While on his return voyage from Ormuz in the Persian Gulf, near the harbor of Chaul, he received news of a Portuguese fleet arriving from Europe, bearing dispatches announcing that he was to be replaced by his personal foe, Lopo Soares de Albergaria. Realizing the plot that his enemies had moved against him, profoundly disillusioned, he voiced his bitterness: "Grave must be my sins before the King, for I am in ill favor with the King for love of the men, and with the men for love of the King." Feeling himself near death, he donned the surcoat of the Order of Santiago, of which he was a knight, and drew up his will, appointed the captain and senior officials of Ormuz, and organized a final council with his captains to decide the main matters affecting the Portuguese State of India. He wrote a brief letter to King Manuel, asking him to confer onto his natural son "all of the high honors and rewards" that Afonso had received, and assuring Manuel of his loyalty. On 16 December 1515, Afonso de Albuquerque died within sight of Goa. As his death was known, in the city "great wailing arose", and many took to the streets to witness his body carried on a chair by his main captains, in a procession lit by torches amidst the crowd. Afonso's body was buried in Goa, according to his will, in the Church of Nossa Senhora da Serra (Our Lady of the Hill), which he had been built in 1513 to thank the Madonna for his escape from Kamaran island. That night, the population of Goa, both Hindu and Portuguese, gathered to mourn his death. In Portugal, King Manuel's zigzagging policies continued, still trapped by the constraints of real-time medieval communication between Lisbon and India and unaware that Afonso was dead. Hearing rumours that the Mamluk Sultan of Egypt was preparing a magnificent army at Suez to prevent the conquest of Ormuz, he repented of having replaced Afonso, and in March 1516 urgently wrote to Albergaria to return the command of all operations to Afonso and provide him with resources to face the Egyptian threat. He organized a new Portuguese navy in Asia, with orders that Afonso (if he was still in India), be made commander-in-chief against the Sultan of Cairo's armies. Manuel would afterwards learn that Afonso had died many months earlier, and that his reversed decision had been delivered many months too late. After 51 years, in 1566, his body was moved to Nossa Senhora da Graça church in Lisbon, which was ruined and rebuilt after the 1755 Great Lisbon earthquake. Legacy King Manuel I of Portugal was belatedly convinced of Afonso's loyalty, and endeavoured to atone for his lack of confidence in Afonso by heaping honours upon his son, Brás de Albuquerque (1500–1580), whom he renamed "Afonso" in memory of the father. Afonso de Albuquerque was a prolific writer, having sent numerous letters during his governorship, covering topics from minor issues to major strategies. In 1557 his son published his biography under the title Commentarios do Grande Affonso d'Alboquerque. In 1572, Afonso's actions were described in The Lusiads, the Portuguese main epic poem by Luís Vaz de Camões (Canto X, strophes 40–49). The poet praises his achievements, but has the muses frown upon the harsh rule of his men, of whom Camões was almost a contemporary fellow. In 1934, Afonso was celebrated by Fernando Pessoa in Mensagem, a symbolist epic. In the first part of this work, called "Brasão" (Coat-of-Arms), he relates Portuguese historical protagonists to each of the fields in the Portuguese coat-of-arms, Afonso being one of the wings of the griffin headed by Henry the Navigator, the other wing being King John II. A variety of mango, which was created by Portuguese Jesuits in Goa via grafting techniques, was named in his honour. Numerous homages have been paid to Afonso; he is featured in the Padrão dos Descobrimentos monument; there is a square named after him in Lisbon, which also features a bronze statue, and two Portuguese Navy ships have been named in his honour: the sloop NRP Afonso de Albuquerque (1884) and the warship NRP Afonso de Albuquerque. Titles and honours Captain-Major of the Sea of Arabia 2nd Governor of India 1st Duke of Goa A knight of the Portuguese Order of Saint James of the Sword Fidalgo of the Royal Household Notes References Citations Bibliography In other languages Albuquerque, Afonso de, D. Manuel I, António Baião, "Cartas para el-rei d". Manuel I", Editora Livraria Sá de Costa (1957) Primary sources External links Paul Lunde, The coming of the Portuguese, 2006, Saudi Aramco World Works of Afonso de Albuquerque at the National Digital Library of Portugal Portuguese explorers Explorers of Asia Explorers of India Viceroys of Portuguese India Date of birth unknown 1450s births 1515 deaths Portuguese admirals Portuguese colonial governors and administrators Portuguese generals Portuguese Renaissance writers Portuguese Roman Catholics People from Vila Franca de Xira Colonial Goa Colonial Kerala Maritime history of Portugal Portuguese in Kerala History of Kollam Shipwreck survivors 1510s in Portuguese India 16th-century Portuguese people Portuguese nobility	8
Alcaeus of Mytilene (; , Alkaios ho Mutilēnaios; – BC) was a lyric poet from the Greek island of Lesbos who is credited with inventing the Alcaic stanza. He was included in the canonical list of nine lyric poets by the scholars of Hellenistic Alexandria. He was a contemporary of Sappho, with whom he may have exchanged poems. He was born into the aristocratic governing class of Mytilene, the main city of Lesbos, where he was involved in political disputes and feuds. Biography The broad outlines of the poet's life are well known. He was born into the aristocratic, warrior class that dominated Mytilene, the strongest city-state on the island of Lesbos and, by the end of the seventh century BC, the most influential of all the North Aegean Greek cities, with a strong navy and colonies securing its trade-routes in the Hellespont. The city had long been ruled by kings born to the Penthilid clan but, during the poet's life, the Penthilids were a spent force and rival aristocrats and their factions contended with each other for supreme power. Alcaeus and his older brothers were passionately involved in the struggle but experienced little success. Their political adventures can be understood in terms of three tyrants who came and went in succession: Melanchrus – he was overthrown sometime between 612 BC and 609 BC by a faction that, in addition to the brothers of Alcaeus, included Pittacus (later renowned as one of the Seven Sages of Greece); Alcaeus at that time was too young to be actively involved; Myrsilus – it is not known when he came to power but some verses by Alcaeus (frag. 129) indicate that the poet, his brothers and Pittacus made plans to overthrow him and that Pittacus subsequently betrayed them; Alcaeus and his brothers fled into exile where the poet later wrote a drinking song in celebration of the news of the tyrant's death (frag. 332); Pittacus – the dominant political figure of his time, he was voted supreme power by the political assembly of Mytilene and appears to have governed well (590-580 BC), even allowing Alcaeus and his faction to return home in peace. Sometime before 600 BC, Mytilene fought Athens for control of Sigeion and Alcaeus was old enough to participate in the fighting. According to the historian Herodotus, the poet threw away his shield to make good his escape from the victorious Athenians then celebrated the occasion in a poem that he later sent to his friend, Melanippus. It is thought that Alcaeus travelled widely during his years in exile, including at least one visit to Egypt. His older brother, Antimenidas, appears to have served as a mercenary in the army of Nebuchadnezzar II and probably took part in the conquest of Askelon. Alcaeus wrote verses in celebration of Antimenides' return, including mention of his valour in slaying the larger opponent (frag. 350), and he proudly describes the military hardware that adorned their family home (frag. 357). Alcaeus was a contemporary and a countryman of Sappho and, since both poets composed for the entertainment of Mytilenean friends, they had many opportunities to associate with each other on a quite regular basis, such as at the Kallisteia, an annual festival celebrating the island's federation under Mytilene, held at the 'Messon' (referred to as temenos in frs. 129 and 130), where Sappho performed publicly with female choirs. Alcaeus' reference to Sappho in terms more typical of a divinity, as holy/pure, honey-smiling Sappho (fr. 384), may owe its inspiration to her performances at the festival. The Lesbian or Aeolic school of poetry "reached in the songs of Sappho and Alcaeus that high point of brilliancy to which it never after-wards approached" and it was assumed by later Greek critics and during the early centuries of the Christian era that the two poets were in fact lovers, a theme which became a favourite subject in art (as in the urn pictured above). Poetry The poetic works of Alcaeus were collected into ten books, with elaborate commentaries, by the Alexandrian scholars Aristophanes of Byzantium and Aristarchus of Samothrace sometime in the 3rd century BC, and yet his verses today exist only in fragmentary form, varying in size from mere phrases, such as wine, window into a man (fr. 333) to entire groups of verses and stanzas, such as those quoted below (fr. 346). Alexandrian scholars numbered him in their canonic nine (one lyric poet per Muse). Among these, Pindar was held by many ancient critics to be pre-eminent, but some gave precedence to Alcaeus instead. The canonic nine are traditionally divided into two groups, with Alcaeus, Sappho and Anacreon, being 'monodists' or 'solo-singers', with the following characteristics: They composed and performed personally for friends and associates on topics of immediate interest to them; They wrote in their native dialects (Alcaeus and Sappho in Aeolic dialect, Anacreon in Ionic); They preferred quite short, metrically simple stanzas or 'strophes' which they re-used in many poems – hence the 'Alcaic' and 'Sapphic' stanzas, named after the two poets who perfected them or possibly invented them. The other six of the canonic nine composed verses for public occasions, performed by choruses and professional singers and typically featuring complex metrical arrangements that were never reproduced in other verses. However, this division into two groups is considered by some modern scholars to be too simplistic and often it is practically impossible to know whether a lyric composition was sung or recited, or whether or not it was accompanied by musical instruments and dance. Even the private reflections of Alcaeus, ostensibly sung at dinner parties, still retain a public function. Critics often seek to understand Alcaeus in comparison with Sappho: The Roman poet, Horace, also compared the two, describing Alcaeus as "more full-throatedly singing" – see Horace's tribute below. Alcaeus himself seems to underscore the difference between his own 'down-to-earth' style and Sappho's more 'celestial' qualities when he describes her almost as a goddess (as cited above), and yet it has been argued that both poets were concerned with a balance between the divine and the profane, each emphasising different elements in that balance. Dionysius of Halicarnassus exhorts us to "Observe in Alcaeus the sublimity, brevity and sweetness coupled with stern power, his splendid figures, and his clearness which was unimpaired by the dialect; and above all mark his manner of expressing his sentiments on public affairs", while Quintilian, after commending Alcaeus for his excellence "in that part of his works where he inveighs against tyrants and contributes to good morals; in his language he is concise, exalted, careful and often like an orator"; goes on to add: "but he descended into wantonness and amours, though better fitted for higher things". Poetic genres The works of Alcaeus are conventionally grouped according to five genres. Political songs: Alcaeus often composed on a political theme, covering the power struggles on Lesbos with the passion and vigour of a partisan, cursing his opponents, rejoicing in their deaths, delivering blood-curdling homilies on the consequences of political inaction and exhorting his comrades to heroic defiance, as in one of his 'ship of state' allegories. Commenting on Alcaeus as a political poet, the scholar Dionysius of Halicarnassus once observed that "if you removed the meter you would find political rhetoric". Drinking songs: According to the grammarian Athenaeus, Alcaeus made every occasion an excuse for drinking and he has provided posterity several quotes in proof of it. Alcaeus exhorts his friends to drink in celebration of a tyrant's death, to drink away their sorrows, to drink because life is short and along the lines in vino veritas, to drink through winter storms and to drink through the heat of summer. The latter poem in fact paraphrases verses from Hesiod, re-casting them in Asclepiad meter and Aeolian dialect. Hymns: Alcaeus sang about the gods in the spirit of the Homeric hymns, to entertain his companions rather than to glorify the gods and in the same meters that he used for his 'secular' lyrics. There are for example fragments in 'Sapphic' meter praising the Dioscuri, Hermes and the river Hebrus (a river significant in Lesbian mythology since it was down its waters that the head of Orpheus was believed to have floated singing, eventually crossing the sea to Lesbos and ending up in a temple of Apollo, as a symbol of Lesbian supremacy in song). According to Porphyrion, the hymn to Hermes was imitated by Horace in one of his own 'sapphic' odes (C.1.10: Mercuri, facunde nepos Atlantis). Love songs: Almost all Alcaeus' amorous verses, mentioned with disapproval by Quintilian above, have vanished without trace. There is a brief reference to his love poetry in a passage by Cicero. Horace, who often wrote in imitation of Alcaeus, sketches in verse one of the Lesbian poet's favourite subjects – Lycus of the black hair and eyes (C.1.32.11–12: nigris oculis nigroque/crine decorum). It is possible that Alcaeus wrote amorously about Sappho, as indicated in an earlier quote. Miscellaneous: Alcaeus wrote on such a wide variety of subjects and themes that contradictions in his character emerge. The grammarian Athenaeus quoted some verses about perfumed ointments to prove just how unwarlike Alcaeus could be and he quoted his description of the armour adorning the walls of his house as proof that he could be unusually warlike for a lyric poet. Other examples of his readiness for both warlike and unwarlike subjects are lyrics celebrating his brother's heroic exploits as a Babylonian mercenary and lyrics sung in a rare meter (Sapphic Ionic in minore) in the voice of a distressed girl, "Wretched me, who share in all ills!" – possibly imitated by Horace in an ode in the same meter (C.3.12: Miserarum est neque amori dare ludum neque dulci). He also wrote Sapphic stanzas on Homeric themes but in un-Homeric style, comparing Helen of Troy unfavourably with Thetis, the mother of Achilles. A drinking poem (fr. 346) The following verses demonstrate some key characteristics of the Alcaic style (square brackets indicate uncertainties in the ancient text): The Greek meter here is relatively simple, comprising the Greater Asclepiad, adroitly used to convey, for example, the rhythm of jostling cups (). The language of the poem is typically direct and concise and comprises short sentences — the first line is in fact a model of condensed meaning, comprising an exhortation ("Let's drink!"), a rhetorical question ("Why are we waiting for the lamps?") and a justifying statement ("Only an inch of daylight left"). The meaning is clear and uncomplicated, the subject is drawn from personal experience, and there is an absence of poetic ornament, such as simile or metaphor. Like many of his poems (e.g., frs. 38, 326, 338, 347, 350), it begins with a verb (in this case "Let's drink!") and it includes a proverbial expression ("Only an inch of daylight left") though it is possible that he coined it himself. A hymn (fr. 34) Alcaeus rarely used metaphor or simile and yet he had a fondness for the allegory of the storm-tossed ship of state. The following fragment of a hymn to Castor and Polydeuces (the Dioscuri) is possibly another example of this though some scholars interpret it instead as a prayer for a safe voyage. The poem was written in Sapphic stanzas, a verse form popularly associated with his compatriot, Sappho, but in which he too excelled, here paraphrased in English to suggest the same rhythms. There were probably another three stanzas in the original poem but only nine letters of them remain. The 'far-away light' () is a reference to St. Elmo's Fire, an electrical discharge supposed by ancient Greek mariners to be an epiphany of the Dioscuri, but the meaning of the line was obscured by gaps in the papyrus until reconstructed by a modern scholar; such reconstructions are typical of the extant poetry (see Scholars, fragments and sources below). This poem does not begin with a verb but with an adverb (Δευτέ) but still communicates a sense of action. He probably performed his verses at drinking parties for friends and political allies – men for whom loyalty was essential, particularly in such troubled times. Tributes from other poets Horace The Roman poet Horace modelled his own lyrical compositions on those of Alcaeus, rendering the Lesbian poet's verse-forms, including 'Alcaic' and 'Sapphic' stanzas, into concise Latin – an achievement he celebrates in his third book of odes. In his second book, in an ode composed in Alcaic stanzas on the subject of an almost fatal accident he had on his farm, he imagines meeting Alcaeus and Sappho in Hades: Ovid Ovid compared Alcaeus to Sappho in Letters of the Heroines, where Sappho is imagined to speak as follows: Scholars, fragments and sources The story of Alcaeus is partly the story of the scholars who rescued his work from oblivion. His verses have not come down to us through a manuscript tradition – generations of scribes copying an author's collected works, such as delivered intact into the modern age four entire books of Pindar's odes – but haphazardly, in quotes from ancient scholars and commentators whose own works have chanced to survive, and in the tattered remnants of papyri uncovered from an ancient rubbish pile at Oxyrhynchus and other locations in Egypt: sources that modern scholars have studied and correlated exhaustively, adding little by little to the world's store of poetic fragments. Ancient scholars quoted Alcaeus in support of various arguments. Thus for example Heraclitus "The Allegorist" quoted fr. 326 and part of fr. 6, about ships in a storm, in his study on Homer's use of allegory. The hymn to Hermes, fr308(b), was quoted by Hephaestion and both he and Libanius, the rhetorician, quoted the first two lines of fr. 350, celebrating the return from Babylon of Alcaeus' brother. The rest of fr. 350 was paraphrased in prose by the historian/geographer Strabo. Many fragments were supplied in quotes by Athenaeus, principally on the subject of wine-drinking, but fr. 333, "wine, window into a man", was quoted much later by the Byzantine grammarian, John Tzetzes. The first 'modern' publication of Alcaeus' verses appeared in a Greek and Latin edition of fragments collected from the canonic nine lyrical poets by Michael Neander, published at Basle in 1556. This was followed by another edition of the nine poets, collected by Henricus Stephanus and published in Paris in 1560. Fulvius Ursinus compiled a fuller collection of Alcaic fragments, including a commentary, which was published at Antwerp in 1568. The first separate edition of Alcaeus was by Christian David Jani and it was published at Halle in 1780. The next separate edition was by August Matthiae, Leipzig 1827. Some of the fragments quoted by ancient scholars were able to be integrated by scholars in the nineteenth century. Thus for example two separate quotes by Athenaeus were united by Theodor Bergk to form fr. 362. Three separate sources were combined to form fr. 350, as mentioned above, including a prose paraphrase from Strabo that first needed to be restored to its original meter, a synthesis achieved by the united efforts of Otto Hoffmann, Karl Otfried Müller and Franz Heinrich Ludolf Ahrens. The discovery of the Oxyrhynchus papyri towards the end of the nineteenth century dramatically increased the scope of scholarly research. In fact, eight important fragments have now been compiled from papyri – frs. 9, 38A, 42, 45, 34, 129, 130 and most recently S262. These fragments typically feature lacunae or gaps that scholars fill with 'educated guesses', including for example a "brilliant supplement" by Maurice Bowra in fr. 34, a hymn to the Dioscuri that includes a description of St. Elmo's fire in the ship's rigging. Working with only eight letters (; tr. pró...tr...ntes), Bowra conjured up a phrase that develops the meaning and the euphony of the poem (; tr. próton' ontréchontes), describing luminescence "running along the forestays". References Sources Sappho et Alcaeus. Fragmenta. Eva-Maria Voigt (ed.). Polak and van Gennep, Amsterdam, 1971. Greek Lyric Poetry. D.A. Campbell (ed.). Bristol Classical Press, London, 1982. Greek Lyric 1: Sappho and Alcaeus. D. A. Campbell (ed.). Harvard University Press, Cambridge, Mass., 1982. Alcée. Fragments. Gauthier Liberman (ed.). Collection Budé, Paris, 1999. Sappho and the Greek Lyric Poets. Translated by Willis Barnstone. Schoken Books Inc., New York, 1988. External links Poems by Alcaeus – English translations A. M. Miller, Greek Lyric: – Alcaeus, many fragments Alcaeus Bilingual Anthology (in Greek and English, side by side) 620s BC births Year of birth unknown 6th-century BC deaths Year of death unknown Nine Lyric Poets Aeolic Greek poets Ancient Greek political refugees Ancient Mytileneans Poets from ancient Lesbos 6th-century BC Greek people 6th-century BC poets	5
Alexios I Komnenos (, 1057 – 15 August 1118; Latinized Alexius I Comnenus) was Byzantine emperor from 1081 to 1118. Although he was not the first emperor of the Komnenian dynasty, it was during his reign that the Komnenos family came to full power and initiated a hereditary succession to the throne. Inheriting a collapsing empire and faced with constant warfare during his reign against both the Seljuq Turks in Asia Minor and the Normans in the western Balkans, Alexios was able to curb the Byzantine decline and begin the military, financial, and territorial recovery known as the Komnenian restoration. His appeals to Western Europe for help against the Turks was the catalyst that sparked the First Crusade. Biography Alexios was the son of John Komnenos and Anna Dalassene, and the nephew of Isaac I Komnenos (emperor 1057–1059). Alexios' father declined the throne on the abdication of Isaac, who was thus succeeded by Constantine X Doukas (r. 1059–1067) and died as a monk in 1067. Alexios and his elder brother, Manuel Komnenos served under Romanos IV Diogenes (r. 1068–1071) with distinction against the Seljuk Turks. Under Michael VII Doukas Parapinakes (1071–1078) and Nikephoros III Botaneiates (1078–1081), he was militarily employed, along with his elder brother Isaac, against rebels in Asia Minor, Thrace, and in Epirus. In 1074, western mercenaries led by Roussel de Bailleul rebelled in Asia Minor, but Alexios successfully subdued them by 1076. In 1078, he was appointed commander of the field army in the West by Nikephoros III. In this capacity, Alexios defeated the rebellions of Nikephoros Bryennios the Elder (whose son or grandson later married Alexios' daughter Anna) and Nikephoros Basilakes, the first at the Battle of Kalavrye and the latter in a surprise night attack on his camp. Alexios was ordered to march against his brother-in-law Nikephoros Melissenos in Asia Minor but refused to fight his kinsman. This did not, however, lead to a demotion, as Alexios was needed to counter the expected invasion of the Normans of Southern Italy, led by Robert Guiscard. Conspiracy and revolt of the Komnenoi against Botaneiates While Byzantine troops were assembling for the expedition, the Doukas faction at court approached Alexios and convinced him to join a conspiracy against Nikephoros III. The mother of Alexios, Anna Dalassene, was to play a prominent role in this coup d'état of 1081, along with the current empress, Maria of Alania. First married to Michael VII Doukas and secondly to Nikephoros III Botaneiates, she was preoccupied with the future of her son by Michael VII, Constantine Doukas. Nikephoros III intended to leave the throne to one of his close relatives, and this resulted in Maria's ambivalence and alliance with the Komnenoi, though the real driving force behind this political alliance was Anna Dalassene. The empress was already closely connected to the Komnenoi through Maria's cousin Irene's marriage to Isaac Komnenos, so the Komnenoi brothers were able to see her under the pretense of a friendly family visit. Furthermore, to aid the conspiracy Maria had adopted Alexios as her son, though she was only five years older than he. Maria was persuaded to do so on the advice of her own "Alans" and her eunuchs, who had been instigated by Isaac Komnenos. Given Anna's tight hold on her family, Alexios must have been adopted with her implicit approval. As a result, Alexios and Constantine, Maria's son, were now adoptive brothers, and both Isaac and Alexios took an oath that they would safeguard his rights as emperor. By secretly giving inside information to the Komnenoi, Maria was an invaluable ally. As stated in the Alexiad, Isaac and Alexios left Constantinople in mid-February 1081 to raise an army against Botaneiates. However, when the time came, Anna quickly and surreptitiously mobilized the remainder of the family and took refuge in the Hagia Sophia. From there she negotiated with the emperor for the safety of family members left in the capital, while protesting her sons' innocence of hostile actions. Under the falsehood of making a vesperal visit to worship at the church, she deliberately excluded the grandson of Botaneiates and his loyal tutor, met with Alexios and Isaac, and fled for the forum of Constantine. The tutor discovered they were missing and eventually found them on the palace grounds, but Anna was able to convince him that they would return to the palace shortly. Then to gain entrance to both the outer and inner sanctuary of the church, the women pretended to the gatekeepers that they were pilgrims from Cappadocia who had spent all their funds and wanted to worship before starting their return trip. However, before they were to gain entry into the sanctuary, Straboromanos and royal guards caught up with them to summon them back to the palace. Anna then protested that the family was in fear for their lives, her sons were loyal subjects (Alexios and Isaac were discovered absent without leave), and had learned of a plot by enemies of the Komnenoi to have them both blinded and had, therefore, fled the capital so they may continue to be of loyal service to the emperor. She refused to go with them and demanded that they allow her to pray to the Mother of God for protection. This request was granted and Anna then manifested her true communicative and leadership capabilities: Nikephoros III Botaneiates was forced into a public vow that he would grant protection to the family. Straboromanos tried to give Anna his cross, but for her it was not large enough for all bystanders to witness the oath. She also demanded that the cross be personally sent by Botaneiates as a vow of his good faith. He obliged, sending a complete assurance for the family with his own cross. At the emperor's further insistence, and for their own protection, they took refuge at the convent of Petrion, where they were eventually joined by Maria of Bulgaria, mother of Irene Doukaina. Botaneiates allowed them to be treated as refugees rather than as guests. They were allowed to have family members bring in their own food and were on good terms with the guards from whom they learned the latest news. Anna was highly successful in three important aspects of the revolt: she bought time for her sons to steal imperial horses from the stables and escape the city; she distracted the emperor, giving her sons time to gather and arm their troops; and she gave a false sense of security to Botaneiates that there was no real treasonous plot against him. After bribing the Western troops guarding the city, Isaac and Alexios Komnenos entered the capital victoriously on 1 April 1081. During this time, Alexios was rumored to be the lover of Empress Maria, the daughter of King Bagrat IV of Georgia, who had been successively married to Michael VII Doukas and his successor Nikephoros III Botaneiates, and who was renowned for her beauty. Alexios arranged for Maria to stay on the palace grounds, and it was thought that he was considering marrying her. However, his mother consolidated the Doukas family connection by arranging the Emperor's marriage to Irene Doukaina, granddaughter of the Caesar John Doukas, the uncle of Michael VII, who would not have supported Alexios otherwise. As a measure intended to keep the support of the Doukai, Alexios restored Constantine Doukas, the young son of Michael VII and Maria, as co-emperor and a little later betrothed him to his own first-born daughter Anna, who moved into the Mangana Palace with her fiancé and his mother. This situation changed drastically, however, when Alexios' first son John II Komnenos was born in 1087: Anna's engagement to Constantine was dissolved, and she was moved to the main Palace to live with her mother and grandmother. Alexios became estranged from Maria, who was stripped of her imperial title and retired to a monastery, and Constantine Doukas was deprived of his status as co-emperor. Nevertheless, he remained on good terms with the imperial family and succumbed to his weak constitution soon afterwards. Wars against the Normans, Pechenegs, and Tzachas The thirty-seven year reign of Alexios was full of struggle. At the outset he faced the formidable attack of the Normans, led by Robert Guiscard and his son Bohemund, who took Dyrrhachium and Corfu and laid siege to Larissa in Thessaly (see Battle of Dyrrhachium). Alexios suffered several defeats before he was able to strike back with success. He enhanced his resistance by an agreement with the German king Henry IV, who, in exchange for 360,000 gold pieces, did attack the Normans in Italy, which forced the Normans to concentrate on their defenses at home in 1083–84. He also secured the alliance of Henry, Count of Monte Sant'Angelo, who controlled the Gargano Peninsula and dated his charters by Alexios' reign. Henry's allegiance would be the last example of Byzantine political control on peninsular Italy. The Norman military danger subsided with the death of Guiscard in 1085, and the Byzantines recovered most of their losses. Alexios next had to deal with disturbances in Thrace, where the heretical sects of the Bogomils and the Paulicians revolted and made common cause with the Pechenegs from beyond the Danube. Paulician soldiers in imperial service likewise deserted during Alexios' battles with the Normans. As soon as the Norman threat had passed, Alexios set out to punish the rebels and deserters, confiscating their lands. This led to a further revolt near Philippopolis, and the commander of the field army in the west, Gregory Pakourianos, was defeated and killed in the ensuing battle. In 1087 the Pechenegs raided into Thrace, and Alexios crossed into Moesia to retaliate but failed to take Dorostolon (Silistra). During his retreat, the emperor was confronted and defeated by the Pechenegs, who forced him to sign a truce and to pay protection money. In 1090 the Pechenegs invaded Thrace again, while Tzachas, the brother-in-law of the Sultan of Rum, launched a fleet and attempted to arrange a joint siege of Constantinople with the Pechenegs. Alexios overcame this crisis by entering into an alliance with a horde of 40,000 Cumans, with whose help he conquered the Pechenegs at Levounion in Thrace on 29 April 1091. This put an end to the Pecheneg threat, but in 1094 the Cumans began to raid the imperial territories in the Balkans. Led by a pretender claiming to be Constantine Diogenes, a long-dead son of the Emperor Romanos IV, the Cumans crossed the mountains and raided into eastern Thrace until their leader was eliminated at Adrianople. With the Balkans more or less pacified, Alexios could now turn his attention to Asia Minor, which had been almost completely overrun by the Seljuq Turks. Byzantine–Seljuq Wars and the First Crusade By the time Alexios ascended the throne, the Seljuqs had taken most of Asia Minor. Alexios was able to secure much of the coastal regions by sending peasant soldiers to raid the Seljuq camps, but these victories were unable to stop the Turks altogether. He also got military support from Western rulers like Robert I Count of Flanders (Robert the Frisian) returning from an armed pilgrimage to Jerusalem in 1086 spending time assisting the Byzantine Emperor against the Turks. In one battle Robert and three of his companions rode ahead of the main army charging the forces under the command of Kerbogha, whose forces were scattered completely. As early as 1090, Alexios had taken reconciliatory measures towards the Papacy, with the intention of seeking western support against the Seljuqs. In 1095 his ambassadors appeared before Pope Urban II at the Council of Piacenza. The help he sought from the West was some mercenary forces, not the immense hosts that arrived, to his consternation and embarrassment, after the pope preached the First Crusade at the Council of Clermont later that same year. This was the People's Crusade: a mob of mostly unarmed poor peasants and serfs, led by the preacher Peter the Hermit, fleeing from hunger in their home regions to a promised land of milk and honey. Not quite ready to supply this number of people as they traversed his territories, the emperor saw his Balkan possessions subjected to further pillage at the hands of his own allies. Eventually Alexios dealt with the People's Crusade by hustling them on to Asia Minor. There, they were massacred by the Turks of Kilij Arslan I at the Battle of Civetot in October 1096. The "Prince's Crusade", the second and much more formidable host of crusaders, gradually made its way to Constantinople, led in sections by Godfrey of Bouillon, Bohemond of Taranto, Raymond IV of Toulouse, and other important members of the western nobility. Alexios used the opportunity to meet the crusader leaders separately as they arrived, extracting from them oaths of homage and the promise to turn over conquered lands to the Byzantine Empire. Transferring each contingent into Asia, Alexios promised to supply them with provisions in return for their oaths of homage. The crusade was a notable success for Byzantium, as Alexios recovered a number of important cities and islands. The siege of Nicaea by the crusaders forced the city to surrender to the emperor in 1097, and the subsequent crusader victory at Dorylaion allowed the Byzantine forces to recover much of western Asia Minor. John Doukas re-established Byzantine rule in Chios, Rhodes, Smyrna, Ephesus, Sardis, and Philadelphia in 1097–1099. This success is ascribed by Alexios' daughter Anna to his policy and diplomacy, but by the Latin historians of the crusade to his treachery and deception. In 1099, a Byzantine fleet of ten ships was sent to assist the crusaders in capturing Laodicea and other coastal towns as far as Tripoli. The crusaders believed their oaths were made invalid when the Byzantine contingent under Tatikios failed to help them during the siege of Antioch; Bohemund, who had set himself up as Prince of Antioch, briefly went to war with Alexios in the Balkans, but he was blockaded by the Byzantine forces and agreed to become a vassal of Alexios by the Treaty of Deabolis in 1108. Around this time, in 1106, the twentieth year of his reign, Hesychius of Miletus records that the sky suddenly darkened and a "violent southern wind" blew the great statue of Constantine at the Strategion from its column, killing a number of men and women nearby. In 1116, though already terminally ill, Alexios conducted a series of defensive operations in Bithynia and Mysia to defend his Anatolian territories against the inroads of Malik Shah, the Seljuq Sultan of Iconium. In 1117 he moved onto the offensive and pushed his army deep into the Turkish-dominated Anatolian Plateau, where he defeated the Seljuq sultan at the Battle of Philomelion. Personal life During the last twenty years of his life Alexios lost much of his popularity. The years were marked by persecution of the followers of the Paulician and Bogomil heresies—one of his last acts was publicly to burn at the stake Basil, a Bogomil leader, with whom he had engaged in a theological dispute. In spite of the success of the First Crusade, Alexios also had to repel numerous attempts on his territory by the Seljuqs in 1110–1117. Alexios was for many years under the strong influence of an eminence grise, his mother Anna Dalassene, a wise and immensely able politician whom, in a uniquely irregular fashion, he had crowned as Augusta instead of the rightful claimant to the title, his wife Irene Doukaina. Anna Dalassene's ability to help him seize power and control the aristocracy, as well as her ability to understand and resolve dilemmas, assured Alexius that her mother was a capable counsel and managing partner by his side, and a sane and trusted regent in his absence. Alexios was never happier than when taking part in military exercises and he assumed personal command of his troops whenever possible. As such, Dalassene was the effective administrator of the Empire during Alexios' long absences in military campaigns: she was constantly at odds with her daughter-in-law and had assumed total responsibility for the upbringing and education of her granddaughter Anna Komnene. Succession Alexios' last years were also troubled by anxieties over the succession. Although he had crowned his son John II Komnenos co-emperor at the age of five in 1092, his wife Irene Doukaina wished to alter the succession in favor of their daughter Anna and Anna's husband, Nikephoros Bryennios the Younger. Bryennios had been made kaisar (Caesar) and received the newly created title of panhypersebastos ("honoured above all"), and remained loyal to both Alexios and John. Pretenders and rebels Apart from all of his external enemies, a host of rebels also sought to overthrow Alexios from the imperial throne, thereby posing another major threat to his reign. Due to the troubled times the empire was enduring, he had by far the greatest number of rebellions against him of all the Byzantine emperors. These included: Pre First Crusade Raictor, a Byzantine monk who claimed to be the emperor Michael VII. He presented himself to Robert Guiscard who used him as a pretext to launch his invasion of the Byzantine Empire. A conspiracy in 1084 involving several senators and officers of the army. This was uncovered before too many followers were enlisted. In order to conceal the importance of the conspiracy, Alexios merely banished the wealthiest plotters and confiscated their estates. Tzachas, a Seljuq Turkic emir who assumed the title of emperor in 1092. Constantine Humbertopoulos, who had assisted Alexios in gaining the throne in 1081 conspired against him in 1091 with an Armenian called Ariebes. John Komnenos, Alexios' nephew, governor of Dyrrachium, accused of a conspiracy by Theophylact of Bulgaria. Theodore Gabras, the quasi-independent governor of Trebizond and his son Gregory. Michael Taronites, the brother-in-law of Alexios. Nikephoros Diogenes, the son of emperor Romanos IV. Pseudo-Leo Diogenes , an impostor who assumed the identity of another of Romanos' sons, Leo Diogenes. Karykes, the leader of a revolt in Crete. Rhapsomates, who tried to create an independent kingdom in Cyprus. Post First Crusade Salomon, a senator of great wealth who in 1106 engaged in a plot with four brothers of the Anemas family. Gregory Taronites, another governor of Trebizond. The illegitimate descendant of a Bulgarian prince named Aron formed a plot in 1107 to murder Alexios as he was encamped near Thessalonica. The presence of the empress Irene and her attendants, however, made the execution of the plot difficult. In an attempt to have her return to Constantinople, the conspirators produced pamphlets that mocked and slandered the empress, and left them in her tent. A search for the author of the publications uncovered the whole plot, yet Aron was only banished due to his connection to the royal line of Bulgaria, whose blood also flowed in the veins of the empress Irene. Reform of the monetary system Under Alexios the debased solidus (tetarteron and histamenon) was discontinued and a gold coinage of higher fineness (generally .900–.950) was established in 1092, commonly called the hyperpyron at 4.45 grs. The hyperpyron was slightly smaller than the solidus. It was introduced along with the electrum aspron trachy worth a third of a hyperpyron and about 25% gold and 75% silver, the billon aspron trachy or stamenon, valued at 48 to the hyperpyron and with 7% silver wash and the copper tetarteron and noummion worth 18 and 36 to the billon aspron trachy. Alexios' reform of the Byzantine monetary system was an important basis for the financial recovery and therefore supported the so-called Komnenian restoration, as the new coinage restored financial confidence. Legacy Alexios I had overcome a dangerous crisis and stabilized the Byzantine Empire, inaugurating a century of imperial prosperity and success. He had also profoundly altered the nature of the Byzantine government. By seeking close alliances with powerful noble families, Alexios put an end to the tradition of imperial exclusivity and co-opted most of the nobility into his extended family and, through it, his government. Those who did not become part of this extended family were deprived of power and prestige. This measure, which was intended to diminish opposition, was paralleled by the introduction of new courtly dignities, like that of panhypersebastos given to Nikephoros Bryennios, or that of sebastokrator given to the emperor's brother Isaac Komnenos. Although this policy met with initial success, it gradually undermined the relative effectiveness of imperial bureaucracy by placing family connections over merit. Alexios' policy of integration of the nobility bore the fruit of continuity: every Byzantine emperor who reigned after Alexios I Komnenos was related to him by either descent or marriage. Family By his marriage with Irene Doukaina, Alexios I had the following children: Anna Komnene (1 December 1083 – 1148/55), in her infancy she was betrothed to Constantine Doukas, and with him treated as co-ruler by her father until after the birth of John II. In 1097 she married Nikephoros Bryennios the Younger, later raised to Caesar. Highly ambitious, after Alexios' death she tried unsuccessfully to usurp the throne. She then withdrew to a monastery, where she wrote her history of Alexios' reign. The couple had several children, but only four survived her. Maria Komnene (19 September 1085 – after 1136), initially betrothed to Gregory Gabras, but married to Nikephoros Katakalon. The couple had several children, but only two sons are known by name. John II Komnenos (13 September 1087 – 8 April 1143), who succeeded as emperor. Andronikos Komnenos (18 September 1091 – 1130/31), was named sebastokrator and participated in several campaigns until his death from disease. He married Irene, likely a Russian princess, and had at least two sons. Isaac Komnenos (16 January 1093 – after 1152), sebastokrator. Eudokia Komnene (14 January 1094 – ), who married the son of Constantine Iasites. Theodora Komnene (15 January 1096) who married (1) Constantine Kourtikes and (2) Constantine Angelos. By him she was the grandmother of Emperors Isaac II Angelos and Alexios III Angelos, as well as the progenitor of the ruling dynasty of the Despotate of Epirus. Through Isaac II's daughter Irene Angelina's children by Philip of Swabia, she is an ancestor of many European royal families, including all European monarchs currently reigning. Manuel Komnenos, born February 1097 and known only from a manuscript now in Moscow, died probably soon after his birth Zoe Komnene, born March 1098 and known only from a manuscript now in Moscow, died probably soon after her birth Later Russian sources also claim the existence of another daughter, Barbara, who supposedly married Grand Prince of Kiev Sviatopolk II Iziaslavich, but her existence is considered as a later invention by modern historians. See also Byzantine army (Komnenian era) List of Byzantine emperors Notes Sources Primary sources Secondary sources Further reading External links Alexius coinage 1050s births 1118 deaths Year of birth uncertain 11th-century Byzantine emperors 1080s in the Byzantine Empire 1090s in the Byzantine Empire 1100s in the Byzantine Empire 1110s in the Byzantine Empire 12th-century Byzantine emperors Byzantine people of the Byzantine–Norman wars Byzantine people of the Byzantine–Seljuk wars Byzantine people of the Crusades Christian anti-Gnosticism Domestics of the Schools Eastern Orthodox monarchs Nobilissimi Panhypersebastoi People associated with Xenophontos Monastery Byzantine people of the Byzantine–Pecheneg wars	5

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