The Foundation Series

Information about The Foundation Series

Enlarge picture
Second Foundation (1953), 1973 Panther paperback edition with cover art by Chris Foss. 187 pages
The Foundation Series is an epic science fiction series written over a span of forty-four years by Isaac Asimov. It consists of seven volumes that are closely linked to each other, although they can be read separately. The term 'Foundation Series' is often used more generally to include the Robot Series and Empire Series, which are set in the same fictional universe. In total there are fourteen novels and dozens of short stories written by Asimov, and six novels written by other authors after his death. The series is highly acclaimed, winning the one-time Hugo Award for "Best All-Time Series" in 1965.

Overview

Foundation was originally a series of eight short stories published in Astounding Magazine between May 1942 and January 1950. According to Asimov the premise was based on ideas set forth in Edward Gibbon's History of the Decline and Fall of the Roman Empire and was invented spontaneously on his way to meet with editor John W. Campbell, with whom he developed the concept.[1]

The first four stories were collected, along with a new story taking place before the others, in a single volume published by Gnome Press in 1951 as Foundation. The remainder of the stories were published in pairs as Foundation and Empire (1952) and Second Foundation (1953), resulting in the "Foundation Trilogy", as the series was known for decades. In 1981, after the series had long been considered the most important work of modern science fiction, Asimov was convinced by his publishers to write a fourth book, which was Foundation's Edge (1982).[2] He followed this with a sequel, Foundation and Earth (1983) and five years later prequels Prelude to Foundation and Forward the Foundation. During the lapse between sequels and prequels Asimov tied in his Foundation series with his various other series, creating a single unified universe of his most known works.

The premise of the series is that scientist Hari Seldon spent his life developing a branch of mathematics known as psychohistory, a concept devised by Asimov and Campbell. Using the law of mass action, it can predict the future, but only on a large scale; it is error-prone for anything smaller than a planet or an empire. Using these techniques, Seldon foresees the fall of the Galactic Empire, which encompasses the entire Milky Way, and a dark age lasting thirty thousand years before a second great empire arises. To shorten the period of barbarism, he creates two Foundations, small secluded havens of art and science, on opposite ends of the galaxy. The focus of the trilogy is on the Foundation of the planet Terminus. The people living there are working on an all-encompassing Encyclopedia, and are unaware of Seldon's real intentions (for if they were, the variables would become too uncontrolled). The Encyclopedia serves to preserve knowledge of the physical sciences after the collapse. The Foundation's location is chosen so that it acts as the focal point for the next empire in another thousand years (rather than the projected thirty thousand).

The trilogy

Enlarge picture
Hari Seldon was the founder of the First and Second Foundations and inventor of Psychohistory (cover art for Foundation, by Stephen Youll)


The early stories are derived from Edward Gibbon's The History of the Decline and Fall of the Roman Empire (Asimov said he did "a little bit of cribbin' from the works of Edward Gibbon" when describing the influence of that work on the Trilogy).

In many ways, the Foundation series is unique as a science fiction novel. The focus of the books is certainly the trends through which a civilization might progress, specifically seeking to analyze how they might progress over time using history as a precedent. Although many science fiction novels such as Nineteen Eighty-Four or Fahrenheit 451 do this, they typically do so by how current trends in society might come to fruition, and act as a moral allegory on the modern world. The Foundation series, on the other hand, typically looks at the trends in a wider scope, not necessarily looking at what the societies change into, but how they change and adapt. Furthermore, the concept of psychohistory, which gives the events in the story a sense of rational fatalism, leaves little room for moralization, as events are often treated as inevitable and necessary rather than deviations from the greater good. For example, the Foundation slides gradually into oligarchy and dictatorship prior to the appearance of the galactic conqueror, known as the Mule who was able to succeed through an empathic/telepathic ability, but, for the most part, the book treats that change as being necessary in Hari Seldon's plan, rather than mulling over whether it is on the whole positive or negative.

The book also wrestles with the idea of individualism. Hari Seldon's plan is often treated as an inevitable mechanism of society, a vast mindless mob mentality of quadrillions of humans across the galaxy, and many in the series struggle against it only to fail. However, the plan itself is reliant upon cunning individuals like Salvor Hardin and Hober Mallow to make wise decisions, and capitalize on the trends. The Mule, a single individual with remarkable powers, topples the Foundation and nearly destroys the Seldon plan with his special, unforeseen abilities. In order to repair the damage the Mule inflicts, the Second Foundation deploys a plan which also turns upon individual reactions. Hari Seldon himself hopes that his Plan will "reduce 30,000 years of Dark Ages and barbarism to a single millennium." Psychohistory is based on group trends, and cannot predict with sufficient accuracy the effects of these individuals, and the Second Foundation's true purpose was to counter this flaw.

Sequels

Asimov unsuccessfully tried to end the series at the end of Second Foundation. But, because of the predicted thousand years until the rise of the next Empire (of which only a few hundred had elapsed), the series lacked a sense of closure. For decades, fans pressured him to write a sequel.



In 1982, following a thirty-year hiatus, Asimov gave in and wrote what was at the time a fourth volume: Foundation's Edge. This was followed shortly thereafter by Foundation and Earth. Foundation and Earth (which takes place some 500 years after Seldon) ties up all the loose ends, but opens a brand new line of thought in the last dozen pages. As a result, some fans (wanting a tidy end to the series) consider this finale to be a failure. According to his widow Janet Asimov (in her biography of him, It's Been a Good Life), he had no idea how to continue after Foundation and Earth, so he started writing the prequels.

Merging with other series

The series is set in the same universe as Asimov's first published novel, Pebble in the Sky, although Foundation takes place approximately ten thousand years later. Pebble in the Sky became the basis for the Empire Series. Then, at some unknown date (prior to writing Foundation's Edge) Asimov decided to merge the Foundation/Empire series with his Robot series. Thus, all three series are set in the same universe, giving them a combined length of 15 novels and a total of about 1,500,000 words. The merge also created a time span of the series of approximately 20,000 years.

Timeline inconsistencies

Early on during Asimov's original world-building of the Foundation universe, he established within the first published stories a chronology placing the tales approximately some 50,000 years into the future from the time they were written (circa 1940 AD). This precept was maintained in the pages of his later novel Pebble in the Sky, wherein Imperial archaeologist Bel Arvardan refers to ancient human strata discovered in the Sirius sector dating back "some 50,000 years." However, when Asimov decided decades later to retroactively integrate the universe of his Foundation and Galactic Empire novels with that of his Robot stories, a number of changes and minor discrepancies surfaced — the character R. Daneel Olivaw was established as having existed for some 20,000 years, with the original Robot novels featuring the character occurring not more than a couple of millennia after the early-21st Century Susan Calvin short stories. Also, in Foundation's Edge, mankind was referred to as having possessed interstellar space travel for only 22,000 years, a far cry from the fifty millennia of earlier works.

In the spring of 1955, Asimov published an early timeline in the pages of Thrilling Wonder Stories magazine based upon his thought processes concerning the Foundation universe's history at that point in his life, which vastly differs from its modern-era counterpart in terms of stories included — many would later be jettisoned from the late-period chronology, or would experience temporal relocation by the author — and in terms of the aforementioned lengthier scope of time. (For example, in the original 1950s timeline, humanity does not discover the hyperspatial drive until approximately the year AD 5000, whereas in the reincorporated Robot universe chronology, the first interstellar jump occurs in 2029 AD, during the events of I, Robot.)[1]

Ultimately, the revised, retconned historical timeline implemented by Asimov during the 1980s is considered to be the canonical one, with the previous references serving as quaint anachronistic gaffes by the characters (perhaps due to in-universe reasons, such as the inevitable distortion of accurate historical recordkeeping over the gulf of tens of thousands of years).

Prequels

Enlarge picture
Forward the Foundation, the last novel Asimov wrote, continues the story of Hari Seldon and his family
The prequels, written last in the series but chronologically first, tell the life story of Hari Seldon and (simultaneously) the development of Psychohistory. The first prequel, Prelude to Foundation, starts with a young Hari Seldon presenting a paper outlining the possibility of psychohistory, and ends about a year later. The second novel, Forward the Foundation, takes place at intervals starting about ten years after Prelude to Foundation. It tells how psychohistory becomes functional, all while Hari loses loved ones and the Galactic Empire continues to break apart. Forward the Foundation ends just as Hari finishes recording the messages to be played throughout the original trilogy. Forward the Foundation was the last Foundation novel Asimov completed before his death.

Other authors

Asimov's novels covered only 500 of the expected 1,000 years it would take for the Foundation to become a galactic empire. After his death, the Asimov estate at the request of Janet Asimov approached Gregory Benford and asked him to write another Foundation story. He agreed, and at that same time suggested that it should form part of a trilogy with Greg Bear and David Brin writing the other two books, which they agreed to do. Foundation's Fear takes place chronologically between Asimov's two prequel novels; Foundation and Chaos is set at the same time as the first chapter of Foundation, filling in background; Foundation's Triumph covers ground following the recording of the holographic messages to the Foundation, and ties together a number of loose ends. These three books are now known collectively as the Second Foundation Trilogy. Many fans, eager for the second trilogy to fill in the gap, were disappointed.

Also, shortly before his death in 1992, Asimov approved an outline for three novels, known as the Caliban Trilogy by Roger MacBride Allen, set between Robots and Empire and the Empire Series. The Caliban Trilogy describes the terraforming of the Spacer world Inferno, a planet where an ecological crisis forces the Spacers to abandon many long-cherished parts of their culture. Allen's novels echo the uncertainties that Asimov's later books express about the Three Laws of Robotics, and in particular the way that a thoroughly roboticized culture can degrade human initiative.

Enlarge picture
Science Fiction authors such as Orson Scott Card paid tribute to the Foundation series in the collection of short stories Foundation's Friends


The Foundation universe was once again revisited in Foundation's Friends, a collection of short stories written by many prominent science fiction authors of today. Orson Scott Card's "The Originist" clarifies the founding of the Second Foundation shortly after Seldon's death; Harry Turtledove's "Trantor Falls" tells of the efforts by the Second Foundation to survive during the sacking of Trantor; and George Zebrowski's "Foundation's Conscience" is about the efforts of a historian to document Seldon's work following the rise of the second Galactic empire.

Most recently, the Asimov Estate authorized publication of another trilogy of robot mysteries by Mark W. Tiedemann. These novels, which take place several years before Asimov's Robots and Empire, are Mirage (2000), Chimera (2001) and Aurora (2002). These were followed by yet another robot mystery, Alexander C. Irvine's Have Robot, Will Travel (2004), set five years after the Tiedemann trilogy.

There are novels by various authors (Asimov's Robot City series, Isaac Asimov's Robots and Aliens series, and Isaac Asimov's Robots in Time series) loosely connected to the Robot Series, but they contain many inconsistencies with Asimov's books, and are not generally considered part of the Foundation Series.

Cultural impact

An eight-part radio adaptation of the original trilogy, with sound design by the BBC Radiophonic Workshop, was broadcast on BBC Radio 3 in 1973 — one of the first BBC radio drama serials to be made in stereo. A BBC 7 rerun commenced in July 2003.

In 1965, the Foundation Trilogy beat several other science fiction and fantasy series (including The Lord of the Rings by J. R. R. Tolkien) to receive a special Hugo Award for "Best All-Time Series." It is still the only series so honored. Asimov himself wrote that he assumed the one-time award had been created in order to honor The Lord of the Rings, and he was amazed when his work won.

Satirical parodies, such as Douglas Adams' The Hitchhiker's Guide to the Galaxy and Harry Harrison's Bill, the Galactic Hero, often display clear Foundation influences. For instance The Guide of the former is clear spoof of the Encyclopedia Galactica, while the latter also features the ultra-urbanized Imperial planet Helior, often parodying the logistics such a planet-city would require, but that Asimov's novel downplays.

In the Star Wars universe, Coruscant — the urban-covered Imperial capital world — is a direct borrowing of Asimov's Trantor. (Visually, they are not exactly similar: Trantor is covered in domed cities, while Coruscant's buildings are open to the air.)

In 1995, Donald Kingsbury wrote "Historical Crisis", which he later expanded into a novel, Psychohistorical Crisis. It is not set in the same fictional universe as the Foundation series, but the universe described in it is very much similar to that of the Foundation series, being a clear and conscious borrowing. The novel explores the ideas of psycho-history into a number of new directions, inspired by more recent developments in mathematics and computer science, as well as by new ideas in science fiction itself.

The oboe-like holophonor in Matt Groening's animated television series Futurama is based directly upon the "Visi-Sonor" which Magnifico plays in Foundation and Empire. (See the DVD commentary for the series' final episode, "The Devil's Hands are Idle Playthings".) The "Visi-Sonor" is also mirrored in an episode of Special Unit 2 where a child's television character plays an instrument that induces mind control over children.

There is a quick lyrical reference to "The Foundation Series" in the song "And You and I" by English Progressive rock band Yes. The lyric reads, "As the Foundation left to create the spiral aim."

In Neverwhere, the Marquis de Carabas repeats Salvor Hardin's maxim that "violence is the last refuge of the incompetent."

Deep Purple's 1971 song "The Mule" (from the "'Fireball" album), with its lyrics about being "just another slave for the Mule", seems inspired by the telepathic enslaver character The Mule, from "Foundation and Empire".

William Shatner in the Preserver Series of Novels (Co-written with Judy and Garfield Reeves-Stevens) Also mentions Psycohistory as a mean of predicting the future andthere is mention of Asimov

The sun and spaceship emblem of the galactic empire has seen many variations in science fiction.

List of books

Prelude to Foundation contains Asimov's suggested reading order/chronology for his science fiction books in the introduction. [2] This recommended reading order for the books is listed below. However, many critics argue that the books should be read in publication order. Specifically, the argument is made that reading the Foundation prequels prior to reading the Foundation Trilogy fundamentally alters the original narrative structure of the Trilogy by spoiling plot surprises.

Robot short stories

The Robot novels

The Caliban trilogy

The Galactic Empire series

The Foundation novels

The Foundation Trilogy

The Second Foundation Trilogy

Asimov's final chronological Foundation books

Note that this list corrects several mistakes found in the list in Asimov's Prelude to Foundation. It also adds six novels that were published after Asimov's death in 1992, and another which was entering publication at the time of his death.

Tangential books

While not mentioned in the above list, some consider the books The End of Eternity (1955) and Nemesis (1989) part of the series.

The End of Eternity is vaguely referenced in Foundation's Edge, where a character mentions the Eternals, whose "task it was to choose a reality that would be most suitable to Humanity". (The End of Eternity also refers to a "Foundation" within its story.) In Forward the Foundation Hari Seldon refers to a twenty-thousand-year-old story of "a young woman that could communicate with an entire planet that circled a sun named Nemesis," an obvious reference to Nemesis. In Foundation and Earth there is also a reference to a tale about a sun that approached the Earth, possibly referring to Nemesis as well. In Nemesis, the main colony is one of the Fifty Settlements, a collection of orbital colonies that form a state. It is possible that the Fifty Settlements were the basis for the fifty Spacer worlds in the Robot stories. The implication at the end of Nemesis that the inhabitants of the off-Earth colonies are splitting off from Earthbound humans could also be connected to a similar implication about the Spacers in Mark W. Tiedemann's Robot books.

On the other hand, these references might be just jokes by Asimov, and the stories mentioned could be just those really written by himself (as seen in The Robots of Dawn where Fastolfe makes a reference to Asimov's Liar!). Furthermore, Asimov himself did not mention The End of Eternity in the series listing from Prelude to Foundation. As for Nemesis, it was written after Prelude to Foundation, but in the author's note Asimov explicitly states that the book is not part of the Foundation series, but that some day he might tie it to the others.

Nemesis also touches on a pair of short stories published in Asimov's collection, Gold, dealing with the Fifty Settlements.

Major characters

  • Hari Seldon, leader of the Psychohistorical movement which creates the Foundation and the Seldon Plan; first First Speaker of the Second Foundation (traditional)
  • R. Giskard Reventlov, the first robot able to alter human minds (of the 'diaspora' era, see I, Robot story "Liar, Liar")
  • R. Daneel Olivaw, also Chetter Hummin, First Minister Eto Demerzel, the first Humaniform robot who organizes the creation of both the Seldon Plan and Gaia and Galaxia
  • The Mule, (originally from Gaia), a mutant who was extremely adept at altering human minds
  • Dors Venabili, Seldon's wife and protector, known as the "Tiger Woman" for her physical prowess and swiftness to action
  • Yugo Amaryl, Seldon's colleague, a heatsinker from the Dahl Sector of Trantor
  • Emperor Cleon I, Entun Dynasty, Emperor during the first part of Hari Seldon's stay on Trantor
  • Salvor Hardin, First Mayor of Terminus, first Foundationer to realize the 'farce' of the Encyclopedia Galactica
  • Gaal Dornick, One of the last Psychohistorians to join the Project
  • Hober Mallow, a "Trader Prince" during the Foundation's 'Trader' days
  • Bel Riose, General of the Galactic Empire
  • Golan Trevize, Councilman of Terminus who discovers the secret location of Earth
  • Janov Pelorat, Historian, Accompanies Trevize
  • Arkady Darell, daughter of Bayta Darrell who theorizes a location of the Second Foundation
  • Blissenobiarella (Bliss), a human element of the superorganism Gaia
  • Bayta Darrell, grandmother of Arkady Darell; Bayta was instrumental in the defeat of the Mule
  • Raych Seldon, Hari Seldon's adopted son from the Dahl Sector of Trantor
  • Wanda Seldon, Raych Seldon's eldest daughter daughter who later becomes a Psychohistorian and second First Speaker of the Second Foundation
  • Preem Palver, a very successful First Speaker of the Second Foundation
  • Ebling Mis, Thought to be first person to discover the location of the Second Foundation.

References

1. ^ Asimov, Isaac. La edad de oro II. Plaza & Janes. 1987. P 252-253 (Spanish language translation of The Early Asimov) See afterword for the "Legal Rites" story.
2. ^ ISAAC ASIMOV. Foundation and Earth. Halmstad: Spectra. ISBN 0-553-58757-9. 

See also

External links

Preceded by: Series:
Galactic Empire SeriesFoundation Universe
worldwide view of the subject.
Please [ improve this article] or discuss the issue on the talk page.


Science fiction (abbreviated SF or sci-fi
..... Click the link for more information.
Isaac Asimov

A photograph of Asimov taken by Jay Kay Klein
Pseudonym: Dr. A, Paul French, George E. Dale
Born: January 2?, 1920?[1]
Petrovichi, Russian SFSR
Died: March 6 1992 (aged 72)
New York, New York, USA
..... Click the link for more information.
Isaac Asimov's Robot Series is a series of books by Isaac Asimov, both collections of short stories and novels. This series and the ideas set forth in them defined the Robot's place in modern science fiction, the stereotype he created appearing everywhere from
..... Click the link for more information.
The Galactic Empire Series contains Isaac Asimov's three earliest novels and one short story. In order of internal chronology they are:
  • The Stars, Like Dust (1951)
  • The Currents of Space (1952)
  • Pebble in the Sky (1950), his first novel

..... Click the link for more information.
Analog Science Fiction and Fact is the longest-running science fiction magazine of all time. Initially published in 1930 in the United States as Astounding Stories, it is considered one of the seminal science-fiction magazines.
..... Click the link for more information.
Edward Gibbon (April 27, 1737[1] – January 16, 1794) was an English historian and Member of Parliament. His most important work, The History of the Decline and Fall of the Roman Empire, was published in six volumes between 1776 and 1788.
..... Click the link for more information.
The History of The Decline and Fall of the Roman Empire, a major literary achievement of the 18th century published in six volumes, was written by the celebrated English historian Edward Gibbon.
..... Click the link for more information.
John W. Campbell

The cover of The John W. Campbell Letters, volume 1, with a picture of Campbell by Frank Kelly Freas
Pseudonym: Don A. Stuart
Born: 8 June 1910
Newark, New Jersey, United States
Died: 11 July 1971 (aged 61)
..... Click the link for more information.
Hari Seldon is the intellectual hero of Isaac Asimov's Foundation Series. In his capacity as mathematics professor at Streeling University on Trantor, he developed psychohistory, allowing him to predict the future in probabilistic terms.
..... Click the link for more information.
Mathematics (colloquially, maths or math) is the body of knowledge centered on such concepts as quantity, structure, space, and change, and also the academic discipline that studies them. Benjamin Peirce called it "the science that draws necessary conclusions".
..... Click the link for more information.
Psychohistory is the name of a fictional science, which combined history, sociology, and mathematical statistics, in Isaac Asimov's Foundation universe, to create a (nearly) exact science of the actions of very large groups of people, such as the Galactic Empire.
..... Click the link for more information.
Mass action in sociology refers to the situations where large number of people behave simultaneously in similar way but individually and without coordination.

For example, at any given moment, many thousands of people are shopping - without any coordination between
..... Click the link for more information.
Galactic Empire is an empire consisting of planets settled by humans across the whole galaxy. Unlike galactic empires in more recent science fiction, Asimov's Galactic Empire appears to be a benign or mostly benign institution.
..... Click the link for more information.
Milky Way (a translation of the Latin Via Lactea, in turn derived from the Greek Γαλαξίας (Galaxias) sometimes referred to simply as "the Galaxy"), is a barred spiral galaxy that lies with the Local Group of galaxies
..... Click the link for more information.
Dark Ages or Dark Age refers to the Early Middle Ages, the period encompassing (roughly) 476 AD to 1000 AD.

This concept of a dark age was created by the Italian scholar Petrarch (Francesco Petrarca) in the 1330s, and was originally intended as a sweeping criticism of
..... Click the link for more information.
Terminus

Statistics
Universe The Foundation Series

Notable locations Terminus City, City Hall, Time Vault

Notable races Humans
Notable people Salvor Hardin
Creator Isaac Asimov
..... Click the link for more information.
Edward Gibbon (April 27, 1737[1] – January 16, 1794) was an English historian and Member of Parliament. His most important work, The History of the Decline and Fall of the Roman Empire, was published in six volumes between 1776 and 1788.
..... Click the link for more information.
The History of The Decline and Fall of the Roman Empire, a major literary achievement of the 18th century published in six volumes, was written by the celebrated English historian Edward Gibbon.
..... Click the link for more information.
Nineteen Eighty-Four (1984)

British first edition cover
Author George Orwell
Country England
Language English
Genre(s) Dystopian, Political Novel
Publisher Secker and Warburg (London)
..... Click the link for more information.
Fahrenheit 451

First edition cover
Author Ray Bradbury
Illustrator Joe Mugnani
Country United States
Language English
Genre(s) Dystopian novel
Publisher Ballantine Books
Publication date 1953
..... Click the link for more information.
The Mule is a fictional character from Isaac Asimov's Foundation Series. One of the greatest conquerors the galaxy has ever seen, he is a mentalic who has the ability to manipulate human emotions.
..... Click the link for more information.
The Seldon Plan is the central theme of Isaac Asimov's Foundation Series of stories and novels.

Psychohistory

Hari Seldon devised the Seldon Plan using an analytical technique he had mastered called psychohistory.
..... Click the link for more information.
Salvor Hardin is a mayor of Terminus, the location of the Foundation created by Hari Seldon in Isaac Asimov's fictional Foundation series.

Hardin is portrayed as a shrewd and ruthless politician, a master manipulator who nevertheless acts in the interests of the lofty
..... Click the link for more information.
Hober Mallow is a fictional character in Isaac Asimov's The Foundation Series of stories and novels. He is the central protagonist of "The Merchant Princes," the final short story composing Asimov's Foundation.
..... Click the link for more information.
Second Foundation

Dust-jacket from the first edition
Author Isaac Asimov
Cover artist Ric Binkley
Country United States
Language English
Series Foundation Series
Genre(s) Science fiction novel
..... Click the link for more information.
Second Foundation

Dust-jacket from the first edition
Author Isaac Asimov
Cover artist Ric Binkley
Country United States
Language English
Series Foundation Series
Genre(s) Science fiction novel
..... Click the link for more information.
19th century - 20th century - 21st century
1950s  1960s  1970s  - 1980s -  1990s  2000s  2010s
1979 1980 1981 - 1982 - 1983 1984 1985

Year 1982 (MCMLXXXII
..... Click the link for more information.
Foundation's Edge

Cover of first edition (hardcover)
Author Isaac Asimov
Country United States
Language English
Series Foundation Series
Genre(s) Science fiction novel
Publisher Doubleday
..... Click the link for more information.
Foundation and Earth

Cover of Del Rey paperback edition
Author Isaac Asimov
Cover artist Michael Whelen
Country United States
Language English
Series Foundation series
Genre(s) Science fiction novel
..... Click the link for more information.
Janet Asimov (maiden name Janet Opal Jeppson) (born August 6, 1926 in Ashland, Pennsylvania) is an American science fiction author and psychoanalyst.

Janet Asimov started writing children's science fiction under the name J O Jeppson in the 1970s.
..... Click the link for more information.

This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.