Atlantis: The Antediluvian World is a book published in 1882 by Minnesota populist politician Ignatius L. Donnelly, who was born in Philadelphia, Pennsylvania in 1831. Donnelly considered Plato's account of Atlantis as largely factual and attempted to establish that all known ancient civilizations were descended from this lost land. Many of its theories are the source of many modern-day concepts about Atlantis, including these: the civilization and technology beyond its time, the origins of all present races and civilizations, and a civil war between good and evil. Much of Donnelly's scholarship, especially with regard to Atlantis as an explanation for similarities between ancient civilizations of the Old and New Worlds, was inspired by the publications of Charles Étienne Brasseur de Bourbourg and the fieldwork of Augustus Le Plongeon in the Yucatan. It was avidly supported by publications of Helena Blavatsky and the Theosophical Society as well as by Rudolf Steiner. Donnelly's work on Atlantis inspired books by James Churchward on the lost continent of Mu, also known as Lemuria. More recently, his theories have influenced the visions of Edgar Cayce, creation of the superhero Namor the Sub-Mariner, [citation needed] the 1969 pop song "Atlantis" by Donovan, the 2001 film Atlantis: The Lost Empire and the plot of the 2009 film 2012 by Roland Emmerich.[citation needed] Graham Hancock's Fingerprints of the Gods proposes, like Donnelly, that civilizations in Egypt and the Americas had a common origin in a civilization lost to history, although in Hancock's book the civilization was not located in the northern Atlantic....................... Ignatius Loyola Donnelly (November 3, 1831 - January 1, 1901) was a U.S. Congressman, populist writer, and amateur scientist. He is known primarily now for his theories concerning Atlantis, Catastrophism (especially the idea of an ancient impact event affecting ancient civilizations), and Shakespearean authorship, which many modern historians consider to be pseudoscience and pseudohistory. Donnelly's work corresponds to the writings of late 19th and early 20th century figures such as Helena Blavatsky, Rudolf Steiner, and James Churchward. Life and career: Donnelly was the son of Philip Carrol Donnelly, an Irish Catholic immigrant who had settled in Philadelphia, Pennsylvania. His sister was the writer Eleanor C. Donnelly. On June 29, 1826, Philip had married Catherine Gavin, a second generation American of Irish ancestry. Af