Atlantis: The Antediluvian World is a pseudoarchaeological 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 suggested that all known ancient civilizations were descended from this lost land. Content 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 writing, 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. Author's stated intentions Donnelly discusses many aspects of his proposed theory in extreme detail. He includes many illustrations as well as charts with lingual similarities. With his book he states that he is trying to prove thirteen distinct hypotheses: There once existed in the Atlantic Ocean, opposite the Mediterranean Sea, a large island, which was the remnant of an Atlantic continent, and known to the ancients as Atlantis. That the description of this island given by Plato is not fable, as has been long supposed, but veritable history. That Atlantis was the region where man first rose from a state of barbarism to civilization. That it became, in the course of ages, a populous and mighty nation, from whose emigrants the shores of the Gulf of Mexico, the Mississippi River, the Amazon River, the Pacific coast of South America, the Mediterranean, the west coast of Europe and Africa, the Baltic, the Black Sea, and the Caspian were populated by civilized nations. That it was the true Antediluvian world: the Garden of Eden; the Gardens of Hesperides; the Elysian Fields; the Gardens of Alcinous; the Mesomphalos, the Olympos; the Asgard of the traditions of the ancient nations. That it represented a universal memory of a great land, where early mankind dwelt for ages in peace and happiness. That the gods and goddesses of the ancient Greeks, the Phoenicians, the Hindus, and the Scandinavians were simply the kings, queens, and heroes of Atlantis; and the acts attributed to them in mythology are