Probably the first and most important modern book on the myth of Atlantis as first expounded by Plato.
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 the theories from this book 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, the 1969 pop song “Atlantis” by Donovan, the 2001 film Atlantis: The Lost Empire, writer Graham Hancock, and the plot of the 2009 film 2012 by Roland Emmerich.
– from wikipedia.