Ignatius Donnelly

(1831-1901)

Ignatius Loyola Donnelly (November 3, 1831 – January 1, 1901) was a U.S. Congressman, populist writer and amateur scientist, known primarily now for his theories concerning Atlantis, Catastrophism (especially the idea of an ancient impact event affecting ancient civilizations), and Shakespearean authorship, all of which modern historians consider to be pseudoscience and pseudohistory.