Discordianism is a religion and subsequent philosophy based on the veneration or worship of Eris, a.k.a. Discordia, the Goddess of chaos, or archetypes or ideals associated with her. It was founded after the 1963 publication of its holy book, the Principia Discordia, written by Greg Hill with Kerry Wendell Thornley, the two working under the pseudonyms Malaclypse the Younger and Omar Khayyam Ravenhurst.