Fraser Clark (d. 21 January 2009), was one of the leaders of the global technogaian movement. As founder and editor of Encyclopaedia Psychedelica, he outlined his views on entheogens and nature, and was a key advocate of the outdoor rave movement, hosting regular, small, indoor festivals such as those held at his central London club, Megatripolis. Clark staged many pranks, particularly against the government of Margaret Thatcher and then John Major. He opposed the Poll Tax and later Criminal Justice Bill. Clark also engaged American youth culture on topics related to the Pronoia tour.