Fraser Clark (died 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.
In 1989, he and Marcus Pennell organised the first Zippie Picnic on Hampstead Heath in London.
Clark staged many pranks, particularly against the government of Margaret Thatcher and then John Major.
Clark also engaged American youth culture on topics related to the Pronoia tour.