Timothy Leary

Timothy Leary was an American psychologist and author best known for advocating psychedelic drugs. As a clinical psychologist at Harvard, he founded the Harvard Psilocybin Project, and the university fired him in 1963. His books include The Psychedelic Experience, written with Richard Alpert and Ralph Metzner, and Exo-Psychology, published in 1977, which sets out his eight-circuit model of consciousness. Leary also wrote essays and memoirs such as Flashbacks and Changing My Mind, Among Others.