Timothy Francis Leary (October 22, 1920 – May 31, 1996) was an American psychologist and writer known for his strong advocacy of psychedelic drugs.
He was a well-known figure of the counterculture of the 1960s.
Leary believed that LSD showed potential for therapeutic use in psychiatry.
He used it himself and developed a philosophy of mind expansion and personal truth through LSD.
He popularized catchphrases that promoted his philosophy, such as "turn on, tune in, drop out", "set and setting", and "think for yourself and question authority".
He also wrote and spoke frequently about transhumanist concepts of space migration, intelligence increase, and life extension.
Leary developed the eig...