"Turn on, tune in, drop out — the Harvard professor who became the most dangerous man in America, according to Richard Nixon."
Timothy Francis Leary was born on October 22, 1920, in Springfield, Massachusetts. His early life was turbulent — expelled from West Point, bounced through several universities before completing a PhD in psychology at Berkeley. By the late 1950s he was a respected Harvard researcher studying personality change and group dynamics, with a conventional academic career well underway.
Everything changed in 1960, when Leary ate psilocybin mushrooms in Cuernavaca, Mexico. He described the experience as the most profound of his life — more educational than his entire academic training. Back at Harvard, he launched the Harvard Psilocybin Project with colleague Richard Alpert (later Ram Dass), conducting research into the therapeutic and consciousness-expanding potential of psilocybin with prisoners, divinity students and creative professionals.
When LSD entered the picture — introduced to Leary by British philosopher Michael Hollingshead in 1962 — the research became increasingly difficult to contain within academic boundaries. In 1963 both Leary and Alpert were dismissed from Harvard — the first professors fired from Harvard in the 20th century. The dismissal transformed Leary from a researcher into a cause.
Through the mid-1960s Leary became the defining figure of psychedelic counter-culture — coining the phrase "Turn on, tune in, drop out", founding the League for Spiritual Discovery and positioning LSD as a sacrament for a new spiritual movement. President Nixon called him "the most dangerous man in America." He was arrested repeatedly on drug charges, escaped from prison in 1970 with the help of the Weather Underground and spent years in exile in Algeria and Switzerland before being recaptured in 1973.
After his release from prison in 1976, Leary reinvented himself repeatedly — as a stand-up comedian, a software designer, an early internet enthusiast and a champion of space migration and life extension. He died of prostate cancer on May 31, 1996, aged 75 — with characteristic theatricality, having documented his dying process on video and reportedly saying "Why not?" as his last words.
Leary informed on fellow activists to the FBI during his imprisonment in the 1970s — providing information that led to arrests and endangered people who had helped him. This is documented and was not disputed by Leary himself, who offered various justifications that his former allies largely rejected. It is the most serious stain on his legacy and cannot be explained away.
The recklessness of his public advocacy — urging mass LSD use without adequate preparation, context or caution — contributed to real harm. The psychedelic movement of the 1960s produced genuine casualties: people who had bad experiences without support, people who used psychedelics in dangerous contexts and people who were drawn into chaos rather than liberation. Leary's showmanship amplified this problem.
The clown persona that Leary cultivated — entertaining, witty, deliberately outrageous — made it easy to dismiss his genuine insights alongside the theatre. He was simultaneously a serious researcher and a performance artist, and the two roles worked against each other in ways that set back the legitimate scientific study of psychedelics by decades.
"Think for yourself and question authority."