A vintage 5 x 3 card signed in person by Timothy Leary (1920 - 1996), the American psychologist and author known for his strong advocacy of psychedelic drugs. Evaluations of Leary are polarized: according to poet Allen Ginsberg, he was "a hero of American consciousness", while President Richard Nixon disagreed, calling Leary "the most dangerous man in America". During the 1960s and 1970s, at the height of the counterculture movement, Leary was arrested 36 times. As a clinical psychologist at Harvard University, Leary founded the Harvard Psilocybin Project after a revealing experience with magic mushrooms he had in Mexico in 1960. For two years, he tested psilocybin's therapeutic effects, in the Concord Prison Experiment and the Marsh Chapel Experiment. He also experimented with lysergic acid diethylamide (LSD), which was also legal in the U.S. at the time. Harvard fired Leary, but he continued to publicly promote psychedelic drugs and became a well-known figure of the counterculture of the 1960s; he popularized catchphrases that promoted his philosophy, such as "turn on, tune in, drop out" and "think for yourself and question authority".