Spiritual Discovery. In late 1966 and early 1967, Leary toured college campuses presenting a multimedia performance called "The Death of the Mind", attempting an artistic replication of the LSD experience. He said that the League for Spiritual Discovery was limited to 360 members and was already at its membership limit, but encouraged others to form their own psychedelic religions. He published a pamphlet in 1967 called Start Your Own Religion to encourage people to do so. Leary was invited to attend the January 14, 1967 Human Be-In by Michael Bowen, the primary organizer of the event, a gathering of 30,000 hippies in San Francisco's Golden Gate Park. In speaking to the group, Leary coined the famous phrase "Turn on, tune in, drop out". In a 1988 interview with Neil Strauss, he said the slogan was "given to him" by Marshall McLuhan when the two had lunch in New York City, adding, "Marshall was very much interested in ideas and marketing, and he started singing something like, 'Psychedelics hit the spot / Five hundred micrograms, that's a lot,' to the tune of [the well-known Pepsi 1950s singing commercial]. Then he started going, 'Tune in, turn on, and drop out.'" Though the more popular "turn on, tune in, drop out" became synonymous with Leary, his actual definition with the League for Spiritual Discovery was: "Drop Out—detach yourself from the external social drama which is as dehydrated and ersatz as TV. Turn On—find a sacrament which returns you to the temple of God, your own body. Go out of your mind. Get high. Tune In—be reborn. Drop back in to express it. Start a new sequence of behavior that reflects your vision." Repeated FBI raids ended the Millbrook era. Leary told author and Prankster Paul Krassner of a 1966 raid by Liddy, "He was a government agent entering our bedroom at midnight. We had every right to shoot him. But I've never owned a weapon in my life. I have never had and never will have a gun around." In November 1967, Leary engaged in a televised debate on drug use with MIT professor Jerry Lettvin. Post-Millbrook At the end of 1967, Leary moved to Laguna Beach, California, and made many friends in Hollywood. "When he married his third wife, Rosemary Woodruff, in 1967, the event was directed by Ted Markland of Bonanza. All the guests were on acid." In the late 1960s