At the end of his third year, in 1969, he dropped out of college and moved to Laguna Beach which was then home base for Timothy Leary and the Brotherhood of Eternal Love.

In January 1970, Eisner returned to Los Angeles where he became a freelance journalist writing feature articles on topics focusing on LSD and the psychedelic consciousness movement for the underground press.

In 1976, he became a contributing editor for High Times magazine and wrote a series of articles including "LSD Purity" and "Who Turned on Whom" with Peter Stafford.

That group known as Linkage brought Albert Hofmann to UC Santa Cruz in 1977 for his first public lecture in the US at a conference called "LSD: A Generation Later."

The conference was attended by both counterculture figures such as Timothy Leary, Allen Ginsberg, Ram Dass, Stephen Gaskin, and Ralph Metzner, as well as early psychedelic researchers including Oscar Janiger, William McGlothlin, Stanley Krippner, Claudio Naranjo and Willis Harman.

The Island Group conceived and co-organized the 1992 "The Bridge: Linking the Past, Present and Future of Psychedelics" a two-day conference held at Stanford University.