Psychotherapist, writer and researcher who has been involved in the study of transformations of consciousness since graduate school when he worked with Timothy Leary and Richard Alpert (later Ram Dass) on the Harvard Psilocybin Projects. He co-wrote The Psychedelic Experience, and was editor of The Psychedelic Review. He is the co-founder and president of the Green Earth Foundation, an educational and research organization dedicated to the healing and harmonizing of the relationships between humanity and the Earth.
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