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Ram Dass
American contemporary spiritual teacher and the author of the 1971 book Be Here Now
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Timothy Leary
American psychologist (1920-1996)
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Terence McKenna
American ethnobotanist
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Christian Rätsch
German ethnopharmacologist, anthropologist, author
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Michael Harner
American anthropologist
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Alan Watts
British populariser of eastern religious philosophy, writer and speaker
