Terence McKenna spent twenty-five years exploring and developing an ethno-pharmacology of spiritual transformation, in the process discovering Novelty Theory, which was based part on the sequence of hexagrams in the ancient I Ching, or Book of Changes. Terrence is author of many books, including The Invisible Landscape: Mind, Hallucinogens, and the I Ching. He graduated from the University of California at Berkeley with a distributed major in Ecology, Resource Conservation and Shamanism. McKenna died on April 3, 2000, at the age of 53.

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