'Terence Kemp McKenna (November 16, 1946 – April 3, 2000) was a philosopher, social critic, psychonaut, ethnobotanist, lecturer, writer who authored several books. He examined, deconstructed and expounded on a variety of subjects, including: plant-based entheogens, shamanism, metaphysics, psychedelic drugs, epistemology, alchemy, language, culture, technology and theories about the origins of human consciousness. He created a mathematical theory of time (novelty theory) based on patterns found in the I Ching.'
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