Terence Kemp McKenna was an American ethnobotanist, lecturer, and author who advocated for the responsible use of naturally occurring psychedelic plants and mushrooms. He spoke and wrote about a variety of subjects, including psychedelic drugs, plant-based entheogens, shamanism, metaphysics, alchemy, language, philosophy, culture, technology, ethnomycology, environmentalism, and the theoretical origins of human consciousness. He was called the "Timothy Leary of the '90s", "one of the leading authorities on the ontological foundations of shamanism", and the "intellectual voice of rave culture". Critical reception of McKenna's work was deeply polarized, with critics accusing him of promoting dangerous ideas and questioning his sanity, while others praised his writing as groundbreaking, humorous, and intellectually provocative. Born in Colorado, he developed a fascination with nature, psychology, and visionary experiences at a young age. His travels through Asia and South America in the 1960s and '70s shaped his theories on plant-based psychedelics, particularly psilocybin mushrooms, which he helped popularize through cultivation methods and writings. From Wikipedia (https://en.wikipedia.org/wiki/Terence...) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/b...)