Terence McKenna
Terence Kemp McKenna (November 16, 1946 – April 3, 2000) was an American ethnobotanist and mystic who advocated the responsible use of naturally occurring psychedelic plants.
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",[1][2] "one of the leading authorities on the ontological foundations of shamanism",[3] and the "intellectual voice of rave culture".[4]
McKenna formulated a concept about the nature of time based on fractal patterns he claimed to have discovered in the I Ching, which he called novelty theory,[3][5] proposing that this predicted the end of time, and a transition of consciousness in the year 2012.[5][6][7][8]
His promotion of novelty theory and its connection to the Maya calendar is credited as one of the factors leading to the widespread beliefs about the 2012 phenomenon.[9]
Novelty theory is considered pseudoscience.[10][11]