Terence McKenna (November 161946 - April 32000) was the originator of the timewave zero theory, which claims time to be a fractal wave of increasing novelty, which ends in 2012. (see Eschaton). McKenna's theory is related to the theory of the technological singularity, except that McKenna recommended what he called the Archaic Revival as the antidote to the march of technological progress. This appeared to involve a combination of hallucinogenicdrugs, Gaianism, and shamanism.
Books
Psilocybin - Magic Mushroom Grower's Guide (1976), with Dennis McKenna (credited under the pseudonyms OT Oss and ON Oeric)