Terence McKenna during a panel discussion at the 1999 AllChemical Arts Conference, held at Kona, Hawaii. (Jon Hanna/Wikimedia Commons)
Who Was Terence McKenna?Psilocybe cubensis, the psilocybin-containing mushroom central to McKenna's "stoned ape" theory of human evolution. (Rohan523/Wikimedia Commons)
Botanical Dimensions, a nonprofit ethnobotanical preserve on the Big Island of Hawaii founded by Kathleen Harrison and Terence McKenna in 1985. (Zac White/Wikimedia Commons)
Was McKenna A Crackpot?