Mescaline became a popular sensation in the mid-twentieth century through Aldous Huxley's The Doors of Perception, after which the word "psychedelic" was coined to describe it. Its story, however, extends deep into prehistory: the earliest Andean cultures depicted mescaline-containing cacti in their temples. Mescaline was isolated in 1897 from the peyote cactus, first encountered by Europeans during the Spanish conquest of Mexico. During the twentieth...