A turning point in psychology and human historyLoaded with case studies which present a unified model of human consciousness - a revolutionary map of the mind that explains our evolution, behavior, personality, and the mind-body connection - this work takes readers on a compelling journey into the mind, human behavior, and future of humankind.This mesmerizing, surreal account of the bizarre adventures of Terence McKenna, his brother Dennis, and a small band of their friends, is a wild ride of exotic experience and scientific inquiry. Exploring the Amazon Basin in search of mythical shamanic hallucinogens, they encounter a host of unusual characters - including a mushroom, a flying saucer, pirate Mantids from outer space, an appearance by James and Nora Joyce in the guise of poultry, and translinguistic matter - and discover the missing link in the development of human consciousness and language.