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This book explores the origin and growth of the human mind, drawing on archaeology, history, and the fossil record. It suggests that, as an indirect result of bipedal locomotion, early humans developed a feedback relationship among their hands, brains, and tools that evolved into the capacity to externalize thoughts in the form of shaped stone objects. When anatomically modern humans evolved a parallel capacity to externalize thoughts as symbolic language, individual brains within social groups became integrated into a “neocortical Internet,” or super-brain, giving birth to the mind. Noting that archaeological traces of symbolism coincide with evidence of the ability to generate novel technology, the book contends that human creativity, as well as higher order consciousness, is a product of the superbrain. It equates the subsequent growth of the mind with human history, which began in Africa more than 50,000 years ago. As anatomically modern humans spread across the globe, adapting to a variety of climates and habitats, they redesigned themselves technologically and created alternative realities through tools, language, and art. The book connects the rise of civilization to a hierarchical reorganization of the super-brain, triggered by explosive population growth. Subsequent human history reflects to varying degrees the suppression of the mind's creative powers by the rigid hierarchies of nationstates and empires, constraining the further accumulation of knowledge. The modern world emerged after 1200 from the fragments of the Roman Empire, whose collapse had eliminated a central that could thwart innovation. The text concludes with speculation about the possibility of artificial intelligence and the consequences of a mind liberated from its organic antecedents to exist in an independent, nonbiological form.

On December 21, 1972, sixteen young survivors of Uruguayan Air Force Flight 571 were rescued after spending ten weeks stranded at the crash site of their plane, high in the remote Andes Mountains. The incident made international headlines and spawned several best-selling books, fueled partly by the fact that the young men had resorted to cannibalism to survive. This book examines this story from an evolutionary perspective, weaving together findings and ideas from anthropology, psychology, religion, and cognitive science. During their ordeal, these young men broke “civilized” taboos to fend off starvation and abandoned “civilized” modes of thinking to maintain social unity and individual sanity. Through the power of ritual, the survivors were able to endure severe emotional and physical hardship. The book ties their story to our story, seeing in the mortal rituals of this struggle for survival a reflection of what it means to be human.