Why has humankind developed so differently from other animals? How and why did language, culture, religion, and the arts come into being? In this wide-ranging and ambitious essay, Christoph Turcke offers a new answer to these timeworn questions by scrutinizing the phenomenon of the dream, using it as a psychic fossil connecting us with our Stone Age ancestors. Provocatively, he argues that both civilization and mental processes are the results of a compulsion to repeat early traumas, one to which hallucination, imagination, mind, spirit, and God all developed in response. Until the beginning...