"Trigger writes about sociocultural evolution in clear, authoritative prose, informed by a marvelous breadth of scholarship in archaeology, anthropology and history. His historical essay stands as a powerful reminder that diverse social theorists have in common compelling issues and unsolved problems; equally, it is a vigorous tribute to the analytical and moral strengths of the Enlightenment heritage. It is a book to savor, debate, teach, and press on colleagues, students and friends alike." Professor Bruce Winterhalder, University of North Carolina at Chapel Hill