In this thought-provoking new book, Bruce Lerro offers a speculative reconstruction of the sacred beliefs and practices of cultures existing between 30,000 and 500 B.C.E. Lerro describes how material changes in various social formations-including hunting-gathering bands and horticulturalists in villages-were responsible for the shift from magic to realism, from the belief in earth spirits to faith in sky gods. Drawing from such diverse theorists as...