In his most readable book, Shepard lays out his thesis that the fundamental nature of humans was formed by our hundreds of thousands of years as hunter gatherers, and that our subsequent lives as nomadic pastoralists or settled agriculturalists have been very destructive not only of our surroundings but of our psyches. The problems created by these last two ways of life have been described by other authors (e.g., Jared Diamond, in The Third Chimpanzee), but Shepard's treatment is rich and impressive. Shepard's language is, in fact, often beautiful, although it is not easy, principally because of vocabulary. This book was the last of four read by the students in my freshman Human Evolution class this past term. About 3/4 of them found it fairly difficult going, but many also found it very rewarding--in fact it deeply affected several. I thought the book's weaknesses were (1) its lack of well-developed ideas about how to reconnect with our Pleistocene heritage, given that we are now stuck with agriculture (and industrialism, etc.)--Shepard presents a long list of possibilities in the last chapter, but many are very unrealistic (and he does not include the learning and practicing of "primitive" technologies, such as making fire by friction, making stone tools, braintanning hides, and so on--a powerful, deeply satisfying way to understand our common past), and (2) his near failure to acknowledge that agriculture can be practiced well, that it need not be destructive, and that it can give one a strong and healthy connection to the land. (Shepard in a chapter endnote does praise Wendell Berry, Wes Jackson, and Gary Snyder for their sort of farming.) These problems are, however, minor; this is an important book, and should be read by any interested in human evolution.