I very much enjoyed this book when I was younger. It was good, interesting, innovative, and a fine summary of what we knew at that time. Ardrey supports both the warlike nature of man and ancestry among the gracile austraopithecenes. The latter is now out of favour, but the writing is still good and the author gives a good history of the personalities and fossils behind the hunt for humankind's ancestors. For a book that is 45 years old this holds up remarkably well. ( )