The search for information about man’s evolutionary history has gradually yielded a wealth of fossil evidence that, together with accumulations of stone tools and detailed mapping of bones and other artifacts found on living sites, has given us an ever-growing understanding of man’s physical and cultural evolution. The fossil evidence, however, provides us with few clues as to the social behavior of our earliest known ancestors. An attempt has been made to reconstruct some aspects of prehistoric man’s social life by drawing on our growing knowledge of the social behavior of the living primates. (87 pp.)