Reprinted from The Hunters (Copyright © 1966), by permission of Prentice-Hall, Inc., Englewood Cliffs, New Jersey. Elman R. Service is Professor of Anthropology at the University of California at Santa Barbara. His ethnological field work has been done mainly in South America and Mexico; his theoretical interests include problems of social and political organization and cultural evolution. Among his books are Profiles in Ethnology and Primitive Social Organization.