First published in 1981, On Becoming Human presents a unique theory of human origins, an original explanation of how early hominids evolved from their ape-like primate ancestors. Professor Nancy M. Tanner's book integrates the data on chimpanzee behaviour with the available information on early phases of human evolution. The result is a model by which we can more accurately reconstruct the lifeways of the early hominids and better understand the rapid transition from ape to early human. By an innovative use of conventional data and a fresh perspective on traditional anthropological approaches, Professor Tanner, in her first book, has developed a powerful new theory of human origins by which we can understand the actual dynamics of becoming human.