ABSTRACT
During the 1970s, archaeological remains from the period of the earliest appearance of stone tools were frequently interpreted as evidence for a complex set of functionally linked hominid behaviors (Isaac 1978a, 1978b). These included a sexual division of labor, significant investment by adult males and females in the care of offspring, the development of language, and a family-based form of social organization. All of these behaviors were viewed as the evolutionary consequence of a shift to hunting on the part of our ancient hominid ancestors.
