Articles

The Origin of Man

Science  23 Jan 1981:
Vol. 211, Issue 4480, pp. 341-350
DOI: 10.1126/science.211.4480.341

Abstract

Five characters separate man from other hominoids—a large neocortex, bipedality, reduced anterior dentition with molar dominance, material culture, and unique sexual and reproductive behavior. Evidence provided by the fossil record, primate behavior, and demographic analysis shows that the traditional view that early human evolution was a direct consequence of brain expansion and material culture is incorrect, and that the unique sexual and reproductive behavior of man may be the sine qua non of human origin.

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