“…Since the range and type of data as well as the methods of investigation that are considered legitimate in a science are in large part determined by the theoretical paradigm guiding its research programs, it is of no small consequence to note that the sociobiological investigation of human behavior yields "incomplete data" -especially when, as Barkow asserts, this incompleteness cannot, even in principle, place the theoretical formulation in jeopardy. I would suggest, and suspect that Barkow would agree, that we need to be wary of any theoretical framework that requires us to deal only with data from a single level of systemic organization (see Rubinstein and Laughlin 1977). Yet this is precisely what sociobiology urges us to do.…”