" Conway Zirkle and the Persistence of "Marxian Biology" in the Western Social Sciences" by J.W. Jamieson

There can be no doubt that the influence of those who oppose the application of the findings of biological and genetic research to the understanding of human social behavior was greatly enhanced by the temporary fashion for "Social Darwinism" at the turn of the century, with its erroneous emphasis upon individual competition in evolution to the exclusion of group competition. Social Darwinists did not see that cooperation within the group enhanced the competitiveness of the group in its struggle for survival against other groups - and that altruism and loyalty were powerful forces for the survival of the group, race or lineage. The fact that altruism has survival value, when practiced in favor of members of the altruist's own gene pool, was not apparent to the Social Darwinists, who did not fully realize that from the evolutionary point of view it is the gene pool, the race or lineage which is important, not the individual per se. This defect in primitive Social Darwinists thinking made it easier for Marxian social philosophers to downplay the significance of biological forces to the human social system and to promote instead their own distorted concepts of direct genetic subordination to environmental forces. "

― J.W. Jamieson