Argues that human urban social complexity has been made possible by social evolution rather than biological evolution, and that this social evolution has had to counter individual selfish tendencies which biological evolution has continued to select as a result of the genetic competition among the cooperators. (Author/JM)

Presents pro and con comments with regards to 1975 APA presidential address under the heading of biological versus social evolution. Other comments are subsumed under the headings of the genetic basis of behavior-especially of altruism, and the value of tradition. (Author/AM)

Presents pro and con comments with regards to 1975 APA presidential address under the heading of the value of traditions. Other comments are subsumed under the headings of biological versus social evolution, and the genetic basis of behavior especially of altruism. (Author/AM)

Notes that most of those who criticized the authors' 1975 APA presidential address seem to explicitly or implicitly share the belief that issues discussed are important areas of study on which divergent perspectives should be developed and discussed even where the best available evidence falls far short of dependable scientific fact. (Author/AM)

Presents an overview of the contributors' reactions and summarizes the controversies which arose from the 1975 APA presidential address. Thoughts on behaviorism as well as evolutionary theory in American psychology are also presented. (Author/AM)

The choice between genetic and environmental explanations is most properly based on "jointly genetic/environmental designs," which control for both genetic and environmental differences in a behavior genetic framework. (Author/GC)