Mechanisms or metaphors? The emptiness of evolutionary psychological explanations.

In recent decades, numerous psychological and sociological theories have been offered in the attempt to explain human cognition, motivation, and behavior in fundamentally evolutionary terms. Drawing inspiration from the Darwinian theory of natural selection, evolutionary approaches to social science argue that behavior arises primarily from underlying evolved psychological mechanisms and that the central task of social science is to identify and articulate the specific nature of such mechanisms. Much effort has been expended by evolutionary social scientists to definitively identify the various evolved psychological mechanisms that account for the diversity of human cognitive, emotional, and social behavior. We argue, however, that the search for evolved psychological mechanisms that adequately account for either the transmission of psychological entities (i.e., emotions, intentions, ideas, behaviors, etc.) across generations or the current existence of such entities cannot in principle succeed because evolutionary social science theorists have fundamentally mistaken their metaphors for mechanisms. [ABSTRACT FROM AUTHOR]