Evolutionary psychology and intelligence research cannot be integrated the way Kanazawa (2010) suggested.

Evolutionary psychologists search for human universals, differential psychologists for variation around common human themes. So far, evolutionary psychology and differential psychology seem somewhat disparate and unconnected, although Kanazawa (May–June 2010) is certainly not the first to attempt integrating them (see Penke, 2010, and references therein). Kanazawa uses intelligence to elaborate his view of integration. His evolutionary theory of...