...the natural sciences are understood to be continuous. Such is not the case in the behavioral and social sciences. Evolutionary biology, psychology, psychiatry, anthropology, sociology, history and economics largely live in inglorious isolation from one another. Unlike the natural sciences, training in one of these fields does not regularly entail a shared understanding of the fundamentals of the others. In these fields, paying attention to conceptual integration and multidisciplinary compatibility, while not entirely unknown, is unusual. As a result one finds evolutionary biologists positing cognitive processess that could not possibly solve the adaptive problem under consideration, psychologists proposing psychological mechanisms that couls never have evolved, and anthropologists making implicit assumptions about the human mind that are known to be false. The behavioral and social sciences borrowed the idea of hypotheis testing and quantitative methodology from the natural sciences, but unfortunately not the idea of conceptual integration.