Chapter Four argues that functional explanation in the social sciences should employ social proper functions. As in biology, this requires the ability to make the connection between the consequence of the trait (contribution-to-survival) and the current presence of the trait (persistence-over-time). This leads to a discussion of selection mechanisms and the explanatory work required of them within the social sciences.Chapter Two begins with some comments about the nature of social theories. A brief review of the history of the social doctrine of functionalism follows, along with a more substantial discussion of some of the classic criticisms and the explanatory problems that require resolution in order to have successful functional explanat...