Abstract

I defend the truth of the principle of methodological individualism in the social sciences. I do so by criticizing mistaken ideas about the relation between individual people and social entities held by earlier defenders of the principle. I argue, first, that social science is committed to the intentional stance; the domain of social science, therefore, coincides with the domain of intentionally described human action. Second, I argue that social entitites are theoretical terms, but quite different from the entities used in the natural sciences to explain our empirical evidence. Social entities are conventional and open-ended constructions, the applications of which is a matter of judgment, not of discovery. The terms in which these social entities are constructed are the beliefs, expectations and desires, and the corresponding actions of individual people. The relation between the social and the individual 'levels' differs fundamentally from that between, say, the cellular and the molecular in biology. Third, I claim that methodological individualism does not amount to a reduction of social science to psychology; rather, the science of psychology should be divided. Intentional psychology forms in tandom with the analysis of social institutions, unitary psycho-social science; cognitive psychology tries to explain how the brain works and especially how the intentional stance is applicable to human behavior.