Methodological Individualism and Reductionism

This chapter analyzes the relationship between methodological individualism (MI) and reductionism. While the latter term is mainly used in reference to MI with a negative meaning, i.e. as a synonym of a naively atomistic and non-structural approach, it is also, though rarely, used to couch MI in terms of a non-atomistic micro-foundationalism that is compatible with systemic explanations (e.g. Elster). This chapter investigates the legitimacy of the pejorative use of the term reductionism with respect to MI. Three points are developed. First, the chapter argues that two different kinds of interpretation of MI in terms of naively atomistic reductionism can be distinguished: one in terms of psychological reductionism and the other in terms of semantic reductionism, the latter of which has a nominalist and an anti-nominalist variant. Second, the chapter explains why the different interpretations of MI in terms of naively atomistic reductionism are unfounded. Third, the chapter analyzes and criticizes the view that MI must be replaced by a new anti-reductionist approach understood as a middle ground between holism and MI.