LEVELS OF SELECTION AND METHODOLOGICAL INDIVIDUALISM

Whitman argues that group selection is consistent with methodological individualism. He begins by defining a weak form of methodological individualism in which agents are not necessarily self-interested or rational and shows that this form is consistent with Sober and Wilson’s model of group selection. However, Sober and Wilson’s group selection is also consistent with a methodological individualism in which the individuals are rational and self-interested, and consistent with individual selection as well. A version of group selection similar to what Hayek may have had in mind when he talked about groups out-competing other groups is presented, however, this is not a version of group selection that is compatible with methodological individualism.