This article criticizes Bourdieu's and Giddens's overintellectualizing accounts of human activity on the basis of Wittgenstein's insights into practical under standing. Part 1 describes these two theorists' conceptions of a homology between the organization of practices (spatial-temporal manifolds of action) and the governance of individual actions. Part 2 draws on Wittgenstein's discussions of linguistic definition and following a rule to criticize these conceptions for ascribing content to the practical understanding they claim governs action. Part 3 then suggests an alternative, Wittgensteinian (...) account of the homology between practices and actions that avoids this pitfall. (shrink)