The vocabularies with which we talk about freedom as a social and political ideal are badly distorted. They often focus our attention on generic capacities for choice and action, and on the ways in which others’ interference (or our vulnerabilities to interference) threaten these capacities. But our agency does not consist only in a generic power to recognize the options available to us, and to choose from among these options which will become actual. It is essentially social, located in the structures of our interpersonal relationships. These relationships make us, not only persons in some abstract, generic sense, but particular kinds of persons: owners of various kinds of property, participants in various kinds of markets, members of part...