The principle of national self-determination has usually been justified by extending to national groups an entitlement that individuals are regarded as having, namely, to the conditions necessary for their self development. In order to extend the concept of self-determination to nations in this way, an argument that it is important for nations to exist within their own political communities must be given. In this essay, I describe and criticize one type of argument for such a principle of national self-determination – (...) what I will call the communitarian argument.Contemporary communitarians (such as Michael Walzer and David Miller) usually contend that determining who rightfully has membership in a political community must precede the allocation of rights and responsibilities between members. Community is understood to mean a national community; membership in communities therefore results from the ascription of national identities to individuals and to the consequent sorting out of loyalties that follows from this ascription. A right of self-determination for nations is required, on this view, in order to ensure that political communities are legitimately formed in accordance with national identities. (shrink)