According to Ronald Dworkin, political obligation is to be justified as an associative obligation through membership in certain political communities. In this regard, I first argue that the concept of an associative obligation cannot help us to account for precise moral obligations. Second, I analyze certain disanalogies between paradigmatic cases of associative obligation and political obligation in order to show the inability of the former to justify the enforcement of a comprehensive obligation such as the latter. Finally, I argue that (...) Dworkin could not have provided a better argument: His theory of law makes him incapable of justifying political obligation. (shrink)