Bruce Ackerman's goal, in Social Justice in the Liberal State, is to provide a new foundation for liberal political theory. Ackerman is dissatisfied with both utilitarian and contractarian defenses of liberal political institutions. Indeed, he writes most persuasively when he is criticizing utilitarians and contractarians, though his criticisms are largely familiar.
Regan, Donald H. Review of Social Justice in the Liberal State, by B. Ackerman. Phil. Rev. 92, no. 4 (1983): 604-7.