In this dissertation I put forth a defense of liberalism understood in terms of the principle of state neutrality. In the first half of the dissertation, I attempt to show that a commitment to state neutrality is a central element running through the liberal tradition. I argue for this by examining closely the liberal theories offered by Locke, Mill, Hobhouse, and Rawls. In the second part, I defend liberal neutrality against two prominent criticisms: first, that it is flawed because it (...) cannot acknowledge the importance of certain distinctive virtues needed for a flourishing human life; second, that it fails to account for the importance of civic virtues in citizens and so leads to serious sustainability problems for liberal societies. I conclude that liberal neutrality, properly understood, can withstand both of these criticisms and offers a viable and attractive model of political association. (shrink)