This article examines a series of debates about civil disobedience, conscription, and the justice of war that took place among American liberal philosophers, lawyers, and activists during the civil rights movement and the Vietnam War. It argues that these debates fundamentally reshaped American political philosophy, by shifting the focus from the welfare state to the realm of international politics. In order to chart this transition from the domestic to the international, this article focuses on the writings of two influential political theorists, John Rawls and Michael Walzer. The turn to international politics in American political philosophy has its origins, in part, in their arguments about domestic citizenship. In tracing these origins, this article situates academic philosophical arguments alongside debates among the American public at large. It offers a first account of the history of analytical political philosophy during the 1960s and 1970s, and argues that the role played by the Vietnam War in this history, though underappreciated, is significant.