Ian Shapiro, Sterling Professor of Political Science and Global Affairs at Yale, lectures on the legal and political foundations of international intervention. This is lecture thirteen of his DeVane Lecture course Power and Politics in Today's World, delivered at Yale in fall 2019. Shapiro traces the international law background on non-intervention before examining the International Criminal Court and the Responsibility to Protect doctrine, arguing both represented a radical refashioning of the postwar legal and political order. He walks through the interplay of interest, institutions, and ideas that made the ICC and R2P possible, situating their creation within the optimism that followed the end of the Cold War. The lecture is part of a broader course tracing how that early 1990s euphoria gave way to today's politics of fear and resentment, and connects to Shapiro's book After the Fall.