Online Publication Date: Apr 2018Print Publication Date: Mar 2018This chapter examines the ethical and political controversies that have accompanied humanitarian intervention (coercive interference by outside actors to address humanitarian suffering within the sovereign jurisdiction of a state). It begins with a historical discussion of the development of humanitarian intervention as a political (rather than legal) practice distinct both from interstate war and formal empire, and how issues of mixed motives, inconsistency, and uncertainties around appropriate scope have affected its legitimacy. The next section examines how humanitarian intervention was “multilateralized” through changing Security Council practice after the end of the Cold ...