When does international intervention work? Efforts by external actors to shape the behavior of sovereign states – such as their economic, political, foreign, and social policies – has received significant attention in international relations scholarship. Yet, the conditions under which intervention succeeds, and the mechanisms through which it does so, remain underspecified. In some cases, intervenors – whether other states, international organizations, or private actors – successfully compel sovereign targets to take actions they otherwise would not, while in others these endeavors have little or no effect. What explains this variation?I explore this question in the context of aid conditionality. Conditionality – in which foreign actors pr...