The United States is the world's leading foreign aid donor. Yet there has been little inquiry into how such assistance affects the politics and societies of recipient nations. Drawing on four decades of data on US economic and military aid, Aiding and Abetting explores whether foreign aid does more harm than good. Jessica Trisko Darden challenges long-standing ideas about aid and its consequences, and highlights key patterns in the relationship between assistance and violence. She persuasively demonstrates that many of the foreign aid policy challenges the US faced in the Cold War era, such as the propping up of dictators friendly to US interests, remain salient today. Historical case studies of Indonesia, El Salvador, and South Korea illustrate how aid can uphold human freedoms or propagate human rights abuses. Aiding and Abetting encourages both advocates and critics of foreign assistance to reconsider its political and social consequences by focusing international aid efforts on the expansion of human freedom.