Seven decades after its establishment, the United Nations and its system of related organizations and programs are perpetually in crisis. While the twentieth-century’s world wars gave rise to ground-breaking efforts at international organization in 1919 and 1945, today’s UN is ill-equipped to deal with contemporary challenges to world order. Neither the end of the Cold War nor the aftermath of 9/11 has led to the “next generation” of multilateral institutions. But what exactly is wrong with the UN that makes it incapable of confronting contemporary global challenges and, more importantly, can we fix it?