The U.N.'s failures, from its inability to stop ethnic cleansing in Rwanda, Bosnia, and Sudan to widespread abuses by U.N. peacekeepers across Africa, are legion. Inaction, incompetence, and even abject inhumanity have all too often been the hallmarks of U.N. operations, which have frequently demonstrated a callous indifference to human suffering. Whether the U.N. goes the way of its predecessor, the League of Nations, and sinks into the abyss of history as an irrelevant failure depends upon its willingness to be reformed as well as its ability to aggressively confront the challenges of today, whether it be the threat of global terrorism, the aggressive actions of a dictatorial regime, or the mass slaughter of one ethnic group by another. Terrorism, tyranny, and genocide remain the three great evils of our time, and the U.N. will be judged by how it responds to them. If it is not up to the task, then it will be time to take a bow and give way to a successor.