Global politics has changed with unaccustomed swiftness since the end of the Cold War. Eastern Europe is free; the Soviet Union has broken up; China presses free market economic reform; and the United States and Russia have declared a joint commitment to end nuclear war. The force of these changes has created a new agenda for global politics and security policy. This does not mean that nuclear weapons have lost their centrality. Nuclear development programs continue in the major holders of advanced weapons. In Israel, Pakistan, India, North Korea, Iraq, and Iran nuclear intentions...