International Cooperation on WMD Nonproliferation

International efforts to prevent the spread of weapons of mass destruction (WMD)—including nuclear, biological, and chemical weapons—rest upon foundations provided by global treaties such as the Nuclear Non-Proliferation Treaty (NPT) and the Chemical Weapons Convention (CWC). Over time, however, states have created a number of other mechanisms for organizing international cooperation to promote nonproliferation. Examples range from regional efforts to various worldwide export-control regimes and