Nuclear Geography and Deterrence

Nine states are generally understood to possess nuclear weapons today: the United States, Russia, the United Kingdom, France, and China, all formally recognized as nuclear-weapon states under the 1968 Nuclear Non-Proliferation Treaty, alongside India, Pakistan, and North Korea, which tested weapons outside that framework, and Israel, which has never officially confirmed or denied possession under a long-standing policy of deliberate ambiguity. The strategic logic binding these arsenals together is mutual assured destruction, the doctrine that a nuclear attack by one state would guarantee a retaliatory strike inflicting unacceptable damage on the attacker, a balance of terror that Cold War strategist Thomas Schelling analyzed at length in Arms and Influence (1966) as a form of coercive bargaining rather than simple military confrontation.