The document discusses the theory of nuclear peace, which argues that nuclear weapons can induce stability and decrease the chances of crisis escalation between countries. It presents arguments that when mutual second-strike capabilities exist between two countries, the costs of war are too high, leading to restraint. Examples provided include stability during the Cold War and peace talks between India and Pakistan. However, critics argue that decision-makers are not always rational and could make hasty decisions leading to nuclear war, or that technological developments could undermine mutual second-strike capabilities.