noun
nuclear deterrent theory
A political/military concept arguing that possessing nuclear weapons prevents attack by other nuclear powers.
冷戦期には核抑止論が安全保障政策の中心だった。
During the Cold War, nuclear deterrent theory was central to security policy.
Compound of 核 (kaku, 'nuclear') + 抑止 (yokushi, 'deterrence') + 論 (ron, 'theory').