principle of collective security. That principle necessarily en tails the possibility of military enforcement measures by the United Nations. Twice in its history the Security Council has authorized such action. The first instance was in the Korean War in 1950; the second was in the Persian Gulf in 1990. More occasions are likely follow. The U.N. Charter gives the Security Council the authority to maintain or restore international peace and security, and enforce the will of the council on a state that has broken the
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Russett et al. (1991) studied this question.