Which institution emerged after WWI to promote collective security?

• A. The United Nations
• B. The League of Nations
• C. The European Union
• D. The International Monetary Fund

Answer: (B)

After World War I, there was a strong push to create a system where nations would act together to deter aggression and maintain peace. The League of Nations, established in 1919 through the Treaty of Versailles, embodied that idea of collective security. It set up mechanisms for resolving disputes, coordinating sanctions, and promoting disarmament and humanitarian efforts, all aimed at preventing another catastrophic war. While it faced challenges—most notably that the United States never joined, and powerful states sometimes pursued their own interests—it represented the era’s best attempt to secure peace through international cooperation after the war. In contrast, the United Nations arose after World War II to carry forward the same goal on a broader, more inclusive stage; the IMF focuses on economic stability, and the European Union developed later as a regional economic and political project rather than an immediate postwar security alliance.