Which international organization was formed after World War II to maintain international peace and security?

• A. United Nations
• B. League of Nations
• C. NATO
• D. Organization of American States

Answer: (A)

The main idea here is recognizing which global body was created after World War II to promote and sustain international peace and security. The United Nations was established in 1945–46 through the UN Charter with the aim of preventing future wars, settling disputes through diplomacy, and coordinating humanitarian and developmental efforts on a global scale. This global scope and focus on collective security set it apart from the other options. The League of Nations, by contrast, existed after World War I but failed to prevent the second conflict, so it’s the earlier predecessor that the United Nations replaced. NATO, formed in 1949, is a military alliance built for collective defense during the Cold War, not a broad mechanism for maintaining peace and security worldwide. The Organization of American States is a regional body, created to address matters in the Western Hemisphere rather than global security. So the United Nations best fits the description of an international organization formed after World War II to maintain international peace and security.