What strategy did world leaders use to prevent future internatinal conflicts following world war 2?

Following World War II, world leaders established the United Nations (UN) to foster international cooperation and dialogue, aiming to prevent future conflicts. They prioritized diplomacy, collective security, and the promotion of human rights through various treaties and organizations. Additionally, initiatives like the Marshall Plan aimed at rebuilding war-torn Europe, creating economic stability and reducing the risk of conflict. These strategies collectively sought to address the underlying causes of war and promote lasting peace.