Established after World War I, the League of Nations was intended to maintain peace and prevent conflicts between nations. However, it was largely ineffective in stopping the rise of aggressive regimes and the outbreak of World War II. The League's inability to enforce its resolutions and its lack of participation from major powers led to its eventual dissolution.

Created in 1945 after World War II, the UN was established to succeed the League of Nations. It aimed to address the shortcomings of its predecessor by providing a more effective framework for international cooperation, peacekeeping and the protection of human rights. The UN has a broader membership and more robust mechanisms for enforcing its resolutions and promoting global stability.