The failure of the League of Nations, established after World War I to prevent future conflicts, teaches us the importance of strong international cooperation and enforceable agreements. The League struggled with decision-making and lacked the military power to enforce its resolutions, contributing to its ineffectiveness against the rising tide of aggression in the 1930s. This experience highlighted the need for a more robust framework for global governance, ultimately leading to the creation of the United Nations after World War II. The League's shortcomings emphasized that peace requires not just dialogue, but also commitment and the capability to act.