The establishment of the League of Nations in 1920 was significant as it represented the first attempt at creating a comprehensive international organization aimed at maintaining peace and preventing future conflicts following World War I. Formed under the Treaty of Versailles, the League sought to provide a platform for negotiation and dialogue among nations, promoting collective security and cooperation. Although it ultimately struggled to enforce its resolutions and prevent aggression, leading to World War II, the League laid the foundation for future international efforts in diplomacy and paved the way for the creation of the United Nations after the war, highlighting the necessity of global governance.