The organization established to promote peace and prevent future global conflicts after World War I is the League of Nations. Formed in 1920, following the Treaty of Versailles, its primary goal was to foster international cooperation and resolve disputes through dialogue rather than warfare. The League aimed to improve global conditions through arms reduction, economic sanctions, and collective security. Despite its ideals, the League faced challenges, including the absence of the United States and difficulties in enforcing decisions, ultimately leading to its ineffectiveness. The League of Nations set the groundwork for the creation of the more influential United Nations after World War II.