The League of Nations played a pivotal role in international politics following World War I, as it was established to promote peace and prevent future conflicts through collective security and diplomacy. Its main goals included disarmament, settling international disputes, and improving global welfare. Although it successfully mediated some disputes and promoted cooperation through agencies focusing on health, labor, and refugees, it ultimately struggled with enforcement powers and the absence of key nations like the United States. The League's failure to prevent aggression in the 1930s, particularly with the rise of fascism, highlighted its limitations and set the stage for the formation of the more robust United Nations after World War II.