Who was the sponsor of the league of nations?

The League of Nations was primarily sponsored by the United States, particularly under President Woodrow Wilson, who was a key advocate for its establishment after World War I. However, the U.S. never officially joined the League due to opposition in Congress. Other founding members included the United Kingdom, France, Italy, and Japan, who played significant roles in shaping its structure and objectives. The League aimed to promote peace and cooperation among countries to prevent future conflicts.