The main sponsor of the League of Nations was
Woodrow Wilson
Kaiser Wilhelm
Vladimir Lenin
Neville Chamberlain

Woodrow Wilson

Explanation:

The main sponsor of the League of Nations was the President of the United States, Woodrow Wilson. The League of Nations was established in support of the Treaty of Versailles with the aim of resolving international disputes after the First World War, and that such a horror of war would no longer be repeated. It is considered that the League of Nations is the forerunner of the United Nations, and President Wilson made a major contribution to the formation of the League of Nations as part of the implication of his Fourteen Points, though America did not become a member.

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roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.