Answer:
In 1919, President Woodrow Wilson believed that the Paris Peace Conference treaty, which ended World War I, would create a lasting peace by establishing a League of Nations to resolve international disputes. Wilson was a strong advocate for the League of Nations, which he saw as a way to prevent future wars by promoting international cooperation and diplomacy. Despite his efforts, however, the United States Senate refused to ratify the Treaty of Versailles, which included the provisions for the League of Nations. The failure of the United States to join the League of Nations was a significant blow to Wilson's vision for a more peaceful world.