President Wilson proposed the Fourteen Points plan for a just peace after World War I that included open diplomacy, free trade, and a League of Nations. However, France and Britain rejected Wilson's plan and imposed a harsh Treaty of Versailles on Germany that crippled its economy through war reparations and territorial losses. The treaty was also criticized for not respecting Woodrow Wilson's principle of self-determination for colonized peoples. While Wilson advocated for US membership in the League of Nations, the US Senate refused to ratify the treaty, leaving the country isolated and the League weakened.