Final answer:
During the peace conference at Versailles, President Woodrow Wilson argued for his Fourteen Points, which emphasized self-determination, free trade, and the establishment of a League of Nations.
Step-by-step explanation:
During the peace conference at Versailles, U.S. President Woodrow Wilson argued for his Fourteen Points, which emphasized self-determination of peoples, free trade, open diplomacy, reductions in armaments, freedom of the seas, and the establishment of a League of Nations to prevent future conflicts through international cooperation. Wilson believed that these principles would lead to a just and lasting peace in Europe and the world.