In 1918, Wilson presented to the US Congress his Fourteen Points as a guide for a peace settlement after World War I. He emphasized "open covenants of peace, openly arrived at," to change the usual method of secret diplomacy practiced in Europe. Wilson's idealistic message also laid the groundwork for the creation of the League of Nations. Opposition to the points quickly developed, however, and the subsequent treaty between Germany and the Allies sowed the seeds for what conflict?