In 1918 Woodrow Wilson proposed this numbered set of principles, one being the removal of trade barriers between nations
The removal, so 
far as possible, of all economic barriers and the establishment of an equality of 
trade conditions among all the nations consenting to the peace and associating... [DOC] [TLE] Our Documents - President Woodrow Wilson's 14 Points (1918) [PAR] Citation: President Wilson's Message to Congress, January 8, 1918; Records of 
the ... 1918, speech on War Aims and Peace Terms, President Wilson set down 
14 ... he proposed the removal of economic barriers between nations, the 
promise... [DOC] [TLE] World War I for Kids: Fourteen Points - Ducksters [PAR] Kids learn about U.S. President Woodrow Wilson's Fourteen Points during World 
War.