In 1918 Woodrow Wilson proposed this numbered set of principles, one being the removal of trade barriers between nations
Delivered in Joint Session, January 8, 1918 ... Parleys have been in progress at 
Brest-Litovsk between Russsian ... definite statement of the principles upon which 
they would be willing to .... of trade conditions among all the nations consenting 
to the peace and associating themselves for its maintenance.