 At this conference the post-war international economic structure was designed.The conference was the birthplace of the International Monetary Fund, the World Bank, and the General Agreement on Tariffs and Trade, the last of which would evolve into the World Trade Organization.Later, in 1945, Harry S. Truman selected Acheson as his Undersecretary of United States Department of State; he retained this position working under Secretaries of State Edward Stettinius, Jr., James F. Byrnes, and George Marshall.