Welles became a prominent commentator and author on foreign affairs . In 1945 , he joined the American Broadcasting Company to guide the organization of the " Sumner Welles Peace Forum " , a series of four radio broadcasts providing expert commentary on the San Francisco Conference , which wrote the founding document of the United Nations . He undertook a project to edit a series of volumes on foreign relations for Harvard University Press
San Francisco Conference
United Nations Conference on International Organization
Sumner Welles