Dávila served on the Council of United Nations Relief and Rehabilitation Administration from 1943 to 1946, and was Chilean Representative to the Inter-American Financial and Economic Advisory Committee in 1940. In the same year, he became the author of the “Dávila plan”, which created the Inter-American Development Commission, which became the Inter-American Council for Integral Development within the Organization of American States, when that body was created in 1948. In 1946, he served as a member of the United Nations Economic and Social Council.