I came across this in the provenance of a map of airmail routes in 1940:
Lloyd Welch Pogue (October 21, 1899 – May 10, 2003) American aviation lawyer and chairman of the Civil Aeronautics Board. Pogue, a native of Grant, Iowa, was instrumental in forming the policy structure that led civil aviation through World War II and into the booming Post-War Period. He was appointed Chairman of the CAB by President Franklin Delano Roosevelt, and he served as Chairman until 1946. During his tenure Pogue helped strike down a plan for a single world airline.
(Italics mine) United States Air Mail Service Post Office Department.
I can find references to the 1944 Chicago Conference, in which Pogue was a major contributor, but I can only find mention of the results, the "Five Freedoms of the Air".
Was there a serious effort by any country or party to create "one world airline" in this period? If so, how instrumental was Pogue in defeating this idea and implementing the system that emerged? The issue (and its resolution) seems to me to be terrifically indicative of how the post-war order was envisioned.