[1] He warned repeatedly of the dangers of Soviet communism toward American interests in Latin America.

He was then appointed US Consul General in Shanghai between 1948 and 1949 and was in post when the Communist troops took over the city in May, 1949.

Ambassador to Sweden from 1954 to 1957, Colombia from 1957 to 1959, Brazil from 1959 to 1961, and Poland from 1962 to 1965,[1][8] during the Eisenhower and Kennedy administration.

[1] There is a 27 page transcript from an interview of Cabot, discussing the Alliance for Progress, Bay of Pigs invasion, Cold War, foreign policy, and international relations during the Kennedy administration, archived in the John F. Kennedy Presidential Library and Museum.

[10] As ambassador to Brazil, 1959–1961 his public relations campaigns on behalf of American business angered nationalist politicians and journalists.

[11][12] In December 1954, Cabot, in his role as U.S. ambassador to Sweden, attended the Nobel banquet and read the acceptance speech for the Nobel Prize in Literature awarded that year to Ernest Hemingway who was not present due to ill health.

[15] Together, they were the parents of four children:[16][17] Cabot died at Georgetown University Hospital in Washington, D.C., on February 24, 1981.