This film is loosely based on the novel of the same name by Burdick and Lederer, but departs from the novel in some significant particulars that I won't get into here. I think it is important to view this film as a period piece. Released in 1963 before the assassination of JFK and the escalation of the war in Viet Nam, the story retains a certain degree of naiveté about the role of the United States in the world and the perceptions of the United States that existed in other countries. This film would have looked quite different had it been shot in 1968 or 1969, by which time the country had long since shed any illusions about the nation's role in the world. In some ways, this provides a kind of still photo of the United States just prior to the Kennedy assassination and the tumultuous sequence of events that unfolded afterward. For that reason, this is a fascinating period piece that survives Brando's chewing on the scenery and a screen play that departs in unfortunate ways from the outstanding novel.