The Road To Pearl Harbor, 1919-1941 Season 1 Episode 10 Latin America: Intervention In Our Own Backyard:

FDR' greatest foreign policy success, "The Good Neighbor Policy", was a key development in reversing the U.S. imperialistic attitude toward Latin America. For over a century, the Monroe Doctrine had been invoked to justify intervention in the Caribbean, Central, and South America. Pan-American relationships deteriorated rapidly until 1933, when the policy in intervention was abolished.