The Good Neighbor policy was the foreign policy of the administration of United States President Franklin Roosevelt towards Latin America. Although the policy was implemented by the Roosevelt administration, President Woodrow Wilson had previously used the term—but subsequently went on to invade Mexico. Senator Henry Clay had coined the term Good Neighbor in the previous century.
The policy's main principle was that of non-intervention and non-interference in the domestic affairs of Latin America. It also reinforced the idea that the United States would be a "good neighbor" and engage in reciprocal exchanges with Latin American countries. Overall, the Roosevelt administration expected that this new policy would create new economic opportunities in the form of reciprocal trade agreements and reassert the influence of the United States in Latin America; however, many Latin American governments were not convinced.
In the late 19th and early 20th centuries, the United States periodically intervened militarily in Latin American nations to protect its interests, particularly the commercial interests of the American business community. After the Roosevelt Corollary of 1904, whenever the United States felt its debts were not being repaid in a prompt fashion, its citizens' business interests were being threatened, or its access to natural resources were being impeded, military intervention or threats were often used to coerce the respective government into compliance. This made many Latin Americans wary of U.S. presence in their region and subsequently hostilities grew towards the United States.
In an effort to denounce past U.S. interventionism and subdue any subsequent fears of Latin Americans, Roosevelt announced on March 4, 1933, during his inaugural address, "In the field of World policy, I would dedicate this nation to the policy of the good neighbor, the neighbor who resolutely respects himself and, because he does so, respects the rights of others, the neighbor who respects his obligations and respects the sanctity of his agreements in and with a World of neighbors." In order to create a friendly relationship between the United States and Central as well as South American countries, Roosevelt sought to stray from asserting military force in the region. This position was affirmed by Cordell Hull, Roosevelt's Secretary of State at a conference of American states in Montevideo in December 1933. Hull said: "No country has the right to intervene in the internal or external affairs of another." Roosevelt then confirmed the policy in December of the same year: "The definite policy of the United States from now on is one opposed to armed intervention."
The Good Neighbor Policy terminated the U.S. Marines occupation of Nicaragua in 1933 and occupation of Haiti in 1934, led to the annulment of the Platt Amendment by the Treaty of Relations with Cuba in 1934, and the negotiation of compensation for Mexico's nationalization of foreign-owned oil assets in 1938.
The United States Maritime Commission contracted Moore-McCormack Lines to operate a "Good Neighbor fleet" of ten cargo ships and three recently laid-up ocean liners between the United States and South America. The passenger liners were the recently defunct Panama Pacific Line's SS California, Virginia and Pennsylvania. Moore-McCormack had them refurbished and renamed them SS Uruguay, Brazil and Argentina for their new route between New York and Buenos Aires via Rio de Janeiro, Santos and Montevideo.
The policy sought to redefine the way Americans perceived Latin Americans, while at the same time maintaining hemispheric unity. In order to accomplish this, Roosevelt created the Office of the Coordinator of Inter-American Affairs (OCIAA) in August 1940 and appointed Nelson Rockefeller to head the organization. The OCIAA was essentially a propaganda tool used by the United States to define Latin American society, as they perceived it. One division within the OCIAA, the Motion Picture Division, was headed by John Hay Whitney, with the main intent to abolish preexisting stereotypes of Latin Americans that were prevalent throughout American society. Whitney was convinced of "the power that Hollywood films could exert in the two-pronged campaign to win the hearts and minds of Latin Americans and to convince Americans of the benefits of Pan-American friendship." In order to accomplish this, Whitney urged film studios to hire Latin Americans and to produce movies that placed Latin America in a favorable light. Further, he urged filmmakers to refrain from producing movies that perpetuated negative stereotypes. Historically, Latin Americans were lackadaisically portrayed as lazy, backwards and suspicious. One film star who emerged then was Carmen Miranda. Used as a product to promote positive hemispheric relations, her films, including The Gang's All Here, explicitly promoted the Good Neighbor policy.
Similarly, in 1941 Edmund A. Chester at CBS Radio collaborated with the OCIAA to create the "La Cadena de las Américas" (Network of the Americas) radio network to broadcast news and cultural programs which reflected Roosevelt's Good neighbor Policy and Pan-Americanism throughout latin America during World War II. As a professional journalist, Chester insisted upon the presentation of accurate news programming as well as cultural programs which dispelled the negative stereotype of Americans toiling as automatons in a national industrial machine.  Also, the policy's cultural impact included the launch of CBS Radio's Viva América and Hello Americans programs and the Walt Disney films Saludos Amigos (1942) and The Three Caballeros (1944).
The 1939 New York World's Fair was just the place to promote neighborly relations between the United States and Latin America. Placed against the backdrop of a growing Nazi threat, the World’s Fair was an attempt to escape from the looming prospect of war and to promote peace and interdependence between nations. With the fair boasting over 60 countries, with some coming from Latin America, it was the place to redefine negative Latin American stereotypes. Argentina, Brazil, Chile, Venezuela, Cuba, Mexico, Nicaragua and the Pan American Union were all represented at the World’s Fair. Each country seized the opportunity to showcase their country and to make it more appealing to those around the world, especially in the United States. In their bid to increase cultural awareness at the World’s Fair, each country promoted tourism, and strived to compare itself to the United States in an effort to appeal to Americans.
The era of the Good Neighbor Policy ended with the ramp-up of the Cold War in 1945, as the United States felt there was a greater need to protect the Western Hemisphere from Soviet influence. The changes conflicted with the Good Neighbor Policy's fundamental principle of non-intervention and led to a new wave of US involvement in Latin American affairs. Until the end of the Cold War the United States directly or indirectly attacked all suspected socialist or nationalist movements in the hope of ending the spread of Soviet influence. U.S. interventions in this era included the CIA overthrow of Guatemala's President Jacobo Árbenz in 1954, the unsuccessful CIA-backed Bay of Pigs Invasion in Cuba in 1961, occupation of the Dominican Republic 1965-66, CIA subversion of Chilean President Salvador Allende in 1970–73, Operation Charly in Central America, the Plan Condor in South America, and CIA subversion of Nicaragua's Sandinista government from about 1981 to 1990.
After World War II, the Organization of American States was established in 1949. However, the U.S. began to shift its focus to aid and rebuilding efforts in Europe and Japan. These U.S. efforts largely neglected the Latin American countries, though U.S. investors and business men did have some stake in the nations to the South. In the late 1950s, United States strengthened relations with Latin America, launching the Inter-American Development Bank and later the Alliance for Progress. However, in the late 1960s, as part of the Cold War, the United States government provided support to right-wing dictatorships with Operation Condor. Also, in the context of the War on Drugs, the United States government has collaborated with local governments to fight cartels, for example with the Plan Colombia and the Mérida Initiative.