And there were numerous instances of leftist movements in this region, but so far the United States had not undertaken any action to stabilize the status quo — at the moment – because that was dedicated to World War II. At the end of this conflict broke out again the antagonism between capitalist and socialist system with the Cold War. In 1948 began this conflict fully, and that was when the government America is bent in a repressive direction toward Latin America. Washington began to move away by the reformist path and was at this time where he began to encourage the establishment of schemes and pro-capitalist forces antileftist in underdeveloped countries. 8 And here, where once again, it is observed the striking similarity between the animal and the international system, ie the parasite, to be threatened develops strategies to avoid the defense mechanisms of their hosts and many get to be resistant to drugs and insecticides applied to control them, and did the same thing as the U.S., given that much of the danger posed by these leftist movements, and begin to develop strategies to maintain their influence in Latin America.

One of the first actions that the U.S. defense made was the implementation of instruments and mechanisms adopted by the Inter-American community in the years 1947 and 1948: the Rio Treaty and the OAS. Among the various legal principles that had these treated, there was a very important non-intervention, and establishing the "safety" of sovereignty between states. Once the Cold War deepened, the U.S.