The United States turned to repression when its prominence started to slip in Latin America through establishing military dictatorships.
How do we explain for example the Ebola epidemic in Liberia, Sierra Leone, and Guinea Conakry? Those very powers that swindled and occupied them, in the face of the serious situation of social emergency, have not even had the capacity to send doctors there. In some cases they have sent in militaries instead because that is what they are compelled to do. They have had to send military to do it because they do not even have any doctors with the willingness to risk their lives in order to help those people that are precisely paying for the consequences of years of colonization.
With the Cuban presence in Namibia it was possible to achieve the security and real freedom of that country and the end of Apartheid in South Africa, with the modest contribution of the international military presence in Africa.
Communism is an aspiration, an aspiration is an ideal, a dream, a longing of something that would be perfect, but hard to build because it has to clash with human nature and against the egotism of humans and the egotism of the elites which usually try to guarantee their own interests above those of their nations and of their own people. But they are the ones that prevail because they have the economic power, the political power and the military power.