How does "Mountains beyond Mountains explain that the United States supported the junta?

Farmer's strong views on America's foreign policies opens up a whole new world to a complicated history of both Haiti and the United States. He describes the U.S. as a powerful, yet highly imperialistic nation that has continually dictated and taken advantage of many developing and less powerful states and nations, many times reeking havoc in Third World countries like Haiti and Peru, where he's spent much of his life. He mentions that although Haiti became an independent republic in the 1790's, it is indicative of a lengthy, arbitrary relationship with the U.S. that has kept Haiti impoverished and chaotic. Ultimately, Farmer educates people in the First World, making it more difficult for them to blame the victims in the Third World.