Why have some countries in Central America and Caribbean had trouble establishing democracies?

Being Banana Republics (They export one crop) Their governments rely heavily on their economy's ability to make money in the world market. (AKA Why does the stock marketfluctuate)

Countries in Central America and the Caribbean have trouble establishing democracies because the US Government supports right wing dictators who are willing to accept bribes in exchange for maintaining an atmosphere in which international bankes and investors can loot the Natural Resources of those countries. Bankers refer to it as "creating and maintaining an atmosphere friendly to capital investments."

"The actual state of violence composed of the malnutrition, ignorance, sickness and hunger of the vast majority of the Guatemalan population, is the direct result of a capitalist system that makes the defenseless Indian compete against the powerful and well--armed landowner."-- Statement by Father Thomas Melville, in Guateamala, 1968