Having traced the genealogies of powerful local leaders, he showed that the countries of Central America have always been ruled by a handful of families, each of which can trace its roots back to a conquistador who traveled with Cortés. Starting around 1910, these families, who long ruled in partnership with the military, began to be replaced by banana men, who used their wealth and influence to strike their own deals with the generals, overthrowing the aristocrats, becoming aristocrats themselves.

