There is nothing new about Latin America’s fractious relationship with her northern neighbour. In 1900 the Uruguayan writer José Enrique Rodó published an essay in which he pitted the spiritual in the form of Latin civilisation (Ariel) against the utilitarianism and materialism of the United States (Caliban). Ariel may have been an overblown image but, by trying to construct a pan-Latin American identity, it changed the way Latin Americans thought about themselves.