As human populations continue to grow, so larger organisational structures will need to be formed as an extension of a higher degree fractal of regionalisation, a concept I describe as 'super regionalisation'. The first real example of this is the European Union, although this structure is fatally flawed by the negative demographics at the heart of the old Europe. There will no doubt be other 'super regions' to come and one of these could well be an 'alliance of the Americas'.
The process of the regionalisation of Latin America has clearly seen Brazil emerge as the dominant single nation in the region, with some 193 million of a total of 572 million population on the continent, contributing to 40% of the region's total GDP. This massive success is partly due to the underlying power of the demographic expansion of Brazil, as well as the pragmatic nature of its people, and has taken place despite the less than optimal policies of the country's popular President from 2003-2010 Luiz Inácio Lula da Silva.
Argentina has a rich history which is closely linked to its European origins and one that defines its very nature. It was the Spanish who first came for the silver, but after independence from Spain was declared in 1816, when the Argentine flag was officially adopted by the rebels, the ensuing Argentine War of Independence attracted disenfranchised ex French Bonapartists and Italians whose influence dominated for a few decades.