Hi, I think, Naturally, if Mercosur members become successful in their alliance they may be success in UNASUR, Mercosur aims to promote free trade and the free exchange of goods, labor and currency among members. And we should not forget that the nature of Mercosur and other Latin American alliances is against North America and to influence Europian union.

The first "weakness" of This alliance is a non-industrial economies of its members. and,On the other hand, the countries who have moved towards industrialization, they have distanced from their anti-Western and anti-Americanism nature. In fact, we have two contradictory movements within the regional integration of Latin American countries. the movement that Strength their Commonalities in a  framework of regional integration (like Mercosur, and Andean Community of Nations (CAN) and UNASUR)  and other movement that  take they away from their nature and their identities.Because the West is the origin of the Industry, so Moving towards industrialization without benchmarking of Western values and preserving indigenous values is difficult, but not impossible. therefor, Latin American countries, need a local model for their regional integration. The model that will lead them to develop and maintain their native culture.

Regional integration is rooted primarily in Europe, but every area of the world is in need of your particular model.

I have to say that the most important strong point ofLatin America for regional integration is theRich and unique culture of the people and countries of the region.

UNASUR is pretty much a superstructure built over MERCOSUR and CAN - and it definitely has a more political dimension. It was pretty much Hugo Chavez's initiative - I wonder how it is going to evolve without his charisma. MERCOSUR is a form of economic integration as such. UNASUR - in my opinion - more a declaration of regional identity and aims at gaining more political meaning.

I agre with the concept of superstructure and the political dimension.  but Mercosur could soon have the same State parties than Unasur. and this would join economic integration and poliltical one. And I think Brazil could lead the process

Regarding UNASUR according to the newest article written by  Christopher Sabatini in Foreign Affairs titled "Meaningless Multilateralism In International Diplomacy, South America Chooses Quantity Over Quality", I can point to two challenges which UNASUR is facing.