BUENOS AIRES. After seventy-two hours of closed-door meetings, the heads of state forming the Latin American Regional Integration Group (GIRAL) left the Argentine capital without signing the trade treaty that, according to diplomatic sources, was meant to be the most ambitious since the creation of Mercosur in 1991.

The differences between the Pacific bloc — Chile, Peru, Colombia and Mexico — and the Atlantic bloc — Argentina, Brazil, Uruguay and Paraguay — proved insurmountable on three key points: agricultural tariffs, dispute resolution mechanisms and the environmental safeguard clause proposed by Brazil.

"Integration is the destiny of this region, but today we are not ready for that destiny." — President of Brazil

The fractures between the Atlantic and the Pacific

According to three sources with access to the negotiations, the breakdown came when the Colombian representative presented an alternative text on agricultural tariffs that Brazil flatly rejected. The Pacific bloc arrived aligned with the CPTPP frameworks, which created tension with the Southern Cone countries that have very different tariff structures.

What comes next for integration?

Foreign ministers agreed to meet again in October in Mexico City. Brazil's proposal to create a technical working group was accepted, though analysts warn that presidential elections in four countries over the coming year will complicate any meaningful progress.

"We've seen this film before," said political scientist Graciela Rivas. "Every time there's a political window to move forward, short-term national interests end up winning out over the long-term strategic vision."