How did the opening of Buenos Aires to transatlantic trade change the region’s economy?

The opening of Buenos Aires to transatlantic trade in the late 18th century fundamentally reoriented Argentina’s economy from the west to the east, shifting focus away from the declining silver mines of the Viceroyalty of Peru toward direct maritime commerce with Europe.1

This transformation, facilitated by the creation of the Viceroyalty of the Río de la Plata in 1776, had several key impacts:

• Shift in Trade Routes: Buenos Aires began competing with the traditional, cumbersome route through Panama and Peru. This allowed for more efficient importation of European goods and the export of silver from the Potosí mining region, which was incorporated into the new viceroyalty.2
• Economic Growth and Urbanization: The city experienced explosive population growth and became a thriving commercial hub. It evolved into an administrative center, gaining institutions similar to those in Lima or Mexico City.32
• Divergence of Elite Interests: The administrative reforms split the local elite into two groups: one focused on international pastoral activities and trade with regions like Brazil and Great Britain, and another tied to official viceregal bodies and regional economic control.3
• Increased Commercial Activity: The liberalization of trade led to a significant rise in both legal commerce and smuggling, cementing the port's role as the primary gateway for the region's wealth.12