In 1821, an independent Mexico, developing a national conscience and abundant enthusiasm, planned to declare its independence economically and socially as well as in political affairs. Unfortunately, many prominent Mexicans were unable to realize that their new nation could escape neither the Spanish past nor its Mexican present.

Mercantilism had been the prime characteristic of colonial commerce. During the colonial period, only two Mexican ports were provided for importation and exportation. These were Vera Cruz, for Atlantic trade, and Acapulco, for the Manila shipments. The whole export-import commerce of the New World was forced to pass through Spain's ports of Cádiz and Seville, and only in Spanish ships. Licensed vessels embarked at certain prescribed periods when they traveled with a convoy.