Global silver trade from the 16th to 18th centuries which China desired, so they traded silver to make up for their trade deficit. The two most important mining colonies of the Spanish Empire were Peru and Mexico, who were estimated to have provided one-hundred thousand tons of silver from the mid 16th Century to the end of the colonial period. The richest, and most productive mine in the Americas was that of Potosí in what is modern day Bolivia. The richest camp in Mexico was in the city of Zacatecas, however the production of this mine was far less than that of Potosi. More simplistic native mining techniques dominated
History of education institutions seem to be common to the Nahua people, leading some experts to suggest that they are older than the Aztec culture. Aztec teachers ("tlatimine") propounded a spartan regime of education with the purpose of forming a stoical people. Girls were educated in the crafts of home and child raising. They were not taught to read or write. All women were taught to be involved in religion; there are paintings of women presiding over religious ceremonies, but there are no references to female priests. Inca education during the time of the Inca Empire in the 15th and 16th centuries was