Why was the European encounter with the Americas significant?

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Explanation:

There were many long-term consequences of the European conquest of the Americas and the global exchange that ensued. It took the Spanish only a few years to find and plunder the two wealthiest empires in the Americas. Huge silver mines found in Mexico and Peru in the mid-16th century meant that Spain instantly became the largest supplier of silver in the world. So if they never encountered this would never had happened this was the "turning point" as people say.

checks and balances are needed to keep the government running smoothly, they allow the three branches of government to overrule one another so that one branch of government does not become too powerful.