They discovered the New World by accident. They were looking for new routes that would take them quicker to Asia to trade. At the time they did not know the earth was round. They believed it was flat and would sail straight to Asia. Therefore, when Colombus hit the New World he called the natives Indians because he believed he had reached India.
The protectionism adds a new kind of tax on the imports called Tariff. With the Tariff, the price of imports is increased, and becomes more expensive than locally produced products. This will protect the domestic economy.
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