Why European decided to used African as slaves
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European traders wanted to trade for gold, which could be found in western Africa, and also to find a maritime route to "the Indies" (India), where they could trade for luxury goods such as spices without having to obtain these items from Middle Eastern Islamic traders.

it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.

paper money known as continental currency, or continentals.