<span>Trade was the key in developing Britain's global empire and dominance. It opened Britain up to lucrative new markets, though which it could sell its domestically produced value-added goods (especially after the beginning of the Industrial Revolution) while importing luxury and exotic goods to drive its wealthy population. Additionally, the importance of trade and the resulting need to secure trade routes drove Britain to develop the world's most powerful navy, which in term secured its global power during its era of dominance.</span>
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The Black codes were basically put in place to limit the freedom of blacks after slavery was abolished in the USA during Civil War. They were free but when they did hard labor they weren't nearly paid as much as the whites.
The Jim Crow laws enforced racial segregation in the Southern United States, locally and throughout states. They made it so it was very very hard for blacks to earn money and basically threw them out financially in every way possible.
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