Because nebraska specializes in the production of corn and maine specializes in the production of lobsters, the two states could engage in trade that benefits both parties. this law of economics is known as

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

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