Even though slavery was abolished, that did not mean the white people would stop treating the black people with a lack of respect. Thus lead to segregation some years later, and then resulted in the civil right movement.
They reduce the time (by making it faster) and reduce the cost of trading (by making it efficient).
For his work on the Missouri Compromise, Senator Henry Clay became known as the “Great Pacificator." ... It was repealed by the Kansas-Nebraska Act of 1854, which established popular sovereignty (local choice) regarding slavery in Kansas and Nebraska, though both were north of the compromise line.
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Langston Hughes was called the Shakespeare of Harlem
