Why did korea choose to isolate itself in the 1500's?

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

What did the u. s. want to build on the land acquired through the gadsden purchase?

Capitalism competed with dominance in the twentieth century communism merchantilism free enterprise feudalism