Which country imported and enslaved thousand of plantations and in gold and silver mines?

What was gained through the gadsden purchase

Which of the following led to a continuation of the treatment in the excerpt above? a)the brutality of the trans-atlantic african slave trade. b)spanish repression after violent native uprisings in new spain during the 16th century. c)european competition to quickly establish colonial holdings in the new world. d)the reliance of the spanish on native americans to provide labor under the encomienda system.

The success of the civil rights movement of the 1950s largely bypassed ?