Why did the spanish begin importing slaves from africa to work in the americas beginning in the 16th century?

American express has a long history of working for the good of all in its new york community. in 1885, it engaged its employees to raise money to build the pedestal of the statue of liberty, and today has a program to restore, preserve and revitalize historic sites in new york city. these actions by american express are partial fulfillment of the the firm has established for itself as a corporate citizen.