Shame on whomever taught you history.
Columbus' log:
He offered to the Crowns of Europe, in exchange for financing his next expedition, "as much gold as they need, and as many slaves as they ask." In 1495 they rounded up 1500 Arawak men and put them in pens guarded by dogs, then loaded the 500 strongest into ships to Spain. 200 died en route and the remainder put up for sale by the archdeacon of the town. Columbus later wrote: "Let us in the name of the Holy Trinity go on sending all the slaves that can be sold."
When too many died in captivity, gold became the means for making good on his promises. The Arawaks throughout Hispaniola were given impossible quotas of gold they had to deliver and were maimed when they failed to meet the quotas. They fled, and were hunted and killed.
Howard Zinn:
This history has now been purged from most public school curricula in the United States.