Slavery was not “wrought” by Christopher Columbus. In the 15th century slavery was practiced in every culture and nation of the world - in particular, the Aztecs, Incas, and likely all native American tribes practiced slavery. Europeans captured by native Americans were enslaved by them. If CNN says it, you can be sure it is Fake News.
In historical terms, the muslim race has enslaved far, FAR more people than were enslaved from Africa and taken to the New World.