What is the major difference between slavery prior to European colonialization & slavery after?

Much of the post-world war i economic boom was due to the federal government's policy of

What was the importance of the sepoy mutiny?

In order to get a consensus between anti-federalists and federalist to be able to forward on the constitution, james madison advocated for a bill of rights. what was the purpose of the bill of rights for citizens of the united states?