Do you know who created slavery?:
Its as old as known history. The earliest civilations practiced it back even in Mesopotamia (which is older than Egypt). It was not created by the "white devil" that you hear about today. 

I do wonder how many blacks in America would be willing to go back in time and stop the importation of their ancestors...Hmmm, Africa has aids, drought, pestilence, civil wars, ethnic genocide, and no economy. America sounds pretty good after all!