In post 22, you state slaves were provided "medicine". That is a stretch considering the "state of the art" in the 1700's. You also state that the descendents of slaves coult one day be king. Another reach, that simply shows, you are probably incapable of being objective here.
Secondly, Colin Powell, Condi Rice etc are prime examples of black advancements in this republic - both names have been floated for President.