Slavery started in the North.

Blacks are a less evolved species. In 6000 years of the black african they invented not a single measurement, a written language, a calender, or even the wheel. tey have built not a single road, bridge, or ship. For shelter they have not progressed past a mud hut, a mud hut that is inferior to those of beavers, birds, and other animals. They have smaller brains, skull capacity, and their average IQ is between 75-85. Face it, there is more then just a difference in skin color.