Yes, slavery is America's original sin. Who could have imagined that bringing uncivilized, unassimilable people to live in your midst could be a negative? /sarc
After the rebellion in Haiti, we should have got wise and deported every slave of color. But no, people were too greedy and short-sighted.
Slavery was worse for the owners than it was the slaves and almost everything that's wrong with America politically can be traced to slavery and our failure to deport them.