We all know the differences, how the American south was the more backwards place and how the country would be better if they dissapared (sarcasm from my part, of course).
But, how would be a world where the American South is the more racially tolerant place and the North is the one see as a racist horror.
A POD after the Civil War would be interesting. I know the factors such as urbanization in the North, but I want to see what could have been.