I would say the South has suffered from losing that war and 75% of Southern wealth until this day. After Jim Crow was finally, at long last lifted, and the South started using our entire population, instead of using 55% to hold down 45%, the South started to prosper but we still are low on the numbers we should be high on, like college graduates. and high on numbers we should be low on, like poverty rates, high school drop-out rates, etc.
Actually it was not the war that caused this, it was slavery itself. There was no capacity to absorb several million poor, uneducated people into our system.