But that mass migration, along with their self directed culture, those things were the difference.The South was allowed to create its own nation after the war by skirting the Constitution and making its own laws to re-establish slavery. It was even better - didn't have to take care of the slave. It was a brutal extension of what happens when you try to stop being the bottom rail they need you to be. The freedmen and their descendants succeeded amazingly in all areas, there was a renaissance in art, music, literature - in short, everything that had been taught about the African to justify slavery was wrong. So...step on it! The huge error made was the US did not occupy the South longer, and stick their nose in their business longer. The Federal government did not make sure the amendments the rebel states had agreed to were being followed - apparently they had their fingers crossed behind their backs. They were not stopped from doing a sneak-around, and things in the South were so bad there was a mass migration out of there. And it got even worse. It took another hundred years to do what the CW did not do - ensure freedom for all citizens. Slavery by other names was the result of this failure.
South African apartheid didn't start until after WW2 and lasted over 50 years, into the 1990s, in the face of widespread international censure.Jim Crow was not chattel slavery. And the south was then reunited with the US and reunited with its Democratic allies in the north. So I disagree that the apartheid regime is relevant evidence.