Try to imagine what would have happened if the eleven states of the Confederacy had been allowed to secede peacefully from the United States in 1861.
The South has always been the problem child of the United States. I think what remained of the United States would have been better off without the South. If the United States had been able to peacefully unite with Canada the results would have been even better.
In the South slavery impeded the development of industry, and of labor saving agricultural machinery. The vast majority of whites did not own slaves. Those who did not own slaves usually had a lower standard of living than their skills would have earned for them in the North.
Negro slavery discouraged the development of a work ethic among Southern whites, because they thought hard work was something slaves did.
An additional advantage of letting the Confederacy go peacefully is that the Negroes would have remained slaves. They would not have been able to move to the North and turn downtown areas of Northern cities into crime ridden slums.
The premise of this thread is absurd and factually incorrect. The standard of living in the south was higher than the north because of the low cost of labor due to the use of slavery. They had a more bustling economy than the north. The end of slavery coupled with the destruction of infrastructure caused by the war and racial discrimination are what plummeted the south into poverty for over a century to follow.
While the southern states have had their fair share of causing problems for the union overall, today they are once again outperforming the northern states economically. The southern states have been growing while the northern states have been decaying. You only need to follow the migration patterns and the amount of wealth leaving the north for the south to see that.