Some of the items mentioned below seem logical based on today's standards. There are no clear answers or answers with a 100% degree of accuracy on this question. Short term yes, long term, no possible way to be sure. With that said, some changes would be necessary for the South to decide.
If the South had become independent, their economy would have to begin building a manufacturing base. As a nation, growing and selling cotton and tobacco would lend itself to weakness. Soon enough, slavery would have become a burden. Having to care for and feed almost four million slaves would put the Southern economy at risk within 10 to 15 years in the future. No one has an answer as to what a major minority population would do in terms of economics, but, certainly the civil rights of Freedmen would continue to be abused.In the North, the farm products grown by the South would have been more costly. The westward growth of the US however would have continued and no doubt its economy would expand.
Within a few generations, Southern states could easily ask to return to the US. And, Freedmen freely allowed to emigrate to the factories of the North.
All this is speculation. No one can know with any certainty, however even some White Southerners would have emigrated North and westward.
In addition, the idea to return to the US, once the slavery question was solved, meaning the South itself would be forced to change this cruel and inefficient means of production, the South would be at risk.
Great Britain may have tried to make the South a sphere of influence. No doubt that would create a movement to rejoin the US, as slavery would be a thing of the past.
The North would have won the war in a year or two.
Their Economy Flourished.
The Civil War greatly improved the economy of the North but harmed the economy of the South.
It was a mess. The south's economy was suffering greatly. It was hard on the South that the war was in their territory and that the North was doing everything it could and using its strong economy and strong followers to win the war.
The South Lost the war, and the economy of the South was built on Slavery which came to an end as a result of the war.
The South's economy was devastated after the US Civil War. As a summary statement, for a forty year period after the Civil War, the economy of the South was stagnated, and two thirds of its wealth was destroyed.
it spilt in 2 North Korea and South Korea
The South's economy was left devastated by the Civil War. Farming was less profitable. Infrastructure such as railroads needed to be repaired. At least a fourth of working-age white men were killed during the war, which cast many families into poverty.
By destorying homes and factories in the south
it made the south lose the war
bad.
You would be pooping out of your mouth.