I’m not certain on that - peaceful relations could be maintained between the split nations if there was a peaceful secession process.
I think if the South would have won, it’s quite possible due to technological and industrial advances that slavery would have been eliminated PRIOR to World War era. Subsequently and eventually, cultural similarities between the USA and CSA would have led to peace between the two nations and the allies would be joined with each other against world tyranny.
Secession may be the answer unless the federal government is put back in its rightful place by the states. I think talk of secession is healthy and reminds both the states and the federal government of their constitutional restrictions. What secession leads to or what it will look like is anybody’s guess at this point. When the federal government is bankrupt here in a few years, secession may become a moot point. The federal government simply will not have any teeth to enforce its draconian laws against the STILL UNITED states and their rediscovered sovereignty.
>>I think if the South would have won, it’s quite possible due to technological and industrial advances that slavery would have been eliminated PRIOR to World War era.<<
I strongly agree. The books I mentioned actually take the same premise.