And I would not disagree with that. But the Southern secession was not through mutual agreement. They walked out without any discussions at all.
So true. Disunion was determined by the Southern states’ violent seizure of federal property independent of any discussions of political proprieties. It would have been interesting to see what happened if Jeff Davis was able to forbit Fort Sumpter from being fired on, but as was quoted about South Carolina “it is too small for a country and too big for an insane asylum”.