Well as fun as it to speculate about what ifs: to think that the War wouldn't have happened and everyone would have gotten along peacable is obviously not something that had a chance, both sides depsite any attempts to the otherwise by some individuals who were few and far between did indeed go to war over and becuase of the main issue that divided them.

Additonally... I think the decendents of those who were slaves (not to mention their ancestors who were in fact enslaved whose effort to have their freedom eventually did pay off) would naturally be appalled that people are still around today who would suggest that the people who were enslaving them should have been allowed to blithely continue to do so.