Your input?
The South decide to exit the union because the north decided to stop the institution of slavery from spreading into the territories that had not yet been set up as states.
Slavery was on a slow road to extinction, but the South refused to peacefully comply with that destiny.
To say the Civil war was not about the destruction of Slavery in America is naive at best. If there had not been slavery in the south, the Southern rebellion never would have occurred. Period.