So the southern states did not see the owning of slaves to be their right to determine or not determine to continue? You can look at this way too, the north did not go to battle in order to end slavery. If the north had routed the rebels at Bull Run, the war probably would have been over in 1861, but slavery would have still continued.
Had the southern states not seceded at all slavery would have likely continued for a while longer.
Had they stopped and signed onto the Corwin Amendment we could have seen slavery for a very long time in the South as it's extremely difficult to rid yourself of a constitutional amendment like that.