And by the way, have you turned in your SUV yet? Your smoking materials? Have you installed all of the alternative power systems yet also and block off your property as a wetland?
The south, like the North, already owned slaves. That's not what the fight was about.
The North was so in favor of owning slaves, they kept theirs after those in the South were free.
The right to withdraw from the Union, I believe was one.
To look at this in futuristic terms:
Let's say a few years from now when the growing international economy has all but dissolved nationhood, the United Nations votes that all members should abolish the death penalty.
Then let's say America says to heck with that, I'm outta here.
Then the United Nations says, "You can't leave!" and begins assembling a blue-helmeted army to invade America.
What then would you be fighting for: the death penalty or the right to remain a sovereign state?