I'm more thinking "Long term future" than "Right away." Regarding the slavery arguments, obviously that's true. The North also had slaves, which makes this entirely irrelevant. This was about self-government, for white people. Black people didn't really factor into it on either side. Neither side really cared about the African-American. Prove to me that one side was really fighting for them, and I'll consider it. Otherwise, it was a white man's war throughout. And the Confederate position, of wanting to secede, is automatically more valid than the Union's desire to prevent them from doing so.