Slavery was at the root of what the Civil War was all about. If there had been no slavery, there would have been no war, and that ultimately what the Confederacy was fighting for was to preserve a nation based on a social system that incorporated slavery. Had that not been the case, there would have been no war. That's an issue that a lot of Southern whites today find hard to accept.

James McPherson: What They Fought For, 1861–1865 (1994)