" Significantly, in a movement that all declared to be predicated on the sovereignty of the states, the one area in which now and again in the future they would deny state sovereignty would be slavery. To theold Union they had said that Federal power had no authority to interfere with slavery issues in a state. To their new nation they would declare that the state had no power to interfere with a federal protection of slavery. Of all the many testimonials to the fact that slavery, and not state rights, really lay at the heart of their movement, this was the most eloquent of all. "

― , Look Away!: A History of the Confederate States of America