The new constitution has put at rest, forever, all the agitating questions relating to our peculiar institution — African slavery as it exists amongst us — the proper status of the negro in our form of civilization. This was the immediate cause of the late rupture and present revolution. […] The prevailing ideas entertained by [Jefferson] and most of the leading statesmen at the time of the formation of the old constitution, were that the enslavement of the African was in violation of the laws of nature; that it was wrong in principle, socially, morally, and politically. It was an evil they knew not well how to deal with, but the general opinion of the men of that day was that, somehow or other in the order of Providence, the institution would be evanescent and pass away. […] Our new government is founded upon exactly the opposite idea; its foundations are laid, its corner-stone rests upon the great truth, that the negro is not equal to the white man; that slavery — subordination to the superior race — is his natural and normal condition. This, our new government, is the first, in the history of the world, based upon this great physical, philosophical, and moral truth.

Alexander Stephens (1812-1883) American lawyer, politician, Confederate States Vice-President (1861-65)
“Cornerstone Speech,” Savannah (21 Mar 1861)
    (Source)

On the foundation of the government of the Confederate States of America.