John C Calhoun was also responsible for enunciating the principle that slavery was a "positive good."

" I hold that in the present state of civilization, where two races of different origin, and distinguished by color, and other physical differences, as well as intellectual, are brought together, the relation now existing in the slaveholding States between the two, is, instead of an evil, a good—a positive good" Calhoun on the Senate floor 1837

https://oll.libertyfund.org/quote/john-calhoun-slavery-positive-good