The wealthy planter class that led the revolution absolutely wanted to not only preserve slavery, but to expand it westward. Indeed one of the main reasons they revolted was because the British had been trying to enforce treaties made with native tribes that blocked settlement west of the Appalachians, and once the war was over they started flooding over the mountains en masse, driving off the natives and establishing massive plantations worked by slave labor. The cotton gin especially contributed to this by making cotton production much more efficient and profitable, causing demand for slaves to peak and ensuring that it would not die a natural death like some optimistic moderates had been arguing.