He met the paradox of what he knew should be (end of slavery) and how to maintain his estate and the economy of the south (keeping slavery). The solution came when the cotton gin (engine) was created, that lessended the need for slaves in the cotton growning areas. It was industrialization that permitted the eradication of slavery due to what were seen as economic requirements/justifications.
It didn't end slavery. It just made the work a lot easier!
Pull a few levers every couple of years. Massa will provide the rest.
My friend, the invention of the cotton gin did just the opposite of what you claim. Before the gin, the only cotton that could be profitably grown was the long fiber or 'low-land' variety. It was not a major crop because it was very geographically limited.
With the gin, the short fiber or 'upland' variety could be profitably grown spreading cotton production all the way from Georgia to Texas and as far north as Missouri and Tennessee. It infinitely increased the demand for slaves to plow, plant, how and pick cotton and the price of slaves sky rocked to the point that in 1860, slaves were the most valuable property in the nation -- more valuable than all the railroads and factories in the notion combined.