the TRUTH is that slave-OWNERS, north & south, were "garbage", imVho. they ultimately got what they deserved =RUIN!
nonetheless, the TRUTH is that neither region CARED enough to do anything to end the slave trade, as too many powerful people/institutions, NORTH & SOUTH, we heavily invested IN the slave trade. essentially ALL of the "financial end" of 'the flesh trade" was IN the north, including shipping/leasing/transportation/purchasing/etc. MANY northern banks/financial institutions/trading companies/insurance companies/railroads/shipping companies were involved. it was ABOUT $$$$$ & nothing more than that.period. end of story.
thankfully however, slavery was DYING by 1860. the SMART people knew it;only the "willfully blind" did not know that.
the Industrial Revolution was coming to agriculture & slavery was on the threshold of being UNPROFITABLE! (slavers cared about NOTHING but profit. steam-powered engines & teams of mules/oxen/horses are CHEAPER to feed/clothe/house than slaves.) absent profit, slavery would (absent the war) have ended & soon.
my GUESS is that slavery would have died out within a generation & more likely within 5-10 years, based on my reading.
given that a LARGE portion of the MILLION dead of the WBTS were Blacks (both slave & free), ending slavery a few years earlier than it would have naturally ended,seems a REALLY high price for a few years of "status quo".
free dixie,sw