I've always thought that because we were deep into the industrial revolution and nearing the second industrial revolution that slavery would have gone by the wayside with no interference from anybody. All the plantation owners would have come to the realization that they could produce a lot less expensively with all the new inventions that were coming on the market.
If there had been no slavery, all those aforesaid inventions would have come into being sooner.
If there had been no slavery, all those aforesaid inventions would have come into being sooner.