It wouldn't work. The technology already existed for low-level mechanized farming and factories during the Civil War. The issue is that the slave-owners were simply making too much money from the system to give it up. And no technology can really supplant a system where the slave-owner essentially puts in zero inputs. Someone who has slaves and land essentially just gets free money forever.SCRawl wrote:Couldn't we just introduce sufficiently advanced technology in, say, 1000 CE, which would (in the fullness of time) obviate the need for slavery by the 1860s? Or would that create too much risk that the US would never even exist in such a divergent timeline?
This is why factories only worked in the northern non-slave states. Chattel slavery doesn't work in a factory, because the slave-owner has to pay for the slave's food and clothing from other sources. By contrast everything a slave needs to live is produced by the plantation - food is grown on the same land as the cash crops. This is why Southern plantation owners were in fact often richer than Northern capitalists.
Any attempt to prevent the Civil War must ultimately resolve and eliminate slavery as an economic system within the United States. The root cause of the war wasn't the moral question of slavery as often portrayed, but rather the economic disruption caused by the slavery system on what was a capital-based American economy.
This is why "Bleeding Kansas" was not fought between slave owners and abolitionists as popularly claimed by many Southern revisionists. Rather, the opposition to Southern slave-owners in Kansas were from "Free Soil" supporters, who believed (correctly) that small farms would not be viable in a state that allowed rich slave plantations. New Orleans -the South's largest city - likewise pretty much surrendered without a fight for much the same reason. The population of the city consisted largely of European immigrants - among them were the founders of Budweiser - and they found the attempts by the rich slave-owners to dominate their capital-based industries (e.g. beer brewing) to be singularly tyrannical.