Long-Term Social Effects of an Earlier Abolition of American Slavery

So working off of this idea (it may or may not be plausible): If the 1784 Land Ordinance, banning slavery in new US territories, passes it somewhat likely means that states like Kentucky, and Tennessee (along with Louisiana, Arkansas, Missouri etc.) enter into the Union as free states. This means the south is simply outgunned in both the senate and the house, and there’s the writing on the wall by the 1820s that slavery is going to die out. With that, Virginia, Delaware, and Maryland begin gradual emancipation so likely no Nat Turner Rebellion in 1831. Then let’s say around 1836, Congress passed a motion to gradually emancipate the rest of the slaves, the south just not having the sheer votes to really do anything.

Obviously that’s a bit ask, and it can be tweaked some for sure. But with an 1830s or even early 1840s abolition, what would the long-term effects be in the United States. How would racial relations and civil rights develop in such a timeline. Also, how might the parties develop without the issue of slavery at the forefront for the next two decades?
 

Ficboy

Banned
There's a timeline called A More Perfect Union: An Alternate History of the Land of the Free by @HeX that focuses on an earlier abolition of slavery through peaceful means thanks to the deleted passage related to slavery being put in the Declaration of Independence and Alexander Hamilton becoming President in 1808 thus leading to the peculiar institution being abolished earlier in 1839 but there is still a civil war over civil rights and other things. It's also got an Expanded Universe as well.
 
I have a timeline, Jefferson's Anti-Slavery Crisis (link below) where an earlier abolition of slavery happens due to, once again, a deleted passage related to slavery in the Declaration of Independence being inserted, at the cost of GA, SC, NC leaving the United States of America. And yes, slavery is ended earlier in the US (in 1836 to be precise)
 
So working off of this idea (it may or may not be plausible): If the 1784 Land Ordinance, banning slavery in new US territories, passes it somewhat likely means that states like Kentucky, and Tennessee (along with Louisiana, Arkansas, Missouri etc.) enter into the Union as free states. This means the south is simply outgunned in both the senate and the house, and there’s the writing on the wall by the 1820s that slavery is going to die out. With that, Virginia, Delaware, and Maryland begin gradual emancipation so likely no Nat Turner Rebellion in 1831. Then let’s say around 1836, Congress passed a motion to gradually emancipate the rest of the slaves, the south just not having the sheer votes to really do anything.

Obviously that’s a bit ask, and it can be tweaked some for sure. But with an 1830s or even early 1840s abolition, what would the long-term effects be in the United States. How would racial relations and civil rights develop in such a timeline. Also, how might the parties develop without the issue of slavery at the forefront for the next two decades?
Would that just lead to Civil War much earlier? (The writing on the wall that slavery is going to die out meaning that fire eaters will emerge concerning secession, but the Federal Government will respond "heck no" and risk civil war to preserve the Union?)
 
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