Exactly what the title says. I figure this is a different question than what is normally asked about the Civil War.
There's obviously two different options to speculate about.
Option A) The United States is able to prevent any and all secession from occurring. CSA never comes into existence.
Option B) CSA is able to peacefully secede from the Union.
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I'm actually quite curious as to what the members of this forum think about either of the two possibilities, and effects this would have on the world.
Beyond the obvious things, like people living who would have died or certain states avoiding economic damage.
So yeah.