We might have an international border on the Ohio, and maybe a few others: perhaps New York City, California, New England, and Texas would be independent countries as well as the North and South. Maybe we'd have had a few more civil wars later on.
I doubt a Confederate victory would have "saved" the Constitution. We wouldn't have any more rights than we do now: or if "we" would, rest assured, some other "they" wouldn't.
Most likely people like us would be complaining about how those d*mn*d Confederates destroyed the "Old Republic" of 1787 and opened the way to government oppression.
had it not been for the moderating influence of dixie congress-critters (as bad as some of them were/are) over the last 200+ years, the USA would be a fascist/socialist nanny-state.
free dixie,sw
How could they 'save' something they ignored with such regularity?