Suddenly when the south started trying to industrialize it became the biggest reason.

Fucking what.

"Economic factors"

It's always an interesting question when you raise the issue of what the South's entire economy was dependent on.

Unfortunately, many claim nonsense like "It was about states' rights!"

Not even that. The first paragraph of each letter of secession say unequivocally that it's about slavery. Most don't even mention states rights.

They had so many options, and still they went with being racist losers. Smh.

West Virginia isn't really thought of as being the nicest of states, but they were the only state created explicitly to combat slavery - so that's pretty cool.

Oklahoma has its panhandle due to slavery. It used to be part of Texas but Texas gave it up rather then give up slavery.

They had two civil wars over it. First when México outlawed it and again when the USA did.

Oh, say what is it called when someone is forced to work against their will for no money? I know there's a word for it...

The Southern Aristocracy was very much operating on a pre-capitalist economy, with a system of pseudo-feudalism predominating in the slave economy. If the US Civil War was about capitalism, the northern industrialists, who benefitted from the Southern feudal economy keeping costs low, would have supported the South's war for slavery, not the North's attempts to end it.