Think systems, folks. Think holistically. And think "modes of production." Don't worry: A little historical materialism won't turn you into a Marxist.
First off, a principle: Religious fundamentalism tends to go with societies that are impoverished (both materially and culturally) and brutalized. If you don't agree with this premise, then none of the rest of this will make sense.
OK: The South has traditionally been America's plantation. The Civil War didn't do much to change this. Indeed, it smashed the place up very badly and opened it up to further exploitation by the North. (See "carpetbagger.")
The Northeast, on the other hand, has traditionally been the nexus of trade, finance, industry, education, and culture generally. To some degree, this status is a result of geography and the history of settlement patterns.
So you have a rural, agrarian, and relatively poor culture vs. an urban, industrial, relatively rich one. (That's why the South couldn't have won, I think, unless they had smashed through and taken Washington very quickly. Even then....)
Some of this has changed with the advent of the "New South," but it is difficult to overcome several centuries of history in a couple of decades.
What we have here is a system. It's not enough to say the South is this and the North is that. I said that the South has been the North's plantation. (These days, it's an international "South," which encompasses Latin America and Asia, but the principle is similar.) So to put it bluntly, when a Northerner complains that the South is not like the North, I say: Then grow your own damn cotton, grow your own damn soybeans, pay your own workers shit wages, and dump your toxic waste in your own damn yard. Because growing up in Louisiana, I saw companies from New York and New Jersey come down and use us like that.
That place is pretty fucked, which is why I left.
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