I have been expecting it since the 70s. It hasn’t happened yet, but I still expect it.
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It will be fought for cultural reasons, but won’t happen until there is economic collapse. I doubt any but the new barons will be pleased with the outcomes.
Yes, I think an economic collapse would definitely spark a civil war. Years of pent up rage will make it bloody. I just wonder what the Russians, Chinese, and others would be doing at that time?