I believe we're watching the USA collapse as you describe, and that despite much wider coverage our understanding of its collapse will, too, be more about the beholder.
I'm in a very blue state, but the rural population (30% maybe) is a different world of wealth, education, politics, population density. We subsidize their economy by building infrastructure there they can't afford (like roads and bridges). This causes endless arguing at the state level. I think a lot of the states are like this with varying % in the two groups.
Probably better to invest in land in places with a (relatively) stable climate, good fresh water supply, and far enough north and high enough in elevation to be protected from the most obvious effects of climate change.