I recommend a dark short story titled "Diner" from Perpetuity Blues and other stories by Neal Barrett, Jr.
It really tempers my thinking on these things.
It's a disturbing prevision of a post-nuclear Southeast Texas fishing community, occupied by Chinese communist peacekeepers. Think of a day when illegal mexicans are the least of your worries, and hell, your trading partners for food.
The way I look at it, the USA doesn't actually exist anymore. We are living the beginning of the post-Constitutional period. Last true demonstration of the Constitution was BillJeff's impeachment.