If you think that the names and current national boundaries and territories will go unchanged amid climate and biological armageddon, you're in for a rude awakening. The US funded coups for bananas. Imagine what they will do for lumber or meat or oil as things collapse? China has been genociding in and around their borders for years. Russia is 2 years into invading Eastern Europe because of a small penis leader---these are superpowers in stable times.

There is a reason post apocalyptic movies are generally attempt to be jarring...it's ALL going away.