Our brains evolved when the world was very different – when people were nomadic hunter-gatherers, living in tribal communities.
Modern humans (homo sapiens) appeared about 200,000 years ago - that’s pretty recent, in the grand scheme of things. But it’s still a long time.
So you’d think we’d have this whole anxiety thing figured out by now, hey?
But evolution is (usually) very slow and gradual. Our society in general (and our technology in particular), has evolved very quickly.
Much faster than our brains can evolve!