It is worth noting that even the worst disaster in human history, while sometimes toppling empires, failed to really destroy communities within less than a couple of generations. And after more than one generation a community changed, or migrated, more than it was destroyed.
The plague didn't do it Europe. All the earth quakes and other natural disasters didn't do it long term (immediate effects are catastrphic so). Famines come close, and even then communities rebuild and survive. I have yet to see a real world example of a Walking Dead like scenario. The dinosaurs and the asteroid maybe, but those dinosaurs left so little documebtation, it's a shame.
The plague didn't do it Europe. All the earth quakes and other natural disasters didn't do it long term (immediate effects are catastrphic so). Famines come close, and even then communities rebuild and survive. I have yet to see a real world example of a Walking Dead like scenario. The dinosaurs and the asteroid maybe, but those dinosaurs left so little documebtation, it's a shame.