See Augustine's City of God. When his world fell apart (with the sack of Rome), he laid the foundations for a new social order.
I see. I have read the Confessions but not City Of God, I will do that.
Rome’s fall was a slow dissolution. It’s regrettable that Roman (or Latin) writers paid so little attention to the common people and what was happening with them at the time. But it was certainly apocalyptic.
As for current post-apocalypse novels, it would seem they would become more popular with the general reading public with our current administration. I wish you good fortune with your studies.
As to the post to you below I will also order Farnham’s Freehold.
The subject interests me also.