Somewhere in the tiny bowels of a pin drive floating around on my so-called desk is a file of quotes, mostly from founder types, of why our consitution will only work with a religious population. Why religious values are the foundation of a peaceful civilization, etc. Exactly what Barr recently said at Notre Dame.
Any society/government based on atheism will immediately, and invariably, devolve to dog eat dog of the very worst kind of barbarity.