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I think it's unusual that there would be no religion post-apocalypse. Surely some people would become more religious given massive social upheaval. I think it's fine if your main characters aren'...
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/41172 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
I think it's unusual that there would be no religion post-apocalypse. Surely some people would become _more_ religious given massive social upheaval. I think it's fine if your main characters aren't those people, but the more characters you introduce the more it strains believability. The more people you have, the less able you are to explain a group's absence by it just being a statistical fluke.