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There's two levels to consider here - setting/story and character. Story Some post-apocalyptic settings have introduced religious organisations in, either pre-apocalyptic holdouts or new cults (e...
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#4: Attribution notice removed
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/41154 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
There's two levels to consider here - setting/story and character. **Story** Some post-apocalyptic settings have introduced religious organisations in, either pre-apocalyptic holdouts or new cults (e.g. the _Fallout_ games) but if your story doesn't need them then there's nothing wrong with them not being there. Your world, your rules. **Characters** If a character's religious affiliation (either to a real world one, to one you created, or indeed an explicit "none") would affect their behavior in the story then it can be worth including and it can be effective. Jim Butcher uses this in _The Dresden Files_ series both with Harry himself and with others - because it's relevant. Gods and Angels and Demons are part of his world and the plot of the series. It would be odd for it **not** to come up. For a less fantastical setting Kathy Reichs does this with Temperance Brennan in her _Bones_ novels - the main character is non-religious but had a Catholic upbringing and occasionally this drives some of her actions so it gets mentioned - but only as much as is required to let you understand her motivation in that scene. I've read many, many books where a character's religion is simply never mentioned because it has no bearing on what's happening and what they are doing, at that point mentioning it would just feel unnecessary. > has said "Oh my God" or the like Assuming this is a post-apocalyptic version of our world then there's nothing to worry about there - the phrase is in the general vernacular of secular and religious people alike so it won't raise any particular attention to the religion question.