Not discouraging additional information here, but fyi, there are a few posts in this FAQ section
Also, it's worth taking a look through /r/AskAnthropology: IIRC this has come up a few times over there; search 'religio*', 'athiest*'
Sorry, we don't allow throughout history questions. These tend to produce threads which are collections of trivia, not the in-depth discussions about a particular topic we're looking for. If you have a specific question about a historical event or period or person, please feel free to re-compose your question and submit it again. Alternatively, questions of this type can be directed to more appropriate subreddits, such as /r/history or /r/askhistory.