> it doesn't matter if a religion is actually true, as long as you can build a sustaining civilization with it. it actually does though, the main reason christianity began to decline in the west was because the claims about the nature of reality etc it made began to clash so heavily with the growing amount of scientific knowledge europeans were accumulating, and the religious world view, at least one that took biblical stories literally, being incapable of dealing with the worldview proposed by scientific knowledge. simply put, people became less and less inclined to believe in magical stuff when our understanding of reality improved and christianity hinged itself heavily on the magical stuff being actually true. for a lot of people believing something isn't some matter of "faith" it is about what seems most reasonable explanation for stuff and with the spread of scientific knowledge and mindset of evidence being needed to believe in something, christian explanations of things became more and more untanable to people, at least when taken literally.  still, there are still plenty of "christians" to whom the religions is basically just about the morals and everything supernatural is just metaphor and what not but i dunno if you can really call a person who doesn't really believe in supernatural stuff like the ressurection of christ etc a christian.
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