Bacon Bits
Legend
I would say that in most campaign settings, atheism would be regarded as irrational or uneducated at best, delusional or outright insane at worst.
The basic problem is that it's very easy to find someone who can contact and travel to other planes. Not because you can contact deities, but because of everything else you can contact. You can contact sentient, eternal, immortal elemental forces. Not just forces of earth, fire, water. Not just forces of positive and negative energy. But sentient, eternal, immortal forces of morality. This is a universe where you can contact a sentient entity of elemental good, or elemental truth. These forces are not deities, but they will -- if they are trustworthy, which is magically discernible -- confirm that deities are real deities. They get their power from their worshippers, judge them and look over them in the afterlife (which is trivially provable), and are granted dominion over a domain of reality. And every tool, artifact, magic item, or magic spell you can conceivably invent or find will -- again, if trustworthy, which is magically discernible -- agree that deities are real deities.
Thus, any theory of deities being mere demiurges will be demonstrably, provably false. D&D is a universe where the existence of deities is not only falsifiable, it is 100% verifiable. A character will be forced to find either literally everything in the universe is lying to you -- i.e., a delusional psychosis -- or would be forced to admit that deities must exist because every trustworthy source of information would agree that deities are deities. Because based on whatever definition that campaign setting uses for a deity, they actually are.
Asking someone to prove the existence of deities is like asking someone to prove the existence of exoplanets. It's not easy. It requires a lot of study. But it can definitely be done, and no civilization would exist that didn't not agree on that universal fact of existence in that universe.
In the D&D universe, only the ignorant and the insane are atheists.
The basic problem is that it's very easy to find someone who can contact and travel to other planes. Not because you can contact deities, but because of everything else you can contact. You can contact sentient, eternal, immortal elemental forces. Not just forces of earth, fire, water. Not just forces of positive and negative energy. But sentient, eternal, immortal forces of morality. This is a universe where you can contact a sentient entity of elemental good, or elemental truth. These forces are not deities, but they will -- if they are trustworthy, which is magically discernible -- confirm that deities are real deities. They get their power from their worshippers, judge them and look over them in the afterlife (which is trivially provable), and are granted dominion over a domain of reality. And every tool, artifact, magic item, or magic spell you can conceivably invent or find will -- again, if trustworthy, which is magically discernible -- agree that deities are real deities.
Thus, any theory of deities being mere demiurges will be demonstrably, provably false. D&D is a universe where the existence of deities is not only falsifiable, it is 100% verifiable. A character will be forced to find either literally everything in the universe is lying to you -- i.e., a delusional psychosis -- or would be forced to admit that deities must exist because every trustworthy source of information would agree that deities are deities. Because based on whatever definition that campaign setting uses for a deity, they actually are.
Asking someone to prove the existence of deities is like asking someone to prove the existence of exoplanets. It's not easy. It requires a lot of study. But it can definitely be done, and no civilization would exist that didn't not agree on that universal fact of existence in that universe.
In the D&D universe, only the ignorant and the insane are atheists.