I'm researching on the common trait of mostly every religion coming from pre-humanist times, and that would be, the notion of "revelation", that is, that at the beginning of every [I say this with caution because I'm admitting to exceptions] religion there is some sort of "revelation" from supernatural being(s) of some sort.
My question is: Do you know of any example of religions from the past that you can confidently say that were exempt from "revelation", or "enlightenment from a supernatural origin" or "mystical connection with a supernatural world"? This is not the same as asking if there were religions without gods, or religions of nature. I'm not even considering what I understand as philosophical-ethical systems, such as confucionism or platonism. My purpose is to find out if, at the starting point of all religions of the past, there is a "revelation", or merely "observation / contemplation".
Not sure if I made myself clear, but, in any case, please let's think together.
Eden