Sadly, the only way I can imagine to obtain experimental confirmation of this hypothesis would be unworkable.
It would be necessary to take a population of infants, raise them in strict isolation and teach them nothing of religion, carefully excluding anything that even hints at the concept, while giving them the scientific method and lots of understanding of reality otherwise. Then allow them to develop their own civilization and monitor them for several centuries to see if the concept ever emerges.
I always figured that religion arose from the natural inclination of the human brain to look for order in chaos (and it’s then exploited by those with power as a means of controlling people). Since there will always be circumstances outside our control, I would expect people to at the very least have superstitions, if not full-blown religion, no matter how much scientific knowledge they have. Until the fundamental nature of the human brain changes, at least.
What other guy said, there could be biological predisposition to religion. Many experts believe that it is a natural anti-depressant.
This is pure conjecture, but to me religion has always felt like an extension of parentage and hierarchy. You start off with your parents as your “ultimate superiors” (they decide for you, teach you etc.). At some point you learn that they are also part of a similar framework, with society and the state as their “ultimate superiors”. Gods and so on would then be the next step, the superior to all superiors.
This would explain the “natural anti-depressant” - an intact family gives us feelings of safety, protection, and other positive things. An intact society does the same. It seems logical that religion would do the same on an even larger level.
Does anyone know of counter-examples? E.g. religions with gods viewed as below the individual, or religions that don’t claim to be the framework in which everything else lives?
Religion doesn’t just provide social safety net which elicits comfort; on the personal level, the act of praying and meditating provides some comfort to the individual.