I think yes, the concept would still arise. Many disconnected societies had religion. You know this feeling when, after stumbling and falling over a chair, you

I think yes, the concept would still arise. Many disconnected societies had religion. You know this feeling when, after stumbling and falling over a chair, you punish the poor piece of furniture as if it were alive? Or see a car crash about to occur and think to yourself, oh please, let's this not happen? Imagining self-consciousness around you, a natural human trait, leads to the invention of tree spirits, thunderstorm spirits, etc., all the way up to god. And of course the concept of god (or any other Powerful Force orthogonal to human well-being) is very beneficial to those in power, to rationalize their decisions to the masses. So yes, it would be invented, and pretty soon.