This is more a question for the atheists, non theists, etc.
If we work on the assumption that there are no deities or so called supernatural elements to life as we know it...where did it come from? Where does the concept and/or the idea of the mystical and divine originate from? Imagination? Doesnt imagination in a way just come up with ideas that are already suggested in some way in the mind?
Hypethetically if we go back to the beginning of when there is no religion, no concept of beings that you cannot see...wouldnt the first person to announce such an idea be ridiculed and shut down straight away?
We have a tendency to err on type I errors (false positive inferences) rather than type II errors (false negative inferences).
Type I and type II errors - Wikipedia, the free encyclopedia
There are good reasons for this. Typically, the cost of false positives is less than the cost of false negatives: if you're drinking from a stream and hear a rustle in the bushes, it could be the wind, but it could be a predator. If you assume it's a predator and you're wrong, you lose an opportunity to drink water for a few minutes. If you assume it's not a predator and you're wrong, you're lunch.
We also have a built-in tendency to infer agency and purpose in inanimate things. There are probably also good evolutionary reasons for this, too: the cost of assuming that an unintelligent threat can actually respond to your actions is low compared to the cost of assuming that an intelligent, thinking threat won't respond to your actions.
We can see this last tendency in small children. I heard a podcast about this topic a while back, and the psychologist they interviewed gave an example involving his own young daughter: while they were hiking, he pointed to a large, jagged rock and asked her why she thought it was pointy. After a minute's thought, she said "so bears won't sit on it." Her default was to assume that there was some sort of intended purpose or design behind the rock being the way it is.
So... we have a tendency to:
- assume that things exist when they really don't
- assume that there's agency and deliberate purpose in the world when there really isn't.
This gets us pretty close to full-fledged religion as it is. When you add into the mix the effect of "prophets", "oracles", or other people who - under the influence of psychiatric conditions, substances, extreme conditions, or other things - claim to have special insight into the "beyond" or the "divine", I don't think it's hard to see how religion might emerge.