Actually I don't know, and neither do they, but they have their theories.

That is one of the things I like about your worldbuilding; the theology and metaphysics of the inhabitants are as muddled and messy as that in the real world.

That's a good, comprehensive-looking review, btw. I didn't see anything obviously missing.

Good! There's still this voice at the back of my brain that whispers that I've forgotten something but I will now quote you at it to shut it up... 8-)

BTW, what is that spider in your icon?