GhostwriterDoF: As a Ghost, I was able to see another side, albeit just a glimpse, so I know there is more than meets the eye to existence and the definition of life. Still, you shouldn’t let being an atheist bar you from creatively exploring possibilities of an alien influence across the Universe and over our world (or your developed worlds), as you see it.
You can also use the political constructs that have taken over religion as we know it today, used for control, oppression and the targeting of undesirables to divide societies. It certainly is contemporary as people in this age are waking up to this realization.
Or you can use a more historical notion of the living religion, how important it was to discovery for our early ancestors, when science and religion was virtually the same thing.
Cultural development through centuries of observation and experimentation, of the sun and moon cycles, seasonal migrations of birds and beasts, edible and medicinal plants, eventually the coming of the harvests, their understanding was bound to the natural world that surrounded them, existing alongside the mysterious spirits believed to have helped and hindered their struggles.
After all, It’s always been the mythology, the stories, that influences cultures and sets the traditions in our non-fiction Universe...
adaliabooks: Yeah, they are all good points. Right now I kind of see the gods and religion side of it being a bit like you describe but it's the nuts and bolts of spirits and afterlife and there interaction with magic that I struggle with a bit.
Particularly as my god like races have been driven from the world in my mythology, but I want them to be able to come back. Which would suggest some kind of re-incarnation or travel between realms, but I don't particularly want the mortal races to reincarnate (not as a rule anyway). It's also possible to inter breed between humans and gods and between the various mortal races (elves, humans, dwarves) and I struggle with how that works with souls... is a demi god a human soul or a gods soul? Or something else? Are all souls the same, and if they are why can the gods come back but regular mortals can't?
So I struggle with a system that reconciles everything I want it to do while making any kind of sense XD
But I think I'm almost there...
First thought - looking at each organism, whether human or not, being a small thread, interconnected and woven into the larger, overall thread of energy that keeps everything going.
A person's thread frays, they die. No coming back. For gods, possibly strands that connect them to points that mortal races can't.
How did the gods go away? Most of their threads were cut, maybe to the point that they couldn't actively interact with the mortal world, but still bound sufficiently to still exist in some state that no living mortal could.
How does a demi-god work? Well, you get two mortals together, they reproduce, you get a new mortal thread.
A god and a mortal reproduce, you get a reinforced thread. Stronger the thread, the closer to divinity you are.
The tricky part would be how exactly the gods went away and what they have to do to come back.
First thought - someone managed to find a way to unbind the threads and did so. Why they did it? Who knows. Maybe the gods were complacent, omnipotent assholes that needed a good comeuppance so they'd stop abusing the world with their power. Or something. That's up to you to decide.
But anyway, as for how the gods come back? Well, they might have to sacrifice part of their own essence, losing connection with some things and redirecting the threads to essentially reattach themselves to the world.
Or maybe, mournful followers develop a way to ritually sacrifice themselves in order to give over their threads to their god, allowing the god to rebind themselves at the cost of their own existences.