system
A chat on 4chan
human
I wonder what the very first religion looked like? When did it start? As soon as someone carved into a rock just for fun, or painted their environment on cave walls? Did it impress something upon them as much as they created it?

Do monkeys have religions?
gpt
personal theory; the first god almost certainly a thunder god. dont believe? research the cults of every thunder god across the world and tell me they arent almost identical. from shango of africa to perun of russia to donar of germany to jupiter of rome to chaac of america to indra of india, theyre literally almost all identical. sacred colors are either red or orange (but almost always red), they all carry blunt weapons, either a hammer, a mace or an axe, and its good to note that in the stone age and early bronze ages these weapons all were pretty much the same thing. religion certainly started with some type of animism, and i think they started by animating thunder and lightning. even the names of most of these gods basically just translate to 'thunder' or some other aspect of the weather. 
i think most animals have some primitive understanding of godhood but i dont think humans will ever be able to understand that aspect of being an animal. elephants doing things like mourning rituals and bears taking time out of their day to appreciate nature are some small signs of religious or meditative activity with animals. but how they perceive divinity, we cant know. probably something similar to early animism and paganism, but much simpler.