Religion

The oldest religions we know about were non-theistic as were many isolated tribes, not to mention that prior to about 10,000 yrs ago there's no reason to believe theism existed at all. When you consider humans have been around for at least 300,000 years, 10,000 is a blip on our existence. Then you can go back another 200-300 million years to the origin of sentience, there's also exactly zero evidence of theism.

Nobody is born with knowledge or instinct to invent theism. We are all born as atheists. That is the default condition. Anyone who claims otherwise is simply injecting "faith" into their own manufactured reality and when you ask them for proof of their assertion you get the same response as when you ask for proof of their theistic god that allegedly watches them masturbate and decides whether they deserve eternal reward or punishment.

The reason why organized religion was created at the same time civilizations were created isn't just coincidence. It's because religion is a very effective means of controlling large populations.