OK, maybe you oughta sharpen up the sledgehammer so I don't get confused Lots of people have discussed humans' propensity to believe in gods and how that belief arose. My personal view is that it's more an external, cultural/societal sort of pressure than a genetic on/off switch. When we're young we don't know what's good for us, so it's natural to defer to & trust authority figures when it comes to what to eat, what's safe & unsafe, what's the right way to behave and every other aspect of life. Small children are very eager to believe what adults tell them, and don't have strong enough reasoning capacities not to anyway. It's a matter of survival to trust your parents or elders. I think the readiness to believe in gods is related to that unquestioning trust in your elders - if your parents are the ultimate power in your world and then they reveal there's an even higher power watching over the whole universe, that's going to make a very heavy impression on a child's mind (it did on mine, but iirc it wasn't my folks who told me about it). From what I've seen, most religious or formerly religious people are or were that way from childhood - I'd be very interested to see how religious numbers would be affected if parents left religious choices up to their kids when they're old enough to think about such things themselves.
As for prophets or messiahs, I'm not sure you need to find the switch for it in someone's DNA. Some people in this world are very charismatic & persuasive and have large numbers of followers and are even viewed as prophets, but it's not always a good thing - think David Koresh, Benny Hinn, head prophet of the FLDS (uber-Mormons), Reverend Jim Jones, Charles Manson. Prophets & con-men & great politicians all have the same sort of skills, it's just a question of which direction they point them in.
Hey, Sting's alright. I saw The Police earlier this year and that old bastard can still rock