What is the purpose of religion?

Began as a way for our ancestors to try and come to terms with the universes, they came up with stories to explain what they had no way of ever being able to work out themselves. Then over time it got added to with newer stories and people began to incorporate themselves into the mythology, so as to rule with divinity and to set the rules of how they wanted their society run. The Pharaohs for example were god kings, and considering the cult leaders we've seen pop up over the years, Buddha, Zoroaster, Jesus, Muhammad and so on, then it's more than likely there were other cult leaders throughout human history which influenced different human societies and their beliefs in the time before humans started writing things down. But it's all just human made, we didn't have answers so we made up our own.