What do you think of religions?

Not sure, I believe in evolution, so using that as a framework, isn't there an evolutionary benefit to a large group of people believing in the same thing?

Having a unified "sense of truth"(not actual truth), or meaning could be a strong reason why people in the past made it this far, and allowed people to trust and work together.
Because if your society/village trusted each other more than another village, then you're probably more likely to survive.

On the other side there are problems with belief system because even if you do survive it doesn't mean you'll enjoy surviving in a world with weird rules that don't make sense.
You could say we know too much now, so having an old belief systems might not work, because people can't live with beliefs that conflict with are new found knowledge.
If that's the case then we're in a transition period on finding new meaning/belief that gets along with our knowledge. But there is a danger in falling into a new belief system... the new belief system might be wrong, because having knowledge doesn't mean we know how to act, example having too much information makes it very difficult to make a decision.
So some of us might make the wrong decisions. How to fix this might be setting up a situation where we can make mistakes without ruining peoples lives, and then benefit from the people who stumble on the right thing. Kinda sounds like how evolution works except it would be nice to let are ideas die instead of us.

Hmm, I might be ranting too much lol so I'll stop here.