Sociopath Community

I've always enjoyed the idea of deities/concepts gaining power through collectively uniform thoughts on it, where them all spending that fraction of their energy funnels it towards the source of it as tangible power (essentially empowering both God and Satan simultaneously in a Christian structure for instance). 

I don't believe in it, but it is fun to imagine gods getting weaker as they become forgotten or rendered outdated. Some games like to handle it extremely literally, making conversion and wars actually have meta-tangible gains.