The greatest trick religion did was convince the world god is real.
That be silly and debunked, it's been scientifically proven of course that people are born theists, and merely have to be indoctrinated into being atheists.
This be because atheism be lower stage of human development than theism, much as being a dog is lower in theory of evolution than being human - so obviously a sane person could not be an atheist unless they were afflicted with some type of mental, or moral disease.
Most likely is also reason that we see atheists such as Sade who support evils such as pedophilia, rape, and bestiality - since atheism obviously just another symptom of mental and moral disease to begin with.