I don't think you are using the word "dichotomy" correctly. It does seem to be a favorite though. Like any other religion, there will be many denominations. Most of the Atheists I have discussed religion with are sold on the whole magic big bang theory, and evolution of species from simple single cell organisms, which themselves are amazingly complex, to mammals, reptiles etc. If that is not how you explain the origins of the human condition, do you have an alternate theory? What convinced you.