That is the question posed on US News opinion blog. They are responding to a book by an atheist who seems to think that we do need religion after all. The author of the opinion blog closes with questions about religious wars and maybe we would be better off.
It seems like that is the new default answer for critics in the west. War, terrorism, other "isms", all stem from religion. Therefore, why not do away with them and then there would be world peace. Of course there is little discourse on the fact that the major religions actually do preach peace. Take religion out of the world and maybe what you are left with is simply Darwinian survival of the fittest. Why not? There really is moral reason to hold back. Just a thought.