In practice, the question posed here is probably not answerable with certainty because a genuine experimental test of the question is impossible. For both pragmatic and ethical reasons, we could never randomly assign individuals to a condition in which they were raised in a religious environment and randomly assign others to be raised in a nonreligious environment, all the while ensuring that all participants in this fanciful Gedanken experiment experienced little or no contact with the contrasting worldview. Putting it differently, we will almost certainly never know the hypothetical counterfactual (Dawes 1994) to the question posed at the article’s outset; by “hypothetical counterfactual,” we mean the outcome that would have resulted had the world, or a large chunk of it, never been exposed to religion. That is not to say, however, that circumstantial scientific data cannot inform the question or adjust a rational individual’s assignment of probability to its answer.
That's true, a really scientific answer would take some doing. I can hardly speculate what humans would be like had it not occurred (Or what we would be like in the future never knowing about it). I should of made the questions "Do we *Still* need religion" because of course religion has played a tremendous role in our evolution.
But do we Still need is what I was really wondering.