A psychologist's take from many reviewed studies:-http://www.washingtonpost.com/posteverything/wp/2015/01/14/is-religion-a-force-for-good/-"In short, in discussing whether religion is a force for good we must be very clear what we mean by religion and what we mean by good. This rather nuanced conclusion may disappoint the polemicists, but - at least until this research field matures - a measure of restraint before we jump to conclusions about whether religion is inherently good or bad may not be such a bad thing."