He [Michael McCullough] and a fellow psychologist at the University of Miami, Brian Willoughby, have reviewed eight decades of research and concluded that religious belief and piety promote self-control.
This sounded to me uncomfortably similar to the conclusion of the nuns who taught me in grade school, but Dr. McCullough has not evangelical motives. He confesses to not being much of a devotee himself. “When it comes to religion,” he said, “professionally, I’m a fan, but personally, I don’t get down on the field much.”
His professional interest arose from a desire to understand why religion evolved and why it seems to help so many people. Researchers around the world have repeatedly found that devoutly religious people tend to do better in school, live longer, have more satisfying marriages and be generally happier.