When I first read Laurence Iannaccone’s “Why Strict Churches Are Strong” (PDF alert), I was quite enamored with it. I guess I don’t know why I haven’t written a post on it (or maybe I have, but can’t find it). Anyway, I was reading an article from the St. Louis Today that referenced this research.
Iannaccone compared churches along a continuum of strictness, which he sometimes calls “distinctiveness,” and which includes among other items dietary guidelines, dress and grooming practices, time commitments, and standards of sexual morality. The result of these distinctive membership requirements is that members tend to orient their lives fully around the institution, sometimes crowding out other pursuits and relationships. For the Jehovah’s Witnesses, this separation is a direct goal: the young Witness in my home explained how his family socialized primarily with other Witnesses and avoided interreligious activities. For Mormons, the separation is an indirect effect: we’re strongly encouraged to make personal connections in our neighborhoods, and many of us do, but our distinctive way of life and the time we devote to serving in the church mean that often—not always—our social lives center mostly around our ward, or congregation.
What Iannaccone found was that the strictness of a church correlated positively with increased commitment, greater contributions of resources and time, and closer ties to the group. The strict behavioral guidelines yielded higher benefits to members. To understand why this is so, consider how much of a person’s experience at church depends on what others bring to the board: friendly greetings, musical gifts, excellent teaching, social support, solidarity, enthusiasm, love. Strict behavioral requirements have the effect of retaining only the members who are most committed, most enthusiastic, most engaged. Those who choose to participate fully reap the rewards of a vibrant community life.
Of course, the author disagrees with one area:


