Dizzying changes have taken place in American religious life in the last half century. Yet in spite of that fact, taking a snapshot of a "typical" Christian church in America would reveal a surprising number of small-to-mid-sized congregations, rooted in a local neighborhood or community, tied to a specific denomination, where most of the members know each others' names, and hence are blessed (and cursed) with being the church together. In this clear-eyed,...