Snake-handlers and faith-healers, tent meetings and river baptisms, impoverished country churches and imposing city edifices all are elements of that segment of American protestanism known as the "minor sects." These religions--Church of Christ, Assembly of God, Free Will Baptist, Cumberland Presbyterian, and the many Holiness and Pentecostal churches, among other lesser-known bodies--make up a significant majoirty among the more than 67 million United...