There will always be Billy Sundays among us. Smooth, snake-tongued preachers talking up either the gospel of prosperity that creates prosperity mostly for themselves, or else painting pictures of heavenly hereafters with which their impoverished followers will be rewarded—provided they dig deep for what is in their meagerly endowed pockets to sustain the preacher’s enterprise. The historical Billy Sunday was the latter, a ragingly successful turn-of-the-20th century evangelist who wowed crowds with theatrical religious oratory that he embellished with long slides across or dives off the stage, stunts that called upon his former career as a major league baseball player…