The simple question "What would Jesus do?"—often abbreviated to the initials "WWJD?"—sparked a youth-based revival of Christian faith in the 1990s and became one of the marketing sensations of the decade. The WWJD? movement started in 1989 when Janie Tinklenberg, a youth leader at an evangelical church in Holland, Michigan, led a book discussion with her youth group. The book under discussion was In His Steps, an inspirational story penned in 1896 by minister Charles M. Sheldon (1857–1946). The book told of a congregation who experienced spiritual and moral renewal when they asked themselves "What would.....