In the mid-1930s Herbert W. Armstrong, an unsuccessful American advertising executive, founded a millennialist Sabbatarian Christian sect with a heterodox theology. Over the next half century, despite a number of setbacks, scandals, criticisms, and attacks from former members and anti-cultists, Armstrong's organization, the Worldwide Church of God, grew to around 100,000 baptized members with a world circulation of over six million for its flagship...