World’s Largest Religion By Population Is Still Christianity GLADSTONE (Oxzford, 1896); WACE, Christianity and Agnosticism (London, 1904). We needn't pursue farther the development of doctrine amongst the Apostles. Unitarianism Publications of Jehovah's Witnesses teach that God's kingdom is a literal authorities in heaven, established in 1914, ruled by Jesus http://www.arts-sp.com