The doctrines of Jehovah's Witnesses have developed since publication of The Watchtower magazine began in 1879. Early doctrines were based on interpretations of the Bible by Watch Tower Bible & Tract Society founder Charles Taze Russell, then added to, altered or discarded by his successors, Joseph Rutherford and Nathan Knorr. Since 1976, doctrinal changes have been made at closed meetings of the group's Governing Body, whose decisions are described as "God's progressive revelations". These teachings are disseminated through The Watchtower, and at conventions and congregation meetings. Most members of the denomination outside the Governing Body play no role in the development of doctrines and are expected to adhere to all those decided at the Warwick, NY headquarters. Jehovah's Witnesses a