History of Jehovah's Witnesses
Jehovah's Witnesses originated as a branch of the Bible Student movement, which developed in the United States in the 1870s among followers of Christian Restorationist minister Charles Taze Russell. Bible Student missionaries were sent to England in 1881 and the first overseas branch was opened in London in 1900. The group took on the name International Bible Students Association and by 1914 it was also active in Canada, Germany, Australia and other countries. The movement split into several rival organizations after Russell's death in 1916, with one—led by Russell's successor, Joseph "Judge" Rutherford—retaining control of both his magazine, "The Watch Tower", and his legal and publishing corporation, the Watch Tower Bible and Tract Society of Pennsylvania.
History of Jehovah's Witnesses
Knorr's vice-president, Frederick William Franz, became the leading theologian for the group and the pace of doctrinal change slowed. Blood transfusions were prohibited for Witnesses from 1945 and in 1961 the eating of blood in meat was also proscribed, "The Watchtower" instructing Witnesses to check with their butcher whether the animals and fowl he sold had been properly drained of their blood. Birthday celebrations were described as "objectionable" in 1951 because of their pagan origins and other explicit rules regarding acceptable conduct among members were introduced, with a greater emphasis placed on disfellowshipping as a disciplinary measure.