defectors and expelled Witnesses. In 1992, Milton George Henschel, then a member of the Governing Body, succeeded Franz as president of the Watch Tower Society of Pennsylvania. In 2000, members of the Governing Body resigned from positions on the boards of the Watch Tower Society and its subsidiary corporations in order to focus on doctrinal matters. Don Alden Adams then replaced Henschel as president. Following Adams' death in 2014, Robert Ciranko became president of the Watch Tower Society. Beginning in 2004, various Watch Tower Society properties in Brooklyn were sold in preparation for the establishment of a new world headquarters in Warwick, New York, completed in 2016. Doctrinal changes In 1995, changes regarding their understanding of Jesus' comments regarding "this generation" (from Matthew 24:34) were published. Throughout the previous four decades, Jehovah's Witnesses had taught that the generation that saw the events of 1914 would not die out before Armageddon came. The understanding of the "generation" was again adjusted in 2008, to refer to the remnant of the anointed. In 2010, the definition of the generation was changed again, wherein the lives of anointed individuals living in 1914 overlap with a second group alive in the present day, some of whom will see Armageddon. Jehovah's Witnesses continue to teach that Armageddon is imminent. See also Development of Jehovah's Witnesses doctrine Eschatology of Jehovah's Witnesses Persecution of Jehovah's Witnesses Unfulfilled Watch Tower Society predictions Watch Tower Society presidency dispute (1917) References Further reading Four official histories of Jehovah's Witnesses have been published by the Watch Tower Society. The first two are out of print. The most recent one is available online. Qualified To Be Ministers, pages 297–345 (1955) Jehovah's Witnesses in the Divine Purpose (1959) Jehovah's Witnesses—Proclaimers of God's Kingdom (1993) God’s Kingdom Rules! (2014) Books by members Jehovah's Witnesses: The New World Society by Marley Cole. This book received a positive review in the August 15, 1955 Watchtower: "Much of the material was gathered by personal interviews with witnesses, some of them being officials of the Society. Frequently in the news is something about the religion of President Eisenhower's parents. This book gives the facts often overlooked or concealed, with documentary proof that they were Jehovah's witnesses for many years." Cole was an active Witness and wrote the book in collaboration with Witness leaders. It was also distributed by the Watch Tower Society. 229 pages. Publisher: The Vantage Press, 1955.