History of Jehovah's Witnesses book, "Three Worlds and the Harvest of This World", was published in early 1877. It articulated ideas that remained the teachings of Russell's associates for the next 40 years, many of which are still embraced by Jehovah's Witnesses: it identified a 2520-year-long era called "the Gentile Times", which would end in 1914, and broke from Adventist teachings by advancing Russell's concept of "restitution" — that all humankind since Adam would be resurrected to the earth and given the opportunity for eternal perfect human life. Russell claimed it was the first book to combine biblical end-time prophecies with the concept of
Eschatology of Jehovah's Witnesses world in 1969, stated about that promised reign (which would begin at "God's fixed time"): In 1968, a "Watchtower" article asked: "Why Are You Looking Forward to 1975?": Young Witnesses were advised in 1969 to avoid careers requiring lengthy periods of schooling and a 1974 issue of the "Kingdom Ministry" newsletter commended Witnesses who had sold their homes and property to engage in full-time preaching, adding: "Certainly this is a fine way to spend the short time remaining before the wicked world's end." In a lecture in early 1975, then vice president Fred Franz selected sundown on September 5, 1975