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
Jehovah's Witnesses beliefs God's standards of conduct and morality, use of the divine name "Jehovah" in worship, membership of God's "organization", and active support of anointed Christians. Based on a literal interpretation of scriptures such as Revelation 14:1–4, Jehovah's Witnesses believe that exactly 144,000 faithful Christians go to heaven as spirit creatures to rule with Christ in the kingdom of God. They believe that most of those are already in heaven, and that the "remnant" at Revelation 12:17 (KJV) refers to those remaining alive on earth who will be immediately resurrected to heaven when they die. The Witnesses understand Jesus’ words at John