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 Bible Student organizations independent of the Watch Tower Society, most of which still exist. By mid-1919, as many as one in seven of Russell-era Bible Students had ceased their association with the Society, and as many as three-quarters by the end of the 1920s. On July 26, 1931, at a convention in Columbus, Ohio, Rutherford introduced the new name – "Jehovah's witnesses" – based on Isaiah 43:10: "'You are my witnesses,' declares Jehovah, 'Yes, my servant whom I have chosen, So that you may know and have faith in me And understand that I am the same One. Before me