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
Criticism of Jehovah's Witnesses that acceptance of blood fractions from donated blood is a matter of conscience. A 2006 issue of Jehovah's Witnesses' newsletter "Our Kingdom Ministry" stated, "Although [Jehovah's Witnesses] do not donate or store their own blood "for transfusion purposes", some procedures or tests involving an individual’s blood are not so clearly in conflict with Bible principles. Therefore, each individual should make a conscientious decision" [emphasis added]. Raymond Franz has challenged these policies because acceptable blood fractions can only be derived from stored blood provided by donors. Regardless of the medical considerations, Jehovah Witnesses advocate that physicians should uphold the right of