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
Assemblies Jehovah Shammah worship; until the last two decades, the great majority of Brethren assemblies around the world had a policy of reserving the "vocal" roles in worship to men only. Much (though not all) of the Indian Brethren movement remains very conservative and resistant to the changes that have occurred in some parts of the Brethren world in the last generation. This is one of the lines of demarcation between the Assemblies Jehovah Shammah and the older Indian Brethren movement. Although the Assemblies Jehovah Shammah developed independently of the Indian Brethren movement, the many similarities between the two movements mean that the