I'm looking for help to track down the development of the "generation" doctrine, starting with when the WT first specifically tied the end to the generation of 1914.
Russell taught that 1914 would be the end of this system of things. When that failed, Rutherford started touting 1925.
No need to talk about generations then; it was just specific dates.
When did they first tie the end in to a "generation of 1914" time frame?
I also know that they changed the meaning of generation several times.
First, a person had to have been at least 15 in order to have seen the events of 1914 with understanding of what was happening.
I think they lowered that to 10 and then finally it was anyone who was alive in 1914.
Of course, now the generation overlaps.
Does anyone know someone where all these WT teachings are set out chronologically (preferably with citations to the literature)?
Thanks in advance.