At one time in my life I thought I would someday write a book about the Rutherford years, and started collecting literature (WT and non-WT) of the time period. I came to believe/theorize that a lot of Rutherford's books can only be understood in the context of the time and knowing what he was trying to accomplish. Much of it had to do with the ongoing battle for the loyalty of the Bible Students, when as many as 75% left the WT for other groups of Bible Students. For one instance of many, the WT rejected Christmas in about 1925. Why? Because it was a time with family members, some with WT loyalty and others who had left, would get together and associate. He wanted to break that association to retain the WT adherents. They rejected the cross in the '20s. Why? Because the cross figured prominently in the Bible Students (the cross and crown pin, Cross on the old WT), and he wanted to distance his WT from them.
In time I kind of lost interest in the subject and dropped the project.