Here's a copy paste from Don Cameron :
The basic approach "Captives of a Concept" takes is to compare two things about the Watchtower Society:
(1) Their interpretation of Matthew 24:45-47 as explained in their book "God's Kingdom of a Thousand Years Has Approached"
(2) The organization's history that relates to their interpretation as explained in their book "Jehovah's Witnesses - Proclaimers of God's Kingdom."
"Captives of a Concept" doesn't try to show that their interpretation of Matthew 24:45-47 does not agree with the Bible. Rather, that it doesn't agree with what actually went on in the organization's history.
The reason why it is so important to realize this fact is because the organization's claim to being "God's organization" today requires that their interpretation of Matthew 24:45-47 and their history agree with each other. But they don't agree.
The reason why there are millions of Jehovah's Witnesses today is not because they all DID make the above comparison before they got baptized but rather because they all did NOT make it. The book refers to this fact as "The One Mistake All Jehovah's Witnesses Have Made."
"Captives of a Concept" does not make this mistake. It very carefully makes the above comparison, which then makes it difficult to believe that God has ever had anything to do with the Watchtower Society.
Once Raymond Franz finally made the above comparison (in 1979) He concluded the following: "It would be an insult to Christ Jesus to say that he selected the Society on the basis of what it had been teaching as of 1919."
One would need to make the same comparison to appreciate why he felt that way.
CaptivesOfaConcept.com