I personally cannot think of a single other religion that has totally changed (and largely negated their old) doctrines every 25 years throughout their history the way the Watchtower Society has.
This is a tacit admission that things were so wrong that they needed periodic major overhauls, and there is no sign that the overhaul process is stabilizing.
Hence the need to throw away all the old literature.
You were so right james_ woods never a truer word was spoken