I always forget how immensely powerful the ending of this trilogy is! And how many fascinating insights it makes into humanity.

She told me many things … She said that all the history of human life has been a struggle between wisdom and stupidity. She and the rebel angels, the followers of wisdom, have always tried to open minds; the Authority and his churches have always tried to keep them closed. She gave me many examples from my world.

That seems pretty darn applicable to our world.