The problem of demonism is the central problem in Huxley's last and most important book — "Island". The inability of the sane society to deal with demonism of only one man brings the society down. The apocalyptic finale of the book is the message to humanity: if you don't find a way to stop your demons, they will take you to hell.

Killing demons is an easy solution in the short term, but it doesn't solve the problem in the long term, because demons will bring their bad karma back into this world in their future incarnations. We must change the world in such a way that demonism cannot triumph in principle. If we fail, the world will end one way or another.