The Citadelization Defense Against Group Insanity

We humans have collected enough of our history to know there are regular periods of group insanity that infect the human mind.  From the bible story of the Tower of Babel to the recent examples of the Chinese Cultural Revolution and the Cambodian Killing Fields, we humans regularly become the tool of our own destruction.  First, we will theorize why this happens and then apply the principles of citadelization as a defense.