I remember M. A. D.. I also remember the Cuban missile crisis and duck and cover drills in school. When the "Russians backed down" many regarded Kennedy as the hero. After investigating the matter further I think Kruschev's actions are what stopped an almost certain nuclear exchange. Remember that America did remove their missiles from Turkey as part of a Diplomatic solution.
Practicle reasons do form a basis for policy as Humbled said. More is involved in the thinking process. As ex witnesses we can find many examples of people wakeing up because of an emotional reason as opposed to doctrine.
Perhaps learning how to help people trapped in a cult, will translate into how to improve the dangerous world we live in.