The major lesson of the Cuban Missile Crisis is this: The indefinite combination of human fallibility and nuclear weapons will destroy nations. [The Fog of War]
Human extinction would be more like it. But instead of paying attention to the fact we just downed a Syrian aircraft in Syrian airspace, and the Russians said they will shoot our jets down, we obsess about climate change, which data shows hasn’t really changed in the secular or long term sense. Go figure!