Awhile back. Monsignior Smiff suggested to us that reasonable folks are the really dangerous ones -- much more than the ineffective or barmy ones.
I researched this point by a quick review of two nearly simultaneous takes on nuclear war from the the edge time between the Camelot and feedlot mid-60's, namely Dr Strangelove and Fail-safe, and I'm forced to agree with him.
Henry Fonda in Fail-safe is much the most frightful figure in either movie, acing Sellers' Prez and Sellers' doc with the greatest of ease.