And there's the narrative as told in the (much recommended on HN) book "Command and Control": Eisenhower, Kennedy, and Nixon administrations all arrive outraged at the military's nuclear war strategy. And then after much attempt at reform, they leave with virtually the same strategy intact. Partly just due to getting draw into the military's way of thinking, partly due to not being able to present compelling alternatives to the military command. And then when changes do happen, they are driven bottom-up by particular events/catastrophes which make clear that the current strategies are utterly untenable. It's tough to a replace one leaky abstraction with another (potentially leaky) abstraction!