Back in the halcyon days of the Cold War, when supersonic overflight wasn't an issue and there were Nike missile installations aplenty, we knew (as children) to look for Civil Defense shelters in larger towns/cities and built family bomb shelters in the backyard (or learned, at least, to stock the basement with food, water and a transistor radio; learned to "duck and cover" under fragile desks at school, too, for the futile cover they offered. We watched grainy black and white films in school and TV commercials at home about "surviving the blast" and radiation and ... ad infinitum.
It may have been a vain hope but we were taught to find ways to survive the birthing into a different world that would be unimaginable, and - frankly (naively?) - believed that, somehow, some of us would make it to build again on the ashes of destruction.
I'm not sure exactly when the tide turned (late 1960s or early to mid 1970s, maybe?) but all these decades later I see almost universally that the pendulum has swung to the other extreme, sort of "eat, drink, and be merry - and kiss your ass good-bye - 'cuz when they push the button" (not 'if'') "we're ALL gonna' die."
Not suggesting the "old way" was better (it wasn't for very many); just noting the difference between then and now.