Post WW2, pre-Viet Nam. When the commies/leftists hadn't managed to get very far in their cold war here yet, because we were actually fighting them for a while.

Things were already going down hill somewhat when we landed on the moon, something I remember well.

But it is also the mindset of those times, which we saw flashes of when Reagan was in office, but nothing like back before leftism got entrenched.