I was reading your post, and thought f the event that got us out of the funk after the events of Nov. 1963, and thought of the Beatles, and then you said it in your post.
In 1964, The Beatles were good for America, and America was good for the Beatles.
One other thing to recall about those times. Most everyone was working, and there was abundant economic rewards for anyone who wanted to work.
Work, in and of itself, is rewarding and tends to mollify other unpleasant events in one’s life.
Also, the huge welfare underclass that we have to deal with today was not a factor. Johnson gets credit for creating that chronic problem.