Was America ever together? Perhaps briefly during WWII.
I think about 1966 was pretty good.
Long hair and hippie lifestyle and psychedelic rock and the rest made “straights” beat up guys with long hair and then SDS and antiwar demonstrations fought the straights. Vietnam did it, of course.
The real turning point for me was black violence and feminism, so 1967 and 1972. Never back together like Humpty Dumpty.