On a deeper level, this is a radical redefinition of American attitudes. Not simply that America can be a place where the family legacy gets better, ever and ever upwards over time. But rather that families are simply happy with maintaining their status-quo. A lot of families have simply given up on the idea that they or their progeny will actually get more and more over time. Great swaths of America have plateaued.
But the deeper breakdown is that a 60s-90s middle-class American mindset is entirely different than a declining middle-class 2000s mindset. People are getting disgusted with their churches. Kids are revolting against the "happy-happy everything is grand" mindset of the housewife and successful father. Religious discourse and advice-giving is increasingly met with disdain as the next generation is given doses of meaningless bourgeois prattle about God, jobs and life.
Arguments are not simply political, but social and spiritual. A whole generation is saying, "That doesn't work!" It is not an argument, but a serious conflict. Not simply a "generational divide" between equally bourgeois groups arguing about politics or technology or whatever. But sharp, class-based logics running into each other.
But the more abstract question is what do these early fault-lines entail for the political process?