I believe the real shift was generational: by 1979 it was the cusp of the earliest Boomers who were raising young kids. They weren't like their parents, growing

I believe the real shift was generational: by 1979 it was the cusp of the earliest Boomers who were raising young kids. They weren't like their parents, growing up in post-war life: They were scared of urban pollution and crime, and didn't have a popular collective experience like WWII, but a divisive one(the 60's, in sum) which helped produce a variety of bogeyman narratives of dangerous Vietnam veterans roaming the streets, illegal immigrants selling drugs, Satanic cult leaders and so forth. Part of the embracing of Reagan's America was in overlooking the parts of this narrative that were self-inflicted by prior US actions, and moving blame to scapegoats. Thus, "stranger danger", distrust of the city, and a general self-alienation with society in favor of personal safety was normalized at that time. There were definite benefits to the Boomer outlook at the time: smog was curtailed, health-conscious diet and regular exercise became a popular idea(albeit heavily fad-driven). But it also created a more litigious, low-trust climate, which has only driven in the alienation further. Today's political climate is a sort of crescendo on all those concerns, and I see in the current working-age generations much greater willingness to change the deal.