Bowling Alone[0] is usually the referenced tome. I would also throw "rising inequality" in the list of causes, but also a lack of unifying culture beyond nihil

Bowling Alone[0] is usually the referenced tome. I would also throw "rising inequality" in the list of causes, but also a lack of unifying culture beyond nihilism, which isn't conducive to holding people together. [0] https://en.wikipedia.org/wiki/Bowling_Alone https://en.wikipedia.org/wiki/Bowling_Alone