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Like fire and ice: Why societies are increasingly fragmenting.
"The transition, the researchers say, is abrupt. But what causes the tipping? In the phase transition of water, it is temperature; in societies, according to their theory, the tipping point is the number of contacts people have. Thanks to the internet, smartphones and social media, this number has exploded in recent years."
https://phys.org/news/2020-11-ice-societies-increasingly-fragmenting.html
Paper:
https://royalsocietypublishing.org/doi/10.1098/rsif.2020.0752