Science and Math of Society

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So I was watching an old rerun from one of my all-time favorite gameshows
https://youtu.be/xyg5V1a2zcM?t=112

and was blown away by the stark contrast compared to now in terms of what is acceptable on television.

My question is:
is there a scientific explanation for why societal values change in one direction or another?
Is there a branch of math, like chaos theory,that studies tipping points that lead to one thing or another.
For example, if it werent for the Floyd incident, would this BLM stuff have blown up so much?