@vitalik.eth
What are your favorite "long century" dividers?
(see: https://en.wikipedia.org/wiki/Long_nineteenth_century )
Mine so far:
1643-48: Ming -> Qing transition, end of 30y war (treaty of Westphalia), Galileo dies and Newton born
1789: French revolution, dawn of formalized chemistry (Lavoisier)
1911-17: Xinhai revolution, WW1, Russian revolution, theories of relativity
2020-23: COVID, end of pax americana, AI passing Turing test