History

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

2020–2023 hasn’t really formed anything solid to be stabilized, how does it even compare to the others? ai doesn’t have a defined role yet, and the long term effects of the pandemic aren’t clear either!
for me, eth’s merge (2022) is a revelution in financial history