> The average age of the world's greatest civilizations has been 200 years.

Sounds like total bullshit. I briefly googled it and apart from AI also telling me that it was total bullshit, the first list I found split the Roman empire in two so it would neatly match the hypothesis!

Someone just thought of that and then found data to fit their neat idea.

>> The average age of the world's greatest civilizations has been 200 years.

> Sounds like total bullshit.

You're right. It more like an avg of 118 years (median 73), not 200, depending on what you mean by "greatest" ofc. The Ancient Romans, US, and Dutch pulling that average up and 1/3 of historically modern continuing democracies having a short lifespan being founded around WW2, pulling it down.

The Roman Empire was not stable for an uninterrupted period of time. It's conceptually called a single state for simplicity, because such a large period of time and area of land naturally had instability (less than current Europe, granted). The Roman Empire democratic government lasted about 487 years before falling into autocratic rule.