486
Archaeologists in 4000 AD
(hexbear.net)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Oh I didn't mean it sincerely, just by gut feeling I'd assume the lifetime of empires is something like an exponential distribution, so talking about the mean gives really no insight as to how long any given empire will last.
I just think its funny (with a solid dose of gallows humor) that this number is being floated so often, just as the US is sliding into fascism, 248 years after it's founding
Fascism, famously incapable of driving imperialism.
/s I guess, just in case
Edit: fixed a typo