Fractal Nature of Empires?

You may have heard of Strauss–Howe generational theory. They believe that every four generations marks a cycle and then repeats. The "fourth turning," usually marks a crisis: the American Revolution, the Civil War, and WWII, and today.

The Chinese have a saying "wealth does not pass the third generation." This is essentially the same argument, except focused on family fortunes.

Today, I came across this: The Fate of Empires

The empires Glubb studied had a lifespan of about ten human generations, or two hundred and fifty years, despite changing factors such as technology.

What's interesting about the 10 generations is that it almost lines up as the four generation model scaled up.