It's not just Glubb. The Changing World Order by Ray Dalio also arrives at the 250 year number.
Cliodynamics and Structural-Demographic Theory suggests cycles of 200-300 years as well.
It's not just Glubb. The Changing World Order by Ray Dalio also arrives at the 250 year number.
Cliodynamics and Structural-Demographic Theory suggests cycles of 200-300 years as well.