That’s a good point. The 80-year “saeculum” cycle from The Fourth Turning is just one cycle of many.

Ray Dalio claims we are at the end of the 250-year “empire” cycle, as well as the 100-year long-term debt cycle.

Maybe there is a 2-millennia Israel cycle as well. Or maybe there’s no Israel cycle at all.

Just some crude mechanisms for understanding the ebbs and flows of civilization.