[xapata]

If only that weren't called a "cycle" as if it had a predictable periodicity.

[kelseyfrog]

It has inevitability, but you're right, not predictable periodicity. Is predictable periodicity a necessary part of a cycle? I feel like the rise and fall of nations is a cycle, but not necessarily one of predictable periodicity.

[xapata]

If not predictability, then regularity, and I believe that's a fundamental misunderstanding -- the system is chaotic.