Not disputing that at all. I'm talking about an 80 to 100 year cycle though. You guys have really got to read that book Fourth Turning.
I've read the piece on the web and remain unconvinced. It's a nice analogy, but not a driving force. There are plenty of reasons for the periodicity, but what you find is that many such phenomenae turn on the duration of a single life within a field, but do not operate in phase from subject to subject.