HIGHLY RECOMMENDED. Most interesting theory I've seen in a long while.
It's an extension/elaboration of the theory of The Fourth Turning (Strauss–Howe generational theory) that noticed that human civilization seems to follow a 80 year micro-cycle with war breaking out every 80 years, fertility increasing and collapsing over the same time period (but at a different phase). The Fourth Turning noticed the pattern but could not explain it.
The amateur scientist Janne Miettinen was fascinated by this and, through his own research, noticed that data/measurements of levels of the 4 human hormones testosterone, growth hormone, dopamine and cortisol followed a 80 year cycle (!!), such cycles also exist in the animal kingdom, and thus could possibly be the basis of the micro-cycle.
HIGHLY RECOMMENDED. Most interesting theory I've seen in a long while.
It's an extension/elaboration of the theory of *The Fourth Turning* (*Strauss–Howe generational theory*) that noticed that human civilization seems to follow a 80 year micro-cycle with war breaking out every 80 years, fertility increasing and collapsing over the same time period (but at a different *phase*). *The Fourth Turning* noticed the pattern but could not explain it.
The amateur scientist Janne Miettinen was fascinated by this and, through his own research, noticed that data/measurements of levels of the 4 human hormones testosterone, growth hormone, dopamine and cortisol followed a 80 year cycle (!!), such cycles also exist in the animal kingdom, and thus could possibly be the basis of the micro-cycle.
[hormonal cycles](https://jannemiettinen.fi/FourthTurning/hormone-cycle-animal-populations.png)
[*The "original" Strauss–Howe generational theory*](https://en.m.wikipedia.org/wiki/Strauss%E2%80%93Howe_generational_theory)
[*Miettinen's theory: CYCLICAL METAPOPULATION MECHANISM HYPOTHESIS*](https://jannemiettinen.fi/FourthTurning/)
(post is archived)