It's a US-centric graph, if I'm not mistaken. But it is interesting that WW2 doesn't trail effects. Although, there is a long-standing theory that WW1 and WW2 were just the same war.
Methinks Alkamie disguised a call of 'bullshit!' behind a sort of empty platitude such as "I find it interesting".
>It's a US-centric graph
The title is "Human cycles: History as science"
A US-centric graph that represents the cycles of humanity?
>cliodynamics
Do we need a fancy name for the phenomenon that aspects of history tend to repeat?
Yes, aspects of history tend to repeat, but there's no way to use that knowledge to determine periodicy, severity, when it will happen, if it will happen etc.