Hi doma,
Why would a human timeline of history be organised around the number of digits on our hands?
I don't get that aspect of your theory?
We both know there are wars nearly all the time in the world so you are bound to hit pay-dirt if you base a cycle on them.
But if you want a long cycle with a pedigree, how about Kondratief?
What was it Mark Twain said. History doesn't repeat itself. It just rhymes. (Too lazy to look up actual quote today)