Which is why WWII and WWI are closely related: had I been writing that comment, I would have said that the revolution in social order and cancellation in debt happened in the period from WWI through to the end of WWII.
In 1910, Europe was an aristocracy, and even the US social order was defined by some enormous winners at the top. WW1 itself dramatically reoriented the power dynamics internationally, which led to dramatic political change everywhere, which setup the conflicts that resulted in WW2.
Sure, but none of this supports the stated thesis that these revolutions happen every 100-300 years and that they are a result of debt bubbles. WWI was not a debt bubble, it was a war. Not the same thing. It was also much less than 100 years before the alleged onset of the current revolutionary cycle in the 1970s.
If you look at the actual timeline between 1919 and 1933. The hyperinflation occurred 1921 and 1923. Not surprising since that is in the immediate aftermath of WWI. The actual rise to power of those guys in spiffy uniforms was 1929-1933 and was due to austerity in the face of deflation and banking collapse. Same thing happened in the US under Mellon. Only difference is the Germans picked the guy with the Charlie Chaplin Stash and the US picked a kindly man in a wheelchair.
In 1910, Europe was an aristocracy, and even the US social order was defined by some enormous winners at the top. WW1 itself dramatically reoriented the power dynamics internationally, which led to dramatic political change everywhere, which setup the conflicts that resulted in WW2.