I don't know that I buy it because the Nazi and German Communist movements had their roots in the defeat of WWI, a monarch who resigned, radical changes in gove

I don't know that I buy it because the Nazi and German Communist movements had their roots in the defeat of WWI, a monarch who resigned, radical changes in government, and the hyper-inflationary period of the Weimar. It was even predicted that the Treaty of Versailles would be ruinous. Although I am sure someone will disagree, it's hard to see how there were many improvements to life prior to about 1920 for German people that would cause frustration in the way described. I think it's still possible some movements are directly a result of lack of improvement.