1. https://en.wikipedia.org/wiki/Strauss%E2%80%93Howe_generatio...

2. Modern societies are really complex, and a great deal of information-processing work is required to keep them functioning. Authoritarian governments maintain control by concentrating power, which means there are too few people available to make decisions about the behaviour of the system. A good example is the centrally-planned economy of the Soviet Union, which was outperformed by 'the invisible hand of the market', which is really a metaphor for the collective decisions of all participants in market economies. Consequently, authoritarian governments always collapse in the end. It's interesting to note, however, that the Soviet Union and the fascist or quasi-fascist governments in Spain and Portugal lasted much longer than Nazi Germany or Fascist Italy, because they built up some institutions that resulted in less concentration of power.