The best books on Wagner
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One thing that faded away in time is the sheer intensity and cult-of-personality that surrounded his fame.
you can be a christian zionist now (which is what the nazis were), can you really be a christian philo-semite? but then of course christian now means neosecular humanist.
nietzsche saw the structural problems in christianity, but he lacked the social insight into why other people depended on it.
https://www.youtube.com/watch?v=B8ISzf2pryI
(because nobody likes feeling guilty)
he tried to work the problem from the wrong end, controlling what people do and how they think quickly turns into socialism, fascism, communism. easing the burden of their guilt after the fact is a much more convenient solution, it's pragmatic and simple. children don't really learn what they are being taught, they learn to teach it.
machiavelli solved both fascism and marxism 300 years before either had to become a thing, the less said about the more unsavory aspects of the enlightenment the better. i deeply suspect most influential thinkers of the previous centuries had ulterior personal motives, some rather sinister when it came to the mobilization of the furies and passions of human nature.