The only problem being that both Nazism and communism have had major failures and reverses so they may have a job filling the void left by the decline in Christianity and liberal democracy endless growth in the future .
But I suppose we see their failures because we are sort of close to them, and we live in a system that wants to point out the failure of other systems So they may be rehashed in some form or other, but we have to put this in the context of less resources and less energy .
When you look at Nazism you could look at the American Black Panther movement making links with Zimbabwe and South Africa and working at murdering non Africans, that’s a utopian project again and not nihilism, I’d expect to see a lot more of that going on.
Human population is going to fall my guess largely by genocide its either that or starvation
