[uplifter]

> By Nietzsche's account it was the 1900s.

I’m confused by this because Nietzsche died in 1900. Was it a prophecy? Or did you mean the 1800s?

[nonrandomstring]

> Or did you mean the 1800s?

Yes, silly me. He was talking about the times he saw around him (late 1800s) rather than prophesising. In Beyond Good and Evil he poses the open question "what sacred games shall we have to invent?". It was Freud and Jung who were possessed with visions of awful wars to fill the vacuum.