Rationality has to be guided by common sense. I’m sure Nazi Germany had many extraordinarily capable technocratic leaders but we have those in ample supply and with the computers now reasoning with us I don’t think we need more of those. Rationality is a solved problem as far as I’m concerned. We have other issues. We lack a coherent moral vision, societal cohesion, stability, sanity. Once you lose those it doesn’t really matter what system you implement, it’s just delaying the inevitable.

Seeing the billions of people who believe in the imaginary, and a few millions of these fight and kill others over these imaginary things, I would say, rationality is not a solved problem.

How were the Nazis technocrats? The core of the Nazi party were weirdo political extremists and violently nationalistic army veterans. The only example I can think of which matches your idea of an 'extraordinarily capable technocratic leader' is Speer, and like his military counterpart Rommel, his reputation has been somewhat laundered and propagandised both during and after the war.

> I’m sure Nazi Germany had many extraordinarily capable technocratic leaders [...]

Actually, not. They had a few left-over from when Germany had a functioning state, but the Nazis were overall fairly incompetent at actually running the country.

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