I saw it attributed to Pythagoras but who knows, it’s def not Plato.

Even given the older systems, which I don’t think count as ideologies in the sense I’m using it but it’s a fair label, Plato created something original by linking the methods of “reason” to the concept of utopia. That is he turned knowledge into method (ideology) that is predestined to end in utopia. And I think his Republic kind of stands alone in that era and before for the originality and strength of that link.

What he lays out in the Republic is an elite driven pyramidal hierarchy (aka meritocracy) that adheres to strict methods of “reason”, and we can see this in his Philospher King elitism that later Platonists of the left and right pick up and still push forward.

His original model is in fact the same model pushed on us by elites today, corporatist fascism. Power and decision making belong in the hands of those groups that have been indoctrinated with the right methods and the individual becomes nothing but an integrated function at best.

Another word for this philosopher king elitism is the vanguardism clearly seen in the Marxist communist ideology.