Plato was accused by some of his twentieth-century critics of racism, totalitarianism, fascism, and other political crimes with a very contemporary flavor. These accusations are too anachronistic to be taken seriously; whatever explains Hitler and Mussolini, it is not the dialogues of Plato. The more plausible complaint is that Plato does not take seriously the inescapability of politics in some form. Plato's metaphysics is fascinating; so is his conviction that the just man does better than the unjust man, no matter what earthly fate befalls him. His political thinking often amounts to an injunction to abolish the conflicts that politics exists to resolve and fantasies about how it might be done.
On Politics: A History of Political Thought: From Herodotus to the Present (2012) - Ch. 2 : Plato and Antipolitics