Plato's political philosophy has been the subject of much criticism. In Plato's Republic, Socrates is highly critical of democracy and proposes an aristocracy ruled by philosopher-kings. Plato's political philosophy has thus often been considered totalitarian by some.
In the Republic, Plato's Socrates raises a number of objections to democracy. He claims that democracy is a danger due to excessive freedom. He also argues that in a system in which everyone has a right to rule all sorts of selfish people who care nothing for the people but are only motivated by their own personal desires are able to attain power. He concludes that democracy risks bringing dictators, tyrants, and demagogues to power. He also claims that democracies have leaders without proper skills or morals and that it is quite unlikely that the best equipped to rule will come to power.
Plato, through the character of Socrates, gives an analogy related to democracy: he asks us to imagine a ship whose owner surpasses all those on the ship in height and strength, but is slightly deaf; his vision is similarly impaired and his knowledge of navigation is just as bad. He then asks us to imagine the sailors, all of which are arguing about who should have control of the helm while none of them have studied navigation. The sailors don't even know that there is such a thing as the craft of navigation. All the sailors try to convince the owner to give control of the ship over to them, and whoever convinces him becomes the navigator or captain. They manipulate and trick the owner into giving over the helm. The true captain, the one with the knowledge of navigation is seen as a useless stargazer and never becomes the helmsman. The true captain represents a philosopher-king, who knows the forms of justice and goodness.
In the Republic, the character of Socrates outlines an ideal city-state which he calls 'Kallipolis'.
Plato lists three classes in his ideal society.
Plato's ideal rulers are philosopher-kings. Not only are they the most wise, but they are also virtuous and selfless. To combat corruption, Plato's Socrates suggests that the rulers would live simply and communally. Contrary to societal values at the time, Socrates suggests that sex should not be a factor in deciding who should rule, so women as well as men can rule. Socrates proposes that the Guardians should mate and reproduce, and that the children will be raised communally rather than by their biological parents. The children's biological parents will never be known to them, so that no Guardian will prefer his or her own offspring over the common good. The children of the guardian class will be tested, and only the most wise and virtuous will become rulers.
Karl Popper blamed Plato for the rise of totalitarianism in the 20th century, seeing Plato's philosopher kings, with their dreams of 'social engineering' and 'idealism', as leading directly to Adolf Hitler and Joseph Stalin (via Georg Wilhelm Friedrich Hegel and Karl Marx respectively).