we presume that every one who knows how to get votes knows how to administer a city or a state. When we are ill we call for a trained physician, whose degree is a guarantee of specific preparation and technical competence—we do not ask for the handsomest physician, or the most eloquent one; well then, when the whole state is ill should we not look for the service and guidance of the wisest and the best? To devise a method of barring incompetence and knavery from public office, and of selecting and preparing the best to rule for the common good—that is the problem of political philosophy.
But behind these political problems lies the nature of man; to understand politics, we must, unfortunately, understand psychology. "Like man, like state" (575); "governments vary as the characters of men vary;…states are made out of the human natures which are in them" (544); the state is what it is because its citizens are what they are. Therefore we need not expect to have better states until we have better men; till then all changes will leave every essential thing unchanged. "How charming people are!—always doctoring, increasing and complicating their disorders, fancying they will be cured by some nostrum which somebody advises them to try, never getting better, but always growing worse.…Are they not as good as a play, trying their hand at legislation, and imagining that by reforms they will make an end to the dishonesties and rascalities of mankind—not knowing that in reality they are cutting away at the heads of a hydra?" (425).
Let us examine for a moment the human material with which political philosophy must deal.
Human behavior, says Plato, flows from three main sources: desire, emotion, and knowledge. Desire, appetite, impulse, instinct—these are one; emotion, spirit, ambition, courage—
