On Politics

Where Plato imagined the ideal state, Aristotle went out and counted the real ones. That difference, between the philosopher who reasons toward the perfect city and the one who collects and compares the actual cities, is the difference that makes the Politics the founding document of political science as an empirical study. Aristotle and his students gathered the constitutions of more than a hundred Greek states, and out of that comparison he built a theory of how governments actually work, hold, and fail.

The most quoted line in the book is also its foundation: the human being is by nature a political animal. Aristotle does not mean we are fond of elections. He means that living in a political community is not an add-on to human life but the thing human life is for. A person outside the city, he says, is either a beast or a god, because only in the shared life of a self-governing community do we become fully what we are. The polis exists not merely to keep people alive but to help them live well.

That claim still does work. It is the answer to anyone who treats government as a necessary evil, a referee we tolerate so we can get on with private life. For Aristotle the public life is not the cost of the private one. It is the point.

Aristotle sorts governments by two questions: how many rule, and in whose interest. Rule by one, few, or many, each in either a healthy form that serves the common good or a corrupt form that serves the rulers. Monarchy degrades into tyranny, aristocracy into oligarchy, and the rule of the many, which he calls polity at its best, degrades into mob rule. That sixfold scheme organized political thought for two thousand years, and the American founders had it in their heads when they argued about mixed government and the dangers of faction.

His own preference is instructive. Aristotle distrusts both the very rich and the very poor as rulers, and puts his faith in a large middle group with enough property to be independent and not enough to be greedy. A stable state, he argues, rests on a broad middle. It is hard to read that now without thinking about the present.

The Politics is dense and was never polished for publication, it reads like lecture notes, because that is what it is. But it rewards the work. The full text is public domain and free to read. Go to it for the classification of regimes and the argument about the middle class, and stay for the running insistence that politics is the master science, the one that asks what the whole human good requires.