In the _Ethics_ Aristotle condemns democracy, even with a property qualification, as the worst of governments. But near the end of his life, when he composed his _Politics_, he was brought, grudgingly, to make a memorable concession. To preserve the sovereignty of law, which is the reason and the custom of generations, and to restrict the realm of choice and change, he conceived it best that no class of society should preponderate, that one man should not be subject to another, that all should command and all obey. He advised that power should be distributed to high and low; to the first according to their property, to the others according to numbers; and that it should centre in the middle class. If aristocracy and democracy were fairly combined and balanced against each other, he thought that none would be interested to disturb the serene majesty of impersonal government. To reconcile the two principles, he would admit even the poorer citizens to office and pay them for the discharge of public duties; but he would compel the rich to take their share, and would appoint magistrates by election and not by lot. In his indignation at the extravagance of Plato, and his sense of the significance of facts, he became, against his will, the prophetic exponent of a limited and regenerated democracy. But the _Politics_, which, to the world of living men, is the most valuable of his works, acquired no influence on antiquity, and is never quoted before the time of Cicero. Again it disappeared for many centuries; it was unknown to the Arabian commentators, and in Western Europe it was first brought to light by St. Thomas Aquinas, at the very time when an infusion of popular elements was modifying feudalism, and it helped to emancipate political philosophy from despotic theories and to confirm it in the ways of freedom.
The three generations of the Socratic school did more for the future reign of the people than all the institutions of the States of Greece. They vindicated conscience against authority, and subjected both to a higher law; and they proclaimed that doctrine of a mixed constitution, which has prevailed at last over absolute monarchy, and still has to contend against extreme Republicans and Socialists, and against the masters of a hundred legions. But their views of liberty were based on expediency, not on justice. They legislated for the favoured citizens of Greece, and were conscious of no principle that extended the same rights to the stranger and the slave. That discovery, without which all political science was merely conventional, belongs to the followers of Zeno.