While therefore in other countries such as France, England, Germany, and Holland, the general tradition in the social and political sciences worked in behalf of anti-state individualism, and therefore of liberal and democratic doctrines, Italy, on the other hand, clung to the powerful legacy of its past in virtue of which she proclaims the rights of the state, the preeminence of its authority, and the superiority of its ends. The very fact that the Italian political doctrine in the Middle Ages linked itself with the great political writers of antiquity, Plato and Aristotle, who in a different manner but with an equal firmness advocated a strong state and the subordination of individuals to it, is a sufficient index of the orientation of political philosophy in Italy. We all know how thorough and crushing the authority of Aristotle was in the Middle Ages. But for Aristotle the spiritual cement of the state is "virtue" not absolute virtue but political virtue, which is social devotion. His state is made up solely of its citizens, the citizens being either those who defend it with their arms or who govern it as magistrates. All others who provide it with the materials and services it needs are not citizens. They become such only in the corrupt forms of certain democracies. Society is therefore divided into two classes, the free men or citizens who give their time to noble and virtuous occupations and who profess their subjection to the state, and the laborers and slaves who work for the maintenance of the former. No man in this scheme is his own master. The slaves belong to the freemen, and the freemen belong to the state. It was therefore natural that St. Thomas Aquinas the greatest political writer of the Middle Ages should emphasize the necessity of unity in the political field, the harm of plurality of rulers, the dangers and damaging effects of demagogy. The good of the state, says St. Thomas Aquinas, is unity. And who can procure unity more fittingly than he who is himself one? Moreover the government must follow, as far as possible, the course of nature and in nature power is always one. In the physical body only one organ is dominant--the heart; in the spirit only one faculty has sway--reason. Bees have one sole ruler; and the entire universe one sole sovereign--God. Experience shows that the countries, which are ruled by many, perish because of discord while those that are ruled over by one enjoy peace, justice, and plenty. The States which are not ruled by one are troubled by dissensions, and toil unceasingly. On the contrary the states which are ruled over by one king enjoy peace, thrive in justice and are gladdened by affluence.[2] The rule of the multitudes can not be sanctioned, for where the crowd rules it oppresses the rich as would a tyrant.[3]