"Introduction," History of Political Philosophy, ed. Leo Strauss and Joseph Cropsey, Rand McNally, 1963. Second Edition: Rand McNally, 1972. Third Edition, University of Chicago Press, 1987.
Today “political philosophy” has become almost synonymous with “ideology,” not to say “myth.” It surely is understood in contradistinction to “political science.” The distinction between political philosophy and ‘political science is a consequence of the fundamental distinction between philosophy and science. Even this fundamental distinction is of relatively recent origin. Traditionally, philosophy and science were not distinguished: natural science was one of the most important parts of philosophy. The great intellectual revolution of the seventeenth century which brought to light modern natural science was a revolution of a new philosophy or science against traditional (chiefly Aristotelian) philosophy or science. But the new philosophy or science was only partly successful. The most successful part of the new philosophy or science was the new natural science. By virtue of its victory, the new natural science became more and more independent of philosophy, at least apparently, and even, as it were, became an authority for philosophy. In this way the distinction between philosophy and science became generally accepted, and eventually also the distinction between political philosophy and political science as a kind of natural science of political things. Traditionally, however, political philosophy and political science were the same.
Political philosophy is not the same as political thought in general. Political thought is coeval with political life. Political philosophy, however, emerged within a particular political life, in Greece, in that past.
of which we have written records. According to the traditional view, the Athenian Socrates (469-399 B.C.) was the founder of political philosophy. Socrates was the teacher of Plato, who in his turn was the teacher of Aristotle. The political works of Plato and Aristotle are the oldest works devoted to political philosophy which have come down to us. The kind of political philosophy which was originated by Socrates is called classical political philosophy. Classical political philosophy was the predominant political philosophy until the emergence of modern political philosophy in the sixteenth and seventeenth centuries. Modern political philosophy came into being through the conscious break with the principles established by Socrates. By the same token classical political philosophy is not limited to the political teaching of Plato and Aristotle and their schools; it includes also the political teaching of the Stoics as well as the political teachings of the church fathers and the Scholastics, in so far as these teachings are not based exclusively on Divine revelation. The traditional view according to which Socrates was the founder of political philosophy is in need of some qualifications, or rather explanations; yet it is less misleading than any alternative view.