This is a critical introduction to Raymond Aron's conception of political science, based on a careful study of one of his central statements, The Dawn of Universal History, with collateral reference to most of his other major works, and with a clear account of his unfolding thought. Mahoney discusses Aron's relationship to such political and social thinkers as Aristotle, Tocqueville, Marx, Strauss and Von Hayek. He shows how Aron represented in a lively and vigorous way a tradition of political prudence increasingly under theoretical and practical assault. Mahoney argues that Aron's notion of political science is superior to today's reigning social science in scope, rigour and availability to practical political leaders and citizens.