A History of Political Theories by William Archibald Dunning is a multi?volume scholarly work tracing the evolution of political thought from ancient Greece through the medieval era and into modern times. It examines the contributions of philosophers, jurists, and theologians such as Plato, Aristotle, Aquinas, Luther, Hobbes, Locke, Montesquieu, Rousseau, and Spencer, showing how their ideas shaped governance, law, and political institutions.