This text provides a comprehensive introduction to comparative politics. Comparative politics is an empirical science that deals primarily with domestic politics. It is one of the three main subfields of political science, alongside international relations and political theory. Comparative politics has three goals: to describe differences and similarities between political systems and their features; to explain these differences; and to predict which factors may cause specific outcomes. This edition compares the most important features of national political systems and contains chapters on integration, globalization, and promotion of democracy in non-Western parts of the world. This introductory chapter explains what comparative politics is, and discusses its substance as well as method.