Political science is the academic study of politics and political systems. It began in ancient Greece and the first political science department was established at Columbia University in 1880. The field has several subfields including comparative politics, American politics, and international relations. Political science research can be normative, focusing on ethical issues, or empirical, relying on observable data. Researchers use various methods like case studies, surveys, and experiments to study political phenomena scientifically. The goal is to form hypotheses, identify variables, clarify measurement, and develop theories to gain a better understanding of politics.