When we do political science, we set out to discover uniformities in the political world. We assume that the swirl of political events— wars, elections, coups, riotr incidences of corruption, and other political phenomena—can be understood in rather simple and precise ways. We develop concepts, hypotheses, and theories in order to describe and explain politics. Using the assumptions and methods of one or more of the research schools of political science, we are guided in our search by the rules of logic and the proper use of evidence. Political science, like any science, uses analytic techniques to posit and explore regularities in the world around us.