This course introduces theories in the field of comparative politics. We want to understand how the national and international environment, the political culture, the political institutions and the choices of citizens and leaders affect political performance. We explain democratization, stability, competition, citizen influence, and policy outcomes as consequences of the environment, culture and institutions--and human choices in these contexts. The theories of comparative politics offer such explanations. In this course we want to introduce some of the theories and evaluate their credibility, both through general readings and by seeing how they play out in some specific countries. We shall especially use politics in Germany to exemplify various theoretical features.