Political science is nothing if not diverse. In the second chapter, I presented four contrasting explanations of turnout in national elections. Following that, I reviewed five research schools in political science, each containing many studies. In Chapter 4, I displayed two contrasting theories of revolution in capitalist societies, six analyses of the formation of political groups, clashing research structures in the analysis of vote choice, and six different explanations of political violence. These illustrations depict a discipline that is not known for order and coherence.