Political anthropology examines and compares these diverse systems of social control. It also explores the power structures of societies, including the extent of consensus and the patterns of equality or inequality within them. It examines the ways in which leaders establish or bolster their authority through tradition, force, persuasion, and religion. It asks whether a society can have a legal system even without formal courts and written laws. It is also interested in the ways people resist excessive domination, both passively and through Robin Hood-style banditry and other means. Political anthropology has had interesting insights to offer us on such issues as national identity, ethnic conflict, the meaning of monarchy, and why people sometimes take the law into their own hands.