This text offers a comprehensive analysis of world politics in a global era. It examines the main theories of world politics—realism, liberalism, Marxism, social constructivism, poststructuralism, post-colonialism, and feminism. It reviews the main structures and processes that shape contemporary world politics, such as global political economy, international security, war, gender, and race. Furthermore, it addresses some of the main policy issues in the globalized world, including poverty, human rights, and the environment. This introduction offers some arguments both for and against seeing globalization as an important new development in world politics. It also explains the various terms used to describe world politics and the academic field, particularly the use of ‘world politics’ rather than ‘international politics’ or ‘international relations’. Finally, it summarizes the main assumptions underlying realism, liberalism, Marxism, social constructivism, post-structuralism, post-colonialism, and feminism.