About the Book: An authoritative introduction to International Relations theory, covering major approaches including realism, liberalism, postcolonialism, Marxism, critical theory, feminism, constructivism, institutionalism, post-structuralism, and green theory. The sixth edition provides a more global and contemporary perspective, connecting theoretical concepts with issues such as migration, gender, fake news, international institutions, and environmental crises. Ideal for students, researchers, and readers studying international politics, global affairs, and political science.