Introduction to international relations introduces students to the principal theories in international relations, combining incisive and original analysis with a clear and accessible writing style, and a range of helpful learning features. Emphasizing the relationship between international relations theory and international relations practice, the authors carefully explain how particular theories organize and shape our view of the world.part 1: studying irwhy study ir? ir as an academic subjectpart 2: classical theories realism liberalism international society international political economy: classical theories part 3: contemporary approaches and debatesinternational political economy: contemporary debates social constructivism post-positivism in ir foreign policy part 4: key issues in contemporary irkey issues in contemporary irkey featuresupdated throughout to refl ect contemporary issues in ir.a new chapter covers feminism, post-structuralism, and post-colonialism in greater detail.a new structure guides students through developments in international relations theories, from classical theories to contemporary approaches and debates.