Unrivalled coverage of IR theories from leading experts, including historically dominant traditions such as realism, and liberalism, to theories such as postcolonialism and green theory. Featuring a new organisation to reflect the importance and focus on global IR as well as newly authored chapters on classical realism, liberalism, Marxism, and critical theories. A wide range of case studies show readers how theory can be applied to address concrete political problems. Key Features: · Expert line-up of contributors offer coverage of dominant and emerging theories and arguments from diverse perspectives · Includes coverage of historically marginalised theories, including postcolonialism and environmentalism · A case study in each chapter shows how theory can be used to explain real-world problems and dilemmas and additional questions to encourage students to analyse and evaluate the different theories for themselves · Boxes highlighting key books or articles introduce students to prominent works in the field to encourage wider reading and research interests · Spotlights on key books and articles encourage readers to go beyond the textbook and develop their research interests, exploring important works in the field New to this Edition: · An enhanced ebook with author videos, self-test questions, and pointers to answering case study questions · Newly authored chapters on classical realism, liberalism, and Marxism provide students with fresh perspectives on these theories · Newly authored chapter on critical theories illustrates the intersectional nature of critical theories as it relates to gender, race, and decolonisation, while speaking to topical debates in the field · The global IR chapter has been moved to the beginning of the text, which encourages students to critically reflect on the context in which IR developed and appreciate the importance of viewing international relations theories from truly representative perspectives from the very start · Updated online resources include pointers on answering case study questions, supporting students to apply theories to real world issues