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 FeaturesExpert line-up of contributors offer coverage of dominant and emerging theories and arguments from diverse perspectivesIncludes coverage of historically marginalised theories, including postcolonialism and environmentalismA 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 themselvesBoxes highlighting key books or articles introduce students to prominent works in the field to encourage wider reading and research interestsSpotlights on key books and articles encourage readers to go beyond the textbook and develop their research interests, exploring important works in the fieldNew to this EditionAn enhanced ebook with author videos, self-test questions, and pointers to answering case study questionsNewly authored chapters on classical realism, liberalism, and Marxism provide students with fresh perspectives on these theoriesNewly 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 fieldThe 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 startUpdated online resources include pointers on answering case study questions, supporting students to apply theories to real world issuesDigital Formats and ResourcesInternational Relations Theories is available for students and institutions to purchase in a variety of formats and is supported by online resources. The eBook offers a mobile experience and convenient access along with functionality tools, navigation features and links that offer extra learning support: Find the eBook on VitalSource.The digital version, available on Politics Trove, is also accompanied by online resources. These include:For studentsSelf-test questions for every section of the chapter, to help you test your knowledge as you goAuthor videos explaining concepts or going into greater depth into a case studyPointers on answering the case study questionsFor lecturersTest Bank for each chapterPowerPoint slides with a deck for each chapter to help build lecture materials