A comprehensive and accessible introduction to international relations theories with a unique emphasis on positioning IR theories within their social, political, and historical contexts to help students fully understand IR theories and their influence. A comprehensive first introduction to international relations theories which encourages students to fully understand the purpose and function of IR theory. Readers are introduced to each IR theory and asked to consider the social, political, and historical context within which the theory emerged. Pedagogical features such as 'Think Critically' and 'Twisting the lens' provide the tools students need to apply IR theory to global issues. A comprehensive introduction to mainstream IR theories and critical approaches to IR, explained within the social, political, and historical context, to demonstrate that theory does not emerge from a vacuum. An expert authorial voice guides students through the required material in a gentle, reassuring pace, with an accessible and concise style, without shying away from the more complex theories and concepts. A clear and consistent structure and pedagogical framework of key terms, key concepts, key events, and key thinkers, to enable students with little or no knowledge of theory to develop a strong theoretical understanding, supported by easy-to-navigate points of reference. Critical reflection on new theoretical knowledge is encouraged by 'Think Critically' questions that are supported by hints and tips to guide avenues of thought. Opportunities to apply theory to today's events and issues and to practise using theory to analyse and interpret important societal concerns Available as an e-book enhanced with self-assessment activities and multi-media content to offer a fully immersive experience and extra learning support.