International Security is one of the main sub-fields of International Relations. This four-volume collection will bring together seminal journal articles and some book chapters to map the main themes and turning points in the development of International Security Studies. Volume 1: Military-Political Security during the Cold War covers the traditional military-political security agenda from 1945 to the ending of the cold war. Volume 2: Military-Political Security since the Cold War reflects the perceived crisis of relevance in the whole strategic studies agenda and examines the responses to a radically different international political context. Volume 3: Widening the Agenda of International Security traces the broadening of traditional security concerns and shows how economic, environmental and societal security came onto the agenda of international security. Volume 4: Challenging State Security is about approaches that challenge state security including critical security studies, human security, feminism, and postmoderist/poststructualist approaches. Together the four volumes map the progress from the traditional security agenda to more contemporary challenges like terrorism. They serve to demonstrate the wide scope of the international security agenda today, as well as the wide range of methodologies and epistemologies used to approach the subject. Including an extensive overall introduction and part introductions by the Editors, this multi-volume set will be an essential purchase for all Political Science Libraries and Schools of International Relations.