This innovative volume applies cutting-edge critical theories—including feminist, queer and human security perspectives—to analyse NATO's evolving role as a security and defence institution. Moving beyond traditional problem-solving approaches, it features diverse international contributors and employs a comprehensive methodological toolkit from discourse analysis to creative research methods. It also reveals how social, political and geopolitical forces shape NATO whilst examining its transformative impact on global affairs. Essential reading for scholars and practitioners of international relations, security studies and critical theory, this collection offers fresh insights into one of the world's most influential political-military alliances through an inclusive, multi-perspective lens.