The United Nations Women, Peace and Security (WPS) Agenda recognizes the interplay between sustainable peace, international security, and women's meaningful participation in decision-making processes. Against this background, the collective volume offers a comprehensive and forward-looking assessment of the WPS Agenda twenty-five years after the adoption of Security Council Resolution 1325(2000). Bringing together scholars, policymakers, diplomats and practitioners, the book examines the legal foundations, normative evolution, and patterns of implementation of the WPS Agenda across international, regional, and national levels. It critically analyses the extent to which the transformative aspirations of the WPS Agenda - sometimes described as a 'utopia' - have been implemented, while also identifying persistent structural and institutional constraints. Through a multidisciplinary and multilevel perspective, the volume reaffirms the enduring relevance of the WPS Agenda as a normative and operational framework for a gender-oriented international peace and security governance.