This book conceptualizes Responsibility to Protect doctrine (R2P) as part of a global cosmopolitan agenda, drawing on the work of Jürgen Habermas, and argues that R2P is reflective of a shift towards a more cosmopolitan approach to human protection. The author also proposes a framework of analysis that includes a strong legal dimension in order to advance reforms to the international legal, political and military structures in order to better prevent humanitarian crises and protect civilians in times of conflict. The volume explores the cosmopolitan, moral and legal progress that has occurred—and could yet occur—under R2P as the approach to human protection transitions in the Post-Cold War era.