'Debates over the appropriate relationship between the United Nations and regional arrangements are only going to intensify. This innovative new study analyzes the collaboration between the United Nations and the African Union concerning civilian protection in Darfur. It provides a sophisticated discussion of the many challenges that arise when the global organization is seen as illegitimate by the host government while the regional organization lacks the capabilities to carry out the robust peacekeeping required to protect civilians.' - Paul D. Williams, Elliott School of International Affairs, The George Washington University, USA.'Linnea Gelot explains convincingly how the AU benefitted from the UN’s international legitimacy for its AMIS mission in Darfur, and how the UN depended on the local and regional legitimacy of the AU for the successful transition of the Darfur mission to UNAMID. She finds that the mutual recognition of the tangible value derived from this legitimacy allowed the relationship between the UN and the AU to mature into a partnership. Gelot’s book tackles the complex links between legitimacy and power head-on and unmasks the important role collective legitimation plays in fostering regional-global relations.' - Cedric de Coning, Norwegian Institute of International Affairs, Norway.'Simply the best book available on the global-regional security partnership! Through an innovative lense of international legitimation, Gelot leads the way into the next generation of scholarly work on the much-discussed partnership between the United Nations and regional organizations.' - Fredrik Söderbaum, School of Global Studies, University of Gothenburg, Sweden.