The Handbook is divided into four sections which examine, in turn, the emergence, evolution, and forms of security governance as well as the theoretical orientations that have so far dominated the literature (networks, multilateralism, regimes, and systems); the varieties and nature of security governance in eight discrete geostrategic regions; nine dimensions of governance that have been securitized in the post-Cold War period; and lastly the role of specific institutions in their regional context.