Why do nations cooperate to ensure their security? Do they do so because it is in their national interest? Or do they do so because they place a value on cooperation as an end in itself? Are security regimes more enduring than security communities in providing a framework for regional order? The course reviews the major traditional and non-traditional security challenges to regional order in Southeast Asia. The course also critically evaluates contemporary security cooperation under the auspices of the ASEAN Regional Forum, the United States and other concerned countries. The course concludes with a crisis exercise in which participants role play.