This seminar examines deterrence and other strategies for responding to security threats, with a focus on how those strategies might be adapted to deal with the dangers posed by terrorism and WMD proliferation. The course will survey existing research on deterrence and various alternative policy tools such as coercive diplomacy, assurance, positive incentives, and soft power. It will introduce some of the latest thinking about whether these tools are useful for influencing actors away from support for terrorism or WMD acquisition or use.