Chapter 1 - Conceptualising Non-State actors in International Relations.- Chapter 2 The power of institutions in IR: From intergovernmental to non-governmental organizations.- Chapter 3 - Irregular Militaries and Militias in International Relations Theory: The Case of Iraqi Shiite militias.- Chapter 4 - Dilemmas of fundamentalist non-state actors in international relations.- Chapter 5 - The impact of ethnic groups on International Relations.- Chapter...