Given that interstate rivalries are responsible for a disproportionate share of discord in world politics, this book sets out to explain just how these two-level rivalries really work. By reference to specific cases, specialists on Asian rivalries examine three related questions: what is the mix of internal (domestic politics) and external (interstate politics) stimuli in the dynamics of their rivalries; in what types of circumstances do domestic politics become the predominant influence on rivalry dynamics; when domestic politics become predominant, is their effect more likely to lead to the escalation or de-escalation of rivalry hostility? By pulling together the threads laid out by each contributor, the editors create a 'grounded theory' for interstate rivalries that breaks new ground in international relations theory.