PART I. Perspectives on Interstate and Civil Strife.-- 1. War and rationality Bruce Bueno De Mesquita.-- 2. Emotions and War: an evolutionary model of motivation Rose McDermott.-- PART II. The Onset and termination of Civil Wars.-- 3. Evolution of theory on civil war and revolution T. David Mason.-- 4. Internal wars over the state : rational choice institutionalism and contentious politics Mark Irving Lichbach.-- 5. Democracy and civil war Nils Petter Gleditsch, Håvard Hegre, and Håvard Strand.-- 6. Civil war outcomes Roy Licklider.-- PART III. Ethnic Conflict, International Relations, and Genocide.-- 7. Origins of ethnic wars : a historical and critical account Monica Duffy Toft.-- 8. The international relations of ethnic conflict Stephen M. Saideman and Erin K. Jenne.-- 9. Genocide Studies : Large N, Small N, and policy specificity Manus I. Midlarsky.