1. Population, politics and policy.- 1.1. On Method.- 1.2. Population Policy.- 1.3. Migration.- 2. Population, power and the state.- 2.1. Total Population and the Power Inventory.- 2.2. Population Density, Social Organization and Power.- 2.3. Population, Production and the Dependency Burden.- 2.4. Population Optima.- 2.5. Population and Economic Development.- 2.6. Population and Power.- 3. Population and war.- 3.1. Population and the Causation of War.- 3.2. The Malthusian Explanation.- 3.3. Some Hypotheses on Population and War.- 3.4. Population Growth and Density, Resources and Subsistence: Man-Land Relationships and Their Relevance for the Study of War.- 3.5. Crowding, Social Pathology and Aggression.- 3.6. Population Growth, Domestic Conflict and War.- 3.7. Demographic Consequences of War.- 3.8. Human Losses and the Termination of Conflict.- 3.9. Conflict and Catastrophic Population Decline.- 3.10. The Causation of War: A Review of the Hypotheses.- 3.11. Does War Have a Demographic Function?.- 3.12. Population, Aggression and the State.- 4. Population, social morphology and international relations.- 4.1. The Regulation of Human Populations.- 4.2. The Perception of Population Trends.- 4.3. Population and Collective Action.- 4.4. Population and Future International Politics.- References.