Prevention of Major Depression: A Global Priority -- The Framework for Prevention -- Social and Behavioral Risk Factors for Late-life Depression -- Prevention of Depression in Medical Conditions -- Vascular Depression and the Role of Neuroimaging and Biomarkers -- Measurement and Assessment in Late-life Depression -- Applications I: Indicated Prevention -- Applications II: Selective and Universal Prevention of Late-life Depression -- Health Policy and Economic Aspects of Late-life Depression Prevention -- Depression among Blacks during Late Life: Examining Within Group Variations -- Global Priorities and Possibilities.