In this interdisciplinary volume, renowned researchers examine how societal mechanisms and social support systems enable individuals to continue leading independent lives within their communities or in an institutional setting. Integrating sociological, psychological and health perspectives, the distinguished contributors address such topics as active life expectancy, mental health issues, social relationships, housing design, and institutional care. They describe how older adults' decision-making capacity is maintained by a variety of societal mechanisms, including formal support systems, cognitive training, and environmental supports.