This book confirms the idea put forth nearly a century and a half ago by Alexis de Tocqueville, that American democracy is rooted in civic voluntarism--citizens' involvement in family, work, school, and religion, as well as in their political participation as voters, campaigners, protesters, or community activists.

The authors analyze civic activity as none have before. They have created an original survey of 15,000 individuals, which includes 2,500 personal interviews, that focuses on the central issues of involvement: how people come to be active, their motivations, their...