Book excerpt: This volume explores the foundations of trust, and whether social and political trust have common roots. Contributions by noted scholars examine how we measure trust, the cultural and social psychological roots of trust, the foundations of political trust, and how trust concerns the law, the economy, elections, international relations, corruption, and cooperation, among myriad societal factors. The rich assortment of essays on these themes addresses questions such as: How does national identity shape trust, and how does trust form in developing countries and in new democracies? Are minority groups less trusting than the dominant group in a society? Do immigrants adapt to the trust levels of their host countries? Does group interaction build trust? Does the welfare state promote trust and, in turn, does trust lead to greater well-being and to better health outcomes? The Oxford Handbook of Social and Political Trust considers these and other questions of critical importance for current scholarly investigations of trust.