Trust and social capital have gained significant importance over the last 40 years as both areas of research and professional practice, becoming key concepts in the analysis of relationships in organizations and critical to organizations′ effectiveness. As research has grown in these areas, literature on trust and social capital has become highly disparate: international in orientation; multi-level in focus, ranging from the individual to the workgroup, within and between organizations; and dual-focused on fundamental research issues and best practice. The editors of this four-volume set, with the aid of an international advisory board, bring together the seminal texts in the field to cover the scope of trust and social capital as a discipline, its historical development over the last 40 years and its spread across many countries.