Most early approaches to encouraging social development focused on economic and technical issues. This volume begins from the premise that economic and technical patterns are embedded in cultural patterns. These patterns of custom and belief are sometimes elaborate, and they can act as barriers to technical or economic change. This volume presents case studies of social change, developing a model for analysis and action. An analytic guide is presented for each case history, and the editor points out factors that influenced the outcome of the project. The volume ais designed for people in the field, and is intended to be of practical usefulness.