Acknowledgments. I. Introduction. II. The Primary Groups and Politics. III. Experiments and the Political 1. The Culture of the Laboratory. IV. Experiments and the Political 2: Bridging the Gap. V. The Concept of Leadership. VI. Affective and Instrumental, 1. VII. Affective and Instrumental, 2. VIII. Leadership and the Norms of the Group. IX. The Participation Hypothesis, 1: Application of a Small Group Finding. X. The Participation Hypothesis, 2: The Generality of a Small Group Finding. XI. A Concluding Note. Bibliography. Index.Originally published in 1961.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.