This book has three emphases: the exploration and clarification of (1) the foundation of the group in several disciplines and in the changing concepts of civilization, (2) the nature of various groups--theories, methods, problems, needed skills, and evaluation processes, and (3) leadership preparation and application of group process to the various aspects of life and work. Nine chapters are included: Group Issues and Possibilities Today, The Nature of the Small Group, Group Patterns, Group Process, The Leader, The Group Member, Special Problems in Interaction, Putting Group Process To Work, and Studying the Group. The book is planned for both lay and professional worker in the church, the school, and in social, business, and recreational organizations who are involved in the constructive development of persons through the group experience. The following premises provide a consistent basis for understanding the content: (1) The possibilities of group process for self-renewal are based on the potentialities and limitations of man himself; (2) The realization of these possibilities is directly related to man's openness to experience, knowledge, skills, and interest in becoming; (3) The concept of individual differences is basic to the provision of the optimal helping relationship; (4) Ability to participate and benefit from the group experience is a developmental process; (5) Group process enhances the potential for change in the perceptions and self-concepts of the members. (Author/CK)