This book offers the core conceptual base for the practice of T-Group facilitation. Drawing from the fields of psychology, social psychology, sociology, diversity studies and Indian philosophical thoughts, this book is a great resource for enhancing the practice of T-Group facilitation, for both budding and established facilitators. It covers a wide range of theories on human development, self-awareness, interpersonal interactions, groups and change. Individual and group identities, diversity, inclusion and social hierarchies are explored in detail here. The authors offer a model of T-Group facilitation based on 50 years of experience within the Indian Society for Applied Behavioural Science (ISABS). This model is useful not only for fellow practitioners of T-Groups but also for anyone engaged in facilitating groups, organizations and communities globally. This book helps one to reflect, develop and sharpen one's competencies, values and ethics in this field. The chapters are embedded with activities, quizzes, case studies and exercises to facilitate a deeper understanding of the various elements used in the book. This book will be of interest to students, teachers and practitioners of psychology, social psychology, management studies and organizational development. It will also be useful for T-Group facilitators, facilitators of experiential groups and related fields.