When should someone not be admitted to a group? How can a reluctant child be persuaded to participate in a group? What is the best way to deal with issues of low self-esteem? Part of the enduring appeal of this classic work is its vivid depiction of actual group work and the challenges that arise. Opening with an instructive survey of the roots and development of group social work -- from the first YMCA to the establishment of the NASW -- Northen and Kurland contribute to the integration of theory and research that forms the basis of group social work practice. Using an ecosystem approach, they set forth a generic framework for practice with diverse groups, establishing a common core of values, knowledge, purposes, and interventions that can be applied to different populations and situations. With clear step-by-step guidance, this book covers the major issues as well as the ethical challenges that working with groups entails. This fully revised and updated edition includes seven new chapters that reflect the most recent developments in group practice.