Charles Garvin, PhD, AM, is Professor Emeritus of Social Work at the University of Michigan; author of many texts in social work, group work, and social justice in social work; author of over 50 articles and book chapters on these subjects; board member of International Association of Social Work with Groups; member of editorial boards of Social Work with Groups and Journal of Education in Social Work and Small Group Research.Richard M. Tolman, PhD, MSW, is Professor of Social Work at the University of Michigan. Dr. Tolman has been involved in research, teaching and group work practice for over 30 years. His work focuses primarily on preventing men's violence towards women.Mark Macgowan, PhD, MSW, is Professor and Coordinator of the Doctoral Program in Social Work at Florida International University. He is author of A Guide to Evidence-Based Group Work (Oxford) and co-editor of Evidence-Based Group Work in Community Settings (Taylor & Francis) and IASWG Standards for Social Work with Groups (Taylor & Francis). He serves on the editorial boards of several peer-reviewed group work journals and is an Executive Committee member of the International Association for Social Work with Groups. His clinical experience includes working with persons with substance use problems and those affected by traumatic events. teaching and group work practice for over 30 years. His work focuses primarily on preventing men's violence towards women.