This book addresses diversity counseling in a unique format that combines four non-ethnic minority groups: women, sexual minorities, older people, and people with disabilities. An historical overview of how both psychology and society have treated these four groups puts theories of discrimination in context. Chapters related to each of the four minority groups have been written by experts who have first-hand personal and professional exposure to the experiences and needs of members of each group. The final chapter discusses what mental health professions need to do in the future to adequately address the psychological needs for these four populations.