Movements for social change could be more powerful if they had more class diversity--a factor that has limited their past size and clout. But attempting to cross class barriers has frequently left middle-class activists frustrated, with few resources to turn to for help. Based on interviews with 40 diverse activists and thinkers, Class Matters fills this gap by demystifying this taboo topic. A guide to building bridges across class lines and collaborating more effectively in mixed-class social change efforts, it is designed in lively, highly readable short "bites," full of stories, ideas, quotations, tips and resources. Economic justice activist Betsy Leondar-Wright is the communications director at United for a Fair Economy. She has worked in mixed-class movements for over 25 years.