In late 2014, the National Association of County and City Health Officials (NACCHO) published a book called Expanding the Boundaries, Health Equity and Public Health Practice. Aimed at creating discussion and facilitating change, the book explores the ways in which public health practitioners might act on the underlying social inequalities that are the root of health inequities. Revolutionary and hopeful, it provides both overarching theory and practical ideas for moving public health work upstream, to successfully address causes and not consequences.