This book reflects the current moves away from public health medicine to a multi-disciplinary approach to public health concerns and aims to explore the meaning of the 'new' public health within the current debates and policy changes that are reshaping the context for public health in the 21st century. Using case studies to link theory and practice and a wide range of public health material brought together for the first time under one cover, the book asks: . why is a multidisciplinary approach to public health important and where is it going in the future? . what is the nature of the new multidisciplinary public health? . which experts have a legitimate contribution to make to this multidisciplinary approach to public health? Analysing and reflecting upon the themes of public health history, theories, research and practice, Public Health for the 21st Century will engage advanced undergraduate and graduate students, trainees and practitioners across a broad range of disciplines associated with public health