Essentials of Public Health Ethics introduces students to the field of public health ethics, by focusing on cases. Topics span the discipline of public health and integrate materials, concepts, and frameworks from numerous fields in public health, such as health promotion, environmental health and health policy. By delving into both historical and contemporary cases, including international cases, the authors investigate the evolution and impact of various understandings of the concept of “the public” over time, i.e., the public not only as a numerical population that can be defined and measured, but also as a political group with legally defined obligations and relationships, as well as diverse cultural and moral understandings.