The third edition of Introducing Medical Anthropology: A Discipline in Action, provides students with a first exposure to the growing field of medical and health anthropology. The narrative is guided by unifying themes. First, health-oriented anthropologists are very involved in the process of helping, to varying degrees, to change the world around them through their work in applied projects, policy initiatives, and advocacy. Second, the authors present the fundamental importance of culture and social relationships in health and illness by demonstrating that illness and disease involve complex biosocial processes and that resolving them requires attention to a range of factors beyond biology. Third, through an examination of the issue of health inequality, this book underlines the need for an analysis that moves beyond cultural or even ecological models of health toward a comprehensive biosocial approach. Such an approach integrates biological, cultural, and social factors in building unified theoretical understandings of the origin of ill health, while contributing to the building of effective and equitable national health-care systems. NEW TO THIS EDITION All chapters have been updated or expanded. NEW: Chapter 8, “The Biopolitics of Life: Biotechnology, Biocapital, and Bioethics.”•Revised text style for crisper language and livelier phrasing. Added a brief signposting of chapter content at the beginning of each chapter and reviewquestions about the key issues and concepts at the end of each chapter. Expanded discussion of Zika, Ebola, gender and health, PTSD and psychological anthropol-ogy, geriatric health, the contemporary vaccine controversy, the internet and health, and thehealth impacts of fracking and nuclear energy development. Concluding chapter examines anthropologically informed strategies and visions for a health-ier world.