Nancy Krieger is professor of social epidemiology in the Department of Social and Behavioral Sciences, the American Cancer Society Clinical Research Professor, and chair of the interdisciplinary concentration Women, Gender, and Health at Harvard T.H. Chan School of Public Health. She is a social epidemiologist, with a background in biochemistry, philosophy of science, and history of public health. Krieger’s research focuses on social inequalities in health, and as an activist she is engaged in issues around social justice, science, and health. She authored “Epidemiology and the People’s Health: Theory and Context,” and “Ecosocial Theory, Embodied Truths, and the People’s Health,” (Oxford University Press), and is the editor of Oxford’s Small Books, Big Ideas in Population Health series. She co-founded and chairs the Spirit of 1848 Caucus of the American Public Health Association, which is concerned with the links between social justice and public health.