The rationale for this book follows Michel Foucault’s approach of problematization, addressing the way lifestyle is problematized as a biopolitical domain in neoliberal societies. Mayes argues that in response to the threat of obesity, lifestyle has emerged as a network of disparate knowledges, relations and practices through which individuals are governed toward the security of the population’s health. Although a central focus is government health campaigns, this volume demonstrates that the network of lifestyle emanates from a variety of overlapping domains and disciplines, including public health, clinical medicine, media, entertainment, school programs, advertising, sociology and ethics. This book offers a timely critique of the continued interventions into the lives of individuals and communities by government agencies, private industries, medical and non-medical experts in the name of health and population security and will be of interests to students and scholars of critical international relations theory, health and bioethics and governmentality studies.