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Is the ‘harm principle’, famously propounded by JS Mill and widely adopted in bioethics, an appropriate principle to guide public health regulation? The harm principle limits liberty-limiting interventions to only those instances where the person poses a significant risk of harm to others. However, much of public health regulation is not primarily directed to avert risk to others, but to safeguard the health and safety of the individual him or herself. Think about regulations regarding seatbelts, motorcycle helmets, or the fluoridation of water as illustrations of pervasive public health regulations that are primarily intended to safeguard the individual’s own health or safety. Even laws designed to reduce smoking are justified, at least in substantial part, by the reduction of risk to the smoker. Certainly, scholars argue that there are ‘other-regarding’ aspects to these kinds of laws, but there is little doubt that there are strong paternalistic features to these, and many other, public health laws, such as bans on trans fat in foods. This article directly and forcefully questions the Millian principle, making the case for hard paternalism. When seen from a population-based perspective that counts the number of lives saved, paternalism becomes a plausible justification for interventions that do not pose a truly significant burden on individual liberty, but go along way toward safeguarding the health and wellbeing of the populace.