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The harm principle, articulated by John Stuart Mill, is a philosophical concept that defines the only legitimate reason for interfering with an individual's liberty. This principle states that individuals should be free to act as they wish, provided their actions do not cause harm to others. Interference is only justified for self-protection or to prevent harm to others, not for an individual's own good, which is considered a paternalistic overreach.1

This principle is a cornerstone of libertarianism, a political philosophy emphasizing individual liberty as the primary political value. Libertarians advocate for limited government intervention, allowing individuals the greatest freedom of action consistent with the equal freedom of others. Conversely, paternalism involves infringing on personal freedom with a beneficent intent, often seen as an infringement on autonomy.23

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