For Adam Smith, resentment is the natural passion we feel at experiencing or witnessing injustice and the basis for our natural sense of justice. Why does Smith restrict justifiable resentment to injustice given his seeming admission that we do naturally feel resentment beyond the case of injury? Smith never directly addresses why such resentments are inappropriate in The Theory of Moral Sentiments; we reconstruct a response drawn from his moral psychology. First, we explain the origins of Smith’s narrow view of justice. We then turn to Smith’s account of resentment, explaining its purpose as the natural motive for narrow justice, questioning the split between descriptive and normative resentment. We ultimately argue that resentment’s logical tie to punishment for Smith is necessary but insufficient, and that injury and resentment are separate conditions required to justify punishment. Finally, we reconstruct Smith’s normative justifications for severing the tie between improper resentments and punishment, driven by his claims about equal status and about sociability.