P. F. Strawson was one of the most important philosophers of the twentieth century, and his 1962 paper “Freedom and Resentment” is one of the most influential in modern moral philosophy, prompting responses across multiple disciplines, from psychology to sociology. In , Pamela Hieronymi closely reexamines Strawson’s paper and concludes that his argument has been underestimated and misunderstood. Line by line, Hieronymi carefully untangles the complex strands of Strawson’s ideas. After elucidating his conception of moral responsibility and his division between “reactive” and “objective” responses to the actions and attitudes of others, Hieronymi turns to his central argument. Strawson argues that, because determinism is an entirely general thesis, true of everyone at all times, its truth does not undermine moral responsibility. Hieronymi finds the two common interpretations of this argument, “the simple Humean interpretation” and “the broadly Wittgensteinian interpretation,” both deficient. Drawing on Strawson’s wider work in logic, philosophy of language, and metaphysics, Hieronymi concludes that his argument rests on an implicit, and previously overlooked, metaphysics of morals, one grounded in Strawson’s “social naturalism.” In the final chapter, she defends this naturalistic picture against objections. Rigorous, concise, and insightful, sheds new light on Strawson’s thinking and has profound implications for future work on free will, moral responsibility, and metaethics. The book also features the complete text of Strawson’s “Freedom and Resentment.”