This edition of Utilitarianism supplements the text of Mill's classic essay with 58 related remarks carefully selected from Mill's other writings, ranging from his treatise on logic to his personal correspondence. In these remarks, Mill comments on specific passages of Utilitarianism, elaborates on topics he handles briefly in Utilitarianism, and discusses additional aspects of his moral thought.

Short introductory comments accompany the related remarks, and an editor's introduction provides an overview of Utilitarianism crafted specifically to enhance accessibility for first-time readers of the essay.