In this work, Jamie Mayerfeld undertakes a careful inquiry into the meaning and moral significance of suffering. Understanding suffering in hedonistic terms as an affliction of feeling, he claims that it is an objective psychological condition, amenable to measurement and interpersonal comparison, although its accurate assessment is never easy. Mayerfeld goes on to examine the content of the duty to prevent suffering and the weight it has relative to other moral considerations. He argues that the prevention of suffering is morally more important than the promotion of happiness, and that the duty to relieve suffering is much stronger than most of us acknowledge.