Human Motives: Hedonism, Altruism, and the Science of Affect - Hardcoverby Peter Carruthers (Author) Motivational hedonism (often called "psychological hedonism") claims that everything we do is done in pursuit of pleasure (in the widest sense) and to avoid pain and displeasure (again, in the widest sense). Although perennially attractive, many philosophers and experimental psychologists have claimed to refute it. Human Motives shows how decision science and the recent science of affect can be used to construct a form of