Georges Vigarello maps the evolution of Western ideas about fat and fat people from the Middle Ages to the present, paying particular attention to the role of science, fashion, fitness crazes, and public health campaigns in shaping these views. While hefty bodies were once a sign of power, today those who struggle to lose weight are considered poor in character and weak in mind. Vigarello traces the eventual equation of fatness with infirmity and the way we have come to define ourselves and others in terms of body type.