Surveying the historical development and the present condition of utilitarian ethics, Geoffrey Scarre examines the major philosophers from Lao Tzu in the fifth century BC to Richard Hare in the twentieth. Utilitarianism traces the 'doctrine of utility' from the moralists of the ancient world, through the Enlightenment and Victorian utilitarianism up to the lively debate of the present day. Utilitarianism today faces challenges on several fronts: it cannot warrant the drawing of adequate protective boundaries around the essential interests of individuals, and it does not allow them the