"Parfit is of a different temperament. ‘It would be a tragedy’ he tells us on page 2, ‘if there is no single true morality’. Well, outside the charmed walls of All Souls College, there actually are tragedies. Often the messy pluralities of conflicting moral demands—one might have said, the conflicting demands on human life itself—are part of the cause. Inside the charmed walls I fear that the tragedy is more like that of Ajax slaying sheep, or perhaps it is the comedy of Don Quixote tilting at windmills."

http://www.phil.cam.ac.uk/~swb24/reviews/Parfitfinal.htm