Some utilitarian writers aim to increase a sense of indeterminate guilt in their readers. Peter Singer is an example, and in his book Practical Ethics (New York: Cambridge University Press, 1980), he is evidently more interested in producing that effect than he is in the theoretical basis for it, which gets very cursory treatment. As moral persuasion, this kind of tactic is likely to be counterproductive and to lead to a defensive and resentful contraction of concern.
(Bernard Williams, Ethics and the Limits of Philosophy [Cambridge: Harvard University Press, 1985], 212)