Moral Skepticisms by Walter Sinnott-Armstrong (Professor of Philosophy and Hardy Professor of Legal Studies, Professor of Philosophy and Hardy Professor of Legal Studies, Dartmouth College)
Sinnott-Armstrong here provides an extensive survey of the difficult subject of moral beliefs. He covers theories that grapple with questions of morality such as naturalism, normativism, intuitionism, and coherentism. He then defends his own theory that he calls moderate moral skepticism, which is that moral beliefs can be justified, but not extremely justified.