Once again, this is according to Google Scholar, rounded to the nearest 100. Email me with corrections and omissions. I list only those with at least 3,000 citations, and exclude works of applied ethics. I could not find any results for Harman’s The Nature of Morality on Google Scholar, but I imagine it would make this list.
- Alasdair MacIntyre, After Virtue, 37,800
- Derek Parfit, Reasons and Persons, 17,900
- John Stuart Mill, Utilitarianism, 14,300
- G.E. Moore, Principia Ethica, 12,100
- T.M. Scanlon, What We Owe to Each Other, 10,600
- Bernard Williams, Ethics and the Limits of Philosophy, 10,200
- Martha Nussbaum, The Fragility of Goodness, 8,800
- J.L. Mackie, Ethics: Inventing Right and Wrong, 8,500
- Henry Sidgwick, The Methods of Ethics, 7,800
- W.D. Ross, The Right and the Good, 7,500
- Virginia Held, The Ethics of Care, 6,500
- Alasdair MacIntyre, Whose Justice? Which Rationality?, 6,500
- Christine Korsgaard, The Sources of Normativity, 6,400
- R.M. Hare, The Language of Morals, 6,000
- Iris Murdoch, The Sovereignty of Good, 5,200
- Michael Smith, The Moral Problem, 4,400
- Allan Gibbard, Wise Choices, Apt Feelings, 4,200
- R.M. Hare, Moral Thinking: Its Levels, Method and Point, 4,100
- Joseph Raz, Practical Reason and Norms, 4,100
- Thomas Nagel, The Possibility of Altruism, 4,000
- Ronald Dworkin, Justice for Hedgehogs, 3,800
- Derek Parfit, On What Matters, 3,300
- Stephen Darwall, The Second-Person Standpoint, 3,200
- R.M. Hare, Freedom and Reason, 3,200
- Philippa Foot, Virtues and Vices, 3,100
- Charles Stevenson, Ethics and Language, 3,100
- David Brink, Moral Realism and the Foundations of Ethics, 3,000
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