“Moral Experts” first appeared in Analysis, vol. 32 (1972), pp. 115–117. “About Ethics” from Practical Ethics (Cambridge University Press, Cambridge, 2nd ed., 1993), pp. 1–14. “Preface to the 1975 Edition” from Animal Liberation (New York Review/Random House, New York, 1975), pp. vii-xiv. “All Animals Are Equal …” from Animal Liberation (New York Review/Random House, New York, 2nd ed., 1990), pp. 1–21. “Tools for Research” from Animal Liberation, 2nd ed., pp. 40–42, 45–47, 81–83, 85–86, 90–92, 94. “Down on the Factory Farm …” from Animal Liberation, 2nd ed., pp. 95–97, 129–136. “A Vegetarian Philosophy” from Consuming Passions: Food in the Age of Anxiety (Manchester University Press, Manchester, 1998), pp. 72–75, 77–80. Passages from “Bridging the Gap” have appeared in Rethinking Life and Death: The Collapse of Our Traditional Ethics (Text Publishing, Melbourne, 1994; St. Martin’s Press, New York, 1995) and in “The Rights of Ape,” BBC Wildlife, June 1993, pp. 28–32. “Environmental Values” from The Environmental Challenge (Lanman Cheshire, Melbourne, 1991), pp. 3–24. “Famine, Affluence, and Morality,” from Philosophy and Public Affairs (Spring 1972), vol. 1, pp. 229–243. “The Singer Solution to World Poverty” from The New York Times Magazine, September 5, 1999. “What’s Wrong with Killing?” from Practical Ethics, 2nd ed., pp. 83–109. “Taking Life: The Embryo and the Fetus” from Practical Ethics, 2nd ed., pp. 138–174. “Prologue” from Rethinking Life and Death, pp. 1–6. “Is the Sanctity of Life Ethic Terminally Ill?” from Bioethics vol. 9, no. 3, p. 4 (1995), pp. 327–343 and, in part, in Rethinking Life and Death. “Justifying Infanticide” from Practical Ethics, 2nd ed., pp. 181–191. “Justifying Voluntary Euthanasia” from Practical Ethics, 2nd ed., pp. 193–200. “Euthanasia: Emerging from Hitler’s Shadow” was delivered at the Third World Congress of the International Association of Bioethics, San Francisco, 1996. “In Place of the Old Ethic” from Rethinking Life and Death, pp. 187–222. “The Ultimate Choice” from How Are We to Live? (Text Publishing, Melbourne, 1993; Prometheus: Amherst, NY, 1995), pp. 1–20. “Living Ethically” from How Are We to Live? pp. 154–170. “The Good Life” from How Are We to Live? pp. 225–235. “Darwin for the Left” from Prospect, June 1998, pp. 26–30; portions of this essay also appear in A Darwinian Left (Weidenfeld and Nicolson, London, 1990; Yale University Press, New Haven, CT, 2000). “A Meaningful Life” from Ethics into Action: Henry Spira and the Animal Rights Movement (Rowman & Littlefield, Lanham, MD, 1998), chapter 6. “Animal Liberation: A Personal View” from Between the Species, vol. 2 (Summer 1986), pp. 148–154. “On Being Silenced in Germany” from The New York Review of Books, August 15, 1991. “An Interview” is excerpted from an interview aired on September 10, 1999, on WNET-TV and an interview that appeared in New Scientist, January 8, 2000.