Question: The philosopher that wrote How Are We to Live? is known for what 1975 book that argues in favor of vegetarianism?

full_context: Document 1: Mark Alan Walker: Mark Alan Walker, Ph.D. is an Associate Professor of Philosophy at New Mexico State University, where he occupies the Richard L. Hedden Endowed Chair in Advanced Philosophical Studies. Prior to his professorship at NMSU Prof. Walker taught at McMaster University in the department of philosophy and the Arts & Science Programme. He is the author of "Happy-People Pills for All" (Oxford: Blackwell Press, 2013). Walker founded and was president of the former nonprofit organization Permanent End International (2003–2007), which had been devoted to ending hunger, illiteracy and environmental degradation through the dissemination of modular aquaponics systems for farming. He serves on the editorial board of the Journal of Evolution and Technology and on the board of directors of the Institute for Ethics and Emerging Technologies. He is a former board member of the non-profit organization Humanity Plus (formerly World Transhumanist Association).
Document 2: Paul Taylor (philosopher): Paul W. Taylor (November 19, 1923 – October 14, 2015) was a philosopher best known for his work in the field of environmental ethics. His theory of biocentric egalitarianism, related to but not identical with deep ecology, was first published in his 1986 book "Respect for Nature", and is taught in university courses on environmental ethics.
Document 3: How Are We to Live?: How Are We to Live?: Ethics in an Age of Self-Interest is a book on applied ethics by bioethical philosopher Peter Singer. It was first published in 1993, with subsequent editions in later years. Singer argues that doing the right thing involves attending to the sufferings and preferences of other sentient beings.
Document 4: Biotic ethics: Biotic ethics (also called life-centered ethics) is a branch of ethics that values not only species and biospheres, but life itself. On this basis, biotic ethics defines a human purpose to secure and propagate life. These principles are related to bioethics, and to environmental ethics that seek to conserve existing species. However, biotic ethics value more generally organic gene/protein life itself, the structures and processes shared by all the biota. These processes result in self-propagation, an effective purpose that humans share with all life. Belonging to life then implies a human purpose to safeguard and propagate life. This purpose defines basic moral values: Acts that sustain life are good, and acts that destroy life are evil. Panbiotic ethics extends these principles to space, seeking to secure and expand life in the galaxy.
Document 5: Ingrid Newkirk: Ingrid E. Newkirk (born June 11, 1949) is an English-born British-American animal rights activist and the president of People for the Ethical Treatment of Animals (PETA), the world's largest animal rights organization. She is the author of several books, including "Making Kind Choices" (2005) and "The PETA Practical Guide to Animal Rights: Simple Acts of Kindness to Help Animals in Trouble" (2009).
Document 6: The Sovereignty of Good: The Sovereignty of Good is a book of moral philosophy by Iris Murdoch. First published in 1970, it comprises three previously published papers, all of which were originally delivered as lectures. Murdoch argued against the prevailing consensus in moral philosophy, proposing instead a Platonist approach. "The Sovereignty of Good" is Murdoch's best known philosophy book.
Document 7: The Human Condition (book): The Human Condition, first published in 1958, Hannah Arendt's account of how "human activities" should be and have been understood throughout Western history. Arendt is interested in the "vita activa" (active life) as contrasted with the "vita contemplativa" (contemplative life) and concerned that the debate over the relative status of the two has blinded us to important insights about the "vita activa" and the way in which it has changed since ancient times. She distinguishes three sorts of activity (labor, work, and action) and discusses how they have been affected by changes in Western history.
Document 8: Thomas Pogge: Thomas Winfried Menko Pogge ( ; born 13 August 1953) is a German philosopher and is the Director of the Global Justice Program and Leitner Professor of Philosophy and International Affairs at Yale University. In addition to his Yale appointment, he is the Research Director of the Centre for the Study of the Mind in Nature at the University of Oslo, a Professorial Research Fellow at the Centre for Applied Philosophy and Public Ethics at Charles Sturt University and Professor of Political Philosophy at the University of Central Lancashire's Centre for Professional Ethics. Pogge is also an editor for social and political philosophy for the Stanford Encyclopedia of Philosophy and a member of the Norwegian Academy of Science and Letters.
Document 9: Index of ethics articles: This Index of ethics articles puts articles relevant to well-known ethical (right and wrong, good and bad) debates and decisions in one place - including practical problems long known in philosophy, and the more abstract subjects in law, politics, and some professions and sciences. It lists also those core concepts essential to understanding ethics as applied in various religions, some movements derived from religions, and religions discussed as if they were a theory of ethics making no special claim to divine status.
Document 10: David Estlund: David Estlund is the Lombardo Family Professor of Philosophy at Brown University. He has been teaching moral and political philosophy at Brown since 1991. He previously taught at University of California, Irvine, and has spent fellowship years at the Program in Ethics at Harvard University and at Australian National University. His research interests center on liberalism, justice, and especially democracy. He sits on the editorial board of the academic journal "Representation". He is editor of the collection, Democracy (Blackwell, 2002) and the author of "" (Princeton, 2008). He is at work on a book to be called Utopophobia, on questions of realism and idealization in political philosophy.
Document 11: Alasdair Cochrane: Alasdair Cochrane (born 31 March 1978) is a British political theorist and ethicist who is currently a senior lecturer in political theory in the Department of Politics at the University of Sheffield. He is known for his work on animal rights from the perspective of political theory, which is the subject of his two books: "An Introduction to Animals and Political Theory" (2010, Palgrave Macmillan) and "Animal Rights Without Liberation" (2012, Columbia University Press). He is currently working on a third book. He is a founding member of the Centre for Animals and Social Justice, a UK-based think tank focussed on furthering the social and political status of nonhuman animals. He joined the Department at Sheffield in 2012, having previously been a faculty member at the Centre for the Study of Human Rights, London School of Economics.
Document 12: Gary Varner: Gary Edward Varner (born March 10, 1957) is an American philosopher specialising in environmental ethics, philosophical questions related to animal rights and animal welfare, and R. M. Hare's two-level utilitarianism. He is currently a professor in the Department of Philosophy at Texas A&M University, and has been based at the university since 1990. He was educated at Arizona State University, the University of Georgia and the University of Wisconsin–Madison; at Madison, where he was supervised by Jon Morline, he wrote one of the first doctoral theses on environmental ethics. Varner's first monograph was "In Nature's Interests?", which was published by Oxford University Press in 1998. In the book, Varner defended a form of biocentric individualism, according to which all living entities have morally considerable interests.
Document 13: Peter Boghossian: Peter Gregory Boghossian (born July 25, 1966) is an American philosopher and atheism advocate. He is Assistant Professor of Philosophy at Portland State University. His primary research areas are critical thinking, philosophy of education, and moral reasoning. Boghossian is a speaker for the Center for Inquiry, the Richard Dawkins Foundation for Reason and Science, and the Secular Student Alliance. He has been nominated as a member of the Global Secular Council.
Document 14: Peter Singer: Peter Albert David Singer, AC (born 6 July 1946) is an Australian moral philosopher. He is the Ira W. DeCamp Professor of Bioethics at Princeton University, and a Laureate Professor at the Centre for Applied Philosophy and Public Ethics at the University of Melbourne. He specializes in applied ethics and approaches ethical issues from a secular, utilitarian perspective. He is known in particular for his book "Animal Liberation" (1975), in which he argues in favor of vegetarianism, and his essay "Famine, Affluence, and Morality," in which he argues in favor of donating to help the global poor. For most of his career, he was a preference utilitarian, but he announced in "The Point of View of the Universe (2014)", coauthored with Katarzyna de Lazari-Radek, that he had become a hedonistic utilitarian.
Document 15: Animal Liberation (book): Animal Liberation: A New Ethics for Our Treatment of Animals is a 1975 book by Australian philosopher Peter Singer. It is widely considered within the animal liberation movement to be the founding philosophical statement of its ideas. Singer himself rejected the use of the theoretical framework of rights when it comes to human and nonhuman animals. Following Jeremy Bentham, Singer argued that the interests of animals should be considered because of their ability to experience suffering and that the idea of rights was not necessary in order to consider them. His ethical ideas fall under the umbrella of biocentrism. He popularized the term "speciesism" in the book, which had been coined by Richard D. Ryder to describe the exploitative treatment of animals.
ground_truth: "Animal Liberation"