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

Context paragraphs:
Natural farming: Natural farming is an ecological farming approach established by Masanobu Fukuoka (1913–2008), a Japanese farmer and philosopher, introduced in his 1975 book "The One-Straw Revolution".  Fukuoka described his way of farming as (shizen nōhō) in Japanese.  It is also referred to as "the Fukuoka Method", "the natural way of farming" or "do-nothing farming".  The title refers not to lack of effort, but to the avoidance of manufactured inputs and equipment.  Natural farming is related to fertility farming, organic farming, sustainable agriculture, agroecology, agroforestry, ecoagriculture and permaculture, but should be distinguished from biodynamic agriculture.

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.

Against Our Will: Against Our Will: Men, Women and Rape is a 1975 book about rape by Susan Brownmiller, in which the author argues that rape is "a conscious process of intimidation by which all men keep all women in a state of fear."  Brownmiller's book is widely credited with changing public outlooks and attitudes about rape, but her arguments were rejected or criticized by sociobiologists, and others.

Knowledge and Politics: Knowledge and Politics is a 1975 book by philosopher and politician Roberto Mangabeira Unger.  In it, Unger criticizes classical liberal doctrine, which originated with European social theorists in the mid-17th century and continues to exercise a tight grip over contemporary thought, as an untenable system of ideas, resulting in contradictions in solving the problems that liberal doctrine itself identifies as fundamental to human experience.  Liberal doctrine, according to Unger, is an ideological prison-house that condemns people living under its spell to lives of resignation and disintegration.  In its place, Unger proposes an alternative to liberal doctrine that he calls the "theory of organic groups," elements of which he finds emergent in partial form in the welfare-corporate state and the socialist state.  The theory of organic groups, Unger contends, offers a way to overcome the divisions in human experience that make liberalism fatally flawed.  The theory of organic groups shows how to revise society so that all people can live in a way that is more hospitable to the flourishing of human nature as it is developing in history, particularly in allowing people to integrate their private and social natures, achieving a wholeness in life that has previously been limited to the experience of a small elite of geniuses and visionaries.

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.

Discipline and Punish: Discipline and Punish: The Birth of the Prison (French: "Surveiller et punir: Naissance de la prison" ) is a 1975 book by the French philosopher Michel Foucault.  It is an analysis of the social and theoretical mechanisms behind the changes that occurred in Western penal systems during the modern age based on historical documents from France.  Foucault argues that prison did not become the principal form of punishment just because of the humanitarian concerns of reformists.  He traces the cultural shifts that led to the predominance of prison via the body and power.  Prison used by the "disciplines" - new technological powers that can also be found, according to Foucault, in places such as schools, hospitals, and military barracks.

Susan Brownmiller: Susan Brownmiller (born February 15, 1935) is an American feminist journalist, author, and activist best known for her 1975 book "".  Brownmiller argues that rape had been previously defined by men rather than women, and that men use it as a means of perpetuating male dominance by keeping all women in a state of fear.  The New York Public Library selected "Against Our Will" as one of 100 most important books of the twentieth century.

Against Method: Against Method: Outline of an Anarchist Theory of Knowledge is a 1975 book about the philosophy of science by Paul Feyerabend, in which he argues that science is an anarchic enterprise, not a nomic (customary) one.  In the context of this work, the term anarchy refers to epistemological anarchy.

Did Jesus Exist? (Wells): Did Jesus Exist?  is a 1975 book written by the modern German historian George Albert Wells who speculated on the evidence of Jesus Christ.  Wells argues there was no historical evidence of Jesus existing.  A revised second edition was published in 1986.

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.

Supporting paragraphs: How Are We to Live? Peter Singer
Answer: "Animal Liberation"