Peter Singer is often described as the world’s most influential living philosopher. In 2005 Time magazine named him one of the 100 most influential people in the world, and in 2014 he was third on the Gottlieb Duttweiler Institute’s ranking of Global Thought Leaders. He is known especially for his work on the ethics of our treatment of animals, for his controversial critique of the sanctity of life ethics in bioethics, and for his writing on the obligations of the affluent to aid those living in extreme poverty. He first became well-known internationally after the publication of Animal Liberation in 1975. In 2011 Time included Animal Liberation on its “All-TIME” list of the 100 best nonfiction books published in English since the magazine began, in 1923. Singer has written, co-authored, edited or co-edited more than 40 books, including Practical Ethics; The Expanding Circle; How Are We to Live?, Rethinking Life and Death, The Ethics of What We Eat (with Jim Mason), The Life You Can Save, The Point of View of the Universe (with Katarzyna de Lazari-Radek), and, most recently, The Most Good You Can Do. His works have appeared in more than 25 languages. Peter Singer was born in Melbourne, Australia, in 1946, and educated at the University of Melbourne and the University of Oxford. After teaching in England, the United States and Australia, he has, since 1999, been Ira W. DeCamp Professor of Bioethics in the University Center for Human Values at Princeton University. Since 2005 he has combined that position with the position of Laureate Professor at the University of Melbourne, in the School of Historical and Philosophical Studies. He is married, with three daughters and four grandchildren. His recreations include hiking and surfing. In 2012 he was made a Companion of the Order of Australia, the nation’s highest civic honour.