Journalists have bestowed on me the tag of “world’s most influential living philosopher.” They are probably thinking of my work on the ethics of our treatment of animals, often credited with starting the modern animal rights movement, and of the influence that my writing has had on the development of effective altruism. In 2021 I was delighted to receive the Berggruen Prize for Philosophy and Culture. The citation referred to my “widely influential and intellectually rigorous work in reinvigorating utilitarianism as part of academic philosophy and as a force for change in the world." The prize comes with $1 million which, in accordance with views I have been defending for many years, I am donating to the most effective organizations working to assist people in extreme poverty and to reduce the suffering of animals in factory farms.Several key figures in the animal movement have said that my book ANIMAL LIBERATION, first published in 1975, led them to get involved in the struggle to reduce the vast amount of suffering we inflict on animals. To that end, I co-founded the Australian Federation of Animal Societies, now Animals Australia, the country's largest and most effective animal advocacy organization. My wife, Renata, and I stopped eating meat in 1971.I am the Founder of The Life You Can Save (https://www.thelifeyoucansave.org/), an organization based on my book of the same name. It aims to spread my ideas about why we should be doing much more to improve the lives of people living in extreme poverty, and how we can best do this. My writings in this area include: the 1972 essay “Famine, Affluence, and Morality” in which I argue for donating to help the global poor; and two books that make the case for effective giving, The Life You Can Save (2009, revised edition 2019) and The Most Good You Can Do (2015).I have written, co-authored, edited or co-edited more than 50 books, including PRACTICAL ETHICS, THE EXPANDING CIRCLE, RETHINKING LIFE AND DEATH, ONE WORLD, THE ETHICS OF WHAT WE EAT(with Jim Mason) and THE POINT OF VIEW ON THE UNIVERSE (with Katarzyna de Lazari-Radek. My writings have appeared in more than 30 languages.