Peter Singer is a highly influential philosopher, often credited with starting the modern animal rights movement and shaping the development of effective altruism. He is the author or editor of over 50 books, including Animal Liberation, Practical Ethics, and The Life You Can Save, which advocate for ethical treatment of animals and increased action to alleviate extreme poverty. In 2021, Singer received the Berggruen Prize for Philosophy and Culture, recognizing his revitalization of utilitarianism as both an academic philosophy and a force for global change.