Peter Singer is a renowned Australian philosopher and bioethicist known for his influential work in ethics, particularly in the areas of animal rights and effective altruism. Born in 1946, Singer is perhaps best known for his book "Animal Liberation," which challenged traditional views on the moral status of animals and catalyzed the modern animal rights movement. A professor at Princeton University and the University of Melbourne, Singer has contributed extensively to discussions on global poverty, utilitarian ethics, and public health. His thought-provoking writing and lectures continue to inspire and provoke debate, establishing him as a pivotal figure in contemporary ethical discourse.