Peter Singer is a moral philosopher whose work addresses altruism, human and animal rights, economics, world poverty, and religion. He is a professor of bioethics at Princeton University, and a laureate professor at the Centre for Applied Philosophy and Public Ethics at the University of Melbourne, Australia. Singer has authored and co-authored many books, including The Most Good You Can Do: How Effective Altruism Is Changing Ideas About Living Ethically, and the seminal Animal Liberation: A New Ethics for our Treatment of Animals.