What is Moral Progress? - äänikirja
Peter Singer is Professor of Bioethics in the University Center for Human Values at Princeton University. He's the author of Animal Liberation, The Most Good You Can Do, and many other books. His most recent book is Ethics in the Real World. He is also the co-founder of The Life You Can Save, a nonprofit devoted to spreading his ideas about why we should be doing much more to improve the lives of people living in extreme poverty.