One of the most controversial and influential philosophers alive today, Peter Singer is DeCamp Professor of Bioethics at Princeton University, and laureate professor at the Centre for Applied Philosophy and Public Ethics, University of Melbourne. He writes a regular column for Free Inquiry magazine, and is the author of dozens of books, including Practical Ethics, Rethinking Life and Death, Animal Liberation, and Writings on an Ethical Life. In this conversation with D.J. Grothe, Peter Singer explores how controversial or compatible his views are with religious thought and in what sense his ethics is informed by a naturalistic or Darwinian understanding of the origins of life. He discusses the value of human life as regards end-of-life questions such as doctor-assisted suicide, and offers justification for the involuntary euthanasia of severely disabled infants. He details what it means to be genuinely "pro-life." And he shares his views on stem cell research and abortion, arguing how that even though abortion is killing a human life, it is not unethical. He also explains what qualities of life would make killing it unethical.