Anton Leist is professor of philosophy at the Ethics-Center of the University of Zurich. His books include A Question of Life, Good Action, Ethics of Social Relationships, and Action in Context.Peter Singer is Ira W. DeCamp Professor of Bioethics in the University Center for Human Values at Princeton University and Laureate Professor at the University of Melbourne. His books include Animal Liberation, Practical Ethics, Rethinking Life and Death, One World, and The Life You Can Save.

Anton Leist is professor of philosophy at the Ethics-Center of the University of Zurich. His books include A Question of Life, Good Action, Ethics of Social Relationships, and Action in Context.Peter Singer is Ira W. DeCamp Professor of Bioethics in the University Center for Human Values at Princeton University and Laureate Professor at the University of Melbourne. His books include Animal Liberation, Practical Ethics, Rethinking Life and Death, One World, and The Life You Can Save.

Anton Leist is professor of philosophy at the Ethics-Center of the University of Zurich. His books include A Question of Life, Good Action, Ethics of Social Relationships, and Action in Context.Peter Singer is Ira W. DeCamp Professor of Bioethics in the University Center for Human Values at Princeton University and Laureate Professor at the University of Melbourne. His books include Animal Liberation, Practical Ethics, Rethinking Life and Death, One World, and The Life You Can Save.