David Boonin is a Professor of Philosophy at the University of Colorado. He is the author of Thomas Hobbes and the Science of Moral Virtue (1994) and the prize-winning books A Defense of Abortion (2002) and The Problem of Punishment (2009), all of which were published by Cambridge University Press. He is also the author of a number of articles on issues in applied ethics and the co-editor of the popular applied ethics textbook What's Wrong? (2009).