This was a difficult book to write for two reasons. One is that the subject with which it is concerned raises a number of philosophical questions that have no simple answers. In this sense, writing the book was intellectually difficult. It is, of course, a commonplace to observe that the moral problem of abortion is a difficult one. But it is a platitude that nonetheless merits repeating: Even though people say it all the time, relatively few people seem actually to believe it. Opponents of abortion typically seem to believe that the matter is fairly clear-cut: The fetus is a human being, killing human beings is morally wrong, abortion causes the death of the fetus, therefore abortion is morally wrong. And supporters of abortion often seem to treat the matter as equally simple: It's the woman's body, so it's her choice. This book grew out of a course on the ethics of abortion that I first offered at Tulane University in the fall of 1995, and if there is one thing that I learned from teaching that course, it is that the moral problem of abortion is every bit as complicated as the platitude would suggest.

The other reason that this book was difficult to write is more personal. On the desk in my office where most of this book was written and revised, there are several pictures of my son, Eli.