Many Christians believe abortion is morally justified in cases of rape and incest – what I call “pro-life with a footnote.” I spoke extensively on this in part 16 (episode 23) of my podcast series on abortion, but wanted to say a bit more about this here.

This position fails to understand the logic of the pro-life position. We are opposed to abortion because the act of abortion (1) unjustly (2) takes the life of an (3) innocent, (4) valuable (5) human being. All five of these points are still true when a baby is conceived via rape or incest. The circumstances under which a human being is conceived does not change what is conceived, so the unborn is still human, still valuable, and still innocent even if he was conceived by an act of moral violence. Abortion would still take the life of the human conceived under such circumstances in the same manner it takes the life of humans conceived under other circumstances. As such, it would still be unjust to kill the baby conceived by rape or incest. Pro-lifers are opposed to murdering all innocent, valuable, human beings no matter how they came into being, and thus pro-lifers ought to be opposed to abortion under all circumstances.

Those who believe abortion is morally justified in cases of rape and incest are not only abandoning the logic of the pro-life view, but they are also giving pro-abortion advocates an open door to argue for abortion rights. Here’s why. Once you admit that there are some circumstances under which it is morally permissible to kill innocent, valuable, human beings, then why, in principle, could it not be morally permissible to do so in other circumstances as well. This is particularly the case when the reason why you think abortion is morally justified in cases of rape and incest is because of the emotional hardship of the mother. If one form of emotional hardship justifies abortion, why not others?

Does not a mother experience emotional hardship at the prospect of an unwanted pregnancy? Don’t financial concerns and relationship concerns cause emotional hardship? Who are you to say that one form of emotional hardship justifies abortion but another does not? The pro-lifer will have a hard time explaining why one is justified but the other is not for the simple reason that his allowance for abortion in cases of rape and incest is not a principled exception. It is based on emotion, not reason. If abortion takes the life of an innocent human being, then there is no justification for abortion, period. It makes no more sense to talk about morally permissible abortions than it does to talk about morally permissible slavery. It makes no more sense to talk about morally permissible abortions than it does morally permissible infanticide. Can you imagine if we said we are opposed to killing two year-olds except in cases of X, Y, and Z? People would think we are morally insane, and for good reason. There can be no exception. Killing any two year-old is morally evil, period. Likewise, every abortion is a morally unjustified act of murder. We ought to be opposed to killing valuable, innocent children under all circumstances.