There are various ways of attempting to defend an extreme liberal view on abortion, according to which a woman always has the right to control what happens inside her own body. First of all, there is the popular view that appeals to the idea that there is a fundamental, underived right that women have to control what occurs within their own bodies. Secondly, there is a related type of philosophical argument advanced by Judith Jarvis Thomson in her famous and oft-reprinted (...) article “A Defense of Abortion” for the slightly weaker claim that while abortion is not always permissible, since, as she says near the end of her essay, it is impermissible in, and only in, the following circumstances: “There may well be cases where carrying the child to term requires only Minimally Decent Samaritanism of the mother, and this is a standard w must not fall below.” Subsequently, Thomson’s type of argument was then developed and defended at much greater length by David Boonin in his very carefully argued book A Defense of Abortion, though Boonin does not discuss the case of the Minimally Decent Samaritan. I believe that there is a strong objection to the Thomson/Boonin approach to justifying abortion. It was set out in an article by Richard Langer, namely, in ‘Silverstein and the “Responsibility Objection”’, Social Theory and Practice 19/3. 345-58. Langer’s discussion is not, in general, very strong, but in a very important paragraph, on pages 351-2, Langer argues that if the responsibility objection to Thomson is unsound, then it follows that there will also be circumstances in which allowing one’s children to die, simply because one no longer wishes to care for them, will also be morally permissible. David Boonin replies to Langer’s objection in his A Defense of Abortion, but in discussing, on pages 182-3, Langer’s point about a parent’s responsibility to his or her children, Boonin relies upon a tacit consent argument that appears open to decisive objections. It seems to me, then, that the only possibility for a successful defense of an extreme liberal view concerning the justification of abortion will have to involve setting out a plausible account of what it is that gives something a right to life, and I think that the right answer is that neo-Lockean persons, and only neo-Lockean persons, have a right to continued existence. This leaves one with the scientific question of when developing humans become neo-Lockean persons. The answer to that question is perhaps still not firmly settled, although the extensive research that I carried out back in the 1970s seemed to me to support the conclusion that it is not until sometime that humans acquire the capacity for thought, a capacity that is necessary if a developing human is to be a neo-Lockean person. The upshot is that if one defends an extreme liberal view on abortion in the only way that seems to be satisfactory – that is, by setting out an account of what it is that gives something a right to life, and arguing that humans before birth do not have the relevant property, one must also address the question of infanticide, and that to fail to do so is intellectually unacceptable. (shrink)

The concept of potentiality is often invoked in debate over the moral status of human embryos. It has also been invoked, though less prominently, in debate over the moral status of anencephalic infants, individuals in permanent vegetative state, and the whole-brain dead. In this paper, I examine some of the theoretical assumptions underlying the concept of potentiality invoked in these debates. I show how parties in the debate over the ethical significance of potentiality have been talking past each other to (...) a large extent because they rely on different concepts of potentiality. The conceptual differences are traced to different assumptions about the nature of persons and whether external factors may affect determinations of possibility and therefore potentiality. Any assessment about the ethical significance of potentiality therefore requires an evaluation of alternative concepts personhood and the connection between possibility and potentiality. (shrink)