Approximately 50 years have passed since Judith Jarvis Thomson wrote A Defense of Abortion (1971). Her article has significantly shaped the philosophical literature on abortion. In this paper, I will summarize some of the interesting and important work done on the topic since Thomson's article. I will highlight Thomson as a defender of the claim that abortion is morally permissible and Don Marquis as an influential opponent of that claim. I will start by articulating Thomson's case, focusing on the violinist (...) analogy. I will underscore key questions, concepts, and objections the analogy raises. I will then examine briefly how philosophers have addressed some of these issues. Next, I will outline Marquis’ work, provide a similar commentary on it, and discuss some of its main responses. I will then survey other philosophers who have addressed abortion beyond the scope of providing specific replies to Thomson or Marquis. I will close by highlighting significant points of agreement and disagreement in the literature, as well as crucial gaps in the current research. The paper is not an attempt to address every work on the topic over the last five decades, nor is it aimed at taking a position on the moral permissibility of abortion. My goal is to provide an overview of the dialectic. (shrink)

Singer’s ‘Practical Ethics’ is based on a form of utilitarianism which takes into account the interests of a living being if and only if it displays a minimum of rationality and (self-)consciousness. Accordingly aborting a human fetus in an early stage of development is held to be morally acceptable, whereas killing chicken, pigs, and cattle for mere culinary pleasure is not. Singer's view on abortion are refuted because they only consider the actual properties of the fetus but ignore the quality (...) of its future life. In general the ‘principle of replaceability’ must be rejected. And although making animais suffer certainly is immoral, mere (painless) killing does not necessarily do so great a harm to them that we have to become vegetarians. (shrink)

Re-Reading: Judith Jarvis Thompson, 'A Defense of Abortion'.

Most believe that it is worse for a person to die than to continue to exist with a good life. At the same time, many believe that it is not worse for a merely possible person never to exist than to exist with a good life. I argue that if the underlying properties that make us the sort of thing we essentially are can come in small degrees, then to maintain this commonly-held pair of beliefs we will have to embrace (...) an implausible sort of evaluative hypersensitivity to slight nonevaluative differences. Avoidance of such hypersensitivity pressures us to accept that it can be worse for merely possible people never to exist. If this conclusion is correct, then the standard basis for giving no or less priority to merely possible persons would disappear (i.e., that things cannot be better or worse for them). Though defenders of Person-Affecting Views and their opponents may still disagree in theory, they could arrive at the same answers to many monumentally important practical questions. (shrink)

This paper develops a form of moral actualism that can explain the procreative asymmetry. Along the way, it defends and explains the attractive asymmetry: the claim that although an impermissible option can be self-conditionally permissible, a permissible option cannot be self-conditionally impermissible.

Non-Identity arguments have a pervasive but sometimes counter-intuitive grip on certain key areas in ethics. As a result, there has been limited success in supporting the alternative view that our choices concerning future generations can be considered harmful on any sort of person-affecting principle. However, as the Non-Identity Problem relies overtly on certain metaphysical assumptions, plausible alternatives to these foundations can substantially undermine the Non-Identity argument itself. In this paper, I show how the pervasive force and nature of Non-Identity arguments (...) rely upon a specific adoption of a theory of modality and identity and how adopting an alternative account of modality can be used to reject many conclusions formed through Non-Identity type arguments. By using Lewis’s counterpart-theoretic account to understand ways we might have been, I outline the basis of a modal account of harm that incorporates a person-affecting aspect. This, in turn, has significant implications for ethical decision-making in areas such as reproductive choice and the welfare of future generations. (shrink)

I argue that gensler's claims (in "philosophical studies" 48:57-72 and 49:83-98) about abortion are unsound. In addition, His argument is not a kantian consistency argument as he claims, But consequentialism in disguise.

By a potential person I shall mean an entity which is not now a person but which is capable of developing into a person, given certain biologically and/or technologically possible conditions. This is admittedly a narrower sense than some would attach to the term ‘potential'. After all, people of the twenty-fifth century, if such there will be, are in some sense potential people now, even though the specific biological entities from which they will develop, i.e. the particular gametes or concepti, (...) do not yet exist. For there do exist, in the reproductive capacities of people now living and in the earth's resources, conditions adequate to produce these future people eventually, provided of course that various possible catastrophes are avoided. Indeed, in some sense of ‘potential’ there have been countless billions of potential people from the beginning of time. But I am concerned not with such remote potentialities but with currently existing entities that are capable of developing into people. (shrink)

In this commentary, we take up Jennifer Blumenthal-Barby’s (2024) important argument to depart from claims about personhood in bioethics. First, we want to extend Blumenthal-Barby’s critique of the...

Many people have moral qualms about embryo research, feeling that embryos must deserve some kind of protection, if not so much as is afforded to persons. This paper will show that these qualms serve to camouflage motives that are really prudential, at the cost of also obscuring the real ethical issues at play in the debate concerning embryo research and therapeutic cloning. This in turn leads to fallacious use of the Actions/Omissions Distinction and ultimately neglects the duties that we have (...) towards future persons. (shrink)

How can we resist the repugnant conclusion? James Griffin has plausibly suggested that part way through the sequence we may reach a world—let us call it “J”—in which the lives are lexically superior to those that follow. If it would be preferable to live a single life in J than through any number of lives in the next one, then it would be strange to judge K the better world. Instead, we may reasonably “suspend addition” and judge J superior, as (...) if aggregating the lives in the larger world intrapersonally. I argue that the addition of new people with separate preferences renders this inference illicit when comparing J+ and K. When one pairwise comparison suspends addition and the other does not, the result is an intransitive value judgement: J < J+ < K < J, producing the mere addition paradox. (shrink)

Can it be better or worse for a person to exist than not to exist at all? This old and challenging existential question has been raised anew in contemporary moral philosophy, mainly for two reasons. First, traditional “impersonal” ethical theories, such as utilitarianism, have counterintuitive implications in population ethics, for example, the repugnant conclusion. Second, it has seemed evident to many that an outcome can be better than another only if it is better for someone, and that only moral theories (...) that are in this sense “person affecting” can be correct. The implications of this Person-Affecting Restriction will differ radically, however, depending on which answer one gives to the existential question. The negative answer, which we argue against, would make the restriction quite untenable. Hence, many of the problems regarding our moral duties to future generations turn around the issue at hand. (shrink)

The debate concerning abortion abounds in miraculous narratives. Judith Jarvis Thomson has contrived the most celebrated set among related ones, to wit the “violinist analogy,” the “Good Samaritan” narrative, and the “Henry Fonda” allegory, by virtue of which, she intends, on the one hand, to argue that women’s right to autonomy outweighs the alleged fetus’s right to life, and on the other, to prove that no positive moral duties can be derived towards other persons alone from the fact that a (...) moral agent is ascribed certain rights. What this short paper endeavors to prove is that Thomson’s argumentation by analogy is a weak one, since neither the number nor the relevance of similarities invoked is adequate or satisfactory, while crucial parameters concerning the morality of abortion are being totally overlooked. (shrink)

This article casts light on the moral implications of the possibility of human extinction, with a specific focus on extinction caused by an interruption in human reproduction. In the first two paragraphs, I show that moral philosophy has not yet given promising explanations for the wrongness of this kind of extinction. Specifically, the second paragraph contains a detailed rejection of John Leslie’s main claims on the morality of extinction. In the third paragraph, I offer a demonstration of the fact that (...) a moral view which stresses the permissibility of some types of human extinction can be effectively constructed, while in the following paragraph I propose a prima facie defense of a new approach to the topic which is likely to provide us with reasons in favor of the wrongness of a premature departure of humankind. (shrink)

Referred to as “a foundational concept” of bioethics, personhood has long figured prominently in discussions of entities’ moral status and attendant rights and duties (Farah and Heberlein 2007, 39)...

According to Singer, it is not directly wrong to kill 'non-self-conscious beings', such as lower animals, human foetuses and newborn infants, provided that any consequent loss of happiness is made good by the creation of new sentient life. In contrast, normal adult humans, being 'self-conscious', generally have a strong preference for going on living, the flouting of which cannot, Singer argues, be morally counterbalanced by creating new, equally happy individuals. Singer's case might be reinforced by taking account, not only of (...) the preference for continued life itself, but also of other preferences for whose satisfaction continued life is essential. It proves difficult, however, to find a formulation of 'preference utilitarianism' which, while lacking other obviously unacceptable consequences, supports Singer's 'non-replaceability principle'. Also, Singer's position fails adequately to accommodate our conviction that the lives of human beings are, in general, more valuable than those of other animals. Finally, his thesis that lower animals (let alone human infants) are replaceable, has decidely counterintuitive implications. (shrink)

Medical stem cell research is currently the cause of much moral controversy. Those who would confer the same moral status to embryos as we do to humans consider that harvesting such embryonic cells entails sacrificing embryos. In this paper, the author analyses critically the arguments given for such a perspective. Finally, a theory of moral status is outlined that coherently and plausibly supports the use of embryonic stem cells in therapeutic research.

This report explores the relationship between philosophy and medicine in the U.K. We note that medical training involves very little formal instruction in philosophy and ethics, and that, with few exceptions, philosophers in the U.K. do not contribute to the instruction of physicians or the philosophy of medicine. However, reviewing the problems arising out of recent developments within scientific medicine we find a pressing need for future philosophical analysis in the following areas: psychiatry, organ transplantation, abortion, euthanasia, experiments on living (...) subjects, consent, confidentiality, the relationship between medicine and political authority, and the provisions for social justice in medicine. (shrink)

Most Act-Utilitarians, including Singer are Permissivists who claim that their theory usually permits abortion. In contrast, a minority, including Hare and Tännsjö, are Restrictionists who assert that Act-Utilitarianism usually limits abortion. I argue that both Permissivists and Restrictionists have misunderstood AU’s radical implications for abortion: AU entails that abortion is, in most cases in the economically developed world, morally obligatory. According to AU, it is morally obligatory for A to do F in circumstances C if and only if A’s doing (...) F in C produces at least as much total net value as any other action that A could do in C. As mentioned above, AU has generally been seen to be fairly permissive about abortion. A little more exactly, AU is usually thought to hold that abortion is morally permissible in most cases, even during the second and third trimester. But not all AUs are Permissivists. Restrictionists maintain that the value of the future good that the fetus will experience over an entire life is likely to often outweigh the value of the good that its female parent will lose if the fetus is not aborted. Neither Permissivists nor Restrictionists have understood AU’s implications for abortion, at least as it concerns those living in economically developed countries today. First, Restrictionists have failed to recognize the marginal costs that a person in the developed world incurs on future people. One life lived now in the developed world consumes more resources than a life lived in the developing world, and in the process makes the prospects of future people considerably worse. Restrictionists ignore these costs when they claim that it is often morally impermissible to abort fetuses. Second, Permissivists have not gone far enough when they have claimed that abortion is morally permissible. Singer and others have argued that we in the developed world ought to redirect much of our wealth to the underdeveloped world because its marginal value is much higher there than here. But the average cost of raising a child in the United States is almost $13,000 per year. Hence, by forgoing a child one can save and maintain, on average, between 6 and 65 people per year. Thus, AU entails that almost everyone in the developed world who is financially capable of supporting a child should not do so, even if that means aborting a fetus. (shrink)

In this article, I shall suggest an approach to the justification of normative moral principles which leads, I think, to utilitarianism. The approach is based on asking what moral norms we would each endorse if we had no prior moral commitments. I argue that we would endorse norms that lead to the satisfaction of all our nonmoral values or goals. The same approach leads to a view of utility as consisting of those goals that we would want satisfied. In the (...) second half of the article, I examine the implication of this view for several issues about the nature of utility, such as the use of past and future goals. The argument for utilitarianism is not completed here. The rest of it requires a defense of expected-utility theory, of interpersonal comparison, and of equal consideration. (shrink)

Jeff McMahan appeals to what he calls the “Time-relative Interest Account of the Wrongness of Killing ” to explain the wrongness of killing individuals who are conscious but not autonomous. On this account, the wrongness of such killing depends on the victim’s interest in his or her future, and this interest, in turn, depends on two things: the goods that would have accrued to the victim in the future; and the strength of the prudential relations obtaining between the victim at (...) the time of the killing and at the times these goods would have accrued to him or her. More precisely, when assessing this interest, future goods should be discounted to reflect reductions in the strength of such relations. Against McMahan’s account I argue that it relies on an implausible “actualist” view of the moral importance of interests according to which satisfactions of future interests only have moral significance if they are satisfactions of actual interests. More precisely, I aim to show that the Time-relative Interest Account does not have the implications for the morality of killing that McMahan takes it to have, and implies, implausibly, that certain interest satisfactions which seem to be morally significant are morally insignificant because they are not satisfactions of actual interests. (shrink)

Morally speaking, is abortion murder? This is what I am calling the ‘abortion problem’. I claim that neither pro-life nor pro-choice advocates have the correct solution; that the correct solution is instead one considered correct by relatively few people. But if this solution really is correct, then why, after years of intense debate, is this solution not more widely accepted? Many, no doubt, are precluded from accepting it by religious dogma. But others, I think, fail to arrive at a correct (...) solution because they have been approaching the problem from the wrong theoretical framework. Or they have been approaching it without any theoretical framework at all. That is, they have no theoretical framework beyond that of merely examining their moral intuitions and, if anything is clear so far from the abortion debate, it is that intuitions alone, which differ radically from person to person, are not sufficient to solve the problem. In short: one is unlikely to arrive at the correct solution unless one starts from a sound theoretical framework. I shall, in what follows, sketch what I take to be a sound theoretical framework. Then I shall try to show what solution to the abortion problem follows from it. (shrink)

We use “I’ll be glad I did it” reasoning all the time. For example, last night I was trying to decide whether to work on this paper or go out to a movie. I realized that if I worked on the paper, then today I would be glad I did it. Whereas, if I went out to the movie, today I would regret it. This enabled me to see that I should work on the paper rather than going out to (...) a movie. This looks like excellent reasoning: Paper argument: 1. If I work on my paper, I’ll be glad I did it. 2. Therefore, I should work on my paper. When we’re having trouble making a big life decision, we often try to picture what will happen each way we might choose, and imagine how we’ll feel in that outcome. When choosing between two jobs, we might use this reasoning. Suppose you are choosing between two jobs and you know quite a lot about what the two jobs will be like. In one, you will make a lot of money but have to work eighty-hour weeks and see little of your family. In the other, you will make considerably less money—though enough to support yourself and your family. You’ll have much more time for your family. The money is attractive. But overall, you realize you’ll be glad to have the time with your family if you take the second job—you’ll be glad you made that choice. It seems this is a good way of realizing that you should take the second job. (shrink)

It is commonly assumed that persons who hold abortions to be generally impermissible must, for the same reasons, be opposed to embryonic stem cell research [ESR]. Yet a settled position against abortion does not necessarily direct one to reject that research. The difference in potentiality between the embryos used in ESR and embryos discussed in the abortion debate can make ESR acceptable even if one holds that abortion is impermissible. With regard to their potentiality, in vitro embryos are here argued (...) to be more morally similar to clonable somatic cells than they are to in vivo embryos. This creates an important moral distinction between embryos in vivo and in vitro. Attempts to refute this moral distinction, raised in the recent debate in this journal between Alfonso Gómez-Lobo and Mary Mahowald, are also addressed. (shrink)

Wer das eigene Leben für sinnlos hält, wird oft auch die Ansicht haben, dass es besser wäre, nicht geboren worden zu sein. In diesem Beitrag wird untersucht, ob Äußerungen wie „Ich wäre lieber nicht geboren“ sinnvoll sind und ob sie sich begründen lassen. Im einleitenden Teil wird gezeigt, dass diese Äußerungen entgegen einer von manchen Philosophen vertretenen Ansicht nicht sprachwidrig sind. Im zweiten Teil wird David Benatars „Asymmetrieargument“ in modifizierter Form verteidigt. Benatar bringt dieses Argument zur Verteidigung der These vor, (...) dass es stets einen Schaden darstellt, in die Existenz zu gelangen. Es wird gezeigt, wie sich das Argument unter Beachtung der Differenz zwischen „jemanden eines Gutes berauben“ und „jemandem ein Gut vorenthalten“ verteidigen lässt. Im dritten Teil werden die praktischen Implikationen des modifizierten Asymmetrieargumentes ausbuchstabiert. Es führt nicht zu einem Anti-Natalismus, wohl aber zur These, dass es rational ist, die eigene Existenz zu bedauern. (shrink)

The moral status of future persons is problematic. It is often claimed that we should take the interests of the indefinite unborn very seriously, because they have a right to a decent life. It is also claimed (often by the same people) that we should allow unrestricted access to abortion, because the indefinite unborn have no rights. In this paper I argue that these intuitions are not in fact inconsistent. The aim is to provide an account of trans-temporal concern which (...) resolves the prima facie inconsistency between commonly held intuitions about our obligations to future persons. I argue that our intuitions can be reconciled provided that we explicate obligations to the future in terms of impersonal principles subject to retroactive person-affecting constraints. (shrink)

Next SectionI challenge the idea that the argument from potential (AFP) represents a valid moral objection to abortion. I consider the form of AFP that was defended by Hare, which holds that abortion is against the interests of the potential person who is prevented from existing. My reply is that AFP, though not unsound by itself, does not apply to the issue of abortion. The reason is that AFP only works in the cases of so-called same number and same people (...) choices, but it falsely presupposes that abortion is such a kind of choice. This refutation of AFP implies that (1) abortion is not only morally permissible but sometimes even morally mandatory and (2) abortion is morally permissible even when the potential person’s life is foreseen to be worth living. (shrink)

In this article, I examine the standard assumption that ethical disagreements on abortion and human embryonic stem cells research are grounded on metaphysical claims that underlie these ethical issues. Contrary to what some philosophers have claimed, I argue that, although the bioethical positions about the human embryo’s moral status are partly grounded on metaphysical claims, incorporating metaphysical arguments in the debates about the ethics of reproduction will not resolve this issue.

We can distinguish two kinds of moral universalization tests for practical principles. One requires that the universal practice of the principle, i.e., universal conformity to it by all agents in a given world, satisfies some condition. The other requires that conformity to the principle by any possible agent, in any situation and at any time, satisfies some condition. We can call these universal practice and universal applicability tests respectively. The logical distinction between these tests is rarely appreciated, and many philosophers (...) systematically confuse them with each other. In practice, UP tests are more frequently used to defend deontological norms, while UA tests are used to defend consequentialist norms. Both conceptual argument and practical examples of their applications will show that UA tests are decisively superior to UP tests for grounding moral norms, casting greater doubt upon deontological theories which rely upon the latter unless they can reformulate their arguments using some version of a UA test. (shrink)

Causal slippery slope arguments with moral conclusions are sometimes stronger than we think. Their strength may be missed either by overlooking the problems of human nature which support the arguments or, upon seeing the problems, by underestimating their influence upon human behaviour. This article aims to correct the oversight and the misjudgement by looking in some detail at four interrelated problems of human nature which have a direct bearing upon moral causal slope arguments.

It appears to have been established that it is not possible for us to harm distant future generations by failing to adopt long-range welfare policies which would conserve resources or limit pollution. By exploring a number of possible worlds, the present article shows, first, that the argument appears to be at least as telling against Aristotelian, rights-based and Rawlsian approaches as it seems to be against utilitarianism, but second, and most importantly, that it only holds if we fail to view (...) moral agents as individuals. The article also concludes that the argument has profoundly counter-intuitive implications. (shrink)

This paper argues that we can benefit or harm people by creating them, but only in the sense that we can create things that are good or bad for them. What we cannot do is to confer comparative benefits and harms to people by creating them or failing to create them. You are not better off (or worse off) created than you would have been had you not been created, for nothing has value for you if you do not exist, (...) not even neutral value. (shrink)

ABSTRACT: A popular response to proponents of embryonic stem cell research and advocates of abortion rights alike-summarized by claims such as “you came from an embryo!” or “you were a fetus once!”-enjoys a rich philosophical pedigree in the arguments of Hare, Marquis, and others. According to such arguments from potentiality, the prenatal human organism is morally valuable because every person’s biological history depends on having completed embryonic and fetal stages. In this article I set out the steps of the underlying (...) argument in light of how it has been cast in the philosophical literature and uncover an intriguingly illicit inference.RÉSUMÉ: On répond souvent aux avocats de la recherche sur les cellules souches et à ceux du droit a l’avortement par une argumentation qui se résume à des affirmations comme : «vous provenez d’un embryon!» ou «vous avez déjà été un fœtus!» -- ce genre de réponse appartient à une riche lignée philosophique qui inclut les arguments de Hare, Marquis et d’autres encore. Selon ces arguments fondés sur la potentialité, l’organisme humain prénatal possède une valeur morale parce que l’histoire biologique de chaque personne dépend de l’accomplissement des états embryonnaire et fœtal. Je présente ici les étapes du raisonnement qui se trouve au fondement de cette argumentation telle qu’elle est formulée dans la littérature philosophique. J’y découvre une inférence curieusement invalide. (shrink)

ABSTRACT: A popular response to proponents of embryonic stem cell research and advocates of abortion rights alike-summarized by claims such as “you came from an embryo!” or “you were a fetus once!”-enjoys a rich philosophical pedigree in the arguments of Hare, Marquis, and others. According to such arguments from potentiality, the prenatal human organism is morally valuable because every person’s biological history depends on having completed embryonic and fetal stages. In this article I set out the steps of the underlying (...) argument in light of how it has been cast in the philosophical literature and uncover an intriguingly illicit inference.RÉSUMÉ: On répond souvent aux avocats de la recherche sur les cellules souches et à ceux du droit a l’avortement par une argumentation qui se résume à des affirmations comme : «vous provenez d’un embryon!» ou «vous avez déjà été un fœtus!» -- ce genre de réponse appartient à une riche lignée philosophique qui inclut les arguments de Hare, Marquis et d’autres encore. Selon ces arguments fondés sur la potentialité, l’organisme humain prénatal possède une valeur morale parce que l’histoire biologique de chaque personne dépend de l’accomplissement des états embryonnaire et fœtal. Je présente ici les étapes du raisonnement qui se trouve au fondement de cette argumentation telle qu’elle est formulée dans la littérature philosophique. J’y découvre une inférence curieusement invalide. (shrink)

College-student subjects made notes about the morality of early abortion, as if they were preparing for a class discussion. Analysis of the quality of their arguments suggests that a distinction can be made between arguments based on well-supported warrants and those based on warrants that are easily criticised. The subjects also evaluated notes made by other, hypothetical, students preparing for the same discussion. Most subjects evaluated the set of arguments as better when the arguments were all on one side than (...) when both sides were presented, even when the hypothetical student was on the opposite side of the issue from the evaluator. Subjects who favoured one-sidedness also tended to make one-sided arguments themselves. The results suggest that ?myside bias? is partly caused by beliefs about what makes thinking good. (shrink)

En este artículo presento una clasificación de las teorías éticas acerca del aborto provocado. En esa clasificación utilizo dos criterios que, aunque inseparables, se pueden tratar relativamente disociados uno del otro. En primer lugar, presento las teorías ordenadas según el estatuto ontológico y ético que otorgan a los gametos, cigotos, preembriones, embriones, fetos y neonatos, y discuto las teorías basadas en la idea de potencialidad. En segundo lugar, me refiero a las teorías centradas en la libertad de la madre. En (...) las consideraciones finales reconozco explícitamente el partidismo de la teoría de teorías propuesta. (shrink)

The main claim of this paper is that the method outlined and used in Aristotle’s Ethics is an appropriate and credible one to use in bioethics. Here “appropriate” means that the method is capable of establishing claims and developing concepts in bioethics and “credible” that the method has some plausibility, it is not open to obvious and immediate objection. It begins by suggesting why this claim matters and then gives a brief outline of Aristotle’s method. The main argument is made (...) in three stages. First, it is argued that Aristotelian method is credible because it compares favourably with alternatives. In this section it is shown that Aristotelian method is not vulnerable to criticisms that are made both of methods that give a primary place to moral theory (such as utilitarianism) and those that eschew moral theory (such as casuistry and social science approaches). As such, it compares favourably with these other approaches that are vulnerable to at least some of these criticisms. Second, the appropriateness of Aristotelian method is indicated through outlining how it would deal with a particular case. Finally, it is argued that the success of Aristotle’s philosophy is suggestive of both the credibility and appropriateness of his method. (shrink)

This book presents a selection of theoretical and applied texts of Richard Hare, as well as an appendix which includes several fundamental studies for the understanding of the ethics of 20th century.

Abortion remains a highly controversial issue in many countries and subject to intense public debate. The aim of this chapter is to summarize the most prominent assumptions and arguments concerning the moral and legal dimensions of abortion on which this debate rests. Where the moral justifiability of abortion is concerned, this chapter focuses on arguments relating to the moral status of the fetus or embryo, the notion of personhood, the biological development of the embryo or fetus, and the moral relevance (...) of specific points in the developmental process. In terms of the legal aspects, we consider concepts and principles invoked at law, principally, the rights of pregnant women and the medical concept of viability. For each moral and legal position in the abortion debate, we provide an overview of the principal assumptions and arguments and acknowledge the main criticisms. (shrink)