Results of recent research on hydatidiform moles and teratomas show that during pregnancy the embryo does not receive any message or information from the mother able to control the mechanisms of development or to produce the type of cellular differentiation necessary for building the tissues of the new human adult. Thus, the biological identity of the new human being does not depend on the sojourn in the uterus; the preimplantation embryo is the same individual of the human species as the (...) adult, into whom the embryo can in principle develop. (shrink)

A widely adopted approach to end-of-life ethical questions fails to make explicit certain crucial metaphysical ideas entailed by it and when those ideas are clarified, then it can be shown to be inadequate. These metaphysical themes cluster around the notions of personal identity, personhood and humanness, and the metaphysics of substance. In order to clarify and critique the approach just mentioned, I focus on the writings of Robert N. Wennberg as a paradigm case by, first, stating his views of personal (...) identity, humanness, personhood, and the relations among them; second, offering a comparison of a view of humans as substances (understood in the classic interpretation of Aristotle and Aquinas) vs. a view of humans as property-things; third, applying the metaphysical distinctions surfaced in the second section towards a critique of Wennberg. (shrink)

ABSTRACT This article defends the following argument: what makes you and I valuable so that it is wrong to kill us now is what we are (essentially). But we are essentially physical organisms, who, embryology reveals, came to be at conception/fertilisation. I reply to the objection to this argument (as found in Dean Stretton, Judith Thomson, and Jeffrey Reiman), which holds that we came to be at one time, but became valuable as a subject of rights only some time later, (...) in virtue of an acquired characteristic. I argue against this position that the difference between a basic, natural capacity and some degree of development of such a capacity is a mere difference in degree, that this position logically implies the denial of equal personal dignity, and that the selection of the required degree of development of a capacity is necessarily arbitrary. (shrink)

From the standpoint of a Christian philosopher, heeding the teaching and exhortations of Pope John Paul II and previous popes, I examine three directions in which the recent philosophical debate has developed. In the last seven or eight years there has been 1) a renewed focus on the biological issue of when a human individual comes to be, 2) new arguments for the proposition that personhood is a characteristic acquired after birth, and 3) refinements of the early argument of Judith (...) Thomson. Replying to these developments, I defend, on philosophical grounds, the pro-life position. I argue that a distinct, whole (though immature) human individual comes to be at conception, that he or she is a person, with full moral worth, from the moment he or she comes to be, and the mothers and fathers have a special responsibility to their children which entails (at least) that they ought not to choose to abort them. I conclude by briefly indicating, from the standpoint of Christian faith, why Christian philosophers should vigorously pursue this debate. (shrink)

It is no longer possible to claim that the biological characteristics of the future adult are already determined at conception. After all, a zygote may develop into a hydatidiform mole rather than into a human being. The development of an individual human person is determined by genetically and nongenetically coded molecules within the embryo, together with the influence of the maternal environment. Consequently, it is an error to regard the zygote's chromosomal (and other) DNA as sufficient to determine the uniqueness (...) of the future individual. (shrink)

David Boonin has written the most thorough and detailed case for the moral permissibility of abortion yet published. Critically examining a wide range of arguments that attempt to prove that every human fetus has a right to life, he shows that each of these arguments fails on its own terms. He then explains how even if the fetus does have a right to life, abortion can still be shown to be morally permissible on the critique of abortion's own terms. Finally (...) he considers several pro-life arguments that do not depend on claims that the fetus has a right to life and concludes that these too are ultimately unsuccessful. This major book will be especially helpful to those teaching applied ethics and bioethics in philosophy departments or professional schools of law and medicine. It will interest students of women studies and general readers for whom abortion remains a high-profile issue. (shrink)

When Did I Begin? investigates the theoretical, moral, and biological issues surrounding the debate over the beginning of human life. With the continuing controversy over the use of in vitro fertilization techniques and experimentation with human embryos, these issues have been forced into the arena of public debate. Following a detailed analysis of the history of the question, Reverend Ford argues that a human individual could not begin before definitive individuation occurs with the appearance of the primitive streak about two (...) weeks after fertilization. This, he argues, is when it becomes finally known whether one or more human individuals are to form from a single egg. Thus, he questions the idea that the fertilized egg itself could be regarded as the beginning of the development of the human individual. The author also differs sharply, however, from those who would delay the beginning of the human person until the brain is formed, or until birth or the onset of conscious states. (shrink)

In this companion volume to Warrant: The Current Debate, Plantinga develops an original approach to the question of epistemic warrant; that is what turns true belief into knowledge. He argues that what is crucial to warrant is the proper functioning of one's cognitive faculties in the right kind of cognitive environment.

In 1993, Professor of Jurisprudence, Ronald Dworkin of Oxford University and Professor of Law at New York University, delivered the Georgetown Law Center’s thirteenth Annual Philip A. Hart Memorial Lecture: "Life’s Dominion: An Argument About Abortion and Euthanasia." Dworkin is Professor of Philosophy and Frank Henry Sommer Professor of Law at New York University. He received B.A. degrees from both Harvard College and Oxford University, and an LL.B. from Harvard Law School and clerked for Judge Learned Hand. He was associated (...) with a law firm in New York (Sullivan and Cromwell) and was a professor of law at Yale University Law School from 1962-1969. He has been Professor of Jurisprudence at Oxford and Fellow of University College since 1969. He has a joint appointment at Oxford and at NYU where he is a professor both in the Law School and the Philosophy Department. He is a Fellow of the British Academy and a member of the American Academy of Arts and Sciences. Professor Dworkin is the author of many articles in philosophical and legal journals as well as articles on legal and political topics in the New York Review of Books. He has written Taking Rights Seriously (1977), A Matter of Principle (1985), Law’s Empire (1986), Philosophical Issues in Senile Dementia (1987), A Bill of Rights for Britain (1990), Life’s Dominion (1993), and Freedom’s Law (1996). (shrink)