Abstract
The moral status of human embryos and fetuses is one of the most vexed questions in bioethics and various responses often stand or fall on the answer to the question of the ontological status of such entities: whether they count as “persons,” “potential persons,” or merely “human biological material.” The “argument from potential” is intended to support the claim that embryos and fetuses, while not yet persons, are more than mere biological material insofar as there is a high degree of probability that they will develop into persons. A stronger foundation for contending that embryos and fetuses bear the same basic right to life as persons is to establish that such entities are not potential, but actual persons due to their intrinsic potentiality to develop themselves into beings who can engage in those activities definitive of personhood. In addition to critiquing the argument from potential, those who deny that embryos and early-term fetuses count as persons charge that those who understand “whole-brain death” to be necessary and sufficient for a human person to go out of existence inconsistently deny a symmetrical criterion of “brain life” to mark the beginning of a person’s existence. We respond to this charge of inconsistency while further arguing that embryos and fetuses possess the ontological and moral status of persons due to their intrinsic potentiality to develop a brain supportive of self-conscious rational thought.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Ad Hoc Committee of the Harvard Medical School. 1968. A definition of irreversible coma. Journal of the American Medical Association 205: 337–340.
Aquinas, Thomas. 1948. Summa theologiae (trans: English Dominican Fathers). New York, NY: Benziger.
Aquinas, Thomas. 1984. Quaestio disputata de anima (trans: Robb, J.). Milwaukee, WI: Marquette University Press.
Aquinas, Thomas. 1995. Sententia libri metaphysicorum (trans: Rowan, J.). Notre Dame: Dumb Ox Books.
Ashley, Benedict. 1976. A critique of the theory of delayed hominization. In An ethical evaluation of fetal experimentation: An interdisciplinary study, eds. D. McCarthy and A. Moraczewski, 115–129. St Louis, MO: Pope John XXIII Center.
Ashley, Benedict, and Albert Moraczewski. 2001. Cloning, Aquinas, and the embryonic person. National Catholic Bioethics Quarterly 1: 189–201.
Baker, Lynne Rudder. 2005. When does a person begin? Social Philosophy and Policy 22: 25–48.
Beddington, R., and E. Robertson. 1999. Axis development and early asymmetry in mammals. Cell 96: 195–209.
Bigelow, John, and Robert Pargetter. 1988. Morality, potential persons and abortion. American Philosophical Quarterly 25: 173–181.
Boethius. 1918. Contra Eutychen et Nestorium. In Tractates and the consolation of philosophy, trans. H.F. Stewart, E.K. Rand, and S.J. Tester, 72–129. Cambridge, MA: Harvard University Press.
Brown, Brandon P. 2008. Ergon and the embryo. MA thesis, Indiana University-Purdue University Indianapolis.
Brown, Brandon P., and Jason T. Eberl. 2007. Ethical considerations in defense of embryo adoption. In The ethics of embryo adoption and the Catholic tradition, eds. Sarah-Vaughan Brakman and Darlene Fozard Weaver, 103–118. Dordrecht: Springer.
Brown, Mark T. 2007. The potential of the human embryo. Journal of Medicine and Philosophy 32: 585–618.
Buckle, Stephen. 1988. Arguing from potential. Bioethics 2: 227–253.
Burke, Michael B. 1996. Sortal essentialism and the potentiality principle. Review of Metaphysics 49: 491–514.
Charo, R. Alta. 2001. Every cell is sacred: Logical consequences of the argument from potential in the age of cloning. In Cloning and the future of human embryo research, ed. Paul Lauritzen, 82–89. New York, NY: Oxford University Press.
Covey, Edward. 1991. Physical possibility and potentiality in ethics. American Philosophical Quarterly 28: 237–244.
Davis, Dena. 2010. Genetic dilemmas, 2nd ed. New York, NY: Oxford University Press.
DeGrazia, David. 2008. Must we have full moral status throughout our existence? A reply to Alfonso Gómez-Lobo. Kennedy Institute of Ethics Journal 17: 297–310.
DiSilvestro, Russell. 2006. Not every cell is sacred: A reply to Charo. Bioethics 20: 146–157.
Eberl, Jason T. 2004. Aquinas on the nature of human beings. Review of Metaphysics 58: 333–365.
Eberl, Jason T. 2005a. Aquinas’s account of human embryogenesis and recent interpretations. Journal of Medicine and Philosophy 30: 379–394.
Eberl, Jason T. 2005b. A Thomistic understanding of human death. Bioethics 19: 29–48.
Eberl, Jason T. 2006. Thomistic principles and bioethics. New York, NY: Routledge.
Eberl, Jason T. 2008. Potentiality, possibility, and the irreversibility of death. Review of Metaphysics 62: 61–77.
Eberl, Jason T. 2009. Thomism and the beginning of personhood. In Defining the beginning and end of life: Readings on personal identity and bioethics, ed. John P. Lizza, 317–338. Baltimore, MD: Johns Hopkins University Press.
Eberl, Jason T. 2011. Ontological status of whole-brain dead individuals. In The ethics of organ transplantation, ed. Steven Jensen, 43–71. Washington, DC: Catholic University of America Press.
Feinberg, Joel. 1986. Abortion. In Matters of life and death: New introductory essays in moral philosophy, ed. Tom Regan, 2nd ed, 256–293. New York, NY: Random House.
Finnis, John. 2006. Abortion and health care ethics. In Bioethics: An anthology, eds. Helga Kuhse and Peter Singer, 2nd ed, 17–24. Oxford: Blackwell.
Ford, Norman M. 1988. When did I begin? Conception of the human individual in history, philosophy and science. New York, NY: Cambridge University Press.
Gardner, R.L. 1997. The early blastocyst is bilaterally symmetrical and its axis of symmetry is aligned with the animal-vegetal axis of the zygote in the mouse. Development 124: 289–301.
Gardner, R.L. 2001. Specification of embryonic axes begins before cleavage in normal mouse development. Development 128: 839–847.
Gardner, R.L. 2002. Thoughts and observations on patterning in early mammalian development. Reproductive Biomedicine Online 4: 46–51.
George, Robert P., and Christopher Tollefsen. 2008. Embryo: A defense of human life. New York, NY: Doubleday.
Gertler, Gary B. 1986. Brain birth: A proposal for defining when a fetus is entitled to human life. Southern California Law Review 59: 1061–1078.
Gogtay, N., J.N. Giedd, et al. 2004. Dynamic mapping of human cortical development during childhood through early adulthood. Proceedings of the National Academy of Sciences 101: 8174–8179.
Goldenring, John M. 1985. The brain-life theory: Towards a consistent biological definition of humanness. Journal of Medical Ethics 11: 198–204.
Gómez-Lobo, Alfonso. 2004. Does respect for embryos entail respect for gametes? Theoretical Medicine and Bioethics 25: 199–208.
Gómez-Lobo, Alfonso. 2005. On potentiality and respect for embryos: A reply to Mary Mahowald. Theoretical Medicine and Bioethics 26: 105–110.
Gómez-Lobo, Alfonso. 2009. The morality of embryo use by Louis M. Guenin. Notre Dame Philosophical Reviews. http://ndpr.nd.edu/review.cfm?id=15485/. Accessed 1 May 2010.
Guenin, Louis M. 2008. The morality of embryo use. New York, NY: Cambridge University Press.
Hanson, Stephen S. 2006. More on respect for embryos and potentiality: Does respect for embryos entail respect for in vitro embryos? Theoretical Medicine and Bioethics 27: 215–226.
Hershenov, David B. 1999. The problem of potentiality. Public Affairs Quarterly 13: 255–271.
Hudson, Hud. 2001. A materialist metaphysics of the human person. Ithaca, NY: Cornell University Press.
John Paul II. 2001. Address to the international congress on transplants. National Catholic Bioethics Quarterly 1: 89–92.
Jones, D. Gareth. 1989. Brain birth and personal identity. Journal of Medical Ethics 15: 173–178.
Jones, D. Gareth. 1998. The problematic symmetry between brain birth and brain death. Journal of Medical Ethics 24: 237–242.
Joyce, Robert E. 1978. Personhood and the conception event. The New Scholasticism 52: 97–109.
Kretzmann, Norman. 1999. The metaphysics of creation: Aquinas’s natural theology in Summa contra gentiles II. Oxford: Clarendon Press.
Larmer, Robert. 1995. Abortion, personhood and the potential for consciousness. Journal of Applied Philosophy 12: 241–251.
Lee, Patrick. 1996. Abortion and unborn human life. Washington, DC: Catholic University of America Press.
Lee, Patrick. 2004. The pro-life argument from substantial identity: A defence. Bioethics 18: 249–263.
Lee, Patrick, and Robert P. George. 2008. Body-self dualism in contemporary ethics and politics. New York, NY: Cambridge University Press.
Liao, S. Matthew. 2007. Time-relative interests and abortion. Journal of Medicine and Philosophy 4: 242–256.
Lizza, John P. 2007. Potentiality and human embryos. Bioethics 21: 379–385.
Locke, John. 1975. An essay concerning human understanding, ed. P.H. Nidditch. New York, NY: Oxford University Press.
Lockwood, Michael. 1988. Warnock versus Powell (and Harradine): When does potentiality count? Bioethics 2: 187–213.
Mahowald, Mary B. 2004. Respect for embryos and the potentiality argument. Theoretical Medicine and Bioethics 25: 209–214.
Marquis, Don. 1989. Why abortion is immoral. Journal of Philosophy 86: 183–202.
McHugh, Paul R. 2004. Zygote and ‘clonote’: The ethical use of embryonic stem cells. New England Journal of Medicine 351: 209–211.
McMahan, Jeff. 2002. The ethics of killing: Problems at the margins of life. New York, NY: Oxford University Press.
Moody, H.R. 2009. Aging: Concepts and controversies, 5th ed. Thousand Oaks, CA: Pine Forge Press.
Moussa, Mario, and Thomas A. Shannon. 1992. The search for the new pineal gland: Brain life and personhood. Hastings Center Report 22: 30–37.
Oderberg, David S. 1997. Modal properties, moral status, and identity. Philosophy and Public Affairs 26: 259–276.
Olson, Eric. 1997. The human animal: Personal identity without psychology. New York, NY: Oxford University Press.
Pasnau, Robert. 2002. Thomas Aquinas on human nature. New York, NY: Cambridge University Press.
Perrett, Roy W. 2000. Taking life and the argument from potentiality. Midwest Studies in Philosophy 24: 186–197.
Persson, Ingmar. 2002. Human death: A view from the beginning of life. Bioethics 16: 20–32.
Piotrowska, K., and M. Zernicka-Goetz. 2001. Role for sperm in spatial patterning of the early mouse embryo. Nature 409: 517–521.
Piotrowska, K., F. Wianny, R.A. Pedersen, and M. Zernicka-Goetz. 2001. Blastomeres arising from the first cleavage division have distinguishable fates in normal mouse development. Development 128: 3739–3748.
Plantinga, Alvin. 1993. Warrant and proper function. New York, NY: Oxford University Press.
Potts, Michael. 2000. Pro-life support of the whole brain death criteria: A problem of consistency. In Beyond brain death, eds. Michael Potts, Paul A. Bryne, and Richard G. Nilges, 121–138. Boston, MA: Kluwer.
President’s Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research. 1981. Defining death: Medical, legal, and ethical issues in the definition of death. Washington, DC: U.S. Government Printing Office.
President’s Council on Bioethics. 2002. Human cloning and human dignity: An ethical inquiry. http://bioethics.georgetown.edu/pcbe/reports/cloningreport/. Accessed 1 May 2010.
Reichlin, Massimo. 1997. The argument from potential: A reappraisal. Bioethics 11: 1–23.
Repertinger, Susan, William P. Fitzgibbons, Matthew F. Omojola, and Roger A. Brumback. 2006. Long survival following bacterial meningitis-associated brain destruction. Journal of Child Neurology 21: 591–595.
Rogers, Katherin A. 1992. Personhood, potentiality, and the temporarily comatose patient. Public Affairs Quarterly 6: 245–254.
Sass, Hans-Martin. 1989. Brain life and brain death: A proposal for normative agreement. Journal of Medicine and Philosophy 14: 45–59.
Savulescu, Julian. 2001. Should we clone human beings? Cloning as a source of tissue transplantation. In Cloning: Responsible science or technomadness?, eds. M. Ruse and A. Sheppard, 212–230. Amherst, NY: Prometheus Books.
Schwarz, Stephen. 1998. Personhood begins at conception. In The abortion controversy 25 years after Roe v. Wade: A Reader, eds. Louis P. Pojman and Francis J. Beckwith, 257–273. Belmont, CA: Wadsworth.
Shewmon, D. Alan. 1997. Recovery from brain death: A neurologist’s Apologia. Linacre Quarterly 64: 30–96.
Shewmon, D. Alan. 1998. ‘Brainstem death,’ ‘brain death’ and death: A critical re-evaluation of the purported equivalence. Issues in Law and Medicine 14: 125–145.
Shewmon, D. Alan. 2001. The brain and somatic integration: Insights into the standard biological rationale for equating ‘brain death’ with death. Journal of Medicine and Philosophy 26: 457–478.
Singer, Peter. 1975. Animal liberation. New York, NY: Random House.
Singer, Peter. 1992. Embryo experimentation and the moral status of the embryo. In Philosophy and health care, eds. Eric Matthews and Michael Menlowe, 81–91. Brookfield: Avebury.
Singer, Peter, and Karen Dawson. 1990. IVF technology and the argument from potential. In Embryo experimentation: Ethical, legal and social issues, eds. Peter Singer, Helga Kuhse, Stephen Buckle, Karen Dawson, and Pascal Kasimba, 76–89. New York, NY: Cambridge University Press.
Stone, Jim. 1987. Why potentiality matters. Canadian Journal of Philosophy 17: 815–830.
Stump, Eleonore. 2003. Aquinas. New York, NY: Routledge.
Tooley, Michael. 1983. Abortion and infanticide. New York, NY: Oxford University Press.
van Inwagen, Peter. 1990. Material beings. Ithaca, NY: Cornell University Press.
Wade, Francis C. 1975. Potentiality in the abortion discussion. Review of Metaphysics 29: 239–255.
Warren, Mary Anne. 1994. On the moral and legal status of abortion. In Contemporary issues in bioethics, eds. Tom L. Beauchamp and LeRoy Walters, 4th ed, 302–311. Belmont, CA: Wadsworth.
Warren, Mary Anne. 1997. Moral status: Obligations to persons and other living things. New York, NY: Oxford University Press.
White, R., H. Angstwurm, and I. Carrasco de Paula. 1992. Working group on the determination of brain death and its relationship to human death. Vatican City: Pontificia Academia Scientiarum.
Witt, Charlotte. 1995. Powers and possibilities: Aristotle vs. the Megarians. Proceedings of the Boston Area Colloquium in Ancient Philosophy 11: 249–266.
Acknowledgements
We wish to thank Michael Burke, Russell DiSilvestro, David Hershenov, Al Howsepian, Christopher Kaczor, Christopher Tollefsen, and an anonymous reviewer for helpful comments on an earlier draft of this paper. A version of this paper was delivered at the 20th University Faculty for Life Conference at the Catholic University of America in Washington, D.C., June 2010.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer Science+Business Media B.V.
About this chapter
Cite this chapter
Eberl, J.T., Brown, B.P. (2011). Brain Life and the Argument from Potential: Affirming the Ontological Status of Human Embryos and Fetuses. In: Napier, S. (eds) Persons, Moral Worth, and Embryos. Philosophy and Medicine(), vol 111. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1602-5_3
Download citation
DOI: https://doi.org/10.1007/978-94-007-1602-5_3
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-1601-8
Online ISBN: 978-94-007-1602-5
eBook Packages: Humanities, Social Sciences and LawPhilosophy and Religion (R0)