So what exactly is the unborn? Can we
gain any meaningful information from embryology regarding what the unborn is? I
believe we can. Let me clarify what embryology is. It is the study of the beginning
and developmental process of the human embryo from the moments of fertilization
till death. Contrary to popular opinion, it is without dispute when human life
originates with respect to embryologists. Let me mention one major textbook
that is widely used in medical schools. In The
Developing Human: Clinically Oriented Embryology 8th edition by
Keith L. Moore and T.V.N. Persaud, they document the following regarding the
question of when human life originates: “Human development is a continuous
process that begins when an oocyte (ovum) from a female is fertilized by a
sperm (spermatozoon) from a male. Cell division, cell migration, programmed
cell death, differentiation, growth, and cell rearrangement transform the
fertilized oocyte, a highly specialized, totipotent cell, a zygote, into
a multicellular human being.” (The
Developing Human: Clinically Oriented Embryology 8th edition, P.
2, Para. 1).
Moreover, on the same page in the
terminology section, a zygote is simply defined as the beginning of a new human
being, which would reiterate the earlier point. In his article “Embryology:
Inconvenient Facts”, William Saunders cites a major textbook indicating the
clarity as to when human life originates when he writes, “Human development
begins at fertilization…. This highly specialized, totipotent cell marked the
beginning of each of us as a unique individual.” (P. 1, Para. 3). There are
other quotations that confirm this. Saunders contends, “Every human being
begins as a single-cell zygote… Each human being is genetically the same human
being at every stage, despite changes in his or her appearance.” (P.1, Para. 2)
First, it should be recognized that the
human embryo contains its own unique genetic structure independent of the
mother and father. When the male sperm and female egg unite, they form an ovum,
which marks the beginning of the developmental process. Different chromosomes
from the sperm and egg merge together and form a unique, whole living human
being. Another fact to consider is that the embryo is capable of guiding its
own internal development from the inside out. Even though it will undergo
changes in its appearance and development, it will not change into another
entity through the developmental process. As Scott Klusendorf points out, human
embryos are clearly human beings because they are the offspring of their human
parents and have the “genetic constitution characteristic of human beings.”
(The Case for Life, P. 37, Para. 5).
In short, it is clear from the facts of
embryology that the human embryo is a distinct, whole, and living human being.
Maureen Condic, a professor of neurobiology and anatomy at the University of
Utah, states why assigning humanity to the unborn is a scientific matter and
nothing else, “Linking human status to the nature of developing embryos is
neither subjective nor open to personal opinion. Human embryos are living human
beings precisely because they possess the single defining feature of human life
that is lost in the moment of death” the ability to function as a coordinated
organism rather than merely as a group of living human cells.” (Life: Defining
the Beginning by the End, P. 6, Para. 3). The facts of embryology are clear:
the human embryo from fertilization onward is a distinct, whole, and living
human being. Anyone, who questions these facts, does not represent the
conclusions of the majority of embryologists on this issue.
But is the human embryo a person
endowed with intrinsic value? By advocating the substance view of persons and
the acronym SLED – which stands for Size, Level of Development, Environment,
and Degree of Dependency - I will argue that the unborn human embryo is a
person who cannot be justifiably killed through an abortion procedure. First,
what is the substance view of human persons? The substance view of human
persons is essentially the view that human beings are persons in virtue of the
kind of thing they are, not in virtue of their abilities. It is the fact you
are a human being that gives you value in the first place. Moreover, preserving
self-identity over time is a real fact of life according to this view. For
example, even though I have changed in height, weight, and level of
intelligence, I am the same person now that I was at the age of 14. So the
substance view of human persons is the claim that (1) It is our nature that
grounds our being a person and that (2) identity over time is preserved, not
lost, despite changes in various factors. This view of human persons can be
traced all the way back to Thomas Aquinas and has contemporary defenders as
well. For example, Francis J. Beckwith defends the substance view of persons in
his book “Defending Life: A Moral and Legal case against abortion choice”.
Philosophers J.P. Moreland and ethicist Scott Rae also defend it in their book
“Body and Soul”.
Now let us apply this reasoning to the pro-life
issue. Klusendorf asserts, “ You were the same being then as you are now,
though your functional abilities and physical characteristics have changed.
From the moment you began to exist, there’s been no substantial change in your
essential nature. Moreover, you are intrinsically valuable in virtue of being
you, not in virtue of some attribute you acquire at some point, such as nice
looks, intelligence, etc. Thus, if you are intrinsically valuable now, you were
intrinsically valuable at the embryonic stage as well. “(The Case for Life, P.
50, Para. 4 & P. 51, Para. 1) Another point can be made to clarify what we
mean when we say that human beings have intrinsic value. In ethics, which is
the branch of philosophy that investigates moral principles in various ways,
there are usually two different kinds of value: intrinsic and instrumental.
Intrinsic value, as I clarified, is the value for simply being what it is.
Instrumental value, by contrast, is the value that gains its value from how it
can be used for certain things or purposes. Something that has instrumental
value only has value in as far as how it can be used for a certain end or
purpose. Examples of this would be hammers, trucks, chairs, and even companies.
Their existence isn’t what gives them value but what they can produce or well
they function is what gives them value. If their level of functionality
worsens, then so does their value.
By contrast human beings, according to
the substance view, are not like this. Human beings have value simply for who
they are. It would be morally wrong to use them as means to a certain end. This
is a fact that virtually everyone affirms, even those who use other people for
their own gains. If people’s value were instrumental and not intrinsic, then
using them for our own gains or redefining their value to accommodate our
self-pleasures and desires would not be morally wrong. One more reason why one
ought to accept the substance view of persons, which grounds intrinsic value,
is because it can ground human equality. It is commonly said that everyone
ought to be treated equally. But what justifies this? Since everyone differs
from each other in size, level of development, environment, and degree of
dependency, the obligation to treat everyone equally cannot be based on those
factors. So what is it? It must be because everyone shares a common human
nature regardless of those other factors.
The acronym SLED is helpful in our
understanding of what it means to argue for the moral, intrinsic worth of each
human being. It stands for Size, Level of Development, Environment, and Degree
of Dependency. How does this apply to the pro-life position? Put simply, there
is no essential moral difference between the human embryos we all once were and
the adults we are now that would justify killing us at those prior stages of
development. A simple argument illustrating this principle will go something
like this:
Ø Unborns, infants, and toddlers have
different sizes, levels of development, come from different environments, and
have different degrees of dependency.
Ø Killing someone at an earlier stage of
development based on the properties in SLED is morally wrong.
Ø Since those changes apply to newborns,
infants, and toddlers as well as human embryos and fetuses, it follows that
those changes cannot be used to justify killing the unborn but sparing the
infants and toddlers.
In simple terms, bigger people are not
more valuable than smaller people, smarter people are not more valuable than
less intelligent people, where people are does not determine who they are, and
people more dependent on their parents are not less valuable than people who
are more independent. People are intrinsically valuable regardless of their
sizes, levels of development, environments, and degrees of dependency. To deny
this would inevitably deny everyone human equality.
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