JUSTIFYING INFANTICIDE AND NON-VOLUNTARY EUTHANASIA
As we have seen, euthanasia is non-voluntary when the subject has never had the capacity to choose to live or die. This is the situation of the severely disabled infant or the older human being who has been profoundly intellectually disabled since birth. Euthanasia or other forms of killing are also non- voluntary when the subject is not now but once was capable of making the crucial choice, and did not then express any preference relevant to her present condition.
The case of someone who has never been capable of choosing to live or die is a little more straightforward than that of a person who had, but has now lost, the capacity to make such a decision. We shall, once again, separate the two cases and take the more straightforward one first. For simplicity, I shall concentrate on infants, although everything I say about them would apply to older children or adults whose mental age is and has always been that of an infant...
the fact that a being is a human being, in the sense of a member of the species Homo sapiens, is not relevant to the wrongness of killing it; it is, rather, characteristics like rationality, autonomy, and self-consciousness that make a difference. Infants lack these characteristics. Killing them, therefore, cannot be equated with killing normal human beings, or any other self-conscious beings...
No infant - disabled or not - has as strong a claim to life as beings capable of seeing themselves as distinct entities, existing over time...
The birth of a child is usually a happy event for the parents. They have, nowadays, often planned for the child. The mother has carried it for nine months. From birth, a natural affection begins to bind the parents to it. So one important reason why it is normally a terrible thing to kill an infant is the effect the killing will have on its parents.
It is different when the infant is born with a serious disability. Birth abnormalities vary, of course. Some are trivial and have little effect on the child or its parents; but others turn the normally joyful event of birth into a threat to the happiness of the parents, and any other children they may have.
Parents may, with good reason, regret that a disabled child was ever born. In that event the effect that the death of the child will have on its parents can be a reason for, rather than against killing it...
Infants are sentient beings who are neither rational nor self- conscious. So if we turn to consider the infants in themselves, independently of the attitudes of their parents, since their species is not relevant to their moral status, the principles that govern the wrongness of killing non-human animals who are sentient but not rational or self-conscious must apply here too.