Voluntary euthanasia occurs only when, to the best of medical knowledge, a person is suffering from an incurable and painful or extremely distressing condition. In these circumstances one cannot say that to choose to die quickly is obviously irrational.

I agree with Varner and Scruton that the more one thinks of one's life as a story that has chapters still to be written, and the more one hopes for achievements yet to come, the more one has to lose by being killed. For this reason, when there is an irreconcilable conflict between the basic survival needs of animals and of normal humans, it is not speciesist to give priority to the lives of those with a biographical sense of their life and a stronger orientation towards the future.

In the absence of any general inference from ‘A is a potential X’ to ‘A has the rights of an X’, we should not accept that a potential person should have the rights of a person, unless we can be given some specific reason why this should hold in this particular case.

A week-old baby is not a rational and self-aware being, and there are many nonhuman animals whose rationality, self-awareness, capacity to feel and so on, exceed that of a human baby a week or a month old. If, for the reasons I have given, the fetus does not have the same claim to life as a person, it appears that the newborn baby does not either.

First premise: If we can prevent something bad without sacrificing anything of comparable significance, we ought to do it. Second premise: Extreme poverty is bad. Third premise: There is some extreme poverty we can prevent without sacrificing anything of comparable moral significance. Conclusion: We ought to prevent some extreme poverty.

No doubt we instinctively prefer to help those who are close to us. Few could stand by and watch a child drown; many can ignore the avoidable deaths of children in Africa or India. The question, however, is not what we usually do, but what we ought to do, and it is difficult to see any sound moral justification for the view that distance, or community membership, makes a crucial difference to our obligations.

We have examined a number of ethical issues. We have seen that many accepted practices are open to serious objections. What ought we to do about it? This, too, is an ethical issue.