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.

— Peter Singer

In the past 20 years alone, it adds up to more death than were caused by all the civil and international wars ADN government repression of the entire twentieth century, the century of Hitler and Stalin. How much would we give to prevent those horrors? Yet how little are we doing to prevent today's even larger toll and all the misery that it involves? I believe that if you read this book to the end, and look honestly and carefully at our situation, assessing both the facts and the ethical arguments, you will agree that we must act.

— Peter Singer

In the real world, 90% of the money spent on medical research is focused on conditions that are responsible for just 10% of the deaths and disability caused by diseases globally.

— Peter Singer

In thinking about ethics, we should not hesitate to question ethical views that are almost universally accepted if we have reasons for thinking that they may not be as securely grounded as they appear to be.

— Peter Singer

It is easy for us to criticize the prejudices of our grandfathers, from which our fathers freed themselves. It is more difficult to distance ourselves from our own beliefs so that we can dispassionately search for prejudices among them.

— Peter Singer

It is easy for us to criticize the prejudices of our grandfathers, from which our fathers freed themselves. It is more difficult to search for prejudices among the beliefs and values we hold.

— Peter Singer

It is easy to take a stand about a remote issue, but specialists, like racists, reveal their true nature when the issue comes nearer home. To protest about bullfighting in Spain, the eating of dogs in South Korea, or the slaughter of baby seals in Canada, while continuing to eat eggs from hens who have spent their lives crammed into cages, or veal from calves who have been deprived of their mothers, their proper diet, or the freedom to lie down with their legs extended, is like denouncing apartheid in South Africa while asking your neighbors not to sell their houses to blacks.

— Peter Singer

It is interesting, in this context, to think again of our earlier argument that membership of the species Homo sapiens does not entitle a being to better treatment than a being at a similar mental level who is a member of a different species. We could also have said – except that it seemed too obvious to need saying – that membership of the species Homo sapiens is not a reason for giving a being worse treatment than a member of a different species. Yet in respect of euthanasia, this needs to be said. If your dog is ill and in pain with no chance of recovery, the humane thing to do is take her to the vet, who will end her suffering swiftly with a lethal injection. To ‘allow nature to take its course’, withholding treatment while your dog dies slowly and in distress over days, weeks or months, would obviously be wrong. It is only our misplaced respect for the doctrine of the sanctity of human life that prevents us from seeing that what it is obviously wrong to do to a dog, it is equally wrong to do to a human being who has never been able to express a view about such matters.

— Peter Singer

Just as we will spend large sums to preserve cities like Venice, even though future generations conceivably may not be interested in such architectural treasures, so we should preserve wilderness even though it is possible that future generations will care little for it.

— Peter Singer

Laws and a settled decision procedure to generate them are a good thing. This gives us one important reason for obeying the law. By obeying the law, I can contribute to the respect in which the established decision procedure and the laws are held. By disobeying, I set an example to others that may lead them to disobey too.

— Peter Singer