There could conceivably be circumstances in which an experiment on an animal stands to reduce suffering so much that it would be permissible to carry….

What is there about the notion of a person, at law, that makes every living member of the species Homo sapiens a person, irrespective of their mental….

We ought to consider the interests of animals because they have interests and it is unjustifiable to exclude them from the sphere of moral concern; t….

The new freedom of expression brought by the Internet goes far beyond politics. People relate to each other in new ways, posing questions about how w….

We don't usually think of what we eat as a matter of ethics. Stealing, lying, hurting people - these acts are obviously relevant to our moral charact….

Take for example providing a guide dog for a blind person. That's a good thing to do, right? All right. It is a good thing to do. But you have to thi….

We need to learn how to capture and kill wild fish humanely - or, if that is not possible, to find less cruel and more sustainable alternatives to ea….

If you go back in time you'll find tribes that were essentially only concerned with their own tribal members. If you were a member of another tribe, ….

I am not saying that factory farming is the same as the Holocaust or the slave trade, but it's clear that there is an immense amount of suffering in ….

Christianity is our foe. If animal rights is to succeed, we must destroy the Judeo-Christian religious tradition..

So why don't we make ourselves the last generation on earth? If we would all agree to have ourselves sterilized then no sacrifices would be required ….

If evolution is a struggle for survival, why hasn't it ruthlessly eliminated altruists, who seem to increase another's prospects of survival at the c….

As we realize that more and more things have global impact, I think we're going to get people increasingly wanting to get away from a purely national….

The future of the world depends on how well we meet it..

The only justifiable stopping place for for the expansion of altruism is the point at which all whose welfare can be affected by our actions are incl….

The idea that we can actually have an impact on places more or less instantly, too, by responding in some way or not responding, I think, also makes ….

There are some circumstances, for example, where the newborn baby is severely disabled and where the parents think that it's better that child should….

I suppose what's happened recently has confirmed suspicions I voiced in the book, and I think made clearer some of those things that I point out. For….

The most callous, stupid things were done just because regulations required them...It was not until 1983, for example, that U.S. federal agencies sta….

Sci-fi is often a metaphor. I think it's more the themes and questions that science fiction raises rather than the exact predictions that should guid….

It may be thought justifiable to require tests on animals of potentially life-saving drugs, but the same kinds of tests are used for products like co….