An animal experiment cannot be justifiable unless the experiment is so important that the use of a brain-damaged human would be justifiable.

To give preference to the life of a being simply because that being is a member of our species would put us in the same position as racists who give preference to those who are members of their race.

The notion that human life is sacred just because it is human life is medieval.

It's also much clearer how much damage the occupation of Iraq is doing to America's reputation and prestige around the world; and that's just starting now to hit home in the United States.

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 not live, when killing the newborn baby is not at all wrong ... not like killing the chimpanzee would be.

Extreme poverty is not only a condition of unsatisfied material needs. It is often accompanied by a degrading state of powerlessness.

I believe that in this new world that we live in, we often have a responsibility, you know, to actually go beyond the thou shalt nots - that is, the not harming others - and say we can help others and we should be helping others.