The great leaders of the second world war alliance, Franklin Roosevelt and Winston Churchill, understood the twin sides of destruction and salvation. Their war aims were not only to defeat fascism, but to create a world of shared prosperity.
Religions that teach brotherly love have been used as an excuse for persecution, and our profoundest scientific insight is made into a means of mass destruction.
Our task, your task... is to try to connect the dots before something happens. People say, 'Well, where's the smoking gun?' Well, we don't want to see a smoking gun from a weapon of mass destruction.
Indeed, the whole human species is endangered, by nuclear weapons or by other means of wholesale destruction which further advances in science are likely to produce.
But the first the general public learned about the discovery was the news of the destruction of Hiroshima by the atom bomb. A splendid achievement of science and technology had turned malign. Science became identified with death and destruction.
We were told by the president that we had no alternative but to go into Iraq because of the threat that Saddam Hussein's weapons of mass destruction posed, but to date, these weapons have not been found.
The rapid dissemination of technology and information offers entirely new ways of production, but it can also bring the spectre of more states developing weapons of mass destruction.
But I want to just caution, it is not incumbent on the United States to prove that Saddam Hussein is trying to acquire weapons of mass destruction. He's already demonstrated that he's trying to acquire weapons of mass destruction.
Certainly it is wrong to be cruel to animals and the destruction of a whole species can be a great evil. The capacity for feelings of pleasure and pain and for the form of life of which animals are capable clearly impose duties of compassion and humanity in their case.