I did not imagine that the second half of my life would be spent on efforts to avert a mortal danger to humanity created by science.

Above all remember your humanity.

The present basic philosophy is nuclear deterrence.

From my earliest days I had a passion for science.

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.

Technology is driving us together. In many ways we are becoming like one family. With the global threats resulting from science and technology, the whole of humankind now needs protection. We have to extend our loyalty to the whole of the human race.

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.