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. – Joseph Rotblat

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. – Joseph Rotblat

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. – Joseph Rotblat