On 1 March 1955, Prime Minister Winston Churchill spoke to the House of Commons:
"There is an immense gulf between the atomic and hydrogen bomb. The atomic bomb, with all its terrors, did not carry us outside the scope of human control or manageable events in thought or action, in peace or war. But when Mr. Sterling Cole, the Chairman of the United States Congressional Committee, gave out a year ago—17th February, 1954—the first comprehensive review of the hydrogen bomb, the entire foundation of human affairs was revolutionised, and mankind placed in a situation both measureless and laden with doom….
"I shall content myself with saying about the power of this weapon, the hydrogen bomb, that apart from all the statements about blast and heat effects over increasingly wide areas there are now to be considered the consequences of 'fall out,' as it is called, of wind-borne radio-active particles. There is both an immediate direct effect on human beings who are in the path of such a cloud and an indirect effect through animals, grass and vegetables, which pass on these contagions to human beings through food.
"This would confront many who escaped the direct effects of the explosion with poisoning, or starvation, or both. Imagination stands appalled. There are, of course, the palliatives and precautions of a courageous Civil Defense … but our best protection lies, as I am sure the House will be convinced, in successful deterrents operating from a foundation of sober, calm and tireless vigilance.
"Moreover, a curious paradox has emerged. Let me put it simply. After a certain point has been passed it may be said, 'The worse things get the better.' The broad effect of the latest developments is to spread almost indefinitely and at least to a vast extent the area of mortal danger. This should certainly increase the deterrent upon Soviet Russia by putting her enormous spaces and scattered population on an equality or near-equality of vulnerability with our small densely populated island and with Western Europe….
"Then it may well be that we shall by a process of sublime irony have reached a stage in this story where safety will be the sturdy child of terror, and survival the twin brother of annihilation."