"In learning how to manipulate nuclear energy man has taken the greatest step in the control of the forces of nature since his half-human ancestors learnt how to make and maintain fire. Just as fires can be, and in the early days often were, utterly destructive of life in the forests and on the prairies, so this new power may be utterly destructive of all that has been built up in a thousand generations. Man's moral stature has not grown with his intellectual stature, or rather perhaps it would be fairer to say man's institutions have not advanced as fast as his power to harness the forces of nature to his will. For I am convinced that if a vote could be taken the world over as to whether there was any object in the world for which it was worth while to start an aggressive war, not one man in a hundred would say "Yes." Unfortunately, as we have recently seen, modern developments make it so easy for a few vicious leaders to mislead, control and dominate great nations that the natural, decent human instincts of mankind are no adequate safeguard."