As we have seen, the wireless and the airplane have made the world so small and nations so dependent on each other that the only alternative to war is the United States of the World.

Knowledge acquired in biological research is seldom directly applicable to human beings ... The results of scientific research, obtained under these conditions, cannot be applied directly to human beings who vary widely in their hereditary make-up, in their environment, and in their past health record.

Empires won by conquest have always fallen either by revolt within or by defeat by a rival.

As I have tried to show, science, in producing the airplane and the wireless, has created a new international political environment to which governments must adjust their foreign policies.

Our civilization is now in the transition stage between the age of warring empires and a new age of world unity and peace.

We are now physically, politically, and economically one world and nations so interdependent that the absolute national sovereignty of nations is no longer possible.

Some think the worst horrors of war might be avoided by an international agreement not to use atomic bombs. This is a vain hope.