Though the general principles of statecraft have survived the rise and fall of empires, every increase in knowledge has brought about changes in the political, economic, and social structure.

Science has produced such powerful weapons that in a war between great powers there would be neither victor nor vanquished. Both would be overwhelmed in destruction.

In recent times, European nations, with the use of gunpowder and other technical improvements in warfare, controlled practically the whole world. One, the British Empire, brought under one government a quarter of the earth and its inhabitants.

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.

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

During the last war when there was a market for everything that could be produced, the production capacity of Canada and the United States, which were outside the battle area, increased one hundred percent.

Some wars have been due to the lust of rulers for power and glory, or to revenge to wipe out the humiliation of a former defeat.

When the Industrial Revolution of the nineteenth century brought a rapid increase in wealth, the demand of workers for a fair share of the wealth they were creating was conceded only after riots and strikes.

However difficult it may be to bring it about, some form of world government, with agreed international law and means of enforcing the law, is inevitable.

When the fabric of society is so rigid that it cannot change quickly enough, adjustments are achieved by social unrest and revolutions.

It is said that those whom the gods wish to destroy they first make mad. It may well be that a war neurosis stirred up by propaganda of fear and hatred is the prelude to destruction.

In the last fifty years science has advanced more than in the 2,000 previous years and given mankind greater powers over the forces of nature than the ancients ascribed to their gods.

Measured in time of transport and communication, the whole round globe is now smaller than a small European country was a hundred years ago.

The increase of territory and power of empires by force of arms has been the policy of all great powers, and it has always been possible to get the approval of their state religion.

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

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.

Nearly every country in the world is now becoming industrialized as rapidly as it can.

If the views I have expressed be right, we can think of our civilization evolving with the growth of knowledge from small wandering tribes to large settled law.

The real evil of the Russian communist state is not communism. It is the secret police and the concentration camp.

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