After the First World War the economic problem was no longer one of production. It was the problem of finding markets to get the output of industry and agriculture dispersed and consumed.

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

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.

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

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

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.

Our civilization has evolved through the continuous adjustment of society to the stimulus of new knowledge.