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.

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

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

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.

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

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

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