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.

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.

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.

The history of our civilization has been one of intermittent war.

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

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.

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