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

In the last five or six thousand years, empires one after another have arisen, waxed powerful by wars of conquest, and fallen by internal revolution or attack from without.

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

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.

All great empires die from within.

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.