of their lives, by statements designed to make them believe all sorts of absurd propositions, such as that Blank's pills cure all ills, that Spitzbergen is warm and fertile, and that Germans eat corpses. The art of propaganda, as practised by modern politicians and governments, is derived from the art of advertisement. The science of psychology owes a great deal to advertisers. In former days most psychologists would probably have thought that a man could not convince many people of the excellence of his own wares by merely stating emphatically that they were excellent. Experience shows, however, that they were mistaken in this. If I were to stand up once in a public place and state that I am the most modest man alive, I should be laughed at; but if I could raise enough money to make the same statement on all the busses and on hoardings along all the principal railway lines, people would presently become convinced that I had an abnormal shrinking from publicity. If I were to go to a small shopkeeper and say: "Look at your competitor over the way, he is getting your business; don't you think it would be a good plan to leave your business
