INTRODUCTION WHEN the individual is in good health, mental and physical, he generally has some primary purpose, and guides his life accordingly. The nature of his purpose is of the greatest import, since it reveals the basic character of the man. But even an unhallowed purpose is preferable to one of mere vegetation. The shark is not an admirable creature, but rates a good deal higher in the scale of life than does the jellyfish. Nations, which are rather arbitrary collections of men under a common