of power--are concerned with social relations. I think this is the source of what is erroneous in the Marxian interpretation of history, which tacitly assumes that acquisitiveness is the source of all political actions. It is clear that many men willingly forego wealth for the sake of power and glory, and that nations habitually sacrifice riches to rivalry with other nations. The desire for some form of superiority is common to almost all energetic men. No social system which attempts to thwart it can be stable, since the lazy majority will never be a match for the energetic minority.
What is called "virtue" is an offshoot of vanity: it is the habit of acting in a manner which others praise.
The operation of material conditions may be illustrated by the statement (Myers's _Dawn of History_) that four of the greatest movements of conquest have been due to drought in Arabia, causing the nomads of that country to migrate into regions already inhabited. The last of these four movements was the rise of Islam. In these four cases, the primal need of food and drink was enough to set events in motion; but as this need could only be satisfied by conquest, the four secondary passions must have very soon come into play. In the conquests of modern industrialism, the
