They serve to indicate the stage of economic evolution to which the individual possessed of them is adapted.

They are of importance, therefore, as extraneous tests of the degree of adaptation of the character in which they are comprised to the economic exigencies of today, but they are also to some extent important as being aptitudes which themselves go to increase or diminish the economic serviceability of the individual.
As it finds expression in the life of the barbarian, prowess manifests itself in two main directions--force and fraud.

In varying degrees these two forms of expression are similarly present in modern warfare, in the pecuniary occupations, and in sports and games.

Both lines of aptitudes are cultivated and strengthened by the life of sport as well as by the more serious forms of emulative life.

Strategy or cunning is an element invariably present in games, as also in warlike pursuits and in the chase.