The predatory and quasi-peaceable stages of economic evolution seem to have been of long duration in life history of all the chief ethnic elements which go to make up the populations of the Western culture.

The temperament and the propensities proper to those cultural stages have, therefore, attained such a persistence as to make a speedy reversion to the broad features of the corresponding psychological constitution inevitable in the case of any class or community which is removed from the action of those forces that make for a maintenance of the later-developed habits of thought.
It is a matter of common notoriety that when individuals, or even considerable groups of men, are segregated from a higher industrial culture and exposed to a lower cultural environment, or to an economic situation of a more primitive character, they quickly show evidence of reversion toward the spiritual features which characterize the predatory type; and it seems probable that the dolicho-blond type of European man is possessed of a greater facility for such reversion to barbarism than the other ethnic elements with which that type is associated in the Western culture.

Examples of such a reversion on a small scale abound in the later history of migration and colonization.

Except for the fear of offending that chauvinistic patriotism which is so characteristic a feature of the predatory culture, and the presence of which is frequently the most striking mark of reversion in modern communities, the case of the American colonies might be cited as an example of such a reversion on an unusually large scale, though it was not a reversion of very large scope.
The leisure class is in great measure sheltered from the stress of those economic exigencies which prevail in any modern, highly organized industrial community.

The exigencies of the struggle for the means of life are less exacting for this class than for any other; and as a consequence of this privileged position we should expect to find it one of the least responsive of the classes of society to the demands which the situation makes for a further growth of institutions and a readjustment to an altered industrial situation.