With varying degrees of potency in different individuals, they remain available for the aggressive shaping of men's actions and sentiments whenever a stimulus of more than everyday intensity comes in to call them forth.

And they assert themselves forcibly in any case where no occupation alien to the predatory culture has usurped the individual's everyday range of interest and sentiment.

This is the case among the leisure class and among certain portions of the population which are ancillary to that class.

Hence the facility with which any new accessions to the leisure class take to sports; and hence the rapid growth of sports and of the sporting sentient in any industrial community where wealth has accumulated sufficiently to exempt a considerable part of the population from work.
A homely and familiar fact may serve to show that the predaceous impulse does not prevail in the same degree in all classes.

Taken simply as a feature of modern life, the habit of carrying a walking-stick may seem at best a trivial detail; but the usage has a significance for the point in question.