Apart from warlike activity proper, the institution of the duel is also an expression of the same superior readiness for combat; and the duel is a leisure-class institution. The duel is in substance a more or less deliberate resort to a fight as a final settlement of a difference of opinion. In civilized communities it prevails as a normal phenomenon only where there is an hereditary leisure class, and almost exclusively among that class. The exceptions are (1) military and naval officers who are ordinarily members of the leisure class, and who are at the same time specially trained to predatory habits of mind and (2) the lower-class delinquents -- who are by inheritance, or training, or both, of a similarly predatory disposition and habit. It is only the high-bred gentleman and the rowdy that normally resort to blows as the universal solvent of differences of opinion. The plain man will ordinarily fight only when excessive momentary irritation or alcoholic exaltation act to inhibit the more complex habits of response to the stimuli that make for provocation. He is then thrown back upon the simpler, less differentiated forms of the instinct of self-assertion; that is to say, he reverts temporarily and without reflection to an archaic habit of mind.
This institution of the duel as a mode of finally settling disputes and serious questions of precedence shades off into the obligatory, unprovoked private fight, as a social obligation due to one's good repute. As a leisure-class usage of this kind we have, particularly, that bizarre survival of bellicose chivalry, the German student duel. In the lower or spurious leisure class of the delinquents there is in all countries a similar, though less formal, social obligation incumbent on the rowdy to assert his manhood in unprovoked combat with his fellows. And spreading through all grades of society, a similar usage prevails among the boys of the community. The boy usually knows to nicety, from day to day, how he and his associates grade in respect of relative fighting capacity; and in the community of boys there is ordinarily no secure basis of reputability for any one who, by exception, will not or can not fight on invitation.
All this applies especially to boys above a certain somewhat vague limit of maturity. The child's temperament does not commonly answer to this description during infancy and the years of close tutelage, when the child still habitually seeks contact with its mother at every turn of its daily life. During this earlier period there is little aggression and little propensity for antagonism. The transition from this peaceable temper to the predaceous, and in extreme cases malignant, mischievousness of the boy is a gradual one, and it is accomplished with more completeness, covering a larger range of the individual's aptitudes, in some cases than in others. In the earlier stage of his growth, the child, whether boy or girl, shows less of initiative and aggressive self-assertion and less of an inclination to isolate himself and his interests from the domestic group in which he lives, and he shows more of sensitiveness to rebuke, bashfulness, timidity, and the need of friendly human contact. In the common run of cases this early temperament passes, by a gradual but somewhat rapid obsolescence of the infantile features, into the temperament of the boy proper; though there are also cases where the predaceous futures of boy life do not emerge at all, or at the most emerge in but a slight and obscure degree.
In girls the transition to the predaceous stage is seldom accomplished with the same degree of completeness as in boys; and in a relatively large proportion of cases it is scarcely undergone at all. In such cases the transition from infancy to adolescence and maturity is a gradual and unbroken process of the shifting of interest from infantile purposes and aptitudes to the purposes, functions, and relations of adult life. In the girls there is a less general prevalence of a predaceous interval in the development; and in the cases where it occurs, the predaceous and isolating attitude during the interval is commonly less accentuated.
In the male child the predaceous interval is ordinarily fairly well marked and lasts for some time, but it is commonly terminated (if at all) with the attainment of maturity. This last statement may need very material qualification. The cases are by no means rare in which the transition from the boyish to the adult temperament is not made, or is made only partially -- understanding by the "adult" temperament the average temperament of those adult individuals in modern industrial life who have some serviceability for the purposes of the collective life process, and who may therefore be said to make up the effective average of the industrial community.
The ethnic composition of the European populations varies.
In some cases even the lower classes are in large measure made up of the peace-disturbing dolicho-blond; while in others this ethnic element is found chiefly among the hereditary leisure class. The fighting habit seems to prevail to a less extent among the working-class boys in the latter class of populations than among the boys of the upper classes or among those of the populations first named.
If this generalization as to the temperament of the boy among the working classes should be found true on a fuller and closer scrutiny of the field, it would add force to the view that the bellicose temperament is in some appreciable degree a race characteristic; it appears to enter more largely into the make-up of the dominant, upper-class ethnic type -- the dolicho-blond -- of the European countries than into the subservient, lower-class types of man which are conceived to constitute the body of the population of the same communities.
