The difficulty for the naturalistic writer is that he cannot hold consistently to his principles without ceasing to be an artist and becoming a statistician, for an artist is by definition interested in uniqueness. There can no more be an art about the common man than there can be a medicine about the uncommon man. To think of another as common is to be indifferent to his personal fate; to the degree that one loves or hates another, one is conscious of his or her uniqueness. All the characters in literature with universal appeal, those that seem to reveal every man to himself, are in character and situation very uncommon indeed. A writer who is committed to a naturalist doctrine is driven by his need as an artist to be interesting to find a substitute for the tragic situation in the pathetic, situations of fantastic undeserved misfortune, and a substitute for the morally responsible hero in the pathological case.
The role of impersonal necessity, the necessities of nature or the necessities of the social order in its totality upon the human person can be presented in fiction, in epic poetry and, better still, in the movies, because these media can verbally describe or visually picture that nature and that order; but in drama, where they are forced to remain offstage—there can be no dramatic equivalent to Hardy's description of Egdon Heath in The Return of the Native—this is very difficult. And in opera it is impossible, firstly, because music is in its essence dynamic, an expression of will and self-affirmation and, secondly, because opera, like ballet, is a virtuoso art; whatever his role, an actor who sings is more an uncommon man, more a master of his fate, even as a self-destroyer, than an actor who speaks. Passivity or collapse of the will cannot be expressed in song; if, for example, a tenor really sings the word "Piango," he does not cry, a fact of which some tenors, alas, are only too aware. It is significant as a warning sign that the concluding line of Cavalleria Rusticana, "Hanno ammazzato compare Turiddu," and the concluding line of Pagliacci, "La corn- media e finita," are spoken, not sung.
In practice, the theory of verismo, as applied to opera, meant substituting, in place of the heroic artistocratic setting of the traditional opera seria, various exotic settings, social and geographic. Instead of gods and princes, it gives us courtesans (La Traviata, Manon), gypsies and bullfighters (Carmen), a diva (Tosca), Bohemian artists (La Boheme), the Far East (Madama Butterfly'), etc., social types and situations every bit as unfamiliar to the average operagoer as those of Olympus or Versailles.
Giovanni Verga was no doctrinaire naturalist. He wrote about the Sicilian peasants because he had grown up among them, knew them intimately, loved them and therefore could see them as unique beings. The original short story Cavalleria Rusticana which appeared in Vita dei Campi (1880) differs in several important respects from the dramatized version which Verga wrote four years later and upon which the libretto is based. In the short story the hero Turiddu is the relatively innocent victim of his poverty and his good looks. Santuzza is not the abused defenseless creature we know from the opera but a rich man's daughter who knows very well how to look after herself. Turiddu serenades her but he has no chance of marrying her since he has no money and though she likes him, she does not lose her head. Her betrayal to Alfio of Turiddu's affair with Lola is therefore much more malicious and unsympathetic than it is in the opera. Finally, the reason that Turiddu gives Alfio for insisting upon a fight to the death is not Santuzza's future—he has completely forgotten her—but the future of his penniless old mother.