After these completed works Byron's fragment does not count for much philosophically. Our vagabond libertines are no more interesting from that point of view than the sailor who has a wife in every port, and Byron's hero is, after all, only a vagabond libertine. And he is dumb: he does not discuss himself with a Sganarelle-Leporello or with the fathers or brothers of his mistresses: he does not even, like Casanova, tell his own story. In fact he is not a true Don Juan at all; for he is no more an enemy of God than any romantic and adventurous young sower of wild oats. Had you and I been in his place at his age, who knows whether we might not have done as he did, unless indeed your fastidiousness had saved you from the empress Catherine. Byron was as little of a philosopher as Peter the Great: both were instances of that rare and useful, but unedifying variation, an energetic genius born without the prejudices or superstitions of his contemporaries. The resultant unscrupulous freedom of thought made Byron a greater poet than Wordsworth just as it made Peter a greater king than George III; but as it was, after all, only a negative qualification, it did not prevent Peter from being an appalling blackguard and an arrant poltroon, nor did it enable Byron to become a religious force like Shelley. Let us, then, leave Byron's Don Juan out of account. Mozart's is the last of the true Don Juans; for by the time he was of age, his cousin Faust had, in the hands of Goethe, taken his place and carried both his warfare and his reconciliation with the gods far beyond mere lovemaking into politics, high art, schemes for reclaiming new continents from the ocean, and recognition of an eternal womanly principle in the universe. Goethe's Faust and Mozart's Don Juan were the last words of the XVIII century on the subject; and by the time the polite critics of the XIX century, ignoring William Blake as superficially as the XVIII had ignored Hogarth or the XVII Bunyan, had got past the Dickens-Macaulay Dumas-Guizot stage and the Stendhal-Meredith-Turgenieff stage, and were confronted with philosophic fiction by such pens as Ibsen's and Tolstoy's, Don Juan had changed his sex and become Dona Juana, breaking out of the Doll's House and asserting herself as an individual instead of a mere item in a moral pageant.
Now it is all very well for you at the beginning of the XX century to ask me for a Don Juan play; but you will see from the foregoing survey that Don Juan is a full century out of date for you and for me; and if there are millions of less literate people who are still in the eighteenth century, have they not Moliere and Mozart, upon whose art no human hand can improve? You would laugh at me if at this time of day I dealt in duels and ghosts and "womanly" women. As to mere libertinism, you would be the first to remind me that the Festin de Pierre of Moliere is not a play for amorists, and that one bar of the voluptuous sentimentality of Gounod or Bizet would appear as a licentious stain on the score of Don Giovanni. Even the more abstract parts of the Don Juan play are dilapidated past use: for instance, Don Juan's supernatural antagonist hurled those who refuse to repent into lakes of burning brimstone, there to be tormented by devils with horns and tails. Of that antagonist, and of that conception of repentance, how much is left that could be used in a play by me dedicated to you? On the other hand, those forces of middle class public opinion which hardly existed for a Spanish nobleman in the days of the first Don Juan, are now triumphant everywhere.
Civilized society is one huge bourgeoisie: no nobleman dares now shock his greengrocer. The women, "marchesane, principesse, cameriere, cittadine" and all, are become equally dangerous: the sex is aggressive, powerful: when women are wronged they do not group themselves pathetically to sing "Protegga il giusto cielo": they grasp formidable legal and social weapons, and retaliate. Political parties are wrecked and public careers undone by a single indiscretion. A man had better have all the statues in London to supper with him, ugly as they are, than be brought to the bar of the Nonconformist Conscience by Donna Elvira. Excommunication has become almost as serious a business as it was in the X century.