It is reserved for some great critic to give us a study of the psychology of the XIX century. Those of us who as adults saw it face to face in that last moiety of its days when one fierce hand after another—Marx’s, Zola’s, Ibsen’s, Strindberg’s, Turgenief’s, Tolstoy’s—stripped its masks off and revealed it as, on the whole, perhaps the most villainous page of recorded human history, can also recall the strange confidence with which it regarded itself as the very summit of civilization, and talked of the past as a cruel gloom that had been dispelled for ever by the railway and the electric telegraph. But centuries, like men, begin to find themselves out in middle age. The youthful conceit of the nineteenth had a splendid exponent in Macaulay, and, for a time, a gloriously jolly one during the nonage of Dickens. There was certainly nothing morbid in the air then: Dickens and Macaulay are as free from morbidity as Dumas _père_ and Guizot. Even Stendhal and Prosper Merimée, though by no means burgess optimists, are quite sane. When you come to Zola and Maupassant, Flaubert and the Goncourts, to Ibsen and Strindberg, to Aubrey Beardsley and George Moore, to D’Annunzio and Echegaray, you are in a new and morbid atmosphere. French literature up to the middle of the XIX century was still all of one piece with Rabelais, Montaigne and Molière. Zola breaks that tradition completely: he is as different as Karl Marx from Turgot or Darwin from Cuvier. In this new phase we see the bourgeoisie, after a century and a half of complacent vaunting of its own probity and modest happiness (begun by Daniel Defoe in Robinson Crusoe’s praises of ‘the middle station of life’), suddenly turning bitterly on itself with accusations of hideous sexual and commercial corruption. Thackeray’s campaign against snobbery and Dickens’s against hypocrisy were directed against the vices of respectable men; but now even the respectability was passionately denied: the bourgeois was depicted as a thief, a tyrant, a sweater, a selfish voluptuary whose marriages were simple legalizations of unbridled licentiousness. Sexual irregularities began to be attributed to the sympathetic characters in fiction not as the blackest spots in their portraits, but positively as redeeming humanities in them. Jack the Ripper.