"_Zur Genealogie der Moral_" ("The Genealogy of Morals"), which appeared in 1887, developed these propositions still further. In it there was also a partial return to Nietzsche's earlier manner, with its merciless analysis of moral concepts. In 1888 Nietzsche published a most vitriolic attack upon Wagner, under the title of "_Der Fall Wagner_" ("The Case of Wagner"), the burden of which was the author's discovery that the composer, starting, with him, from Schopenhauer's premises, had ended, not with the superman, but with the Man on the cross. "_Götzendämmerung_" ("The Twilight of the Idols") a sort of parody of Wagner's "_Götterdämmerung_" ("The Twilight of the Gods") followed in 1889. "_Nietzsche contra Wagner_" ("Nietzsche versus Wagner") was printed the same year. It was made up of extracts from the philosopher's early works, and was designed to prove that, contrary to the allegations of his enemies, he had not veered completely about in his attitude toward Wagner. Meanwhile, despite the fact that his health was fast declining and he was approaching the verge of insanity, Nietzsche made plans for a great four volume work that was to sum up his philosophy and stand forever as his _magnum opus._ The four volumes, as he planned them, were to bear the following titles: 1. "_Der Antichrist: Versuch einer Kritik des Christenthums_" ("The Anti-Christ: an Attempt at a Criticism of Christianity"). 2. "_Der freie Geist: Kritik der Philosophie als einer nihilistischen Bewegung_" ("The Free Spirit: a Criticism of Philosophy as a Nihilistic Movement"). 3. "_Der Immoralist: Kritik der verhängnissvollsten Art von Unwissenheit, der Moral_" ("The Immoralist: a Criticism of That Fatal Species of Ignorance, Morality"). 4. "_Dionysus, Philosophie der ewigen Wiederkunft_" ("Dionysus, the Philosophy of Eternal Recurrence"). This work was to be published under the general title of "_Der Wille zur Macht: Versuch einer Umwerthung aller Werthe_" ("The Will to Power: an Attempt at a Transvaluation of all Values"), but Nietzsche got no further than the first book, "_Der Antichrist_" and a mass of rough notes for the others. "_Der Antichrist_" probably the most brilliant piece of writing that Germany had seen in half a century, was written at great speed between September 3rd and September 30th, 1888, but it was not published until 1895, six years after the philosopher had laid down his work forever.