“Linguistic turn”, “pragmatic paradigm”, “Destruktion”, “deconstruction”, “condition postmoderne”, “pensiero debole” are not only philosophical labels. They are not only indices of intellectual positions which have inscribed themselves, as consequences as well as preconditions, in the end of traditional metaphysics. “Nothing is true, everything is permitted”, Nietzsche's Genealogy of Morals announces, describing the empty space which the metaphysical concepts have left; and in doing so opening up a seemingly boundless dimension for new developments of thoughts. The dilemma of these developments of modernity is that the vacuum they left, caused by their ruthless critique, cannot be refilled. So the outlook of modernity remains necessarily heterogeneous and unstable, meandering towards the colourful and fashionable-macabre extremes of postmodemity which gain from the tragic certainty of rien ne va plus the happy imperative of anything goes. But these are also ciphers of a particular philosophical-historical constellation, a work situation, in which the potencies of reason, being verhimmelt for a long time, now are going to be situated into their real contexts. Only, as Habermas puts it, “under the premises of an unexcited postmetaphysical thinking”, the once heroic concept of theory, which was meant to explain the world of human beings and their history as well as Nature out of onto-theleological principles of rationality, falls to pieces.