The Unconscious appears as a combination of the metaphysics of Georg Wilhelm Friedrich Hegel with that of Arthur Schopenhauer. In von Hartmann's view, Hegel and Schopenhauer were both wrong in making Idea or Reason subordinate to Will or Will subordinate to Idea or Reason; on the contrary, neither can act alone, and neither is the result of the other. The Will's lack of logic causes the existence of the "that" () of the world; the Idea or Reason, though not conscious, is logical, and determines the essence, the "what" (). The endless and vain striving of the Will necessitates the great preponderance of suffering in the universe, which could not well be more wretched than it is. Nevertheless, it must be characterized as the best possible world, for both nature and history are constantly developing in the manner best adapted to the ending of the world; and by means of increasing consciousness the idea, instead of prolonging suffering to eternity, provides a refuge from the evils of existence in non-existence.