Nihilism: The Root of the Revolution of the Modern Age

What is the Nihilism in which we have seen the root of the Revolution of the modern age? 
The answer, at first thought, does not seem difficult; several obvious examples of it spring immediately to mind. There is Hitler's fantastic program of destruction, the Bolshevik Revolution, the Dadaist attack on art; there is the background from which these movements sprang, most notably represented by several "possessed" individuals of the late nineteenth century--poets like Rimbaud and Baudelaire, revolutionaries like Bakunin and Nechayev, "prophets" like Nietzsche; there is, on a humbler level among our contemporaries, the vague unrest that leads some to flock to magicians like Hitler, and others to find escape in drugs or false religions, or to perpetrate those "senseless" crimes that become ever more characteristic of these times. But these represent no more than the spectacular surface of the problem of Nihilism. To account even for these, once one probes beneath the surface, is by no means an easy task; but the task we have set for ourselves is broader: to understand the nature of the whole movement of which these phenomena are but extreme examples.
Rose's (1932 - 1982) brief but potent deconstruction of nihilism is just a fragment of much larger but never completed work.