The reason I suggest the history of the problem could be read as stretching from Plato to Nietzsche is because Nietzsche's unparalleled assault upon the two world dualism, which he sees as the heart of almost all metaphysics, can be read as a version of this same problem of the one and the many. Indeed, there is a way to read the conclusion of both Plato and Nietzsche's grappling with this problem as indicating, against each of their conscious wills, the way to jump out of the dialectic. It is, I would argue, precisely this point which Heidegger sees when he suggests that the challenge for philosophy now is to think the Nothing.