The greatest philosopher in history? I need to know on what
   terms greatness is measured. Impact on Western Civilization? A
   tie between Plato and Aristotle. Modern education? Nietzsche
   w/Marx for the deconstructionalist side of things and whoever
   that guy whose name I forget that started Scottish Pragmatism
   for the constructionalist side. Friendship and the "best-of"
   parts of Western religions? Epicurus.