Dude, if you're still stuck on Leibniz, you should probably start reading, oh, maybe everything written in the late 19th century by the German philosophers (Hegel, Nietzsche, Husserl, Heidegger, Gadamer, maybe Jaspers, although that's later), and then again the mid-20th by the French (Barthes, Foucault, Derrida, maybe Deleuze), for starters.
If Liebniz was right, how the hell would he prove it?