Gottfried Leibniz

Indeed every monad must be different from every other. For there are never in nature two beings, which are precisely alike, and in which it is not possible to find some difference which is internal, or based on some intrinsic quality.

I do like the zombie movies quite a bit. I know there are purist zombie guys that don't like the running zombies, but I dig the infected thing. I think that's a scarier incorporation of an element into the genre.