I'd like to think that over the years of the existance of loaves of bread, that somewhere, someone would have thought of it. Since no one needs a whole damn loaf, they would eventually just tear some off, then leading to slicing in the near future.

Haha, okay I just re-read that last sentence, and now I know it's time for bed. What the hell was I talking about ? : )

Oh, uhh, I think the point of it all was that human beings are the most advanced and intelligent creatures, so something like slicing bread would have been discovered sooner or later. Haha, there I go again.