Zombies - A Path to Self-Destruction

But if you think they finish the job sucking out our eyeballs and chewing on your forearm even after you've died, then zombies do at least eat the newly deceased. This may seem like a small point, but it could mean the difference between real hope for civilization's survival and total world collapse. If zombies continue feeding on the dead, then they are effectively destroying their own reinforcements. A person with a deadly bite may rise up to become a zombie himself, but a body that has been chewed down to nothing won't be physically able to stand and search out new victims. Zombies could quite literally eat themselves out of existence. Our hope is that they have really big appetites and don't know when to say when.