"Zombies are like the memories of terrible events that we've tried to stash away, tried to forget. And they're not just one memory - they're our mass memory of lives lost, homes destroyed, nations crushed. I think that's why zombies always come in hordes. They return to us the way traumatic memories always do, unbidden, in our fantasies, in a form even more distorted than the original. They're here to make us remember what we've been through and what we've done."