The shambling undead represent many things; from our fear of death, misunderstanding of other cultures, a means of control, our self-believed power and understanding of the world shrinking in on itself, to a conclusion of sins, and much more. In these worlds, the majority of time the flesh-eating corpses of family and friends are an evil that never arrives. Like the threat of nuclear war, it forces neighbours to become suspicious and unforgiving of one another in some twisted take on the belief that the end always justifies the means. In reality, the end never justifies the means and only results in misery in the never-ending present.
[Shane Ryan, Thunderbolt]