From Daniel Drezner, at Foreign Policy:
This zombie boom is -- and should be -- taken seriously. For some international relations thinkers, the interest in all things ghoulish might represent an indirect attempt to get a cognitive grip on what former U.S. Defense Secretary Donald Rumsfeld once referred to as the "unknown unknowns" in international security. Or perhaps there exists a genuine if publicly unacknowledged fear of the dead rising from their graves and feasting upon our entrails. Major universities have developed mock contingency plans for a zombie outbreak, and an increasing number of college students have been found to be playing "Humans vs. Zombies" on their campuses, whether to relieve stress or prepare for the invasion of the undead. The Haitian government takes the threat seriously enough to have a law on the books to prevent outbreaks of zombiism. No great power has done the same publicly, but one can only speculate on what plans are being hatched behind closed doors.
From a public-policy perspective, zombies surely merit greater interest than other paranormal phenomena such as aliens, vampires, wizards, hobbits, mummies, werewolves, and superheroes. Zombie stories end in one of two ways -- the elimination/subjugation of all zombies, or the eradication of humanity from the face of the Earth. If popular culture is to be believed, the peaceful coexistence of ghouls and humans is but a remote possibility -- outside of Shaun of the Dead, at least. Such extreme all-or-nothing outcomes are far less common in the vampire and wizard canons. Indeed, recent literary tropes suggest that vampires can peacefully coexist with ordinary teens in many of the world's high schools, provided they are sufficiently hunky. Zombies, not so much. If it is true that "popular culture makes world politics what it currently is," as a recent article in Politics argued, then the international relations community needs to think about armies of the undead in a more urgent manner.