In a Facebook creative writing group that I belong to, some of us are participating in a worldbuilding challenge. While the other participants are posting these wonderful comments about their historically and culturally rich worlds, I’m struggling to come up with something more profound than, “My characters like to eat Italian food.”

As you may know, I am writing a zombie apocalypse story that I envision as a source text for a movie. (You can read part of it here.) Though I would not go so far as to say that the zombie aspect of the story is little more than a set piece–it is thematically important for several reasons–I imagine that people who complain about The Walking Dead not having enough zombies and being a glorified soap opera would really have a lot to complain about in my story. My story is about mental health, friendship, American small towns, Italian food…and zombies, roughly in that order of importance. So when people ask me questions like “How did the zombie apocalypse start?” and “Where are your characters getting water?,” my response is usually, “Hmm, I haven’t really thought about it.” (My characters have had coffee, tea, hot chocolate, and lots of Coke, but water completely slipped my mind. You can see where my priorities lie.)

In my defense, part of the reason I haven’t thought much about the origin of the zombie apocalypse is that my characters don’t know how it started, they won’t find out during the course of this story, and they don’t really care. This is partly because they’re too focused on their own problems (survival, relationships, where they’re going to get Coke) to ponder such existential questions, but it’s also partly because they (at least my two main characters) are big fans of zombie movies and TV. Let me back up for a minute: In most zombie stories, the assumption is that zombie lore doesn’t exist, so the characters are kind of scratching their heads, like “Huh, I wonder what’s happening?” So I decided to do something different. My characters may be useless when it comes to wielding weapons, but they’ve seen all of George Romero’s movies and every episode of The Walking Dead (I haven’t referred to the comics, but I assume they’ve read those too), so they at least have a vocabulary for what’s happening, and they know important things like the fact that you have to shoot or stab a zombie in the head in order to kill it. (I mean, kill it again.)

So, to return to my main point: The characters in those iconic stories usually don’t know why the zombie apocalypse is happening (or how to stop it), so my characters have become resigned to the same uncertainty. In Romero’s films, people speculate about why the dead are walking the earth, but they never figure it out. (The tagline of Dawn of the Dead provides the closest approach to an explanation: “There’s no more room in hell.”) In The Walking Dead, some of the characters visit the Centers for Disease Control and learn a theory from the one remaining employee (who could be crazy for all we know), but the only really useful knowledge they take from that encounter is that “we’re all infected”–i.e. everyone who dies turns, so try not to die.

This is my justification for why I haven’t given much thought to the logic of zombies in my story, but part of me suspects that the real reason is that I’m just not very good at worldbuilding. The commonplace is that writers are usually good at either creating elaborate worlds or creating relatable characters. Yet most of the people in my Facebook group seem to be experts at both. This gives me hope: Maybe I can learn, through challenges like this, to create elaborate worlds for my relatable characters to inhabit.