6 Tips For Building a World
So, you want to build a fictional world. Great! Now what?
An over-articulated world can easily tempt you into taking frequent, tedious detours to tell your readers all about it instead of focusing on character and story, and a world that was built with hardly any guiding principles often leads to situations where your audience will constantly ask, “Wait a minute, if X exists, why didn’t they just do Y instead of Z?”
Of course, there is no One Right Way of doing it. But the following principles can serve as useful guides to help keep you on target.
1. Your world doesn’t need to make sense, but it does need to have rules.
Lightsabers, sonic screwdrivers, zombies: none of these things really make sense, but we know what they can and can’t do. Knowing with clarity how things work prompts people to think about what might happen, which pulls them into the story. And for the writer, these rules also define the paths a story can take, form obstacles to be overcome or assets to be cleverly exploited by your characters, and can help you create satisfying suspense, action, twists, and drama.
2. Your rules can be broken, but only rarely, and at the right moment.
Sometimes, a broken rule can create all sorts of lovely responses in your audience. If a villain does something that should not be possible, it can establish the extreme nature of their threat, enhancing the fear and tension. If a hero does the impossible after an emotional three-act journey of unlocking their potential, you’ve created a compelling Chosen One. But if you break your rules too often, they’ll cease to mean anything and your audience will stop caring.
3. Only tell your audience what they need to know.
If it isn’t relevant to the plot, to the character, or to the theme, then your audience doesn’t need to know it, plain and simple. There’s no need to explain all the rules to a fictional card game, for example. As long as your audience understands if a character is cheating, taking a big gamble, or in a tight spot, that’s all that really matters. Don’t force your audience to study your lore just to understand what they’re supposed to feel.
Moreover, what your audience doesn’t know can open up your world in ways no amount of information ever could. If an audience knows what a monster can do, but not what it wants or where it came from, the mystery can be powerfully compelling. Imagination often soars more vividly when left in the dark.
4. Treat your cultures the way you treat your characters.
As with your characters, first impressions of your fictional societies are crucial. We learn the most important things about Harry Potter the moment we meet him waking up in a cupboard under the stairs, brushing spiders off his socks. The same is true of hobbits, Klingons, and the Capitol of Panem. The rest—what deities they believe in, what their legal system looks like, what political factions exist—can be elaborated as the need arises. It is far more important for your audience to know what a member of a certain race, nation, or religion is likely to think or do in a given moment than it is for them to be well-versed in the particulars right off the bat. Just remember not to keep putting off that nuance indefinitely, or you’ll end up writing caricatures instead of believable cultures.
5. Don’t have something explained to a character who should already know it.
Physicists don’t go around explaining black holes to other physicists in the real world, so why would they in fiction? If you need to explain something to your audience, that’s what a Fish Out of Water is for! Harry Potter, Luke Skywalker, Bilbo Baggins—their ignorance is wonderfully useful for world building. If you find yourself writing dialogue like “As you well know,” chances are you need to find another way to introduce or integrate the information.
6. Culture clash is your friend.
But what if your story has no room for a character who’s been living under a rock and needs everything explained to them? Well, if you put characters in situations where their worldviews are at odds, but they have to come to an agreement about what to do, having them argue about it is a convenient and natural way to get them to explain and defend their morals, traditions, or beliefs. Dramatic conflict can thus be used to develop story, character, theme, and world simultaneously.
And lastly, you can’t build a world without giving it a shot, so go and keep filling blank pages with words. Deliberate practice over time is the only way to become a better writer.

Rafael Hernan Gamboa
A Los Angeles native and a graduate of Sarah Lawrence College, Rafael is an award-winning writer, director, and video editor. His short film Violet recently premiered at the 2019 LA Shorts International Film Festival, and his follow-up Underwater was made as part of the 48 Hour Film Project. In his free time, he makes video essays about film and television on his YouTube channel The Long Take, a few of which have been featured on the A.V. Club, and texts “we should hang out sometime” to other 30-somethings as if anybody can even do that anymore.