Sci-fi doesn’t really work unless the world clicks into place. You can have the wildest concept imaginable, but if the surrounding universe feels thin, the whole thing falls apart. That’s why the genre’s best stories don’t just tell you what’s happening; they convince you it’s been happening long before you arrived. Movies like Blade Runner and The Matrix proved long ago that world-building is the lifeblood of science fiction, giving us futures so vivid that they still shape pop culture.