"Night Falls; the traveler must pass down the village streets, between the houses with yellow-lit windows, and out into the darkness of the fields. Each alone, they go West or North, towards the mountains. They go on. They leave Omelas, they walk ahead into the darkness, and they do not come back. The place they go towards is even less imaginable to most of us than the city of happiness. I cannot describe it at all. It is possible that it does not exist. But they seem to know where they are going, the ones who walk away from Omelas."
-Ursula K Le Guin
The Ones Who Walk Away From Omelas