The Ones Who Walk Away From Omelas

I would like to say that I would walk away from Omelas but I'm not sure if I would. When you have something good even when you know its wrong its hard to give it up. All the people in Omelas know that it is wrong to  torture that child, but they are to greedy to do the right thing and have their happiness taken away. The ones who do walk away those are the strong ones who are willing to give up what they have for someone else. I wonder though why the people who walk away don't help the child instead of just walking away?