Essays / Thesis: The significance of setting in "The Life You Save May Be You" [5]

"The Life You Save May Be Your Own" Argumentative Thesis

I am writing an argumentative essay, and need to know if this thesis sounds good/ is arguable. It's pretty rough, but any helpwould be appreciated. This is what I have so far:

"The characters of Flannery O' Connor's "The Life You Save May Be Your Own" are ugly, despicable, and selfish, and they represent O' Connor's view of human nature as a whole. The reader is meant to take this as a direct look into their own lives."