I was raised in an environment where the concepts of good and evil were well established and clearly defined for me. Even now as an adult, the two are still clearly visible as a result of my conditioning. Whenever I read write, draw or dream, that duality is present, but I don't forsake it, since it has it's place in narrative structure. I enjoy creating a story where characters are faced with adverse conditions and must traverse them to survive or "continue."
I feel that a story doesn't necessarily need an antagonist to be progressive or to convey moral sensibility. As long as there is some vital clue to being a better human.
I have a small roleplaying session in which we are faced in the narrative with moral issues and must then figure out how to deal with them appropriately and at the same time think about the consequences of our actions. The idea of moral exploration is important so that one can choose their standing and defend it.