Ethical decision making in a post-modern society

I have written an essay on postmodernity. I was limited by the essay question - a fact which frustrated me - and I ended up just writing this in an effort to cover criteria. It is extrememly flawed, and I'd love for commments on what people agree/dissagree with in it.

The essay does have an interesting 2nd half, on how post modernity affects ethical decision making, and how a christain can respond.

Part of the conundrum that is post-modernity is that it’s very essence defies definition. As Anna Aven writes, “pinning down postmodernism is like trying to stick Jello to a wall”