Ethics in a Mall Culture

"Postmodernity is, after all, a 'mall culture'...Aimlessly wandering through a mall with an incredible range of consumer options can be extremely tiring. It is not simply the multiplicity of options that tires us; at bottom is the inability to make a normative choice.
But people do act. People do make ethical decisions every day. The problem is that we have no way to argue definitively with each other about the grounds of those actions because all such grounds are the limited and idiosyncratic perspectives of our particular moral community at best, and our own consumer desires at worst. If ethical norms are socially constructed, and if all criteria by which we would judge the legitimacy of social contructs are themselves embedded in other social constructions, then we find ourselves in a situation where it is impossible to come to any final ethical decisions."
(J. Richard Middleton & Brian Walsh, Truth is Stranger Than it Used to Be, p.60)