Human orders – scientific, artistic, social, economic, and political – are fictions. They are untrue, not because they necessarily are false, but because they necessarily are incomplete. All of our human orders, however inclusive we may try to make them, turn out to be some degree exclusive. And so we are always being surprised by something we find, too late, that we have excluded. Think of almost any political revolution or freedom movement or the ozone hole or mad cow disease or the events of September 11, 2001.