I try to be conscious of what I buy and what I eat, and to take an interest in where things are made, by who, for how much, and so on. And yet, no matter how well I manage to do this, I remain a consumer. I might purchase fair trade coffee and chocolate, but I’m still addicted to coffee and chocolate. My wife tries to shop only for clothes made in the U.S., but she still really likes to shop. So I started wondering how much of this is just human, and how much of it is culturally constructed....