You know that point when you realize that you just can’t keep buying more crap? Many families call it "December 26." Thomas Friedman calls it the Great Disruption. Saul Griffith has a more compelling framing. A sustainable future society, he says, will be a Rolex and Mont Blanc society. That is, when you are born, you get a Rolex and a Mont Blanc pen. And that’s it. No Swatches to match your outfit. No gimme-pens from the Holiday Inn. It’s an appealing aesthetic.