Platt calls on readers to cap their lifestyle. Live as if you made $50,000 a year, he suggests, and give everything else away. Take a year to surrender yourself. Move to Africa or some poverty-stricken part of the world. Evangelize…

I doubt that we’re about to see a surge of iPod shakers. Americans will not renounce the moral materialism at the core of their national identity. But the country is clearly redefining what sort of lifestyle is socially and morally acceptable and what is not. People like Platt are central to that process.

The United States once had a Gospel of Wealth: a code of restraint shaped by everybody from Jonathan Edwards to Benjamin Franklin to Andrew Carnegie. The code was designed to help the nation cope with its own affluence. It eroded, and over the next few years, it will be redefined.