These days I am more used to hearing about how the British public (not to mention the rest of the wider world) objects to America's policies and ideals. Johnson sets out a way forward for the US to reclaim the moral high ground and to save itself, from itself.
This is the new global politics, away from the old left/right tensions of the 20th century, that is about pragmatic moral change on a world scale. It seeks to tackle issues such as world poverty and climate warming, and looks not to protect the rich and the powerful, or to destroy them, but to enrol them in this cause as powerful drivers of change.
Update (4th June, 2007) - I read an article in this week's New Statesmen magazine by Michela Wrong where she attacks Sachs for being simplistic:
"Sachs believes that Africa's salvation is ours to bestow. It's that simple. We have the know-how; all we need is a huge hike in western aid. History-lite, politics-free, unashamedly populist, his vision of the world is utterly appealing. It just doesn't happen to bear any relation to the world I live in. I guess that's why I find him so tiresome."
Wrong might have a point in that Sach's monologue was all about the message, but I can't help but feel that its an important motivational one. She recommends The Bottom Billion, by Prof. Paul Collier, as a more realistic read. I'll have to check it out.