200 Years, 200 Countries: Global wealth, health on video shuffleboard

Is national wealth a predictor of happiness? Some argue yes, others, no. David Brooks recently suggested that the national identity of the United States shouldn't be as chief wagger of this long global development tail, but, rather, as "champion of the gospel of middle-class dignity."

Doctor and statistician Hans Rosling's breathless call in 200 Years, 200 Countries, 4 minutes is raising questions and leaving a lengthy comment trail on YouTube.