I was shouted this on Digg today, and it’s a fascinating look at how the world has changed since 1809 in terms of life expectancy and wealth. Presented by Hans Rosling, the original is at Gapminder.
For more in the same vein, have a look at his TED presentation - one of the best presentations I’ve ever seen: http://jimdonovan.net.nz/2007/08/29/hans-rosling-one-of-the-best-presentations-ive-ever-seen/