A new Hans Rosling presentation is always worth featuring on The Interpreter. The man behind Gapminder and one of the break-out stars of TED, Rosling here demonstrates the incredible progress made by African countries and the importance of data and measurement to chart future progress:

Bill Gates features this video in his annual letter on his Foundation website:

...in the past year I have been struck again and again by how important measurement is to improving the human condition. You can achieve amazing progress if you set a clear goal and find a measure that will drive progress toward that goal...This may seem pretty basic, but it is amazing to me how often it is not done and how hard it is to get right.

(H/t 3QD.)