Hans Rosling is a master of using data and graphics to show the health and wealth of the world. By animating the data he shows how things have changed over time. I really like his approach to make it very clear what is happening. There is a definite trend towards health and wealth in the world... That's a reassuring thing. I also think its really interesting to see the effect of wars and disease on populations and how it makes their bubbles bounce around. Take a look for yourself.