Hans Rosling, the Swedish statistician who transformed the way we think about development and data, died this week of pancreatic cancer, at the relatively young age of 68. I haven’t got the time to do a proper tribute to him, but Gap Minder, the research group to which he devoted the last ten years of his life, has assembled a formidable collection of resources which show how wealth and life expectancy have been transformed over the short and the long run.

The youtube video at the top of this post, filmed by the BBC, shows Rosling in action, with his 200 year history of the world, which is worth five minutes of anyone’s time.

The chart he’s using there is on the Gap Minder site, and lets you explore the trajectories of different countries or groups of countries. There’s a host of valuable resources on the site, such as the ethnographic work of Dollar Street, going into the homes of people across the world to see what different incomes mean in different places in terms of everyday living standards.

I’ll also miss Rosling’s Twitter contributions, which often were a reminder of how fast fertility rates were falling across the middle-income and lower-income nations of the world. Typically this is far faster than the comparable rate of change at a similar stage in most European countries, and his tweets were a reminder that the rate of global population growth was slowing down rapidly.