An article discussing him here.
In my younger days world poverty was a big issue: could Europe and the US ensure the Third World developed fast enough, overtaking the "Population Bomb", the title of a popular book in 1968 and The Limits of Growth by the Club of Rome. Such books inculcated a mindset which I still haven't overcome (nor, I think, have most other people), as was confirmed for me by a recent quiz on world economic statistics. Anyhow, Rosling was very effective in publicizing the great improvements in world living conditions. He will be missed.