Hans Rosling is Professor of International Health at Karolinska Institute, co-founder and chairman of the Gapminder Foundation, and frequent TED conference speaker.
One of his TED talks is found at the following link:
Some additional talks may be found via web search.
His TED profile is found at: http://www.ted.com/speakers/hans_rosling.html
The link to Gapminder is: http://www.gapminder.org/