Hans Rosling (born 27 July 1948) is a Swedish medical doctor, academic, statistician, and public speaker. He is the Professor of International Health at Karolinska Institutet and co-founder and chairman of the Gapminder Foundation, which developed the Trendalyzer software system. He rose to international celebrity status after producing a Ted Talk in which he promoted the use of data to explore development issues.
How did the world develop? Worse? Better? See this video. 200 countries, 200 Years, 4 Minutes.