Cengiz Belentepe writes,

I’m trying to find a very interesting interactive presentation on demographics and sociology that I believe you posted a link to on your blog last year. I believe the professor who did the research was Scandinavian and also designed some special software to display the results but I’m not 100% sure. I know this description isn’t much to go on but if you do recall the presentation, I’d love to know the professor’s name and have a link to his presentation.

He’s Hans Rosling, the software is Gapminder, and the link is here.