Here’s a very interesting video on the global trends in child survival rates and increasing prosperity of nations. You can see the correlation between health and wealth.
Hans Rosling is is Professor of International Health at Karolinska Institute and Director of Gapminder Foundation in Sweden. He studied both statistics and medicine and also developed the amazing graphical tool that he uses in the video.
Its by far one of the most interesting videos on statistics I’ve ever seen. While it’s not really related to making money, understand a correlation between seemingly non-related issues can often lead to money making ideas.