I've always been interested in world trends, etc. It seems an issue having no shortage of renowned and super-rich proponents across the planet is overpopulation. From Ted Turner, Bill and Melinda Gates, Warren Buffett, The Rockefeller Foundation to name a few. I recently read some quote where Ted Turner has said that the ideal world population would be 300-500 million or approx 5-8% of the current world population.

I don't know how credible the math used in this site is, but I found it interesting: Overpopulation - Myth & Reality

Maybe it's not as critical an issue as a number of the super-rich apparently feel it is or maybe it's not an issue at all?

Chris L