"In my opinion, you have out-of-control population growth, and you have fewer and fewer [resources]—we are heading for the biggest train wreck our civilization has ever come across ever. Ever. And I think that within 40 or 50 years, we’ll be there. If your population curve is on an exponential growth, and the resources are on an exponential decline, what happens first is you get increases in wealth discrepancy, which means that you get rich pockets of gated communities with security guards outside them, and you get more and more poverty outside that area. And the resources go down, and people start having resource wars over water and food and agriculture and arable land, and then you have Joburg in 2050. And you can see signs of it everywhere. It’s just overpopulation and lack of resources. We just aren’t in control of our destiny."