We have to solve climate change because if we don’t solve climate change but we deal with a nuclear holocaust, we’re finished. If we solve climate change and don’t have a nuclear holocaust but we continue with unsustainable resource use, we’re finished. And if we deal with the nuclear problem and climate change and sustainable use, but we maintain or increase inequality around the world, we’re finished. So, we can’t prioritize. Just as a couple in a marriage have to agree about sex and children and in-laws and money and religion and politics. We got to solve all four of those problems.
Today, the risk that we’re facing is not of societies collapsing one by one, but because of globalization, the risk we are facing is of the collapse of the whole world.
How likely do you think that is? That the whole network of civilization would collapse?
I would estimate the chances are about 49 percent that the world as we know it will collapse by about 2050. I’ll be dead by then but my kids will be, what? Sixty-three years old in 2050. So this is a subject of much practical interest to me. At the rate we’re going now, resources that are essential for complex societies are being managed unsustainably. Fisheries around the world, most fisheries are being managed unsustainably, and they’re getting depleted. Farms around the world, most farms are being managed unsustainably. Soil, topsoil around the world. Fresh water around the world is being managed unsustainably. With all these things, at the rate we’re going now, we can carry on with our present unsustainable use for a few decades, and by around 2050 we won’t be able to continue it any longer. Which means that by 2050 either we’ve figured out a sustainable course, or it’ll be too late.