“The world has a very serious problem, my friend’ Shiva went on. ‘Poor children still die by their millions. Westerners and the global rich — like me — live in post-scarcity society, while a billion people struggle to get enough to eat. And we’re pushing the planet towards a tipping point, where the corals die and the forests burn and life becomes much, much harder. We have the resources to solve those problems, even now, but politics and economics and nationalism all get in the way. If we could access all those minds, though…”

“Whether we accept it or not, this will likely be the century that determines what the optimal human population is for our planet. It will come about in one of two ways: Either we decide to manage our own numbers, to avoid a collision of every line on civilization’s graph – or nature will do it for us, in the form of famines, thirst, climate chaos, crashing ecosystems, opportunistic disease, and wars over dwindling resources that finally cut us down to size.”