Right now, human civilization is building a world where the vast, vast majority of people have no place. We have the first world, composed of developed, mostly consumer-driven economies with advanced technologies and stagnating population growth. And we have the third world, where the population is exploding and people still live the way they did ten thousand years ago—for the most part. All of these people are living on the same planet—a planet with only so much land, so much water, and so much food. In short, there is a limit to how many people Earth can support. Without intervention, at
...more