I think the "elephan curve" described above contradicts your point. We see 80% growth near the bottom of the world income distribution, and ~0% growth at the w

I think the "elephan curve" described above contradicts your point. We see 80% growth near the bottom of the world income distribution, and ~0% growth at the worst point for the American/ developed world middle class. If it was zero sum, there would have to be some negative growth somewhere. The whole world is lifting itself into wealth, despite the hand-wringing of pessimists. It's awesome!