Feeding people is, sad to say, among the least of our problems. One that, incidentally, we are lousy at already with 7 billion people in the world and a big fra

Feeding people is, sad to say, among the least of our problems. One that, incidentally, we are lousy at already with 7 billion people in the world and a big fraction hungry or food-insecure. It's not just a matter of waste or inefficiencies either. We're approaching resource limits. But yes, we could feed 10B people on rice and beans, for a time, and give everyone sufficient calories, for a time. There's still the little issues like global warming, poisoning of air and water, die-off of other species, and so on. Yes, population WILL peak sometime in the next 100 years, and growth is slowing, but we are already billions past what we can sustain now much less provide everyone with a decent standard of living, and adding billions more at a frightening rate.