I don't see what the difference is between his message of sustainability and what has been predicted in books like "The Population Bomb" for 40+ years – which couldn't have been more wrong. Whether you agree or not, please realize that he's suggesting a veritable monopolization of industry by major companies and, essentially, a one-world government. Large companies will help to create regulation on production of products. This leads to increased cost for production, which large companies can more easily distribute among their large consumer base. Of course, that won't be enough. We'll need a single government to regulate who gets resources and who doesn't. Forget the idea that the US consumes more than other countries because the US produces more than other countries. Forget that those other countries benefit from this production – often times at no cost to themselves.
The moral of his story is that if we all sat around and ate ants with sticks 12 hours a day than the earth could support 3X the current population – YAY! No, my friends, the answer is to promote freedom of thought and industry. Promote research in nuclear fusion and, as Stephen Hawking suggests, migration to and population of other planets. That is the only way we will survive as a species.