I think we need a complete inversion of reasoning, similar to how I rub most entrepeneurs the wrong way because I'm from the "data is a liability" camp, rather than "data is the new oil" or whatever The Economist sold you.

The important number isn't two thousand calories per day; it's how much you excrete, excrude, and expel per financial quarter, and whether the resulting output gets used in any intelligent way. Industrial capitalism profits this problem away by seeing that the firsthand consumer paid for goods this week, and thus producing some amount of goods to sell the next; and urban civilisation copes with the individual productions by providing various waste management services. So I'm not too pressingly worried about industrial capitalism and its future, if you'll excuse the reference...

However, our thinking is still lacks the holistic perspective. We're still chasing the two thousand calories, rather than asking ourselves, "am I giving the world some good shit?"