[throwaway0a5e]

>We haven't improved efficiency at all, it takes far more resources to keep a person going today than it did in the 14th century.

We very much have. We couldn't support our population with 14th century levels of efficiency. We wouldn't have enough farm land, fresh water, etc, etc.

[simoom22]

He might mean energy efficiency. We just have access to way more energy these days, and we've been slurping that milkshake hard.