Norman Borlaug won the Nobel Peace Prize for the green revolution and understood the misguidance of efficiency as a strategy better than anyone. As a tactic it works under the strategy of managing population, as he said in his acceptance speech:
> "The green revolution has won a temporary success in man’s war against hunger and deprivation; it has given man a breathing space. If fully implemented, the revolution can provide sufficient food for sustenance during the next three decades. But the frightening power of human reproduction must also be curbed; otherwise the success of the green revolution will be ephemeral only. . . Most people still fail to comprehend the magnitude and menace of the “Population Monster”. . . Since man is potentially a rational being, however, I am confident that within the next two decades he will recognize the self-destructive course he steers along the road of irresponsible population growth."
We haven't curbed population growth. It's slowing, but we're in overshoot, which leads to collapse, and most projections still show us growing through 2100.
Luckily, have examples like Mechai Viravaidya in Thailand, who helped lower their population growth from around 7 children per couple to below 2 through voluntary means -- think the opposite of China's One Child Policy -- leading to greater stability and abundance. His TEDx talk: https://www.ted.com/talks/mechai_viravaidya_how_mr_condom_ma....