If aliens came to earth and started buying edible calories (let's suppose they theoretically only accept staple crops), We could ramp the production of edible calories on earth like mad.
Production right now is completely limited by oversaturated demand. Which is true of so much stuff right now.
More discredited "population bomb" thinking. The earth is not heading for overpopulation and there is no shortages in food generation. We produce so much extra food that we feed it to cattle and turn it into vehicle fuel at massive scales. More so, the productivity of farmland in rich areas of the world continues to increase every year, and that productivity increase still hasn't spread to large portions of the world's crop land in poorer countries.
It's to the point that there's serious discussion happening on just covering farmland with solar panels because there's so much excess of it and solar panels are getting cheap enough that it can be more profitable to put solar on farmland than to grow food on that farmland.
Green revolution wrecked Punjab in India. Pesticides, fertiliser and chemicals just so the west could sell these products to them, the result was more food and crop generated just to feed animal livestock rather than people.
When was the first one?
The Club of Rome few days ago admit that the Smart-city is impossible (it consume way to much resources) https://www.clubofrome.org/wp-content/uploads/2025/05/Transf... of course they keep insisting "we must find something else" (to steal private ownership). But the fact is that the Green New Deal works technically for single-family homes and sheds, nothing much bigger than that and those buildings actually use much LESS resources than dense areas with bigger buildings and can evolve as well.
The new New Deal, the one technically feasible is the old Distributism.
I can't say if it will be enough even for the current world population, but it's certainly much less resource intensive and much more efficient than the dense model needed by the nazi-2030's Agenda and it's the best we can do so far.
It's probably not so much population growth that's going to stress agriculture, but the transition of the global poor to a richer western diet -- lots of meat, a wide variety of fruits & veg available 12 months of the year, et cetera.