Gosh Isaiah (what a prophetic name), I believe your analysis missed a key factor. The green revolution of the 1970s dramatically increased agricultural productivity, allowing populations to continue to expand - but, in its wake it draw down water tables, increased agricultural pollution, and greatly increased deforestation and desertification. The solution was short term and has created a whole host of new problems. To simply assume some future genius will come up with another solution misses the fact that this far, our solutions are not sustainable, they just draw down the planet’s total resource base quicker.

And closed system has limits to growth. In nature, starvation is what happens when a species eats its whole food supply. You may quibble at what level the population will exceed earths ability to feed it - 10 billion, 20 billion, 100 billion? But at s