Actually, there were many things Ren hadn't mentioned.
The massive increase in grain production per unit area would lead to increases in cotton, vegetables, fruits, sugar, and livestock numbers, allowing more people to consume more nutrition.
During this process, both the population and the intelligence of sentient beings would improve significantly.
Because in the past, many people were dull-witted due to insufficient nutrition during childhood.
With a massive population increase and improved intelligence, the next step would naturally form a positive feedback loop with the magic-tech experts, further accelerating the evolution of magic-tech industry.
