Without this kind of food production maybe we'd have 50% the carrying capacity, but 20% of the actual population. What's your utility function? Is it the total

Without this kind of food production maybe we'd have 50% the carrying capacity, but 20% of the actual population. What's your utility function? Is it the total happiness function that requires us to reproduce as much as possible even if conditions are shit, or is it the average happiness per person?