As a counterargument, we're taking only a tiny amount of land that's feasible to develop, and even less of total area of Earth. Scarcity is caused by concentrat

As a counterargument, we're taking only a tiny amount of land that's feasible to develop, and even less of total area of Earth. Scarcity is caused by concentration of jobs in cities. Where there are jobs and education, there become cities. There's more than enough water to go around, but not energy to desalinate in drier places like China and India. There is a surplus of food in many areas, and most of lacking ones are limited by water. You cannot speak of an optimum without having decided a target. It's optimum everyone having their own private jet?