current levels of production can be maintained only with heavy use of pesticides,and chemical fertilizers.......huge tracts of rainforest that absorb co2 have been eliminated to facilitate cattle production...Bingo,
Richer countries have smaller families than poorer ones, for a variety of reasons. Population spurts occur when a nation grows wealthier and healthier, cutting the mortality rates of infants and children (in poor countries, those mortality rates tend to keep the # of surviving children around 2-4). So where before you had 8 or 9 kids because only 2-4 would survive, now 8-9 survive. As time goes on, those kids and their grandkids will average 2-4 kids in their own families (or maybe none) causing population growth to plateau. This of course doesn't take into account immigration, but families of immigrants also tend to follow this rule.
Any shortages are the result of distribution problems, which a market can correct for, but there's still the problem of rampant corruption that prevent markets from working and can rob countries of their resources.
I also take issue with comparing a market economy with natural selection. In the latter, a trait or idiosyncratic characteristic of an animal gives it an advantage in the wild and allows it to survive to pass on its genes. In today's economy, most of the wealth is inherited from a person's parents or grandparents, regardless of an individuals own intelligence or resourcefulness. In fact, I would argue that there are more resourceful and intelligent people in the bottom billion than there are in the top 1%. In this scenario, however, the bottom billion are the first to lose out.
..back in the sixties there was a group called zero population growth......it seems that many of their dire warnings of over population are coming to pass now....the world's population then was just over a billion.......just imagine the mountain of feces produced daily by a billion people, and the necessary water,food,fuel,infrastructure for survival by ten times that number