I don't know that the super-population-explosion that people keep fearing will really happen. For that to happen, a LOT more food will have to be created, which implies a more prosperous world as a whole. But more highly developed nations tend to have negative growth rates.

Reducto ad absurdem (maybe), but this implies that the solution to overpopulation is to bring the whole world's standard of living up. At which point we slowly allow ourselves to die off.