Wizard writes, "Overpopulation is definitely at the top of the list, when it comes to the driver of our world's ills."
The earth could sustain the current population if not for the voracious appetites of the technologically developed countries. The earth's resources are being drained by unbalanced affluence. The health of our consumer-based economy depends on creating markets for flash-appeal products that are quickly consigned to landfills.
It is our lack of spiritual and social evolution that is un-sustainable. And it is doubtful that we will shift focus without cataclysmic necessity.