[multi]

It is what it is, and neither Mother Nature nor the Laws of Physics are open to negotiation.

http://www.paulchefurka.ca/WEAP/WEAP.html

In any event, if the conclusions of this model are anywhere close to correct all these arguments are moot. Energy constraints will trigger a reduction in population starting within 20 years, and the impact of those constraints will far exceed anything that such humanitarian measures could accomplish. In fact, if the model is correct, there will be no ongoing overpopulation problem at all, as natural processes intervene to bring our numbers back in line with our resource base.

This leaves the question of what such a population decline would look and feel like. The details of such a profound experience are impossible to predict, but it's safe to say it will be catastrophic far beyond anything humanity has experienced. The loss of life alone beggars belief. In the most serious part of the decline, during the two or three decades spanning the middle of this century, even with a net birth rate of zero we might expect death rates between 100 million and 150 million per year. To put this in perspective, World War II caused 10 million excess deaths per year, and lasted a scant 6 years. This could be 50 times worse. Of course, a raw statement of excess deaths doesn't speak to the risk this will pose to the fabric of civilization itself.