I do not disagree with you, yet I still like to add some comments.

The 20th century was never dieoff at all on a global scale which is what matters.

The jews might feel like it was.

Even during Mao's cultural revolution that supposedly saw tens of millions die, the global population increased.

The huge famines that Mao caused are called the "Great Leap Forward" and actually did cause a dent in population growth. Not for long though, and with small impact.

http://www.iiasa.ac.at/Research/LUC/ChinaFood/data/pop/pop_10.htm

The last time global population decreased was during the plagues of the medieval era.

Oddly enough that dieoff did not lead to a collaps of society.

Society was in a very low state of organization anyway during the plagues. Remember the feudal system? And even within the feudal system there were breakdowns of individual fiefdoms so you don't see any monolithic collapse because society was not monolithic, even though there was a nominal "king" of a region. In those fiefdoms was a high degree of independence of other fiefdoms. So the collapse of one did not affect the others around it too greatly other than to present an opportunity to expand their own fiefdoms.

The modern situation is far different with extreme specialization of labor, huge interdependences, etc. A massive fire in one memory chip factory in Asia back in the early 1990s caused global repercussions. At one point in time, a Wisconsin company made 80% of all hard disk read-write heads in the world. The global economy is far more fragile than you realize. There are not hundreds of memory chip manufacturers. There are not hundreds of aircraft builders. There are not hundreds of electrical transformer manufacturers. These manufacturing areas that I mention are so small yet so key to industrial civilization that they each represent near single points of failure and these areas are not alone.

"I was in New York in the 30's. I had a box seat at the depression. I can assure you it was a very educational experience. We shut down the country because of monetary reasons. We had manpower and abundant raw materials. Yet we shut the country down." -- M. King Hubbert.

One great danger to society is these very narrow areas of specialization coming up against economic collapse in the geographic region where these things are made. How do you restart the modern economy? Economists last year met and discussed this issue at a US government sponsored conference and concluded they had no idea how to restart it. This may be why Ben Bernanke, when faced with the choice between inflation and deflationary collapse has vowed to choose inflation?

Ghawar Is Dying
The greatest shortcoming of the human race is our inability to understand the exponential function. - Dr. Albert Bartlett