Well…… you all know what I think.
A paper on this topic was published last month by Paul R. Ehrlich and Anne H. Ehrlich in the Proceedings Of The Royal Society. The link below will give you a chance of reading it.
Environmental problems have contributed to numerous collapses of civilizations in the past. Now, for the first time, a global collapse appears likely. Overpopulation, overconsumption by the rich and poor choices of technologies are major drivers; dramatic cultural change provides the main hope of averting calamity.
Read the full paper here : http://rspb.royalsocietypublishing.org/content/280/1754/20122845.full