The latest Malthusian is none other than New York times Columnist : Thomas Friedman who recently wrote the article: The Earth Is Full, ( a play on his best seller — The World is Flat).
His quote: we are currently growing at a rate that is using up the Earths resources far faster than they can be sustainably replenished.”
Read the column here:
http://www.nytimes.com/2011/06/08/opinion/08friedman.html?_r=4&ref=columnists
If Friedman took one for the team and offed himself, then I might be impressed.
.....Well, maybe not a brain in Friedman's case.
The amount of life the Earth can hold has not remained constant over 4 billion years. It has increased as organisms become better at unlocking the energy in new environments. This idiot might as well look out over life in the Cambrian period where life was stuck in the seas and say "well, that's it...I guess the Earth is full!" Yeah, except that in subsequent ages, there would be huge forests spread out all over the land. Life adapted to take advantage of new environments.
Provided that life becomes more efficient at deriving energy from the sun, from geothermal sources, and from technologies like nuclear energy, the earth will be able to hold more and more life as time goes on.