The Food Race and Free Will

Booner [no longer around] said Aug 26, 2006, 2:17 PM:

 

Quinn says that population always expands to match the food supply.  He presents this as a biological inevitability, a law of nature, despite our birth control technology and our free will.

On the other hand, Quinn seems to believe that we can make changes in the amount of food we produce.  He is deliberately vague about the means, but he seems optimistic that a cultural change is possible, leading to less intensive agriculture, etc.

My questions for those who are more knowledgeable than I:

1. Can someone provide links to the scientific papers supporting Quinn's thesis?  (There are some broken links at ishmael.org.)

2. Is my understanding of Quinn's position correct?

3. If so, why does human free will apply to one side of the Food Race equation but not the other?