I can't remember the source off hand, but pre-agriculural human skull size
has been shown to be somewhere around 10% larger than post-agricultural
humans. That suggests a larger brain size. I'm not sure we can assume a
higher level of intelligence in association with that larger brain, but it
would not be an unreasonable suggestion. Further, given the opioid and other
psychoactive peptides from the incomplete digests of gluten and dairy,
imparied function of the modern brain. Finally, the emerging recognition of
neurological and autoimmune damage caused by gluten, also suggests the
possibility of impaired intellectual function of moderns. Taken together, I
think the notion of devolution may have some validity.  I will look for
Weston A. Price's book, "Nutrition and physical Degeneration". 
Best Wishes, 
Ron    



Ron Hoggan, Ed. D.
co-author Dangerous Grains ISBN: 978158333-129-3 www.dangerousgrains.com 
editor: Scott-Free Newsletter www.celiac.com
"Objectivity is the prerogative of objects."