Eaton SB, et al. Diet-dependent acid load, paleolithic nutrition, and evolutionary health promotion. Am J Clin Nutr 30 Dec 2009 [epub ahead of print]Briffa says:
According to the authors of the editorial, few would deny that conventional nutritional advice is not working. And they suggest that what would help would be a more rapid shift in thinking towards a diet that gets us closer to “humanity’s biological baseline”. They quote a recent scientific paper  which asserts that “It is difficult to refute the assertion that if modern populations returned to a hunter-gatherer state then obesity and diabetes would not be the major public health threats they now are”.
Looks interesting. I am just going through the pdf now(thanks guys)