See:
"Hominid Dietary Selection Before Fire."
Current Anthropology Vol. 25, No. 2 April 1984) 151-68.
Explains the constraints on human diet without fire.

Grain without the chemistry is indigestable consisting of flour, water
and fiber ( in French "papier mache"). It is not eaten by any species
of primate. The relationship between grain and cancer has been known
since 1843 when it was discovered that epidemological cancer rates
matched grain consumption everywhere in the world by the U of Paris
Medical School ( grain was the first idenified carcinogen being 120
years more mathmatically obvious than cigarettes). The reason for
this was only discovered in 2002 in Sweden ( google acrlyamides)when a
single slice of bread was assigned an Ames number of 300 ( cancer
ranking)- more than a full pack of cigarettes.

Potatoes are also undigestable raw yeilding less than 10% of their
nutritional value when eaten this way. They are also the most
chemically contaiminated food one can buy in America ( source
Smithsonian Magazine) and contain lectins that inhibit vitamin
absorbtion leading to a particular type of blindness caused by vitamin
A deficency. The British used the potatoes to enslave the Irish just
as the Incas had forced their vanquished foes to eat them in their
surender ceremonies.

Beans ( legumes) are by definition poisonous when raw containing
pesticides produced by these types of plants in nature. These include
neurotoxins that have been linked to Altzheimer's in the second
largest long-term nutrition study ever conducted ( U of Hawaii Medical
School. They also contain xeno-estogens that have been linked to
abnormal sexual development in children and agressive forms of
estrogen dependent cancers.

As to the history of the sucess of low-carb ( Paleolithic) diets see:

Knott,C. (1998). "Changes in orangutan diet, caloric intake and
ketones in response to fluctuating fruit availability." Int J Primatol
19: 1061-1079.
Seems apes have been doing the Atkins thing for tens of millions of
years though I'm glad I wasn't the guy following them around for two
years waiting to catch their urine falling from the tree tops to test
with ketosticks! BTW, pregnant and nursing females had the highest
levels of ketones. If a pregnant human is not in ketosis that
indicates gestational diabetes.

If you don't like my site visit www.paleodiet.com for more information
from scientists from around the world.

Ray Audette
Author "NeanderThin"
www.NeanderThin.com