Geoff > it's just not correct to state that humans never got cancer in  
hunter-gatherer days

Who claimed that?  The only claim that's been made to my knowledge is  
that the rate of cancer is much, much higher since we abandoned our  
ancestral diets.

As for your comments about Taubes, he is a bit of a sensationalist  
when he writes his pieces for popular magazines.  But, reading his  
_Good Calories, Bad Calories_ book, his conclusions are inescapable,  
if only partial.  The obesity epidemic is almost entirely caused by  
dietary carbohydrate.

Jim