"The popularity of these so-called caveman or Stone Age diets is based on the idea that modern humans evolved to eat the way hunter-gatherers did during the Paleolithic—the period from about 2.6 million years ago to the start of the agricultural revolution—and that our genes haven't had enough time to adapt to farmed foods."
We've evolved widespread lactose tolerance in a couple of thousand years and I'm supposed to believe that we haven't figured out wheat in 7000? We're apparently evolving so women can successfully have children later in life, and that's been going on for maybe two generations.
So I call BS.
BS like every other fad diet. I'm not *that* old, and have no interest in diets, and I've already seen the bread diet craze, the water diet, pineapple diet, low-fat diet, no-carb diet and now caveman diets. Every single one of these had plausible sounding excuses for why they would work that went something along the lines of "well your body [insert technobabble] so if you eat [insert types of food] you'll feel full while losing weight!"
And that's in my lifetime. If one looks even a *little* harder (which is all I've done, read one article on it years ago), you'll see this has been going on since people weren't continually starving to death, so basically the last couple of hundred years. For instance, about 400 (300?) years ago everything was mushy gains and/or covered in gravy. That's because "well, your stomach is a bakery, thats why it's warm, so we want to eat things that help the baking process". Then about 200 years ago we realized that was totally wrong. What you want to eat is meat and potatoes, because "well your stomach is a brewery, that's why you burp, so we want things that decompose down into liquids".
"It sounds like it should be that way" is not science, and turns out to be wrong most of the time. I suspect this latest fad will die just as quickly as all the other ones.