What's better? 5 servings of fruits and vegetable. Unrefined, whole foods. Water. Legumes and grains. Fish.
Combine such a "diet" with 1 hour of light exercise (for example walking) a day and I bet most people would be considerably healthier (all the better if they can do aerobic exercise a couple times a week, say on the weekend). Most impressive this is also normally a cheaper way to eat and doesn't have to taste bad.
"What's better? 5 servings of fruits and vegetable. Unrefined, whole foods. Water. Legumes and grains. Fish."
Cut out legumes and grains - those are not whole foods, but they are modern (in evolutionary terms) and processed, and detract from nutritional advantages of of real food: fish, meat, eggs, and vegetables.
You can easily get away with eating a lot of carbs; being physically active not only allows it, but often requires it.
One very interesting result is that some of the communities lived in incredible poverty and with significant physical exertion.
I'd recommend that you read the book (Why We Get Fat: And What to Do About It) and see whether he addresses your concern. Far from ignoring our sedentary society, Taubes makes a strong case for other factors.
I don't agree with the premise, for one thing there's a line or two about the science of metabolism as it relates to carbs and naught else to actually support the theory in the article, but alas the point of the article wasn't to prove, rather it was to disprove the methods of comparing diets typically used. That part it did well.