Take a look at the brief description of a study of the calorie expenditure in one of the last existing traditional hunter-gatherer societies on earth: NY Times, Hunter-Gatherer.
The authors conclude decisively that there is no difference in calorie expenditure between the Hazda people in Tanzania and typical adults in the United States and Europe. They conclude that this finding suggests that “inactivity is not the source of modern obesity.”
Their recommendation to reduce the number of calories we eat is slightly off the mark–although they do particularly recommend eating less sugar, which is tantalizingly close to an endorsement of low carb eating in the very mainstream New York Times.
Times reporting is usually more like this: A lengthy article by the health writer Tara Parker-Pope in December, 2011 reviewed the steady failure of weight loss diets without ever mentioning low carb plans. The Fat Trap. I sent her an email but never heard back. Gary Taubes sent a rebuttal, but also hasn’t heard back.