Gary Taubes endorses the kind of hunter-gatherer diet I'm now on:
The latest clinical trials suggest that all of us would benefit from fewer (if any) sugars and fewer refined grains (bread, pasta) and starchy vegetables (potatoes). This was the conventional wisdom through the mid-1960s, and then we turned the grains and starches into heart-healthy diet foods and the USDA enshrined them in the base of its famous Food Guide Pyramid as the staples of our diet. That this shift coincides with the obesity epidemic is probably not a coincidence.
As for those of us who are overweight, experimental trials, the gold standard of medical evidence, suggest that diets that are severely restricted in fattening carbohydrates and rich in animal products—meat, eggs, cheese—and green leafy vegetables are arguably the best approach, if not the healthiest diet to eat. Not only does weight go down when people eat like this, but heart disease and diabetes risk factors are reduced. Ethical arguments against meat-eating are always valid; health arguments against it can no longer be defended.