Love these quotes:
The only other uncontested nutritional fact, is that the more a culture deviates from its traditional diet, towards a more Westernised, modern diet, the fatter and more ill they become. Traditional diets can be extremely varied, from the high fat diet of the Inuit, comprised mainly of meat and fish, to the high carb diet of the Kitavans, comprised mainly of plant foods and honey.
We get fat, because we have stopped eating real food (plants and animals), and started eating food products that have been manufactured in a factory.
What to do about it? Stop eating food products that have been manufactured in a factory, and start eating real food again.
Of course the solution in the article, to only eat meat, eggs, fish, vegetables and fruits, and herbs and spices isn't going to work for a vegetarian.