More complete BS from you. Are you going to answer my question or not: what makes so qualified to speak so confidently and absolutely on the topic of nutrition? I am waiting.........
And what is the reason why the "active....aren't as lean lean as their fellows who are..... eating and exercising the same" ??
1) Insulin is an essential hormone for energy balance and very important for building muscle and storing glycogen, which are not "weird things". Don't demonize insulin.
2) do you know what REALLY does "weird things" to our calories and bodies? Not insulin, but insulin RESISTANCE. What is the main cause of insulin resistance? Not too many carbs and thus too much insulin production, but excess calories, sedentary lifestyles, and excess fat and definitely excess sat fat. Diabetes is not mainly due to too much carb intake, it simply is not.
3) Protein raises insulin, sometimes as much as carbs. Are you going to cut way back on your protein now?
Excess fat calories do not promote thermogenesis. Excess dietary fat calories get turned to body fat more efficiently than do excess carb calories. So modest surpluses of carbs beyond immediate energy and metabolism needs are not stored as fat, but as glycogen, but even modest surpluses of dietary fat will mostly be stored as body fat.
If eating lots of carbs as grains were so likely to lead to becoming fat, why did take it take 10,000 years of grain consumption to finally lead to obesity? People have been eating grains and high carb diets for a loooong time, but it has only been the last 30 years that the Obesity epidemic has struck, and that is mostly due to excess calories, excess fat, and sedentary lifestyles. The paleolithic evolutionary diet concept is looking at the very recent obesity epidemic and acting like it has coincided with consumption of grains and milk to make their argument. It has not. What has coincided with obesity is the very recent modern western lifestyle: sedentary living and a diet full of fast food filled with calorically dense, nutritionally low foods: high fat hamburgers topped with high fat bacon and high fat cheese, incased in refined grain bread, and topped off with high fat french fries and a super sized gallon of pure refined sugar in the form of soda. Your correlation of the timing of agricultural revolution and obesity is only about 100 centuries off.