Logical Dietary Goals

After a lot of reading and researching it was apparent that a diet low in sugar (i.e. carbs), high in saturated fat, and moderate protein made the most logical sense. I am not going into details here but a couple quick simple logical arguments/thoughts that support these for those repulsed by the idea of "low-carb/primal" diets:


1. We evolved without abundant sugar and carbs over tens of thousands of years - does it really make sense to make carbs the main component of our diet? Nothing evolves that fast.
2. Our body fat is saturated, our brain is approximately 2/3 saturated fat, and cholesterol is essential for cell structure and repair - why avoid these if the body runs on them (and if you critically review the studies they really do not increase heat disease/deaths)?
3. Your body can make carbs from protein - but not protein from carbs - which is essential?
4. If you were surviving in a forest or any other wild area and could only eat what grew naturally or what you could kill - what would your diet look like? Have you ever seen any overweight true hunter gatherer's?