If dieticians studied anthropology then they would know that it is ignorant to say “our ancestors ate lots of vegetables.”
Wild plants were seasonal, sparse, fibrous, and low-calorie; meat provided the bulk of nutrition.
Discussion
Normal people don't salivate at the sight of a plate full of yard waste.
The plants that existed then, we now call weeds. Not edible.
Apparently kale is really versatile. It will fit into almost any garbage bin.
My ancestors consumed mainly beer, potatoes and rye bread. I traced that to 16th century, but it looks like it was the same deal since at least 12 century. Meat was somewhat rare. Now, almost everyone in my family is a meat lover. The one issue is that I have multiple family members with debilitating gout (i.e. they can't walk for couple days after eating meat...).
You are so convinced it’s convincing. What is your source for this?