I guess I'd like to know when Ragu thinks the human diet was stable.
He seems to point to a date in the 60's or so when modified ingredients started to be used.
But, except for the rich, the human existence has been riddled with hunger and starvation, drought and war.
Meat and fresh fruits and vegetables? A balanced diet? Who had this until recently?
People, at best, ate locally and seasonally, and diets varied vastly across the globe. You were lucky if you had pickled, dried, salted, or otherwise preserved food to eat.
Only in modern history have the advancements in transportation, farming production, and refrigeration -- both in trucking and in the home -- allowed us to enjoy the abundance of food that is available to us year round, across the country/world.
But, even in my parents generation frozen food and canned food was much more prevalent. Without even considering something like aspartame, the diet I eat today is vastly different from what my parents grew up eating.