Modern diet fads, like paleo, farm-to-fork, the weird Food Babe's if-she-can't-spell-it-you-shouldn't-eat-it beliefs, harken back to a simpler time when people lived off the land, and nothing had preservatives and it was all Whole Grain.
In reality, ancient people could not work hard enough or fast enough to create food science that would prevent booms and busts of starvation and rationing. They wanted their food processed, to turn unpalatable or even toxic foodstuffs into something that could be consumed, and they even made progress doing it 10,000 year ago. First was the use of fires or pits and the invention of ceramic cooking vessels, and those led to an expansion of food preparation techniques.
In reality, ancient people could not work hard enough or fast enough to create food science that would prevent booms and busts of starvation and rationing. They wanted their food processed, to turn unpalatable or even toxic foodstuffs into something that could be consumed, and they even made progress doing it 10,000 year ago. First was the use of fires or pits and the invention of ceramic cooking vessels, and those led to an expansion of food preparation techniques.