Humans have existed on all kinds of diets that would be considered
inadequate in various nutrients today. "A chicken in every pot" was
once a sweet promise of better living when chicken (or any meat?) was
a luxury. How many "historical" diets provided (or didn't) what we now
regard as an adequate mix of protein, vitamins, starch, etc.? The poor
may have fared better nutritionally by foraging for field greens to
add to grain than the rich with abundant supplies of meat and little
else. How 'bout some expert opinions here?