Comment Re:Who's "we"? (Score 3, Interesting) 63
People act like life expectancies have been getting shorter.
They romanticize historic and prehistoric diets alike, as if they were utopian; as if people somehow intuited what to eat, or else that the constraints of supply somehow shaped digestive evolution like an intelligently designed metabolic symphony of symbiosis. That ignores the plain reality of volatile supplies -- even after the advent of agriculture, but especially before it -- and the reality that evolution is not driven by perfect health or life expectancy; only by surviving long enough to reproduce.
Even if modern diets are "unhealthy" (whatever that means), that doesn't imply that people were eating healthier at any point in the past. In fact, skeletal records clearly show that human existence has been rife with scurvy, rickets, iron deficiency, and stunted growth. Nutritional deficiencies were the norm, not the exception. Now (many people) have abundance, and that presents its own challenges, but the notion of an ideal, historic nutritional baseline is pure fiction. It's turtles all the way down.
