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Have Humans Adapted to Eating Meat and Does it Even Matter?

March 2, 2015

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Have Humans Adapted to Eating Meat and Does it Even Matter?

It is a question I’ve answered many times on this blog, so I decided it deserved its own post.

From Huffington Post article, Shattering the Meat Myth:

Physicians Committee for Responsible Medicine President Dr. Neal Barnard says in his book, The Power of Your Plate, in which he explains that “early humans had diets very much like other great apes, which is to say a largely plant-based diet, drawing on foods we can pick with our hands. Research suggests that meat-eating probably began by scavenging—eating the leftovers that carnivores had left behind. However, our bodies have never adapted to it. To this day, meat-eaters have a higher incidence of heart disease, cancer, diabetes, and other problems.”

There is no more authoritative source on anthropological issues than paleontologist Dr. Richard Leakey, who explains what anyone who has taken an introductory physiology course might have discerned intuitively—that humans are herbivores. Leakey notes that “[y]ou can’t tear flesh by hand, you can’t tear hide by hand…. We wouldn’t have been able to deal with food source that required those large canines” (although we have teeth that are called “canines,” they bear little resemblance to the canines of carnivores).

In fact, our hands are perfect for grabbing and picking fruits and vegetables. Similarly, like the intestines of other herbivores, ours are very long (carnivores have short intestines so they can quickly get rid of all that rotting flesh they eat). We don’t have sharp claws to seize and hold down prey. And most of us (hopefully) lack the instinct that would drive us to chase and then kill animals and devour their raw carcasses. Dr. Milton Mills builds on these points and offers dozens more in his essay, “A Comparative Anatomy of Eating.”

The point is this: Thousands of years ago when we were hunter-gatherers, we may have needed a bit of meat in our diets in times of scarcity, but we don’t need it now. Says Dr. William C. Roberts, editor of the American Journal of Cardiology, “Although we think we are, and we act as if we are, human beings are not natural carnivores. When we kill animals to eat them, they end up killing us, because their flesh, which contains cholesterol and saturated fat, was never intended for human beings, who are natural herbivores.”

If humans were “designed” to eat meat, why is it that most of our leading causes of death are directly linked to the ingestion of animal proteins (yes, even when it’s organic, boiled and skinless)? Why are vegans generally healthier and live longer lives? Doesn’t sound like our bodies have adapted too well to these products yet, if they’re still killing us. I’ve never heard of a lion with high cholesterol, after all.

Here’s a chart of our anatomy, compared to other animals:

Noting the similarities, I think it’s safe to conclude that we have indeed developed to be herbivores (specifically, frugivores).

But does any of our evolutionary background even matter in terms of modern-day veganism? I would say no. Since it is apparent that humans can thrive on a plant-based diet, it seems entirely irrelevant what we may have adapted to eating in the past.

So the question isn’t ‘is meat healthy’? (it isn’t) or ‘did our ancestors eat meat’? (they didn’t) or‘do our bodies align with meat-eaters’? (they don’t). The question is ‘if we can live long, healthy lives without animal products (we can), why do we continue to exploit and abuse sentient, feeling beings?’ The answer is in the hands of carnists because I can’t see any way to justify it. Maybe they think “humane” meat is better, but if the whole process of breeding, enslaving, and killing animals is unnecessary (and actually, very unhealthy) how can we defend it at all?

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we can all adapt eating just plants
yes we can…no time for “can’t”

Karen Lyons Kalmenson

9 Comments leave one →
  1. March 2, 2015 9:45 am

    I love the infographic; very informative yet concise.

    Liked by 3 people

  2. karenlyonskalmenson permalink
    March 2, 2015 10:14 am

    we can all adapt eating just plants
    yes we can…no time for “can’t”

    Liked by 3 people

  3. March 4, 2015 5:58 am

    Awesome. Great post and I loved the graphic.


  4. Emy Will permalink
    March 12, 2015 11:29 am

    Some sound arguments for veganism. Thanks, stacey ❤


  5. Adrian P Williams permalink
    January 3, 2019 12:38 am

    You’ve correctly identified the root problem: all the bitty arguments against veganism (“We have carnivore teeth!”) are a moot point. It doesn’t even matter if they’re true or not. The question is, so what? If I had the teeth of a lion, I’d still be vegan to the best of my ability. Because pointy teeth or no pointy teeth, I am human, and I have reason & compassion.

    Liked by 1 person

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