Shattering The Meat Myth: Humans Are Natural Vegetarians
Dr. T. Colin Campbell, professor emeritus at Cornell University and author of
The China Study, explains that in fact, we only recently (historically speaking) began eating meat, and that the inclusion of meat in our diet came well after we became who we are today. He explains that "the birth of agriculture only started about 10,000 years ago at a time when it became considerably more convenient to herd animals. This is not nearly as long as the time [that] fashioned our basic biochemical functionality (at least tens of millions of years) and which functionality depends on the nutrient composition of plant-based foods."
That jibes with what 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."
http://www.huffingtonpost.com/kathy-freston/shattering-the-meat-myth_b_214390.html