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."
Our faculties are co-evolved to allow certain niche behaviors and not others.
“Early humans simply couldn’t eat meat.” Donna Hart, Ph.D. & Robert Sussman, Ph.D. Man the Hunted: Primates, Predators, and Human Evolution
Respecting our co-evolved faculties enables ecology to work for us and enables us to support the general ecology.
Comparative Anatomy of Eating Chart by Milton Mills, MD.
| Facial Muscles
CARNIVORE: Reduced to allow wide mouth gape
Jaw Joint Location
Major Jaw Muscles
Mouth Opening vs. Head Size
CARNIVORE: None; swallows food whole
HERBIVORE: Extensive chewing necessary
OMNIVORE: Swallows food whole and/or simple crushing
HUMAN: Extensive chewing necessary
Length of Small Intestine
“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.”
“Because humans get atherosclerosis, and atherosclerosis is a disease only of herbivores, humans also must be herbivores.”
William C. Roberts, M.D., editor, American Journal of Cardiology
“Comparative anatomy teaches us that man resembles frugivorous animals in every thing, and carnivorous in nothing; he has neither claws wherewith to seize his prey, nor distinct and pointed teeth to tear the living fibre.”