Dr. Anthony Chaffee presents compelling evolutionary evidence showing how meat consumption drove human development over millions of years. Starting 2.5 million years ago during the ice ages, early humans became apex predators and experienced the fastest brain growth ever recorded in the fossil record, along with significant increases in height. This hyperc carnivorous lifestyle continued until agriculture emerged 10-15,000 years ago.

The transition to plant-based agriculture triggered an immediate evolutionary reversal - brain volume dropped 11% in men and 17% in women within just a few generations, height decreased by 5-6 inches, and chronic diseases appeared for the first time. This pattern repeated wherever agricultural societies emerged, including recent examples with Native Americans and Aboriginal Australians who experienced rapid health decline when forced onto Western diets. Dr. Anthony Chaffee explains how essential nutrients like B12, D3, K2, and saturated fat found exclusively in animal products are critical for proper brain and body development.

Key Takeaways

  • Human brain size increased exponentially for 2.5 million years on a carnivore diet, then dropped 11-17% within generations of adopting agriculture 10-15,000 years ago
  • Essential nutrients including B12, D3, K2, retinol, DHA, EPA, choline, creatine, and saturated fat can only be obtained from meat and animal fats for proper brain and nervous system development
  • Native Americans were the tallest humans on Earth in the late 1800s, but height decreased dramatically across three generations after losing access to bison and adopting agricultural diets
  • Chronic diseases like diabetes, heart disease, and cancer only appear in populations after transitioning from traditional carnivore diets to plant-based agricultural diets, as documented consistently across cultures and time periods
  • Human Evolution and Carnivory - Brain Growth During Ice Ages
  • Agricultural Revolution Health Decline - Brain Size and Chronic Disease
  • Native Americans and Dental Health Degradation on Western Diet
  • Dr. Weston Price Findings and Essential Animal Nutrients

This is an auto-generated transcript from YouTube and may contain errors or inaccuracies.

Well, if humans aren't carnivores, then explain this. Millions of years ago, when our ancestors started eating more meat, their brains and height started to increase rapidly. Two and a half million years ago, when the ice ages started, homohabilis went up into the ice, hunting megapona, and turned into apex predators, top of the food chain, and that's how they survived. With this change into hyperc carnivory, becoming an apex predator and being able to eat largely, if not exclusively, meat, especially in the Arctic Circle during the ice ages, our evolution increased exponentially in our height and brain size. It was the fastest growth in brain size that we've ever measured in the fossil record. This continued until about 10 to 15,000 years ago when there was a sharp decline. Instead of exponential growth, there was an immediate drop by 11% brain volume in men and 17% reduction in brain size in women. This reduction in brain size happened overnight from an evolutionary perspective. It happened within generations, not hundreds of years or thousands of years. Brain size reduced, height reduced by five to 6 in. There were signs of chronic disease and infectious disease, poor wound healing, smaller jaws, crooked teeth, and rotting teeth. Whereas before, we didn't see that in the fossil record. This is when evidence of chronic disease started to arise. And as far back as the ERS papyrus thousands of years ago in ancient Egypt, which was a large grain eating population, they have documented records of diseases that sound like diabetes, what we would call today Alzheimer's, and also the symptoms that people would get right before they dropped dead of a heart attack. Diabetes was first described by that name in 200 BC, 2,200 years ago, and has persisted in plaguing humanity since then. This decline in the height, health, and brain size of people when shifting from a pre-aggricultural carnivore-based diet to a post-aggricultural plant-based diet is seen everywhere around the world that it happened. Every time in history that it happened as well. We even saw this more recently with the Native Americans and Aboriginal Australians in the late 1800s when they were transitioned to a more western plant-based diet and their height, health, and brain size reduced immediately as well. There's a study called Tallest in the world published in 2001 that used original source data from the late 1800s where they measured people from all over the great plains in the Native American population such as the Cheyenne and found that they were the tallest human beings alive on earth at that time. The most interesting part of that study is that they say explicitly that the younger men were the shortest in the tribe. The fathers were much taller than them and the grandfathers were much taller than that because this study and these measurements were done after the bison were wiped out in America and their major food source was destroyed. Then they were put on the reservations and put onto a more agriculturalbased diet. And you see within three generations massive reduction in their height and health. Native Americans and Australian Aboriginals are some of the sickest individuals in both of those countries and they have a far higher rate of chronic disease than their European counterparts. This was also studied in depth in real time by Dr. Weston A. Price 100 years ago when he went around to indigenous populations around the world that were in the middle of transitioning to a more western diet approach. and he saw in real time the degradation in health development and jaw size, tooth decay, crooked teeth, and poor developed hard pallets and fallen dental arches. Whereas previous generations that had not transitioned the western diet had none of these signs of poor development. He found that he could reverse these in real time if people were still developing by giving them meat and animal fat. and he theorized that the development of the jaw and facial structures were dependent on fat soluble vitamins only found in animal fat. And this is confirmed in dentistry journals today. These findings are also all throughout modern-day anthropology where they show that the pre-aggricultural population still living their natural way with their natural diet don't get any of the chronic diseases that we get and yet they live as long or longer than people in western countries. Infant mortality rate is high. So the average life expectancy from birth is lower. However, when living to adulthood, they live just as long, if not longer. And what they die from are things like infectious disease and injury and famines, not the chronic diseases that we face in western plant-based civilizations. But then they say once they transition to western society and western diet, they start getting diseases of civilizations. And these diseases of civilization take over as the main causes of illness and death. This is what we commonly know as chronic diseases. So, diabetes, heart disease, cancer, autoimmunity, and so on. The brain and body require very specific nutrients that can only be found in meat and animal fats such as B12, D3, K2, retinol, DHA, EPA, choline, creatine, carnitine, and yes, saturated fat and cholesterol are all essential or beneficial to the proper development of our brain, nervous system, and bodies. And when people transition to a more plant-based diet, this marketkedly affects our health and development negatively.
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