Say instead of talking about why fat tissue accumulates too much energy, we want to know why a particular restaurant gets so crowded. Now the energy we’re talking about is contained in entire people rather than just the fat in their fat tissue. Ten people contain so much energy; eleven people contain more, etc.. So what we want to know is why this restaurant is crowded and so over-stuffed with energy (i.e., people) and maybe why some other restaurant down the block has remained relatively empty — lean. If you asked me this question — why did this restaurant get crowded? — and I said, well, the restaurant got crowded (it got overstuffed with energy) because more people entered the restaurant than left it, you’d probably think I was being a wise guy or an idiot. (If I worked for the World Health Organization, I’d tell you that “the fundamental cause of the crowded restaurant is an energy imbalance between people entering on one hand, and people exiting on the other hand.”) Of course, more people entered than left, you’d say. That’s obvious. But why?
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What do you feed a lion?
Meat.
Meat is the obviously correct answer. You would feed the lion raw meat. I think even the most ardent vegan would admit that lions are supposed to eat meat.
Lions hunt and eat animals, and they and their feline ancestors have been doing so for hundreds of thousands of years. Millions, even. That’s the key.
The hunting, killing, and raw meat-eating informed the evolution of the lion over many millions of years. The lion’s genetic makeup was shaped by meat-eating.
Humans are animals, too. We may be relative newcomers to this planet, but we’ve been around for a good 200,000 years, and our ancestors have been around for millions of years. And for a good 190,000 years of that, we were hunter-gatherers, living off the land, big game hunters who feasted on plant and animal alike. If you accept that the biology of animals, like lions, functions best on ancestral, evolutionary diets, wouldn’t the same likely be true for humans?
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