When people survived by the sweat of their brow, they thrived on greasy food without being transformed into obese pigs.
We are genetically predisposed to crave the taste and mouth feel of fat. There are nine calories in one gram of fat but only four in a gram of carbohydrate, regardless whether you're talking brown rice or sugar. You only need half as much fatty foods (by weight) as carbo-rich foods to survive. Being predisposed to favour fats over carbohydrates left us better prepared to survive the lean times.
Before the advent of conveniences like the refrigerator and the supermarché, especially among people who did hard manual labour for a living, the fatty diet was essential to receiving enough nourishment to support their energy expenditures.
Which creature is the leaner, the carnivorous cheetah, or the grain-fed hog? Do you think the cheetah could manage to sprint to 110 kph if it were fueled only on parsnips and acorns? The physical configuration of any animal has far more to do with its lifestyle than with what it eats (although how it lives also necessarily has to be supported by whatever it fuels on).
What turns people into blimps is not the fatty diet, it's the sedentary lifestyle. That and the fact that meat actually has something plants in general lack: flavour. We will tend to overindulge on meat because we actually
enjoy the eating experience and don't have to force down bushels of it.
Before you buy into this plant worshiping, and especially if you believe the vegetarian/vegan thing is kinder to the planet, or is the path to "social justice," you should read this:
An excerpt:
"Carnivores cannot survive on cellulose. They may on occasion eat grass, but they use it medicinally, usually as a purgative to clear their digestive tracts of parasites. Ruminants, on the other hand, have evolved to eat grass. They have a rumen (hence, ruminant), the first in a series of multiple stomachs that acts as a fermentative vat. What’s actually happening inside a cow or a wildebeest is that bacteria eat the grass, and the animals eat the bacteria.
"Lions and hyenas and humans don’t have a ruminant’s digestive system.
Literally from our teeth to our rectums we are designed for meat. We have no mechanism to digest cellulose..."
We omnivorous humans have the largest brains and the smallest digestive tracts of all primates, relative to body size. Vegetarian gorillas have the smallest brains and the largest digestive tracts. The adoption of carnivorism was the single greatest adaptation allowing early
Hominini to evolve discretely from the rest of the
Hominidae, an event known to date back at least to
Australopithecus, four million years ago. We never could have evolved to bipedalism with a belly the size of a gorilla's. Or developed a human-sized brain while maintaining the power of the gorilla's nut and grain-crushing jaws. It also was a crucial step toward
H0mo Habilis, the tool maker, and the genesis of man's attempts to rule over his environment.
Our ancestors did not spend 4,000,000 years endeavouring to place their offspring at the apex of the food chain so that we could feast on tofu and watercress. And I will not dishonour their memory by fating my descendants to a return to the trees by teaching them that the buffaloes and the antelope have a better idea.
VIVA LA STEAK!!!