The body needs fuel. But this need could be served by a rough diet of small
game, roots, and berries, as it was for several million years. Or, even more
extreme, pills could be synthesized to give us all we need (except bulk). But
our tastes have never been governed solely by nutrition. Modern
nutritionists chanted the litany of the four food types (vegetables, grains,
dairy products, meats) from which we were supposed to take more or less
equal amounts daily. But dairy and domestic meat fats are now considered
harmful, and a new food pyramid equally misleading is being touted