Originally Posted by PennyP
You have a good point. But lets say, for example, where I live, there are no large animals. The only animals in my area are lizards, occasional birds, mice, and cats, and something else in the rabbit family. No fishing in our area as there's no bodies of water nearby. So all we'd have to eat really are wild fruits, veggies, nuts, and wild grains and legumes. Because there isn't always so many meat sources available in an area. And I'm sure it was like that with the Paleolithic people. Which is why they probably eat grains. Because grains are filling. I may be able to get tons of nutrients from some edible weeds near me (some of them are the most nutrient dense foods of everything around), but they're simply not filling and if I'd eat that and the very little game available in my area, I'd be hungry. And probably malnourished because of not enough calories. So I probably would pick wild grains and legumes to supplement my diet. Have you ever picked wild grains? I actually have. Its not so crazy or as time consuming as you might think.
This is actually key to remember.
Human beings have adapted to almost every ecological niche on the planet. We are incredibly adaptable, and one big part of that is diet. As omnivores, as we moved out of Africa to fill almost all the continents, we encountered everything from plains full of big game to islands with little game at all. And we adapted.
I've read anthropology/archaelogy papers on the subject of the wild ancestors of wheat. It was actually relatively easy to walk across a stand of it and come up with a lot of food that you could take home and save for later. Easy enough that people in the fertile crescent at that time actually settled down in sedentary villages *before* domesticating anythiing. They had antelope, grains, lots of greens, and fruit and nut trees. The area was actually, when you read the descriptions of the foods available, "Edenic," and you can see how the memories of that time may well have given rise to the myths (across multiple cultures from the area) of a golden age of plenty.
Of course, then climate change (the Younger Dryas) came along and messed it all up. But it sounds nice while it lasted.
(My point above, about sustainability, was simply this: While some of us enjoy such a diet and benefit from it, in the end we have to accept its impossible for every human currently existing to eat that diet, without something happening to kill a large percentage of us.)