Latest tidbit from Lives of the Trees: Chestnuts have protein like other nuts, but they also have starch, which makes them more filling than other nuts. "Before wheat was common and potatoes came to Europe, chestnut bread kept many poor people alive."
My grandmother has talked about people surviving the Depression by eating food they found in the woods. Could we do that now? Many of us don't live near the woods. Many of us wouldn't know what to eat if they did go to the woods.