>>12817672Obviously it comes down to the hunter-gatherer diet. A lot of meat and fish. No agriculture. The Neolithic brought with it a stark decline in physical size as well as diseases of civilization, which have been observed in Egyptian mummies.
The Neolithic didn't begin everywhere at the same time. Even in Roman times, Germanic regions were still densely forested and Germanic people lived in tribes and were described as tall and strong by Romans, who were an agrarian civilization.
