That was only an example to show that environmental influences start very early. Your environment continues to influence you until you die, even if that influen

That was only an example to show that environmental influences start very early. Your environment continues to influence you until you die, even if that influence in your final years is of a supportive nature. Many elderly people can live quite well in their homes they lived in since decades but once they come to a nursing home, they often become disoriented. And yes, medieval people were as intelligent as modern people. Many of the smartest minds of humanity haven't lived today but hundreds or thousands of years ago. I'd put all behaviorally modern humans are into the same category.