How narrow is narrow?

I was rereading Sally Fallon's review of Weston Price's Nutrition and Physical Degeneration, and came upon this:

Children born to parents who had adopted the so-called civilized diet had crowded and crooked teeth, narrowed faces, deformities of bone structure and reduced immunity to disease.

So round faces (and I don't meet chubby faces) are an indicator of health and good nutrition? If in a given population nutrition were healthy, would we see more round faces? And how narrow is narrow? Is it possible to inherit a narrow face? Or is it a product of development? Are there cultures were narrow faces are prized, and if so, are they overvaluing an unhealthy condition? (Much like in our culture, where extreme thinness is put forward by those who have control over fashion and the mass media as the ideal.)