Look at the book 'Nutrition and Physical Degeneration' [1] by Weston Price [2], a dentist who travelled around the world in the 1930's comparing facial development and health of traditional cultures eating unprocessed diets to those who switched to a western diet.

There's also the more recent book 'Jaws' [3] looking at the orthodontic industry and ideas John Mew.

[1] https://gutenberg.net.au/ebooks02/0200251h.html [2] https://en.wikipedia.org/wiki/Weston_A._Price [3] https://www.goodreads.com/book/show/35804366-jaws