[Frumious Bandersnatch]

Six feet, eh? Kinda argues against the fact that evolution is making us grow taller.

[AntiGuv]

Well, except that we range to upwards of seven feet nowadays..

[Question_Assumptions]

A better diet is making us taller. There are plenty of post-WW2 Japanese and Koreans that are quite tall thanks to McDonalds and such.

[muir_redwoods]

Evolution doesn't make us taller, survival advantage makes us taller or shorter or wherever the advantage lies. Good nutrition will allow us to come up to our genetic height but we will, as a people tend toward the greatest advantage for survival in all of our traits unless we artificially interfere