This caught my attention when I was reading this book a couple days ago:
If the typical child is mildly to moderately malnourished, then that becomes the standard. That's "just how children look," not a problem to be fixed. Even I was affected by the constant stream of underweight children. After months in the field they began to look normal, and only severly malnourished children caught my immediate, conscious attention. Normal is what you're used to.
-Katherine A. Dettwyler; Dancing Skeletons: Life and Death in West Africa, Pp. 104