Wow that "average guy" from the 40s is hot. But I'm pretty sure all of those people pictured are from the current generation
my grandpa was about 5'2 when he died, he was born smack in the middle of the 1920s and was badly malnourished. allegedly when he was 18 he could carry an 80 pound millsack on each shoulder. but, from what i've seen of his tiny, starved frame, i doubt this.
when they talk about "the good ole days", people forget how common starvation used to be in the US, and still is in some places.