height is highly correlated with prosperity. lot more tall Koreans and Chinese today than 20 years ago, both here in the US and over in Asia. The Korean section of L.A. is nearby, and I see lots of 6' - 6'2" guys in their late teens, early 20s.
In my family, the Italians who were born and raised in Italy but then came over are all at least 6 inches shorter than their kids who were born here. Huge difference. My father was born there but raised here, and he's as tall as me, 6'1".