Funny you should pick height, since it is a classic case for the influence of the environment. Large differences in height between countries today is primarily

Funny you should pick height, since it is a classic case for the influence of the environment. Large differences in height between countries today is primarily due to the environment. The dutch are the tallest today, but used to be the shortest in Europe. White Americans used to be far taller than Europeans but today Americans are relatively short in comparison to most European nations. Japanese used to among the shortest in the world but the young generation has almost caught up to the American average. As for math, why have Russia and the Soviet Union won so much if Asians have such advantage? They have much smaller population than China? Why does Hungary have so many wins? How many asian immigrants do you think they have? Considering the small population of Hungary they are completely outperforming China.