[Matty]

Read more.

You're not talking about athletic superiority- you're talking about height; a polygenetic and highly variable trait which is inherited independently of skin color.

It is true that warmer climates prefer people who have higher body mass to surface ratio and longer appendages to give off heat, and the inverse to preserve heat in cold climates. More often than not, people living in warmer climates are also dark-skinned, but there are many populations which are an exception to the rule (again, refer to the large African pygmie populations); one trait does not indicate the other and again there is more variation within populations than between populations. This explains the penis thing; populations from colder climates have shorter thicker everything; including penises. It doesn't make them athletically superior; it just makes them taller on average. But that is not enough to explain the prominence of dark-skinned athletes in the U.S. Culture is the main cause there. Again, notice how many European whites are coming over here to play basketball (and all from poor countries). If playing sports professionally weren't such a long-odds gamble you'd see a lot more whites in the pros. There are whites out there in board rooms and running family businesses who could have been NBA all-stars if they'd dedicated their lives to it from a young age, like many blacks in America do. Look at Tiger Woods. You think he's genetically superior to every other person on earth when it comes to golf? No way. He was trained rigorously from a very, very young age to play golf. The same happens for more blacks in America than whites- their place in society gives them more drive to achieve athletic success.

IQ has already been studied. When education, environment, socio-economic status etc. are controlled for there is no difference between populations in IQ.

Again, alleles are inherited independently of each other, and there has been interbreeding between populations of [censored] sapiens since we emerged as a species. That means just because you know one phenotype of a person (say, their skin color) that does not give you any indication about any other phenotype they have. This is scientific fact. It is not something you can argue with based on what seems obvious to your own eyes.