I'm sure you're joking but anyway, any race out there doesn't need anything. You get enough of anybody in poverty and you'll get a higher proportion of slicksters. That's not race, that's circumstance (how many Mexican hockey stars are there? And in all the years of competitive bobsledding we know there's only been one decent Jamaican bobsled team - Cool Runnings, amirite?). That's life. How many Mongolian slicksters in the boxing have there been? Probably none, doesn't mean there can't be, just means the number of Mongolians in boxing are verging on non-existent. Probably busy taking apart walls somewhere.
In spite of my wall joke and what it may - incorrectly - reflect about me, I lose faith in humanity when we attribute a rather trite, superficial explanation as justification as to why someone is good at something. They woefully under-appreciate the historical context of our species. Boo-urns, I say!
Then again I heard the next all-star pgymy Nascar driver is just around the corner, turning left again, so what the f**k do I know anyway...