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I’ve been watching the Olympics and the racial makeup of the runners has been striking.
In the marathon, there was a pretty even mix of races. Asian, white, black etc.
But in both the men’s and women’s finals of the 100 meters, every single one of the runners in the 100 meter finals were black. They came from the U.S., the Caribean, Europe and Africa, but all of them were black.
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Not “racial” but cultural selection, plus some variation in body types. Sprinters have to be muscular, with no penalty for being large, while long-distance types have to be shorter and more lean. These two requirements separate out different areas of the world. Kenyans, currently the leaders in long distance, tend to be somewhat shorter and leaner than Jamaicans or Americans.
Why runners as a group are a particular ethnicity is, I think, mostly cultural. In the US, Jamaica, Kenya, and other parts of Africa, running is an honored cultural heritage that goes back many many years. Local running clubs start kids out when they’re very young. I see most of the US clubs based in African-American communities.
Of course, in the US, sports has been a way for African-Americans to “succeed” (in a very limited) sense since the early 1900s. Denied other avenues of success, they could at least attain recognition and even renumeration through sports.
We forget that this was the way for all immigrants, the “lowest of the low” throughout American history. Irish, Italian, Greek, and Jewish immigrants in particular went into professions that nobody else would stoop to. For the African-Americans, sports was a big one.
And remember, before 1936 you probably wouldn’t have seen any African-American athletes at the Olympics because of pure and simple racial prejudice. Avery Brundage, the long-time head of the US Olympic Committee was a notorious racist and anti-Semite.