Track doesn't pack up stadiums like footbal or baseball, but it still has a lot of exposure; a lot more than many countries in this world. Our 3 divisions of NCAA plus the NAIA, JUCO and the thousands of High Schools around the nation that have track programs should expose some talent, don't you think? And they do actually. If you check the year lists, we do have about 70 to 80 people under 14 min for 5k and 3.45 for 1500m every year.That's better that many other countries around the world!
And if East Africans had our system (not our lifestyle!)they would be running 11 minutes for 5k.
When people say "they ran to school and that's why they are good!" is partially true. Evolution was at work there for thousands of years.The climate,their lifwstyles, the simple foods they eat yielded a light, compact and resilient body that could live under those conditions. It's called "survival of the fittest"
You take a caucasian baby who has the genetics of being big-boned person and try to raise him in Kenya. Make him run to school when he's 7 or whatever. He's going to be late for school every day, if he even makes it!
There are other people in the world who live like the East Africans but their distance running "prowess" is actually worse than ours.
Something unique is happening in that part of the world which is East Africa.
Something unique also exists in West Africa as well.For some reason, evolution over there created people with huge glutes and quads - bodies that are made for sprinting.
That is why the US has world class sprinting, and most rivals are also comming or have ties to that part of the world (Nigeria, Ghana, Jamaica etc)
If slave ships went to East Africa instead, the US would have distance runners today, especially with the system that we do have in place.