Rojo, I'm disappointed, the Coach who once believed he could turn any 9:30 high school two-miler into a world beater breathed his last with that post...
Let's start with "comparative advantage" and your dismal science conclusions. I agree that people do what they are good at, but being good at something and finding value in that something are two very distant realities. Sure Chinese and Indian people would love the BENEFITS that accompany professional running, but what culture of running exists within these places that would lend a young person to engage in the grueling activity, especially in the oppressive heat and humidity of Calcutta, or the choking pollution and smog of Beijing?
Let's not forget that Kenya was a British colony and athletics was routinely used as part of "muscular Christianity" within every mission and school since the late 1800's. Cattle raiding was supplanted by track races to help curb the tribal wars and property theft. Tea Plantation owners often held distance races featuring their workers and would offer prizes to the winner. Kip Keino's father was given two gallons of oil for his victory in one of these events. I could go on and on, but the point is that these seeds of track and field, and specifically distance running, continued to grow with Kenya's success over the years until the inclusive, elite and profoundly optimistic culture of running that we both saw in Iten became the self-perpetuating system of athletic production that dominates our sport today.
Now you could argue that India was also a British colony, but different cultures take to different activities, as Cricket demonstrates. For East Africa, the combo of colonialism, Rift Valley geography, and Kenyan physique is no question a perfect combination for manifesting the world's best distance runners.
If we are going to argue about the numbers of American participants and Kenyan participants in the sport, let's not forget that in the American system of sport, athletes that do not reach an extremely high level by there 21st birthday often need to find another line of work. For runners, the cut off is even more severe, as only a handful of guys go pro, such as NCAA champs and the rare post-collegiate. The amount of lost talent in track and field is the equivalent of holding an NFL draft but only having one round. How many distance running Tom Brady's have been lost to this highly selective system within American sports culture? By comparison, serious Kenyan runners only begin training following high school and often spend 6 years training before running a single race. I was told first hand by Abel Kirui that I could not achieve my running potential until I was 26 years old, imagine how much better American distance runners would be if COLLEGE served the role high school does now, and we all had another 4 years to keeping training at an elite level. I'm willing to bet that we'd have a better showing at World XC.
Now, another key thing to remember is that "Kalenjin" is a descriptive term that came about in the 50's to unify rural kenyan tribes under a political banner. Kalenjin translates roughly to "I say to you", and to claim that there is a gene within the Kalenjin tribe that helps its members run fast is like saying there is a gene within the democratic party that provoked its members to approve Obamacare.
Boom. Roasted...