OH yeah? Trust me, it's pretty dominant. Ever taken a look at the all-time world lists from 1500-marathon??? one small region of the planet (east africa) owns ~90% of the all time top 25 performers in these events. Ethiopia and Kenya have won top 2 in world cross team titles for as long as I can remember, and now the women are nearly as dominant. ~98% of major marathons the last decade or so have been won by africans. In Sprints talent matters more, but in disance running it matters too and clealry the cream of the east african crop is way beyond the cream of the european/white crop.
See above, it IS nearly as dominant.
Oh yeah, sure, why not. 5-10 every year, huh? Why not 20? C'mon sparkles, don't be afraid of getting carried away (because you crossed that threshold a long time ago). See, here's the little problem with your theory: in the history of running, not a SINGLE non-african has broken 27:05. That includes South America, North America, Europe, Asia, Australia/Oceania, etc......EV-E-RY-WHERE. And this includes drug users, one in a million talents, incredibly driven athletes, poor athletes with lots of hunger (there are actually poor white people too), guys being coached by the smartest, best coaches ever, etc. Yet, with all that, all that drive, all those resources, and alllllllllll those people running, not a single person from the whole world outside of east/North africa could break 27:05 in history. Not a one. How many east africans? About 40. FORTY TO ZERO. And you are now telling us with a few environment changes non-africans would start doing it in droves??? Too funny.
Look, produce a single sub 27:00 non-african, or a single sub 10.00 100m white sprinter and maybe we'll talk. Until then, your theories are not impressive sparkles.
( by the way, here's a pic of of the 1/2 & 1/2 Johnson running against some actual white sprinters:
http://www.abc.net.au/reslib/200708/r172198_648864.jpg)