More to do with altitude and hard work than talent, genes or tribe.Rudisha, obiri, the cheps and the kips including on the Ugandan side all train in eldoret or around Mt Elgon.Wachiuri, karoki, wanjiru, ngugi, nyairera, kabuu, ndereba all train/ed in nyahururu or around Mt Kenya. There's also a bunch that train in ngong hills here in Nairobi.