White means powerful - no negroid genes, because there is no better. Civilization, culture, conquest. They moved efficiently, migrated, passed on genes among other white people living from Iran to Spain. No one at that time had any negroid genes - from Iran to Spain. It is not known whether the negroids, unlike whites, were unable to move, or whether they were too lazy, or perhaps they were preemptively slaughtered as soon as they approached human habitats - probably a great deal of credit for this goes to the white people who made up ancient Egypt. The white Egyptians regularly slaughtered the Nubians from the south, and the road through Sinai for the negroids was the only possible one because they could not build rafts, boats in order to cross the perhaps red.