Maybe wrong there. The first family may have been black. There is a theory that the mark on Cain was that he was bereft of pigmentation, white or albino. Egypt (Africa) is said to be the cradle of civilization and Mitochondrial Eve is said to have originated in East Africa. It is curious to note that in African cultures, albinos are considered bad luck or cursed and feared.
That is backwards.
First of all, that "origin in Africa" crap comes from Evolutionists. We came from the Garden of Eden, the location of which is unknown. And before the Flood, there was just one large continent, so the exact location could be anywhere.
As for the Africans you speak of, maybe they think albino is bad luck "because different" but that's about it.
So God put whiteness as a curse upon the wicked man, and now everywhere that race goes, there is order, progress, empire, and advancement...? Doesn't make sense to me.
Japeth means "expanding" which seems to fit the reality of the white race from ancient times to the present day. There's something eternally restless and inventive about whites. They always have to explore new frontiers and constantly ask, "Is there a way we can improve this even more?" Even though Asians have the same or even slightly higher IQ, they don't have the same knack for invention or change. Look at any Asian culture: they are fundamentally conservative, staying the same from century to century. Even advanced countries like Japan, China, and Korea only copy and mass-produce things efficiently -- they never invent anything.
The white race also seems to have "expanding" knowledge, civilization, culture, accepting and then spreading the Catholic Faith, and of course "expanding" their empire and influence over a disproportionate amount of the world (Roman Empire, Austro-Hungarian Empire, British Empire, American Empire)