1) When the U.S. ship sailed into Tokyo Harbor in 1853, Japan was living in the Middle Ages technologically.
2) Early modern inventions flowed, as did the river of human DNA, from settled areas into new frontiers, where human family lines have been re-mixed countless times in just a few thousand years.
3) Advocates for ethnic supremacy may be tolerated so long as they are acting in self-defense. In truth, all human types are performing so far below their genetic potential (in acting intelligently) that genetic superiority is no issue at all, except to point out that my superiority, if I have any, may be
due to my programming by both self and others.