Nazi Germany and imperial Japan as other nations had the ideology of the "pure race." Nazi Germany with the Aryan white race and imperial Japan with pure (Asian) yellow, both as an example, dealt with the idea that a race was pure without miscegenation.
I would like to know if there is any real or fictional ideology that determines that "the true race" is only achieved through the misigena- tion of the three races (Asian, white and black) or the union of two races