I seem to vaguely recall a novel in which a world government had declared that in order to promote hybrid vigor and resistance to disease, same-race marriages and matings should be considered equivalent to incest. People who were not already mixed-race were permitted to marry or have children only with a partner of a different racial background.
The slightly-secret reason for this was to prevent future outbreaks of racial violence by blending the races. Although everyone in the story’s present day was opposed to racism, it might come back in the future. (I’m guessing the novel was written in the ’60s or ’70s.)
And the real reason for it was to reduce population, since most people were still System-1 racist even though they were System-2 anti-racist. Making the only socially acceptable partners be ones of other races meant that people were overall less likely to find partners and have children.
I seem to vaguely recall a novel in which a world government had declared that in order to promote hybrid vigor and resistance to disease, same-race marriages and matings should be considered equivalent to incest. People who were not already mixed-race were permitted to marry or have children only with a partner of a different racial background.
The slightly-secret reason for this was to prevent future outbreaks of racial violence by blending the races. Although everyone in the story’s present day was opposed to racism, it might come back in the future. (I’m guessing the novel was written in the ’60s or ’70s.)
And the real reason for it was to reduce population, since most people were still System-1 racist even though they were System-2 anti-racist. Making the only socially acceptable partners be ones of other races meant that people were overall less likely to find partners and have children.