From Steve Novella at Neurologica:
The scientific question of whether or not race exists is, in my opinion, not completely objectively answerable. It depends. Is Pluto a planet or dwarf planet? Astronomers can reasonably disagree about where to draw the line. More.
If only people would just shut up after that, a lot of social problems would dissipate.
I have never heard a good argument for the view that there has ever been more than one human race. I’ve seen plenty of damage done by the opposite view.
See also: What we know about human evolution.
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