The so-called races that humans have been grouped into are cultural
constructs and can not be reliably used to distinguish different
ethnographic and/or cultural groups and definitely cannot be used to
separate people into distinct biological groups. Variations in melanin
is notoriously variable throughout the world - not specific people of
African descent. Anyone that believes racial groupings are valid is a
racist. Sam Clemens was a racist, but as he got older the differences
in the so-called racial distinctions became less important to him -
except perhaps for a possible sense of guilt. He most definitely
maintained that Native Americans were an inferior peoples.
Adventures of Huckleberry Finn remains my favorite all-time book.
/Unaffiliated Geographer and Twain aficionado/