W. E. B. DuBois' family crisis.
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D001741:Black or African American / Q000145:classification / Q000208:ethnology / Q000235:genetics / Q000266:history / Q000523:psychology / Q000706:statistics & numerical data; D005053:Eugenics / Q000266:history / Q000379:methods / Q000639:trends; D049673:History, 20th Century; D006801:Humans; D014481:United States / Q000208:ethnology