 There are three versions of racial population naturalism: cladistic race; socially isolated race; and genetically clustered race. Cladistic races are “ancestor-descendant sequences of breeding populations that share a common origin” (Andreasen 2004, 425). They emerged during human evolution, as different groups of humans became geographically isolated from each other, and may be dying out, if they have not already, due to more recent human reproductive intermingling (Andreasen 1998, 214–216; Cf. Andreasen 2000, S653–S666). Socially isolated race refers to the fact that legal sanctions against miscegenation might have created a genetically isolated African American race in the USA (Kitcher 1999). Finally, defenders of genetically clustered race argue that although only 7% of the differences between any two individuals regarding any one specific gene can be attributed to their membership in one of the commonly recognized racial categories, the aggregation of several genes is statistically related to a small number of racial categories associated with major geographic regions and phenotypes (Sesardic 2010; Kitcher 2007, 304).