bc575c07_si_s_Soap_Box____February_2013__Race
[0] Genealogy: [Ethnicity] Ethnicity is defined in terms of shared genealogy, whether actual or presumed. Typically, if people believe they descend from a particular group, and they want to be associated with that group, then they are in fact members of that group. [Race] 
Racial categories result from a shared genealogy due to geographical isolation. In the modern world this isolation has been broken down and racial groups have mixed.
~ Susi's Soap Box ~: February 2013
Race