You have probably heard or read that most genetic variation is within races, not between races. This assertion has led, in my opinion, to unwarranted inferences. Often bracketed under “Lewontin’s Fallacy”, the basic intuition is that if most variation is within races, then races as a taxonomic unit are without utility or substantive basis.
These discussions are ultimately predicated upon a statistic, FST, which is more complicated than you might expect.
Read the full article here: Buddy, can you spare a genetic distance statistic?
