The Archregimancy wrote:Grave_n_idle wrote:Within your 'race', there is more genetic diversity - and probably even range of phenotypical expression - than between your 'race' and another 'race'.
I agree with your general point about genetic diversity being largely irrelevant to the social construct of race, but the specific quote above is not inherently and necessarily true.
It would be more accurate to state that human genetic diversity is not tied to race, but rather to distance of a human population from Africa; as a result of bottlenecks within human migration patterns there's greater human genetic diversity within subsaharan Africa than there is within all of the rest of the human population on the planet.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1978547/
Latter link compares genetic variability with cranial phenotype variation.
Well, realistically what they were actually studying was geography, not 'race' - and arguably the difference between midpoints within populations, "Total within-population phenotypic variability was computed as the mean standardised phenotypic variance over all traits".
I'm not denying that there can be clear geographic trends in populations, or that some geographic or otherwise epigenetic trends may exist. That's about geography, climate, etc - and it's a useful tool for tracking migration, and for calculating a possible single origin point.
What it doesn't really address is 'race' - which isn't intrinsically and inherently the same as geography and epigenetic markers. Indeed, that's kind of the point I've been making.






