That link argues that each individual interbreeding population does have psychological unity, but there are differences between populations.
I see an argument that different populations could have different means for certain quantifiable traits. I don’t see an argument that a single population will be homogeneous.
Moreover, the link claims that populations have diverged on these metrics in fairly short amounts of time. I think that that is evidence for a fair amount of diversity within populations to serve as the raw material for that divergence.
So PUA techniques should work or fail depending on ethnicity. (Yeah! I win the Non-PC Award!) Is that what you believe?
I should clarify that I’m not convinced by the link’s claim that populations differ on those metrics for genetic reasons. But I certainly allow that it’s possible. It’s not ruled out by what we know about biology. I presented the link only as evidence that the case for psychological unity is not a slam-dunk.
I see an argument that different populations could have different means for certain quantifiable traits. I don’t see an argument that a single population will be homogeneous.
Moreover, the link claims that populations have diverged on these metrics in fairly short amounts of time. I think that that is evidence for a fair amount of diversity within populations to serve as the raw material for that divergence.
I should clarify that I’m not convinced by the link’s claim that populations differ on those metrics for genetic reasons. But I certainly allow that it’s possible. It’s not ruled out by what we know about biology. I presented the link only as evidence that the case for psychological unity is not a slam-dunk.