Whenever anyone brings up the topic of racial differences, someone screams “Hitler!” and then someone else screams “Eugenics!” and then all rational thought stops.
It’s kinda sad. But that’s all I’m going to say on that.
(…except to mention that I live in Japan (which, in case anyone didn’t realize, is just chock-full of Asians) and on my refrigerator is a photo of my best friend’s kids, who happen to be black. I think that calling someone a racist - without knowing that person at all - because you either don’t like or can’t understand their arguments is pretty pathetic.)
Anyway. Back to the subject at hand. Yes, we do definitely have to take into account the length of time per generation. No question there. But the central point of The Beak of the Finch is that it doesn’t take many generations to see a widespread change - under the right conditions.
In that book, the author used the Galapagos finches to show that with El Nino weather patterns, which drastically increase competition for survival, and increase it in some very measureable ways, finches changed from generation to generation. So that, for example, the average beak length might be half an inch to begin with, but after the weather pattern shifts it might go up to 3/4 of an inch or even longer. (I’m not going to get into why here.)
Given that this is a 50% change over one or two generations, it seems very likely to me that there would be similar changes observed over the minimum of six or eight generations since slavery was ended in America. (And remember, some families were taken to North America far earlier, like back in the late 1500s.) So the Darwinian idea that evolutionary change takes millenia to accomplish has been more or less proven obsolete.
And also, I totally agree with the “sub-set” of homo sapiens thing. Hell, if we’re going to call a Grant’s zebra a different species from a Thompson’s zebra on the basis of fucking stripe patterns, then I don’t think it’s a too much of a stretch to say that Blacks, Whites and Asians are different species as well.
But then, one must respect the political considerations at stake, mustn’t one?