This is an interesting train that was derailed into the boring track of race.
I'd be more interested in what the long-term genetic effects of matching up fairly similar people across larger and larger divides (distance, social circles, habits, professions, etc.) might be.
Is there evidence that we're gravitating towards "fairly similar people"? The article points to evidence that online dating is increasing the diversity of couples.
No, there's the opposite. People seek out with an immune system as different as possible from their own. How? They smell differently. (Pheromones etc.).
At least that's what I remember from ten years ago or so. Not sure if the science held up.
I'd be more interested in what the long-term genetic effects of matching up fairly similar people across larger and larger divides (distance, social circles, habits, professions, etc.) might be.