There's no evidence this applies to human subspecies, and r/k isn't even used in modern biology because it's reductive and simplistic (I mean Jesus, just look at the image). Blacks aren't territorial now? Since when? And having lots of kids is not really related to human subspecies as much as it is to economic conditions. In the West, religious fundamentalism is far more associated with brood size than race is. In less-developed societies, everyone has shitloads of kids. This just doesn't add up.