The easiest way to think of r/K selection strategy for those who may not know about is that "r" can be thought of as the strategy that "hard r's" take in having and "raising" children while K can be thought of as the strategy that Whites and some Asians use is having and raising children.

The "r's" pump out as many as possible without putting much time or resources into their offspring and hope that some of them survive to reproduce again. It's basically just a "numbers game" with them.

The "K's" have a few offspring and devote more time and resources into raising them so that they will turn out better and have a better chance of surviving and reproducing.

I kinda wondered if he was still on YouTube since he is kinda affiliated with our side of culture/politics.