It is interesting that modern populations that have more of a Neanderthal contribution are more advanced in terms of mathematical scores, especially in light of their former status as the idiots of the human family tree. This lecturer does not blurt such rude observations, but does impart the information necessary to make rude observations for those of us inclined to do so.
Like all academics of our era, he veers away from violence, aggression and warfare in favor of some form of unspecified benign selection process. Of course, if he does not, he could lose his job. The possibility that humans out of Africa wiped out a larger-brained branch of our psychotic family tree does not fit with the current orthodoxy, which places Caucasian Europeans as the only genocidal aggressors on Daycare Earth. Despite the professor’s setting aside of human nature, his command of the sources is broad, deep and well presented.