Human evolution is rooted in competitive procreation, not only between individuals but also between groups. These articles stress the evolutionary significance of reproductive competition between disparate breeding populations and races. Articles The Biological Foundation of Culture; Competition and Cooperation in Human Evolution; The Evolutionary Function of Prejudice; The Upper Paleolithic Revolution; Eugenics and the End of Population Growth. Republished in 2000.
There's some weird argument at the end that hereditarianism is somehow opposed by conservatives because Genesis is at odds with [practically meaningless ideas], and this somehow gave license to equalitarians/environmental determinists? Somehow not believing you can turn a beaver into an ant means people aren't like their parents? No conservative believes this. That chapter has a Couple good historical references people might not have seen, though (re: lysenkoism).
There's also some strange chapter about eugenics that doesn't make sense. Oddly enough it sounds an awful lot like Weinstein's weird steady state society idea.
Other than that, there are a couple unremarkable chapters that anyone who knows about this stuff can skip.