Marie Cachet is brilliant, as her husband says. She begins with the observation that if contemporary humans share 95% of their DNA with chimpanzees then the 5% that we share with Neanderthals is practically the entirety of what separates us ethnic Europeans from apes. Whereas Blacks, the original homo sapiens, share nothing with Neanderthals. Then she goes on to hypothesize that we are what happened to the Neanderthals. We didn't kill them off. What happened was the more extreme Neanderthal phenotypes died at birth, along with their mothers, because the small hips inherited from breeding with homo sapiens wouldn't pass the large skull of Neanderthal man.