> the Cro-Magnon [ie. current "humans", we] will in its turn fall victim to the next human species.
I don't think so, at least not in a violent way. Like something Nietzsche said in TSZ, "man is something to be surpassed, but only a buffoon thinks that man can be overleapt."
Well, it is really hard to imagine how something/somebody can surpass Cro-Magnon in the ways of violence. On the other side, only violence can keep the Cro-Magnon at bay as Cro-Magnon willn't allow to be peacefully surpassed.
>"but only a buffoon thinks that man can be overleapt"
yep, the 20th century history is littered with such failed over-leap attempts. Curious time we live at - the previous attepts of "leap"-type [necessarily forced] transformations of humans and society are finished and no new is initiated yet. Is it quiet before the storm? I don't believe that we learned the lesson.
I don't think so, at least not in a violent way. Like something Nietzsche said in TSZ, "man is something to be surpassed, but only a buffoon thinks that man can be overleapt."