Human-directed Evolution

Humans have gotten to the point where we can direct and control our own evolution.  Eugenics has been one of the earliest ways of directing  our own evolution, but is a great invasion of people's privacy and their bodies, as these programs are usually done against their will.  Advances in genetics have opened up the possibility of genetically engineering developing fetuses for better traits, or curing autism.  However, genetic engineering is a new field with every little knowledge or experience compared to other practical applications of biology.  On top of that, we hardly understand our own genes; millions of sequences' purpose is unknown to us, even after we have decoded our gnome.  However both eugenics and genetic engineering carry grave risks, as we did not fully understand what we are doing.    

In another order of science, robotics and prosthetics have come a long way, to the point where crippled human beings can replace missing limbs and digits with new artificial ones.  However we still cannot create artificial limbs that are as flexible or dexterous as our natural limbs are.  Still they will come a moment where the machine will surpass us in everywhere and robotic augments might only be available to those with money or influence.  

On all of the above mentioned methods to control our own evolution, we have clearly separated us from natural selection, but we might be unleashing the beast within us if we explore our evolutionary potential when we as a race may not be able to control the rapid change.  And like the biological evolution that preceded us, a new race of humans will have to compete with the old race.  And that could be some class warfare that even Marx could foresee.