Well I didn't take the time to read all the comments but seeing as where this was going I'll just say, the "stupid" people in our society today are the ones really reproducing, hence why we have so many "stupid" people in comparison to the smarter people; mainly because we have jobs, careers, responsibilities. We (I) really don't want kids in the near future, and when we do it's generally one to two kids at the most.
So all and all, there will always be way more stupid people than smart people, smart people use condoms.
FYI, it's just fantasy that we want robots to enslave us, as UFOs to do the same. This would not happen, either they would not even waste their time with genocide or bother to come to this rock. If any species can do FTL or manage to get to our planet, we are nothing to them, they could eradicate us in a blink of an eye.