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Originally Posted by schu_22
In the past, intelligence was a trait that actually helped you to survive which is the reason it evolved. But in today's society, you don't have to be intelligent to survive and reproduce, and coupled with the fact that the dumber individuals seem to have a greater reproductive fitness (they're winning!) i can see the average intelligence of the human race decreasing over the centuries. At least until we come up with an effective and accessible way to genetically supplement our offspring which would artificially give human intelligence a boost.
I don't really buy this. I mean, yes, it's true, but it's also true that probably most people who've survived for this long have the natural intelligence to survive in primitive society. I also think that while intelligence is selected for, so is physical strength, etc., and certainly that's not being selected for in the same way.
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Related, the female pelvic opening size was ldo highly selected for due to the fact that if they baby's head couldn't fit through there, you and your baby died. Now we have C-sections so that selective pressure is effectively removed and women's hips will be getting smaller over the centuries, and a "regular" birth will be almost unheard of in the future. (I think this is basically the case in some breeds of dogs too but im not sure.) Just a theory slash random musings that I just had
AFAIK, breeds of dogs are heavily inbred and these are the kinds of things that happen when you do that. Humanity is the opposite.