Interesting. Another thing that popped through my mind along with a bit of wild extrapolation. I have one (and only one) kid and my wife chose to give birth by

Interesting. Another thing that popped through my mind along with a bit of wild extrapolation. I have one (and only one) kid and my wife chose to give birth by C-section. Apparently it's fairly low risk to have two kids delivered this way, though we probably won't have another one. But ... another issue with human species was the problem of "big brains", with an upper limit of cranial size at birth and the (unique to humans, I think) problem of labor pain. C-sections solve this problem and allow for selection of even larger brains inside bigger heads. So now the SciFi what if ... what if selection goes so far that at some point we lose the capacity to give birth naturally? Sure, average IQ could be 200 but we're entirely dependent on technology to reproduce. And if some global catastrophe prevents that technology to work, we're out of the scene as a species in the blink of an eye.