Earlier quoted context omitted.
It seems to me that if the local maximum in 1940 was lower than the global minimum in 2140, interesting things would happen, and that's worth wondering about. How to best give people nutrition, love, security and education and everything they need to develop to their full potential are all tractable problems. How to manipulate human brains to enhance performance is something we learn more about every day. A guy in au…
I doubt the global minimum is going to change too much in the short term. There are people with philosophical objections against say genetic treatment for diseases, and I think certain developmental disabilities will remain with us for a long time. (Plus, oftentimes people who are immensely smart in one respect are lacking in others, so perhaps there will always be room for, say, math savants who can do little else.)
The world has changed that drastically that fast before. It only takes one generation.
Figure out how to really educate kids to a maximal degree. Post-religion anti-indoctrination memetic inoculation. Get everyone on the planet food. No anxiety around sex. Pain medication for anyone who needed it. Smarter technology. Less people living lives of quiet desperation. If all that stuff happens, people could get smart fast.
I think another shift the scale of widespread literacy is possible, and it might push the average center of gravity above the geniuses of the 20th century. Not the minimum. Oops.