We haven't gotten smarter.
Ja, sakte. Det har egentlig gjort det lenge, men Flynn-effekten har maskert det. Nå har Flynn-effekten stoppet opp og vi ser nedgangen: https://www.amazon.com/At-Our-Wits-End-Intelligent/dp/184540985X
I don't know how much longer AI researchers are going to try to milk "deep learning" before they realize it isn't the answer to AGI. For once, they might actually have to "come up" with a completely new approach. Unheard of as that has been for decades. One of the late John McCarthy's dreams was that the "simplest computer" would play world-class chess using "clever methods". He never lived to see it and neither will we. Perhaps we are indeed becoming less intelligent as time goes on.
The fact that arguably the greatest scientific human achievement to date was half a century ago back in 1969 (i.e. putting a man on the moon and bringing him back alive and well) and furthermore achieved with less computing power than a single smartphone today kind of supports the idea that we are, as a species, indeed becoming less intelligent. The handful of geniuses that may still linger or lurk among us are likely in environments less suitable for them to really excel.
It's true even adjusted for other variables. Just listen to this playlist with IQ experts. It's an uncomfortable truth but it doesn't make it less true. Asians have a higher average IQ than whites, by the way (but whites aren't complaining). Some Asians are, though. Having said that, one of the central arguments of this scholar's book is that humans are actually becoming less intelligent, on average, because "poor" people are now outbreeding the wealthy and also having far fewer of their children die in infancy and childhood as they often did historically. The author also states that intelligence is 80% genetic or heritable.