I'm hopeful that more of the Stupids will die off before they reproduce. That will definitely elevate the world's IQ average.

Since agriculture came along and gave us abundant free food without having to hunt for it. The most stupid have taken the opportunity to breed as fast as they could, and the human brain which had been growing up until then has been shrinking ever since, the last five/ten thousand year or so, because thinking tends to bring reserve with it, making planned families the norm with thinkers, and brains are expensive organs requiring high grade hunter gatherer type food. The evolutionary 'effect', since I do not know if it is an advantage, is to shrink the brain.

The problem with evolution by natural selection is, that it has no foresight, and only reacts to the current economic and environmental situation. That one day there may come a crisis which we may need our once large brains to survive, is quite beyond it.

There is a story, which may not be fully objective science. That every few tens of thousands of years for the last few millions, nature produces a generation of saber toothed predators. ( There have been, cats, wolves, bears, and even sheep at least.) And nature gives them ever longer and bigger teeth to feed on ever larger animals. The problem though is that every so often the really large prey species, receive a population check, Ice Age, drought whatever, and there is then a crisis for predators, when there is a need for predators to feed efficiently on small prey for a while. The saber tooths never come though it. But then the crisis is over the big animals come back, and evolution says, here is a great food source that animals with very long stabbing teeth could exploit. And the whole thing starts over.

The advantage is that a few sapiens are less stupid than most sapiens and do better during the time they are alive.