Global IQ growth rates have been slowing down in recent decades.

Global IQ growth is down all the way to 1.8 per decade in the 1986-2020 period.

BRICS nations showed the greatest gains in IQ over time in recent decades, at 2.9 IQ points per decade.

Developed nation states are still growing at an average of 2 IQ points per decade.

The poorest nation states are showing the slowest gains in IQ, even slower than developed economies.

The poorest nation states are getting ever further left behind. It might actually be impossible to recover them if the current trends continue. Sub Saharan Africa might actually be unsalvageable.

Global economic growth rate, global population growth, global IQ gains, and global innovation are all slowing down decade on decade. Humanity is moving towards a peak beyond which it cannot grow. The poorest nation states are getting ever further left behind.

The East Asians are currently the smartest people on the planet. Their demographics are collapsing however. The only way ahead might be to mix the genetics of East Asians with the Americans to create the next level of superior humans.

Assuming a lifespan of 80 years for the average person, globally, your grandkid will be 14.4 IQ points smarter than you, or one deviation smarter than you.

Conclusion:

We can expect the world to become scary smart compared to the present every century.

We can also expect global GDP to keep doubling every century after the Chinese and US economic stagnation event hits.

The world will continue to slow down, there is no way around it.

( Exception possibility - genetic alteration of all newborns in the future )