I'm not sure what you mean.
The Russians, Chinese, and East Germans/Czechs/Hungarians have [or had] some of the highest IQs of the species.
Indeed, you could argue that the reason even more people didn't starve under communism was because it was being visited upon some of the most intelligent races on the face of the earth.
When you visit communism upon low IQ peoples, the immediate result is mass famine, starvation, and genocide. Remember this song?
We are the worldThat entire famine relief project was necessitated because the "Derg" regime imposed Marxist-Leninism upon a low-IQ people who were unable to withstand the ideology, hence quickly starved to death.
We are the children
We are the ones who make a brighter day
So let's start giving
There's a choice we're making
We're saving our own lives
It's true we'll make a better day
Just you and me
Frankly, it's quite a testament to the underlying intelligence of the Russian people that any of them were able to emerge from 70+ years of Marxist rule [although what few Russians survive to this day do now seem hell bent on cultural suicide].