This is inherit in the DNA of the race, although you will always have outliers. But the average IQ is 75, borderline retarded with zero impulse control and prone to rage.
What can society do? It is what it is and there is no changing it, ever.
My younger brother is minimally retarded and has an IQ of 79. He will never be able to live on his own, but he can read and write. He’s the resident expert on Star Trek, a show he’s been obsessed with for over 50 yrs. That’s what an IQ in that range looks like.