Without a randomized experiment on babies of different races born to surrogates, it is difficult to say that observed differences in intelligence between races is due to genetics or to prenatal and postnatal environment. 50 years ago, it was assumed that Chinese and Indians were stupid according to the correlational data available at the time, and Chinese Americans whose ancestors arrived in the US in the 19th century still perform poorly in tests of general intelligence, but it is now abundantly clear that this isn't due to a genetic racial disadvantage.
The left would say that environment can and should be fixed.
The left would say that environment can and should be fixed.