There’s still a lot of people in denial about IQ and genetics, mostly because it creates a gaping hole in the founding myths created by the civil rights era. Equality and equity don’t exist, we are not all equal, and genetics plays a large role in that. If two Down syndrome people have sex they will likely have a downs baby, if two midgets have sex they will likely have a midget, if two low iq people have sex they will likely have low iq offspring. Modern society despises this concept because at the end of the day it means eugenics is very real. The upside is that by that same reality, high iq people of any race have a greater likelihood of producing intelligent offspring.