"Looks like the "Bell Curve" revisited."
Read and believed it when it was published. Still do, for the most part.
How is it that physical differences occur so often, resulting in differing capabilities, yet many deny mental capability ranges?
Outrage and unhappiness over these findings is also typical.
I once gave a talk to an upper class group of people who were almost uniformly rich and liberal. The idea was to earn my free dinner. I talked about how important intelligence was in predicting future academic and monetary success. They were furious and almost shouted me out of the place--especially when I pointed out they routinely bred their dogs and horses according to good genetic principles.
Egalitarianism lives on and buttresses the whole liberal intelligentsia in their efforts to maintain power.