Dak
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I don't see much logic to this statement either, if I'm being honest. Why does including educated black scholars justify the inclusion of uneducated whites...? I'm saying you're wrong that Gates and West are unfamiliar with the "actual material nature/science of disparities."
They aren't economists and West in particular has lived an incredibly privileged life. West's perspective from the Ivy tower looks quite different than the working class blacks I have lived around and have talked to.
Klein isn't incorrect to accuse Murray's position as being part of a "racialist" pattern that goes back centuries. He's also not wrong in pointing out that modern scientific interpretations of statistical variation re. intelligence differ widely, and the majority of geneticists disagree, or at least have major problems with, Murray's work. In the sciences, "intelligence" isn't a one-dimensional phenomenon, which is how Murray treats it. He also reduces its correlation to real-world application so that "intelligence = success," but this also isn't necessarily true.
The biggest problem with Murray and Herrnstein's book isn't its scientific findings, which aren't all that controversial; it's that the book serves not only as a scientific investigation, but as a blanket apology for the disparate treatment of racial difference despite high performance. For example, Murray and Herrnstein associate intelligence with wage earnings but fail to note that in scenarios where a black worker and white worker perform the same job and exhibit comparable intelligence, the black worker more often makes less. Their book is an effort to sweep racism under the rug by declaring the modern marketplace a meritocracy, and that's simply not the case.
It wouldn't be so bad if they just stuck with the data and suggested that there appears to be some link between intelligence and heritability, but that's not what The Bell Curve does, and it's not the extent of Murray's position.
I would need to see where Murray supports differential treatment by race despite high performance. All of his positions that Vox writers et al take issue with is differential treatment due to differences in performance. Murray's two main policy thrusts are reducing welfare spending and reducing immigration from Central and South America and Africa down to only high performing persons. The irony of the irrational hate on Murray by Vox (https://www.vox.com/2018/4/10/17182692/bell-curve-charles-murray-policy-wrong), for example, is that they demonize him supporting the UBI (which Vox is typically pro) in lieu of all other welfare programs, because he supports it if it would cut overall Federal spending, and mean that single people have less aid than married (or at least cohabiting) persons. Perhaps even more interesting is that Yglesias is outraged with Murray when he provides a hypothetical bum (waste money, not working, poor health behaviors) as an example as someone who will lack excuses with a UBI, which Yglesias characterizes as "being meaner to someone in need." Yeah, in need why? This apparently is irrelevant to Yglesias. These issues can be connected to discussions about intelligence, but also can be had completely separately, and Yglesias fails to adequately connect them. Probably because Yglesias sees his own position as common sense (and refers to it as such indirectly).
Like you said, there's no certain intelligence = success relationship (eg 100% causation), and there's something to be said about culture, incentives, traits, etc. I'll skip over the athletics thing since you and HBB sort of resolved that. I want to address the discussion specifically about the failure of blacks to "raise themselves up" in comparison with other minorities. Not that this is something you haven't heard, but part of the argument against the welfare state, which Murray hits on a little, but which Sowell et al hit on a lot is that it is the welfare state along with all its rhetoric of victimhood (and then the drug war) which has arrested the economic (and intellectual) rise of blacks for a variety of reasons. Murray very clumsily points out welfare disproportionately subsidizes reproduction of low IQ women (which also irritates Yglesias), but this is in fact an incentive and cultural issue. Yglesias chooses to focus on "but what about the kid?" rather than considering the bigger picture, which is what Murray (or Sowell) is/have been doing.
Yglesias also makes the common error of justifying government spending by pointing out "hey look at this limited improved outcome", without considering opportunity cost and incentives. In other words, the Broken Window Fallacy and not seeing how subsidizing poor behaviors just multiplies the poor behaviors (so you improve some limited outcome for the original 10 people but A. Didn't fix all the problems and B. Now you have 20 more people to deal with). This is how Fannie/Freddie can lend money to tons of minorities for housing yet the black home ownership rate won't budge. This is how the Fed and State governments can spend trillions of dollars and not meaningfully budge the overall poverty rate. How healthcare coverage and quality continues to expand but lifestyle disease rates continue to rise. We can't spend a problem away (or if we can, the money is pulled away from something else), and the expense incentives a variety of responses which are typically unconsidered by the Ivy tower types. Sometimes you have to let people touch the proverbial burner for learning to occur, but this violates the overfocus on "care/harm" which Haidt has identified in US liberals and which Yglesias and Klein demonstrate to a great degree.