The point of Charles Murray's Facing Reality is quite simple. Whatever you fervently believe with every cell in your activist brain, liberals, human groups are different.
(The bigger meaning of Facing Reality)
That means that if you use government or secular religion to force group outcomes to be "representative" of society as a whole you are going to have to use force. A lot of force.
And even when you use force, it will probably not make much difference.
Charles Murray has spent his life showing liberals how their fervent beliefs are in fact virtue-signalling fantasies -- from way back before "virtue-signalling" became a thing. Let's recapitulate.
In Losing Ground: American Social Policy 1950-1980, 323 pages, published in 1984, Murray wrote that the Great Society was a wrong turn and failed, and that liberals should know it because they instrumented all the wonderful new programs so they could boast about their successes, so the numbers are all there for anyone that cares. But the liberals didn't want to write about the failures. So they didn't.
In The Bell Curve: Intelligence and Class Structure in American Life, 845 pages, published in 1994 and co-written with Richard Herrnstein, Murray argued that the future would belong to those with more "cognitive ability." I.e., black Americans would not do well in the job market of the future. Liberals said that Murray was a racist.
In Coming Apart: The State of White America, 1960-2010, 407 pages, published in 2012, Murray wrote that, considering only white Americans, the cognitively able were doing fine with great careers and merger marriages (of cognitive able men to cognitively able women), the middle 50 percent were doing so-so, and at the bottom the cognitively disabled men didn't work much and the women didn't marry much.
Now in Facing Reality: Two Truths About Race in America, 151 pages, published in 2021, Murray says told-ya so liberals. Groups that test with lower IQ have worse outcomes in life and work and crime. Period, full stop, science.
For me Facing Reality crystallized two notions that hadn't previously crystallized in my brain.
First, I have known for a while that humans do not give up their fervent beliefs when presented with "science" that demonstrates their ideas are wrong. Not at all. Instead humans go for one more Big Push, a Reign of Terror, a Great Purge, a Great Proletarian Cultural Revolution. Only when their brilliant ideas lie around them in graveyards from here to the horizon do people give up on their glorious vision of a better world. So this is it. This is our Great Purge. That is the meaning of "systemic racism" and Wokism and pushing Critical Race Theory into the nation's schools. Liberals instinctively know their ideas have failed. So the response is to destroy their political opponents. Humans always do things like that when things start going wrong.
Second, "woke" corporations are a natural and physical response by corporations to the double-bind the Civil Rights era puts on them. The original Civil Rights Act in Title VII provided for affirmative action and the idea that the only way to show an absence of bias was by showing that a corporation's workforce "looked like America" from janitor to CEO. Thus, if a traditionally marginalized group is "underrepresented" at any level in a corporation then the corporation is just sitting there, like a rabbit before a coyote, easy prey for any lefty activist group hungry for a nice tasty lunch today. But, because of the distribution of cognitive ability in different groups it is physically impossible to achieve this. So all a corporation can do is salute and contribute to BLM and close the accounts of Republican candidates at their bank.
So, if gubmint programs can't achieve what they promise to do, because reality, what is the point of them? The point is that every government program is a war on some horrid monster, and the noble supporters can expect loot and plunder from here to eternity.
Thus, all politics is about ginning up a war on some frightful enemy and then sharing the loot out among the supporters. There are four ways to do this.
You can declare some small neighboring country an enemy and invade and conquer them, as Bismarck did to Denmark (!) in 1862. This is the best strategy, because it unites the whole country against an insignificant foe that can't really fight back.
You can declare that Japs and Nazis are the enemy and have a world war over it. This is obviously a high risk strategy: what if you lose? But still, you get to unite the whole country to fight the monsters: keep your fingers crossed.
You can declare some large minority to be an enemy and fight a culture war against them, as the left is doing right now against "white supremacists." The danger is that you might ignite a real civil war, as happened in the US culture war of the 1850s. But nobody expects the Spanish Inquisition.
You can declare a small minority to be the cause of all our problems, and unite the rest of the country against them, as Hitler did with the Jews. Not much fun for the small minority. Hey, I wonder if the current liberal use of blacks as a helpless victim small minority might not rebound in a "backlash."
See, I think that the real need for liberals to "face reality" is that there is a good chance that their present way of dividing the nation -- as all politics does -- might work against them. What if whites and Latinos and Asians all decide that low IQ blacks are a problem in the workforce, and a menace on the streets? You can say that the group differences between blacks and the rest mean that blacks are helpless victims. Or you can decide that since blacks commit about 50 percent of all murders that blacks are an existential problem.
Suppose we experience the US politics of the last 50 years as a continuous effort of liberals to insist that blacks are "helpless victims" and to cancel anyone that disagrees, because raciss.
In the end life, the universe, and everything is a throw of the dice. That's what modern "science" says.