On complaints that tests are biased against minorities:
We know exactly what happens when minorities are told tests are biased against them: they do worse on those tests. This is the essence of the idea of “stereotype threat” – for example, one can improve women’s performance on a math test simply by telling them that the test is not biased against women. So maybe we should stop doing exactly the thing that we just proved hurts women and minorities’ educational performance.On educating children away from drugs:
nearly every study on DARE programs has found that they increase drug use, sometimes as much as 30%.On "sensitivity training":
A comprehensive review of 31 years of data from 830 mid-size to large U.S. workplaces found that the kind of diversity training exercises offered at most firms were followed by a 7.5 percent drop in the number of women in management. The number of black, female managers fell by 10 percent, and the number of black men in top positions fell by 12 percent. Similar effects were seen for Latinos and Asians.Besides, just talking to people about diversity makes them more likely to think in terms of racial and ethnic categories.
Plus, calling people racists makes them more racist. In fact all attempts to change people's attitudes run afoul of things called the "boomerang effect" and the "backfire effect." Basically, people hate to be criticized, and the main thing that happens when you criticize them is that they get defensive and find ways to justify their beliefs and actions.
It should of course be said that this is all social psychology, so none of these findings need be taken very seriously. There are studies that purport to show the opposite. On balance, though, the findings that show these reverse effects are stronger and better attested than anything showing that these measures help. There is simply no evidence that complaining about rape culture reduces rape, or that fulminating against racism decreases racism.
On the other hand there has been a measurable decline in both sexism and racism over the past 70 years, so these things can change. Maybe measures that fail in the short term have some effect on a time scale of generations. Or maybe the changes are being driven by forces that have little to do with moralist hectoring.