He did the study to the best of his ability and the conclusions were not tainted by PC politics at the time.
Proof the problem is political correctness and not his study. If his study/investigation found other results he would have published that instead.
At some point he will be remembered as the brave pioneer he was/is even if the results weren’t popular.
As Jack Nicholson said in the movie “A Few Good Men” ironically directed by Rob Reiner; “You Can’t Handle The Truth!”. You just can’t make this stuff up.
Shockley said the same thing. It’s politicl correctness that makes it impossible to discuss whether the results are correct. His statement that “anyone with black employees knows” is tellIng.
This is why I, with a background in science, distrust peer review profoundly.