Greenfield masterfully summarizes our situation again.
He gives anecdotal evidence, but does not state overtly, that the average black IQ is 80. This is a fact that the politically correct are afraid to mention. Disliking a fact does not invalidate it.
Black IQs are distributed along a spectrum from idiot to genius. There are plenty of brilliant black thinkers out there. But having such a preponderance of them who are well below average creates and/or contributes to many problems. Pretending that the IQ issue does not exist, makes it difficult to address those problems.
If we were more open and honest about this, we would be much more able to find solutions. Too many people, politicians especially, avoid mentioning this for fear of offending.