It didn't take 30 years of research to tell us what we already knew: blacks are less intelligent than whites. Not racist, it's just a fact. Go look at a masters or ph.d. level university course's occupants in engineering, statistics, finance, biology, etc. and you will find no blacks in there. I'm sorry but their brains just arent capable of comprehending that kind of knowledge. Of course there are anomalies, but in 98% of the cases the aforementioned statement is true.