Intelligence is proportion to brain size. african americans have smaller brains than whites. they also have lower IQs. IQ tests are debatable, but it's still evidence.
To be fair, whites are not as smart as most asians. Based on tests and brain size. whites are known to have a wider rage of intelligence, but overall be less intelligent. hence, more genius whites, and more retarded whites.
Given evolution occurs, i'd be more surprised if the differing races had the same intelligence, than if they had a difference. it's PC culture that says otherwise.... the same people would be saying all hominds were same intelligence, when it is a fact there were hominds that were smarter than homo sapiens.
"General consensus among scientists as published in the Wall Street Journal in 1994 titled "Mainstream Science on Intelligence" shows a consensus among scientists that average IQ are as followed in America. Blacks 85. Whites 100. East Asians 106. Further studies done and published in science journals show IQ to be overwhelmingly genetic. Minnesota Twins Study by Dr. Thomas Bouchard, the most famous twin study done, shows that identical twins separated at birth are significantly more similiar in IQ than fraternal twins raised together with a genetic correlation of .80.
Cranial size studies show published in the science journal Intelligence 1997, 25, pg 15 shows the average cranial size as followed. Blacks 1,267 cm3. Whites 1347 cm3. East Asians 1364 cm3. The link between cranial size and intelligence are strongly established in several scientific studies published in journals. "Brain Size and Cognitive Ability" in the 1996 issue of the journal Psychonomic Bulletin and Review surveyed all the published research on this topic. It included studies that used the state-of-the-art technique known as Magnetic Resonance Imaging (MRI) which gives a very good image of the human brain. There were eight of these studies with a total sample size of 381 adults. The overall correlation between IQ and brain size measured by MRI is 0.44.
So why are Asians smarter? More specifically Northeast Asians? The scientific theories among scientists today hold the notion that the humans that left Africa 110,000 years ago into colder climates of Europe and Northern Asia required more thought and planning to obtain food than that of Africa. And that Northern Asia had more drastic temperatures than that of Europe. It's evolution at work.
The Bell Curve (1994) stated that the average IQ African Americans was 85; Latino 89; White 103; Asian 106; and Jews 113. Asians score relatively higher on visuospatial than on verbal subtests. The few Amerindian populations that have been systematically..."
Nathan JR