Asclepias
Diamond Member
The Census Bureau study on African Immigrants out-graduating American Caucasians, Asians points to income as the main causal factor. Furthermore if you study the extraordinary success rate of Nigerians in college it points to strong cultural and familial influences. Asian Tiger Moms have nothing on the Nigerians! So it isn't about skin color, it's the color of money, your culture and your family that are the biggest determining factors. And of course my favorite statistic is a disadvantaged youth that just decides he or she is going to make it, and does.
Like most things there typically is more than just one factor and then there are always exceptional individuals blessed with good luck or the ability to make their own luck. Anyone that postulates an idiotic one dimensional theory such as low IQ no doubt has a low one themselves.