Genes can be adapted by environmental factors over time. Thats why we all look different, because our bodies have learn't to change themselves in order to survive against natural conditions e.g weather, sunlight and the thickness off our skin etc.
If this can physically occur then why not Intellectually?
If many Blacks in Africa etc have not been given the broad spectrum of education that white westerners had in the past then they have adapted to this level of understanding and this may reoccur throughout generations.
The term race refers to the concept of dividing people into populations or groups on the basis of various sets of characteristics and beliefs about common ancestry.[1] The most widely used human racial categories are based on visible traits (especially skin color, facial features and hair texture), and self-identification.[2]
Conceptions of race, as well as specific ways of grouping races, vary by culture and over time, and are often controversial for scientific as well as social and political reasons. The controversy ultimately revolves around whether or not races are natural types or socially constructed, and the degree to which observed differences in ability and achievement, categorized on the basis of race, are a product of inherited (i.e. genetic) traits or environmental, social and cultural factors.
http://en.wikipedia.org/wiki/Race_and_geneticshttp://en.wikipedia.org/wiki/Race_and_Intelligencehttp://en.wikipedia.org/wiki/Race_and_crimeA February 1997 report on rape and sexual-based crime published by the United States Department of Justice stated that of the crimes surveyed, 56% of arrestees were "White", 42% were "Black", and 2% were of other races. The report additionally noted that "[v]ictims of rape were about evenly divided between whites and blacks; in about 88% of forcible rapes, the victim and offender were of the same race."[4]
A subsequent United States Department of Justice report which surveyed homicide statistics between 1974 and 2004 stated that of the crimes surveyed, 52.1% of the offenders were Black, 45.9% were White, and 2% were Other Races. Of the victims in those same crimes, 51% were White, 46.9% were Black, and 2.1% were Other Races. The report further noted that, "most murders are intraracial", with 86% of White murders committed by Whites, and 94% of Black murders committed by Blacks.[5] It should be noted that the document does not provide any details concerning what races or ethnicities are included in the designations "White", "Black", or "Other Races".
70% of prisoners in the United States are non-Whites.[6] In 1998, nearly one out of three Black men between the ages of 20-29 were in prison or jail, on probation or parole on any given day.[7][8]
A 2005 United States Department of Justice report on violent crimes stated that of the "perceived race" of the offenders in single-offender violent crimes, 43.3% were White, 21.0% were Black, and 9.6% were "Other", with the remaining 26.0% of offenders of unknown race.[9]
Note that there are more whites in the United States than blacks, also many of these "whites" are actually of hispanic background. US Census allows one to identify as white from spanish speaking countries.
46.9 percent were black, the population of blacks in this country is only 12.12% . That means on a broader scale, blacks are more likely to be violent offenders than whites are.
On a side note, Ashkenazi Jews scored highest for IQ
http://en.wikipedia.org/wiki/Ashkenazi_intelligence