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Sure, in America there are at least three independent lines of evidence for the 10x figures. DOJ arrest rates, DOJ violent crime victim surveys, and simply by looking at the race of murder victims (50% are black -- most murder in the US seems to be intraracial). Globally, you can look here: http://www.guardian.co.uk/news/datablog/2009/oct/13/homicide... The numbers in Africa look bad, but South Africa is really the only place in Africa together enough to do statistics on this stuff. Of course, they also have the highest murder rate in the world (one assumes that other parts would have them beat handily if they could count it all). Jamaica also tops the list in our Hemisphere. The rate cited there for Haiti is half as high as I've seen it elsewhere, but Haiti isn't a great place for accurate data collection, of course. I've got some estimates for crime rates of African populations in places where they are severe minorities (there's a figure on the internet that claim 80% of London gun crime is African/Caribbean), but it's really hard to be very exact about this sort of thing. It's a mess of numbers, but there just doesn't seem to be much room for the case that America's problems are special (Brazil, for example, has somewhat similar population demographics, and broadly similar problems). |
Now, it's also true that in all of these places, people of African descent are poor, and it's also well-observed that poverty is correlated with crime, so I'm not really convinced that your "black people commit more crimes because of a biological tendency to do so" hypothesis is any better than the more conventional "black people are poor for historical and cultural reasons, and poor people commit more crimes" hypothesis.