Race, Evolution, and Behavior shows that this racial pattern in crime is found worldwide. Whites in the United States and in European countries are in between. To know the answer, you must look at all of the traits taken together because they form a pattern. No environmental factor can explain all of them taken together. There is, however, a gene based explanation.
Evolutionary biologists call it the r-K scale of reproductive strategies.
At one end of this scale are r-strategies that rely on high reproductive rates. At the other end are K-strategies that rely on high levels of parental care. Highly K-selected men invest time and energy in their children rather than the pursuit of sexual thrills. These race differences in reproductive strategies make sense in terms of human evolution. Modern humans are thought to have evolved in Africa about 200,000 years ago.