I've previously cited research showing that the emotion of empathy is inspired unconsciously by genetic similarity. I have also speculated that this subconsciously felt empathy or lack of it is a major factor influencing a wide range of behaviours, ranging from voting patterns to the commission of crime. In relation to crimes such as homicide or gang rape, the hypothesis would be that the subconsciously felt empathy based on genetic affinity would act as a barrier, inhibiting criminal acts.
The Independent today published an article about a Homicide Map that has been made available online by Brazilian researchers. It shows the incidence of homicide across the world. I thought it would be interesting to compare this to an ethnic diversity map, if I could find one. Surprise, surprise: the two maps look virtually identical.
Ethnic diversity map: