The inevitable disparities between individual cases are often enhanced by social factors, like race, which plays a role that is not always well understood. The commission authorized a study that showed that in Illinois, you are more likely to receive the death penalty if you are whitetwo and a half times as likely. One possible reason is that in a racially divided society whites tend to associate with, and thus to murder, other whites. And choosing a white victim makes a murderer three and a half times as likely to be punished by a death sentence as if he'd killed someone who was black. (At least in Illinois, blacks and whites who murdered whites were given a death sentence at essentially the same rate, which has not always been true in other places.)