On this scale, most people in each of the three races will tend to be neither particularly timid nor aggressive. They mostly fall within one standard deviation of the white mean. Figure 3 zooms in on the region of extreme aggressiveness. The areas under the curves beyond 3.2 SD represent the respective probabilities that a random black, white or Asian will be aggressive enough to commit assault. In the right tail, aggressiveness probabilities are small, but they show that compared to whites and Asians, blacks are much more likely to be extremely aggressive.
Criminality refers to a degree of disaffection from society that leads to criminal behavior.
It is a state of mind. No one is satisfied with every detail of the laws that constrain him, whether they be speed limits or tax laws. Near the bottom of the scale of criminality is the man who drives 10 mph above the speed limit. Near the top is the violent criminal. Most of us fall somewhere between the person who obeys every law and the one who delights in breaking them.