"“The groups are stratified, with one or more leaders and the rest as followers. This pattern continues even today, though the acquisition of language allows such groups to be institutionalized as tribes, armies, political parties, commercial empires, religious hierarchies, or sports teams. All of these have rules requiring defense and extension of territory by carrying some play object—a ball, flag, icon, trademark, or belief system—into someone else’s territory. From the psychological point of view, there is very little difference between making religious converts, kicking the winning goal, or cornering the market on Thorbian gigarums. “Proper gang activity requires the control of members. Gangs cannot tolerate ‘loose’ persons wandering around. One is either with the church or against it; with the company or against it; with the team or against it.”"