A prison gang is an inmate organization that operates within a prison system, that has a corporate entity, exists into perpetuity, and whose membership is restrictive, mutually exclusive, and often requires a lifetime commitment. Political scientist David Skarbek argues the emergence of prison gangs are due to the dramatic increase in the prison population and inmate's demand for safety. Skarbek observes that in a small, homogeneous environment, people can use social norms to interrupt what behavior is acceptable, but a large, heterogeneous setting undermines social norms and acceptable behavior is more difficult to determine. Prison gangs are geographically and racially divided, and about 70% of prison gang members are in California and Texas. Skarbek suggests prison gangs function simila