

For example, each of the Five Families founded in the early 20th century, outlasted its founders and have survived into the 21st century. However, a gang may also be a larger group with a formal organization that survives the death of its leader. Ī gang may be a relatively small group of people who cooperate in criminal acts, as with the Jesse James gang, which ended with the leader's death in 1882. For example, the common view that illegal drug distribution in the United States is largely controlled by gangs has been questioned. There is agreement that the members of a gang have a sense of common identity and belonging and this is typically reinforced through shared activities and through visual identifications such as special clothing, tattoos or rings.

Much has been written on the subject of gangs, although there is no clear consensus about what constitutes a gang or what situations lead to gang formation and evolution. In modern usage, the term " gang" is generally used for a criminal organization and the term "gangster" invariably describes a criminal. Yakuza or Japanese mafia, are not allowed to show their tattoos in public except during the Sanja Matsuri festival.
