Well, the word gang technically means a group of people. If there isn't a group, than it is called a person, not a gang.
groups, mobs
Yes. Many of them are neo Nazi groups.
groups of people who shoot stuff up.
Because that's just how the world is, gangs are everywhere, they've always been here, and always will be.
Some different types of social groups include family groups, friendship groups, work or professional groups, interest groups, and community groups. These groups serve various purposes and can be based on shared characteristics, activities, beliefs, or goals.
Changes between groups, usually scared, this explains why they hang around in gangs. Maybe all white or all black.
groups, crowds, packs, bands, bunches, mobs
Sometimes juveniles join gangs for protection. Juveniles who go to juvi do not always join gangs fr protection.
knoe people join gangs because they want to be cool
Meerkats are the territorial type that live in groups called gangs. As with most territorial, group-based animals, their biggest competetors are other gangs of meerkats.
Actually that's a reference to massive gangs of vampires that orginated in Atlantis.
The Crusades led to increased hostility and mistrust between Christians and other groups, particularly Muslims, due to the military conflict and religious motivations involved. The violence, destruction, and forced conversions during the Crusades strained interfaith relations and left a legacy of resentment and division that persisted for centuries.