Retreatist gangs are unable to gain success through legitimate means and unwilling to do so through illegal ones.
Step-by-step explanation:
Retreatist gangs are also known as criminal gangs and they can be seen in stable neighborhood. They develop in those areas which are unable to give illegitimate or legitimate opportunities. Illegitimate opportunity is a theory that says individual perform crime at that time when there are less chances that the person will be caught . This theory was defined by Richard Cloward and Lloyd Ohlin in the year 1960.
Retreatist gang mainly stress on the consumption of harmful material that is drug which is termed as addiction.