Containment theory refers to a form of control theory which suggests that a series of both internal and external factors contribute to law-abiding behavior.
Other /More definition:
Containment theory is a theory positing that every person possesses a containing external structure and a protective internal structure, both of which provide defense, protection, or insulation against delinquency.

Moreover, Containment theory is a form of control theory which suggests that a series of both internal and external factors contribute to law-abiding behavior.