The Systemic approach is defined by the fact of approaching a person in an individual dimension but by taking into account his interactions with the group and the system in which he evolves (family, couple, entourage...).
This is about having a comprehensive understanding of the system.
Indeed, it is necessary to convene the whole group to effect change.
As a result, it is possible to unilaterally alter relations with other members of the group, which may affect the functioning of the group.
Systemic therapies consider the involvement of all family members, but do not treat all members of the group.
An appropriate change in a sub-system often leads to a major change in the entire system.