A healthy relationship is distinguished from an abusive relationship, above all by the existence of a dialectical symmetry between the partners.
In fact, conflict is present in every relationship, in the absence of violence, two people who are in conflict but are in a situation of equal power, can freely compare their positions.
When there is violence, we always find a person who prevails and imposes his will, precisely through the use of violence, and another who succumbs.
(control power wheel and non-violence wheel)