Violence used structurally by a system that favours certain social groups, regardless of the specific interaction at any given time between a perpetrator and a victim. It is also called structural violence, which Johan Galtung (1969) defined as violence that is supported by a social structure, harms a person or social group and prevents them from achieving what they need or even from exercising their individual and collective rights. It thus occurs in societies with hierarchical power relations between dominant and dominated subjects.