Lateral violence

Lateral violence or horizontal hostility is a form of intra-group conflict where members of an oppressed group displace their aggression towards their own community rather than towards the oppressors of the community. Work environments with strong vertical hierarchies and where horizontal hostility is common are associated with poor outcomes for patients and clients. Horizontal hostility benefits oppressing groups and impedes movements that promote social justice.

Targets of horizontal hostility may be members of the group who are perceived to be more mainstream or relatable to the oppressive cultural groups.

Horizontal hostility has been studied in relation to Indigenous communities, institutional settings (especially nursing), and social movements such as feminism.