Historical trauma originated with the social construction of subordinate group statuses through migration, annexation of land, and colonialism. The consequences of creating subordinate group statuses include genocide, segregation, and assimilation. Settler colonialism takes land with militaristic control, labels local inhabitants as deviant and inferior, then violently confines and oppresses the original occupants of the land. Confinement includes relocation, restriction of movement, settlement of lands required for sustenance, as well as confinement in orphanages, boarding schools, and prisons. Historical trauma includes suppression of language, culture, and religion with the threat of emotional, physical, and sexual abuse. Original inhabitant abuse often results in issues with health, mental health, substance abuse, and generational emotional, physical, and sexual abuse. Culturally safe (engagement that respects identity) and trauma-informed social work practices acknowledge the systemic causes of disparities in groups experiencing marginalization and oppression and focus on healing and addressing systemic causes of disparities.