Final answer:
The dominant American Indian policy of the United States government from the 1880s to the beginning of the New Deal aimed to assimilate American Indians into American society.
Step-by-step explanation:
The dominant American Indian policy of the United States government from the 1880s to the beginning of the New Deal aimed to assimilate American Indians into American society. The government sought to eradicate Native American culture and promote individual land ownership, western education, Christianity, American appearance, English as the primary language, capitalism, and farming. This policy was implemented through measures such as the Indian Reorganization Act, which granted tribes political autonomy and collective ownership of their lands.