Answer:The new Indian Reorganization Act laid out new rights for Native Americans, and encouraged tribal sovereignty and land management by tribes. The act slowed the assignment of tribal lands to individual members, and reduced the assignment of "extra" holdings to nonmembers.Between 1850 and 1900, life for Native Americans changed drastically. Through U.S. government policies, American Indians were forced from their homes as their native lands were parceled out. The Plains, which they had previously roamed alone, were now filled with white settlers.How did federal government policy toward Native Americans change as white settlers moved to the West? Land that was ceded to Native Americans by treaty was taken from them for white settlement, and they were forced onto reservations.It also affected Native Americans by opening up western settlement and creating governments hostile to their territorial claims. Even more broadly, the Revolution ended the mercantilist economy, opening new opportunities in trade and manufacturing.