The true - story - based 'Killers of Flower Moon' had a multi - faceted impact on the Osage Nation. The loss of lives was just the tip of the iceberg. There was also the loss of cultural heritage as the murders disrupted the normal life and traditions of the tribe. The Osage people had to live in fear for a long time. Their economic stability was also severely affected as the murders were often related to stealing their oil wealth. And perhaps most importantly, it has taken a long time for the world to recognize and address the atrocities they faced, which has been a form of ongoing injustice for the Osage Nation.