Gangsters are the villains in 'Killers of the Flower Moon,' but the biggest thief of Native American wealth was the US government

Based on David Grann's meticulously researched 2017 book, the movie delves into racial and family dynamics that rocked Oklahoma to the core when oil was discovered on Osage lands. White settlers targeted members of the Osage Nation to steal their land and the riches beneath it. From the early 1800s through the 1930s, official U.S. policy displaced thousands of Native Americans from their ancestral homes through the policy known as Indian removal.