What is the theme in The Lone Ranger and Tonto Fistfight in Heaven by Sherman Alexie?

Systematic abuse and abandonment of Native peoples by government is a major theme of these stories. Alexie details the various kinds of abuse Native Americans have endured living under the United States government. Not only have Native Americans had their lands taken from them, but they have also been forced to live in reservations and to give up their entire way of life.