Edward S. Curtis was a photographer who dedicated his life to documenting the lives and cultures of Native American tribes in the early 20th century. He took over 40,000 photographs and recorded thousands of hours of sounds over 30 years of extensive travel. His work was published in a 20 volume set called The North American Indian. While his work brought attention to Native American cultures, some criticize that he staged scenes and encouraged tribes to perform outdated rituals. His work was both praised for its documentation but also criticized for potentially misrepresenting Native people and cultures.