The Qatsi trilogy^{[lower-alpha 1]} is a series of three non-narrative films produced by Godfrey Reggio and scored by Philip Glass. The trilogy includes Koyaanisqatsi (1982), Powaqqatsi (1988), and Naqoyqatsi (2002).

The titles of the films are derived from the Hopi language, in which the word qatsi translates to "life." The series was produced by the Institute For Regional Education, who also created the Fund For Change.^[2][3]

Many of director Godfrey Reggio's other motion-pictures use cinematic techniques and stylistic elements he first explored in the Qatsi trilogy.

The cinematic films of Koyaanisqatsi cinematographer Ron Fricke—Chronos (1985), Baraka (1992), and Samsara (2011)—are also made in a similar style.

• Man with a Movie Camera (1929), a Soviet Ukrainian silent motion-picture whose themes and editing resemble those seen in the Qatsi trilogy