Grass (2000)

Grass: History of Marijuana is a 1999 Canadian documentary film directed by Ron Mann, premiered at the Toronto International Film Festival, about the history of the United States government's war on marijuana in the 20th century. The film was narrated by actor Woody Harrelson. Edited by Robert Kennedy. The art director and poster designer of the film was Paul Mavrides.
Grass is almost completely composed of archival footage, much of which is from public domain U.S. propaganda films and such feature films as Reefer Madness, as it also served as a portrait of marijuana in popular media.