Grass: History of Marijuana is a 1999 Canadian documentary film that chronicles the history of marijuana in the United States. Composed of archival footage, the film is divided into decades and within each decade director Ron Mann discusses the prominent misconceptions regarding the drug in that era. Narrated by Woody Harrelson, the film mostly uses footage in the public domain to further the agenda that the American government has strongly overreacted in the criminalization of the drug. The film blames Harry Aslinger, the first American drug czar, on the criminalization and surrounding legal issues with marijuana, for he promoted false information about its dangers. The film also features original songs by Mark Mothersbaugh and clips from the popular cult film Reefer Madness. Written by Solomon Vesta, Grass: History of Marijuana premiered at the Toronto Film Festival in 1999 and eventually won Canada's Genie Award for Best Documentary.