Grass

Grass is a Canadian documentary that examines how marijuana became one of the most contested substances of the twentieth century. Assembled from archival material, the film traces the American government's long campaign against the drug, from the rhetoric that shaped public fears to the shifting official positions that followed. A central thread is Harry J. Anslinger, the first head of the Federal Bureau of Narcotics, whose claims about the dangers of cannabis helped build a climate of prohibition and prosecution. Woody Harrelson narrates, guiding the viewer through decades of anti-marijuana propaganda and the cultural responses to it.

Ron Mann directed, working from a screenplay by Solomon Vesta. The film's cast is largely drawn from archival footage, including appearances by Tommy Chong, Cheech Marin, John Lennon, Ronald Reagan and Jimmy Carter. In Mann's filmography it stands as the earliest of his three listed features, preceding Altman and Clairtone.

Grass runs eighty minutes and belongs to the documentary genre. On TMDB it holds a rating of 6.6 out of 10 from 39 votes, a modest score suggesting a small but engaged viewership rather than broad attention.